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Dissertations / Theses on the topic 'CNC machining centre'
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1
Vinkler, Tomáš. "Aplikace CAD/CAM softwaru PowerMILL 6.0 při 3D obrábění." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2009. http://www.nusl.cz/ntk/nusl-228540.
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The diploma thesis contains detailed processing of a two-piece car form by means of possible accessible 3D strategies of CAM system PowerMILL, selecting of tools, economical evaluation and creation of NC program for CNC machining centre.
2
Randeree, Kasim. "Development of an integrated laser - based tool inspection system for a CNC machining centre." Thesis, University of Hull, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.301631.
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Martiňák, Marek. "Technologické a ekonomické aspekty aplikace CNC obráběcích center." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2010. http://www.nusl.cz/ntk/nusl-229002.
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The Aim of this diploma thesis has been to analyse the application of the CNC machining centers for the production especially with concentration on accuracy and economical aspect of the machining process. After the study of the literature and making familiar with the production on the CNC machine tool of the type Deco Sigma 20 ( manufacturer, the firm Tornos ) it has been evaluated the technology of the design of the chosen part, its machining accuracy and found out the economical parameters of this machinery for this chosen part as a necessary supposition for securing the correct production in accordance with the requirements of the client. The described process of the technological and economical preparation for the production as well as its checking can be used in future for the proposals of the further similar parts.
4
Juráň, Jaromír. "Optimalizace technologie součásti "nosná deska" ve firmě PROMAT Vsetín." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2008. http://www.nusl.cz/ntk/nusl-228355.
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Valorization and analysis of machining technology for the production of aluminium part and consecutively project optimization part production. New advanced cutting tools selection and application of new technologies. The adjustment and simplification of the existing NC program for given CNC machining centre and its final debugging. In the final part, there is an economical and technical evaluation of firm benefits and recommendations into production.
5
Konečný, Jan. "Racionalizace výroby skříní." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2015. http://www.nusl.cz/ntk/nusl-231984.
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The thesis deals with the reorganization of production injection pump casing, when the existing production solution, using cutting lines, did not meet the requirements for flexible manufacturing. There are handled points leading to the replacement of the line of machining centres after a brief introduction of the company. Among the main points of thesis are the design of operations, choice of tools and cutting conditions, proposal clamping device and technology, techno-economic evaluation of the newly introduced production.
6
Nohál, Libor. "Připojení vyvrtávacích hlav s CNC řízenou U-osou na horizontálních centrech Tajmac-ZPS." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2010. http://www.nusl.cz/ntk/nusl-229319.
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The subject of this thesis is a suggestion on mechanism for automatic interfacing of boring and facing heads with CNC U-axis on horizontal machining centres made in Tajmac-ZPS company. The thesis is terminated in modal analysis which is done in the point of view of the constructed boring head´s behaviour.
7
Konečný, Petr. "Racionalizace technologie výroby." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2014. http://www.nusl.cz/ntk/nusl-231504.
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This thesis deals with the rationalization of production technology of selected component. The first part contains a brief introduction of the company NTS Prometal Machining s.r.o. and brief description of the product. The following section is an analysis of existing manufacturing technology. The practical part is focusing on the proposal of rationalization versions of the production process. After evaluation of all possible options of rationalization there has been developed a new technological process with a respect to time and cost savings. Finally there was carried out economical evaluation and recommendation for further production of this component.
8
Sádlo, Dominik. "Racionalizace obrábění skříní převodovek." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2020. http://www.nusl.cz/ntk/nusl-417111.
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Content of the thesis is the proposal of new technology using machining centres, including five controlled axis. Benefit of implementation the new nechnology is investigated at machining example, which is the gear housing of a single stage gearbox, manufactured in the company. In the first part of the thesis, the general properties of gearboxes and their housings are analyzed, as well as the procedure of the current proces of the machining representative. In practical part of the thesis is proposed necessary tool equipment and jig equipment, needed for machining of the part. After that are analyzed and filled in time studies, provided by manufacturers of machining centres. On the bases of these studies, were calculated operating times and operating costs per one piece of the housing. In the part of technical and economical evaluation is calculated the return of initial investment, including costs for byuing new machining cente and cutting tools equipment. Finaly are evaluated the overal benefits of the new technology, given the needs of the company.
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Kopcík, Daniel. "Technologie výroby tvarové součásti víceosým CNC obráběním." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2015. http://www.nusl.cz/ntk/nusl-232185.
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The theoretical part of this thesis is introducing basic information in production of shaped components on CNC machines. It describes each steps from a design of the component to production. Main target is summarization of available modern technologies that can be used. Experimental part uses these modern technologies for processing design shaped component. It describes process of design 3D model part in CAD system, subsequently creation of program for machining in CAM system and solves production of part on CNC machine. The aim of this thesis is design part with interesting design and production difficult enough to represent company, where it was made.
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Šedo, Václav. "Vliv nákupu brusného CNC centra na produktivitu výroby." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2018. http://www.nusl.cz/ntk/nusl-379016.
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This master’s thesis familiarizes reader with technology of machine grinding – it’s history, principle, general use, related tools, achievable parameters and kinematics of grinding process. The core of work is analysis of jig-grinder Hauser H45-400, it’s kinematics, machine technical data, options and accessories. Work concludes with technical and economical assessment of machining of several parts with this machine and compares results to alternative options of machining.
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Shimabukuro, Satoshi, Piero Diaz, and Leonardo Vinces. "Low cost semi-industrial 3GDL CNC vertical milling center design with non-ferrous metal machining capability." Institute of Electrical and Electronics Engineers Inc, 2020. http://hdl.handle.net/10757/656633.
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El texto completo de este trabajo no está disponible en el Repositorio Académico UPC por restricciones de la casa editorial donde ha sido publicado.<br>This work proposes the design of a low cost semi-industrial three degree of freedom CNC vertical milling center (VMC) with non-ferrous metal machining capabilities. The design seeks to mitigate the difficulties that acquiring a commercial industrial CNC can present, such as large dimensions, high cost and complications in its transportation within the plant. The proposed machine will be made up of 1 NEMA 23 stepper motor for each X, Y and Z axis, and will be controlled by open source firmware using an ATMEGA 2560 microcontroller. Likewise, the working area will be 320x180mm and will have a precision 100 microns with semi industrial capacities. This design is aimed at small and medium-sized companies that are looking for a low cost non-ferrous CNC milling machine that in turn has the quality, performance and precision of an industrial one.
12
Jelínek, Petr. "Obrobení náboje kola formulového vozu na CNC obráběcím centru." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2011. http://www.nusl.cz/ntk/nusl-229749.
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The master thesis deals with design and manufacturing of rear right formula hub on CNC machining centre by using modern CAD/CAM technologies. The theoretical part is focused on description and characterization of milling technology and machinability of aluminium alloys. The practical part is focused on the designing formula hub in CAD software Pro/Engineer, proposing machining strategies by using CAM software PowerMILL and manufacturing on CNC machine. There is technical economic evaluation of the machined part at the end of the thesis.
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Soukupová, Veronika. "Optimalizace obráběcího procesu s průmyslovou aplikací na obráběcím centru." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2020. http://www.nusl.cz/ntk/nusl-432721.
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Tato diplomová práce byla vypracována v průmyslovém kontextu, během stáže ve firmě Metso. Zlepšení obráběcího procesu zajišťovacích šroubů bylo cílem této práce, aby byla umožněna budoucí automatizace zakládání obrobku do stroje. Zlepšení bylo zhodnoceno na základě úrovně autonomie během obrábění, eliminace neprogramovaných zastavení stroje operátorem a dostačujícího odvodu třísek. Implementace automatických systému do číslicově řízeného obráběcího centra umožňuje zvýšení produktivity. Před automatizováním obráběcího procesu však musí být proces optimalizován. Zejména dostatečná fragmentace třísek a jejich evakuace jsou klíčové. Dlouhé nedělené třísky můžou poškodit systémy jako například automatický měnič nástrojů, dopravník třísek nebo průmyslového robota. Dostatečná lámavost třísek může být zaručena správným výběrem technologie a strategie obrábění, výběrem řezného nástroje a řezných podmínek pro daný materiál obrobku.
14
Ye, Xiaoyi. "CNC machine design for wheelchair users a case study of fadal vertical machining center 15 /." Thesis, Atlanta, Ga. : Georgia Institute of Technology, 2008. http://hdl.handle.net/1853/24695.
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Flieger, Vít. "Využití netradičních materiálů ve stavbě CNC obráběcích center na nerotační součásti." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2019. http://www.nusl.cz/ntk/nusl-400995.
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This diploma thesis sloves usage of the innovative materials in the construction of CNC machining centers for non-rotational components. There are described innovative materials, machines and parts of these machines at first. Further, there is assigned a suitable material for each part of the machine. For the design part of this thesis is chosen a fixed rack made of polymer concrete for vertical machining center. Finally, the rack and its motion system are designed.
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Věrný, Luděk. "Technologie CNC výroby součástí z hliníkových slitin." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2011. http://www.nusl.cz/ntk/nusl-229842.
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This diploma thesis is elaborated on the specific assignment of AB Komponenty Ltd. The core of this thesis features the technology of manufacturing of component BASE CROSSBAR of aluminium alloy EN AW 2017 on the vertical machining center. CNC control program for the suggested technology is developed in the CAM software PowerMill 2010th. To complete the work it also includes a brief introduction to the issues and analysis of aluminum, aluminum alloys and coatings. From the perspective of the practice is probably the most beneficial and interesting final technical economic evaluation of selected solution of the given problem. The suggested technology can be a significant saving in production costs.
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Král, Ondřej. "Optimalizace řezného procesu pro obrábění hliníkového profilu na CNC obráběcím centru." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2019. http://www.nusl.cz/ntk/nusl-402563.
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This master‘s thesis deals with the suggestion of suitable tools for milling aluminum alloys profiles for the construction of aperture fillings and their aplication to a CNC machining center for increasing the efficiency of the cutting process. The first part of the thesis is focused on the description of the company and the workplace of production of aluminum alloys constructions. The following pages contain description of standardized products, which are used to identify the test profile that is part of the experimental verification. Next part of this thesis is characteristic of aluminum alloys and tool materials suitable for their machining. Second part of this work contains an analysis of the current state, suggestion of new cutting tools and their application to the production proces. At the end of this thesis there is the technical-economic evaluation that deals with the time and economic savings of the applied design.
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Kohút, Josef. "Použití měřících sond (nástrojové a obrobkové) pro stroje z produkce TOS KUŘIM." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2011. http://www.nusl.cz/ntk/nusl-229879.
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The purpose of this dissertation is to familiarize the reader with basic recognition of machine measuring probes for tools and workpieces. Namely then in area of measurement on CNC machining centers. Both recognition from aspects of principle of function of sensing elements and type of transmition to control system, and recognition from constructional aspects are described here. Further it puts mind on equipment of machine probes (touches etc.) and rules for best selection of this equipment. Next part of this work describes selection of appropriate probes, for universal machines from production of firm TOS Kuřim. Last part deals with testing of designed measuring system for concrete machine from production of firm TOS Kuřim. His typical composition, evaluation of tests results and achieved accuracy is also described here.
19
Cunda, Ondřej. "Posouzení bezpečnosti činností obsluhy u svislého soustružnického centra BASICTURN." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2020. http://www.nusl.cz/ntk/nusl-417464.
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The Master's thesis deals with the safety of operator activities at the BASICTURN vertical turning center. The first part is focused on the requirements arising from the directives of the European Parliament and the Council in relevant areas and a system analysis of the issue. The second part is a risk analysis related to operator activities on the operated machine.
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Mecová, Kamila. "Návrh výroby nosiče čepele stroje MRZ / Messerringzerspaner." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2019. http://www.nusl.cz/ntk/nusl-402557.
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The aim of the thesis is focused on the proposal of a new technological procedure of the blade carrier for use in its own production. Currently, the carrier is manufactured by the German company B.Maier Zerkleinerungstechnik GmbH. The work includes several parts. The first part deals with the component itself, its function and importance, as well as its function in the assembly and the whole machine. In the next part the technological procedure of the blade carrier production is created. Fleet of machines including the necessary tools is also designed. In a separate chapter there is an economic evaluation of the proposed solution in two different variants, a subsequent evaluation and a proposal for implementation.
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Santos, Marcelo Otávio dos. "Modelagem numérica e experimental dos erros térmicos de um centro de usinagem CNC 5 eixos." Universidade de São Paulo, 2018. http://www.teses.usp.br/teses/disponiveis/3/3151/tde-04102018-072516/.
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Esta tese teve por objetivo desenvolver um algoritmo preciso e robusto capaz de compensar os erros térmicos volumétricos de um centro de usinagem 5 eixos em diferentes condições operacionais. O comportamento térmico da máquina foi modelado usando técnicas do método dos elementos finitos (MEF) com base na teoria do calor de atrito e calor de convecção, e validadas através dos vários campos de temperatura obtidos experimentalmente usando termopares e imagens térmicas. Os principais subsistemas da máquina foram inicialmente modelados, como o conjunto de fusos de esferas, guias lineares e motofuso, o que permitiu posteriormente a validação do comportamento termoelástico da máquina completa para onze ciclos de trabalho em vazio, seis ciclos de usinagem, nove ciclos de posicionamento e dois ciclos com temperatura ambiente variando, obtendo erros máximos inferiores a 9%, ao comparar os resultados numéricos com os resultados experimentais. A validação do modelo em elementos finitos permitiu usar os resultados obtidos para treinar e validar uma rede neural artificial (RNA) para prever os erros térmicos do centro de usinagem. Os desvios entre os erros térmicos previstos pela RNA e os calculados pelo MEF foram inferiores a 5%. Baseado nos resultados obtidos pelas medições das peças de trabalho usinadas foi possível formular e implementar um modelo de compensação dos erros térmicos no CNC do centro de usinagem, que obteve uma redução dos erros entre 62% e 100% nas peças usinadas com compensação. Foi também proposto um algoritmo de previsão e compensação dos erros térmicos para o centro de usinagem, baseado em todos os ciclos e simulações realizadas, e que se comparando com os resultados experimentais mostrou-se capaz de reduzir os erros térmicos entre 50% e 95%. Após sua validação, foi possível concluir que o algoritmo desenvolvido é uma ferramenta precisa e robusta para compensar os erros térmicos da máquina para várias condições de trabalho, podendo compensá-los mesmo com esta movendo-se a diferentes velocidades, em usinagem ou mesmo operando em temperatura ambiente variável.<br>This thesis aims to develop an accurate and robust algorithm capable of compensating the volumetric thermal errors of a 5-axis machining center under different operating conditions. The thermal behavior of the machine was first modeled using finite element method (FEM) techniques based on theory of friction heat and convection heat, and validated with the various experimentally raised temperature fields using thermocouples and thermal imaging. The main machine subsystems were initially modeled, such as the ball screw system, linear guides and spindle, which allowed for validating of the thermoelastic behavior of the entire machine for eleven no load duty cycles, six cycles of machining, nine cycles of positioning and two cycles with varying ambient temperature, obtaining errors lower than 9%, when comparing the numerical results with the experimental results. The validation of the finite element model allowed for the use of the results obtained to train and validate an artificial neural network (ANN) for predicting the thermal errors of the machining center. The deviations between the thermal errors predicted by ANN and the FEM simulation results were less than 5%. Based on the results obtained by the measurements of the machined workpieces, it was possible to formulate and implement a model of compensation of the thermal errors in the CNC of the machining center, which obtained a reduction of errors of 62% and 100% of the machined parts with compensation. It was also proposed a thermal error prediction and compensation algorithm for the machining center, based on all cycles and simulations performed, and that, comparing with the experimental results, it was able to reduce the thermal errors between 50% and 95%. After its validation, it was possible to conclude that the developed algorithm is an accurate and robust tool to compensate the thermal errors of the machine for various duty conditions, being able to compensate the errors even when it is moving at different speeds, in machining process or even operating in variable ambient temperature.
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Drozdov, Filipp. "Problematika uvádění obráběcích center na trh Evropské unie a Společenství nezávislých států." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2020. http://www.nusl.cz/ntk/nusl-433557.
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This thesis discusses introducing CNC machining centers to the markets of the European Union and the Commonwealth of Independent States (currently the Eurasian Economic Union). The first chapter of the thesis focuses on the legal requirements for placing the products on the markets of the European Union and the Eurasian Economic Union, their comparison, systematic analysis of the problem, and certification schemes. The second chapter of the thesis analyses safety requirements for CNC machining centers, discusses CNC machines checklists development and their comparison for the markets of the European Union and the Eurasian Economic Union.
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Tang, Yueh-Hua, and 湯岳樺. "Type Synthesis of Multi-Axis CNC Machining Center." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/r2wedr.
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碩士<br>國立虎尾科技大學<br>機械設計工程研究所<br>103<br>The purpose of this paper is to use of innovation synthetic methods for generate multi-axis machine tools. The first step is to select one of existing machines, to analyze topology, design requirement, constrained , motion characteristics and the magazine''s design. Including the number of parts (points) and the joint (side) and determines the endpoint tree-graphs parts, model category including single, double-spindle or single, two-table, number of tool, and the endpoint machine operation relationship. Then, the mechanism converted into tree-graphs, through generalizes tree-graphs and specialized tree-graphs synthesized five to six-axis all machine tools. Five axis machine tools vertical and horizontal are seven types and four types. Six axis machine tools vertical and horizontal are twenty-two types and eleven types. Finally, synthesis of innovative seven and eight axis machine tools. Then to establish the error model for machine tools. The homogeneous transformation matrix (HTM) derives the error model to construct the coordinate System Schematic of machine tools, to calculation tool and workpiece of position error. Lists the filter conditions and Setting error range, select the best of the seven and eight-axis machine tools.
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Yang, Chi-Ming, and 楊基明. "Diagnostic Expert System Design for CNC Machining Center Maintenance." Thesis, 1995. http://ndltd.ncl.edu.tw/handle/00433566894560181047.
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碩士<br>國立交通大學<br>工業工程研究所<br>83<br>A systematic methods based on customer maintenance data,
IDEF0 skills, and adjacency matrix test is proposed to
design the knowledge base of diagnostic expert system
for CNC machining center. From the customer maintenance
data, a hierarchical knowledge base consisting of category,
symptom, failure, test and repair is constructed, The
relationship between component category of CNC machine
center and symptom is specified using IDEF0 skills. Then
the consistency between knowledge base and customer
maintenance data is verified through adjacency matrix test.
After this, a second test for the knowledge base is
through many feedbacks from users. Also a prototype diagnostic
expert system based on InSuppoert for a CNC machining center
FV-800A, Fair Friend Ent. Group, has been implemented for
demonstration purpose.
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Chen, Yi-Jen, and 陳怡仁. "An Intelligent Tool Breakage Monitoring System of a CNC Machining Center." Thesis, 1997. http://ndltd.ncl.edu.tw/handle/79048740042165679346.
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碩士<br>國立中正大學<br>機械工程學系<br>85<br>An effective tool breakage monitoring system can detect tool
breakageas early as possible to prevent irreparable damages of
workpiece and machinetool. And, for unmanned manufacturing
operations, in-process monitoring oftool breakage plays a
critically important role. The goal of this thesis is to
devolp an intelligent tool breakage monitoring system of a CNC
machine center. Because none of sensing anddiagnosis techniques
can assure reliable in practical operations, a sensorfusion
method was proposed. The cutting force signal, acoustic emission
signal and the motor current signal were used, the motor current
sensing techniques were the first part of this thesis. Because
it is hard to identifydirectly from these raw signals, the
second part of this thesis would examinethe feasibility of
extracting feature of tool breakage from wavelet transformof
cutting force signal. The experimental results show that the
ocurrence of tool breakage could be detected from the motor
current sensing. And thecoefficients of wavelet transform of
cutting force could be used to monitortool breakage.
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Chen, Shung-Tong, and 陳順同. "Development of Vertical Micro CNC Electrical Discharge Machining Center and Research of Micro 3D Parts Machining." Thesis, 1997. http://ndltd.ncl.edu.tw/handle/76447182009905163511.
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碩士<br>國立雲林科技大學<br>機械工程技術研究所<br>85<br>The tiny 3D components, such as optical fiber connector, micro-die and punch, non-spherical optical lens and tiny gears, are broadly used in the industries with significant add-on value. The micro-EDM technique is appropriate for producing those tiny parts. Thus, various machining properties of micro-EDM technique are researched inthis paper. In micro-EMD, the electrode wear may result in significant loss of machining accuracy. With CAD/CAM technique, this problem is compensated by designing contouring path with different directions in this research. From the experiments in the laboratory, it is shown there exists certain improvement in dimension accuracy, geometry accuracy as well as surface roughness.
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Chen, Shun-Tong, and 陳順同. "Development of Micro CNC Machine Center and Research of Micro Parts Machining." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/49888591527014413453.
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博士<br>國立臺灣大學<br>機械工程學研究所<br>93<br>In this paper a multi-function high precision tabletop CNC machining center formaking micro parts is developed. All the needed machining processes can be carriedout on the same machine without the need to unload, reload and eadjust the workpiece for subsequent process. Currently the functions of Micro CNC milling,Micro EDMilling, Micro Wire-cutting, and Micro on-line measuring have been accomplished and tested. In the developed machine a dual spindle design for Micro CNC milling, and for the manufacturing of icroelectrode and the following micro hole or die making by EDMilling, respectively is proposed and constructed. The
necessary software written in Borland C++ language is developed as well. The Micro CNC milling is tested by the use of a milling cutter of 0.1 mm diameter and by a special design diamond tool. Satisfactory results are achieved. The microelectrode is produced via WEDG process, and it is used for micro hole drilling and 3D micro parts manufacturing by micro EDMilling. In Micro wire-cutting a 20µm diameter fine wire is used. A novel mechanism that allows vertical/horizontal/slant angle wire cutting is designed. Micro parts such as outer gear, internal gear, rack, etc. having no taper angle on the machined part are successfully manufactured. A micro pagoda of size 1.25x1.25x1.7 mm is also produced to demonstrate the machine’s superior ability. Furthermore, based on the “short-circuit principle” and the micro probe manufactured by WEDG process, an on-line micro part measuring system to evaluate the flatness of the machined part, and the circularity and straightness of the micro-hole is developed and implemented.
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Huang, Zheng-Hao, and 黃政豪. "Using Artificial Neural Network to Predict Processing Time of CNC Machining Center." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/42u6fr.
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碩士<br>國立臺灣科技大學<br>機械工程系<br>106<br>In the manufacture industry, CNC become a part of indispensable roles. Because of the process scheduling and delivery deadline, predict the machining time become very important. All of the CAM software likes the NX, used the length of cutting roots divided
by the feedrate to predict the machining time, but in reality, machine have different
acceleration, deceleration followed by different motion type and different machine have its own machine performance, so the time predict will not very accuracy. Neural network is
applied in every field accompanied by the big data and Artificial Intelligence. It is used to predict the surface roughness, surface topography, cutting force and machining temperature. In this thesis, we are used backpropagation neural network to predict the
machining time. Between that we consider the effect factor which is caused by the motion
type, linear and circular. Finally, we can use this model to predict the machining time.
According to the research, using LM, one hidden layer and sixty hidden layer neurons to
train the little 5-axis machine model can reach the error rate between 0.3 to 8.3% ; however, the NX error rate is between 6.7 to 18.5%. Then we used the same method to get the QUASER UX300 CNC machining time and trained it, the model error rate can reach 0.37
to 6%, this thesis confirmed that used this experiment method can train the time model
rapidly and suitable for every machine.
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Chiu, Kao-Hon, and 邱高弘. "A Case Study of Intelligent production system For The CNC Machining Center." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/ksvvmh.
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碩士<br>國立臺灣科技大學<br>管理學院MBA<br>107<br>In order to enhance the advantage in the market, SBL Machinery Co., Ltd set up a parts processing center. The purpose was to shorten the development time of R & D machinery. Upon setting up a processing center, however, a large number of CNC machinery was purchased due to the error of R & D process evaluation, leading to the insufficiency of the overall processing utilization rate. Then, many parts were withdrawn from the suppliers, causing that the processing center afterwards could not make time to produce developed products, which did not fit for the original purpose. In the meantime, the withdrawal of parts from the suppliers brought about a significantly worse situation of the degree of coordination with the suppliers, as well as the price.
For the purpose of breaking this deadlock, SBL and Solomon Enterprises Ltd. developed a set of intelligent production system, the use of AIOT technology, to achieve a small variety of production models. Not only did it reduce the amount of inventory parts, but it shortened the production time of standard parts. The processing center, therefore, had enough time to produce developed products. Through this cooperation, the ability of technology was upgraded, and the advantages and disadvantages of the business model were re-counted.
Companies push their suppliers forward by means of the intelligent production system, counseling them to establish a systematic management thinking to improve the efficiency of production and to increase the companies’ revenues. By such
counseling activities, the partnership between the two sides can be re-built to create a win-win situation. As far as SBL is concerned, it can learn the know-how of processing field in the process of counseling and use AIOT technology more skillfully. In the future, SBL can create another technical field.
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Hu, Chi-Kuan, and 胡其寬. "The Study on Machining Time Estimation of the Part Program and Drilling Path Optimization for CNC Machining Center." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/hvmce9.
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碩士<br>國立臺北科技大學<br>製造科技研究所<br>94<br>According to the feed rates setting and the tool cutting paths planned by the CAD/CAM system, the post-processor of the CAD/CAM system is able to calculate the part program total machining time on a numerically controlled (NC) machine tool. For a CAD/CAM system, machining time calculating usually has no considered the delay of feed rates of the CNC machine tool itself. Therefore, the actual machining time of a part will be a longer duration than the estimated time by CAD/CAM system. In present study, by using a laser dynamic interferometer (HP-5529A) to measure the actual feed rates of CNC machine tool with some sampling feed rate and move length commands. In this paper, by using the measured data, an algorithm of predicting actual part program machining time is presented. Experiments of pocket milling and free form surface machining are conducted for the verification of the proposed method.
The total machining time of the part program includes the time of real cutting work material and the time of tool positioning movements. Many researchers focus on the cutting conditions analysis in order to minimize part-machining time. But fewer researchers gave attentions on the time of tool positioning movements during machining. Traveling Salesman Problem (TSP) is a typical and famous optimization method for the moving paths problems. In the latter part of this thesis has been using the TSP method to investigate the optimization of the drill positioning paths.
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Hung-Chung, Chen, and 陳皇彰. "Development of horizontal micro CNC electrilcal discharge machining center and research of micromachining." Thesis, 1998. http://ndltd.ncl.edu.tw/handle/95482830070095708496.
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碩士<br>國立雲林科技大學<br>機械工程技術研究所<br>86<br>The large-EDM machining center is all around in Taiwan, but it is less seen in the research and manufacture of micro-EDM machining center. This research has an important contribution in this filed of precision micromachining, at the current sytage of progress in Taiwan manufacturing industy. In this research, we try to develop a three axle multifunctional horizontal micro CNC electrical discharge machining center in hardware, and develop control programs for window interfaces in soferware. In this machin developed in laboratory micro electrodes with diameter as 10(m hare successfully fabricated. Beside promoting the technological level in the file, this research can extend various appliciations.
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Hsu, Yuan-Lung, and 徐源隆. "The Study of an Optimal Milling Process for PC-Based CNC Machining Center." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/50173555502809324251.
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碩士<br>國立高雄應用科技大學<br>電機工程系<br>98<br>As time goes by industry，high speed、high quality and the short date of delivery，it has been became a developing trend of processing manufacturing industries and mold manufacturing industries，and the speed and accuracy of the process the CNC machining that acted the important role。The essay aimed at the difference of the local PC-Based CNC controller and foreign specific used CNC controller，to provided an efficiency method of the parameter tuning for machining center，used on medium、smaller high speed machining center，to performed the performance of the extra-working by the machining center，and to make the local PC-Based CNC machining center to possess the more competition in the world。
At first，to achievement the best performance tuning of the system of the laboratory machining center，and used the Taguchi Method to plan the experiment，to find out separately the parameter of the impacted the extra-working speed and accuracy by the parameter which proposed through controller center，and to grouping，thus the users can use by different extra-working requirement，directly to choose application parameter group on the extra-working program，thus would be achieved the best purpose by using extra-working program or tuning parameter automatically
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WEI, WU-TSUNG, and 吳聰維. "Research on the Surface Finish of Al-6061T6 on a CNC Machining Center." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/j45y47.
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碩士<br>國立臺灣科技大學<br>機械工程系<br>105<br>The objective of this research is to develop a ball burnishing and ball polishing surface finish process on a three-axis and five-axis CNC machining center, respectively, to improve the surface roughness of Al-6061T6. The optimal plane surface ball burnishing and ball polishing parameters have been determined by conducting the Taguchi’s L9 matrix experiments, ANOVA analysis, and the verification experiments, respectively. The determined optimal ball burnishing parameters were as follows: the burnishing force of 90 N, the feed rate of 300 mm/min, the step over of 20 μm. The surface roughness of the flat specimens could be improved from Ra 0.8μm to Ra 0.22μm by using the determined optimal ball burnishing parameters. The optimal ball polishing parameters were as follows: the spindle speed of 12,000 rpm, the feed rate of 40 mm/min, the step over of 40 μm, the depth of penetration of 90 μm (1N). The surface roughness of the flat burnished specimens could be improved from Ra 0.22μm to Ra 0.14μm. Finally, the optimal ball burnishing and ball polishing parameters were applied to a 3D aspherical surface by using three-axis and five-axis CNC machining center, respectively. The difference of surface roughness between the three-axis process and the five-axis process has been investigated. The improvement of the surface roughness was better by using the five-axis process compared with the three-axis process.
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"Multi-Axes CNC Turn-Mill-Hob Machining Center and Its applications in biomedical engineering." 2012. http://library.cuhk.edu.hk/record=b5549559.
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随着对减小零件尺寸和增加其复杂性和准确性的日益增加的需求，传统机床已经不能有效的加工微型元件了。一个典型的例子是牙科种植体（生物医学设备）和和用于机械手表机芯的齿轮轴。由于这些零件的复杂几何形状和严格的公差要求，市面上只有很少一部分机床有能力加工它们。我们设计的多轴数控“车削-铣削-滚齿加工中心对加工精密复杂工程零件是非常有效的。此机器为8轴机床，除了执行加工的8轴外，还有一个自动上料机构和一个自动收集机构,可以实现自动上料，加工，收集等整条生产线的运作。运用电子齿轮技术以保证精密滚齿功能；运用先进控制技术（深层交叉耦合技术）以保证多轴的同步控制，实现加工的高效，高精度，并且容易使用。另外，为了保障机床精度，我们研发了多轴数控机床几何误差的软件补偿技术。根据实验测试，此加工中心的车削精度为0.003毫米，铣削精度为0.005毫米，滚齿误差小于0.0075毫米。<br>众多的生物医学零件是轴不对称零件。虽然这些零件可以用传统的数控加工方法进行加工，但是效率极低且成本高。而基于我们加工中心的新型铣削方法可以有效、高精度的加工这些零件。这种方法是运用极坐标的插值原理，比利用笛卡尔直角坐标系加工的原理更加优越，特别是当需要一个线性轴和旋转轴插值生成曲线时。为了方便使用这个极坐标插值模块，我们开发了一系列特殊的极坐标加工G代码。整个开发的程序模块最终融入我们多轴数控“车削-铣削-滚齿“加工中心。<br>另外一个重要的发现是运用滚齿方法加工轴对称和轴不对称零件。从滚齿方法被发明出来的这100年中，其一直是最有效的加工齿轮的方式。它的高效是由于多个刀齿同时切削工件。现在，滚齿是一种标准的加工方式并且每天运用这种方法加工几百万个零件。但是，没有人用这种方法加工轴不对称零件。经过仔细研究滚齿原来，可以得出以下观点：一）齿轮的齿形是与滚刀的齿形一样的；二）齿轮轮廓是由工件和滚刀的相对位置确定的。把滚刀设计和控制工件和滚刀的相对位置结合起来，我们发现运用滚齿的方法是可以加工各种轴对称和非对称部分，例如：星形零件和多边形零件。特别是，该方法可以有效的加工不断变化的轴不对称零件。最后，我们比较其的加工效率和传统的铣削加工，结果验证运用这种方法的加工时间远小于采用铣削方法。<br>我们设计的加工中心和新型加工方法在生物医学工程有很多的应有。牙科种植体就是一个典型的例子。具权威机构统计，约有10%的人会在一生中选用种植牙技术对牙齿进行修复。但是不幸的是，没有人研究个性化种植体。目前，市面上的种植体并不能精确的适合病人牙根情况，完成特殊口腔环境的牙齿修复。所以，对个性化种植体的研究是迫切并具有市场效益的。关于个性化种植体研制的一个难点是其的制造。个性化种植体之所以难加工是由于它的复杂形状及所用材料（钛）。但是，我们设计的多轴数控“车削-铣削-滚齿“加工中心和基于此机床的新型加工方法可以有效、高精度的加工此种植体。<br>With the ever increasing demand for reduced size and increased complexity and accuracy, traditional machine tools have become ineffective for machining miniature components. A typical example is the dental implant and the other is the pinion used mechanical watch movement. With complex geometry and tight tolerance, few machine tools are capable of making these parts. We designed and built a CNC Turn-Mill-Hob Machining Center that is capable of machining various complex miniature parts. The machining center has 8 axes, an automatic bar feeder, an automatic part collection tray, and a custom-made CNC controller. In particularly, the CNC controller gives not only higher accuracy but also ease of use. In addition, to improve the accuracy, a software based volumetric error compensation system is implemented. Based on the experiment testing, the machining error is ± 4 μm for turning, ± 7 μm for milling, and the maximum profile error is less than ± 7.5 μm for gear hobbing.<br>Many biomedical parts are axial asymmetric parts. While these parts can be machined using conventional CNC machining methods, the efficiency is low and the cost is high. We proposed a new CNC machining method based on polar coordinate interpolation, which is better than the Cartesian coordinate interpolation when rotational axes are involved. To facilitate the use the polar coordinate interpolation module, a special G code is developed. This module is integrated into our CNC Turn-Mill-Hob Machining Center.<br>Another important development is the use of hobbing method for machining axial symmetric / asymmetric parts. Invented some 100 years ago, hobbing is the most efficient method for machining gears. Its efficiency lies on multiple teeth simultaneous cutting. Presently, gear hobbing is a standard manufacturing process making millions of gears every day. Though, no one has used it for machining axial asymmetrical parts. After carefully examining the gear hobbing, it is found that the profile of the gear tooth is determined by a combination of the profile of the hob tooth and the relative position and motion between the hob and the workpiece. Therefore, by tuning the hob tooth profile and controlling the relative position and motion between the hob and the workpiece, it is possible to machine various axial symmetrical and asymmetrical parts, such as a start, a hexagon and etc. This method is efficient to machine continuously changed axial asymmetrical parts. This is validated by means of experiments. The experiments also indicate that the new method is much more efficient than the conventional milling method.<br>Our machining center and new machining methods have many practical applications. Dental implant is a typical example. It is estimated that 10% of the people will need dental implants in their life time. Presently, there are a number of brands in the market, though these implants may not fit for patients who have special oral conditions. In this case, custom-made implants are necessary. The key problem of the custom-made dental implant is manufacturing. Our multi-axes CNC Turn-Mill-Hob Machining Center and the new machining method can effectively machine the custom-made dental implants. Moreover, the efficient is good.<br>Detailed summary in vernacular field only.<br>Detailed summary in vernacular field only.<br>Detailed summary in vernacular field only.<br>Detailed summary in vernacular field only.<br>Chen, Xianshuai.<br>Thesis (Ph.D.)--Chinese University of Hong Kong, 2012.<br>Includes bibliographical references (leaves 116-127).<br>Electronic reproduction. Hong Kong : Chinese University of Hong Kong, [2012] System requirements: Adobe Acrobat Reader. Available via World Wide Web.<br>Abstract also in Chinese.<br>Abstract --- p.I<br>摘要 --- p.III<br>Acknowledgement --- p.V<br>Table of Contents --- p.VI<br>List of Tables --- p.VIII<br>List of Figures --- p.IX<br>Acronym --- p.XIII<br>Chapter Chapter 1: --- Introduction --- p.1<br>Chapter 1.1 --- Background --- p.1<br>Chapter 1.2 --- Overall Literature Review --- p.3<br>Chapter 1.3 --- Objectives --- p.17<br>Chapter Chapter 2: --- The Multi-Axes CNC Turn-Mill-Hob Machining Center --- p.18<br>Chapter 2.1 --- A Brief Review --- p.18<br>Chapter 2.2 --- The Design and Prototype --- p.20<br>Chapter 2.3 --- The CNC Controller --- p.26<br>Chapter 2.4 --- The Calibration --- p.32<br>Chapter 2.5 --- Cutting Tests --- p.35<br>Chapter 2.6 --- Summary --- p.43<br>Chapter Chapter 3: --- Hobbing Gears and Axial Asymmetric Parts --- p.45<br>Chapter 3.1 --- A Brief Review --- p.45<br>Chapter 3.2 --- The Theory --- p.47<br>Chapter 3.3 --- Computer Simulation --- p.54<br>Chapter 3.4 --- Cutting Tests --- p.68<br>Chapter 3.5 --- Summary --- p.78<br>Chapter Chapter 4: --- Millining Axial Asymmetric Parts --- p.80<br>Chapter 4.1 --- A Brief Review --- p.80<br>Chapter 4.2 --- The Theory --- p.81<br>Chapter 4.3 --- Cutting Tests --- p.89<br>Chapter 4.4 --- Summary --- p.94<br>Chapter Chapter 5: --- Machining Dental Implants --- p.95<br>Chapter 5.1 --- A Brief Review --- p.95<br>Chapter 5.2 --- The Database of Custom-made Dental Implant --- p.98<br>Chapter 5.3 --- The Design and FEA --- p.103<br>Chapter 5.4 --- Cutting Tests --- p.108<br>Chapter 5.5 --- Summary --- p.110<br>Chapter Chapter 6: --- Concluding Remarks and Future Work --- p.111<br>Chapter 6.1 --- Concluding Remarks --- p.111<br>Chapter 6.2 --- Future Work --- p.113<br>Bibliography --- p.116<br>Publication Record --- p.127
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Hsu, Ming-Liang, and 徐銘良. "Research on the Automated Spherical Polishing with Constant Force Control on a CNC Machining Center." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/80208696320364053862.
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碩士<br>國立臺灣科技大學<br>機械工程系<br>103<br>The purpose of this research is to develop a constant force spherical polishing system to solve the wear problem of the polishing ball and improve the surface roughness of the POLMAX stainless steel. A set of software programmed with Visual Basic 6.0 has been developed to monitor and maintain the polishing force, to carry out the fuzzy control, and to generate the NC codes for the machining path of ball polishing.
The optimal burnishing and polishing parameters were determined by the Taguchi’s experimental method. The determined optimal burnishing parameters were as follows the burnishing force of 400 N, the feed rate of 500 mm/min, the stepover of 10 μm, and the surface roughness of the burnished test specimens could be improved to Ra 0.16 μm. The determined optimal polishing parameters were as follows the spindle speed of 11000 rpm, the feed rate of 30 mm/min, the stepover of 40 μm, the depth of penetration of 120 μm, the Liquid:Water 1:20, and the surface roughness of the polished test specimens could be improved from Ra 0.16 μm to Ra 0.0189 μm without force control, Ra 0.012μm with force control, Ra 0.126 μm without force control with regard to a 3D test carrier of an aspheric surface, Ra 0.050μm with force compensation to a 3D test carrier of an aspheric surface. Finally, the surface roughness of the polished test specimen with saddle surface could be improved to Ra 0.034μm polished along the normal vector by using the five axis machine
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Wang, Guan-Shiang, and 王冠翔. "Study of The New Volumetric-Error Measurement Method and System for Micro CNC Machining Center." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/59117933857107892832.
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碩士<br>中原大學<br>機械工程研究所<br>104<br>Non-MEMS micro machining technology has been regarded as one of the key technologies for the development of precision industry. However, very less research efforts had been devoted in developing volumetric error measurement method and synchronous movement error calibration. Due to the workspace constraints of a micro machine tool, the current measurement methods used in industry cannot be applied. With use of image identification/tracking, coordinate transformation and sensitivity analysis, the volumetric-error measurement method and system for micro CNC machining center with use of image capture system were developed in this study. The methods provide 4 main functions: (1) volumetric error measurement, (2) error characteristics analysis, (3) Rotation accuracy measurement (4) convenient human-machine interface with graphical display for micro machine tool.In addition to develop the methods and systems, sensitivity analysis was made. Micro machining experiments were conducted on a micro machine tool to verify the feasibility and reliability of the developed system.
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HUANG, YI HSIANG, and 黃亦祥. "The Study on a Large Area Polishing Technique by Combining with Electro-rheological Fluid and CNC machining Center." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/79860334725735773875.
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碩士<br>東南科技大學<br>機械工程研究所<br>102<br>In this paper, by the characteristics of the electro-rheological (ER) fluid, and propose an innovative large area polishing technique by combining with ER fluid and CNC machining Center. The characteristics of innovative large area polishing technique do not need very high-precision plane datum and the two planes can be processed at the same time. Firstly, a ER viscous force measurement system was designed in this paper, in order to investigate the ER effect in different parameters. The abrasive grains were added to the ER fluid, and then uniformly mixed into the ER polishing slurry. The CNC machining center is used to a platform. The spindle and bed in the machining center were set each holding a large area flat conductive workpiece, and placed the ER polishing slurry between the up and down plane of workpiece and controlled the gape between of the upper and lower plane of workpiece to maintain a proper spacing. A high-voltage generator was used to supply the appropriate voltage, the workpiece on spindle was set an anode and the workpiece on the bed was set a cathode. Let the spindle rotational motion and the planetary motion, so that both the upper and lower plane can be grinding and polishing under the environment of the ER polishing slurry, and gradually form planes. After experiments, it can be found that the slurry composition, abrasive grains size, spindle speed, moving path, feed rate have significant impact on the processing capacity of large area polishing technique.
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Lin, Chen-Kang, and 林成康. "A Study of Organizational Buying Behavior for Machine Tools in Taiwan - An Illustration of CNC Lathe and Machining Center." Thesis, 1996. http://ndltd.ncl.edu.tw/handle/67688563289817098590.
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Jhong, Hong-Ming, and 鍾宏明. "Research on the Constant Force Control of Ball Polishing on a CNC Machining Center Using the Lab-made Polishing Ball." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/4cd6ey.
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碩士<br>國立臺灣科技大學<br>機械工程系<br>107<br>The purpose of this research is to develop a new type of lab-made polishing rubber ball to improve the processing limitations of the traditional polishing, and to overcome the wear of the lab-made polished rubber ball caused by the long time polishing process. A set of software programmed with Visual Studio C# has been written for polishing force sensing and polishing force fuzzy control, so that the polishing force correction value was generated during the ball polishing process. The correction value was used to offset the tool length, so that the polishing force would be quasi-constant acting on the surface of the test piece. With the constant force control technique, the surface roughness of the stainless mold steel STAVAX has been approved and the polishing processing time of the polishing ball has been extended.
The optimal polishing parameters have been determined by the Taguchi’s experimental method. The determined optimal polishing parameters were as follows the type of rubber of Fluoroelastomer (FKM), the spindle speed of 7500 rev/min, the feed rate of 30 mm/min, the stepover of 10 μm, the depth of penetration of 90 μm. The surface roughness of the polished test specimens on 2D flat test piece could be improved from Ra 0.04 μm to Ra 0.023 μm without force control, and to Ra 0.013 μm with force control. The surface roughness of the polished test specimens on the test specimen with saddle surface could be improved from Ra 0.07 μm to Ra 0.033 μm without force control, and to Ra 0.03 μm with force control polished along the surface normal direction by using the five axis machine.
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CHEN, KAI-SIANG, and 陳楷祥. "Research on the In-process Measurement by integrating a TS640 touch trigger probe with a Five-Axis CNC Machining Center." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/85876105304278813104.
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碩士<br>國立臺灣科技大學<br>機械工程系<br>103<br>This work developed a five-axis in-process measurement system by integrating an TS640 touch trigger probe system with the five-axis CNC machine tool. The TS640 touch trigger probe is equipped with a vector-based measurement function that it can be used to do the 3D in-process measurement of a workpiece with freeform surface and regular geometric features. The accuracy of the probe was determined by the repeatable measurement of the ring gauge. The center coordinates deviation of a ring gauge was, in general, within +-5 microns, based on the calibration results.
The developed in-process measurement system comprises the notebook, the Heidenhain five-axis CNC machine controller and the TS640 touch trigger probe system. A set of measuring software programmed with Visual Basic 2010 has been developed to carry out the measuring path configuration and measured data analysis.
The geometric dimensional error between the in-process measurement and the CMM measurement was calculated by developed software. According to the experimental results, a freeform surface error was 0.0220mm, the average error for individual impeller cutter suction surface was 0.0252mm, the pressure surface was 0.0349mm, edge side was 0.0572mm, Based on the measurement results, it shows that the probe is with good reproducibility and accuracy to carry out the in-process measurement.
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LU, Che-Wei, and 呂哲瑋. "Research on Reverse Engineering and the Optimal Cutting Parameters of a Pure Titanium Artificial Dental Framework on a Multi-Axis CNC Machining Center." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/17994543238337398846.
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碩士<br>國立臺灣科技大學<br>機械工程系<br>93<br>The objective of this study is to determine the optimal cutting parameters of pure titanium (grade 2) and to develop the fabrication method of an artificial dental framework of pure titanium using reverse engineering technique.
The optimal plane surface cutting parameters of pure titanium were determined by executing the Taguchi’s L18 orthogonal array experiment, analysis of variation (ANOVA), and the full factorial experiment. The combination of the determined optimal cutting parameters are spherical cutting tool with material of coated tungsten carbide WC (TiN), spindle speed of 22,000 rpm, cutting depth of 40μm, feed rate of 300 mm/min, and step-over of 100μm. The surface roughness of Ra=0.147μm (Rmax=1.486μm) for the pure titanium could be obtained by utilizing the optimal cutting parameters.
In addition to the determination of the optimal spherical cutting parameters of pure titanium (grade 2), the fabrication method of an artificial dental framework of pure titanium has also been investigated via reverse engineering technique. The 3D data points of the framework model were digitized sequentially by the 2D contour scanning and Y-axis scanning procedures on a Renishaw Cyclone profile scanning machine using a touch trigger probe. A CAD model of the framework can then be constructed based on the digitized 3D data points. With the help of PowerMill CAM software, the machining path of the framework, and the correspondent NC codes were generated to fabricate the framework on a multi-axis CNC machining center. The 3D average surface roughness of Ra=0.371μm could be obtained using the optimal machining parameters.
A set of software, programmed with Borland C++ Builder 6.0 language used to modify the scale of the 3D digitized data points, was also developed and applied successfully to the reverse engineering measurement of a Taiwan model.
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Chen, Zhao-Jin, and 陳昭瑾. "A study of the environmental temperature variation induced thermal deformation and the thermal balance strategy for a large gantry type CNC machining center." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/re5rg9.
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碩士<br>國立中興大學<br>機械工程學系所<br>106<br>This study investigated the thermal displacement characteristics of two domestic 5-axis large gantry type CNC machining center with different structures, mainly affecting the temperature variation and thermal deformation of the entire machine structure due to environmental temperature changes. In the experimental measurement section, multiple critical temperature measurement points are placed on the machine, and the non-contact eddy current displacement meter is used to obtain the instantaneous thermal displacement. Based on the experimental measurements, a multi-physics simulation model was constructed.
In order to achieve more flexible thermal balance technology to temperature control of the key points of the machine structure, this study attempts to use small cooling water blocks for temperature control on the beam. The study based on the multiple physical coupled thermal displacement model established, the temperature value of the measured point and the corresponding cutting point thermal displacement input neural network are used for learning and training, and a neural network model for effectively predicting the temperature variation and thermal deformation of the machine structure is established respectively. Through the neural network model, multiple cooling water blocks are placed on the beam area of machine tools, adjust the cooling point parameters of multiple cooling water blocks to control the temperature distribution of the key structural positions of the machine, and then achieve the control of the thermal displacement of the cutting point and the bending degree of the beam.
The temperature of the beam is unevenly distributed due to the change of the ambient temperature was observed from the side-mounted model, which causes the thermal displacement of the x-axis of the tool tip to change the most. Use fan and cooling water block to improve the x-axis of the tool tip point and the bending degree of the beam. The Box-in-box model is also caused by the variation of the ambient temperature of the beam, which makes the temperature distribution of the beam structure uneven, resulting in the largest thermal displacement change of the z-axis of the tool tip point. The cooling water block is used to improve the bending degree of the beam, and it is easier to improve the z-axis thermal displacement of the tool tip point under compensation. The follow-up verification experiment was carried out on the side-mounted model, and the parameters obtained by the simulation were improved. In the fan experiment, the x-axis thermal displacement amount of the tool tip point was improved by about 10%, and the cooling water block was used to improve the x-axis thermal displacement amount of the tool tip point about 45%.
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SU, Po-Chuan, and 蘇保全. "Intermittent process measurement and statistical process analysis of a free-form surface by integrating a MP700 touch trigger probe with a CNC machining center." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/55796178686337893876.
Full textAbstract:
碩士<br>國立臺灣科技大學<br>機械工程系<br>94<br>The objective of this study is to develop an intermittent process measurement system by integrating a MP700 touch trigger probe system with a machining center to measure a workpiece containing freeform surface and regular geometric features and to do the statistical process control analysis. The whole measuring system consisting of a personal computer, a CNC machining center controller, a RENISHAW MP700 touch probe system was integrated information-technically. The measuring uncertainty of the MP700 touch trigger probe system integrated with the machining center was about 3 um based on the investigation of a standard ball. Measuring software was also developed to simulate the measuring path, prevent collision, generate the corresponding measuring NC codes and calculate the process capability indices, such as the overall capability index ( ), the worst-case capability index ( ) and the capability of accuracy ( ).
To evaluate the performance of the developed measuring system a carrier combined with free form surface and regular geometric features referred to in the ISO 10791-7 cutting test standard was designed, manufactured and inspected. The measuring results of this carrier were verified through a coordinate measuring machine with satisfactory result. According to the measuring results, the developed hybrid measuring system was successfully and effectively used to carry out the intermittent process measurement on the machining center to measure the test carrier and a mouse mould cavity.
The process capability indices, namely the , , , for each of the regular geometric features and freeform surface feature referred to in the ISO 10791-7 cutting test standards could be determined by the developed measuring software. The process capability of the used machine tool was quite good and stable based on the measurement results.
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Lee, Pay-Lin, and 李培霖. "Integration of the TS740 Touch Trigger Probe and the LK-G80 Reflective Distant Sensor on a Five-Axis CNC Machining Center for In-process Measurement." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/d47576.
Full textAbstract:
碩士<br>國立臺灣科技大學<br>機械工程系<br>107<br>This study mainly focuses on the TS740 touch trigger probe and LK-G80 reflective distant sensors integrated on five-axis CNC machine with Heidenhain controller for in-process measurement, and investigation on the geometric error and position error of the measurement on the machine. After verifying the accuracy of the measurement, the developed system can be used to measure objects of irregular geometry and regular geometry, and is suitable for the comprehensive measurement of a workpiece on 5-axis CNC machines.
By integrating the probe via software and hardware with a 5-axis CNC machine, and a set of measurement data analysis program has been written in MATLAB software. The developed program can be analyze the coordinate data, to obtain the geometric error or position error. An artefact combining the ISO cutting test piece and the free-form surface was used as measurement targets in this study. Concerning the measuring path configuration, the non-contact measurement device used the positive Z-direction measurement configuration and the contact measurement device used the surface normal vector measurement configuration.
This study compared the CMM measurement and the in-process measurement for error comparison analysis. The maximum error for the freeform surface was 0.0485 mm, and the maximum error for the geometrical tolerance of the regular shape measurement was follows: straightness 0.00406 mm, flatness 0.00068 mm, roundness 0.00538 mm and sphereness 0.03749 mm. Base on the measurement result, it showed that the measurement system was with good accuracy to carry out the in-process measurement.