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Tesi sul tema "Machine tools testing"
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1
Fontanive, Fernanda. "Análise da influência dos parâmetros de processo no fresamento de Inconel 718 sobre o desgaste e a qualidade superficial". reponame:Repositório Institucional da UCS, 2018. https://repositorio.ucs.br/handle/11338/3661.
Testo completo
2
Woodward, A. T. "The testing of asynchronous sequential machines". Thesis, Cardiff University, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.354749.
Testo completo
3
Žák, Zdeněk. "Vliv konvenčních kompenzací na volumetrickou přesnost obráběcího stroje". Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2016. http://www.nusl.cz/ntk/nusl-241873.
Testo completoAbstract (sommario):
This thesis solves the impact of conventional compensation to the volumetric accuracy of the CNC machine. It is therefore a practical research work, where are in the theoretical introduction mentioned requirements for machine tools, the types of errors that can occur on three-axis kinematics, compensation for the control system Siemens Sinumerik 840D sl and devices by means of which are these compensation under the work formed and subsequently verified. In this work can be seen the measured values and graphs from each measurements, a detailed analysis of the results and drawing conclusions from these results.
4
Lee, Dai Gil. "Manufacturing and testing of composite machine tool structures". Thesis, Massachusetts Institute of Technology, 1985. http://hdl.handle.net/1721.1/15265.
Testo completoAbstract (sommario):
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1985.MICROFICHE COPY AVAILABLE IN ARCHIVES AND ENGINEERING.
Vita.
Includes bibliographical references.
by Dai Gil Lee.
Ph.D.
5
Bhatia, Sanjay. "Software tools for computer-controlled fatigue testing". Thesis, Virginia Tech, 1986. http://hdl.handle.net/10919/45749.
Testo completoAbstract (sommario):
Past efforts at implementing Load Spectrum Generation and Neuber Control have centered around minicomputers and analog circuits. The use of a personal computer to implement the tasks is presented. On implementation of the load Spectrum Generation software, the response of the Materials Testing System was investigated for distortion and attenuation. In particular, the effect of the resolution of the waveform on the test system response was noted. There was negligible attenuation for full scale frequencies of up to 20 Hz. Greater waveform resolution was required at lower frequencies than at higher frequencies. On implementation of the Neuber Control program, the accuracy obtained at the Neuber hyperbolas was noted. Better accuracy was obtained at ramp frequencies below 0.1 Hz.
Based on the results obtained after implementing the Load Spectrum Generator program and the Neuber Control program, the performance of the personal computer in controlling fatigue tests is evaluated. Cost effectiveness and versatility favor the use of a personal computer for the control of fatigue tests.Master of Science
6
Forsgren, Robert, e Vasquez Erik Petersson. "REGTEST - an Automatic & Adaptive GUI Regression Testing Tool". Thesis, Linnéuniversitetet, Institutionen för datavetenskap (DV), 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-75152.
Testo completoAbstract (sommario):
Software testing is something that is very common and is done to increase the quality of and confidence in a software. In this report, an idea is proposed to create a software for GUI regression testing which uses image recognition to perform steps from test cases. The problem that exists with such a solution is that if a GUI has had changes made to it, then many test cases might break. For this reason, REGTEST was created which is a GUI regression testing tool that is able to handle one type of change that has been made to the GUI component, such as a change in color, shape, location or text. This type of solution is interesting because setting up tests with such a tool can be very fast and easy, but one previously big drawback of using image recognition for GUI testing is that it has not been able to handle changes well. It can be compared to tools that use IDs to perform a test where the actual visualization of a GUI component does not matter; It only matters that the ID stays the same; however, when using such tools, it either requires underlying knowledge of the GUI component naming conventions or the use of tools which automatically constructs XPath queries for the components. To verify that REGTEST can work as well as existing tools a comparison was made against two professional tools called Ranorex and Kantu. In those tests, REGTEST proved very successful and performed close to, or better than the other software.
7
Niu, Caotan, e 牛草坛. "A study of tool life and machinability parameters in high speed milling of hardened die steels". Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2007. http://hub.hku.hk/bib/B39557170.
Testo completo
8
Dvořák, David. "Testování a analýza protahovacího stroje". Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2020. http://www.nusl.cz/ntk/nusl-417102.
Testo completoAbstract (sommario):
This master's thesis deals with the broaching technology. Theoretical part includes the essay about the technology, tools and machines used for broaching. Theoretical part also describes the analysis of the broaching machine testing. Practical part is focused on the collecting, comparing and analysis of the data. These data have been collected during and after the broaching process. The supplier of the new analysed broaching machine is Stenhoj Hydraulik and the older machine has been made by Arpini. The measurements show that the increased number of broached pieces influence the cutting force and the quality of the surface due to wear of the tool which has been also monitored. The measuring dimension through the ball is almost constant. In the conclusion we evaluated the economical aspect of the results.
9
Dvořáček, Jan. "Testování nástrojů pro víceosé frézování na obráběcích centrech". Doctoral thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2017. http://www.nusl.cz/ntk/nusl-256571.
Testo completoAbstract (sommario):
The thesis is focused on testing of the cutting tools for machining on five axis machine tools and possibility of implementation of designed experiments in this area. The theoretical section focuses attention on analysis of specific features during five axis machining, including chip cross section and particularity of tool testing under high speed cutting conditions with consideration of dynamic stability of cutting tools. In the thesis force loading of the tool is discussed as well as its measurement process, considering force development caused by tool wear and data analysis. Description of designed experiment and its application to the area of tool testing is included as well. All theoretical predictions are followed by experimental verifying by extensive number of experimental tests, including evaluation of cutting tool condition, influence of hard coatings on cutting power of the tools, etc. For each of testing conditions are designed specific methods of processing of gathered data as well as evaluation of power of the cutting tools. Gathered data were processed by means of statistical evaluation and by statistical methods of designed experiments. The thesis contains also the extensive number of records and analysis, documented by means of light microscopy as well as electron microscopy.
10
方子元. "A Multi-single-axis Contouring Testing Device for Machine Tools". Thesis, 1997. http://ndltd.ncl.edu.tw/handle/26380764286265213605.
Testo completoAbstract (sommario):
碩士國立成功大學
機械工程學系
85
The purpose of this thesis is to study a new contouring system for CNC machine tools. The system, which uses the tooling taser and photo diode of position sensor detector, is different form the traditional telescope magnetic Ball Bar system. The system is employed to obtain the contouring error in each of two single axises and these two error components also can be integrated as a radial error such as the error obtained by the Ball Bar system. The work of employing the multi-single axis contouring system includes the displacement calibration of the PSDs, the setting-up of the PSDs mounted on the table, the lay out of the contouring path, the method deciding the start point and the end point in a contouring test, the intergration of the circularity and the research of contouring error of two single axis in the contouring test. First, in the tesis the error of the CNC machine and other traditional contouring systems are introduced. Then, the software and the hardware of the system are described. The system is employed to test the CNC machine. At last, the analysis of the test results and some discussions and suggestions are provided in this system.
11
Chen, Ching-Yin, e 陳慶盈. "The Dynamic Analysis and Testing of Feed Drive for Machine Tools". Thesis, 2000. http://ndltd.ncl.edu.tw/handle/18940518441713574583.
Testo completoAbstract (sommario):
碩士大葉大學
機械工程研究所
88
The feed drive system of a machine tool includes the feed mechanism and a NC controller. The feed drive system has large effect on the performance of high speed machine tools. In order to get the enough accuracy of a high speed feed drive system, we must increase the system response and the motion accuracy. To fulfill these requirements, the control system should be reasonably designed. The driving elements and the operating parameters should also be properly determined. In this study, we proposed a measurement technology by using model testing and IBN-TOOLS signal measurement software which is designed by SIEMENS. First of all, we tried to get the equation of motion for feed drive system from Newton’s low. In order to get the correct transfer function of the system. we also use system identification to analyze the table dynamic response which is caused by the movement of a machine tool. We also proved it by the measurement value. Firstly, we find that the system inertia must correspond to the motor inertia,and the system dynamic properties will be better if both of then are in good operating condition. Secondly, we used the properties of frequence pesponse corresponding to system identification. Then we found the main element which influences the system dynamic properties by adjusting the parameters. Finally we can improve the model by comparing the mathematic model with experimental values.
12
詹均瑞. "Development and Verification for Experiment Method of Modal Testing in Machine Tools". Thesis, 2016. http://ndltd.ncl.edu.tw/handle/yyq864.
Testo completo
13
Scheffer, Cornelius. "Monitoring of tool wear in turning operations using vibration measurements". Diss., 2000. http://hdl.handle.net/2263/30483.
Testo completoAbstract (sommario):
This study investigates the use of vibration and strain measurements on machine tools in order to identify the propagating wear of the selected tools. Two case studies are considered, one of which was conducted in the plant of a South African piston manufacturer. The purpose of the ftrst case study was to investigate the feasibility of vibration monitoring to identify tool wear, before attempting to implement a monitoring system in the manufacturing plant. During this case study, data from a turning process was recorded using two accelerometers coupled to a PL202 real time FFT analyser. Features indicative of tool wear were extracted from the sensor signals, and then used as inputs to a Self-Organising Map (SOM). The SOM is a type of neural network based on unsupervised learning, and can be used to classify the input data into regions corresponding to new and worn tools. It was also shown that the SOM can also be used very efficiently with discrete variables. One of the main contributions of the second case study was the fact that a unique type of tool was investigated, namely a synthetic diamond tool specifically used for the manufacturing of aluminium pistons. Data from the manufacturing of pistons was recorded with two piezoelectric strain sensors and a single accelerometer, all coupled to a DSPT Siglab analyser. A large number of features indicative of tool wear were automatically extracted from different parts of the original signals. These included features from time and frequency domain data, time series model coefficients as features and features extracted from wavelet packet analysis. A correlation coefficient approach was used to auto-lJUltically select the best features indicative of the progressive wear of the diamond tools. The SOM was once again used to identify the tool state. Some of the advantages of using different map sizes on the SOM were also demonstrated. A near 100% correct classification of the tool wear data was obtained by training the SOM with two independent data sets, and testing it with a third independent data set. It was also shown that the monitoring strategy proposed in the second case study can be fully automated and can be implemented on-line if the manufacturer wishes to. Some of the contributions of this study are the use of the SOM for tool wear classification, and conclusions regarding the wear modes of the synthetic diamond tools.Dissertation (M Eng (Mechanical Engineering))--University of Pretoria, 2006.
Mechanical and Aeronautical Engineering
unrestricted
14
Po-YiLee e 李博議. "Desgin of Cutting Performance Testing Standard of A Type Five-Axis Machine Tools and Mill-Turn Muti-Tasking Machines". Thesis, 2013. http://ndltd.ncl.edu.tw/handle/66264368003580856636.
Testo completoAbstract (sommario):
碩士國立成功大學
製造資訊與系統研究所碩博士班
101
Recently, most five axis machine tool of structural analysis and laser measurement researches are correcting statically. Some errors occur and are unable to find out at first during actual cutting situation.For example, error conditions such as cutter heating, vibration and backlash are unable to find out for adjustment due to differ of workpieces. For these reasons, however, there are no enough researches focus on direct cutting method for analyzing workpiece errors and estimating errors sources of five axis machine tools in the academic researches. Therefore, based in cutting test standard of NAS 979, ISO 10791 international cutting standards and cutting machines of Type A five axis machine tools and mill-turn multi-tasking machines. According to error measurement results of the pyramid-shaped and the cylinder-shaped, design and establish the motion errors analysis model. The main error analysis is focus on the pyramid-shaped workpiece, and use its adventage condition to estimate the 14 error sources, including five items of positioning error of X, Y, Z, B and C axis, six items of straightness error of horizontal and vertical component of X, Y, Z axis, three items of perpendicularity error of X-Y axis, Y-Z axis, Z-X axis. Clarify machine mistake according to measurement results and motion error method for adjustment and compentation.
15
Yi-JhenHsieh e 謝宜真. "Design of Cutting Performance Testing Standard for B and C Type Five-Axis Machine Tools". Thesis, 2013. http://ndltd.ncl.edu.tw/handle/8xm34g.
Testo completoAbstract (sommario):
碩士國立成功大學
製造資訊與系統研究所碩博士班
101
The machining performance of five-axis machine tools is commonly examined by the specifications of National Aerospace Standards (NAS) 979 or International Organization for Standardization (ISO) 10791. Hower, the cutting conditions for five-axis machine tools, which have not been defined thoroughly, would cause problems, such as the test piece can also be used for machining in the three-axis or four-axis machine tools leading to poor machining evaluation performance. In order to improve the five-axis machine tool machining test techniques, this study designs a set of complete cutting processes in direct cutting test method for examining five-axis machine tools performance. The cylindrical test piece and the pyramid test piece are designed with novel cutting parameter and patterns. One of the cylindrical test piece consists of features, which include the five-axis machine tools simultaneous machining patterns. The positioning errors can be clearly evaluated on the pyramid test piece by using measured location. Finished test pieces are measured using Zeiss Coordinate Measuring Machine (CMM) and this research also presents a complete cutting performance for B and C type five-axis machine tools.
16
Scheffer, Cornelius. "Development of a wear monitoring system for turning tools using artificial intelligence". Thesis, 2003. http://hdl.handle.net/2263/28640.
Testo completoAbstract (sommario):
Please read the abstract (Summary) in the 00front part of this documentThesis (PhD (Mechanical Engineering))--University of Pretoria, 2006.
Mechanical and Aeronautical Engineering
unrestricted
17
Considine, Breandan. "Programming tools for intelligent systems". Thesis, 2020. http://hdl.handle.net/1866/24310.
Testo completoAbstract (sommario):
Les outils de programmation sont des programmes informatiques qui aident les humains à programmer des ordinateurs. Les outils sont de toutes formes et tailles, par exemple les éditeurs, les compilateurs, les débogueurs et les profileurs. Chacun de ces outils facilite une tâche principale dans le flux de travail de programmation qui consomme des ressources cognitives lorsqu’il est effectué manuellement. Dans cette thèse, nous explorons plusieurs outils qui facilitent le processus de construction de systèmes intelligents et qui réduisent l’effort cognitif requis pour concevoir, développer, tester et déployer des systèmes logiciels intelligents. Tout d’abord, nous introduisons un environnement de développement intégré (EDI) pour la programmation d’applications Robot Operating System (ROS), appelé Hatchery (Chapter 2). Deuxièmement, nous décrivons Kotlin∇, un système de langage et de type pour la programmation différenciable, un paradigme émergent dans l’apprentissage automatique (Chapter 3). Troisièmement, nous proposons un nouvel algorithme pour tester automatiquement les programmes différenciables, en nous inspirant des techniques de tests contradictoires et métamorphiques (Chapter 4), et démontrons son efficacité empirique dans le cadre de la régression. Quatrièmement, nous explorons une infrastructure de conteneurs basée sur Docker, qui permet un déploiement reproductible des applications ROS sur la plateforme Duckietown (Chapter 5). Enfin, nous réfléchissons à l’état actuel des outils de programmation pour ces applications et spéculons à quoi pourrait ressembler la programmation de systèmes intelligents à l’avenir (Chapter 6).Programming tools are computer programs which help humans program computers. Tools come in all shapes and forms, from editors and compilers to debuggers and profilers. Each of these tools facilitates a core task in the programming workflow which consumes cognitive resources when performed manually. In this thesis, we explore several tools that facilitate the process of building intelligent systems, and which reduce the cognitive effort required to design, develop, test and deploy intelligent software systems. First, we introduce an integrated development environment (IDE) for programming Robot Operating System (ROS) applications, called Hatchery (Chapter 2). Second, we describe Kotlin∇, a language and type system for differentiable programming, an emerging paradigm in machine learning (Chapter 3). Third, we propose a new algorithm for automatically testing differentiable programs, drawing inspiration from techniques in adversarial and metamorphic testing (Chapter 4), and demonstrate its empirical efficiency in the regression setting. Fourth, we explore a container infrastructure based on Docker, which enables reproducible deployment of ROS applications on the Duckietown platform (Chapter 5). Finally, we reflect on the current state of programming tools for these applications and speculate what intelligent systems programming might look like in the future (Chapter 6).
18
Ho, Frank, e 何子豪. "Evaluation and Analysis of Machine Tool EMI/EMC On-Site Testing". Thesis, 2006. http://ndltd.ncl.edu.tw/handle/57297579207798757511.
Testo completoAbstract (sommario):
碩士大葉大學
電信工程學系碩士在職專班
94
Taiwan machine tool production in 2004 has raised to the amount NT$96,500 million owing to the demand Mainland China market. This is the highest amount over the recent years and in turn pushes Taiwan global rank to fifth position. However, the design, research and development of industrial mechanical equipment are facing the same problem. These problems at hand, are designing different kind of electronic equipment compatible on one machine functioning properly simultaneously without compromising the individual efficiency as well as interfering with the normal function of other electronic elements and the question of electromagnetic compatibility (EMC). This thesis will discuss the variation of RE measurement in different sites between OATS and manufacturing factory. The principle is to build a standard signal source to generate a broadband interference, then to measure the interference in OATS and manufacturing factory in order to analyze the deviation between two sites. This method also presented some statistical data for calculating a very useful correction factor which can correct the data of RE measurement in situ. After correcting, the measurement inaccuracy can be reduced from 19.25dB to 4dB.
19
Fan, Guang-Yi, e 范光儀. "Dynamic Structural Characteristic Analysis, Testing and Improved Design of the CNC Machine Tool". Thesis, 2012. http://ndltd.ncl.edu.tw/handle/m3sm85.
Testo completoAbstract (sommario):
碩士國立虎尾科技大學
機械設計工程研究所
100
This thesis mainly discusses a different types of the dynamic characteristics of the machine tool structure, application of Experimental Modal Analysis and Finite Element Method to carry out the structure of the system dynamics analysis, but for the increasingly complex structure of the machine tool, connection type for whole dynamic structure characteristics of the two structural elements have a significant impact, this article would use the ANSYS Finite Element Method, two types of machines about architecture of the hard track and tracks are finite element model, theoretical analysis of the simulation of structural systems, investigate it''s natural frequencies, mode shapes and interface stiffness etc. and through the Mechanism analysis software “RecurDyn” to solve the rigid-bod and flexible-body analysis, inertial vibration generated in the simulation of the structure moves for the dynamic effects of the base、column and contact stress etc. and then the application of Experimental Modal Analysis, using the LDS spectrum analyzer, measuring spindle head produce frequency response function at the actual operation processing, and than used the ME''s cope post-processing software obtained the actual structure of the modal frequencies, mode shapes, etc. to proof and evaluate the modal parameters, finally, using the topology optimization analysis to improvement the structural design, to use as reference of the modifications and design in the future.