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1
Kutlu, Asim. "Design and development of a lathe spindle." Thesis, KTH, Maskinkonstruktion (Inst.), 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-187477.
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Verktygsmaskiner möjliggör tillverkning av materiekroppar med olika form. Svarvar är de vanligaste maskinerna för att bearbeta runda detaljer. Man kan säga att en svarvspindeln möjliggör hela skärprocessen och att den därför är den viktigaste komponenten i en svarv. En svarvaxel, eller en spindel, bearbetar det roterande ämnet med ett stationärt skärverktyg, och materialet tas bort vid skärverktygets kontakt med ämnet.Det här arbetet syftar till att konstruera en spindel som uppfyller en given kravspecifikation. Specifikationen innehåller prestandakrav, som rotationshastighet och kraft, geometri och dimensionskrav, som storlek och håldiameter, samt vilka komponenttyper som ska användas, som t.ex. motorn.I enlighet medprestandakravet definieras maximalt lastscenario. Med givna svarvningsparametrar beräknas skärkraften på materialet vid dess kontakt med skärverktyget. En inbyggd motor som är tillräckligt kraftfull och uppfyller hastighets- och effektkraven väljs och en preliminär konstruktion skapas med valda lager, lagerordningar och axelmaterial.Beteendet av den preliminära spindelkonstruktionen, under påverkan av skärkrafter och rotation analyseras statiskt och dynamiskt med hjälp av FEM och analytiska modeller. Inom ett givet område optimeras avståndet mellan lagren, vilka utgör spindelns stöd.Genom verifikation och optimering av den preliminära konstruktionen skapas den slutliga detaljkonstruktionen. Slutkonstruktionen innefattar alla nödvändiga detaljer och viktiga krav beaktas och balanseras, som att vara tillverkningsbar och monterbar, tätningssystem, ett system för hastighetsmätning och lägesmätning, kabelvägar och andra nödvändiga punkter. I slutänden konstrueras en spindel som uppfyller den definierade kravspecifikationen.Machine tools enable the industry to shape almost any material by a variety of methods. Lathes are one of the most common machines to cut circular parts with precision and accuracy. And the spindle of a lathe can be entitled as the most critical mechanical component which makes the cutting process possible. A lathe spindle rotates the workpiece to be cut against a stationary rigid cutting tool, therefore removing material through the contact edge. In this thesis, a spindle is aimed to be designed which complies with a set of specifications defined. These specifications consists of performance requirements such as speed and power, dimensional constraints for space and bore diameter, and component types which must be used, such as for the motor.Based on the performance requirements, a maximum loading case with cutting parameters is defined. With these cutting parameters, cutting forces acting to the material from at the contact point with the cutting tool are calculated. A built-in motor with sufficient power and speed specifications is selected based on the maximum cutting forces and speed requirements. A preliminary design is made up by selecting bearings, bearing arrangements and shaft material.With static and dynamic analysis conducted on the preliminary design through analytical models and FEM, the behavior of the spindle is investigated separately under the cutting forces and during the rotation. Within an allowable range, optimization is made on the bearing span distances which are the support locations for the spindle.Following the verification and optimization of the preliminary design, the final detail design of the spindle is made. The final design includes the design of all the necessary parts, by taking the manufacturability, assemblability, sealing design, a system for speed and position measurements, cable paths and more necessary points into account. Ultimately, a spindle which meets the requirements and specifications successfully is designed as the expected outcome of this thesis.
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Usman, Irfan-ur-rab. "Rotary-axial spindle design for large load precision machining applications." Thesis, University of British Columbia, 2010. http://hdl.handle.net/2429/30163.
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Normal stress electromagnetic actuators can be used as both an axial bearing and an in-feed motor in precision machine tool applications that require only millimeter-range axial stroke, such as silicon wafer face grinding or meso-machining. The rotary cutting stage may be integrated with the axially-feeding stage in a rotary-axial architecture. This typology allows the use of independent rotary and axial actuators acting on a single moving mass, rather than an axial actuator moving an entire rotary motor assembly in the feed direction as in typical machine tool architectures. Non-collocated resonances are therefore minimized and thrust and radial stiffness is increased through the elimination of intermediate lateral and thrust bearings, and achievable closed loop positioning performance is improved.
This thesis presents the working principle, design, and analysis of radially-biased electromagnetic bearing/actuators for large load precision rotary-axial spindle applications, and the integration of such an actuator in a full scale prototype to be used as a silicon wafer face grinder. The experimental results indicate that the rotary-axial spindle with radially-biased thrust bearing/actuator is capable of achieving less than 7 nm resolution over a 1.5 mm axial stroke, a worst case load capacity of approximately 5000 N and a best case load capacity of over 8000 N, with rotary-axial coupling of less than 30 nm axial error at 3000 rpm.
3
Heo, Baekho. "Vibration reduction of rotating disk/spindle systems via structural design /." Thesis, Connect to this title online; UW restricted, 2004. http://hdl.handle.net/1773/7071.
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Pathak, Jay Prakash. "Design, assembly, and testing of an ultra-high-speed micro-milling spindle." [Gainesville, Fla.] : University of Florida, 2003. http://purl.fcla.edu/fcla/etd/UFE0002847.
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Zapletal, Jan. "Návrh vřetene obráběcího stroje." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2016. http://www.nusl.cz/ntk/nusl-241859.
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This master’s thesis deals with design of spindle for small three axis milling machine. The first part of this thesis includes research in milling spindles and overview of several spindles from different manufacturers. The second part deals with calculation of necessary parameters, design of spindle and subsequent simulation verification. This thesis also includes a 3D model of spindle, assembly drawing and four manufacturing drawings.
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Erturk, Alper. "Dynamic Modeling Of Spindle-tool Assemblies In Machining Centers." Master's thesis, METU, 2006. http://etd.lib.metu.edu.tr/upload/12607236/index.pdf.
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Regenerative chatter is a well-known machining problem that results in unstable cutting process, poor surface quality, reduced material removal rate and damage on the machine tool itself. Stability lobe diagrams supply stable depth of cut –
spindle speed combinations and they can be used to avoid chatter. The main requirement for generating the stability lobe diagrams is the system dynamics information at the tool tip in the form of point frequency response function (FRF). In this work, an analytical model that uses structural coupling and modification methods for modeling the dynamics of spindle-holder-tool assemblies in order to obtain the tool point FRF is presented. The resulting FRF obtained by the model can be used in the existing analytical and numerical models for constructing the stability lobe diagrams. Timoshenko beam theory is used in the model for improved accuracy and the results are compared with those of Euler-Bernoulli beam theory. The importance of using Timoshenko beam theory in the model is pointed out, and the circumstances, under which the theory being used in the model becomes more important, are explained. The model is verified by comparing the results obtained by the model with those of a reliable finite element software for a case study. The computational superiority in using the model developed against the finite element software is also demonstrated. Then, the model is used for studying the effects of bearing and contact dynamics at the spindle-holder and holder-tool interfaces on the tool point FRF. Based on the results of the effect analysis, a new approach is suggested for the identification of bearing and interface parameters from experimental measurements, which is demonstrated on a spindle-holder-tool assembly. The model is also employed for studying the effects of design and operational parameters on the tool point FRF, from the results of which, suggestions are made regarding the design of spindles and selection of operational parameters. Finally, it is experimentally demonstrated that the stability lobe diagram of an assembly can be predicted pretty accurately by using the model proposed, and furthermore the stability lobe diagram can be modified in a predictable manner for improving chatter stability.
7
Turk, Amanda C. (Amanda Christine). "Design and fabrication of a device to characterize spindle performance as a function of bearing preload." Thesis, Massachusetts Institute of Technology, 2012. http://hdl.handle.net/1721.1/75453.
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Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2012.This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.
Page 98 blank. Cataloged from student submitted PDF version of thesis.
Includes bibliographical references (p. 83-84).
This paper describes the design and fabrication of an apparatus to characterize the performance of lathe spindles as a function of spindle bearing preload. The apparatus will be used to assist undergraduate students enrolled in 2.72 in understanding mechanical design concepts. In order to assess spindle performance, the apparatus measures the radial stiffness, radial error motion, and running torque of a spindle at different preload levels. The data obtained using the apparatus can be used by students to select the optimal preload level for a spindle. The apparatus was designed as four subsystems (one for each measurement) that were integrated into a cohesive measurement system. The apparatus is designed to be as small, light, and user-friendly as possible, in order for students to use it effectively. The apparatus is capable of measuring bearing preload up to 10,000 lbs with a linearity of 0.05% and radial error motion with an accuracy of +/-0.00012 in. (3 [mu]m). It can measure the radial stiffness of the spindle for applied loads up to 500 lbs and running torque up to 443 in-lbs (50 N-m). The fabrication and assembly of the mechanical apparatus, as designed, were completed.
by Amanda C. Turk.
S.B.
8
Sedlák, Pavel. "Konstrukce multifunkčního obráběcího centra." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2011. http://www.nusl.cz/ntk/nusl-229854.
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This master thesis deals with the construction of multi-functional machining centre. The theoretical part describes the history of lathes, trends in production of lathes and individual machine parts. The practical part is the structural design of the spindle with positioning in the C axis, the second spindle (including drive in Z axis) and the turret (including drive in the X and Z axis). A 3-D model of the entire lathe assembly modeled in Autodesk Inventor 2010 is also included.
9
Wichert, Torsten. "Design and Construction Modifications of Switched Reluctance Machines." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2009. http://nbn-resolving.de/urn:nbn:de:bsz:14-ds-1235569858100-62518.
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Although the design principles of the Switched Reluctance Machines (SRMs) are available in different fragments in numerous bibliography positions, there no exists the complex design procedure of whole drive system taking into account the SR Machine, control system and supply device as well. The hybrid design method for SRM drives with application of new analytical calculation methods, finite element method and simulation models is proposed in this thesis. The calculation/design system is characterised by important effectivity and reliability. The new possibilities in analytical determination of saturation effects and core losses under various modes of control, including sensorless method, are also taken into account. The correctness of the proposed design algorithms are verified by laboratory tests made on three motor prototypes manufactured in industry for concrete application. This dissertation provides the elements indispensable for more accurate and complex analysis and design of drives with switch reluctance motors. The elements of electrical motor and control system design as well as the considerations on the choice of supply device and controller subsystems are jointed in the thesis for final receiving of the design tool for considered industrial drive system.
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Wichert, Torsten. "Design and Construction Modifications of Switched Reluctance Machines." Doctoral thesis, Technische Universität Warschau, 2008. https://slub.qucosa.de/id/qucosa%3A258.
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Although the design principles of the Switched Reluctance Machines (SRMs) are available in different fragments in numerous bibliography positions, there no exists the complex design procedure of whole drive system taking into account the SR Machine, control system and supply device as well. The hybrid design method for SRM drives with application of new analytical calculation methods, finite element method and simulation models is proposed in this thesis. The calculation/design system is characterised by important effectivity and reliability. The new possibilities in analytical determination of saturation effects and core losses under various modes of control, including sensorless method, are also taken into account. The correctness of the proposed design algorithms are verified by laboratory tests made on three motor prototypes manufactured in industry for concrete application. This dissertation provides the elements indispensable for more accurate and complex analysis and design of drives with switch reluctance motors. The elements of electrical motor and control system design as well as the considerations on the choice of supply device and controller subsystems are jointed in the thesis for final receiving of the design tool for considered industrial drive system.
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Nedbal, David. "Návrh manuální pravoúhlé frézovací hlavy určené pro technologické operace na středně těžkých obrobcích." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2018. http://www.nusl.cz/ntk/nusl-382413.
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This thesis deals with mechanical design of right-angle manual milling head for headstock of horizontal boring machine of Fermat production. The thesis includes research of milling head types, Fermat production heads, but also heads of competition companies with similar parameters like designed head. Design part of thesis is about describing used components of chosen solution. The thesis includes also technical report describing calculation of load spectrum from machining, design of gears, calculation of reactions in spindle bearings, spindle deformation and control of spindle bearings. The end of the thesis describes financial evaluation including also comparation with competitive milling heads with similar parameters.
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Svoboda, Ondřej. "Konstrukce pravoúhle prodloužené frézovací hlavy pro horizontální vyvrtávačku." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2014. http://www.nusl.cz/ntk/nusl-231164.
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This thesis deals with design of right-angled elongated milling head for horizontal boring machine of FERMAT production. The thesis includes a detailed research of milling heads, a description of the head´s basic components and certain commercially available head´s comparison. Design part is describe components description and the design. Calculations are focused on determinating of forces generated during machining, setting of loading spectrum and the power load calculating individual gears during machining. In the next part is calculation of the reactions in the spindle bearings included, the equivalent load and durability of spindle bearings, spindle deformation and spindle bearings optimum distance. The thesis also includes spindle strength calculation, horizontal and vertical shafts analysis, gears design with helical teeth and gear strength. The thesis describes the design of extended milling head and particular design nodes which is supplemented by the 3D model. In this thesis is also included a drawing of assembly and components.
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Kráčmar, Tomáš. "Konstrukce vřeten vícevřetenového soustružnického automatu." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2016. http://www.nusl.cz/ntk/nusl-241713.
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This master‘s thesis contains a design of multi-spindle automatic lathe spindles for the work of the rods maximum diameter of 7 mm. The work deals with a new concept of the drive spindle, where the spindles are driven by external asynchronous motor through the gears with internal teeth attached to the outside of the spindle drum instead of the current method of driven by central coaxial shaft. The thesis research of multi-spindle lathes including a description of the main nodes, design, strength calculations, bearing durability and a simulation model for simulation acceleration and load drives and spindles from the cutting process.
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Otradovský, Radek. "Návrh vyvrtávacího stroje na podélné a příčné vrtání dřevěných desek se stohovacím zařízením." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2019. http://www.nusl.cz/ntk/nusl-401063.
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The aim of this diploma thesis is design of the boring machine for longitudinal and transverse drilling of holes, which is primary intended for manufacture of furniture from wood materials. Concept of this machine is defined as last segment of production line, which is terminated by stacking container for transport dose. The aim of this thesis is create a variants of machine design and manipulating device and justify the choice of the optimal option. For own design is necessary to create a construction calculations.
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Mohamed, Ali, and Felix Kjäll. "Spindeln mellan teknik och människa : En studie om hur interaktionsdesigner beskriver sitt yrke." Thesis, Stockholms universitet, Pedagogiska institutionen, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-45253.
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In this bachelor thesis we have studied how interaction designers describe their profession. The research material is based on nine interviews with interaction designers. Questions cover areas such as interaction design tasks, what abilities they consider important, how they describe their relationship to the users, and cooperation with colleagues. We have analyzed the results using key terms such as habitus, field, and capital, as described by sociologist Pierre Bourdieu. The interviewees express humanistic views, and ask for more cooperation between interaction designers, as well as other people within the field of IT production. We suggest possible solutions, like design patterns, with the goal of sharing knowledge within the IT field.
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Tseng, Chaw-Wu. "Vibration of rotating-shaft design spindles with flexible bases /." Thesis, Connect to this title online; UW restricted, 2002. http://hdl.handle.net/1773/7129.
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Kovács, Zdeněk. "Návrh CNC frézky pro modelářské dílny." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2018. http://www.nusl.cz/ntk/nusl-382241.
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This diploma thesis deals with the design of a CNC milling machine for the puspose of modeling workshop. In the first part is carried out the search in the field of small CNC milling machines for better familiarization with this issue. The information obtained in the first part of the thesis is used for determination the parameters of the designed machine. The last part deals with the design and realization in the form of a 3D model.
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Benner, Nicole. "Explorations of the Spine." Thesis, Southern Illinois University at Edwardsville, 2016. http://pqdtopen.proquest.com/#viewpdf?dispub=10130722.
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Campbell, R. I., M. Lo-Sapio, and M. Martorelli. "Using haptic modelling for spinal implant design." Journal for New Generation Sciences, Vol 7, Issue 3: Central University of Technology, Free State, Bloemfontein, 2009. http://hdl.handle.net/11462/538.
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Published ArticleThe link from medical scan images through data manipulation to additive manufacturing is well established. Various types of software are used to deliver the required .STL file(s). Often, the data manipulation will require the generation of new shapes around existing geometry, e.g. an implant that will replace missing bone tissue. This paper reports exploratory work undertaken to assess the feasibility of using haptic modelling and "virtual sculpting" software to generate novel designs of vertebrae implants for correction of spinal curvature. .STL data of several vertebrae, originating from CT scans, was imported into the Freeform system from SensAble technologies. It was used to create immutable "bucks" around which the user "sculpted" three-dimensional implant geometries. It must be noted that the designs have not been medically assessed and were for demonstration purposes only. However, the process route followed did prove to be feasible and offered some particular advantages, e.g. a precise fit between the implant and the vertebra and the possibility of enabling the direct intervention of medics in the implant design process.
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Pavelka, Radomil. "Pohon vřeten pětivřetenového soustružnického automatu." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2014. http://www.nusl.cz/ntk/nusl-231522.
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The subject of the thesis is design of independent spindle drive for multi-spindle automatic lathe MORI-SAY TMZ 520 CNC manufactured by TAJMAC-ZPS. The thesis will introduce the representatives of manufacturing program of TAJMAC-ZPS multi-spindle automatic lathes division and there will be a brief description of their main constructional parts. The main objective of the thesis is an engineering design of testing device which will be bulit for verification of the correct drive concept. There is also many calculations and detailed description of the engineering design. The testing device is made for internal needs of TAJMAC-ZPS.
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De, Jongh Cornel. "Critical evaluation of predictive modelling of a cervical disc design." Thesis, Link to the online version, 2007. http://hdl.handle.net/10019/601.
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Ishii, Kohki. "Design and Stress Analysis of Dynamic Spinal Stabilizers." OpenSIUC, 2010. https://opensiuc.lib.siu.edu/theses/270.
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A dynamic lumbar spinal stabilizer with a helical machined spring element was created in the first stage. The stabilizer was built with 30 N/mm of axial stiffness because if the human body is moved to flexion and extension, this amount of a compressive and tensile load would be applied to the intervertebral disc. The stabilizer supports the loads instead of the disc. The stiffness was influenced by the number of coils, the thickness of coils, and length of the coil element. The stiffness can be determined by analytical equations or by finite element analysis (FE), such as ANSYS Workbench. In the second stage, the lumbar spine FE model was successfully constructed by using Autodesk Inventor 2010. There were three different analyzed models; (1) intact model, (2) fused model, and (3) dynamically stabilized model. This intact model is a simplified and basic model used for fused model and dynamically stabilized model. The range of motion (ROM) was the key term in this study. In other words, examination of each model was based on how much ROM was shown when the flexion, extension, and bending moments have been applied on the spine. The ROM of each model with three moments produced appropriate values compared to the references. The stress analysis is also important to optimize the design of the dynamic stabilizer. The maximum stress was 472 MPa on the stabilizer that is less than yield strength of Titanium alloy.
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Yeung, Chi-hung Wallace. "Urban spine in Wanchai : a social collector / connector /." Hong Kong : University of Hong Kong, 1997. http://sunzi.lib.hku.hk/hkuto/record.jsp?B25955342.
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Maeda, Osamu. "Expert spindle design system." Thesis, 2003. http://hdl.handle.net/2429/14534.
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Machine tool spindle is the most important mechanical component in removing metal during machining operations. The structural dynamics of the spindle are evaluated at the tool tip since it directly affects the material removal rate. Flexible spindles lead to unstable chatter vibrations, which can be avoided only by reducing the material removal rate. In addition, the spindle motor must have sufficient torque and power to overcome the cutting resistance of work materials to be machined. The spindles are currently designed based on accumulated experience, basic laws of machine design, and metal cutting mechanics. This thesis presents an expert spindle design system strategy which is based on the efficient utilization of past design experience, the laws of machine design and metal cutting dynamics. The configuration of the spindle is decided by identifying the work material, desired cutting conditions and most common tools which will be used on the machine tool. The spindle drive mechanism, drive motor, bearing types, and spindle shaft dimensions are selected based on the target application. The thesis provides a set of fuzzy design rules which lead to interactive and automatic design of spindle drive configurations. The structural dynamics of the spindle are automatically optimized by distributing the bearings along the spindle shaft. The proposed strategy is to iteratively predict the Frequency Response Function (FRF) of the spindle at the tool tip using the Finite Element Method (FEM) based on Timoshenko Beam elements. Predicted FRF of the spindle is integrated to the chatter vibration stability law which indicates whether the design would lead to chatter vibration free cutting operation at the desired speed and depth of cut. The bearing spacings are iteratively optimized without violating the design constraints of the spindle. The proposed expert system design is demonstrated by automatically designing several spindles which are found on industrial machine tools.
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Chen, Chih-Wei, and 陳志維. "Seek/Spindle Servo Design Using Embedded CPLD." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/18693548612488290177.
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碩士國立清華大學
動力機械工程學系
92
This thesis focuses on implementing a CPLD-based seek and spindle servo control system for a DVD-Player using design tool Quartus II. Experimental validation is based on the modification on PCBA and firmware of a on-the-shelf DVD-Player. In the design of Seek Controller, this thesis adopted the design of a Integrate-controller in velocity estimator module for a long-seek servo to reduce the tracking error between pre-specified velocity profile and estimated-velocity effectively. An Active Damper module and a Pseudo Central Servo module are both designed and realized using logic circuit on a CPLD to alleviate the vibratory motion of the pick-up-head during long seeking. Furthermore, the tracking error between estimated-velocity and velocity profile for a short-seek servo were also shown to be improved through experimental validation. As for spindle motor servo design, a track-jump flag signal is utilized to perform Bang-Bang Control that is adopted to adjust the motor rotational speed during long seek. Constant Angular Velocity (CAV) mode and Constant Linear Velocity (CLV) mode are integrated to build a single spindle motor control module to incorporate with long-seek servo. CAV mode and CLV mode are performed to show its feasibility. The experiment results showed that the pick-up-head can perform arbitrarily track-jump command, quite well. Lastly, the digital Phase-Locked Loop module also showed its feasibility on spindle motor rotational speed control through experiments.
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PURWANTO, WAWAN, and 王萬. "Study of Spindle Motor Parameter Design for Improving the Performance of High-Speed Spindle Motor." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/97872359568585600283.
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博士國立高雄第一科技大學
工學院工程科技博士班
105
High speed machining is a technology for drastically increasing productivity and reducing production cost which can have an effect on our life. The main fabrication issues of the spindle motors are high torque and efficiency. Generally, the performance of the spindle motor is largely determined by the value of the leakage reactance, which has a substantial influence on the flux linkage from the stator to the rotor. This dissertation focus an optimal design of stator parameters to improving breakdown (maximum) torque, efficiency, stator flux linkage, and reducing additional power loss and temperature rise of the spindle motor, and optimal design of the stator slot geometry to increasing starting performance and reducing starting current. The optimal designs were develop using response surface methodology (RSM), Hooke-Jeeves optimization, Taguchi method, and finite element method (FEM). In this study, a spindle motor performance estimate consist of breakdown torque, efficiency, flux linkage FEA, stator linkage flux and stator leakage analysis, the thermal design concept, additional power loss reduction strategy, starting performance analysis have been described. By using performance estimate, the key design parameter can be identified and design results can be obtained. Furthermore, we fabricated and tested a prototype spindle motor industrial design to validate the optimal design calculation results. The experimental results indicated that the optimal generates higher breakdown torque, efficiency, flux linkage, starting performances, lower temperature rise, additional power loss and starting current than does the current former spindle motor design. A comparison of the optimal design calculations and the prototype measurement results validated the accuracy of the proposed model. Overall, the percentage of error is approximately 8%.
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Wu, C. M., and 吳志民. "Optimum Spindle Design Combined with Cutter and Holder." Thesis, 1993. http://ndltd.ncl.edu.tw/handle/68895421036320156779.
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碩士淡江大學
機械工程研究所
81
This thesis presents the design model for optimizing the ma- chine tool spindle which connected the holder and cutter in bear- ing preloaded condition.The supports are simulated with nonlinear springs and the connections between cutter/holder and holder/ spindle with a tortional springs. The model are developed in fi- nite element programming which is applied to the formal optimiza- tion design process.The results of the CNC4400 spindle shows that considering the bearing preload in advanced can improve the per- formance of the formal design. It also shows that the presented model is more practical and better than the traditional design which neglect the holder and cutter effects.
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Vance, John. "Design of a three-spindle mulching lawn mower." 1996. http://catalog.hathitrust.org/api/volumes/oclc/36270116.html.
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Thesis (M.S.)--University of Wisconsin--Madison, 1996.Typescript. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaf 69).
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Chang, Chun-Hsien, and 張濬顯. "Design and Test of Hydrostatic Built-in Spindle." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/8x8edv.
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Kuo, Tsai-Chin, and 郭再欽. "Design and development of the Horizontal Hydrostatic Spindle." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/272v27.
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碩士國立彰化師範大學
機電工程學系
106
The purpose of this paper is to design and develop a set of horizontal spindle for the hydraulic lathes. The main specifications include a system stiffness of 877.93 N/μm and a system flow of 4.31 L/min. Firstly, the design specification of the hydrostatic spindle is determined according to the system stiffness of a composite roller and ball lathe spindle. Secondly, a complete hydrostatic spindle design process is established. At beginning the types of oil chamber and the orifices are selected. Then, using the characteristics of the thrust and radial bearings the system stiffness of the hydrostatic spindle is obtained. Finally, the 2D machining draws of the hydrostatic spindle are finished. In this paper the effect of temperature on changes in oil properties are analyzed too. In addition, the design method is also proposed for the "unloading mechanism" in the spindle drive mechanism. These presented methods can be used as a reference for future spindle design. Keywords: hydrostatic spindle, oil chamber, orifice, unloading mechanism, oil supply system, oil cooling system.
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TAVERNARI, MIRCO. "Ricerca e sviluppo di metodologie e strumenti a supporto della progettazione di elettromandrini e di mandrini ad aria compressa." Doctoral thesis, 2009. http://hdl.handle.net/2158/590124.
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Fang, Sy Suenn, and 方思巽. "Analysis and Design of the Bearings for Aerostatic Spindle." Thesis, 2000. http://ndltd.ncl.edu.tw/handle/95005025170188674674.
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碩士國立中正大學
機械系
88
The purpose of this paper is to analyze the static and dynamic characteristics of the air bearing. Including the without speed of the pure static pressure state and under the high speed to produce the dynamic effect with the performance influence of the journal air bearing. In the theoretical analysis，To make use of Finite Difference Method to solve the Reynolds equation in order to calculate the bearing system was also developed to perform the clearance variable、orifice flow rate、pressure distribution、load capacity、stiffness of the air bearing.In the practical design，In accordance to the Westwind company for the air bearing of the England with design.To operate in coordination the orifice restrictor design for experience formula of the Dr. Ken. J.Stout to Design and runout test of the journal air bearings. The origin research to proceed of the main work： (1)To establish the numerical analysis of the Finite Difference Method for the journal air bearings. (2)Analyzing static and dynamic characteristics with the performance influence of the journal air bearings. (3)Designing of The orifice restrictor and elect material of the bearings. (4)The runout and natural frequency test of the bearings. Keyword：Aerostatics bearing、Hybrid bearing、Finite Difference Metho
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Tsai, I.-Chang, and 蔡一昌. "Compensation Design for Dynamic Balance of High-Speed Spindle." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/61285873263751136850.
Full textAbstract:
碩士國立中興大學
機械工程學系
92
Abstract This article is design for rotor in accordance with non- balanced, by rotor geometry Structure and mass distribution to probe its non-balanced condition, applied analyze calculating method，and come out with the structure of Rotor end surface for indemnify design. This article is use 3D painting soft ware Solidworks in order to get the date of rotor ‘s mass center displacement and mass moment of inertia, after the analyzing comes to the best balanced relation of drill hole position and Drill hole depth, take the result as a theory of the rotor compensates；and it is also take the gear’s spindle for example. We get the date by the experimental method to measure the vibration and balance design. We discovered to forecast that the bigger rotor ‘s mass center displacement and mass moment of inertia ,the stronger bearing response strut strength, and the actual rotor vibrated condition is more furious. It can effectively reduce the problems of vibration when Drill hole in the proper depth . It is certainly decrease rotor ‘s mass center displacement and mass moment of inertia.
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LI, DONG-YE, and 李東曄. "Shear Accelerometers Design and Application on High Speed Spindle." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/eq778f.
Full textAbstract:
碩士南臺科技大學
機械工程系
107
Nowadays, Industry 4.0 combines with the development of the mechanical machine industry. For the diagnosis of machine tool vibration has become one of the main research topics. So the forerunner of the lab use the piezoelectric materials of shearing deformation type, To design a accelerometer for measure the machine tool chatter or the machine vibration. But with the progress of science and technology and the improvement of the performance of tool machines, higher speed machining stimulates more frequent vibration signals, Maybe it will exceed the accelerometer can use the range, Given the above considerations, this research will be based on the forerunner design the of accelerometer. Design an accelerometer that is more suitable for the high-speed spindle of the tool machine. In this paper, we will first discuss the performance of the annular shear accelerometer produced by the forerunner. Improve the defects of its original model. Use the theoretical formula and ANSYS finite element software to further optimize the model. And discuss the difference between the theoretical analytical solution and the data analyzed by ANSYS. Finally, it is placed on the surface of high-speed spindle with the reference accelerometer for measurement and comparison. But in order to be able to operate at high speed spindle for a long time. In order to avoid the base bending effect caused by thermal deformation. And the overall sensitivity and available bandwidth of the lifting accelerometer. And put forward another delta shear design. By 3 piece of the piezoelectric materials to increase output voltage. And use a high-strength clamping ring to fix the overall structure to achieve a higher resonance frequency. The final again by ANSYS finite element software to further narrow model. The final experimental results show that delta shear accelerometer the ± 3dB frequency response more high than annular accelerometer.
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Chen, Kai-Wei, and 陳凱威. "Effect of Misalignment on Spindle Vibration of High Speed Spindle and a New Design of Active Balancing Mechanism." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/64950570205869198034.
Full textAbstract:
碩士國立清華大學
動力機械工程學系
92
This thesis mainly discusses the effect of misalignment on the rotor system, and also proposes a generative mechanism of the active balancing balancer. The content can be divided into three parts. In the beginning, we use Bernoulli-Euler beam theory as the foundation of the entire research to model the rotor system. After this, we discuss the difference on the dynamics of the rotor when the bearing supports are considered as the rigid or linear elastic. Besides, through the establishment of the theory, the result shows the effect of misalignment on the dynamic of the rotor is the additional static deflection when the stiffness of the bearing support is considered as linear elastic. This phenomenon also shows the effect of the misalignment on the rotor dynamic is mainly due to the nonlinear bearing stiffness and verifies the importance of the establishment of the nonlinear bearing stiffness model. The another discovery is that the whirling frequency of an continuous rotor on the linear bearing stiffness supports not only have the relation to the rotating speed of the rotor ,but also the different parts of the rotor. It means the whirling frequency of the middle part of the rotor will be different from the end part under the same rotating speed. The secondary part is the modeling of the angular contact ball bearing and derivation of the stiffness matrix. In this part we use the method proposed by De Mul et al, using the Hertz contact theory to describe the contact phenomenon happening in the angular ball bearing. And find the stiffness matrix in all direction. It can be used as the input when we want to analyze dynamic of the rotor system equipped with the ball bearings as the supports in the future. In the last part, we introduce many kinds of the online active balancing system on the market, and propose a new concept of the online active balancing system adopt the supersonic motor as the driving mechanism.
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Ku, Ming-Chi, and 古明淇. "Design and Implementation of A Single-Phase Spindle Motot Drive." Thesis, 2001. http://ndltd.ncl.edu.tw/handle/21774705733296027620.
Full textAbstract:
碩士國立臺北科技大學
機電整合研究所
89
The objective of this thesis is to investigate the basic features of a single-phase spindle motor and to design the associated speed drive. First, the servo systems of CD-ROM are introduced. A servo system of CD-ROM consists of several Sub-Systems, which include spindle, radial and focus subsystem. And then, a dynamic signal analyzer, HP35670A, is used to measure the parameters of the spindle motor, and thereby implement the closed-loop system using a Digital Signal Processor, TMS320CF240, as the controlled. The feedback signal of the spindle motor is achieved by TMS320CF240. The switching signal in personal computer is downloaded via RS-232 to TMS320CF240 to drive the spindle motor. And then we use the spindle motor parameter measured previously to design a PI controller. Experimental results are presented that the speed error is within 1rpm.
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Lin, Meng-wei, and 林孟瑋. "Design, Analysis and Validation of a Spindle for MOCVD Process." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/z9vkax.
Full textAbstract:
碩士國立中央大學
機械工程學系
104
The aim of the paper is to design and manufacture a spindle to apply in a chamber for MOCVD process and validate its performances experimentally. The spindle must be designed as stable and robust to fulfill the extreme requirements, such as high speed, high temperature and vacuum. The main topics of design include therefore the bearing supporting, the sealing and the cooling system. The bearing supporting in the study is selected as locating-floating arrangement. The located bearing is a set of angular contact ball bearings in back-to-back arrangement to increase the supporting span for enhancement of the shaft stiffness. A deep groove ball bearing is used for the floating bearing in order to share the radial load. In addition, a preload is applied to the bearings in order to increase the stability and the stiffness of the spindle and to reduce the run-out and vibration of the susceptor. A magnetic rotary feedthrough is used for vacuum sealing, which is located between the located bearings and the floating bear considering the stability of the spindle. Two kinds of cooling systems are applied in the spindle: housing cooling system and shaft cooling system. The housing cooling system is used to cool down the located bearings and the feedthrough. With consideration that the cooling efficiency of housing cooling is not enough, the shaft cooling system is added. In order to validate the design, a FEM analysis is conducted for both cooling system. The analysis results are also compared with the results from an experiment. In order to ensure the spindle applicable for MOCVD chamber, three function validation tests are initiated: temperature measurement of the spindle, run-out measurement of the susceptor and vibration measurement of the spindle. Three cooling conditions are considered in the temperature measurement: magnetic rotary feedthrough cooling, housing cooling and shaft cooling. The axial run-out of susceptor is measured to confirm this error will not affect MOCVD process. The vibration condition of the spindle is also measured by using pose of accelerometers to confirming the stability during operation. From the results of measured temperature, the cooling efficiency of shaft cooling is better than that of housing cooling. Comparing with the results from the experimental measurement, the results from the heat transfer FEA are in good agreement with the measured results. The max value of axial run-out is 0.113 mm and less than the required value of 0.15 mm. The max. measured acceleration of vibration is 0.136 g. And no significant impact on the spindle is expected. Based on the results, the spindle developed in this paper is applicable for MOCVD chamber.
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Wu, Chi-Wei, and 吳啟瑋. "A Study on the Computer-Aided Design of Spindle System." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/39205252225764891641.
Full textAbstract:
碩士國立高雄第一科技大學
機械與自動化工程研究所
99
The paper in the development of a high-speed spindle of computer-aided design system. Use of the system to help users correctly, quickly select the appropriate type of bearing, rated load, speed limit and other related factors, and calculate the stiffness of the size. The programming of the work platform is currently used very popularity of the Microsoft Visual Basic 2005 programming language written in Combined with an Access database, for the complexity of the bearing type and quantity models, empirical formula and calculation of some spindle-related production a design system, in addition to the development of the database data acquisition system, the issue and hope to develop a program that the system user-friendly interface. Therefore; this paper, the parametric and interactive dialog box, the advantages in addition to immediate results, reduce errors, but also can save tedious calculation time, and look-up table process of human resources to improve quality and efficiency. And developed in this paper through the application, users can shorten the finding suitable bearings, spindle design-related parameters of the time. Benchmarks to measure the rigidity in the spindle design, obtain a better result.
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Lai, Yan-chun, and 賴彥鈞. "Sleep Spindle Automatic Identification System Design Via Wavelet Fuzzy Method." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/40713062172591769642.
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碩士國立臺北教育大學
資訊科學系碩士班
98
In recent year, Sleep Medicine is a new field of the medical science. Especially, to analyze the sleep spindles is playing an important role of understanding the sleep disorders. Doctors can get many patients' physiology records through instruments. These records include electroencephalogram (EEG), electromyography (EMG), electro-oculogram (EOG), electrocardiogram (ECG), SaO2, body temperature and so on. The all-night electroencephalogram will include about 1,000 sleep spindles. Then doctors have to find out these sleep spindles from the records by eyes. The visual pattern detection of sleep spindles is time consuming and tedious. This thesis creates an algorithm to recognize the sleep spindles automatically. The first stage uses characteristic selection method to save the waves that meet the definition of sleep spindle. And then use wavelet fuzzy method to recognize the waves that are similar with the sleep spindle. The last stage uses interval processing to show up the exact position of sleep spindles.
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Lin, Chia-Yung, and 林家永. "The Spindle Motor Drive System Design for Woodworking Carving Machine." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/3yh945.
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碩士國立勤益科技大學
電機工程系
106
The object of this study is to develop a dsPIC30F4011 Micro Control Unit (MCU)-based Brushless DC Motor (BLDCM) drive system. The designed drive system and BLDCM are applied to a woodworking carving machine as the spindle motor. The proposed system uses the six-step square wave modulation to regulate the stator currents. The rotor position and shaft speed are detected by Hall sensors which are embedded in the motor. A speed PI controller is used to maintain the motor speed at the desired. The designed hardware system includes the main control board, power module board, and signal processing board. Isolations for digital and analog signals, high-side and low-side voltages are added to prevent form the noise interference. The drive system is designed to be operated at the speed range of 6000 rpm to 20000 rpm to fit the requirements for different materials process. Finally, the system is practically applied to the carving machine to verify its performance.
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Shih, Cheng-Hao, and 施澄昊. "Application of Thermo-Friendly Concept in Design of Hydrostatic Spindle." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/d73z92.
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碩士國立清華大學
動力機械工程學系
106
The thermal error happened in precision machines has a significant impact on machining accuracy. Among error sources of the experiment, this thesis confirmed that thermal error is the key factor affecting the accuracy of the hydrostatic bearing system. Therefore, this study introduces Thermo-Friendly Concept, according to Okuma, to solve the thermal error problem. In theory, this thesis first probes the function of the load capacity of the opposed pad hydrostatic bearing and the performance of stiffness. Secondly, this work searches the relevant literature to obtain the essential parameters, such as the oil-film thickness, land dimension, and flow rate. Most importantly, this study applies Thermo-Friendly Concept to the design of hydrostatic bearing system. By analyzing the heat sources of bearing system, this work can obtain the image of temperature field, and also receive thermal deformation by thermo-elastic model. This thesis conducts the experiment by using the existing vertical hydrostatic rotary bearing system. These experimental results compare the actual performance with the theoretical thermo-elastic model, and present a method to modify the model that satisfy the requirements. Finally, this study enhances the performance of hydrostatic bearing system, so better machining accuracy can be expected.
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Chen, Cheng-Yuan, and 陳政原. "Design of 5-DOF High Speed Spindle Supported by Magnetic Bearings." Thesis, 1996. http://ndltd.ncl.edu.tw/handle/16763475358699444462.
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Jian, Ming-Hung, and 簡銘宏. "Design Optimization and Analysis of PM Spindle Motor for Machine Tool." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/94092478822416088690.
Full textAbstract:
碩士逢甲大學
電機工程所
98
The purpose of this thesis is to design a permanent magnet brushless motor for machine tool applications. The structure of this motor is interior-rotor and the magnets are buried inside the rotor. The rated speed and maximum speed are 3900 rpm and 12000 rpm respectively. Under constant power control, the output power can achieve 6.9 kW. In order to increase the motor performances and reduce the manufacturing cost. The Taguchi method is applied to optimize cogging torque, torque ripple and minimize magnet volume. Finally, the demagnetization effect of magnets under the fault current is investigated.
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Zhang, Zhe-Wei, and 張哲瑋. "Design and Analyze of Spindle Motor for Five-Axis CNC Machine." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/81681993163570459846.
Full textAbstract:
碩士國立聯合大學
機械工程學系碩士班
103
The aim of this research is to design and analyze an interior permanent magnet synchronous motor for five-axis CNC Machine. The operation rated speed, rated power, and maximum rated speed are 3300 rpm, 35 kW, and 15000 rpm, respectively. First, a design scheme of the interior permanent magnet synchronous motor will be established through understanding the theory of synchronized motor and structure of interior permanent magnet. Following, electromagnetic field simulation software such as Ansys Maxwell is performed to verify the design results and analyze on the characteristics such as magnetic field distribution, electromotive force, cogging torque, output torque, and saliency ratio of the motor. Next, electronic circuit simulation software Ansys Simplorer is utilized to analyze the driver, control, and transient behavior of the motor when placed on the electronic circuitry. Finally, the research utilized differential evolution to optimize the design of the motor in order to minimize torque ripple and increase motor efficiency. Optimization software Noesis Optimus is used to design a low torque ripple and high efficient interior permanent magnet synchronous motor.
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李明中. "Design of Spindle Motor Speed Controller for CD-ROM Using Fuzzy Theory." Thesis, 2000. http://ndltd.ncl.edu.tw/handle/18269020290621231194.
Full textAbstract:
碩士逢甲大學
電機工程學系
88
This thesis presents the design of spindle motor speed controller using fuzzy theorem and provides a method for convergency of stability more rapidly. We established the knowledge base of control rules from the speed error and the change in speed error, and the proposed inference engine used the knowledge base to calculate the control signal according to the actual speed error and the actual change in speed error. The purpose of control is the setting of motor’s speed. We transform the speed error and the change in speed error into membership function and get the membership function of output signal from the operation with fuzzy logic relation matrix, and get the numerical value of output signal from the process of defuzzyfication. A fuzzy controller of a three-phase, nine-slot and 12-pole spindle motor for CD-ROM drive has been designed. The experimental results are verified with the computer simulation results using the matlab simulink. The experimental results show that the speed controller using fuzzy controller has good performances and is more robust. From the results of this thesis, we can investigate the stability analysis for the spindle motor. The design of fuzzy controller does not require accurate mathematical model of the system and is easy to implement.
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Chen, Yu-Chun, and 陳育俊. "Design and Analysis of a High Speed Permanent Magnet Brushless Spindle Motor." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/7k554w.
Full textAbstract:
碩士逢甲大學
電機工程所
100
A permanent magnet brushless motor is designed for use in a high speed spindle machine tool for glass grinding. The output power is 1.5 kW at rated speed of 60,000 rpm. First, the performance characteristics of four pole/slot combinations are analyzed using the magnetic circuit design software. Then, the finite element method is conducted to obtain the results. Based on the results, two pole/slot combinations, 2/3 and 2/18 are selected for the study. In order to reduce the torque ripple and loss, and increase the motor efficiency, a sensitivity analysis for back iron width and teeth width is investigated. Results show that the better performance can be obtained when the stator back iron thickness and the teeth width are 5.5 mm and 7 mm for 2/3 combination, and 6 mm and 1.4 mm for 2/18 combination, respectively. In addition, the effect of the rotor pole span and the magnetization on the performance is discussed. Results show that the performance is not improved as the rotor pole span decreased in the 2/3 combination, and the performance of 2/18 combination does not reduce obviously for parallel magnetization and rotor pole span of 140 electrical degree. It suggests that magnet usage can be obtained using fractional pole pitch. In order to reduce the eddy current loss in the rotor of 2/3 combination, a magnet-segment scheme is proposed in this thesis. Finally, the temperature distribution for both 2/3 and 2/18 combinations are simulated with different flow of cool liquid using the MotorCAD thermal analysis software.
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Miu, Wu-Laing, and 繆武良. "The Effect of Spring Preloaded Bearings on the Machine Tool Spindle Design." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/00307032960319162762.
Full textAbstract:
碩士逢甲大學
材料與製造工程所
94
In the field of HSM, high-speed spindle plays an important role. The amount of bearing preload has a direct effect on spindle rigidity and its maximum rpm. Therefore in the design of spindle, bearing preload must be carefully considered based on rigidity and maximum rpm. In terms of high-speed spindle, since temperature rise will cause the preload amount to increase, the Large O type bearing arrangement is used together with springs in order to maintain the preload amount. The Large O type bearing arrangement has a better load capacity in the axial direction. This research describes a mechanism of springs that can be adjusted and replaced externally. Based on the external spring adjustment (K, F), the spring size required to generate preload is theoretically selected. The required spring load to contribute to 12~15o temperature rise is then determined through experiment. Subsequently, using the various K values of spring under the same bearing preload, the effect of spindle temperature rise, elongation, static rigidity, and resonance frequency are experimented and observed. Meanwhile, the displacement distance of rear bearing housing due to temperature rise is measured, and the variation of bearing preload is analyzed.
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Non, Lin Hshin, and 林信男. "Optimization for the salient poles of a slight type spindle motor design." Thesis, 1999. http://ndltd.ncl.edu.tw/handle/03226101476068692220.
Full textAbstract:
碩士大葉大學
電機工程研究所
87
ABSTRACT The purpose of this thesis is to propose an optima formula design and simulation to thin-type CD-ROM motor slot''s configurations. The torque between spindle motor rotor and stator is influenced not only by the number of the rotor''s magnetic ploes but also by the stator''s curve shap configurations;cogging torquecomes from the rotor and the stator,s magnetic interference,higher cogging torque will cause vibration,noise and bad motor controllability. In order to reduce the influence of cogging torque and increase the spindle motor efficiency,we propose an idea to modify the motor stator curve shap configurations. The simulation results will show that after this modification design,we can not only to reduce the thin-type CD-ROM spindle motor cogging torque but not change the torque constant(ie. Torque constant is still remain the same).
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LIN, SHI-BIN, and 林世彬. "The study of spindle bearings basic layout design and optimum support locations." Thesis, 1992. http://ndltd.ncl.edu.tw/handle/05519704052090768063.
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Chu, Peng-Yuan, and 朱鵬元. "Design of Spindle Motor Speed Controller for CD-ROM Using Neural Network." Thesis, 2001. http://ndltd.ncl.edu.tw/handle/15120516307200002314.
Full textAbstract:
碩士逢甲大學
電機工程學系
89
Spindle motor is used to drive a disk in the CD-ROM so that the data stored in the disk can be accessed from the optics read head. Therefore, the motor must revolve rapidly and stably. This thesis presents the design of spindle motor speed controller using neural network and proposes a method to have the motor achieve its stable revolution speed more rapidly. We trained a back propagation neural network by utilizing the better sampling data from the experimental results of fuzzy speed controller to obtain the optimal weights in the network that describe the input-output parameters relations. Thereafter, we can use the neural network to control the speed of the motor. To conduct the optimization problem for the neural network, there are three ordered phases of programming: training program, testing program and system program. Firstly, training program, we trained a back propagation neural network by utilizing the better sampling data from the experimental results of fuzzy speed controller to obtain the optimal weights within the neural network. Secondly, we take the optimum weight values into the testing program again and compared errors between sampling values and output values. Finally, we apply the neural network to the system program and get the real output speed control signal by hardware experiments. The hardware experiments of this thesis utilized a three-phase, nine-slot and 12-pole spindle motor for CD-ROM driver. The experimental results are compared with open-loop and close-loop fuzzy speed controller to show the learning characteristic of neural network speed controller.