Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 90 for “"Machine tool"”.
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Hydrostatic machine tool spindles
… of the self-compensating type, to precision machine tool spindles. First, relations are developed that can be used to calculate the hydraulic resistances of various bearing land flows in tilted and untilted orientations. These relations are then applied to predicting the load carrying …
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Rapid machine tool design
Rapid Machine Tool Design encompasses new materials and manufacturing and design processes that increase the speed and flexibility of the machine tool development process. Rapid design implies increased concurrency and overlap of design process steps, and it allows a quick and efficient response to …
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Dynamic Reconfigurable Machine Tool Controller
… framework is proposed which will allow a machine tool to be controlled by a variety of applications and control laws. This Reconfigurable Mechanism for Application Control (RMAC) paradigm uses a hierarchical architecture to configure a mechanism into a device driver for direct control by …
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Digital Tracking Control for Machine Tool Feed Drives
The use of linear motor direct drives as feed drives enables higher feed rates and accelerations, eliminates problems with backlash, and reduces power waste due to friction. Servo controller design of those feed drives becomes more challenging due to dynamic interaction between the servo control …
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Machine tool chatter suppression using spindle speed variation
… of spindle speed is small and independent of the tool motion, by expanding the delay terms about a finite mean delay and augmenting the system, the time dependent delay system can be written as a state dependent delay system. The augmented system of equations is autonomous and has two pairs of …
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Manufacturing and testing of composite machine tool structures
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1985.
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Design of a kinematic coupling for machine tool fixturing
Thesis (B.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1997.
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The Relationship Between The Machine-Tool Structure and Its Cost
Made available in DSpace on 2014-12-09T17:13:43Z (GMT). No. of bitstreams: 1 6808173.pdf: 6602729 bytes, checksum: 6a4b735dac341243007b06fe103dc25a (MD5) Previous issue date: 1967
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Machining accuracy enhancement using machine tool error compensation and metrology
… aims to enhance machining accuracy by machine tool error reduction and workpiece metrology. The error characteristics are studied by building a quasi-static error model. Perturbed forward kinematic model is used for modeling a 5-axis Computer Numerical Control (CNC) machine with one …
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Hydrostatic radial bearings for high speed precision machine tool applications
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1994.
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Flexible machine tool control for direct, in-process dimensional part inspection
<p>For some time now coordinate measuring machines have been an integral part of the shop floor. The goal has been to make coordinate measuring machines (CMMs) into tools that can easily be used by machinists to improve their manufacturing capabilities. The value of a CMM as a quality control tool …
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Design and Development of a Distributed System for Monitoring of Machine Tool Behavior
… system for the monitoring of numerical control machine tools. This work discusses all the design steps from the conceptualization of the hardware architecture to the development and implementation of monitoring algorithms. In the first chapter the state of art in machining automation will be …
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Optimal choice of machine tool for a machining job in a CAE environment
Developments in cutting tools, coolants, drives, controls, tool changers, pallet changers and the philosophy of machine tool design have made ground breaking changes in machine tools and machining processes. Modern Machining Centres have been developed to perform several operations on several faces …
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Technology valuation within the context of transfer collaborations with Chinese machine tool companies
… investigations focused on the UK and China machine tool industries, where there are many technology transfer activities and the value issue has already been recognised in practice. Data were gathered from three groups: machine tool manufacturing technology suppliers in the UK and acquirers …
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Machine tool accuracy characterization, error modeling and compensation using telescopic ballbar and laser interferometer
… the results of the research investigation on the machine tool accuracy characterization, error modeling and error compensation using telescopic ballbar and laser interferometer. Increasing demand for both higher machine tool accuracy and machining tolerances has resulted in a great need to measure …
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Using machine tool feedback for predicting the performance of as-manufactured assemblies : a feasibility assessment
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2003.
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Comparative study of international marketing strategy of Japanese and Taiwanese CNC machine tool industry in the ASEAN region
… War II, the USA and Europe dominated the world's machine tool industry, exporting costly high-performance machine tools. Emerging from the ravages of war and a decimated manufacturing base, Japanese and Taiwanese machine tool manufacturers were committed to catching up with the leading edge …
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Accuracy and Calibration of Conventional and Parallel Link Machine Tools
… then implemented on a three-axis parallel link machine tool. The final results show that successful calibration of a parallel link machine tool is possible when the research presented in this thesis is implemented.
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Multi-variable optimal numerical control using adaptive model for identification of thermally induced deformation in high-speed machine tools
… equal place with other sources of error, namely tool wear and mechanical deflection. The demand of the manufacturing sector to control the residual thermal errors below ±10 om in the whole working range of the machine tool has not yet been achieved. Since it is impossible to design machine tools …
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Design and analysis of a small-scale cost-effective CNC milling machine
… a high precision cost-effective mini CNC milling machine. This newly designed machine tool can be widely used in electrical and medical industry for making small parts and engraving small features. Various structures were explored and compared during the design stage. Different commercial products …
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