Minimum Normal Force Principle Based Quantitive Optimizationof Clamping Forces for Thin Walled Part |
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Authors: | ZHANG Fa-ping SUN Hou-fang and SHAHID IButt |
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Affiliation: | 1. School of Mechanical and Vehicular Engineering, Beijing Institute of Technology, Beijing 100081, China 2. National University of Sciences and Technology, Lahore 54500,Pakistan |
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Abstract: | Based on the stability criteria of workpiece-fixture system, quantitative optimization of clamping forces during precise machining process for thin walled part is studied considering the contact condition between wokpiece and locator, the contact mechanical model is achieved ,which is further been used to calculate the entire passive forces acting on the statically undetermined workpiece by means of the force screw theory as well as minimum norm force principle. Furthermore, a new methodology to optimize clamping forces is put forward, on the criteria of keeping the stability of workpiece during cutting process. By this way, the intensity of clamping forces is decreased dramatically, which will be most beneficial for improving the machining quality of thin-walled parts. Finally, a case study is used to support and validate the proposed model. |
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Keywords: | workpiece-fixture system stability minimum norm force principle clamping forces optimization |
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