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《Engineering Mechanics》 2006-S1
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ANALYSIS AND OPTIMIZATION OF WORKPIECE DEFORMATIONS BY MULTIPLE CLAMPING FORCES AND THE APPLICATION SEQUENCES

QIN Guo-hua1,2 , ZHANG Wei-hong1 , WU Zhu-xi2 , LI Yang3 (1. Sino-French Laboratory of Concurrent Engineering, Northwestern Polytechnical University, Xi’an, Shaanxi 710072, China; 2. Department of Mechanical Engineering, Nanchang Institute of Aeronautical Technology, Nanchang, Jiangxi 330034, China; 3. Shaanxi Aeronautic Carbide Tool Company, Mianxian, Shaanxi 724200, China)  
Considering frictions between a workpiece and the fixture elements, a mechanical model is formulated aiming at analyzing the effect of multiple clamping forces and their application sequences on contact forces. According to the principle of the minimum complementary energy, a finite element method is presented to reveal the influence of multiple clamping forces and contact forces on workpiece deformations. Furthermore, a mathematical model is proposed to optimally select the magnitude, action point and applying sequence of multiple clamping forces. Finally, a representative example is illustrated. A detailed discussion is made about how the analysis and optimal design of clamping sequences are carried out. Numerical simulation results show that the proposed method, in addition to the verification of the magnitude and action point of multiple clamping forces, can be used to study the feasibility of clamping sequences.
【Fund】: 国家自然科学基金资助项目(50435020);; 陕西省自然科学基金资助项目(2004E217);; 南昌航空工业学院科研基金(EA200503139)
【CateGory Index】: TG75
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