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《Journal of Engineering Design》 2010-03
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The optimum design of high-precision flexible fixture based on finite element analysis

LIU Dong-hong1,ZHAO Jian-cai2,ZHANG Yi-xiang2(1.College of Engineering and Technology,Taizhou Radio and TV University,Taizhou 318000,China;2.School of Mechanical Engineering,Shanghai Jiaotong University,Shanghai 200240,China)  
The theoretical calculation and experimental analysis have been done to solve the deformation problem of flexible fixture in the process of high-precision machining.First of all,the deformation of the existing flexible fixture had been analyzed using the CAE software.And then,the structure of fixture had been optimized by changing the parameters of the structure and dimension of fixture using the CAD software to reduce the deformation of the fixture in the process of positioning.To verify the effect of optimization,the deformation of the optimized fixture had been analyzed using the CAE software once again.The calculation results showed that,in order to ensure the maximum deformation to satisfy the machining accuracy requirements,many measures could be taken,such as increasing the stiffness of the principal plane,increasing the stiffness of the ribbed slab and changing the locating points of the fixture,and so on.Finally,the deformations of the locating points of the fixture were analyzed by experiments.The deformation of four points in the clamping process are less than 0.01 mm,which meets the accuracy requirement in the high-precision machining.The experimental results are basically in line with theoretical results.The optimized scheme has a good effect in producing process.
【CateGory Index】: TG751
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