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Abstract: Deformations of aerospace structure parts during NC
machining decrease accuracy. Thin-walled arc workpieces suffer more
seriously as there are more uncertainty and complexity in their
machining and alignment. Fixture layout can influence the workpiece
machining deformation by changing the rigidity of fixture-workpiece
system. A model for reducing elastic deformation in machining through
optimal placement of fixture clamps around the workpiece, is presented.
The layout optimization model which is developed and carried out by FEM
is shown to improve the overall workpiece deformation and distribution
condition.
Key words: Fixture Machining deformation Finite element
Optimization
CLC No: TP391
国防科工委“十五”预研基金资助项目(418010601-6). Received 20040608, received in revised
form 20041230
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