Abstract: In order to minimize the clamping deformation and improve the machining accuracy
of thin-walled parts, a synchronous optimization method of clamping sequences, fixture layout and
clamping forces was presented with the objective function of minimizing the deformation and through
the combination of genetic algorithm and finite element method. An aviation thin-walled work piece
was optimized by this method, and compared the optimization results with the experience empirical design
and the traditional analysis results. This method can effectively reduce the work piece deformation due to
improper clamping and improve the machining accuracy. The result proved the veracity of the
synchronous optimization method of clamping sequences, fixture layout and clamping forces.

Key words: clamping deformationl, genetic algorithm, finite element, synchronous optimization