Optimization analysis for key component of a precision optical aspheric grinding machine

Manufacture of ultra-precision micro-structured freeform surface relies on the high precision of machine tools. Precision, stability and repeatability of the Z-axis are the key factors of the high precision machine tools. The key component of the Z-axis is the ram, and its stiffness and stability have a crucial influence on the final precision. This paper demonstrated the structure optimization of the ram using finite element method based on ANSYS and the results were achieved to illustrate how the optimization variables affect the stiffness and deformation of the ram. Finally, the local three optimal design points were displayed and one of the Most appropriate candidate points was chosen as the new design.