Abstract
The design analysis of vertical lathe auxiliary equipment for large pressure vessel processing has been done in this paper. The finite element method has been used to find the main factors which influence the processing precision. The results show that the main factor influencing maximum displacement of overall structure is not the vertical lathe cutting force but the weight of the large pressure vessel. So it is unreasonable to control the processing precision by the whole structure maximum displacement. The horizontal displacement is the main factor in controlling processing precision. The pressure vessel work piece sits on the top plate of the vertical lathe auxiliary equipment. So the displacement of the top plate of the vertical lathe auxiliary equipment is the main factor influencing processing precision. This kind of design thinking has been successfully applied in three type large pressure vessels. It has certain reference value in similar design.
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