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CA6140 is the most widely used kind of ordinary horizontal lathes in a factory workshop. This paper, with the aid of Pro / E software and its related functions, visually displays the structure of Lathe CA6140’s main components, dynamically simulates assembly and disassembly processes of its typical mechanism, and thereby realizes its non-damage dynamic simulation assembly and disassembly, creates the mode of combining actual and virtual dynamic assembly and disassembly and realizes the optimization of its assembly and disassembling actions.

The evaluation of material cutting performance is a complicated and comprehensive process. Only by using the fuzzy comprehensive evaluation way can we get a satisfactory result. This essay, on the basis of fuzzy theory, illustrates the steps of fuzzy comprehensive evaluation, introduces the factors influencing 18Cr2NiWA's cutting processing performance, gives a fuzzy evaluation of the factors, and thereby successfully solves the problems regarding these multi-factors' decision and evaluation.