tomated production demand. So the graduation design of nc machine tool market at present is widely applied. РThis graduation design is design C lathe main drive system. Numerical control lathe pact structure, high work efficiency, can realize automatic control, so and widely accepted. Its transmission system is posed of transverse feed system and vertical feed system. General nc machine tools are driven by stepping motor, through the transmission of ball screw feed. In this graduation design, through the analysis of the transmission scheme determined, the center axis of the drive system and key parts such as checking, etc. At last, through analysis, a close to the production, the economic and reasonable scheme of nc machine tools. РKey words: CNC lathe; Ball screw; Main transmission system
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