Ordinary vertical lathes can meet the cutting of ordinary end faces and outer circles, but they are not suitable for the processing of curved parts. Machining curved parts requires first designing and manufacturing tooling according to the requirements of the parts, and then using the tooling for processing, so there are high production costs, poor product adaptability, and long processing cycles. According to the structural characteristics of vertical lathes, through technical and economic feasibility analysis, the all-digital DC speed regulation transformation of the main drive system of the machine tool, the numerical control transformation of the left tool holder feed system, and the design and debugging of the numerical control electrical control system are specifically realized.

1. The all-digital DC speed control transformation of the main transmission system adopts the British Continental 590~ + all-digital DC governor, and on the basis of retaining the original transmission mechanism, the original hydraulic 16-level manual transmission of the machine tool is transformed into a hydraulic 4-level stepless speed control. The transformation content includes the choice of speed control scheme and motor, the adjustment of the main transmission transmission route, and the design of the DC governor control circuit and PLC control program.

2. The numerical control transformation of the left tool holder feed system uses the ball screw to replace the original sliding screw and semi-closed-loop control. The transformation content includes the selection of the control mode of the servo feed system, the determination of the transformation plan of the mechanical part of the feed system; the parameter calculation and selection of the ball screw pair and servo motor;

3, SINUMERIK 802D numerical control system effectively realizes the X-axis and Z-axis linkage control of the left tool holder, the design content of the numerical control electrical control system mainly includes the composition and connection of the numerical control electrical control system, and the design and debugging of the PLC program in the numerical control system