Abstract:In the lampcover production industry, there has been no spinning machine consisted of special CNC system by now, and most of which were reformed from general NC machine tools, so the function of numerical control system was wasted and the cost of CNC spinning machine is really high. The authors,by using the hardware devices such as industrial control computer, servo drive and frequency converter, designed the electric control system of lampcover CNC spinning machine, the geometry shape of the lampcover and spinning processing technology, also developed a lampcover spinning path control model, and upon which the special numerical control system of lampcover CNC spinning machine is worked out. As long as the model parameters, the outer contour parameters of processing track and the lamp processing parameter are input to special CNC system, the processing track diagram will automatically be figured out according to the set algorithm and hob shall carry out the automatic spinning processing in accordance with the track diagram, therefore, the automatic control of machining process is realized.