Research on Hybrid Input Mechanical Press Driven by Two Motors

1 Introduction The mechanical press is very important for plastic forming, whose service performance has a direct effect on the quality of workpieces and the working life of dies. The transmission system of a general mechanical press consists of a belt drive, gear reducer and crank-slider mechanism. This transmis- sion system gives the slider a higher speed at the de- formation stage of the plastic workpiece and clearly has some heavy disadvantages. Cracks easily initiate on the bottom of a cy…

Research on Hybrid Input Mechanical Press Driven by Two Motors

Given the speed requirements of a mechanical press slider, a differential gear train is adopted instead of the belt and gear drive of a general mechanical press. Two electric motors are used to drive the differential gear train with hybrid input. Based on the working principle of a differential gear train, the angular speed equations and the power distribution equations of the input-output system are established. By controlling the angular speeds of the two motors, the slider can move at different speeds. Taken a JH23-100 type mechanical press as example, the driving system is designed and the power of two motors determined. The simulated results show that the highest slider speed in the mechanical press approaches 39 mm/s only at the forging-punching stage, far less than the 232 mm/s of a general JH23-100 type mechanical press. This provides a new scheme to realize low-speed forging-punching technology from a mechanical press.