Design And Control Research For The Main Drive System Of The CNC Gear Shaping Machine With Quick Return Characteristics

The mainstream development of the CNC gear shaping machine is becoming high-speed, high-precision, high-efficiency and flexible. But the slider crank mechanism is usually used as main drive mechanism in the general gear shaping machine. Without quick-return characteristics in normal processing, the cutting process time and the return process contrast, the processing efficiency is low. In addition, the speed fluctuation is obvious in the process of high speed movement. Which leads the machining accuracy is low. According to the limitations of helical guides are expensive and replacement requires a fair amount of time and a lot of skills, which leads the processing efficiency and precision can’t meet requirement. Therefore, the optimization design on the main drive mechanism has been done, and proposing a kind of electronic helical guides to substitute for the mechanical helical guides.Utilizing the double crank-slider crank mechanism as main drive mechanism of gear shaping machine. Choosing the length and installation angle as the design variables, and the object function and restrain conditions are determined, the optimization has been done by the complex method. Follow the optimize results, by using the Solid Works software, the solid model of double crank-slider crank mechanism was established and imported into ADAMS, kinematics simulation was carried out. Through comparing the pre and post results show that the stable velocity in working stroke was obtained by the main drive mechanism, the variable quick-return characteristics can remarkably improving the processing efficiency and accuracy, and meet processing requirements of different tooth width.This paper expounds the principles and characteristics of electronic gearbox in detail. Then, the mathematical model of helical gear shaping process was deduced. Based on electronic gearbox, the electronic helical guides was established, which can meet the production of workpieces with various torsion angles by numerically control. All of those,contributes to the reduction of processing time, and remarkablyimproving flexible performance of the CNC gear shaping machine.In this paper, Utilizing the optimal design method and virtual prototyping technology, the optimize design and kinematics simulation of the main drive mechanism has been done before physical prototype created, Which provide important references and significance on the development of high-performance CNC gear shaping machine.