Research On Parameters Optimization Of High-speed Dry Gear Hobbing Process

High-speed dry gear hobbing technology promotes the gear manufacturing industry to numerical control, high-speed and efficient, functional complex, green environment protection, intelligent, it’s the development trend of the future hobbing. However, the application in gear manufacturing industry is not satisfactory so far, not only the low proportion of machine tools, but also the poor efficiency. As a result, its excellent performance has not been effectively exerted. High-speed dry hobbing technology bases on the absence of coolant or little coolant condition.The technologies, such as the machine tool technology, the cutter technology, the process technology, have a huge difference to traditional wet hobbing. Those reasons affect the promotion and application of high-speed dry gear hobbing.With the development of machine beds technology, tool technology, how reasonable selecting of process parameters is increasingly becoming a key factor that restricting high-speed dry hobbing technology applications. At present, gear manufacturing industry when used high-speed dry gear hobbing machine, commonly used empirical method or test method to develop process parameters. Process staffs obtained the process parameters through consulted a variety of processes manual or referenced to the parameters of traditional wet gear hobbing, and combined with their own experience. Since the huge difference between the high-speed dry gear hobbing and the traditional wet gear hobbing, this method to select the parameters was easily effected by the experience and technical level of personal technologist, and can not effectively exert the function of the high-speed dry gear hobbing machine tools, and resulting in waste of equipment.Process parameters optimization of high-speed dry gear hobbing is mainly about the selection of optimal cutting parameters. At present, there existed a lot of process parameter optimization studies for turning, drilling, milling and conventional wet gear hobbing. But the studies of process parameter optimization as an optimal solution of the optimization model under high-speed dry cutting process parameters were not many. Therefore, this paper took cutting parameters of high-speed dry gear hobbing as the optimization goal, built the optimization function model of the comprehensive target integrated processing costs and processing time, which is to get the best optimum cutting parameters for the high-speed dry gear hobbing processing. Then through the way that combines the algorithms and experimental, took the obtained optimizational cutting parameters as a test group, the cutting parameters originally used as a referenced group, experiment the real machining tests with the conditions under the same machine tools, processing environment, the work-piece and other conditions. In order to judge the reliability of the integrated objective optimization function, the quality of the work-piece, tool life, machining costs, cutting the processing time on the two parameters were analyzed. At the same time, the result provided some support for the establishment of the future high-speed dry hobbing process parameters data base.