Research On The Principle Of Internal Gear Skiving And Virtual Simulation Machining

As an advanced internal gear processing method,power skiving has higher processing efficiency and processing accuracy compared to the traditional gear shaping and gear pulling.This method has received extensive attention from the industry.The design of skiving cutter is the core technology of power skiving.It plays a significant role in the application and promotion of skiving and directly related to the quality of gear processing.In case of the complex design process of skiving cutter and existing theoretical error,this paper proposes two design methods and a modification scheme for the skiving cutter to achieve the optimal design of the skiving cutter.Through the analysis of the tooth surface deviation and the TCA analysis,the modification scheme was analyzed and verified.Finally,the simulated machining of power skiving was implemented in VERICUT.Initially,the principle of skiving was analyzed in depth followed by the structure design of the skiving cutter.Then,according to the double-degree-of-freedom envelope principle of the space curve,the meshing equation of the skiving was deduced,where the structure of the machine tool was also analyzed.Secondly,based on the principle of involute generation and the rack cutter,the tooth surface design of the cutter was realized.Then,the tooth profile modification was realized on the basis of the rack cutter.Moreover,an example was given to verify the deviation of the inner gear tooth surface,and the optimal design of the skiving cutter was realized by using genetic algorithm.Thirdly,the digital tooth surface models of big and small gear were established.Then,the TCA model of internal gear pair was established by B-spline surface fitting.In addition,the size and direction of the long axis of the contact ellipse were determined according to the main curvature and main direction of the surface.Eventually,the feasibility of the modification scheme was verified.At last,the special machine tool and skiving cutter was constructed in CATIA.In the same time,the virtual simulation of tooth scraping was realized in the VERICUT platform.Furthermore,the correctness of the principle of tooth scraping was verified,which has done the technological preparation for the internal gear trial cutting.