The Development Of The CNC Manufacture System For Spiral Bevel And Hypoid Gears Based On The General 5-Axises Machining Center

The spiral bevel and hypoid gear is a efficient, stable and heavy loaded transmission part. So it is widely used in the equipments of ship, plane, helicopter, car and the other power machines. The demand of it is being more and more great. The tradition mechanical machine is being eliminated because of the specificity and the limitations of it. While the digital machining with completely CNC theory and technology is the current trend of manufacture. Based on the independent open CNC system TDNC-H8, a spiral bevel and hypoid gears CNC manufacturing system used for the manufacture of the spiral bevel and hypoid gears on general CNC machine is carried out in this thesis. This can highly reduce processing costs and improve machine utilization.This thesis does some research on the processing theories and technologies of Gleason gears. After analyzing the essence of forming mechanism of Gleason gears, the various processing methods are integrated. Meanwhile, the differences and processing technology among the methods is described in details.Using the differential geometry and the coordinate transformation of space vector, the spatial kinematics of spiral bevel and hypoid gears is researched based on the forming mechanism of spiral bevel and hypoid gears. Based on the established mathematical model, deduces out post processing formulas of CNC machine tools for spiral bevel and hypoid gears. According to above researches, a NC programming system was developed especially for spiral bevel and hypoid gears on the open CNC machine.At the last part, the special tool holder and fixture are designed for the open CNC machine. Through out the simulation and actual cutting, the feasibility of the theory and correctness of NC code are tested. In the end, the thesis analyzes the gear precision and discusses the reason for the error.To sum up, the researches of processing theory and the establishment of the CNC system for spiral bevel and hypoid gears are a explorative research for the following studies on the multi-gears machining, on machine gear verification, machining simulation and tooth contact analysis (TCA), and so on.