Research On The Manufacturing Technology Of Large Spiral Bevel Gears

The overlapping coefficient,transmission performance,and bearing capacity of the spiral bevel gear are better than those of other general gears on equal conditions.Therefore,spiral bevel gears are increasingly used in various high-speed and heavy-duty intersecting shaft drives.Large-scale,high-precision spiral bevel gears are mainly used in large ships,energy exploration and defense and military equipment,and are the guarantee for the transmission capabilities of these advanced equipment.With the needs of modern engineering,the performance requirements for large-size high-precision spiral bevel gears are also increasing.In order to improve the processing accuracy and performance of large spiral bevel gears,in this article,do research on composite manufacturing technology for large spiral bevel gears relying on the research and development projects of large-scale curved bevel gears and complex precision manufacturing technology and equipment.According to the principle of gear meshing and the processing principle of gear cutting,this paper established the mathematical model of the HBM hypoid gear surface,and obtained the coordinate values of the discrete points of the tooth surface through the numerical iterative method of MATLAB programming.Based on the SolidWorks software platform,the solid model of the hypoid gear pair wheel was completed.Introduced the types of composite manufacturing machine tools.The necessity of gear composite manufacturing and the current status of the existing composite manufacturing technology are analyzed.The large-scale curved bevel gear composite manufacturing machine tool studied in this topic is introduced in detail.Comparing with the traditional spiral bevel gear processing machine,it could fully reflect the superiority of the spiral bevel gear processing machine researched by this research group.Designed how to realize a large-scale spiral bevel gear milling,tooth surface laser quenching,grinding and on-machine inspection composite manufacturing method through one clamping.By introducing the scanning method of gear laser quenching,the best scanning method for laser quenching of large helical bevel gears was obtained.Three kinds oflaser quenching trajectory paths were proposed.After comparing the advantages and disadvantages between them,the optimal laser quenching trajectory planning method was selected and the trajectory points were solved.The process parameters affecting the laser quenching effect of gears(including the distance between adjacent quenching belts,axial offset and incident angle of tooth surface,etc.)were discussed,and the method for determining the value of each process parameter was given.Two kinds of schemes for laser quenching tooth surfaces of large spiral bevel gears were designed and detailed descriptions of these two schemes were given.The laser quenching simulation of large spiral bevel gear tooth surface by Robot Art off-line programming software verified the feasibility of the designed scheme.