Compared with traditional cutting process, the hot precision forging cold extrusion compound forming process has the advantages of high efficiency, good product performance, high material utilization and low production cost. Compared with traditional single plastic forming process, it has the advantages of small forming load, high die life, high product precision and good product surface quality, and can form cylindrical gears with large module and diameter.Therefore, the research on the composite precision forming process of hot precision forging and cold extrusion has important engineering practical significance.
The research significance of cold extrusion finishing of cylindrical gear by hot precision forging is mainly reflected in the following aspects:
1) Put forward the load forecasting model of gear hot precision forging, analyze the influence of gear shape, geometric size and other factors on forming load, and provide guidance for selection of gear precision forging press;
2) Research on precision control methods of hot precision forging and cold extrusion of gears, put forward mathematical models of tooth profile and tooth deformation of workpiece and die, and provide theoretical guidance for improving product accuracy and toothed design of dies;
3) Study the hot precision forging cold extrusion compound forming process of cylindrical gear, analyze the influence of die structure and main process parameters on the compound forming process, and provide theoretical basis for process design;
4) Study the hot precision forging cold extrusion compound forming process of cylindrical gear, analyze the influence of die structure and main process parameters on the compound forming process, and provide theoretical basis for process design.