直齿圆柱齿轮冷挤压成形腔参数优化

Parameter Optimization of Female Die Molding in Cold Extrusion of Spur Gear

针对齿轮冷挤压技术存在的成形压力大和坯料填充困难问题,建立了流线型的直齿圆柱齿轮冷挤压成型腔几何模型,并对挤压过程进行了数值模拟。结果表明,流线型挤压腔能够在较小的成型力下保证挤压齿轮齿形填充饱满。通过对模拟过程的分析,研究了不同坯料放大半径λ值对成型腔形状和挤压方式的影响,并通过对不同成型腔的数值模拟,得到最优的参数模型。

Aimed at the problems of great deformation force and hard corner filling in cold extrusion of spur gear,a geometry model of the streamline female die of spur gear is constructed,based on which numerical simulation of cold extrusion of spur gear is conducted.The results indicate that the streamline female die is effective in improving metal filling in parameter value of λ for a most optimized model is found through numerical simulation of corner under small deformation force.By analyzing the influence of different blank magnifying radius（namely λ） on female die shape and deformation mode in the simulation process,the different female dies.