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基于对棘轮的工艺性分析,设计了它的冷挤压工序的中间件和相应的模具。采用数值模拟对棘轮冷挤压过程进行分析以获取金属流动规律和挤压力。模拟结果表明:在冷挤压过程中,三道工序依次完成了工件的头部扩口、底部减径和头部二次扩口,以及内外齿的精密成形;三道工序的最大成形载荷分别为2.8、2.7、3.8 MN。实际冷挤压棘轮的齿形饱满、表面质量良好且无折叠和开裂,这表明棘轮冷挤压工艺和模具设计是合理的。
Based on the craft analysis of the ratchet, the middleware of the cold extrusion process and the corresponding mold are designed. The numerical simulation was used to analyze the ratcheting cold extrusion process to obtain the metal flow law and extrusion pressure. The simulation results show that in the process of cold extrusion, the three processes sequentially complete the head flare, the bottom drop and the second flared head, and the precision forming of the internal and external teeth. The maximum forming load of the three processes 2.8, 2.7, 3.8 MN. The actual cold extrusion ratchet teeth full, good surface quality and no folding and cracking, indicating that the ratchet cold extrusion process and mold design is reasonable.