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为了解决爪极预锻上模模芯易在凸台圆角和爪齿型腔外侧圆角处开裂的问题,设计了爪极预锻上模组合模芯。采用Deform-3D数值模拟软件对爪极预锻上模整体模芯和组合模芯进行了模拟分析,并通过正交试验对组合模芯的结构参数进行了优化。分析结果表明:爪极预锻上模组合模芯具有更好的成形性能和较低的模具应力,组合模芯优化后的结构参数为:凸台模芯直径Ф43 mm、凸台模芯斜度0°、凸台模芯过盈量0.3 mm、模套过盈量0.6 mm、凸台模芯高度47 mm。预锻成形试验表明,3层组合模具可以有效避免预锻上模的开裂缺陷。
In order to solve the problem that the claw pole pre-forging core is easy to crack in the convex fillet and the outside corner of the claw tooth cavity, a claw pole pre-forging combined core is designed. The Deform-3D numerical simulation software was used to simulate and analyze the integral mandrel and the combined mandrel of the claw-pole preforming. The structural parameters of the composite mandrel were optimized by orthogonal experiments. The analysis results show that the claw pole preforming mold core has better formability and lower mold stress. The structural parameters optimized by the combined mold core are as follows: the diameter of the boss core is Ф43 mm, the slope of the boss core 0 °, boss die interference 0.3 mm, die interference 0.6 mm, boss die height 47 mm. The preforming test shows that the 3-layer combination mold can effectively prevent the cracking of the preform die.