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单拐曲轴多向挤压成形较传统生产方式大大缩短了工艺流程,实现了单拐曲轴的全流线成形,且批量生产对其模具设计也提出了更高的要求,针对单拐曲轴多向挤压工艺模具的特点,从模具的服役环境出发,对多向模具结构中镶块部分进行分析和优化。根据镶块分模面的位置不同,设计了“窄镶块”和“宽镶块”两种类型,通过数值模拟和实验验证的方法,进行了较深入的分析和对比。研究结果表明:采用镶块方式设计模具具有可行性,“宽镶块”模具结构具有较高强度和刚度;实验中窄镶块易出现“折痕”缺陷,而采用宽镶块结构有效避免了该类缺陷。镶块结构有助于降低单拐曲轴模具制造成本和提高产品质量。
Single-crank crankshaft multi-direction extrusion forming process greatly shortened the traditional production methods, to achieve a single-crank crankshaft full streamline molding, and mass production of its mold design also put forward higher requirements for single-crank crankshaft multi-directional The characteristics of the extrusion process mold, starting from the mold service environment, the mold part of the multi-directional analysis and optimization of the insert block. According to the different position of the parting surface of the insert, two kinds of “narrow insert” and “wide insert” are designed and analyzed and compared through numerical simulation and experimental verification. The results show that it is feasible to design the mold by insert method, the mold structure of “wide insert” has higher strength and rigidity. In the experiment, the narrow insert is prone to “crease ” defect, The structure effectively avoids such defects. Insert structure helps to reduce single-crank crankshaft mold manufacturing costs and improve product quality.