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摘要：
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对铜母线连续挤压过程的几何模型进行简化,基于MSC.Superforge软件平台,对铜母线连续扩展成形过程进行了数值模拟,确定了压下量为铜杆料直径的25%时为压实轮对铜杆压下量的最佳值,分析了铜连续挤压成形过程中坯料在挤压轮沟槽内的温度分布,指出在铜的连续挤压过程中,坯料的温度上升主要源于坯料的塑性变形。结果显示,铜坯料作用在腔体挡料块上的压力高达528～600 MPa,在坯料镦粗段前偶尔会发生折叠回流,这是造成连续挤压产品表面产生较大气泡和冷拔时断线质量缺陷的重要原因之一。为了避免金属流动造成的产品质量缺陷并提高腔体的使用寿命,应对腔体、挤压轮进行优化设计。
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By simplifying the geometry model of the copper bus bar continuous extrusion process,based on a new metal forming simulation package,MSC.Superforge,the copper bus bar continuous extending forming process was simula- ted,the optimum deforming quantity of copper rod pressed by coin wheel was 25% of copper rod diameter,the tem- perature distribution of billet in the extrusion wheel groove in the copper continuous extrusion process was analyzed, and temperature rising mainly rooted in metal plastic deformation.The results indicate that the pressure on the abut- ment of chamber comes to 528～600 MPa,sometimes,there is puckering circumfluence in the front of the upsetting zone of billet,which is one of the most important reasons leading to product surface quality defects,bigger air bubbles and broken thread when being hard drawn.In order to avoid quality defects caused by metal flowing and improve the useful life of the chamber,the designs of chamber and wheel should be optimized.
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基金项目：
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国家自然科学基金重点资助项目(50635020)
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作者简介：
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参考文献：
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