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摘要：
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管件内高压成形工艺是近几年发展起来的一种新的塑性成形技术。本文分析了三通管内高压成形时的主要变形特点和技术关键,采用数值模拟方法给出了不同轴向进给速度下零件的壁厚及等效应变分布,并分析了轴向进给速度对成形性能的影响。分析结果表明,当轴向进给速度过快时,主管中部壁厚增厚严重,形成死皱。当轴向进给速度过慢时,主管中部容易导致变形区补料不足而破裂。因此轴向进给速度的选取对内高压成形三通管具有重要影响,对于成形TP2紫铜三通管,合理的轴向进给速度是0.5 mm.s-1。
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High inner-pressure hydro-forming is a new forming technology being developed in recent years.The characteristics and key technologies of high inner-pressure hydro-forming for T-branch tube were analysed.The corresponding thickness distribution and strain distribution at the different axial feeding speeds were studied by numerical simulation,and the forming capability influenced by axial feeding speed was also investigated.The calculated results show that when axial feeding speed is too large,the middle part of the main tube will be thickened and the crinkle is occurred,and when axial feeding speed is too small,it will be thinned and the crack is occurred.The selection of axial feeding speed has a strong influence on hydro-forming T-branch tube,and for the T-branch tube of TP2,0.5 mm·s-1 is regarded as the best parameter.
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基金项目：
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河南省杰出人才创新基金项目(0421000700)
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作者简介：
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参考文献：
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