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摘要：
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基于弹塑性有限元数值模拟技术,使用MSC/SuperForm软件对传动轴渐开线花键冷挤压成形过程进行了数值模拟,在坯料直径、凹模入口半角和定径带宽度等参数已优化的前提下,选择了GTi50作为模具材料,比较了不同模具结构对挤压工艺的影响,结合传统的组合凹模计算方法,实现了模具结构的优化。工艺试验表明,模具结构优化合理,数值分析及计算准确。
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Based on elastic-plastic FEM simulation technology,the simulation of cold extrusion process for involute spline of transmission by MSC/Superform was introduced.Provided that the parameters of billet diameter,die entrance half angle and working load of die were optimized,GTi50 was selected as die material,and the influence on extrusion process with different die structures was compared.Furthermore,integrating the calculation method of traditional combined die,the optimal parameters of die structure were obtained.It is shown by process tests that the cold extrusion process and die design are reasonable and the results of numerical simulation and analysis are correct.
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基金项目：
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安徽省青年教师资助项目(2008jq1027)
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作者简介：
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参考文献：
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[1]Karl Kuzman.Problems of accuracy control in cold forming[J].Journal of Materials Processing Technology,2001,113:10-15.
[2]方泉水,辛选荣,刘汀,等.6061铝合金花键壳体冷挤压工艺研究[J].锻压技术,2007,32(1):24-27.
[3]郑晖,于江,廖立平.冷挤压模具结构的改进[J].锻压技术,2007,32(5):92-93.
[4]周琨,陈国学.伞齿轮精密成形模具变形的数值模拟分析[J].塑性工程学报,2002,9(1):74-77.
[5]徐虹,贾树盛,白凤梅,等.基于数值模拟的渐开线花键件冷挤压工艺参数优化[J].塑性工程学报,2005,12(6):7-10.
[6]MSC.Marc接触分析培训教程[M].北京:MSC.Soft-ware,2001.
[7]徐虹,贾树盛,滕宏春,等.冷挤压预应力组合凹模刚度的优化设计[J].机械强度,2004,26(5):583-586.
[8]解文辉,陈学文,张彦敏,等.冷挤压双层组合凹模的设计[J].锻压技术,2002,27(4):51-53.
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