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摘要：
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本文以不同高径比的试样在仿真有限元软件DEFORM中进行三维动态模拟,分析不同的模具结构对圆柱体坯料局部镦粗成形过程的影响,研究冷锻过程中的局部镦粗规则,并以伞齿坯的成形为例证明此规则的合理性。
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In these experiments we will carry out some three-dimensional dynamic simulations by using cylinder blanks of various ratio of height to diameter(L/D)with finite element software DEFORM, analyze the conclusion gained by using different dies during upsetting processes of cylinder blanks, so we will deduce some upsetting instructions which based on the quality improvement of workpiece. Then it is testified to be rationality through the umbrella gear's forming.
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基金项目：
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作者简介：
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参考文献：
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[1]杨雨春,胡国安·镦粗长轴类锻件避免失稳的研究[J]·锻压技术,1999,(2):78·
[2]高锦张,贾俐俐,陈文琳·塑性成形工艺与模具设计[M]·北京:机械工业出版社,2001·
[3]吴乐尧,张哲武,詹艳然·摩擦对高坯料压缩稳定性的影响[J]·金属成形工艺,2002,(6):2931·
[4]段新建,聂绍珉·圆柱体平板镦粗工艺参数的优化研究[J]·塑性工程学报,1998,(4):13·
[5]俞汉清,陈金德·金属塑性成形原理[M]·北京:机械工业出版社,1999·
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