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摘要：
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冷镦圆头凹模是冷镦螺栓生产过程中的关键模具。试验发现,整体凹模在冷镦过程中受三向拉应力作用,极易发生开裂而造成早期失效。为消除应力集中,以3层套圈组合结构代替整体凹模,在结构上采用两种形式,并给出确定组合凹模几何参数的两种方法,最后提出用组合模具结构代替整体模具结构的设计原则,使冷镦螺栓凹模达到较高寿命。
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Cold upset female die of fillister head is the key mold in the manufacturing process of heading bolt.It is found through experiments that there exists three-dimensional stress in the heading process of an integrative die which tends to make the die crack and fail in the earlier period.To avoid stress concentration,the composite structure in two forms with three layers collar is used instead of the integrative type.Furthermore, in this article,the two methods to get the geometry parameter of a integrative die are given out,the design principles of the composite structure replacing the integrative type is put forward to make head die of bolt reach a longer service life.
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作者简介：
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参考文献：
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[1]Timoshenko S,Gere J.Mechanics of materials[M].VanNostrand Reinhold Company,1972.
[2]上海标准件公司教育处.冷镦工艺学[M].上海:科学技术文献出版社,1993.
[3]王学文,刘汉贵.挤压组合模的设计[M].北京:国防工业出版社,1988.
[4][苏]波波夫,张德呈译.自动化冷镦生产的工艺装备[M].沈阳:沈阳标准件研究所,1983.
[5]中国机械工程学会锻压学会编.锻压手册(第二卷)[M].北京:机械工业出版社,1993.
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