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力学与实践 ›› 2006, Vol. 28 ›› Issue (1): 0-0.doi: 10.6052/1000-0992-2004-341

• 应用研究 •    

一种提高冷镦件模具寿命的设计方法

王凤才 祝文琴   

  1. 江阴职业技术学院 江阴职业技术学院
  • 收稿日期:2004-09-23 修回日期:2005-06-02 出版日期:2006-02-10 发布日期:2006-02-10

A DESIGN METHOD TO EXTEND THE LIFE OF A MOLD BY COLD UPSET PUNCHING BOLT

  • Received:2004-09-23 Revised:2005-06-02 Online:2006-02-10 Published:2006-02-10

摘要: 针对采用整模结构的冷镦模具疲劳寿命极低的现状,提出以三层圆筒组合模具结构 替代整体模具, 改变模具受力方式, 使冷镦件模具达到较高寿命的设计方法. 以螺栓 圆头的冷镦试验结果为依据,以力学的应力分析方法为基础,应用力学理论,导出了生产实 践中实用的组合模具设计原理与经验公式,并举例说明了该方法的应用.

关键词: 冷镦,凹模,应力集中,疲劳寿命,过盈量

Abstract: In view of the fact that for the cold upset mold of the whole-mold structure, the fatigue life is rather short, a new design method is proposed to replace the whole mold with the mold structure of a three-layer cylinder and thus to change the loading on the mold and to achieve a longer life. According to the testing results of cold upset bolt and the results of stress analysis, empirical formulas are obtained.

Key words: cold upset bolt, concave mold, stress concentration, fatigue life, overflow