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汽车发电机爪极精锻模具开裂分析及结构改进
英文标题:Cracks analysis and structure improvement of claw pole precision forging die used in automobile generator
作者:田辉 王雷刚 庄晓伟 孙跃 
单位:江苏大学 江苏龙城精锻有限公司 
关键词:爪极 精密锻造 模具开裂 有限元模拟 
分类号:TG315.2
出版年,卷(期):页码:2012,37(3):163-166
摘要:

针对发电机爪极在精锻成形中,承受载荷大、模具应力高、模具易开裂、寿命低等难题,采用有限元三维模拟软件Deform-3D分析了爪极精锻成形过程和模具的受力状态。研究结果表明,局部应力过大是模具开裂的主要原因。在此基础上,提出了加深预锻型槽爪尖处以及在终锻型槽爪尖处增设溢流孔等模具结构改进措施,使模具容易开裂部位的应力下降44.2%,从而提高了模具的使用寿命。

The simulation method was used to settle the problems including  great load, high stress, cracks and low life of upper die. With the analysis of 3D simulation software Deform-3D, the precision forging forming process of claw pole and stress state of the mold were analyzed. The results show that the main reason for die cracks is the overlarge local pressure. The stress in the part where the cracks appeared easily was reduced by 44.2% through improving the structure of top die, such as deepening groove of claw pole in pre-forging and adding overflow hole in finish-forging. As a result, the life of top die is prolonged.

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