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摘要：
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针对某精密零件加工成形中存在的难点,分析了目前所使用的冷挤压模具结构中存在的飞边大、模具寿命低等问题,提出了模具结构改进措施。改进后的模具将凹模的结构形式由原来的整体式改变为分体式结构,即定位部分与凹模部分分开。改进后的模具解决了凹模内两侧及底部表面粗糙度不易加工以及分体结构带来的飞边问题,提高了模具寿命。通过试模证明,该模具生产出的零件表面质量好,精度满足要求,模具寿命也由原来的12件增至现在的100件。
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In view of the forming process difficulty of the high precision part,the problems of the present cold extruding die,such as big flash and low service life were analyzed.A practical improving measure about the die structure was put forward.The die structure was changed from the integral structure to the separation structure,which means that the orientation part and the die part were separated.Then the problems of the inconvenient handling of surface roughness on the two sides and at the bottom of the die and the flash were resolved and the die service life was improved.The tryout shows that the product has high surface quality and the dimensional accuracy meets the requirements.Through the actual production verification,the service life of the cold extruding die is greatly extended from 12 to 100 pieces.
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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]虞传宝.冷冲压及塑料成形工艺与模具设计资料[M].北京:中国标准出版社,1993.
[2]郑大中.模具结构图册[M].北京:机械工业出版社,1995.
[3]王孝培.冲压手册[M].北京:轻工业出版社,1988.
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