摘要
采用工程法对连续挤压铜排的力能进行了计算,得到了连续挤压铜排模腔入口挤压应力的解析表达式及挤压应力随产品厚度和宽厚比变化的规律。考虑到溢料和堵头对挤压轮产生的扭矩,对204.5mm×7.5mm铜排连续挤压的功率进行了计算,并将其与实验中的实测值进行比较,二者误差为12%,能满足工程计算的需要。因此,该方法可为模具设计和合理选择铜排连续挤压设备提供参考。
The pressure and power required by continuous extrusion of copper bus bar was calculated and the analytical expression of the inlet stress of the extending mould was obtained herein.The analytical expression shows the rules of the pressure changing with the variation of thickness and flakiness ratio of products.Taking the torque caused by flash of metal and plug into account,the power required by continuous extrusion of copper bus bar with a specification of 204.5mm×7.5mm was calculated by employing the proposed method,and the results show good agreement with the experimental values.The error of calculation is 12%,and is able to meet the engineering application.Therefore,the proposed method can provide reference for the design of extrusion mould and rational selection of copper bus bar continuous extrusion machine.
出处
《中国机械工程》
EI
CAS
CSCD
北大核心
2012年第21期2630-2633,共4页
China Mechanical Engineering
基金
国家自然科学基金资助项目(50870455)
云南省自然科学基金资助重点项目(2007E0013Z)
关键词
连续挤压
铜排
工程法
挤压力能
continuous extrusion
copper bus bar
slab method
extrusion pressure and power
