改进了40Cr高强度螺栓的冷挤镦工艺,拟制了冷挤镦工艺前的毛坯处理工艺.针对生产中出现的倒角质量差的问题,提出了改进后的螺栓冷挤镦模具结构.%The cold extrude-upsetting process of the 40Cr high-strength bolt has been improved in the text,and the heat treatment process before the cold extrude-upsetting process has been drawn up. The die structure has been improved in order to solve the bad corner quality occurring in the production.
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