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我们与夭津第三纺织配件厂、塘沽机床联接件厂、天津第六内燃机配件厂等单位共同对钢零件冷挤压冲头结构进行了改进,提高冲头寿命5～10倍多。在钢零件冷挤压生产中,由干变形抗力大、冲头受力情况恶劣,寿命很低,平均寿命1～2千件,最高也只有1万件左右,影响了这种先进工艺的广泛采用。目前冲头较普遍的形式如图1所示,冲头的损坏在钢零件挤压中以折断形式损坏几乎占70～80％,且折断部位与形式大都相
We and the third mill Yaosun Textile Parts Factory, Tanggu Machine Tool Link Factory, Tianjin Sixth Internal Combustion Engine Parts Factory and other units together on the cold extrusion of steel parts punch structure has been improved to improve the punch life of 5 to 10 times. Cold extrusion in the production of steel parts, by the large deformation resistance, punch bad situation, life expectancy is very low, the average life of 1 to 2 thousand, the highest is only about 10,000, affecting the extensive advanced this process use. At present, the more common punch form as shown in Figure 1, the punch damage in the extrusion of steel parts to break the form of almost 70 to 80%, and most of the fracture site and form