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用硬质合金做自动冷镦机上的模具,可以将使用寿命提高9倍左右。但硬质合金的加工与装配工艺性差、价格贵,特别是在拉应力作用下,强度很低,所以用作冷镦模时,要采取一些特别措施。一般的措施是采用预应力镶块结构,即把硬质合金模做成镶块,用热装或冷压的方法,以一定的过盈量组合在紧固套内。苏联普罗科皮耶夫斯克矿山自动机厂
Carbide to do with automatic cold heading machine die, you can increase the service life of about 9 times. However, the processing and assembly of cemented carbide poor, expensive, especially in the tensile stress, the strength is very low, so when used as cold heading die, to take some special measures. The general measure is the use of prestressed insert block structure, that is made of carbide die inserts, with hot or cold pressure method to a certain amount of interference in the fastening sleeve. Soviet Prokopyevsk mine automatic factory