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为解决解放牌汽车前梁锻模寿命短的问题,我们做了大量的试验,取得了一些成绩,现介绍如下。一、锻模寿命短的原因我厂的前梁锻模材料是5CrNiMo 钢。每副模具净重4.5吨,价值二万多元。自开工生产以来,从未有过因为型槽尺寸超差而报废的。85～95%是因法兰盘处产生裂纹,5—15%是因塌陷而使型槽报废。第一次型槽报废后的锻模,过去是翻新后再用。翻新方法是,把型槽深度万向的1/2部分刨掉(约50mm),重加工型槽。以后,如再产生裂纹就再翻新。一套模具约可翻新3～4次,待模体薄得难以翻新了才予报废。一次型槽的寿命定额约1300件,这实在太短了。原因在哪里?1.一副新锻模工作到700～900根前梁
In order to solve the problem of short lifespan of Jiefangpai Automobile Front Beam Forging Die, we did a lot of tests and made some achievements. Now we introduce the following. First, the reason for the short die life I forging beam former material is 5CrNiMo steel. The net weight of each mold 4.5 tons, the value of more than 20,000 yuan. Since the start of production, there have never been scrapped due to the size of the groove. 85 ~ 95% is due to cracks in the flange, 5-15% is due to collapse groove recess. Forgings after the first slot rejection, the past is refurbished and then use. The method of renovation is to platen the half of the depth of the groove (about 50 mm) and rework the groove. In the future, such as cracks and then re-renovated. A set of molds can be renovated about 3 to 4 times until the mold body is too thin to renovate before it is scrapped. A groove-type life of about 1300, which is too short. The reason why? 1 a new forging work to 700 ~ 900 before the beam