1976年由美国引进应用在本钢南芬露天矿120C汽车上的关键备件轮胎,进口单价1.4万美元,过去一直靠进口,每年都要消耗大量外汇。同时,还由于供货不及时,严重影响矿山生产。因此,我厂开展了120C汽车轮胎钢圈的研制工作。该部件结构并不复杂,但气密性要求非常严格,因为它是在与汽车轮胎紧密相接后充入超过0.5MPa的气压,承受200多吨(重载)重 Imported by the United States in 1976, the key spare parts tire used on the 120C car of the Benfang Nanfen surface mine was imported at a unit price of $ 14,000. In the past, it had been relying on imports and consumed a large amount of foreign exchange each year. At the same time, but also due to supply is not timely, seriously affecting the mine production. Therefore, I plant to carry out the 120C car tire rim research and development work. The structure of the part is not complicated, but the air tightness is very strict, because it is inflated with air pressure exceeding 0.5MPa after it is closely connected with the automobile tire, and it can withstand more than 200 tons heavy load