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首钢中型轧钢厂是1979年利用旧设备建立起来的。由于设备不配套,装备水平低,技术状况较差,生产只达到年产5万吨水平(两班生产)。为生产发展的需要,我们对设备的薄弱环节进行了改造,1982年突破10万吨大关(三班生产),但是又暴露了500轧机主机列能力不足的新问题。我们于1934年8月更换了减速机和人字齿轮座,改造并增加了悬臂式托架,1987年产已达到15.5万吨。
Shougang medium-sized rolling mill was built in 1979 with the use of old equipment. As the equipment is not complete, low level of equipment, technical conditions are poor, the production only reached an annual output of 50,000 tons level (two classes of production). In order to meet the needs of the development of production, we have reformed the weakest link of the equipment. In 1982, we broke through the 100,000-ton mark (three shifts) but exposed the new problem of insufficient capacity of the main train of 500 rolling mill. We replaced the reducer and the herringbone gear carrier in August 1934, retrofitted and added the cantilever bracket, which reached 155,000 tons in 1987.