唐山机器厂在制造650公厘薄板轧钢机时,职工们打破保守思想,破除迷信,在技术革命运动中刻苦鑽研,与唐山钢厂合作,利用现有的小容量冶煉设备,以焊接方法制造成功轧钢机中的大铸钢件——机架。这种化大为小,拼小成大制造轧钢机机架的方法,在国内还是创举。轧钢机机架如果用正规的方法制造,需要容量20吨以上的平炉才能浇铸,但整个唐山市都没有这样的大设备。唐山机器厂的职工没有被吓倒,他们千方百计地利用现有条件为完成这个光荣任务而努力,终于在群众的献计献策中创造了“化大为小,拼小成大”的方法,把机架分为两片分别铸造出来,再焊成整体。但这样做每片铸件的重量还有10吨左右,负责供应毛坯的唐山钢厂的冶煉设 Tangshan Machinery Factory in the manufacture of 650 mm thin-plate rolling mill, the workers break the conservative thinking, get rid of superstitions, hard work in the technological revolution movement, and Tangshan Iron and Steel Works, the use of existing small-capacity smelting equipment, welding methods to create success Large steel castings in the rolling mill - stand. This kind of large-scale, small-scale manufacturing rolling mill rack method is still in the country. Rolling mill machine frame if you use the normal method of manufacturing, requires capacity of more than 20 tons of open hearth furnace can cast, but the entire Tangshan City are not such a large equipment. The employees of Tangshan Machinery Factory have not been intimidated. They make every effort to use existing conditions to work hard to accomplish this glorious task. At last, they have created a method of “turning things small into small ones and small ones into big ones” Stand divided into two pieces were cast out, and then welded into the whole. But in doing so, the weight of each piece of castings is about 10 tons, responsible for the smelting of the Tangshan Steel Works