我厂生产的拖拉机大小轮圈,原来采用热轧加工。这种加工方法的燃料消耗量很大,操作环境温度较高,而成品的合格率却很低,大小轮圈仅40％与70％。一九七○年以来,我厂先后设计制造出体积小、重量轻、结构简单、操作方便的行星式大小轮圈冷滚机。与原热轧工艺相比,生产率 I plant the size of the tractor wheel, the original use of hot-rolled processing. This method of processing a large amount of fuel consumption, operating temperature higher, while the finished product pass rate is very low, the size of the rim only 40% and 70%. Since 1970, our factory has designed and manufactured a small size, light weight, simple structure, easy operation of the planetary size of the wheel roll machine. Compared with the original hot-rolled process, productivity