我厂生产的5吨至100吨箱形桥式起重机中,每一个滑轮部件都有一个涨圈,其形状如图1所示。原来生产的各种规格涨圈是采用无缝钢管车削而成,这种工艺方法的缺点是材料的浪费较大,材料利用率仅25%左右。而且硬质合金割刀片损坏率较高,机床功率消耗大,生产效率低,劳动强度高。针对这种情况,我们根据三轮滚压成形的原理,试制了一台滚压机,将截面尺寸为10×6mm的45号键钢条料滚 I plant the production of 5 tons to 100 tons of box-type overhead cranes, each pulley components have a ring up, the shape shown in Figure 1. The original production of various specifications ring is seamless steel turning, this method has the drawback of material waste, material utilization is only about 25%. And carbide cutting blade damage rate is higher, the machine power consumption, low productivity, high labor intensity. In view of this situation, according to the principle of three rounds of rolling forming, we made a roller press to make the 45th bar strip with the size of 10 × 6mm