矿用金属支柱模锻件“楔块”(见图一),小爪间距24_(-0.5)~(+1)及32.5~(+1.5),要求较严。弯爪工序成为煤矿机械制造行业生产此锻件的关键。各厂生产中所采用工艺、工装不同,有的厂在专用设备——滚边机上弯爪,也有在摩擦压力机上,其模具的上下模分别为正体整形模结构。经改进后,我厂现在的弯爪工序是在JB23——80型开式双柱可 Mining metal prop forgings “wedge” (see Figure 1), small claw spacing 24 _ (- 0.5) ~ (+1) and 32.5 ~ (+1.5), more stringent requirements. Bending process to become the coal mining machinery manufacturing industry forgings the key. The production process used in the plant, the tooling is different, and some plants in the special equipment - trimmers claw, but also in the friction press, the mold of the upper and lower mold were orthopedic mold structure. After the improvement, I now plant bending process is JB23--80 open double column can be