我们厂承担着国家很多起重运输机械的锻件,特别是75吨双钩和70吨单钩的锻造。过去,在锻造吊钩时需使用吊车和大钳子,劳动强度大,生产率低,又不够安全。从使用操作机后,虽然解决了轴类件及拔长、镦粗、冲孔、扩孔等工艺的机械化操作,但若使用不带水平旋转的有轨操作机,则无法进行对吊钩的锻造。在学习无产阶级专政理论群众运动的有力推动 Our factory undertakes forgings of many national lifting and transport machinery, especially forging of 75 tons of double hooks and 70 tons of single hooks. In the past, cranes and big pliers were used when forging hooks, which led to high labor intensity, low productivity and not enough safety. After using the manipulator, although the mechanized operation of shaft parts and processes such as drawing, upsetting, punching and reaming has been solved, the use of a rail manipulator without horizontal rotation makes it impossible to operate the hook forging. In promoting the proletarian dictatorship theory of mass movement