泵体孔加工的工艺改革一汽集团公司为改善汽车驾驶条件，在平头车离合器踏板部分增加了助力机构，有总泵和分泵两个小总成。在试制和试产中，这两个技术要求与液压油缸相似的灰铸铁泵体孔采用普通车床和一般刀具加工，然后在钻床上用油石条历磨孔，但其尺寸、表面粗糙度和... Pump hole machining process reform FAW Group Corporation to improve the driving conditions of the car, the tipper clutch pedal part of the increase in the auxiliary body, a master cylinder and sub-pump two small assembly. In both trial and trial production, these two technologies require gray cast iron pump housings similar to hydraulic cylinders to be machined using normal lathes and general tools, followed by drilling with boulders on a drill press, but with dimensions, surface roughness and. ..