在孔加工中,新型高精设备层出不穷,但在小型的加工厂或企业内,通常采用经济的小型通用设备进行加工制造。石家庄中煤装备制造有限公司某厂在加工一种阻尼器体工件(见图1),此产品的月定量在10万件以上,需要加工2个有深度公差要求的盲孔φ8_0~(+0.036)和φ7_0~(+0.022),由于各尺寸的累计误差影响,深度尺寸难以控制,单班产量仅维持在百余件, In the hole machining, new high-precision equipment after another, but in small processing plants or businesses, usually using economical and small general-purpose equipment for manufacturing. Shijiazhuang Coal Equipment Manufacturing Co., Ltd. a factory in the processing of a damper body artifacts (see Figure 1), the monthly product of this product in more than 100,000, the need to process two blind holes with depth tolerance φ8_0 ~ (+0.036 ) And φ7_0 ~ (+0.022). Due to the accumulated error of each size, the depth size is difficult to control. The output per class is only maintained at more than 100 pieces,