在化工、阀门、仪表等机械制造中,经常会遇到光洁度及精度要求较高的同轴阶梯深孔的加工,尤其当阶梯孔的直径逐渐递减到较小尺寸,而其同轴度要求甚高;零件重量较大;其材质为难加工的1Cr18Ni9Ti奥氏体不锈钢时,往往给加工带来很大困难,我厂在某系列产品中,有一关键件如图1所示,此件由数件组焊而成,其中镶入了1Cr18Ni9Ti件,为达到φ35H12、φ30H8、φ20H8、φ16H8各孔的同轴度及光洁度,我厂通过生产实践,采用较为简易的工艺手段,达到了图纸要求。 In the chemical industry, valves, instruments and other machinery manufacturing, often encounter the requirements of the finish and coaxial coaxial deep hole processing, especially when the step hole diameter gradually reduced to smaller size, and its coaxiality requirements High; parts weight larger; its material is difficult to process 1Cr18Ni9Ti austenitic stainless steel often bring great difficulties to the processing, I plant in a series of products, there is a key piece shown in Figure 1, this piece consists of several pieces Group welding which, set in 1Cr18Ni9Ti piece, in order to achieve the φ35H12, φ30H8, φ20H8, φ16H8 each hole of the coaxiality and finish, I plant through the production practice, using a more simple process, to meet the drawings requirements.