我们生产的某设备上有一支进出料管,如图1,材料为1Cr18Ni9Ti。开始我们在T68卧式镗床上镗R277,由于该镗床主轴较细(φ85),刀杆伸出较长,振动很大,所以加工速度很慢,甚至几天才能镗出一个零件。为了提高生产率,我们设计了一个专用夹具,介绍如下: 夹具结构见图2,它由底板1、下夹紧板2、上夹紧 We have a production equipment out of the tube, shown in Figure 1, the material is 1Cr18Ni9Ti. At the beginning we bordered the R277 on a T68 horizontal boring machine. Due to its fine spindle (φ85), the boring bar extended a long way and vibrated so the processing speed was slow and even a few days required to boring a part. In order to improve productivity, we designed a special fixture, introduced as follows: fixture structure shown in Figure 2, which consists of the bottom plate 1, the lower clamping plate 2, the upper clamping