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我厂设计制造的HQ8型多用打气筒,其中有个零件需要加工一道内筋(如图1所示)。对此,我们经过多次试验,总结了一套新的加工方法,即在普通车床上加装一套专用的活顶针装置(见图2)。图2中的心轴2即为滚筋的心棒,心轴的外径尺寸应比筋的内径尺寸小0.3～0.5mm,为φ34.2_(0.1)mm。这里心轴的台阶起着工件轴向定位的作用,R槽的深度则根据内筋的高度而定。工作时,心轴插入工件,并使心轴外径与工件内径单边接触,滚压轮对准心轴上的R槽中心,并使滚压轮中心高出0.3～0.5mm,固定好各相互位置后,开动车床,摇动中拖板即可进行加工。注意事项: (1) 工件在滚压中有一定的延伸量,为此须松开
I HQ8 design and manufacture of multi-purpose pump, which has a part of the need to be processed within the ribs (Figure 1). In this regard, we have after many trials, summed up a new set of processing methods, that is, in the ordinary lathe to install a set of dedicated live thimble device (see Figure 2). The mandrel 2 in Fig. 2 is the rolling mandrel. The outer diameter of the mandrel should be 0.3 ~ 0.5mm smaller than the inner diameter of the mandrel, which is φ34.2 mm (0.1 mm). Here the mandrel plays the role of axial positioning of the workpiece, the depth of the R slot is based on the height of the rib. Work, the mandrel into the workpiece, and the mandrel diameter and unilateral contact with the workpiece diameter, rolling wheel alignment mandrel R groove center, and the rolling wheel center higher than 0.3 ~ 0.5mm, fixed After mutual position, start the lathe, shake in the carriage can be processed. Note: (1) The workpiece has a certain amount of extension in the rolling, for which to be released