在车床上车制薄片形零件,若采用调头加工法装卡困难,一般需自制开口胀胎,或软三爪。现介绍两种可加工外圆的胎具。如零件内孔带有螺纹时可制作如图1的胎具,此胎具是由开口套、弹簧、螺杆组成。加工时将零件拧在螺杆上,并推紧螺杆,使零件与开口套端面贴紧,用三爪卡紧便可加工。 In the lathe car-made sheet-shaped parts, if the use of U-turn chucking method, generally need to make open mouth inflation, or soft three claws. Now introduce two kinds of machinable cylindrical tire. Such as parts with holes in the hole can be made as shown in Figure 1 of the tire, the tire is composed of an open sleeve, spring, screw. When processing the parts screwed on the screw, and tighten the screw so that the parts and open sets of the end face close together, with three claw card can be processed.