三爪卡盘是车床自动定心夹具,在长期使用当中,由于平面螺纹、卡爪传动面以及爪口磨损,普遍存在喇叭口形(即外大内小)和偏心,如图1所示。我们根据图2所示方法对卡爪进行修磨,为此设计了一只套,如图3所示。套中三个方槽按卡爪厚度设计,可大于卡爪厚度0.5mm左右;六处斜面按卡爪的爪口斜面设计;内孔φ大小要使卡爪口露出即可; Three-jaw chuck is a lathe automatic centering fixture, in the long-term use which, due to the plane thread, jaw drive surface and claw mouth wear, widespread trumpet-shaped (ie large outer small) and eccentric, as shown in Figure 1. We grind the jaws according to the method shown in Figure 2, and a sleeve is designed for this purpose, as shown in Figure 3. Set of three square groove claw according to the thickness design, greater than the claw thickness of about 0.5mm; six beveled claw jaw claw mouth bevel design; bore hole size to make the claw mouth can be exposed;