自动车中心架夹头(下称中心夹)孔径的磨损是报废的主要原因。能否将报废的中心夹通过扩孔的办法重新加工使用,关键是要有一个简单易行的办法来保证重新加工中心夹时有足够的定位精度,以使加工后的中心夹有较高的同轴度。我们对MG1107自动车中心夹进行了试验,取得了较好的效果。具体做法是:加工中心夹时在其端面车制一个环形槽(槽宽1mm、深0.8mm,环形槽直 Automatic car center frame chuck (hereinafter referred to as the center folder) aperture wear and tear is the main reason scrapped. Whether the scrapped center clamps can be reworked by reaming the key is to have a simple and easy way to ensure sufficient positioning accuracy when re-machining the center clamp so that the center after machining has a higher Concentricity. We test the MG1107 automatic car center clip, and achieved good results. The specific approach is: machining center clip in its car when the end of an annular groove (groove width 1mm, 0.8mm deep, annular groove straight