图1所示工件是解放牌CA141汽车发动机气缸体前主轴承盖和中间主轴承盖加工两个φ14.8的螺栓过孔的工序简图。在开发该项产品时,我采用圆偏心夹紧机构,设计了如图2所示的偏心顶紧钻夹具。操作时,先拉出活动V形块,转动偏心轴,使夹紧块处于较低位置。将工件置于夹紧块上,并卡入固 Figure 1 shows the workpiece is Jiefang card CA141 car engine cylinder front main bearing cap and the middle main bearing cap processing two φ14.8 bolt through hole process diagram. In the development of the product, I use the eccentric circular clamping mechanism, designed as shown in Figure 2 eccentric top tight drilling fixture. In operation, first pull out the active V-shaped block and turn the eccentric shaft so that the clamping block is in the lower position. Place the work piece on the clamping block and snap it in