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图1所示鸡心夹头使用较普遍,但为避免损坏工件,需加垫块。比较麻烦。图2的螺纹孔鸡心夹头也不易卸下工件。为此,我们设计了图3所示的鸡心夹头。它由下夹片3和上夹片4组成,销轴1连接,两夹片可自由张合。螺纹部分拧入,受切削力后工件顶紧在鸡心夹头螺孔底面。加工完毕用扳手旋松螺栓5,工件即可取下。
Figure 1 shows the use of the heart of the common chick, but in order to avoid damage to the workpiece, need to add pad. kind of hard. Figure 2, the threaded hole center chuck is not easy to remove the workpiece. To this end, we designed the chick in Figure 3. It is composed of the lower clip 3 and the upper clip 4, the pin 1 is connected, and the two clips can be freely opened and closed. Thread part of the screwed in, by the cutting force after the top of the workpiece in the heart of the screw chuck hole bottom. After processing, unscrew the bolt with a wrench 5, the workpiece can be removed.