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在本刊上期36頁中,已經介紹了我厂使用的預精加工的空心鏜杆,現在再來介紹我厂加工水泵渦形体內凹沟用的切沟空心鏜杆。这空心鏜杆的結构如附图所示,它的使用范圍及所用机床与預精鏜杆相同。使用时,将鏜杆A端插入床头主軸退拔孔里,用銷軸卡住,以便由床头主軸带动旋轉。B端支在鏜床尾座軸承孔里,或支在工件(泵体)填料孔里。当B端支在工件填料孔里吋,要在B端装一軸承套。这軸承套的內徑与鏜杆上B部分滑动配合,外徑及长短尺寸要与工件填料孔相同。因为工件太长而且沟数多,所以鏜杆上裝有两个刀盘,以减少栘动位置;工作时,用一
On page 36 of this issue, we have introduced the pre-finished hollow boring bar used in our factory. Now we will introduce the hollow boring bar used in our factory to process the concave groove of the water pump body. The structure of this hollow boring bar is shown in the attached drawing. Its use range and the same machine as the pre-boring bar. Use, the boring bar end A inserted into the bed spindle retract hole, with the pin stuck in order to rotate by the bed spindle. B end support in the boring tailstock bearing hole, or in the workpiece (pump) filler hole. When the B end support in the workpiece filler hole inch, to be installed in a B-bearing sleeve. The inner diameter of the bearing sleeve and the boring bar on the B part of the sliding fit, the outer diameter and length of the size of the same hole with the workpiece filler. Because the workpiece is too long and the number of ditches, so the boring bar is equipped with two cutterhead to reduce the move position; work, with a