Ceiling Light,Rectangle Delicate Ceiling Light,Round Crystalceiling Light,Bedroom Decoration Ceiling Light ZHONGSHAN DIKA LIGHTING CO.,LTD , http://www.dikalighting.com When processing the workpiece shown in Figure 1, we started machining on a horizontal lathe with a single knife. Due to the deep and wide annular groove, the machining allowance is large and the production efficiency is very low. Only 40 pieces per shift can be produced. Later, we solved the problem by making a shank on a scrapped turret-type turret lathe. The production efficiency has been greatly improved, and the output of the class has increased to 100 pieces.