Failure analysis and solution of turning buckle

Failure analysis and solution: The reason is that when the screw rotates once, the workpiece does not rotate through an integer.
1. When the ratio between the screw pitch of the lathe and the thread pitch of the workpiece is not an integral multiple, if the opening and closing nut is used when the tool is retracted, the bed saddle is shaken to the starting position, then when the opening and closing nut is closed again, the turning tool will occur The tip of the knife is not in the spiral groove pulled out by the previous knife, so that there is a mess. The solution is to use the positive and negative turning method to retract the tool, that is, at the end of the first stroke, without lifting the opening and closing nut, after the tool is retracted in the radial direction, the spindle is reversed, the turning tool is retracted in the longitudinal direction, and then the first The second stroke, so that in the reciprocating process, because the transmission between the main shaft, the screw and the tool holder has not been separated, the turning tool is always in the original spiral groove, and there will be no buckling.
2. For turning parts, the threaded workpiece and the screw with the ratio of the screw pitch to the woman's pitch are all rotating. After lifting the opening and closing nut, wait at least one rotation of the screw to re-close the opening and closing nut , So that when the screw rotates one turn, the workpiece rotates an integer multiple, the turning tool can enter the spiral groove of the previous tool turning, there will be no clasp, so you can use the opening and closing nut to manually retract the tool . This way the tool is retracted quickly, which is conducive to improving productivity and maintaining the accuracy of the screw, and the screw is also safer.