main reason

(2) the turning tool is installed too high or too low; (3) workpiece clamping is not strong; (4) turning tool wear is too large (1) the tool is too large anterior horn, machine tool X-axis screw gap; ; (5) cutting too much.

 Solution

(1) to reduce the turning angle, maintenance of machine tool to adjust the X-axis screw clearance, the use of CNC lathe automatic compensation of the screw gap compensation machine tool X-axis screw clearance;

(2) the tool is installed too high or too low: too high, then eat a knife to a certain depth, the tool after the knife face to withstand the workpiece, increasing friction, and even the top of the workpiece bending, Too low, the chip is not easy to discharge, turning the direction of the radial force is the center of the workpiece, coupled with cross screw and nut clearance is too large, resulting in deepening the knife to keep the depth of the automatic tendency to lift the workpiece, At this point, should be promptly adjust the turning height, so that the tip and the workpiece axis high (can use tailstock top knife). In roughing and semi-finishing, the tip position is about 1% higher than the center of the workpiece (D means the workpiece diameter).

(3) workpiece clamping is not strong: the rigidity of the workpiece itself can not withstand the cutting force when turning, resulting in excessive deflection, changing the tool and the workpiece center height (the workpiece is elevated), the formation of cutting depth sudden increase , There Zakao, this time the workpiece should be firmly fixed, you can use tailstock top, etc., to increase the workpiece rigidity.

(4) Tool wear is too large: causing increased cutting force, the top bending parts, there Zaodao. At this point should be grinding tool to be.

(5) cutting the amount of (mainly back to eat the amount of knife and cutting speed) is too large: According to the workpiece 5 lead size and workpiece rigidity to select a reasonable cutting amount.