The influence of machining speed on machining of CNC gantry milling machine is analyzed.

Once the speed is greater than the limit of the spindle of the machine tool, some small problems existing in the machine tool will sometimes become serious problems. When metal cutting is processed by CNC planer milling machine, the spindle speed has a great influence on the machining process. In the low speed of spindle or common speed range, it has little effect on its machining quality.

Between cutting speed and machining quality, the choice of different cutting parameters will follow the law shown by cutting theory. In greater than the limit value or in the higher spindle speed processing, will cause the cutting temperature rise, the workpiece centrifugal force is larger, may also cause the vibration of the machine tool. The higher the spindle speed, the greater the force generated from the rotation axis outward stretching parts, mainly in finishing, centrifugal force has a greater impact on the spindle bearing.

CNC gantry milling machine machining machining speed fixed value, to ensure the machining parts accuracy, control machine tool spindle speed, through the control system command, to achieve constant cutting speed. The program is to control the dc motor or inverter three-phase motor speed to carry out constant speed instructions. With the reduction of machining diameter, in theory, the cutting speed can always increase, but at high speed, due to the radial force generated by the workpiece is too large, will lead to a sharp increase in the force of fixture, resulting in fixture and body damage and other accidents.

In machining parts, when the circular cutting speed is constant, the roughness of the workpiece surface after turning can be kept consistent, and the service life of the tool can be increased. After constant cutting speed is set, the spindle speed varies at different diameters of the workpiece being processed. When cutting large diameter parts, the spindle speed is low. At the small diameter of the workpiece, the spindle speed is higher. If the spindle speed is too high, the workpiece will have the danger of flying out, so you need to limit the spindle speed limit.

 

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