High-speed separation ultrasonic vibration cutting control method

Abstract

The invention relates to a high-speed separation ultrasonic vibration cutting control method which, by using an ultrasonic vibration cutting device including a closed-loop DDS, controls a cutter to achieve vibration including the vibration in the direction perpendicular to the cutting speed direction in a cutting process, and simultaneously controls a phase difference of the motion trajectories oftwo adjacent cutters in the cutting direction so as to causes pits caused by the lateral vibration in the motion trajectories of the two adjacent cutters to be staggered and overlapped, thereby reducing the deterioration of the surface roughness caused by the vibration perpendicular to the cutting speed direction. Since the ultrasonic vibration includes a component perpendicular to the cutting speed direction, the cutting speed is not limited by an ultrasonic vibration cutting separating condition and thus high-speed ultrasonic vibration cutting can be achieved. By controlling the phase difference, it is possible to simultaneously satisfy the high speed cutting and the surface roughness.

Description

technical field [0001] The invention relates to a high-speed separation ultrasonic vibration cutting control method. Background technique [0002] see figure 1 , the traditional ultrasonic vibration cutting is to apply ultrasonic vibration to the tool in the direction of cutting speed, which is called ultrasonic longitudinal vibration. At the same time, figure 1 The tool trajectory is also shown in . Ultrasonic vibration cutting realizes the periodic separation of the cutting edge of the tool and the chips of the workpiece, thereby reducing the cutting force, improving the quality of the machined surface, and prolonging the life of the tool. Therefore, it is widely used in the cutting of difficult-to-machine materials. However, in the traditional ultrasonic vibration cutting process, in order to maintain this periodic separation effect, there is a critical cutting speed v c , the critical cutting speed v c satisfy the following formula: [0003] v c = 2πF·A [0004] A...

AI Technical Summary

Problems solved by technology

However, this processing method is affected by ultrasonic vibration and spindle runout, which will cause roughening of the processed surface, which does not meet the requirements for surface roughness.

[0006] In summary, the existing ultrasonic vibration cutting technology cannot meet the requirements of high-speed cutting and surface roughness at the same time.

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