Three-dimensional spiral line grinding method through ultrasonic vibration

Abstract

The invention provides a three-dimensional spiral line grinding method through ultrasonic vibration, which is applicable to high-efficiency precision machining of difficult-to-cut materials. Two-dimensional ultrasonic vibration is applied to a workpiece in the axial direction of a grinding wheel and in the radial direction of the grinding wheel on a common grinder by an ultrasonic transducer, so that the workpiece is in ultrasonic elliptic vibration. As the grinding direction is perpendicular to a plane of ultrasonic elliptic vibration, cutting tracks of abrasive particles relative to the workpiece are three-dimensional spiral lines. The tracks of the abrasive particles on the surface of the workpiece interfere with each other by the aid of the ultrasonic vibration in the axial direction of the grinding wheel, so that roughness is reduced. Besides, the maximum cutting depth of the abrasive particles is increased by the aid of the ultrasonic vibration in the radial direction of the grinding wheel, and the abrasive particles function in intermittent cutting, so that grinding force is reduced, and material removing rate is increased. The method can be used for improving machining surface quality, decreasing surface damage and improving production efficiency, thereby being applicable to high-efficiency precision machining of the difficult-to-cut materials.

Description

technical field [0001] The invention relates to an ultrasonic vibration three-dimensional spiral grinding method, which is suitable for high-efficiency and precise machining of difficult-to-machine materials. Background technique [0002] Difficult-to-machine materials such as ceramics, semiconductor substrates, sapphire substrates, hard alloys, and high-speed steels are increasingly used in aviation, electronics, optics, and automotive industries. The traditional grinding process will inevitably produce serious process deterioration layer and surface cracks. During the grinding process, large grinding force and high grinding temperature will be generated, which will aggravate the wear of the grinding wheel and the damage of the machined surface. On the one hand, it is necessary to repair and replace the grinding wheel in time. On the other hand, in order to remove processing defects and improve the surface finish, a long period of follow-up finishing processing is required,...

AI Technical Summary

Problems solved by technology

The other is one-dimensional radial ultrasonic vibration grinding, that is, the ultrasonic vibration direction is along the radial direction of the grinding wheel. Its main feature is that it can significantly reduce the grinding force and improve the material removal rate, but it will lead to increased wear of the grinding wheel and surface roughness. slight increase in degree

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