Double-laser trimming device and method for grinding wheel

Abstract

The invention discloses a double-laser trimming device for a grinding wheel. The trimming device comprises a nanosecond pulse laser, a femtosecond pulse laser, a laser beam expander, a first focusinglens, a second focusing lens and a pulse liquid column flow generator; a laser beam output by the nanosecond pulse laser is subjected to beam expanding treatment by the laser beam expander, then is output by the first focusing lens and acts on the surface of the trimmed grinding wheel, and tangential flattening and radial dressing of the grinding wheel are realized; a laser beam output by the femtosecond pulse laser is focused by the second focusing lens and then acts on the surface of the trimmed grinding wheel, and the grinding wheel is trimmed. The double-laser trimming device which is usedfor the grinding wheel and is based on an auxiliary pulse liquid column flow and the beam expander is put forward, the cost is saved, plasma particles are inhibited from returning to the surface of the grinding wheel, and the phase explosion effect is avoided; in the process of reshaping diamond grits on the surface of the grinding wheel, the defects such as hot cracks, graphite metamorphic layers and the like caused by heat accumulation around the diamond grits are avoided through quick cooling, and thus the trimming efficiency and the trimming quality are greatly improved.

Description

technical field [0001] The invention belongs to the technical field of superabrasive grinding wheel dressing, and more specifically relates to a grinding wheel double laser dressing device and a dressing method. Background technique [0002] With the development of new materials, the processing requirements for materials are getting higher and higher, and it is difficult for ordinary abrasive grinding wheels to meet the requirements of difficult-to-machine materials grinding, precision and ultra-precision grinding. Superabrasive grinding wheels (cubic boron nitride (CBN) and diamond grinding wheels) have higher grinding accuracy, more stable and better grinding performance than ordinary abrasive grinding wheels, and their wide application has accelerated the development of grinding and innovation. There are many types of superabrasive grinding wheels, among which the most common one with the highest bonding strength is the bronze bonded diamond grinding wheel. It has the c...

AI Technical Summary

Problems solved by technology

[0006] In order to overcome the deficiencies and defects of the prior art, the present invention provides a grinding wheel double-laser dressing device and a dressing method, aiming to solve the problem that the existing dressing device cannot simultaneously solve the problems caused by plasma, evaporation, phase explosion and other effects in the dressing process. Technical problems leading to poor surface quality of grinding wheels and poor grinding performance due to defects such as abrasive grain thermal cracks and graphite metamorphic layers

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