Combined precise trimming device and trimming method for ultrahard grinding sand wheel

Abstract

The invention discloses a combined precise trimming device and trimming method for an ultrahard grinding sand wheel. The method comprises a first step: grinding water jet rough trimming, specifically, an ultrahard grinding sand wheel and a trimming wheel are enabled to rotate at a certain speed, and the grinding sand wheel is enabled to feed in a reciprocation manner at a constant speed along an axial direction, meanwhile, the grinding water jet trimming device jets a grinding water jet into a gap formed by the ultrahard grinding sand wheel and the trimming wheel along a direction vertical to an axis of the grinding sand wheel, and the grinding water jet impacts the surface of the ultrahard grinding sand wheel, such that a finished sand wheel bonding agent is crushed and abrasive particles fall off; a second step: contact type fine trimming, specifically, when circle run-out of the sand wheel is reduced to certain extent, the circle run-out cannot be continuously reduced effectively by using the grinding water jet purely, and the trimmed ultrahard grinding sand wheel is used to perform fine trimming on stainless steel or cast iron. The abrasive particles with inconsistent heights are removed or ground off, such that the abrasive particles on the surface of the sand wheel tend to be consistent; and a third step: grinding water jet sharpening, specifically, performing final sharpening on the sand wheel by adopting low-pressure large-jet target distance grinding water jet.

Description

technical field [0001] The invention relates to the field of grinding wheel dressing, in particular to a composite precision dressing device for superabrasive grinding wheels and a high-pressure abrasive water jet and contact composite precision dressing method for superabrasive grinding wheels. Background technique [0002] A grinding wheel is usually composed of two parts: abrasive grains and a bond: the abrasive grains play a cutting role and are usually hard; the bond bonds countless abrasive grains together. Grinding wheels in which the abrasive grains are diamond or cubic boron nitride (CBN) are collectively referred to as superabrasive grinding wheels. Superabrasive grinding wheels have better grinding performance than ordinary grinding wheels, so superabrasive grinding wheels are widely used in high-speed and high-efficiency grinding, precision and ultra-precision grinding, profile grinding, grinding of difficult-to-machine materials and grinding automation and othe...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem of difficult dressing of large-grain superabrasive grinding wheels, to provide a composite precision dressing device for superabrasive grinding wheels, and to use high-pressure abrasive water jets and contact-type composite precision dressing methods. The type precision dressing device mainly proposes a new abrasive water jet dressing device

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