Device and method for ultrasonic brazing of super-hard abrasive grinding wheel

Abstract

The invention relates to a device and a method for ultrasonic brazing of a super-hard abrasive grinding wheel. A transducer of the device is connected to a power supply; the other end of the transducer is connected with an amplitude-change pole; an abrasive particle template is connected to the smaller end part of the amplitude-change pole; and after the power supply outputs energy, the transducer drives the amplitude-change pole to generate ultrasonic vibration. During brazing, the template on which abrasive particles are spread is pressed on the working face of a grinding wheel base body with brazing filler metal with preset force; and an ultrasonic power supply is started to drive the transducer to generate ultrasonic excitation, the amplitude of ultrasonic vibration is amplified through the amplitude-change pole, an abrasive on the template is driven to generate preset ultrasonic vibration, friction is generated between the abrasive particles and a brazing filler metal layer, the brazing filler metal is softened under the thermal coupling effect and subjected to a diffusion bonding reaction with the abrasive particles, and the abrasive particles are brazed on the grinding wheel accordingly, thereby forming an abrasive particle layer. According to the device and method, the super-hard abrasive is brazed on the grinding wheel base body at a low temperature, and the consistency of the exposure height of the abrasive particles on the working face of an obtained brazed grinding wheel is better.

Description

technical field [0001] The invention relates to a device and method for ultrasonically brazing superabrasive grinding wheels. The device is applied to the preparation of superabrasive grinding wheels, and has the characteristics of simple and convenient operation, low brazing temperature, small deformation of the grinding wheel during the brazing process, high-precision brazing to form the grinding wheel, and controllable abrasive exposure height. Background technique [0002] Brazed superabrasive (diamond or cubic boron nitride) grinding wheel has a high sharpness, a large exposure height of the abrasive, and a large space for chips. It can arrange abrasive grains according to a certain arrangement rule and conduct heat. Good performance and other advantages are more and more widely used in the field of grinding. At present, the production of brazed superabrasive grinding wheels mainly relies on vacuum high-temperature furnace brazing or high-frequency induction heating br...

AI Technical Summary

Problems solved by technology

[0005] However, the above-mentioned production process relies on high temperature to melt the solder into a liquid state, and the chemical metallurgical reaction between the solder and the abrasive particles occurs near the melting point of the solder, and the abrasive particles are brazed, so the brazing temperature is high, and the thermal deformation of the grinding wheel is large; In the brazing process, the solid phase abrasive grains lack restraint, and there is floating and rolling in the liquid phase solder, which makes the position of the abrasive grains change.

This makes the deformation of the final brazed grinding wheel larger, and the exposed height of the abrasive grains on the working surface is inconsistent. These problems make the brazed grinding wheel, especially the formed brazed grinding wheel, unable to meet the requirements of precision grinding.

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