A method for ultrasonic-assisted laser brazing of diamond tools

Abstract

The invention relates to a method for brazing a diamond tool through lasers with the assistance of ultrasonic waves. The method includes the steps that firstly, a base body of a grinding wheel is manufactured through a machining method; secondly, the surface of the base body of the grinding wheel is coated with a brazing material; thirdly, diamond grinding particles are cleaned through dilute sulfuric acid, rinsed with deionized water and then dried; fourthly, the diamond grinding particles are subjected to laser surface texturing treatment through laser beams; fifthly, a diamond grinding wheel forming workblank is manufactured; sixthly, the surfaces of the diamond grinding particles are subjected to oil removal treatment and dust removal treatment; seventhly, the grinding wheel forming workblank is heated in a heating furnace, and the temperature is kept; and eighthly, the heated grinding wheel forming workblank is brazed through the lasers with the assistance of the ultrasonic waves, and a brazed single-layer diamond grinding wheel is manufactured. According to the method, release of stress between the diamond grinding particles and the brazing material is facilitated by the adoption of heating and heat preservation, meanwhile, the diamond grinding particles not too closely combined can fall off spontaneously after the high-temperature heat preservation process is conducted, and therefore potential defects generated after welding can be prevented.

Description

technical field [0001] The invention relates to a diamond tool processing method, in particular to an ultrasonic-assisted laser brazing diamond tool method. Background technique [0002] The wide application of diamond tools in industrial production has greatly improved the overall level and capabilities of the processing and manufacturing industry, but at the same time, some of their disadvantages that have not been taken seriously have begun to be gradually exposed, whether it is single-layer electroplating or multi-layer For sintered diamond tools, the abrasive is only mechanically embedded in the coating or matrix metal, and its interface lacks bonding force. In high-efficiency grinding operations with heavy loads, the abrasive grains or coating of the grinding wheel are easy to fall off; It is necessary to increase the thickness of the bond layer, which will lead to the reduction of the exposed height of the abrasive grains and the reduction of the chip space, the grind...

AI Technical Summary

Problems solved by technology

It solves the problem that the large-size grinding wheel cannot be directly brazed, but due to errors in the assembly process of the insert, the overall precision of the diamond grinding wheel is not high

In addition, the use of high-frequency induction brazing has low equipment cost and fast heating and cooling speeds, which can greatly shorten the brazing cycle and avoid some limitations of the brazing process in vacuum furnaces, but its heating speed and heating range are limited by the coil Influenced by shape, especially for large and special-shaped abrasive tools, the design and manufacture of the induction coil are also complicated

[0006] On July 29, 2015, the announcement number CN 102974910 B invention patent "Diamond grinding wheel induction brazing device and brazing method" discloses a diamond grinding wheel induction brazing device and brazing method, which solves the problem of brazing process in the current vacuum furnace. The brazing cycle is long, the thermal deformation of the grinding wheel base is large, and there are still problems in the design and manufacture of the induction coil for special-shaped abrasive tools.

However, at present, the laser used by domestic and foreign researchers in the diamond laser brazing process is mainly CO2 with a wavelength of 10.6 μm. 2 Laser, diamond has a certain absorption to the laser of this wavelength, when the laser energy is too high, there are different forms of burning loss oxidation and graphitization of diamond after brazing

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