Ultrasonic-assisted induction preheating laser soldering method and device for preparing abrasive particle grinding wheel

Abstract

The invention provides an ultrasonic-assisted induction preheating laser soldering method and device for preparing an abrasive particle grinding wheel. The method comprises the following steps that (1) the to-be-welded grinding wheel coated with an active binding agent and abrasive particles is fixed to a rotary shaft, and the distance between an induction coil and the surface of the to-be-welded grinding wheel is controlled to be within an effective heating distance; laser beam light spots of a laser heating system are adjusted to be focused on the peripheral surface of the to-be-welded grinding wheel and to be located behind the induction coil in the rotation direction of the rotary shaft; and a rolling wheel at the tail end of an ultrasonic amplitude variation rod fixed in an ultrasonic wave loading system is tightly pressed on the side face, of the grinding wheel, in the acting area of the laser beam light spots; and (2) the rotary shaft is made to drive the to-be-welded grinding wheel to rotate, coupling heating is conducted on the surface of the to-be-welded grinding wheel through the induction coil and the laser beam light spots; and chemical bonding and wetting climbing effects of the interface of the active binding agent and the abrasive particles are facilitated through the ultrasonic effect, the abrasive particles leaving a coupling heating area are subjected to high-frequency vibration, and thus thermal stress of the abrasive particles is released effectively.

Description

technical field [0001] The invention relates to a method and a device for preparing an abrasive grinding wheel, in particular to a method and a device for preparing an abrasive grinding wheel by induction preheating laser brazing. Background technique [0002] Abrasive tools play an irreplaceable role in the high-efficiency and precision grinding of hard and brittle difficult-to-machine materials such as natural rocks, engineering ceramics, and semiconductors due to their excellent grinding characteristics such as high efficiency, stability, and durability. Abrasive tools use a large number of abrasive grains under the control of the bond to achieve countless micro-cutting and complete the removal of workpiece material. How to effectively control abrasive grains has always been the prerequisite for the preparation of abrasive grain tools. When the abrasive grain tools made by sintering or electroplating process are used, the abrasive grains are only mechanically wrapped and...

AI Technical Summary

Problems solved by technology

The fundamental reason is that the existing laser heating and brazing abrasive grain technology uses the laser beam to rapidly heat the temperature of the area to be heated from room temperature to above the melting temperature of the active solder, and then rapidly cools to room temperature, and the temperature difference between the inside and outside of the laser heating area If it is too large (up to 900 degrees Celsius or more), rapid heating and rapid cooling will not only bring a strong thermal shock to the abrasive grains, but will also leave a huge welding residual stress on the abrasive grains. As a result, it is reasonable to cause the above defects in the application middle

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