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A method of laser brazing single-layer cubic boron nitride tool

A cubic boron nitride and boron nitride tool technology, applied in laser welding equipment, manufacturing tools, welding equipment and other directions, can solve the problem of affecting the bonding strength of the brazing layer and the cubic boron nitride, and it is difficult to realize the cubic boron nitride abrasive grains orderly arrangement, thermal damage of cubic boron nitride, etc., to achieve the effect of convenient and orderly arrangement, increase length, and reduce thermal damage

Active Publication Date: 2019-11-26
CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] However, when laser brazing cubic boron nitride tools, cubic boron nitride is generally preset in the solder, and the laser scans the mixed layer of solder and cubic boron nitride, which will cause thermal damage or even combustion of cubic boron nitride, which is serious Affects the bonding strength between the brazing layer and cubic boron nitride
Moreover, the cubic boron nitride is pre-set in the solder, and the laser scans the mixed layer of the solder and cubic boron nitride, which makes it difficult to achieve an orderly arrangement of the cubic boron nitride abrasive grains.

Method used

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  • A method of laser brazing single-layer cubic boron nitride tool
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  • A method of laser brazing single-layer cubic boron nitride tool

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Embodiment 1

[0056] figure 1 -3 is a schematic diagram of the first embodiment of the present invention. The equipment involved in this embodiment includes a laser brazing system and an injection system 4 .

[0057] The laser brazing system includes a laser generator (not shown) and a laser brazing working head 8 connected to each other.

[0058] Such as figure 1 As shown, the injection system 4 includes a hopper 401 , a feeder 402 , a negative pressure chamber 403 , a vacuum generator 404 , a delivery gas inlet 405 , a delivery pipe 406 , a spray gun 5 , and an atomization gas inlet 407 . Start the feeder during work, the cubic boron nitride abrasive grains 2 in the hopper 401 are input into the feeder 402, and the conveying gas enters the vacuum generator 404 through the conveying gas inlet 405, so that the negative pressure generated in the negative pressure chamber 403 will be sucked into the feeder 402. Cubic boron nitride abrasive grains 2, while the cubic boron nitride abrasive g...

Embodiment 2

[0079] The following will be combined with Figure 4-5 Another technical solution of the present invention will be described in detail.

[0080] The difference from the above-mentioned first embodiment is that in this embodiment, a rectangular spot 10 is used to scan the solder, three spray guns spraying cubic boron nitride abrasive grains 2 are arranged to form a spray gun group, and the laser brazing system cooperates with the numerical control device, The orderly arrangement of the cubic boron nitride abrasive grains 2 can be realized by controlling the injection timing, and a single-layer brazed cubic boron nitride tool with orderly arrangement of the cubic boron nitride abrasive grains can be produced.

[0081] The specific method is as follows: Figure 4 As shown, a rectangular spot 10 is used to scan the solder, and three spray guns spraying cubic boron nitride abrasive grains 2 are arranged to form a spray gun group, which includes No. 1 spray gun 501 , No. 2 spray gu...

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Abstract

The invention relates to a method for laser brazing of a single-layer cubic boron nitride (CBN) tool. The method comprises the following steps: providing a base body of a CBN tool; coating the surface of the base body of the CBN tool with a solder to manufacture a CBN tool blank; providing an injection system, wherein the injection system comprises a hopper and a spray gun connected with the hopper; providing CBN abrasive particles and placing the CBN abrasive particles in the hopper; providing a laser brazing system, wherein the laser brazing system comprises a laser generator and a laser brazing work head; aligning the laser brazing work head and the spray gun to the surface of the tool blank; and starting up the laser brazing system and the injection system, and simultaneously moving the laser brazing work head and the spray gun, so that a focused laser beam generated by the laser brazing work head is directly irradiated onto the surface of the prearranged solder in front to melt the solder, and the CBN abrasive particles are sprayed into a brazing weld pool behind laser spots by use of the spray gun. According to the method, paraxial spraying of the CBN abrasive particles is adopted to perform laser brazing, so that the CBN abrasive particles are prevented from burning loss and oxidation during brazing.

Description

technical field [0001] The invention relates to a processing method of a cubic boron nitride tool, in particular to a method for laser brazing a single-layer cubic boron nitride tool. Background technique [0002] Although the hardness of the cubic boron nitride abrasive is lower than that of cubic boron nitride, and its thermal stability is better than that of cubic boron nitride, it has good wear resistance and corrosion resistance. More importantly, cubic boron nitride abrasive grains have greater chemical inertness to iron group elements, and are especially suitable for grinding difficult-to-machine materials such as nickel-based superalloys and titanium alloys. [0003] The single-layer brazed cubic boron nitride grinding wheel is unanimously regarded as the best replacement product of the single-layer electroplated grinding wheel, and it is highly appraised by the authoritative experts in the industry as one of the most important products in the abrasive industry, espe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K1/005B23K1/20B23K26/144
CPCB23K1/0056B23K1/20B23K26/144
Inventor 张明军朱彬唐昆毛聪
Owner CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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