Method and device for assistant brazing of airborne type brazing flux

A flux and brazing technology, which is used in auxiliary devices, tin feeding devices, welding equipment, etc., can solve the problems of poor wetting and spreading of liquid solder, pores in the weld, uneven coating, etc., to promote wetting. Spreading, increasing strength, evenly distributed effects

Active Publication Date: 2015-06-03
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to overcome the disadvantages of uneven coating of the existing brazing flux on the surface of the solid base metal and complex process, under laser or arc welding conditions, the generation of pores in the weld seam due to the easy volatilization of the flux, and the poor wetting and spreading of the liquid brazing material, etc. A method and device for airborne flux-assisted brazing (melting brazing) are provided

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  • Method and device for assistant brazing of airborne type brazing flux

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specific Embodiment approach 1

[0021] Embodiment 1: The method and device for airborne flux-assisted brazing of the present invention are firstly a powder feeder system, and the flux is loaded into the powder hopper 2 of the powder feeder, and then the air flow is adjusted so that the flux can Spray from the powder nozzle 4 smoothly without being too scattered; install the workpiece 5 so that the welding heat source 1 is just aligned with the position to be welded; adjust the direction of the welding wire 7 - the direction of the welding heat source 1 - the direction of the powder nozzle 4 to intersect at the same point, and weld During the process, first turn on the welding heat source and the airborne flux system, and then start the wire feeding after it is stable.

[0022] In the above-mentioned brazing (melting brazing) process, by adjusting the welding heat source line energy, welding speed, wire feeding speed, air flow, and powder wheel speed, a reasonable range of welding process parameters is obtaine...

specific Embodiment approach 2

[0023] Specific implementation mode two: using figure 1 The device shown is used for air-borne flux-assisted TIG surfacing experiments on steel surfaces. The welding wire is φ1.0mm Al-12Si welding wire, the steel plate is 316 stainless steel, the welding current is 90A, the welding speed is 0.3m / min, and the wire feeding speed is 3.0m / min, powder wheel speed 40 rpm, gas flow 3L / min.

specific Embodiment approach 3

[0024] Specific implementation mode three: using figure 1 The device shown is used for airborne flux-assisted fiber laser surfacing experiments on steel surfaces. The welding wire is φ1.2mm Al-5Mg welding wire, the steel plate is 316 stainless steel plate, and the welding parameters are: laser power 1800W, welding speed 0.5m / min, wire feeding speed 3.5m / min, powder wheel speed 40 rpm, gas flow 3L / min.

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Abstract

The invention relates to a method and a device for assistant brazing of an airborne type brazing flux, which belong to the field of brazing (melt brazing) in material processing engineering. According to the method and the device, brazing flux powder and protective gas are uniformly sent to a welding pool by virtue of an airborne type powder feeder, and the brazing flux which enters the pool can uniformly cover the surface of a welding zone, so that oxides on the surface of solid base metal and in the pool can be effectively eliminated, the interfacial tension of liquid brazing filler metal and the surface of the solid metal can be reduced, and wet spreading of the liquid brazing filler metal on the surface of the solid metal is accelerated, so as to form good formation of a welding seam and increase the intensity of a joint; the pool can be effectively protected by the protective gas, so as to prevent the welding seam from being further oxidized. The method and the device have the advantages of convenience in operation and simple process.

Description

technical field [0001] The invention belongs to the field of brazing (melting brazing) in material processing engineering, and specifically relates to a method and device for airborne flux-assisted brazing (melting brazing). Background technique [0002] The high-quality and efficient connection of galvanized steel sheets and dissimilar metal materials with large melting point differences such as aluminum and steel, titanium and aluminum, copper and steel, etc. has always been a technical problem in the field of welding. The main reason is that during the welding process of galvanized steel sheet, the low-melting point zinc is easy to volatilize, which leads to the formation of pores in the weld and the reduction of the corrosion resistance of the joint; and the difference in physical properties of dissimilar metals leads to large deformation of the welded workpiece, and there is a large residual at the joint. Stress; the difference in chemical properties leads to the easy o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K3/06
CPCB23K1/0056B23K1/19B23K1/203B23K3/082B23K2101/18B23K2103/18
Inventor 陈树海李猛黄继华赵兴科霍旭晨
Owner UNIV OF SCI & TECH BEIJING
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