Diffusion welding connection method of dissimilar metal honeycomb panel structure realized by laser

A technology of dissimilar metals and connection methods, which is applied in laser welding equipment, metal processing, welding equipment, etc., can solve the problems of poor joint performance, complicated process, and low efficiency, and achieve stable welding process, improved production efficiency, and high efficiency. Effect

Active Publication Date: 2020-11-10
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a diffusion welding connection method using laser to realize the structure of dissimilar metal honeycomb panels, so as to solve the problems of low efficiency, complicated process and poor joint performance in the welding process under special circumstances.

Method used

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  • Diffusion welding connection method of dissimilar metal honeycomb panel structure realized by laser
  • Diffusion welding connection method of dissimilar metal honeycomb panel structure realized by laser
  • Diffusion welding connection method of dissimilar metal honeycomb panel structure realized by laser

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Honeycomb panel structure welding, T-joint.

[0039] see figure 1 As shown in Fig. 1, the aluminum alloy / titanium alloy dissimilar metal fillet joint model is established, and the temperature field of the welded joint is numerically calculated before welding to obtain the temperature distribution in the joint, and the laser irradiation position is determined as figure 1 As shown, the laser power is 4-6kw, and the welding speed is 140-220mm / min.

[0040] see figure 2 and image 3 As shown, the aluminum alloy / titanium alloy dissimilar metal T-joint is welded by the method of the present invention, the aluminum alloy plate 1 and the titanium alloy plate 2 are fixed on the fixture, the laser beam is welded along the welding track 3, and the laser beam is irradiated on the outer plate The titanium alloy plate 2 is heated to melt part of the metal 4, and the honeycomb support plate is heated by heat conduction to form a diffusion weld with the outer plate to obtain a diffus...

Embodiment 2

[0043] Welding and butt joints of large structural parts.

[0044] see Figure 4 As shown, a stainless steel / titanium alloy dissimilar metal butt joint model is established, the joint temperature field is numerically calculated, the temperature distribution in the joint is obtained, and the process parameters are determined: the laser power is 2-5kw, and the welding speed is 160-200mm / min.

[0045] see Figure 5 and Figure 6 As shown, adopt the method of the present invention to weld stainless steel / titanium alloy dissimilar metals, fix the titanium alloy plate 2 and the stainless steel plate 6 on the fixture, weld the laser beam along the welding track 3, and direct the laser spot to the titanium alloy plate side Offset, 0.6-4mm away from the surface to be welded, melt part of the metal 4 on the titanium alloy base material, increase the temperature of the contact surface through the heat conducted from the side of the titanium alloy plate, produce a diffusion reaction, fo...

Embodiment 3

[0048] Welding of large structural parts, 45° inclined butt joints.

[0049] see Figure 7 As shown, a stainless steel / titanium alloy dissimilar metal butt joint model is established, and the joint surface to be welded is processed into a 45° inclined plane to increase the contact area, thereby increasing the diffusion connection area. At the same time, the laser irradiation angle must be the same as that of the inclined plane, parallel to the inclined plane, numerically calculate the temperature field of the joint, obtain the temperature distribution in the joint, and determine the process parameters. The laser power is 3-6kw, and the welding speed is 160-220mm / min. .

[0050] see Figure 8 and Figure 9 As shown, adopt the method of the present invention to carry out the welding of stainless steel / titanium alloy dissimilar metals, fix the titanium alloy plate 2 and the stainless steel plate 6 on the fixture, weld the laser beam along the welding track 3, and direct the la...

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Abstract

The invention relates to a diffusion welding method for achieving a dissimilar metal honeycomb plate structure through laser, and belongs to the technical field of connection of dissimilar metal. By means of a numerical calculation method, the power and irradiation position of the laser are precisely controlled, and therefore connection of diffusion welding is achieved. The problem that an area tobe welded cannot be welded directly due to certain special welding structures or welding positions is solved. Before welding is carried out, the temperature field and stress field of a weld joint aresubjected to numerical calculation so that the irradiation positions of laser beams and the laser power can be precisely selected in the actual welding process. The laser is adopted as a heat source,the focal position of the laser is precisely controlled, diffusion connection of the special structures is achieved, and finally the well formed weld joint good in mechanical performance is obtained.

Description

technical field [0001] The present invention relates to the technical field of connection of dissimilar metals, in particular to a method of using laser to realize the diffusion welding connection of dissimilar metal honeycomb plate structure, and precisely controlling the laser through the method of numerical calculation to realize the diffusion welding connection of special welding structure or welding position. Background technique [0002] With the rapid development of the automobile, aerospace industry and other fields and the shortage of global resources and energy, the requirements for the lightweight and comprehensive performance of materials are getting higher and higher. In order to meet these requirements at the same time and ensure a certain strength, in During the connection process of the same or dissimilar metal materials, more complex structures often appear, making the welding process more complicated and difficult, especially in the process of laser welding,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K26/323B23K101/02
CPCB23K26/323
Inventor 谷晓燕陈纪宇张岩
Owner JILIN UNIV
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