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Composite connection process for sealing point bearing surface

A composite connection and load-bearing surface technology, applied in welding equipment, manufacturing tools, welding equipment, etc., can solve the problems of joint weakening and insufficient strength, and achieve the effects of small thermal damage, good connection quality and high joint strength

Active Publication Date: 2022-07-12
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the problem of insufficient strength of the existing glue penetration resistance spot welding-gluing composite process, and solve the joint weakening problem caused by the high temperature curing of the bonding process, the present invention further provides a composite connection process of point bearing surface sealing

Method used

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  • Composite connection process for sealing point bearing surface
  • Composite connection process for sealing point bearing surface
  • Composite connection process for sealing point bearing surface

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specific Embodiment approach 1

[0027] Embodiment 1: Combining Figure 1 to Figure 3 This embodiment is described. This embodiment is a composite connection process for point bearing surface sealing, which is characterized in that it includes the following steps:

[0028] Step 1: The surfaces of the first plate 1 and the second plate 3 are mechanically polished and cleaned, and the first plate 1, the brazing material layer 2 and the second plate 3 are clamped sequentially from top to bottom in an overlapping manner;

[0029] The first plate 1, the brazing material layer 2 and the second plate 3 are clamped in sequence in an overlapping manner, wherein the first plate 1 and the second plate 3 are of different metal materials, the first plate 1 is located above, and the second plate 3 is located at the top. Below, the solder layer 2 is located between the first plate 1 and the second plate 3;

[0030] Step 2. Install the friction stir spot welding stirring head 4 on the main shaft of the friction stir welding...

specific Embodiment approach 2

[0032] Specific implementation mode 2: Combining Figure 1 to Figure 3 Illustrating this embodiment, the thickness of the first plate 1 and the second plate 3 in this embodiment is 0.5-10 mm, and the materials of the first plate 1 and the second plate 3 include but are not limited to aluminum and aluminum alloys, magnesium and magnesium alloys , copper and copper alloys, steel and other materials.

[0033] The other components are the same as in the second embodiment in the connection relationship.

specific Embodiment approach 3

[0034] Specific implementation three: combination Figure 1 to Figure 3 Illustrating this embodiment, the material of the brazing material layer 2 in this embodiment is a metal material whose liquidus temperature is 60% lower than the melting point of the first plate material.

[0035] The material of the solder layer 2 is a metal material whose liquidus temperature is 60% lower than the melting point of the first plate (in Kelvin thermometer), and after melting, it should be polished and cleaned on the surfaces of the first plate 1 and the second plate 3. Good spreading wettability. For example, when the first plate 1 is made of aluminum alloy (melting point is about 933K) and the second plate 3 is made of steel, the liquidus temperature of the solder layer 2 should not be higher than about 560K, for example, the optional solder Sn-10Zn-3Al (melting point about 491K), Sn-3Zn-1Cu-1Ni (melting point about 503K).

[0036]The other components are the same as those in the first ...

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Abstract

The invention discloses a point bearing surface sealing composite connection process, relates to a welding method, and aims to overcome the problem of insufficient strength of an existing through glue resistance spot welding-cementing composite process and solve the problem of joint weakening caused by high-temperature curing of a cementing process. And then spot welding is conducted through the friction stir spot welding technology, melting and spreading of brazing filler metal are synchronously achieved through friction / deformation heat of the friction stir spot welding technology to form a spot bearing face sealing composite joint, and a welding area with the sealing characteristic can be obtained by controlling local parts between welding spots. According to the method, the technical bottleneck that metal is difficult to weld through traditional fusion welding or resistance spot welding is broken through, the joint sealing performance and strength are high, the method has the advantages of being simple, easy to implement, good in connection quality and the like, heat input is only needed in the welding process, and the method is an energy-saving and environment-friendly green manufacturing technology. The invention relates to the technical field of welding.

Description

technical field [0001] The invention relates to a welding method, in particular to a welding method for realizing point bearing and surface sealing by utilizing the synchronous composite process of friction stir spot welding and brazing, and belongs to the technical field of welding. Background technique [0002] With the rapid development of the new energy vehicle industry, the lightweight design of structural materials has received more and more attention. In order to reduce weight, save energy, reduce costs, and meet different working conditions, the welding of lightweight materials and materials has been paid more and more attention. Lightweight materials such as aluminum alloys and magnesium alloys, as well as material connections such as aluminum / steel and aluminum / magnesium, can reduce the weight of structural parts and meet the dual technical requirements of structural performance and lightweight design. However, the weldability of these lightweight materials is dev...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K31/02B23K37/00B23K20/12
CPCB23K31/02B23K37/00B23K20/1255
Inventor 谢聿铭黄永宪孟祥晨马潇天万龙
Owner HARBIN INST OF TECH
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