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Method for manufacturing heterometallic assembly and heterometallic assembly

A technology of dissimilar metals and manufacturing methods, applied in metal processing, manufacturing tools, metal processing equipment, etc., to achieve the effect of excellent appearance, simple method, and high joint strength

Inactive Publication Date: 2021-10-01
KOBE STEEL LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The joint structure described in Patent Document 1 is a Mohawk structure joint technology using self-piercing rivets, and requires a roof molding member to cover the gap, so it cannot be said to be an industrially simple method. There is still room for improvement

Method used

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  • Method for manufacturing heterometallic assembly and heterometallic assembly
  • Method for manufacturing heterometallic assembly and heterometallic assembly
  • Method for manufacturing heterometallic assembly and heterometallic assembly

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Experimental program
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no. 1 approach

[0037] First, a first embodiment of the present invention will be described. figure 1 It is a diagram showing a schematic structure of a dissimilar metal joint body applied to a vehicle body. Such as figure 1 As shown, a vehicle body 10 of an automobile includes: a roof panel 20 made of aluminum or aluminum alloy constituting the roof of the vehicle body 10 ; and steel roof rails 30 provided on both sides in the width direction of the vehicle body. A pair of roof rails 30 are provided on the left and right sides of the vehicle body 10 along the front-rear direction of the vehicle body 10 .

[0038] Then refer to figure 2 . The roof panel 20 includes: a main body portion 20 a serving as a roof portion of the vehicle body 10 ; and a curved portion 20 b bent from an end portion of the main body portion 20 a toward the vehicle body inner side. The bent portion 20b is formed so as to overlap along the inner flange portion 30b bent from the end portion of the main body portion ...

no. 2 approach

[0073] Next, a second embodiment of the present invention will be described. As a method of joining the steel material 30 and the film 41 , laser welding can be used in addition to the laser brazing described in the first embodiment. Figure 4 It is a schematic cross-sectional view showing a dissimilar metal joint 50 joined by laser welding using a welding material (welding wire).

[0074] Such as Figure 4 As shown, also in this embodiment, the film 41 is formed by spraying metal powder at low temperature and high speed on at least a part of the surface 20 c of the aluminum or aluminum alloy material 20 by cold spraying (Step 1 ). Next, by laminating the aluminum or aluminum alloy material 20 and the steel material 30 in such a way that the film 41 and the steel material 30 face each other, and performing laser welding, the film 41 and the steel material 30 are melted to join the aluminum or aluminum alloy material 20 and the steel material 30, The dissimilar metal bonded b...

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Abstract

Provided is a heterometallic assembly and a method for manufacturing a heterometallic assembly. In the method, metal members of different species, namely an aluminum or aluminum alloy member and a steel member, are joined in an industrially simple manner, and the method makes it possible to achieve a high joint strength and to produce a heterometallic assembly that has an excellent appearance. This method includes: a step in which a metal powder that can bond with a steel member (30) is sprayed at a low temperature and at a high speed onto at least a portion of a surface (20c) of an aluminum or aluminum alloy member (20) to form a coating film (41); a step in which the aluminum or aluminum alloy member (20) and the steel member (30) are positioned such that the coating film (41) and the steel member (30) face each other; and a step in which brazing using a brazing material (42) or welding using a weld material (40) are carried out between the coating film (41) and the steel member (30).

Description

technical field [0001] The present invention relates to a method for producing a dissimilar metal joint and a dissimilar metal joint, and more specifically, to a method for producing a dissimilar metal joint and a dissimilar metal joint mainly used for structural members such as roofs, doors, and fenders of automobiles. metal joints. Background technique [0002] In the joining of the roof panel of the automobile body and the roof member of the roof rail, there is a Mohawk structure with a wide gap (gap) that can be applied to the existing mechanical joining method from the structure, and a narrow gap and good appearance. Excellent non-Mohawk structure for both. The Mohawk structure is generally a point joint method, and has a joint with a concave cross section. From the standpoint of aesthetics, the joint is usually covered with a roof molding member to cover the traces of spot welding. [0003] On the other hand, in the non-Mohawk structure, because the gap is narrow, t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K1/19B23K1/005B23K1/20B23K9/23B23K9/235B23K26/21B23K26/323B62D25/06
CPCB23K1/19B23K1/20B23K9/23B23K9/235B23K26/21B62D25/06B62D27/02B23K26/60B23K2103/20B23K2101/006B23K2101/18B23K35/302B23K35/3053B23K35/3033C23C24/106B23K35/002B23K35/004B23K35/226B23K1/0056B23K1/0008B23K2103/10B23K2103/04B62D29/008B62D65/06
Inventor 铃木励一前田恭兵
Owner KOBE STEEL LTD