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Element joint and manufacturing method therefor

A component and component technology, applied in the field of component joints and its manufacturing, can solve problems such as damage, difficulty in expanding tubes of high-strength components, and difficulty in maintaining product shape

Active Publication Date: 2021-08-06
KOBE STEEL LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Specifically, when the low-strength component is expanded and riveted to the high-strength component, the low-strength component may bite into the high-strength component and be damaged.
In addition, when a high-strength member is expanded to be caulked and joined to a low-strength member, it is difficult to expand the high-strength member from the viewpoint of formability.
Furthermore, if a processing force to the extent of deforming a high-strength part is applied, the shape of a low-strength part will not be maintained, and it will be difficult to maintain the shape of the product
Therefore, there is room for improvement regarding joint accuracy in either case

Method used

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  • Element joint and manufacturing method therefor
  • Element joint and manufacturing method therefor
  • Element joint and manufacturing method therefor

Examples

Experimental program
Comparison scheme
Effect test

no. 1 Embodiment approach

[0060] refer to figure 1 In the element joint 10 of this embodiment, a long pipe (first member) 11 formed of the material with the lowest strength, a short pipe (second member) 12 formed of a material with an intermediate strength, and a plate material ( 3rd part) 13 engagement.

[0061] Strength is mechanical strength, for example, it may be tensile strength or yield stress. The tensile strength will be described later as an example. In addition, the intermediate strength means that the strength is greater than or equal to the strength of the long pipe (first member) 11 and less than or equal to the strength of the plate (third member) 13 . That is, the short pipe (second member) 12 may be made of the same material as the long pipe (first member) 11 or the plate (third member) 33 . These also apply to the following embodiments.

[0062] The long tube 11 is in the shape of a long circular tube thinner than the short tube 12 . That is, the entire length of the long pipe 11...

no. 2 Embodiment approach

[0079] Figure 3A~3F with the first embodiment Figure 2A~2F Correspondingly, the manufacturing method of the element joint 10 of this embodiment is shown. In this embodiment, descriptions may be omitted for substantially the same parts as those in the first embodiment.

[0080] In the element joint 20 of this embodiment, a pipe (first member) 21 formed of the material with the lowest strength, a base (second member) 22 formed of the material with intermediate strength, and a plate (the third member) formed of the material with the highest strength are formed. Components) 23 are engaged.

[0081] The tube 21 is in the shape of an elongated circular tube thinner than the tubular portion 22 a of the pedestal 22 . The tube 21 is made of aluminum alloy, for example. The tensile strength of the aluminum alloy is about 400 MPa or less.

[0082] The pedestal 22 has a large-diameter and short cylindrical tubular portion 22a capable of being inserted into the tube 21 , and a flang...

no. 3 Embodiment approach

[0096] Figure 4 with the first embodiment Figure 2F Correspondingly, the element joint 30 of this embodiment is shown. In this embodiment, descriptions may be omitted for substantially the same parts as those in the first embodiment.

[0097] In the element joint 30 of this embodiment, a plate material (first member) 31 formed of the material with the lowest strength, a short pipe (second member) 32 formed of a material with intermediate strength, and a long pipe ( 3rd part) 33 is engaged.

[0098] The plate material 31 has a hole portion 31 a of a size capable of inserting the short pipe 32 . The plate material 31 is made of aluminum alloy, for example. The tensile strength of the aluminum alloy is about 400 MPa or less.

[0099] The short tube 32 is a circular tube with a large diameter and a short size to the extent that the long tube 33 can be inserted. That is, the entirety of the short tube 32 is a tubular portion. The short tube 32 is made of aluminum alloy, fo...

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Abstract

An element joint 10 having, joined to each other, a long pipe 11, a short pipe 12 formed of a material having a strength greater than or equal to that of the long pipe 11, and a plate material 13 formed of a material having a strength greater than or equal to that of the short pipe 12. In the element joint 10 at least one member, that is, the long pipe 11 or the short pipe 12, has a tubular section, and one tubular section is expanded and is joined by swaging to the other member. The short pipe 12 and the plate material 13 are welded to each other.

Description

technical field [0001] The present invention relates to component connectors and methods of making the same. Background technique [0002] High-strength steel sheets called high-pressure steels are used to reduce the weight of automobiles and improve safety. High-pressure steel is effective for weight reduction and safety improvement, but it is relatively heavy compared with low specific gravity materials such as aluminum. In addition, when high-pressure steel is used, problems such as a decrease in formability, an increase in forming load, and a decrease in dimensional accuracy arise due to high strength. In order to solve these problems, in recent years, multi-materials have been utilized in which extruded products, cast products, or press-formed products using aluminum, which has a lower specific gravity than steel, are combined with steel parts. [0003] What becomes a problem in multi-materialization is the joining of dissimilar metals such as steel parts and aluminum...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21D39/04B21D39/06B21D39/20B60R19/24
CPCB60R19/24B21D39/206B21D39/044B23P15/00B21D39/06B21D39/028F16L13/007F16L13/02F16L13/147
Inventor 前田康裕桥村彻山川大贵
Owner KOBE STEEL LTD
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