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friction stir joint

A friction stirring and joining body technology, applied in one field, can solve problems such as reduction in strength of joint W, undocumented problems, alignment of butt joints, etc., and achieve the effects of suppressing reduction in plate thickness, inhibiting joint defects, and preventing reduction in strength

Inactive Publication Date: 2016-05-11
SUZUKI MOTOR CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] However, in the case where at least half of the cross-sectional area of ​​the shoulder 52 of the rotary tool 51 on the horizontal plane is kept in contact with the member to be engaged, as Figure 10 As shown, when the joined members 55 and 56 having a curved portion R are to be friction stir-welded to each other in the tool traveling direction F, the curved portion R has a curved surface shape with a small radius, which causes the shoulder of the rotating tool 51 The rear portion of 52 interferes excessively with the engaged members 55, 56
Therefore, especially when the radius of the curved surface shape is small, or when the plate thickness of the joined members 55 and 56 is thin, the joints between the joined members 55 and 56 in the curved portion R of the curved surface shape The plate thickness t of the joint part W is greatly reduced, which may result in a decrease in the strength of the joint part W between the joined members 55 and 56 having the bent part R.
[0011] On the other hand, the shape of the rotary tool described in Patent Document 1 is very complicated, and the material of the rotary tool is a very hard material such as SK material, SKD material, or PCBN (polycrystalline cubic boronnitride), so processing is very difficult and requires considerable cost. Problems such as many processing costs and the number of production days
In addition, in Patent Document 2, the subject of the present invention described above is not described.
Assuming that, in the case of friction stirring joining members to be joined having a curved surface shape to each other in the traveling direction of the tool using the disclosed structure, since it is necessary to butt the inclined surfaces to each other, compared with the case of butting the vertical surfaces to each other, There are problems such as difficulty in aligning mating parts and low positioning accuracy
In addition, in Patent Document 3, similarly to Patent Document 2, the subject of the present invention described above is not described.
It is assumed that, when friction stir joining members having curved surfaces are joined to each other in the traveling direction of the tool using the disclosed structure, since the tool is inserted from a direction substantially perpendicular to the members to be joined, especially the radius of the curved surface shape When it is small, or when the plate thickness of the member to be joined is thin, there is a problem that the plate thickness of the joint portion after joining the member to be joined in the curved portion of the curved surface is relatively large. decrease, and it is unavoidable to reduce the strength of the joint

Method used

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Experimental program
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Effect test

no. 1 Embodiment approach

[0043] Hereinafter, a friction stir welded body according to a first embodiment of the present invention will be described with reference to the drawings.

[0044] figure 1 It is a figure which shows the friction stir welded body of 1st Embodiment of this invention, figure 1 (a) is a perspective view of a state in which two members to be joined are butted and a rotary tool is inserted into the planned joining portion, figure 1 (b) is a cross-sectional view in a state where two members to be joined are brought into contact with each other, and a rotary tool is inserted into the part to be joined.

[0045] Such as figure 1 As shown, the friction stir welded body 1 of the first embodiment is a structure in which two-dimensional planar parts are In the traveling direction F of the rotating tool 4 to be joined, friction stir welding is performed on a portion having a curved surface shape other than the flat portion from the flat portion to join. That is, the friction stir w...

no. 2 Embodiment approach

[0059] Figure 6 It is a figure which shows the friction stir welded body of 2nd Embodiment of this invention, Figure 6 (a) is a perspective view of a state in which two members to be joined are butted and a rotary tool is inserted into the planned joining portion, Figure 6 (b) is a cross-sectional view of a state where two members to be joined are brought into contact with each other, and a rotary tool is inserted into a part to be joined. In addition, the same code|symbol is attached|subjected to the same part as the structure demonstrated in the said 1st Embodiment, and description is abbreviate|omitted.

[0060] Such as Figure 6 As shown, in the friction stir welded body 21 of the second embodiment, the protrusion 5 of the joined member 3 on the side into which the rotary tool 4 is inserted is formed as a protrusion having a substantially triangular cross-section. The angle θ between the hypotenuse and the base in 5 is set within the range of 40°≤θ<75°. On the other...

Embodiment

[0063] The friction stir welded body 21 according to the second embodiment of the present invention was obtained by joining the to-be-joined members 2 and 3 under the friction stir welding (FSW) conditions shown in Table 1 below.

[0064] Here, the plate thicknesses of the joined members 2 and 3 are both 3 mm. In addition, as the rotary tool 4, the diameter D1 of the shoulder part 6 is 12 mm, the diameter D2 of the probe part 7 is 3.6 mm, and the length L1 is 4.5 mm.

[0065] [Table 1]

[0066] Table 1. Various conditions during the implementation of the second embodiment of the present invention

[0067]

[0068] In addition, a friction stir welding test was performed by changing the angle θ of the slope portion 5 a of the protrusion 5 , and a tension test was performed on the joint portion W of the friction stir welded body 21 . The results are shown in Table 2 described below.

[0069] Here, Autograph AG-Xplus 100kN (manufacturer: Shimadzu Corporation) was used for ...

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Abstract

The present invention provides a friction stirring jointing body. When jointed members having curved surface shapes are jointed in a friction stirring way through the friction stirring jointing body in an advancing direction of a tool, even the radius of the curved surface shape is small or the jointed member has a low thickness, interference does not occur between the rear portion of the shoulder of the tool and the jointed member, thereby preventing reduction of the thickness of the jointing part of the jointed member, and preventing reduction of strength of the jointing part. The friction stirring jointing body (1) enables two jointed members (2, 3) having curved surface shapes to abut joint with each other in the advancing direction (F) of a rotating tool, inserts the rotating tool into a jointing predetermining part of the jointed member, and performs friction stirring on the jointed members for enabling the jointed members to be jointed together, wherein, the end part of the jointed member (3) into which the rotating tool is inserted is provided with a protruding part (5) having a bevel part, and the rotating tool is approximately vertically inserted into the bevel part for performing friction stirring jointing.

Description

technical field [0001] The present invention relates to a friction stir welded body. Specifically, it relates to a friction stir welded body in which two joined members made of metal materials are butted against each other, or two or more joined members are overlapped with each other. On the other hand, when friction stir welding is performed, in the direction of travel of the rotating tool that joins two-dimensional planar parts, friction stir welding is performed from the planar part with a part having a curved surface shape other than the planar part, thereby joining friction stir welding. Stir the joint. Background technique [0002] As a conventional method of joining two members to be joined composed of metal materials, there is a Figure 9 The illustrated cylindrical rotary tool 51 is a method of performing friction stir welding (FSW). The rotary tool 51 includes a large-diameter shoulder 52 and a small-diameter probe portion 53. The probe portion 53 is protruding an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K20/12
CPCB23K33/00B23K20/122B23K20/1265
Inventor 田中风见西原达夫畑山智信
Owner SUZUKI MOTOR CORP