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Joining method

A joining method and technology of butt joints, which are applied in the field of joining, can solve problems such as increased roughness of joint surfaces and enlarged grooves of metal components

Active Publication Date: 2019-12-13
NIPPON LIGHT METAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the plastic flow material is not pressed by the shoulder portion, there is a problem that the grooves on the surface of the metal member become large and the roughness of the joint surface becomes large.
In addition, there is a problem that a raised portion (a portion where the surface of the metal member is raised compared to before joining) is formed near the groove.

Method used

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Experimental program
Comparison scheme
Effect test

no. 1 approach

[0051] The bonding method according to the embodiment of the present invention will be described in detail using the drawings. Such as figure 1 As shown, in the joining method of this embodiment, the first metal member 1 as a double-layer panel and the second metal member 2 as a double-layer panel are joined by friction stirring. "Front side" in the following description means the side opposite to "back side".

[0052] Both the first metal member 1 and the second metal member 2 are formed of metal capable of friction stirring. The first metal member 1 and the second metal member 2 are appropriately selected from friction stirring metals such as aluminum, aluminum alloy, copper, copper alloy, titanium, titanium alloy, magnesium, and magnesium alloy, for example. In the bonding method of the present embodiment, a preparatory step, an overlapping butt joining step, and a friction stir step are performed.

[0053] The preparation step is a step of preparing the first metal memb...

no. 2 approach

[0081] Next, use Figure 9 A joining method according to a second embodiment of the present invention will be described. In the bonding method of the present embodiment, a preparatory step, an overlapping butt joining step, and a friction stir step are performed. In this embodiment, since the insertion depth of the rotary tool F1D in a friction stirring process differs from 1st Embodiment, it demonstrates centering on a different part.

[0082] Such as Figure 9 As shown, in the upper front side friction stir process, the rotating tool F1D rotating clockwise is inserted into the upper front side butting part J1b, and the rotating tool F1D is relatively moved along the upper front side butting part J1b. exist Figure 9 , the rotary tool F1D moves from the near side to the deep side. The insertion depth of the rotary tool F1D is set so that at least part of the proximal pin F3 contacts the front surface 11b of the upper substrate 11 of the first metal member 1 and the front ...

no. 3 approach

[0089] Next, use Figure 11 A joining method according to a third embodiment of the present invention will be described. In the bonding method of the present embodiment, a preparatory step, an overlapping butt joining step, and a friction stir step are performed. In the joining method of the present embodiment, the rotary tool is different from the first embodiment and the second embodiment, so the description will focus on the different parts.

[0090] Such as Figure 11 As shown, the difference between the rotary tool F1 of this embodiment and the rotary tool F1D used in the first and second embodiments is that no protruding protrusion F6 is formed on the flat surface F5 of the tip side pin F4.

[0091] Such as Figure 11 As shown, in the upper front side friction stir process, the rotating tool F1 rotating clockwise is inserted into the upper front side butting portion J1b, and the rotating tool F1 is relatively moved along the upper front side butting portion J1b. exis...

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Abstract

This joining method for joining a first metal member (1) and a second metal member (2) using a friction stirring rotary tool (F1D) provided with a base end-side pin (F3) and a tip end-side pin (F4) includes: an overlap butting step in which an overlapping portion (J1a), a front-side butted portion (J1b), and a rear-side butted portion (J1c) are formed; and a friction stirring step in which the rotating tip end-side pin (F4) is inserted from the front-side butted portion (J1b), a flat surface (F5) orthogonal to the rotational axis of the rotary tool (F1D) is brought into contact with the firstmetal member (1) and the second metal member (2), and a tip end surface (F7) of a protruded part (F6) which protrudes from the flat surface (F5) is inserted deeper than the overlapping portion (J1a),to join the front-side butted portion (J1b) and the overlapping portion (J1a).

Description

technical field [0001] The present invention relates to joining methods. Background technique [0002] As a rotary tool for friction stir welding, there is a rotary tool including a shoulder portion and a stirring pin hanging down from the shoulder portion, and a friction stir welding method for joining two-layer panels using the above rotary tool is known (Patent Literature 1). The rotary tool performs friction stir welding in a state where the lower end surface of the shoulder portion is pressed into the metal member. By pressing the shoulder portion into the metal member, it is possible to press the plastic flow material and suppress the generation of burrs. However, there is a problem that defects are easily generated when the height position of the joint is changed, and the groove becomes large and a large number of burrs are generated. [0003] On the other hand, there is known a friction stir welding method in which two metal members are joined using a rotating too...

Claims

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Application Information

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IPC IPC(8): B23K20/12
CPCB23K20/1255B23K20/122B23K20/1265B23K20/129B23K20/22B23K2101/045
Inventor 堀久司山中宏介
Owner NIPPON LIGHT METAL CO LTD