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Double-sided friction stir welding method of metal plate and double-sided friction stir welding device

A technology of friction stir and joining method, which is applied in the direction of metal processing equipment, welding equipment, manufacturing tools, etc., can solve problems such as temperature rise, and achieve the effect of promoting plastic flow and good joint state

Active Publication Date: 2021-11-30
JFE STEEL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when pressing the shoulders of a pair of rotary tools facing each other to the surface side and the back side of the joint portion of the metal plates, it is important to obtain a sufficient temperature rise and shear stress for realizing the joint state. The gap between the shoulders of a pair of rotary tools, the technology described in patent documents 3, 4, and 5 does not take any consideration

Method used

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  • Double-sided friction stir welding method of metal plate and double-sided friction stir welding device
  • Double-sided friction stir welding method of metal plate and double-sided friction stir welding device
  • Double-sided friction stir welding method of metal plate and double-sided friction stir welding device

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Embodiment

[0115] Friction stir welding was performed using steel plates with the thicknesses, chemical compositions, and tensile strengths shown in Table 1. In the case of mating joints, a so-called I-groove without an angle is used for the mating surface of the joint, and the rotary tool is pressed from both the front side and the back side of the mating part of the steel plate according to the surface state of the milling process. and join. In the case of overlapping joining, two steel plates of the same type are stacked, and the rotating tool is pressed from both the front side and the back side of the overlapping portion of the steel plates to join. The rotation direction of the rotary tool on the surface side and the back side is as follows: figure 2 As shown in (1), in a plan view viewed from the front side of the steel plate (metal plate 3), the front side rotary tool (rotary tool 1) is rotated clockwise, and the rear side rotary tool (rotary tool 8) is rotated clockwise. Rota...

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Abstract

The present invention provides a friction stir welding method and a preferable friction stir welding apparatus for performing the friction stir welding, which can uniformly obtain the required welding state in the thickness direction of a metal plate when double-sided friction stir welding is performed. In terms of sufficient plastic flow, the occurrence of defects at the time of joining can be suppressed, the joining speed can be increased, and sufficient strength can be achieved and joining workability can be improved. A pair of rotating tools opposed to each other are respectively arranged on the front side and the back side of the mating portion or the overlapping portion, which are the joint portions of the two metal plates, and the pair of rotating tools are rotated one by one at the mating portion or the overlapping portion. The edges are moved in the joining direction to soften the metal plates by the frictional heat between the rotary tool and the metal plates, and the softened portion is stirred by the rotary tool to generate plastic flow to join the metal plates to each other.

Description

technical field [0001] The present invention relates to arranging a pair of rotating tools opposed to each other to face the front side and the back side of a mating portion or an overlapping portion of a metal plate, and to rotate the pair of rotating tools at the mating portion or overlapping portion along a joining direction. A double-sided friction stir welding method for joining metal plates to each other by moving to soften the metal plate by using the frictional heat of the rotary tool and the metal plate, and stirring the softened part with the rotary tool to generate plastic flow and to carry out The double-sided friction stir welding device of the double-sided friction stir welding. [0002] In addition, the present invention aims to solve problems that may arise when the friction stir welding method is applied to metal plate joining or when a friction stir welding device is used The local plastic flow in the joint caused by the difference in temperature and plastic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K20/12
CPCB23K20/123B23K20/1265B23K20/1245B23K20/121B23K20/1205
Inventor 松下宗生池田伦正
Owner JFE STEEL CORP
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