Method of processing metal members

Abstract

The first and second metal members (W1, W2) are connected by the following steps: overlapping at least two metal members with each other; pressing a rotary tool (1) on the outermost surface of the overlapping metal members, i.e., Pressed on the first metal member (W1); the frictional heat generated by the rotation of the rotating tool (1) stirs the metal structure between the first and second metal members (W1, W2), while maintaining the metal member in a non-melted state .

Description

technical field [0001] The present invention relates to methods of machining metal components such as aluminum alloy castings and plates. Background technique [0002] In the current joining technology, metal components such as plates or those that have been pressed into a three-dimensional shape are overlapped with each other and connected using resistance welding or arc welding, joining materials, bolt fastening, riveting, etc. [0003] If the metal member exhibits a complicated three-dimensional shape, a spot welding method is used in which a plurality of parts to be welded scattered on the metal member can be locally welded. [0004] As another joining technique, Japanese Patent No. 2712838 discloses a joining method in which metal members are stirred by friction while remaining in a non-melted state. This joining technique joins two metal parts in the following steps: At the point where the two metal parts butt together, a protruding part called a probe is inserted int...

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Problems solved by technology

[0005] However, in the connection technology described in the above-mentioned patent, since the probe is inserted into the surface of the metal member and moves, there will be welding traces (holes) at the start and end points of the probe movement track

This causes problems related to the appearance of the metal member, that

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