Joining method
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United States of America Patent
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Nov 7, 2023
Grant Date -
May 25, 2023
app pub date -
Jan 24, 2023
filing date -
May 11, 2017
priority date (Note) -
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status (Latency Note)
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Abstract
Provided is a joining method that can prevent a plastic flowing material from flowing out from a butt section and that can reduce the thickness and weight of metal members. The joining method is for joining a first metal member and a second metal member by using a rotary tool comprising a stirring pin, and is characterized in that: the stirring pin comprises a flat surface perpendicular to the rotation axis of the rotary tool and comprises a protruding section protruding from the flat face; and in a friction stirring step, the flat surface is brought into contact with the first metal member and the second metal member, and a front end face of the protruding section is inserted deeper than an upper overlapping section to join an upper front butt section and the upper overlapping section.
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