Apparatus for friction stir welding
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United States of America Patent
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Jul 11, 2017
Grant Date -
Sep 22, 2016
app pub date -
Mar 3, 2016
filing date -
Mar 18, 2015
priority date (Note) -
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Abstract
An apparatus for friction stir welding with a drive shaft, a probe, which has a first friction surface, and a shoulder element having a second friction surface. An annular cavity is formed between an inner surface of the shoulder element and the drive shaft and/or the probe. The shoulder element includes first and second through holes that are spaced apart in the longitudinal direction. An annular ring element is rotatable with respect to the shoulder element and is rotatably supported on the shoulder element by first and second support members between which an annular channel is formed. The annular channel is arranged such that the first through hole connects the annular channel with the annular cavity. The annular ring element radially outwardly delimits the annular channel and includes a through bore which extends to the annular channel.
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