Method and device for joining at least two adjoining work pieces by friction welding
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United States of America Patent
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Apr 20, 2004
Grant Date -
Dec 5, 2002
app pub date -
May 16, 2002
filing date -
Nov 18, 1999
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
In a method and apparatus for joining at least two adjoining workpieces by friction welding, a rotatable shaft is provided at its front end with a friction welding tool which is biased toward the workpieces to plasticize an area of the workpiece into which the tool enters while the plasticized material is displaced and stored in, or around, the tool. Upon passing through the top workpiece and entering the lowermost work piece, the tool is removed and the stored plasticized material is returned to the void provided by the tool upon removal thereof from the workpieces for joining the workpieces.
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