Apparatus and method for laser welding in a hemmer apparatus
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United States of America Patent
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-
Feb 5, 2002
Issued Date -
N/A
app pub date -
Feb 8, 2000
filing date -
May 6, 1999
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A hemmer apparatus has at least one welding laser attached to the moveable crown for controlled welding of the hemmed panels to hold the panels with respect to one another, at least temporarily, and/or to maintain geometry between the panels until permanently fixed, such as when the adhesive cures or when additional welding is performed. Laser welding in the hemmer apparatus can be performed by providing relief in the steel used to form the hem, or by providing a tab in the hem material extending beyond the steel forming the hem, or a combination of the two, in order to allow access of the laser beam to the location where the geometry stabilizing tack weld is desired to be placed. Multiple welds are placed in spaced locations about the periphery of the hemmed panels as required for the specific application.
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