Hemming and in-situ laser welding method and apparatus
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United States of America Patent
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Nov 4, 2003
Issued Date -
N/A
app pub date -
Mar 8, 2002
filing date -
Mar 12, 2001
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A hemming and in-situ laser welding method and apparatus for hemming peripheral flanges of an outer steel panel over peripheral edges of an inner steel panel and laser welding the resulting hemmed joints. A lower die supports an outer metal panel in a position to be hemmed over an edge of an inner panel. An upper die is mounted on a movable support for reciprocal motion and hems the outer panel by folding a flange of the outer panel over onto an edge region of the inner panel when the upper die moves from a raised position to a down position. A laser unit welds the flange of the outer panel to the edge region of the inner panel with the upper die in its down position holding the two panels together.
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