Method for manufacturing a side rail for a vehicle frame assembly
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United States of America Patent
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Feb 22, 2000
Grant Date -
N/A
app pub date -
May 13, 1998
filing date -
May 14, 1997
priority date (Note) -
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Abstract
A method for manufacturing a side rail in a vehicle frame assembly includes the initial step of roll forming flat stock to form a side rail having a C-shaped cross section defined by an upper flange corresponding to the top open side of the C-shape, a lower flange corresponding to the bottom or opposite open side of the C-shape, and a web corresponding to the back of the C shape and connecting the upper flange and the lower flange. The terminal edges of the upper flange and the lower flange define an edge plane that extends generally parallel to a vertical plane defined by the web. A portion of the lower flange is then stamped in a direction parallel to the vertical plane to form a kick-up in portion in the lower flange. The edge plane defined by the edges of the upper and lower flanges in the kick-up portion does not extend at the predetermined relationship relative to the plane defined by the web. Then, a portion of the lower flange in the kick-up portion is removed, such as by trimming with a cutting torch, such that the edge plane defined by the edges of the upper and lower flanges in the kick-up portion again extends at the predetermined relationship relative to the plane defined by the web.
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