Method of manufacturing expansion joint
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United States of America Patent
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Mar 15, 2011
Issued Date -
N/A
app pub date -
Oct 22, 2007
filing date -
Oct 26, 2006
priority date (Note) -
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Abstract
A method of manufacturing an expansion joint includes steps of: marking parts, which will form the expansion joint, on a piece of raw material, so that the original 360 degree shape of the expansion joint is equally divided by the parts, and cutting the marked parts from the raw material; welding the divided parts, so that opposing ends of the welded parts are separated from each other; bending the welded parts into the form of a cone using a bending roller, thereby welding and joining the opposing ends thereof; fixedly mounting the resultant structures on a press; shaping the mounted resultant structures into products using a mold having a desired shape and dimension; and butting a pair of the products against each other and welding the products in the outer radial direction.
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