PIPE GAUGING AND ROUNDING APPARATUS AND METHOD

摘要

Apparatus and method for gauging and rounding, at room temperature, a section of fully formed seamless ductile iron pipe (P) that has an out-of-round initial cross-section profile and/or a larger than desired initial gauge. The apparatus includes a set of hour-glass shaped gauging/rounding rolls (102) arranged so that the combined profiles of adjacent rolls forms a substantially continuous circular of precise diameter. In operation, the ductile iron pipe (P) is passed through the opening in the set of gauging/rounding rolls (102), thereby causing the pipe to be gauged and rounded. The pipe (P) is conveyed through one or two sets of rolls to accommodate multiple pipe diameters by a transport mechanism consisting of a rail (204) mounted push car (202) which is moved by one or more fluid actuated cylinders (206) anchored to a base in common with the rail.