Device and Method for Forming Pipe Elements

摘要

A combination of roller tools is used to cold work a pipe element and impart a desired shape to the sidewall. The roller tools are movably mounted on a frame. Segments of the roller tools align with one another during operation. The roller tools are used in a method of roll forming wherein the sidewall of the pipe element is compressed between the rollers.

主权项

1. In combination, first and second rollers for imparting a shape to a sidewall of a pipe element, wherein said first roller comprises:
a first segment having a first outer diameter; a second segment positioned contiguous with said first segment and having a second outer diameter smaller than said first outer diameter; a third segment positioned contiguous with said second segment and having a third outer diameter larger than said second outer diameter; and wherein said second roller comprises: a fourth segment having a fourth outer diameter; a fifth segment positioned contiguous with said fourth segment and having a fifth outer diameter greater than said fourth outer diameter; a sixth segment positioned contiguous with said fifth segment and having an sixth outer diameter less than said fifth outer diameter; and a seventh segment positioned contiguous with said sixth segment and having a seventh outer diameter approximately equal to said fifth outer diameter.