Apparatus for bending a rolling mill laying pipe

摘要

A method and apparatus for imparting a three-dimensionally curved configuration to a straight elongated element wherein one end of the element is removably supported with its axis coincident with a reference axis. The element is partially pre-bent away from the reference axis into conformity with a two-dimensional first guide path. Thereafter, the pre-bent element is bent into conformity with a three-dimensional helical second guide path.