Patent ID: 6216511
Filing Date: 2001-04-17
Classification: B21C

Abstract:
An apparatus for smoothing a thick walled portion of a steel pipe that has been made by pressure-welding two opposite longitudinal edges of an open pipe with a squeeze roll after subjecting two opposite longitudinal edges to induction heating, the apparatus comprising:outer and inner reduction rollers for applying pressure to opposing sides of the thick walled portion from respective outer and inner surfaces of the pipe;a support supporting said inner reduction roller to be rotatable and comprising a water passage for cooling water and a coupler at one end thereof;a connecting rod connecting said support to said coupler and containing a further water passage in fluid communication with said water passage;a support frame for supporting said outer reduction roller, and means for moving said support frame in the steel pipe radial direction to control the spacing between said outer and inner reduction rollers; andan anchor holding said connecting rod.