Weld leveling of straight seam steel pipe
Weld leveling of straight seam steel pipe (lsaw/erw): Due to the impact of the welding current and the influence of gravity, the internal weld of the pipe will protrude, and the external weld will also sag. If these problems are used in an ordinary low-pressure fluid environment, they will not be affected. If it is used in high temperature, high pressure and high speed fluid environment, it will cause problems in use. This defect must be eliminated using dedicated weld leveling equipment. The working principle of the welding seam leveling equipment is: a mandrel with a diameter of 0.20mm smaller than the inner diameter of the pipe is set in the welded pipe, and the mandrel is connected to the cylinder through a wire rope. Through the action of the air cylinder, the mandrel can be moved within the fixed area. Within the length of the mandrel, a set of upper and lower rolls are used to roll the weld in a reciprocating motion perpendicular to the position of the weld. Under the rolli...