Machine for bending thin walled tubes - has die and transporter with grooves varying from elliptical to circular

摘要

The machine for pipe bending is esp. for bending thin walled pipes with circular cross sections. The pipe is placed on a rotating die with a radius corresp. to the pipe bend radius. The pipe is pressed against the die by a transporter with semielliptical grooves. The pipe is bent and deformed so that a circular pipe cross section is generated at the bend. The pipe transporter has a replaceable transition piece. The groove cross section varies in the transition piece steplessly from semielliptical shape to semicircular shape corresp. to the circular pipe section. The transition occurs within a region displaced from the initial clamping point corresp. to the required bend length.