Method and apparatus for bending a cold, for carrying out of the curved ducts has two tubes

摘要

P the invention relates to a process and apparatus for bending a cold aimed at carrying out of the curved ducts, comprising an outer tube which contains an inner tube, the bending is carried out in the same time as the bending of the outer tube. / p & & p & the process according to the invention is remarkable in that it is to ensure the bending of the outer tube 1 by means of a chuck 3 provided with a longitudinal groove 3a is moves along the inner tube 2 in order to guide and the bending of this latter. / p & & p & the invention relates to all the pipes has two tubes inserted in one another, coaxial or not, such as the sleeves of the distribution of fuel. / p