Bending of Closed Section Bars under Numerical Control

As a rule bending of the closed section bars (tubes) is connected with certain problems which lie in distortion of the section bar shape at the point of bending (out-of-roundness and corrugation) unless additional measures are taken. In the past the standard measure consisted in filling the section bar with sand and sealing of its both ends. Now the modern numeric control equipment allows to avoid such measure using the flexible mandrel to fight the out-of-roundness and the burnisher to prevent the corrugation. Our tube bender allows to make intricate parts from the closed section bars (tubes) in case the appropriate tooling is available.