Induction BendingAt present, it is widely used in pipeline prefabrication in electric power, petroleum, chemical industry, navigation, nuclear industry and other engineering fields.
Medium frequency pipe bender adopts medium frequency induction heating to bend the workpiece under the condition of local heating.Compared with the general cold pipe bending machine, not only do not need a complete set of special mold, but also the volume of the machine tool only accounts for the same specification of cold pipe bending machine 1/3 ~ 1/2.The intermediate frequency hot bending technology is the most economical and effective one among all kinds of bending technology.
Intermediate frequency bend is stay in steel pipe bending part set in the process of induction coil, mechanically pivoted arm stuck pipe head, zhongtong into the intermediate frequency induction coil current heating tube, when the steel tube temperature to the plastic state, after the steel pipe end with mechanical thrust forward, bending, bending of making steel pipe section with coolant cooling rapidly, so that heating, while advancing, bending, while cooling, constantly to bend pipe bending.
This process can avoid the non-uniform phenomenon of pipe bending wall thickness caused by the tension and thinning of the convex edge and the compression and thickening of the concave edge in the traditional pipe bending process.This process can be used to produce a small radius (R approximately D) with uniform wall thickness and a thin wall (t/D approximately 0.015) 180 elbow, which cannot be achieved by other pipe bending processes.If the design of various process parameters is reasonable, the process can ensure that the pipe wall thickness at all parts of the bending process remains unchanged, that is, it is always equal to the wall thickness of the straight pipe billet before deformation.By using this technology can be in the same horn mandrel last push to produce the same caliber of 45 ° and 90 °, 180 ° bend bend Angle, high production efficiency.
