Intermediate frequency tube expanding machine is also known as hot tube expanding machine, as the name suggests, that is, the small diameter steel tube tube billet thermal expansion into a large diameter steel tube, the hydraulic tube expanding machine in the tube expanding first put the tube at the end of the groove flat, and then placed the tube in the corresponding diameter of the fixture hole.

The working process of intermediate frequency tube expanding machine: when the mold is opened, the plastic part will wrap the mould core under the action of shrinkage force, and the moving mould will move downward. After a certain distance, the pulling plate fixed on the fixed template will pull the stripping plate to make the plastic part come out from the mould core and realize the automatic demolding of the product. When closing the mould, under the joint action of guide groove, guide block, guide sleeve and guide column, the accuracy of closing the mould and the evenness of the wall thickness of the product are ensured, so that the products are qualified. Using medium frequency induction heating technology while increasing the difficulty of mold manufacturing and complexity, but under the condition of mass production, reduce the generation of waste, shorten the molding cycle, improve the quality of the pipes, at the same time reducing the pipe equipment and fittings machinery frequent maintenance and repair, has the function of automatic constant temperature, prevent the too high temperature, wall of fracture or damage)