Working Principle of A179 Hot Expanding Tube
The working principle of push-type steel pipe hot expanding technology (commonly known as steel pipe hot expanding). A179 steel pipe hot expanding conical inner mold mandrel (commonly known as mandrel) and medium frequency heating device (commonly known as heating coil), so that the set of A179 raw material tube on the mandrel in the hydraulic push system machine pushes forward, in the movement is heated, with the mandrel caliber increases, so that the A179 steel pipe expanding and forming process. First of all, to determine the appropriate expansion ratio to select the diameter of the parent material steel pipe, through precise control of the temperature of the medium frequency, the speed of the hydraulic push system, the slope of the mandrel, the length of the billet to control the deformation process, so that the metal compressed at the inner arc, flow, compensation for thinning due to the expansion of other parts of the pipe, so as to obtain a uniform wall thickness of the hot-expanded steel pipe. The principle of the process is simple, the expansion process only occurs between the mandrel, raw material tube, and related fixed connectors, simple structure, low accident rate (almost no), supporting the core head can be quickly disassembled, can realize multi-specification, small batch, short production period.