The Stainless Steel Cross hydraulic bulging is a forming process

　　The Stainless Steel Cross hydraulic bulging is a forming process that expands the branch pipe by axial compensation of metal material. The process is to use a special hydraulic press, which will be connected with the four pass.

　　The liquid is injected into the pipe blank with equal diameter, and the tube billet is squeezed by the two horizontal cylinders of the hydraulic press, and the volume becomes smaller after the extrusion of the tube billet. The pressure of the liquid in the tube billet increases with the volume of the tube. When the pressure is needed to reach the four pipe, the metal material is under the pressure of the side cylinder and the tube blank. Under the action of double action, the branch pipe flows out along the cavity of the die. The A403 Wp304L Sch40 Seamless Bw Stainless Steel Cross hydraulic bulging process can be formed at one time, and the production efficiency is higher. The head and shoulder wall thickness of the four links increase. Because of the large tonnage of the hydraulic bulging process with seamless four links, the current domestic manufacture is mainly used for the standard wall thickness of less than DN400 four links. The suitable forming materials are low carbon steel, low alloy steel and stainless steel, which have relatively low cold hardening tendency, including some nonferrous metal materials, such as copper, aluminum, titanium and so on.