At present, the commonly used processes of stainless steel cross include hydraulic bulging and hot pressing.
a.Hydraulic bulging
The hydraulic bulging of the cross is a forming process of expanding the branch pipe through the axial compensation of metal materials.
The process is to use a special hydraulic press to inject liquid into the pipe blank with the same diameter as the cross, and squeeze the pipe blank through the synchronous centering movement of the two horizontal side cylinders of the hydraulic press. The volume of the pipe blank becomes smaller after extrusion, and the liquid in the pipe blank increases with the volume of the pipe blank.
When the pressure required for the expansion of the cross branch pipe is reached, The metal material flows along the inner cavity of the die and expands out of the branch pipe under the dual action of the liquid pressure in the side cylinder and the tube blank.
b.Hot pressing
Cross hot pressing is to flatten the pipe blank larger than the cross diameter to the size of the cross diameter, and open a hole at the part of the stretched branch pipe; The tube blank is heated and put into the forming die, and the die for drawing the branch pipe is installed in the tube blank; Under the action of pressure, the tube blank is compressed radially. In the process of radial compression, the metal flows to the branch pipe and forms a branch pipe under the tension of the die.
The whole process is formed through the radial compression of pipe blank and the stretching process of branch pipe. Different from the hydraulic bulging cross, the metal of the hot pressing cross branch is compensated by the radial movement of the pipe blank, so it is also called radial compensation process.
Post time: Jul-06-2022