Description

The process is to use a special hydraulic machine to inject liquid into the tube blank with the same diameter of the stainless steel cross tee, and to simultaneously press the two horizontal side cylinders of the hydraulic machine presses down the tube billet, the volume of the tube billet becomes smaller, the tube billet is compressed.The volume of the liquid becomes smaller and smaller, and the blank of the tube becomes smaller and smaller, and when the pressure required for expansion reaches the stainless steel cross tee branch, the metal material flows along the cavity mold and the liquid pressure in the expanded branch pipe under the double action of the cylinder and the blank of the tube