Division by process

1. Hydraulic expansion

The hydraulic expansion of tee is a forming process in which the branch pipe is expanded by axial compensation of metal material. The process is to use a special hydraulic press, and the diameter of the three tube billet into the liquid, through the hydraulic press two horizontal side cylinder synchronous movement extrusion tube billet, tube billet after the extrusion volume becomes smaller, the liquid in the tube billet with the volume of the tube billet decreases and the pressure rises, when the three tube branch pipe expansion required pressure, Under the double action of the liquid pressure in the side cylinder and the tube blank, the metal material flows along the inner cavity of the die and expands the branch pipe.

The hydraulic bulging technology of tee can be formed at one time, and the production efficiency is high. The wall thickness of the head and shoulder of the tee has increased.

Due to the large tonnage required by the hydraulic bulging process of seamless tee, it is mainly used in the manufacture of tee with standard wall thickness less than DN400 in China. The forming materials are low carbon steel, low alloy steel, stainless steel, including some non-ferrous metal materials, such as copper, aluminum, titanium and so on.

2. Hot pressing

Three-way hot pressing is to flatten the tube blank larger than the three-way diameter to the size of the three-way diameter.
Make a hole in the part where the branch is stretched. The tube blank is heated, put into the forming die, and the tube blank is loaded into the drawing pipe die; Under the action of pressure, the tube blank is compressed radially. In the process of radial compression, the metal flows in the direction of the branch pipe and forms the branch pipe under the tension of the die. The whole process is formed by radial compression of the tube blank and tensile process of the branch tube. Different from the hydraulic expansion tee, the metal of the hot-pressing tee branch pipe is compensated by the radial motion of the tube blank, so it is also called radial compensation process.

Due to the use of heating after pressing tee, the material forming required equipment tonnage is reduced. The hot press tee has wide adaptability to materials, and is suitable for low carbon steel, alloy steel, stainless steel materials; Especially for tees with large diameter and thick pipe wall, this type of shaper is usually used