The hydraulic bulging method is a simple and efficient technique in the production of steel pipe tees. Here are the specific steps:
Injecting liquid: Inject liquid into a tube blank with equal diameters in a three-way valve, and use the two horizontal side cylinders of a hydraulic press to synchronously move and extrude the tube blank. After being squeezed, the volume of the tube blank decreases, and the liquid inside the tube blank increases in pressure as the volume of the tube blank decreases.
Expansion branch pipe: When the pressure required for the expansion of the stainless steel three-way branch pipe is reached, the metal material flows along the mold cavity under the dual action of the liquid pressure in the side cylinder and the pipe blank to expand the branch pipe.
One time forming: The hydraulic bulging process of equal diameter stainless steel tees can be formed in one time, with high production efficiency; The thickness of the main pipe and shoulder wall of the stainless steel tee has increased.
Other simple methods
In addition to hydraulic bulging, the following methods are also relatively simple:
Forging method: using a forging press to press and elongate the end or part of a pipe, reducing its outer diameter. The commonly used forging presses include rotary type, connecting rod type, and roller type.
Stamping method: Use the conical core of the punch to expand the diameter of the tube end to the desired size and style.
Roller method: used for circular edge processing, placing a core inside the tube and pushing the outer circumference with a roller.
These methods each have their own characteristics and are suitable for the production of three-way fittings of different specifications and materials. Choosing the appropriate production method can significantly improve production efficiency and product quality.
