Stainless steel seamless elbows are pipe fittings used at pipe bends, which account for the largest proportion (80%) of all pipe fittings used in piping systems, so do you know what are the forming methods of stainless steel seamless elbows? ?
Generally, stainless steel seamless elbows have different materials or wall thicknesses, so the forming process is also different. Next, let’s talk about the most common methods.
1. Forging
The forging method refers to the use of a swage machine to stretch the end or part of the pipe to reduce the outer diameter. Commonly used swage forging machines are rotary, connecting rod, and roller.
Two, rolling
The rolling method usually does not use a mandrel, and is suitable for the inner round edge of a thick-walled tube. A core is placed in the tube, and the outer circumference is pushed by a roller for round edge processing.
3. Stamping
The stamping method is to use a tapered core on the punch press to expand the pipe end to the required size and shape.
Four, swelling
The bulging method is divided into two methods, one is to place rubber in the tube, and compress it with a punch above to make the tube protrude; the other is hydraulic bulging, filling the middle of the tube with liquid, and the pressure of the liquid will bulge the tube into shape. The required shape is mostly produced by this method.
5. Bending forming
There are three commonly used bending forming methods, one is the stretching method, the other is the stamping method, and the other is the roller method. There are 3-4 rollers, 2 fixed rollers, and 1 adjustment roller, which are used to adjust the distance between the fixed rollers. The finished pipe is bent.