Forming method of seamless elbow

　　Hebei Shengtian pipe fitting group is a professional manufacturer of seamless elbow, 180 degree elbow, national standard elbow and other pipe fittings. It is adjacent to Beijing and Tianjin, with superior geographical location and convenient transportation.

　　Stainless Steel Ss 304 306 Seamless Pipe Fitting Elbow

　　1. Forging method: use the swaging machine to stretch the end or part of the pipe to reduce the outer diameter. The common swaging machines are rotary, connecting rod and roller.

　　2. Rolling method: generally, mandrel is not used, which is suitable for the inner circular edge of thick wall pipe. The core is placed in the pipe, and the outer circumference is pushed by the roller for the round edge processing.

　　3. Stamping method: use the core with taper on the punch to expand the pipe end to the required size and shape.

　　4. Bending forming method: there are three common methods, one is stretching method, the other is stamping method, and the third is roller method. There are 3-4 rollers, two fixed rollers, one adjusting roller, adjusting fixed roller distance. The finished pipe fittings are bent.

　　5. Bulge method: one is to place rubber in the pipe and compress it with a punch to make the pipe protrude; the other is to bulge the pipe with hydraulic pressure. Fill liquid in the middle of the pipe and the liquid pressure will bulge the pipe into the required shape. This method is mostly used in the production of bellows