Seamless Elbow Manufacturing Technique ! - Video

Seamless elbow
Pipe fittings at the bend of the pipe
A seamless bend is a pipe fitting for a pipe bend. In all the pipe fittings used in the pipeline system, the proportion is the largest, about 80%. Usually, different forming processes are selected for elbows with different material wall thickness. Manufacturers commonly used seamless elbow forming processes are hot push, stamping, extrusion and so on !

Forming method

1. Forging method

The end or part of the pipe is thrust with the type forging machine to reduce the outside diameter. The commonly used type forging machine has rotary type, connecting rod type and roller type !

2. Rolling method

Generally do not use mandrel, suitable for thick wall tube inside round edge. The core is placed in the tube and pushed by a roller on the outside for round edge processing !

3. Stamping method

Expand the tube end to the required size and shape with taper core on the punching press !

4. Bending forming method

There are three methods that are more commonly used, one method is called stretching method, the other method is called stamping method, the third roller method, there are 3-4 rollers, two fixed rollers, an adjusting roller, adjusting the fixed roller distance, the finished pipe fittings are bent.

5. Bulging method

One is to place rubber in the tube and compress it with a punch above to make the tube protrude into shape; Another method is hydraulic bulge forming, in the middle of the pipe filled with liquid, liquid pressure to the pipe into the desired shape, the production of bellows is mostly used in this method !