There are mainly six methods for bending tube processing, and we will now provide a detailed introduction.

1. Blowing Method: One method involves placing rubber inside a tube and using a punch to compress it from above, forming the tube into a bulge; another method is hydraulic blowing, where a liquid is filled into the middle of the tube, and the liquid pressure inflates it into the desired shape. Most of the bellows production uses this method.

2. The stamping method: Use a conical mandrel on a press to expand the tube end to the required size and shape.

3. Roller Method: Place mandrels inside the tube and compress the outer circumference with rollers, used for circular edge processing.

4. Rolling Method: Generally without mandrel, suitable for the inner circular edge of thick-walled pipes.

5. Bending Techniques: Three common methods are employed, including the Stretching Method, the Stamping Method, and the Three-Roller Method, which consists of 3-4 rollers: two fixed rollers and one adjustable roller. The adjustable roller is used to adjust the distance between the fixed rollers for lighting accessories' bending tubes, resulting in finished bent pipe components.

6. Forging Method: Using a forging machine to stretch the end or a portion of the tube, reducing the outer diameter of the pipe fitting. Common types of forging machines include rotary, lever, and roller machines.