Introduction of five common methods for bending pipe processing

In daily life and work. You will encounter straight tubes that are bent into various shapes for use. The elbow is bent by a set of bending dies. No matter which kind of equipment is used, most of them use elbows, mainly for oil transportation, gas transmission, infusion, etc., which are more important in the aircraft and its engine. status. Under such an important use case, how much do we know about the processing method of the elbow? The following is a brief introduction to the five methods commonly used in elbow processing.

1. Stamping method: The pipe end is expanded to the required size and shape with a tapered core on the punching machine.

Second, bending forming method: There are three methods are more commonly used, one method is called stretching method, the other method is called pressing method, the third roller method, there are 3-4 rollers, two fixed rollers, one adjusting roller, adjusting With a fixed roll gap, the finished pipe is curved.

Third, the bulging method: one is to place rubber in the tube, the upper part is compressed with a punch to make the tube protruding and formed; the other method is hydraulic bulging, filling the middle of the tube with liquid, and the liquid pressure is used to drum the tube. The shape of the bellows is mostly used in the production of this method.

4. Forging method: The end or part of the pipe is punched out by a swaging machine to reduce the outer diameter of the pipe. The common forging machine has a rotary type, a link type and a roller type. 3. Roller method: The core is placed in the tube, and the outer circumference is pressed by the roller for the round edge processing.

Five, rolling method: generally do not use the mandrel, suitable for the inner edge of the thick-walled tube.