At present, there are two kinds of commonly used curved pipe processing technology.
1、 Using tools to process curved pipe directly
Stainless steel curved pipe and cold curved pipe generally use this method.
2、 After processing with heating equipment, the bending is carried out
Hot simmer curved pipe, medium frequency curved pipe and alloy curved pipe all use this process.
Six processing methods of curved pipe
Stamping method: expand the tube end to the required size and shape with a taper core on the punch.
Roller method: the core is placed in the tube, and the periphery is pushed by roller for round edge processing.
3. Bulging method: one is to place rubber in the pipe and compress it with a punch to make the pipe protrude; The other method is hydraulic bulging forming, in which the middle part of the pipe is filled with liquid, and the liquid pressure bulges the pipe into the required shape. This method is mostly used in the production of bellows.
4 rolling method: generally does not use mandrel, suitable for thick wall tube inner round edge.
Forging method: the end or part of the pipe is punched and extended by the forging machine to reduce the outer diameter of the pipe. The commonly used forging machines are rotary type, connecting rod type and roller type.
Bending forming method: there are three commonly used 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, and one adjusting fixed roller pitch. The finished pipe fittings are bent.