The commonly used method fitting processing

1. Forging method: use a swaging machine will be washed out, the pipe end or part of reduce diameter, commonly used type of forging machineRotary, connecting rod type, roller type.2. Stamping method: on the punch with a tapered core of tube end expanding to the required size and shape.3. The roller method: placed in the tube core, peripheral with roller press, used for circular edge processing.4. The rolling method: generally need not spindle, suitable for thick wall pipe inside circular edge.5. Forming method: there are three kinds of methods are commonly used, a method called stretching method, another method called stamping method, the third roller method, there are three or four roller, two fixed roller, an adjusting roller, adjust the fixed roller spacing, finished pipe is bent.6. Ballooning method: one is placed in the tube rubber, with punch, compression, tube bulge forming;Another method is the hydraulic bulge forming, in the central tube filled with liquid, the liquid pressure the pipe drum into the required shape, corrugated pipe production most with this method.