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The processing method of pipe fittings

There are many kinds of processing methods for pipe fittings, many of which are in the category of mechanical processing, and the most used are punching method, forging method, rolling method, rolling method, bulging method, stretching method, bending method and combined processing method. Pipe fitting processing is an organic combination of machining and metal pressure processing.
Examples are as follows:
Forging method: the end of the pipe or part of the forging machine to red stretch, so that the outer diameter reduction, commonly used forging machine with rotary, connecting rod, roller type.
Stamping: Extend the pipe end to the desired size and shape on a punch with a tapered core. Roller method: Place the core in the tube, the outer circle with a roller to push, for the round edge processing.
Rolling method: generally do not have mandrel, suitable for thick-walled tube inside the circle.
Bending method: There are three methods are more commonly used, a method called stretching method, another method called the stamping method, the third is more familiar with the roller method, with 3-4 rollers, two fixed roller, an adjustment Roller, adjust the fixed roller from the finished pipe is curved. This method is widely used, if the production of spiral, the curvature can also increase.
Bubble method: one is placed in the tube rubber, the top with the punch compression, so that the tube protruding forming; Another method is the hydraulic bulging forming, filled in the middle of the tube liquid, the use of liquid pressure tube drum into the desired shape , As we commonly used in the production of bellows most of this method is used.
Source: China Pipe Fitting Manufacturer – Yaang Pipe Industry Co., Limited (www.yaang.com)

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