Seamless steel tube is the combination of machining and metal pressure processing, processing many ways, within the scope of machining and the like, are common stamping, forging method, roller processing method, rolling method, bulging method, stretching , bending method, and a combination of processing methods, to understand in detail below under:
1, Bulging method: one is placed in the seamless steel pipe rubber, with the top punch compression, so that the sub-convex shaped seamless steel pipe; Another method is forming a hydraulic bulging in the middle of seamless steel tubes filled with liquid child, by fluid pressure seamless steel sub-drum into the desired shape, like we used corrugated seamless steel pipe production is most used in this way.
2, Forging method: using a swaging machine seamless steel pipe end or part of the child to be rushed stretch, reducing the outer diameter, often have a rotary swaging machine, link type, roller.
3, Roller method: Place the core in a seamless steel pipe, the outer periphery with rollers pushing for round edge processing.
4, Rolling method: generally do mandrel, suitable for thick-walled seamless inner circle to the edge.
5, Bending method: There are three methods more commonly used, a method called stretching method, another method called stamping method, and the third is more familiar roller method, there are 3-4 roll, two fixed roll, an adjustment roller, adjust the fixing roller distance, finished seamless steel member is curved. Wider application of this approach, if the production of seamless steel pipe spiral curvature can be increased.
6, Stamping method: punch with seamless steel core with a tapered end will expand to the required size and shape.
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