Let the processed seamless steel pipe products have a smaller tortuosity relied on the mechanical straightening machine to complete. So in order to eliminate the seamless steel pipe turns, all seamless steel pipe must undergo cold straightening.
Seamless steel pipe tortuous is caused by the improper adjustment, residual stress of rolling and inequality of the cooling section and length along the tube. Thus, you can not get straight pipe directly from the mill, only through straightening, the steel pipe tortuosity can meet the conditions of the rule.
The fundamental principle of straightening is to make the seamless steel pipe elastoplastic tortuous, changing from large tortuosity to small tortuosity, and therefore within the steel straightening machine will definitely suffer repeated setbacks. The repeat tortuous degree of the steel pipe is mainly determined by adjusting the straightening machines.
There are many factors affecting the straightening quality, such as the tortuosity of original tube, pipe dimensions and material type alignment models, adjusting parameters and so on.
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