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Causes of ovals caused by seamless steel tubes

浏览: Release time: 2019-11-04 10:14 Times

The seamless steel tube is oval, that is, the cross section of the finished product is oval. During the drawing process, a tube drawing die with an oval hole is used or the two ends of the seamless steel pipe are bent too much during straightening, and they move up and down during the straightening process. This kind of defects can be caused by jams, excessive swing of the tail of the steel pipe, and uneven distribution of the reduction amount between the pair of straightening rollers. If there is a defect due to the ellipse of the die hole, the extubation die should be replaced. If the seamless steel pipe ellipse is formed during the straightening process, the related causes of the ellipse during straightening should be eliminated.