Double-cylinder symmetrical rolling mechanism

Abstract

The invention relates to a double-cylinder symmetrical rolling mechanism, which comprises a cylindrical blank roller, a supporting roller and a symmetrical eccentric wheel, wherein the supporting roller is provided with a first gear; one end of the supporting roller is provided with a second gear; one end of the supporting roller is provided with a rotating bracket; a rotating bracket driving pinis arranged on the rotating bracket; a fixing pin is arranged on the symmetrical eccentric wheel; the lower end of the symmetrical eccentric wheel is provided with a symmetrical eccentric wheel rotating pin; and a driving oil cylinder connecting rod is arranged on the symmetrical eccentric wheel rotating pin, so that the conditions that a small arc cannot be rounded and the rounding effect is notideal in the past are changed, the rounding effect control error is within 0.25MM, the rounding speed and efficiency are high, and rapid rounding of one piece in half a minute is realized. The discarded blank loss caused by incapability of rounding in the past is eliminated.

Description

technical field [0001] The invention relates to the field of steel pipe manufacturing, in particular to a double-cylinder symmetrical rolling mechanism. Background technique [0002] At present, the material used is a steel pipe with an outer diameter of φ460MM and a wall thickness of 8MM, and the length of the material is 175MM. Round pipes are thin-walled steel pipes. There are errors in the out-of-roundness and straightness of long steel pipes, and there are errors in feeding the upper pipe cutting and other cumulative errors, resulting in elliptical and partially out-of-round shapes, which seriously affect the welding process of the product. The traditional three-axis rounding can reduce the large arc, but the local small arc cannot be enlarged, and the effect of the full circle is not good. It can only be corrected with a hammer or lever in the next process, which is labor-intensive and time-consuming. The effect is still the same. Unsatisfactory, there are still more ...

AI Technical Summary

Problems solved by technology

Round pipes belong to thin-walled steel pipes. There are errors in the long steel pipes being out of round or straight, and there are errors in the feeding of the upper pipe cutting and other cumulative errors, resulting in elliptical and partially out-of-round shapes, which seriously affect the welding process of the product.

The traditional three-axis rounding can reduce the large arc, but the local small arc cannot be enlarged, and the effect of the full circle is not good. It can only be corrected with a hammer or lever in the next process, which is labor-intensive and time-consuming. The effect is still the same. Unsatisfactory, there are still more than 10% of the blanks that cannot be rounded and scrapped

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