Pipe expansion online straightening device

Abstract

The invention relates to the technical field of production of steel tubes, and discloses an on-line straightener for steel tube expanding. The on-line straightener comprises a base, a portal frame, clamping beams, lifting jacks and a servo motor, wherein the base is mounted on the expanding line of an expanding machine; a steel tube passage is arranged on the base in the length direction of a steel tube; the portal frame is mounted on the base; the steel tube passage is positioned in the middle inside the portal frame; the clamping beams which form certain included angles with the horizontal plane are respectively and symmetrically arranged on both sides of the inside of the portal frame; and the lifting jacks are connected to the clamping beams respectively and are controlled through the servo motor. The on-line straightener realizes the simultaneous performance of the steel tube expansion and strengthening, reduces the conventional complex strengthening procedure, prevents the steel tube from being crushed, flawing or deforming during the strengthening process, improves the quality of tubes, and achieves the effects of energy conservation and efficiency improvement.

Description

technical field [0001] The invention relates to the technical field of steel pipe production, in particular to an on-line diameter expanding straightening device for steel pipes. Background technique [0002] When the straight seam steel pipe expanding machine equipment is producing small-diameter thin-walled steel pipes (among them: the diameter is 16″~30″ (406.4mm~762mm), and the wall thickness is (6mm-12mm)), the pipe is easy to bend after diameter expansion, which affects The straightness of the steel pipe needs to be straightened by a straightening machine. At present, the commonly used method is to straighten the steel pipe through a steel pipe straightening machine after the diameter expansion is completed. Hardening will occur during transportation, which will reduce the toughness of the pipe. Straightening after diameter expansion will easily cause cracks in the steel pipe and will easily cause changes in the size of the formed steel pipe. Contents of the inventi...

AI Technical Summary

Problems solved by technology

At present, the commonly used method is to straighten the steel pipe through a steel pipe straightening machine after the diameter expansion is completed. Hardening will occur during transportation, which will reduce the toughness of the pipe. Straightening after expansion will easily cause cracks in the steel pipe and will easily cause changes in the size of the formed steel pipe.

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