Straightening device for eliminating bending defects of high frequency longitudinal seam welded pipe

Abstract

The invention discloses a straightening device for eliminating bending defects of a high frequency longitudinal seam welded pipe, which comprises a press-down device with an inverted V-shaped block, a lower V-shaped seat, a supporting trolley and a lower supporting plate. The press-down device comprises an upper supporting plate, a hydraulic cylinder arranged on a rack and the inverted V-shaped block; the upper supporting plate is provided with a through hole; a screw thread shaft head at the lower part of the hydraulic cylinder passes through the through hole on the upper supporting plate to be matched with a built-in screw thread at the bottom of the inverted V-shaped block; the lower supporting plate is fixed on a stage; a lower V-shaped seat is arranged at the middle part of the lower supporting plate; the supporting trolley is arranged at the end part of the lower supporting plate; the V-shaped block above the lower supporting plate moves down under the drive of a piston rod in the hydraulic cylinder so as to act on the welded pipe placed on the lower V-shaped seat and the supporting trolley. According to the straightening device, not only are the bending defects of the welded pipe effectively eliminated and high surface quality of the welded pipe is ensured, but also straightening on local bending of the welded pipe can be implemented by regulating the position of the lower V-shaped seat and quality of a processed finished product is improved.

Description

technical field [0001] The invention relates to the field of special equipment for mechanical straightening, in particular to a straightening device for eliminating bending defects of high-frequency straight seam welded pipes. Background technique [0002] At present, most manufacturers of high-frequency longitudinal welded pipes in China often produce steel pipes with excessive curvature during the processing of high-frequency longitudinal welded pipes. For such welded pipes with bending defects, traditional roller straightening is usually used. The straightening machine is used to straighten the bending, but there are often roll marks on the surface of the welded pipe after straightening, which affects the surface processing quality and appearance of the welded pipe, and the straightening effect is not ideal. New straightening device for surface finish quality of welded pipes. Contents of the invention [0003] The object of the present invention is to overcome the defi...

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Problems solved by technology

[0002] At present, most manufacturers of high-frequency longitudinal welded pipes in China often produce steel pipes with excessive curvature during the processing of high-frequency longitudinal welded pipes. For such welded pipes with bending defects, traditional roller straightening is usually used. The straightening machine is used to straighten the bending, but there are often roll marks on the surface of the welded pipe after straightening, which affects the surface processing quality and appearance of the welded pipe, and the straightening effect is not ideal. New Straightening Device for Surface Processing Quality of Welded Pipe

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