Flange welding method and welding device

Abstract

The invention discloses a flange welding method. The method comprises the following steps of: arranging chunk seats at the two ends of rails; arranging flanges on the chunk seats; placing steel tubes on automatic adjusting brackets; adjusting the positions of the steel tubes so as to butt the steel tubes with the flanges; after finishing butting, performing spot-welding on the flanges; removing the automatic adjusting brackets; driving the chunk seats to rotate by using driving devices; and simultaneously driving the flanges to rotate and welding by using welding equipment. A flange welding device comprises two rails; automatic adjusting brackets are arranged on the rails; a fixed chunk seat and a moveable chunk seat are respectively arranged at the two ends of the rails; and rotary supports, the driving devices and flexible welding equipment are arranged on the two chunk seats. The method and the device have the advantages that: the flanges can be prevented from being deforming when welding so as to ensure welding quality; and the steel tubes cannot jitter when welding seam circular tubes, polygonal tubes and conical tubes with the flanges. The horizontal movement of the steel tubes can be realized by using the automatic adjusting brackets so as to realize the accurate butt of the steel tubes and the flanges.

Description

technical field [0001] The invention particularly relates to a flange welding method and a welding device. Background technique [0002] The existing flange welding device is composed of two rails, welding equipment arranged at both ends of the rails, and two automatic adjustment brackets arranged on the rails between the two welding equipments. The automatic adjustment brackets can be moved along the The track moves and can be lifted up and down. Before welding, place the steel pipe on the automatic adjustment bracket, adjust the automatic adjustment bracket so that the steel pipe is in a horizontal position, then fit the flange on both ends of the steel pipe, first spot weld the flange, and the electric motor on the automatic adjustment bracket The roller drives the steel pipe to rotate, and the flange is welded on the steel pipe by welding equipment. This welding method is only suitable for seamless round pipes. When it is used for the welding of seamed round pipes, pol...

AI Technical Summary

Problems solved by technology

This welding method is only suitable for seamless round pipes. When it is used for the welding of seamed round pipes, polygonal pipes, tapered pipes and flanges, the steel pipe will vibrate when it rotates.

In addition, because the flange is not fixed, deformation occurs during welding, which affects the welding quality, especially for large-size flanges, and qualified products cannot be processed

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