A Flange Taper Correction Method After Tower Flange Welding

Abstract

The invention discloses a flange conicity correction method after welding between a tower drum and a flange. The correction method comprises following steps: utilizing an Easy Laser laser measuring instrument to measure flange conicity after cooling welding positions of the tower drum, the flange and a wind electricity tower drum; labeling an arc section with flange measurement value out of tolerance based on the measurement report of a flange leveling instrument and utilizing a baking gun to perform flame straightening operation in a heating zone corresponding to a labeling position with the temperature for flame straightening being 600-650 DEG C, wherein the heating zone is the one from a weld center line to a side weld fusion line of a drum bottom, the arc length of flame straightening is the same with that of out-of-tolerance for the flange, and the flange is prevented from being heated on the flange side or prevented from being directly heated. The flange conicity correction method after welding between the tower drum and the flange has following beneficial effects: clear requirements are brought forward for flame properties and distance between flame and a workpiece; parameters of different kinds of fireworks are set; and according to the correction method, flange conicity can be corrected once so that the flange conicity can meet the demand for production.

Description

technical field [0001] The invention relates to a correction method, in particular to a method for correcting the taper of a flange after a tower flange is welded. Background technique [0002] In recent years, in order to achieve sustainable development and use of green energy, wind power has been widely used. As the infrastructure of wind power generation, the tower tube must strictly control the welding deformation during the welding process with the flange, and the flange is required to be inclined inside and flat outside. At present, after the welding of the tower and the flange is completed, after the welding position is cooled, it is necessary to use corresponding instruments and equipment to measure the taper of the flange, and then perform pyrotechnic correction on the position where the measured value is out of tolerance. In the usual pyrotechnic straightening process, there are clear requirements for the flame straightening temperature of the flange taper, but th...

AI Technical Summary

Problems solved by technology

In this way, although the taper of the flange can also be corrected, the accuracy of the correction is difficult to grasp, and often requires multiple pyrotechnic corrections to meet the corresponding taper requirements, resulting in prolonged production time and increased production costs.