Electroslag welding method for cylindrical longitudinal seam V groove

Abstract

The invention discloses an electroslag welding method for a cylindrical longitudinal seam V groove, which is implemented by the following steps: gas-cutting a butted part of workpieces into a single groove, curling a workpiece into a cylindrical shape, making the single groove combined into a double V groove, and priming the bottom of the V groove to form a priming weld seam; and erecting the cylindrical workpiece on an electroslag welding fixed beam, attaching cooling copper sliding blocks to the excircle of a cylinder body on the outside of an opening of the double V groove, electrifying a filament to smelt a welding stick and metal on the V surface of the groove of the workpiece to form a weld pool, continuously sending filaments into the weld pool, introducing cooling water to the cooling copper sliding blocks outside the weld pool, spraying water to the inner wall of the priming weld seam, in the welding process, making the cooling copper sliding blocks synchronously raised along with a welding head, and making electroslag weld seam reliably welded with the double V groove and the priming weld seam to complete the welding. The method has the advantages of high welding quality and high welding efficiency.

Description

technical field [0001] The invention belongs to the technical field of mechanical manufacturing, and in particular relates to an electroslag welding method for a V-shaped groove of a cylindrical longitudinal seam. Background technique [0002] For hollow cylindrical workpieces such as the large rope pulley in the middle of the rolling mill looper and the pinch roller on the down coiler, the thickness is between 50mm and 70mm. The existing welding technology generally uses steel plate bending first, and then submerged arc welding. Automatic welding for welding. The track of submerged arc automatic welding is a straight line. In order to ensure the welding quality, the uniformity of the groove is required to be relatively high, and the angle consistency of the groove is relatively good. The fusion surface of the groove needs to be polished to reveal the metallic luster. The processing method can fully meet the requirements, and at the same time, the operator is required to ad...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for electroslag welding of a cylindrical longitudinal seam V-shaped groove, which solves the problem of strict welding groove requirements, long preparation time, high welder skill requirements and welding problems in the prior art using submerged arc automatic welding. The cycle is long; while using the electroslag welding method, it is difficult to clamp the cylindrical groove and it is difficult to carry out welding

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