Back-chipping-free double-wire submerged arc welding method of pipe-shaped structure

A tubular structure, submerged arc welding technology, applied in welding equipment, arc welding equipment, manufacturing tools, etc., can solve the problems of large labor consumption, large flux consumption, irregular grooves, etc., to reduce labor intensity and environmental pollution , The effect of improving the internal quality of welding, saving time and cost
CN108672901AInactive Publication Date: 2018-10-19蓬莱大金海洋重工有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
蓬莱大金海洋重工有限公司
Publication Date
2018-10-19
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to the technical field of manufacturing of wind power generation tower frames, in particular to a back-chipping-free double-wire submerged arc welding method of a pipe-shaped structure. The welding method is aimed at the longitudinal seam and circular seam welding of a thin plate with the thickness smaller than or equal to 30 mm, and comprises the steps of carrying out beveling, rolling a barrel body, carrying out preheating, carrying out backing weld, filling a cover surface at welding joints and carrying out welding joint quality inspection. According to the back-chipping-free double-wire submerged arc welding method, the double-arc double-wire submerged arc welding is adopted, so that the welding efficiency is improved by one time; and the backing-chipping-free technology is adopted, so that the gouging process is omitted compared with a traditional carbon arc air gouging technology, the time and the cost are saved, the labor intensity and the environmental pollution are reduced, the welding surface after forming is attractive in appearance, and the welding internal quality is improved; and mixed gas of Ar and CO2 is adopted for consumable electrode gas shielded welding, so that the weld joints are smooth in molding, the grinding time is shortened, the welding quality is improved, and the qualified rate of the weld joints is high.
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Description

technical field

[0001] The invention relates to the technical field of wind power generation tower manufacturing, in particular to a double-wire submerged arc welding method without root cleaning of a tubular structure. Background technique

[0002] The wind power tower is an important structural part supporting the wind turbine head and an important part of wind power generation. Its main manufacturing process is monofilament submerged arc welding. The main manufacturing process of the wind power tower is longitudinal seam welding and assembly after coiling For the final girth welding, the welded groove generally adopts X-shaped groove with a groove angle of 60°. After welding on one side, carbon arc gouging is performed on the other side, and after root cleaning, the carbon arc gouging is removed. slag inclusions, scale and other impurities, and then single-wire submerged arc welding, which is widely used in the manufacture of towers, has a lot of disadvantages, due to cum...

Claims

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