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Welding method of flange plate and web plate of q390d steel crane girder in heavy work system

A welding method and flange plate technology, applied in welding equipment, welding/welding/cutting items, manufacturing tools, etc., can solve the problems that welding methods cannot be borrowed, and achieve the effects of reducing energy consumption, improving welding quality, and saving energy

Active Publication Date: 2017-03-15
CHINA 19TH METALLURGICAL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the large difference in alloy composition between Q390D steel and Q345, Q370qE steel, the welding method used for Q345, Q370qE steel components cannot be borrowed from Q390D steel

Method used

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  • Welding method of flange plate and web plate of q390d steel crane girder in heavy work system
  • Welding method of flange plate and web plate of q390d steel crane girder in heavy work system

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Embodiment Construction

[0032] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0033] like figure 1 As shown, the welding method of the heavy-duty working system Q390D steel crane beam flange plate and web plate of the present invention, the Q390D steel plate with a thickness of 50 to 60 mm is cut into a flange plate weldment, and the Q390D steel plate with a thickness of 34 to 36 mm is cut into The web weldment, followed by the full penetration butt welded web weldment to make the web, the full penetration butt welded flange plate weldment to make the flange plate, the full penetration T-welded combination welded web and flange plate will Welding of web and flange plates into crane girders; including fabricating web and flange plate welds with butt weld grooves, dehumidification of web and flange plate welds, full penetration butt weld web welding Welding parts are made into web and full penetration butt welded flange plate Weld...

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Abstract

The invention discloses a flange plate and web welding method for a heavy derrick Q390D steel crane beam. The method comprises the six steps of manufacturing web welding parts and flange plate welding parts with butt welding grooves, dehumidifying the web welding parts and the flange plate welding parts, welding the web welding parts in a butting and full penetration mode to form a web, welding the flange plate welding parts in a butting and full penetration mode to form a flange plate, performing heat preservation and slow cooling on a web sealing joint an a flange plate sealing joint, combing and welding the web and the flange plate in a T shape in a full penetration mode, and performing heat preservation and slow cooling on a crane beam welding joint. In the process of manufacturing the web or the flange plate, the web welding parts and the flange plate welding parts are not preheated before welding; in the crane beam manufacturing process, the web and the flange plate are not preheated before welding. According to the flange plate and web welding method, the automatic submerged arc welding multi-layer and multi-pass welding technology is adopted, the welding automation degree is high, few cold cracks exist in a welding joint structure, the welding quality is high, the labor intensity of welding work is low, the welding cost is low, and welding time is greatly shortened.

Description

technical field [0001] The invention relates to the field of welding technology, in particular to a welding method for a flange plate and a web plate of a heavy duty Q390D steel crane girder. Background technique [0002] The national standard "Code for Design of Cranes" (GB / T3811-2008) divides cranes into four levels: light, medium, heavy, and extra-heavy according to the frequency with which the load of the crane reaches its rated value. The hook bridge crane is the heavy class, and the metallurgical bridge crane is the super heavy class. For setting the above-mentioned crane girder, it is correspondingly divided into light grade, medium grade, heavy grade and extra heavy grade. The crane beam is a beam frame that provides support for lifting heavy objects in industrial plants. The crane rail is fixedly arranged on the crane beam, and the driving is movably arranged on the crane rail. The crane girder includes a web and flange plates arranged at both ends of the web, an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K28/02B23K101/28
CPCB23K28/02B23K2101/28
Inventor 陈川宝
Owner CHINA 19TH METALLURGICAL CORP
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