A melting nozzle electroslag welding method and its arc extinguishing device

A technology of electroslag welding and melting nozzle, which is applied in the field of welding, can solve problems such as the decline of welding quality, waste of manpower, material resources and financial resources, etc., and achieve the effects of high success rate of arc striking, improvement of welding quality and work efficiency

Active Publication Date: 2020-07-14
CHINA HUAYE GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Lead to a decline in welding quality, resulting in a great waste of manpower, material and financial resources

Method used

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  • A melting nozzle electroslag welding method and its arc extinguishing device
  • A melting nozzle electroslag welding method and its arc extinguishing device
  • A melting nozzle electroslag welding method and its arc extinguishing device

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Embodiment Construction

[0024] Embodiments of the nozzle electroslag welding method and its arc extinguishing device according to the present invention will be described below with reference to the accompanying drawings. Those skilled in the art would recognize that the described embodiments can be modified in various ways or combinations thereof without departing from the spirit and scope of the invention. Accordingly, the drawings and description are illustrative in nature and not intended to limit the scope of the claims. Also, in this specification, the drawings are not drawn to scale, and like reference numerals denote like parts.

[0025] A nozzle electroslag welding method, comprising the following steps:

[0026] The workpieces to be welded are placed in pairs with the welding gap, and the arc starting block is installed at the lower end of the welding gap, and the arc extinguishing block is placed at the upper end. Such as figure 1 , figure 2 As shown, the arc extinguishing block 10 is ...

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PUM

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Abstract

The invention discloses a consumable nozzle electroslag welding method and an arc quenching device thereof. The method comprises the following steps that a vertical through hole is formed in an arc quenching block, and horizontal through holes communicating with the vertical through hole are formed in the side face of the arc quenching block; to-be-welded workpieces are placed in an assembled manner through a welding gap, and the arc quenching block and an arc striking block are arranged at the upper end and the lower end correspondingly; a consumable nozzle is inserted in the welding gap through the vertical through hole, a welding wire is inserted into the consumable nozzle to make contact with the arc striking block for arc striking, continuous wire feeding is conducted, soldering fluxis smelted, a slag pool is formed, and a molten pool located below the slag pool is formed through melting of the welding wire, the consumable nozzle and the to-be-welded workpieces; continuous welding is conducted till the slag ascends and flows out of the horizontal through holes, it is observed that the molten pool ascends to the upper end faces of the to-be-welded workpieces from the verticalthrough hole, arc extinguishing is conducted, and welding is stopped. The arc extinguishing block mounting and dismounting time is saved, the arc extinguishing time is convenient to control, and the welding quality is improved. Before arc striking, the end portion of the consumable nozzle and the end portion of the welding wire make contact and rub with base metal many times, and the arc strikingsuccess rate is high. After welding interruption, a plurality of welding wire sections are used for arc striking, and the arc striking success rate is high.

Description

technical field [0001] The invention relates to the field of welding technology, in particular to a nozzle electroslag welding method and an arc extinguishing device. Background technique [0002] Nozzle electroslag welding uses the resistance heat generated by current passing through high-temperature liquid slag as a heat source to melt the workpiece (steel plate, casting, forging) and filler metal (welding wire, melting nozzle) to be welded, and the molten metal is in the form of droplets Through the liquid slag pool, it gathers in the lower part of the slag pool to form a molten metal pool. Due to the continuous feeding and melting of the welding wire, the molten metal pool continues to rise, and the metal in the lower part of the molten pool gradually moves away from the heat source and gradually solidifies to form a weld. Nozzle electroslag welding has the advantages of being suitable for thick workpieces, no need to process grooves, and small welding deformation. It i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K25/00
CPCB23K25/00
Inventor 成鹏刘乐时
Owner CHINA HUAYE GROUP
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