Automatic superposition pulse single-pass welding system and method for stainless steel pipe abutting connection

A technology of superimposing pulses and stainless steel pipes, applied in welding equipment, welding accessories, metal processing, etc., can solve the problems of inability to meet welding penetration requirements, low S content of stainless steel pipes, etc., to achieve good weld formation and welding quality, good welding Seam forming and welding seam fusion, the effect of small welding operation space

Active Publication Date: 2019-11-29
HARBIN ELECTRIC CORP QINHUANGDAO HEAVY EQUIP
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the very low S content of the stainless steel pipe, the conventional pulse single-pass automatic welding cannot meet the penetration requirements

Method used

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  • Automatic superposition pulse single-pass welding system and method for stainless steel pipe abutting connection
  • Automatic superposition pulse single-pass welding system and method for stainless steel pipe abutting connection
  • Automatic superposition pulse single-pass welding system and method for stainless steel pipe abutting connection

Examples

Experimental program
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Effect test

Embodiment 1

[0167] The inner diameter of the casing and connecting piece made of Z2CND18-12NS steel is 26mm, and the inner diameter of Z01CD26-01 steel is 28mm, and the melting ring is 0.5mm thick. After the butt joint, use image 3 and Figure 4 Positioning fixtures shown in are fixed and spot welded.

[0168] The positioning tool comprises a base 14 with a U-shaped structure with a flange, and the flange on one side is hinged with two legs of the support 13; The flange on the other side of the base 14 is hooked and connected. On the opposite side of the bracket 13 and the base 14, the locking screw 11 is connected with the pressing plate 12 in a U-shaped groove to fix the casing, the connecting piece and the melting ring.

[0169] After spot welding, the positioning tool is removed, and the TIG welding machine performs automatic welding. Wherein, the diameter of the tungsten rod 4 is 2.4mm; the cone angle of the cone 5 at the tip of the tungsten pole is 33°; the diameter of the tip p...

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Abstract

The invention provides an automatic superposition pulse single-pass welding system and method for stainless steel pipe abutting connection. The system comprises a stainless steel abutting connection pipe and a TIG welding machine. The method comprises the steps that during welding, the end parts of a casing and connecting piece and the inner diameter of a melting ring are machined and cleaned; thecasing, the connecting piece and the melting ring are assembled, and spot welding is carried out; after the welding equipment is installed and debugged, welding parameters are set, and welding is carried out. According to the automatic superposition pulse single-pass welding system and method for the stainless steel pipe abutting connection, under the condition that the electric heater of a voltage stabilizer is dense, the distance between the pipes is small and the welding operation space is small, effective welding between the casing of an electric heater and the connecting piece can be effectively realized; and a workpiece and a tungsten electrode are prevented from being in an overheated state for long time, so that the welding process is stable, and good weld forming and welding quality can be obtained.

Description

technical field [0001] The present invention relates to the field of welding, in particular to a welding method, in particular to a superimposed pulse single-pass automatic welding method for butt joints of stainless steel pipes, in particular to a S (sulfur) Automatic welding method for electric heater bushings and connectors with very low content. Background technique [0002] In nuclear power plants, the welding of the bushing of the voltage stabilizer electric heater and the connecting piece is a unique structure of this type of product. The product is equipped with 108 pieces of electric heaters in four circles. The distance between the tubes is small, only about 80mm. The welding operation space is narrow, and wire filling welding cannot be used. Only self-fluxing can be used to realize single-sided welding and double-sided forming. Need to weld in the horizontal welding position. [0003] According to the design requirements of the voltage stabilizer, the welding se...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K9/167B23K9/235B23K9/32B23K101/06
CPCB23K9/167B23K9/235B23K9/32B23K2101/06
Inventor 赛鹏孙国辉王莉杨云丽张海梅王恩泽王舒伟崔建龙隋旭
Owner HARBIN ELECTRIC CORP QINHUANGDAO HEAVY EQUIP
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