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Highly effective monofilament narrow clearance active gas protecting welding method

A technology of active gas and shielded welding, which is applied in the direction of welding equipment, electrode characteristics, arc welding equipment, etc., can solve the problems of low welding speed and welding wire melting speed, limitation of pulse mode, complicated adjustment process, etc., and achieve fast welding speed and adjustment Simple, high melting speed effect

Inactive Publication Date: 2006-07-12
SHANGHAI JIAOTONG UNIV +1
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AI Technical Summary

Problems solved by technology

The disadvantage is that there are many adjustment parameters, the adjustment process is complicated, and limited by the pulse mode, the welding speed and welding wire melting speed are relatively low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0010] Provide following embodiment in conjunction with content of the present invention:

[0011] The specific implementation process of a high-efficiency single-wire narrow-gap active gas shielded welding method will be described in detail below in conjunction with the examples.

[0012] V-shaped groove is used, the thickness of the workpiece is 28mm, the minimum gap is 4mm, the groove angle is 20°, the maximum gap is 14mm, the width is 180mm, and the length is 610mm. The material of the test plate is the butt joint of ASTM A572, and the welding position is flat. weld. The wire material is ER50S-G with a diameter of 1.2mm. The welding power supply with ordinary flat outer characteristics is used, and the conductive tip, welding wire and the positive pole of the welding power supply are connected through the cable and the conductive mechanism of the welding torch, and the workpiece and the negative pole of the welding power supply are connected through the cable. The flow r...

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Abstract

The efficient single-filament narrow-gap active protected welding method belongs to the field of welding technology. The present invention adopts ternary protecting gas comprising oxygen, carbon dioxide and argon and welding filament in the center, and controls the extended length of large welding filament, filament feeding speed and voltage to obtain stable rotary ejecting transition mode so as to realize the well fusion between the inner groove weld bead and workpiece in certain gap. The present invention has simple regulation, convenient operation, fast welding filament feeding speed and high welding efficiency, and can realize narrow gap welding with central single filament, single weld bead and several layers.

Description

technical field [0001] The invention relates to a shielded welding method, in particular to a high-efficiency single-wire narrow-gap active gas shielded welding method, which belongs to the field of welding technology. Background technique [0002] Since narrow-gap welding was proposed in the 1960s, welding workers in various countries have invented a large number of narrow-gap welding technologies. In the single wire narrow gap gas shielded welding technology, the droplet transfer method can be divided into three categories: short circuit transfer method, jet transfer method, and rotating jet transfer method. The main technical difficulty lies in how to ensure that the side of the narrow groove depth can be fully penetrated, and how to reduce the spatter during the welding process so as to reduce the impact on the welding quality of the subsequent weld bead. [0003] After literature search, it is found that the Chinese patent application number is: 01138322.4, the patent ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K9/16B23K9/09B23K9/24
Inventor 周昀包晔峰杨海澜曹平林观志施成源
Owner SHANGHAI JIAOTONG UNIV
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