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High frequency-electric arc composite welding method

A hybrid welding and arc welding technology, used in welding equipment, metal processing equipment, manufacturing tools, etc., can solve problems such as difficulty in general application, and achieve the effect of solving heat shortage, heating directly and quickly, and promoting homogenization.

Active Publication Date: 2018-01-12
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Such high welding efficiency is unmatched by other welding methods
However, traditional high-frequency welding requires an external upsetting force to act on the base metal on both sides of the weld, so that the surface to be welded is squeezed at high temperature to form a bond, so it has great limitations in terms of welding structure and welding quality, and it is difficult to widely used
There is no report on the combination of high frequency contact welding and arc welding

Method used

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Examples

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Effect test

Embodiment 1

[0041] 3.5mm thick carbon steel Q235-b butt welding. The parameters of high frequency-melting electrode gas shielded arc hybrid welding are: weld gap 5 controlled at 0.8mm, welding speed 25mm / s (1500mm / min), high frequency power supply output current frequency 600kHz, anode voltage 5kV, anode current 2A, arc The welding voltage of the welding machine is 20V, the current is 170A, the wire feeding speed is 16m / min, the shielding gas is argon, the flow rate is 15L / min, and the welding wire is ER50-6 low carbon steel welding wire with a diameter of 1.0mm. The parameters of high-frequency-non-melting electrode gas-shielded arc hybrid welding are: weld gap 5 controlled at 0.8mm, welding speed 10mm / s (600mm / min), high-frequency power supply output current frequency 600kHz, anode voltage 5kV, anode current 2A, The welding voltage of the arc welding machine is 10V, the current is 120A, the wire feeding speed is 8m / min, the shielding gas is argon, the flow rate is 15L / min, and the weldi...

Embodiment 2

[0043] Butt welding of 3.0mm thick carbon steel Q235-b and 3.0mm 1060 pure aluminum, the detailed parameters of high frequency-melting electrode gas shielded arc composite are as follows: weld gap 5 is controlled at 0.8mm, welding speed is 20mm / s (1200mm / min ), high-frequency power supply output current frequency 600kHz, anode voltage 2kV, anode current 0.5A, arc welding machine welding voltage 13V, current 110A, wire feeding speed 11m / min, shielding gas is argon, flow rate 15L / min, welding wire diameter 0.8mm ER4043 Al-Si alloy welding wire. The detailed parameters of the high-frequency-non-melting electrode gas-shielded arc composite are as follows: the weld gap 5 is controlled at 0.8mm, the welding speed is 10mm / s (600mm / min), the output current frequency of the high-frequency power supply is 600kHz, the anode voltage is 2kV, and the anode current is 0.5A , The arc welding machine has a welding voltage of 10V, a current of 100A, a wire feeding speed of 6m / min, a shielding g...

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Abstract

The invention discloses a high frequency-electric arc composite welding method. According to the method, two welding methods of electric arc welding and high frequency welding are composited; a high frequency current is fed into a workpiece while electric arc welding is performed; by means of a strong skin effect and a proximity effect of the high frequency current, high frequency resistant heat is made to be generated in a molten pool and in the side wall of a weld joint at the front edge of the molten pool; and part of the welding energy is directly fed to the to-be-welded face of base metal, the limitation that the fusion depth is small and the welding speed is low because of a heat conduction mechanism of traditional electric arc welding can be broken through, and the fusion depth of welding and the welding efficiency are substantially improved. Meanwhile, a high frequency alternating magnetic field generated by the high frequency current has a certain stirring agitation effect onmetal of the molten pool, and the weld joint structure and weld joint forming can be improved easily. Besides, the method can also be used for melt-brazing and brazing of dissimilar metal; in the welding process that brazing flux is used, the method can effectively improve the film removing effect of the brazing flux, moistening and laying of solder metal on the surface of the base metal, especially on the back side of the base metal, are greatly promoted, and weld joint forming is improved.

Description

technical field [0001] The invention belongs to the technical field of technical material processing and welding, and in particular relates to a high-frequency-arc compound welding method. Background technique [0002] As the most widely used welding method, arc welding has the advantages of simple equipment, low cost, and convenient operation, which is difficult for other welding methods, and it has created its irreplaceable position in welding production. With the development of modern industry and the continuous application of new materials and thick structures, industrial production has higher and higher requirements for welding efficiency and quality. Traditional arc welding is a typical heat conduction welding method. The heating of the workpiece depends on heat conduction. The heat conduction rate in the workpiece varies with the nature of the material itself and takes a certain amount of time. Therefore, the penetration depth is limited by the heat conduction effic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K28/02
Inventor 黄继华叶政程志谢立
Owner UNIV OF SCI & TECH BEIJING
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