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A Welding Pool Stability Control Method and Its Application Based on Double Arc Vibration

A technology of welding molten pool and double arc, which is applied in the field of stability regulation of welding molten pool based on double arc vibration and arc heat source welding pool stability, can solve the problems of difficulty in automation and low manufacturing efficiency, and achieve improvement The effect of welding manufacturing efficiency, reducing high temperature liquid metal, and improving welding production efficiency

Active Publication Date: 2021-03-30
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] According to the above-mentioned single-arc heat source welding, there is still a technical problem of low manufacturing efficiency or difficulty in realizing automation in the adjustment of molten pool stability, and a method and application of welding molten pool stability control based on double-arc vibration are provided.

Method used

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  • A Welding Pool Stability Control Method and Its Application Based on Double Arc Vibration
  • A Welding Pool Stability Control Method and Its Application Based on Double Arc Vibration
  • A Welding Pool Stability Control Method and Its Application Based on Double Arc Vibration

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Effect test

Embodiment 1

[0038] Taking the Q235-B plate butt transverse welding seam with a plate thickness of 24mm as an example, the welding process of MIG / MAG-TIG double arc vibration heat source applied to the high-efficiency welding method of butt transverse welding of medium and thick plates is described in detail. The welding process for butt weld horizontal welding of medium and thick plates is as follows:

[0039] A single-sided welding groove is processed on the test plate, the blunt edge of the root is 0-1.0mm, and the single-sided welding groove is V-shaped. After the test plate is assembled, the included angle is 10-30°. Positioning spot welding is adopted. After positioning, the test plate gap is 1.0-2.0mm. Before welding, grind the single-side welding groove and the range of 10-30mm on both sides, and clean the groove and the impurities on both sides. Combining the welding torches respectively connected to the gas shielded welding power source and the pulsed gas shielded welding power ...

Embodiment 2

[0043] Taking the arc additive manufacturing welding of ER5356 aluminum alloy welding wire with a diameter of 1.2mm as an example, the welding process of MIGTIG dual arc vibration heat source applied to arc additive manufacturing is described in detail. The implementation of arc additive manufacturing welding process is as follows:

[0044] The square aluminum alloy structural part required to be produced has a wall thickness of 10mm, a length, width, and height of 300mm, 300mm, and 600mm, respectively, and is formed by additive manufacturing with a multi-layer single-channel MIG-TIG double-arc vibration eutectic pool heat source.

[0045] Through the surfacing test, the process parameters of the deposited metal forming width of 9-10mm are obtained: MIG welding current 260A, TIG welding peak current 360A, TIG base value current 120A, pulse frequency of TIG current 80-120Hz, filament spacing 20mm, The welding speed is 12mm / s, and the flow rate of argon gas is 15-22L / min; under ...

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Abstract

The invention provides a welding pool stability adjustment and control method based on double-arc vibration and the application of the welding pool stability adjustment and control method based on double-arc vibration. The welding pool stability adjustment and control method based on double-arc vibration is characterized in that according to a needed welding formation object, after a welding gun connected with a MAG / MIG power source and a welding gun connected with a pulse type TIG power source are compounded at a certain angle and a certain distance, welding is conducted on plates to be welded. The welding pool stability adjustment and control method based on double-arc vibration mainly utilizes the electromagnetic repulsion effect between the arc of direct current reverse polarity and the pulse arc of direct current straight polarity to form a double-arc vibration heat source with front end arc offset vibration and back end arc pulse fluctuation, so that whole-position efficient welding is achieved beneficially, and more accurate welding formation is achieved; the provided double-arc vibration co-pool heat source can achieve whole-position welding and arc fuse wire additive manufacturing under the large-parameter high-speed conditions, the machining and manufacturing efficiency is remarkably improved, residual stress is reduced, and the machining and formation precision is improved.

Description

technical field [0001] The invention belongs to the field of material processing engineering, and relates to a method for controlling the stability of an arc heat source welding pool, in particular to a method for controlling the stability of a welding pool based on double arc vibration and its application. Background technique [0002] Horizontal welding, vertical welding and overhead welding are the main welding methods for complex components such as large storage tanks, ship sections and locomotive frame beams. In the above-mentioned all-position arc welding, the molten pool metal and molten droplets tend to fall due to the action of gravity, which is prone to defects such as weld bumps, undercuts, and even molten metal dripping down. It is necessary to strictly control the flow behavior of the molten pool metal to reduce the fluctuation. Arc fuse additive manufacturing technology is a new preparation method that uses arc melting wire superposition to realize additive ma...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K9/08B23K9/04B23K9/16B23K9/02
CPCB23K9/02B23K9/04B23K9/08B23K9/16
Inventor 刘黎明周彦彬张兆栋宋刚
Owner DALIAN UNIV OF TECH
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