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Control method and system for pulse MIG (Metal-Inert Gas) welding electric arc

A pulse and arc technology, applied in welding equipment, arc welding equipment, manufacturing tools, etc.

Active Publication Date: 2013-07-17
广州焊王电气科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0027] Aiming at the problems existing in the pulse MIG welding method and system on the market, the present invention provides a pulse MIG welding arc control method and system, adopts corresponding technical measures, solves the above-mentioned problems existing in the traditional pulse MIG welding, and obtains excellent results The welding process effect

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  • Control method and system for pulse MIG (Metal-Inert Gas) welding electric arc

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Embodiment

[0038] The invention provides a pulse MIG welding arc control method, the control method adopts the open-loop feedforward control mode of the welding wire feeding speed signal and the closed-loop negative feedback control mode of the arc length signal to jointly control the arc width or pulse frequency of the pulse MIG arc , in order to maintain the dynamic balance of the welding wire feeding speed and melting speed, and maintain the arc length of the system constant and the jet transition of the droplet when the welding current adjustment (through the wire feeding speed adjustment), the wire feeding speed disturbance or the arc length disturbance occurs The method remains the same.

[0039] The pulsed MIG welding arc control method provided by the present invention controls the arc width or pulse frequency of the pulsed MIG arc due to the open-loop feedforward control mode of the welding wire feeding speed signal, that is, the welding average current and the welding average cu...

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Abstract

The invention discloses a control method and system for a pulse MIG (Metal-Inert Gas) welding electric arc. The method and the system disclosed by the invention has the advantages that the pilot-arc width or the pulse frequency of the pulse MIG electric arc is commonly controlled in a loop-opened feed-forward control mode of a welding-wire feeding speed signal and a loop-closed negative-feedback control mode of an electric arc length signal so as to maintain dynamic balance of the feeding speed and the fusion speed of welding wires and maintain constant electric arc length of the system and a constant jet transient mode of molten drops when welding current adjustment (by adjusting the wire-feeding speed), wire-feeding speed disturbance or arc length disturbance occurs. In addition, the invention also discloses a new process which adopts the method and the system and is used for controlling the fusion depth and the forming of welding seams by adopting a pulsating feeding mode for welding.

Description

technical field [0001] The present invention relates to a welding method and equipment, especially a control method of a pulsed MIG welding arc and a control system for realizing the method. Background technique [0002] Pulse MIG welding method, also known as pulse MIG shielded welding, the melting electrode is welding wire, and the main body of shielding gas is inert gas, accounting for more than 80% of the total shielding gas flow. The welding current of pulsed MIG welding adopts pulsed current waveform, the purpose of which is to obtain a superior droplet jet transfer mode at a lower average current. When the welding droplet transfer is in the jet transfer mode, the arc is very stable, there is no welding spatter, the arc heat input and penetration are strong, the weld shape is very good, and the weld quality is high. DC MIG welding must be above the critical current value of the welding wire to obtain the jet transition mode. The peak current of pulsed MIG welding exce...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K9/173B23K9/095B23K9/09
Inventor 洪东升
Owner 广州焊王电气科技有限公司
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