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A kind of pulse mig welding arc control method

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

Active Publication Date: 2016-08-17
广州焊王电气科技有限公司
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  • Summary
  • 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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  • A kind of pulse mig welding arc control method
  • A kind of pulse mig welding arc control method

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Embodiment

[0038] The invention provides a pulsed MIG welding arc control method. The control method adopts an open-loop feedforward control method of a wire feed speed signal and a closed-loop negative feedback control method of an arc length signal to jointly control the arc width or pulse frequency of a pulsed MIG arc , In order to maintain the dynamic balance of wire feed speed and melting speed, and maintain the arc length of the system and the jet transfer of the droplets when welding current adjustment (adjusted by wire feeding speed), wire feeding speed disturbance or arc length disturbance occurs The way remains unchanged.

[0039] The pulsed MIG welding arc control method provided by the present invention uses the open-loop feedforward control method of the wire feed speed signal to control the arc width or pulse frequency of the pulsed MIG arc, that is, the average welding current and the pulse frequency are adjusted according to the wire feed speed. The welding wire melting spee...

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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 invention relates to a welding method and equipment, in particular to a pulse MIG welding arc control method. Background technique [0002] The pulse MIG welding method is also called pulse molten inert gas shielded welding. The melting electrode is welding wire and the main shielding gas is inert gas, which accounts for more than 80% of the total shielding gas flow. The welding current of pulse MIG welding adopts pulse current waveform, which aims to obtain a superior droplet jet flow transition 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 formation is 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 flow transition mode. Pulse MIG welding has a peak current exceeding the critical current value of the welding wire ...

Claims

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Application Information

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Patent Type & Authority Patents(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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