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Method and device for controlling welding operation

A control method and operation technology, applied in welding equipment, manufacturing tools, arc welding equipment, etc., can solve problems such as lack of arc length methods, and achieve the effects of improving welding process quality, ensuring stability, and arc length stability

Active Publication Date: 2019-11-29
北京时代科技股份有限公司
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Problems solved by technology

[0004] Embodiments of the present invention provide a welding operation control method and device to solve the current problem of lacking a method for effectively controlling the arc length during welding

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  • Method and device for controlling welding operation
  • Method and device for controlling welding operation
  • Method and device for controlling welding operation

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Embodiment Construction

[0046] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0047] In the process of implementing the embodiments of the present invention, the inventors found that in general, when studying the arc length stability control of pulsed MIG welding, it is first necessary to determine what physical quantity is used as the feedback quantity. At present, the common arc length control methods all use the arc voltage as the feedback quantity, and the arc voltage feedback method can be divided into instantaneous voltage and cycl...

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Abstract

The invention provides a control method and device for welding operation and relates to the technical field of pulse welding. The control method comprises the steps that the current welding impedanceis determined as the feedback impedance according to the current welding current and the current welding voltage; the feedback impedance is compared with a preset impedance threshold value, and a comparison result is generated; according to the comparison result, a peak current preset value, a base current preset value and a base time preset value, the peak current, base current and base time of the next cycle of welding operation are determined respectively, and the pulse current waveform is determined by combining the peak time obtained in advance; and the welding current of the next cycle of welding operation is determined according to the pulse current waveform, and accordingly the next cycle of welding operation is conducted. By using the welding impedance as the feedback quantity forwelding control, melting control of a welding wire is completed, accordingly the length of a welding arc is controlled, and the stable length of the arc can be guaranteed in the welding process.

Description

technical field [0001] The invention relates to the technical field of pulse welding, in particular to a control method and device for welding operations. Background technique [0002] At present, in the field of modern production, pulsed metal inertia gas shielded welding (Metal Inertia Gas, pulsed MIG welding for short) is an efficient welding method, which can be applied to the production and processing of automobiles and industrial parts. However, the current pulsed MIG welding is susceptible to external interference during the welding process, such as welding torch disturbance, stem elongation changes, and workpiece inequality, which can easily cause changes in the length of the welding arc, affect the arc shape, heat output, and then affect the welding effect. [0003] Therefore, how to effectively control the arc length during welding has become an urgent problem to be solved. Contents of the invention [0004] Embodiments of the present invention provide a welding...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K9/173B23K9/09B23K9/095
CPCB23K9/09B23K9/095B23K9/173
Inventor 孙起麟
Owner 北京时代科技股份有限公司
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