Welding control method and apparatus, and welding machine and storage medium

By monitoring the real-time rate of change of welding current and voltage, the welding status can be accurately determined, solving the problem of wire misjudgment in traditional welding methods and improving the stability and quality of the welding process.

WO2026113118A1PCT designated stage Publication Date: 2026-06-04CHENGDU CRP ROBOT TECH CO LTD
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Patent Information

Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
CHENGDU CRP ROBOT TECH CO LTD
Filing Date
2024-12-31
Publication Date
2026-06-04

AI Technical Summary

Technical Problem

Traditional welding methods make it difficult to accurately determine the short circuit and arc conditions when the welding wire diameter is small and the welding current is large, resulting in unstable welding, welding wire burning and breakage, and weld quality problems.

Method used

By monitoring the real-time rate of change of welding current and voltage, the contact time between the welding wire and the workpiece, the necking time of the molten droplet, and the arc ignition judgment time can be determined. The welding current and voltage can be adjusted to accurately judge the welding state and avoid overheating of the welding wire and misjudgment.

Benefits of technology

It improves the stability of the welding process, reduces wire spatter and weld quality problems, and ensures welding quality.

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Abstract

A welding control method, which comprises: during welding, monitoring a welding current, and determining a first moment on the basis of a real-time change rate of the welding current, wherein the first moment is a moment when a welding wire of a welding machine starts to come into contact with a workpiece; starting from the first moment, monitoring a welding voltage, and determining a second moment on the basis of a real-time change rate of the welding voltage, wherein the second moment is a moment when necking occurs in a molten droplet at a tail end of the welding wire; and determining a third moment on the basis of the second moment, and starting from the third moment, performing arc ignition determination on the basis of the welding voltage and the real-time change rate of the welding voltage. Therefore, molten droplet necking and arc ignition are accurately determined, thereby effectively reducing the problems of spatter caused by the necking process and wire explosion caused by erroneous arc ignition determination, and reducing factors that cause instability in the welding process. The present disclosure further relates to a welding control apparatus, a welding machine and a computer-readable storage medium.
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