Stability closed-loop control method and system for double-wire indirect electric arc welding with electric signal feedback

The closed-loop control method for stability of dual-wire indirect arc welding using electrical signal feedback solves the problem of poor stability in the BC-TWIAW process, achieves stable combustion of the composite arc and improves welding quality, broadens the process window, and reduces dependence on operator skills.

CN121423762BActive Publication Date: 2026-04-10SHANDONG UNIV
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Patent Information

Application Number
CN202512034367.6
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2025-12-31
Publication Date
2026-04-10
Estimated Expiration
2045-12-31

AI Technical Summary

Technical Problem

The existing bypass coupled twin-wire indirect arc welding (BC-TWIAW) process suffers from poor process stability, narrow process window, and lack of self-adjustment capability. In particular, when the arc length fluctuates and the droplet transfer is unstable, short circuits and mismatch in the synchronous combustion state of the composite arc are prone to occur, resulting in poor weld formation and difficulty in ensuring internal quality.

Method used

A closed-loop control method for stability of dual-wire indirect arc welding using electrical signal feedback is adopted. By acquiring process data and control variables of the ideal welding state, a process database is established, electrical signals are collected in real time for feature extraction, and a neural network controller is used to calculate the wire feed speed adjustment, thereby realizing automatic adjustment of the wire feed speed and ensuring stable combustion of the composite arc.

Benefits of technology

It achieves stable control of the welding process, broadens the process window, improves welding quality and process reliability, reduces welding defects, reduces dependence on operator skills, and has high response speed and anti-interference capabilities.

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Abstract

The application discloses a double-wire indirect electric arc welding stability closed-loop control method and system of electric signal feedback, relates to the technical field of metal material welding, acquires process data and control variables of a bypass coupled double-wire indirect electric arc welding ideal state, establishes a process database based on a mapping relationship of the process data and the control variables, collects electric signals in a welding process in real time, extracts features of the electric signals, and obtains electric characteristic quantities; based on a current process parameter combination, corresponding ideal electric characteristic quantities are obtained in the process database, based on the ideal electric characteristic quantities and the electric characteristic quantities, a deviation is obtained; the deviation is input to a neural network controller for adjustment control, an output wire feeding speed adjustment amount is output, and then an adjustment signal is obtained; based on the adjustment signal, the wire feeding speed is adjusted, stable combustion of a composite electric arc is realized, a process window is widened, and welding quality and process reliability are improved.
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