Multi-Electrode Welding Start Synchronization for Stable Arc Ignition
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Solution Overview
Problem
Current multiple welding methods face challenges in achieving a quick and reproducible start, especially with slow wire feed speeds, due to unpredictable arc ignition between leading and trailing electrodes, leading to inaccurate positioning and uncontrolled material removal.
Innovation Solution
The control unit of the trailing electrode initiates welding wire feed before the leading electrode touches the workpiece, ensuring the trailing electrode ignites within the ionized area of the leading electrode's arc, allowing for synchronized and controlled arc ignition, even if the trailing electrode contacts first.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the welding wire feed of both electrodes is started simultaneously, then the starting process is simple, but the arc ignition becomes unpredictable leading to inaccurate positioning and uncontrolled material removal
Solution Approach 1:
The control unit of the follow-up electrode is configured to start the welding wire feed of the follow-up electrode before the guide electrode touches the workpiece. This preliminary action ensures that the follow-up electrode is already in position and ready to ignite within the ionized area when the guide electrode creates the arc, eliminating unpredictable ignition timing and ensuring accurate weld seam positioning.
2Loss of substance
If the welding wire feed speed is reduced, then the control over material removal is improved, but the starting process becomes slower and less reproducible
Solution Approach 1:
By initiating the follow-up electrode's wire feed in advance (before the guide electrode touches the workpiece), the system ensures that the follow-up electrode is already positioned correctly when the arc ignites. This preliminary positioning allows for slower, more controlled wire feed speeds during the actual welding process while maintaining reproducible and quick arc ignition, thus controlling material removal without sacrificing starting speed.
3Productivity
If the follow-up electrode ignites before the guide electrode, then the starting process may be faster, but the welding quality is reduced due to uncontrolled material removal
Solution Approach 1:
The system uses preliminary action by starting the follow-up electrode's wire feed before the guide electrode touches the workpiece, but the actual arc ignition is controlled to occur after the guide electrode has established its arc. The follow-up electrode ignites within the ionized area created by the guide electrode's arc, ensuring controlled material removal while maintaining fast and reproducible starting process.
4Adaptability or versatility
If separate welding equipment is used for each electrode, then independent welding processes are achieved, but the device complexity increases
Solution Approach 1:
The patent combines multiple welding processes into a single welding device with multiple welding wires (electrodes). The control unit coordinates the wire feed and arc ignition of multiple electrodes within one device, achieving independent control of each welding process while avoiding the complexity of multiple separate welding machines. This merging approach maintains adaptability and versatility while reducing device complexity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This method ensures consistent and reproducible arc ignition, improving welding quality by allowing the leading electrode to ignite first, reducing material removal issues and enhancing the starting process efficiency across various welding systems.
Implementation Method 1
ensuring the trailing electrode ignites within the ionized area of the leading electrode's arc
Data Source
Figure 1
Figure 2a~2d
Figure 3a~3d
AI summary
The aim of the invention is to provide a multiple welding method having an improved starting process. This aim is achieved, according to the invention, in that a starting process of the multiple welding method is carried out in that the control unit (9A) of the guide electrode starts welding-wire advancing of the guide electrode and sends a synchronization signal (Y) to the control unit (9B) of the trailing electrode when the guide electrode has moved a certain distance (zA) or for a certain time (tA), and the control unit (9B) of the trailing electrode starts welding-wire advancing of the trailing electrode in dependence on the received synchronization signal (Y) before the guide electrode touches the workpiece (6).