Twin Wire Welding Apparatus Equipotential Control
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Solution Overview
Problem
Existing twin wire welding methods face challenges in achieving high deposition rates and maintaining weld quality due to magnetic interference between electrodes, leading to distorted welds and reduced efficiency, especially when using a single power source for multiple electrodes.
Innovation Solution
A twin wire welding apparatus and method where two consumable electrodes are connected to a single power source through parallel contact tubes, allowing them to maintain the same potential, combined with a feeding arrangement for a cold wire introduced orthogonally into the weld puddle to control temperature and composition, enhancing deposition rates and weld quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple consumable electrodes are positioned in close proximity to each other to operate in a single weld puddle, then deposition rate increases, but magnetic interference between electrodes causes distorted welds
Solution Approach 1:
The patent connects multiple consumable electrodes to a common power source output that provides the same potential to all electrodes. This equipotential arrangement eliminates magnetic interference between electrodes by ensuring they are at the same electrical potential, allowing them to be positioned in close proximity without causing weld distortion, thereby enabling high deposition rates while maintaining weld quality
2Ease of operation
If separate power sources are used for each electrode to facilitate power control, then power supply control improves, but apparatus cost and complexity increase
Solution Approach 1:
The patent merges multiple power supply functions into a single power source that provides power to multiple consumable electrodes through a common output. This single power source design eliminates the need for multiple separate power sources while maintaining the ability to control power distribution, thereby reducing apparatus complexity and cost while preserving operational control
3Object-affected harmful factors
If electrodes are positioned at large distances to reduce magnetic interaction, then magnetic interference decreases, but electrodes cannot operate in the same weld puddle
Solution Approach 1:
The patent positions electrodes in close proximity within the same weld puddle while connecting them to a common power source output that provides the same potential to all electrodes. This equipotential connection eliminates magnetic interference between the closely positioned electrodes, allowing them to operate effectively in the same weld puddle without causing distortion, thereby maintaining both weld process quality and high deposition rate
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 approach increases deposition rates by up to 50% and improves weld quality by reducing peak temperatures and alloy vaporization, while allowing for retrofitting existing systems and efficient operation in constrained spaces.
Implementation Method 1
A first electric arc is created between a tip of the first consumable electrode and a work piece to be welded. A second electric arc is created between a tip of the second consumable electrode and the work piece
Implementation Method 2
The increased current density allows for increased pre-heating of the electrode, hence a higher deposition rate can be maintained at less heat transfer to the weld puddle
Implementation Method 3
a feeding arrangement for a cold wire introduced orthogonally into the weld puddle to control temperature and composition
Data Source
AI summary
A twin wire welding apparatus including a first contact tube for guiding a first consumable electrode toward a weld puddle and transferring welding current to the first consumable electrode, a second contact tube for guiding a second consumable electrode toward said weld puddle and transferring welding current to the second consumable electrode, and a single power source connected to said first and second contact tubes for providing the same potential to said two consumable electrodes, and a method for operating such an apparatus.