Arc Welding Power Supply with Alternating Arc and Hotwire Phases
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Solution Overview
Problem
Existing welding systems require expensive equipment and are difficult to integrate multiple power sources for heating both the workpiece and consumable filler material, making them costly and complex to implement in both manual and automated welding operations.
Innovation Solution
A welding system with a power supply that alternates between an arc phase and a hotwire phase, using control circuitry to manage power output, allowing a single power supply to provide both arc and hotwire functions, thereby reducing heat input to the workpiece and efficiently heating the welding electrode without producing an arc.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If multiple power sources are used to heat both the workpiece and consumable filler material, then the heating effectiveness is improved, but the equipment cost and system complexity increase
Solution Approach 1:
The patent combines the functions of heating the workpiece and heating the filler material into a single power source. The power supply alternates between providing arc heating to the workpiece and resistive heating to the filler material through the electrode, eliminating the need for separate power sources while achieving both heating objectives.
Solution Approach 2:
The power supply operates in periodic cycles, alternating between arc phase (heating workpiece) and hotwire phase (heating filler material). This periodic switching allows a single power source to perform both heating functions sequentially, reducing equipment complexity while maintaining effective heating of both components.
2Device complexity
If a single power supply is used for both arc and hotwire functions, then the equipment cost and complexity are reduced, but the ability to independently control heating parameters is limited
Solution Approach 1:
The power supply dynamically adjusts its output characteristics by switching between different operational modes (arc phase and hotwire phase). During each phase, the power supply provides optimized parameters for that specific function, effectively achieving independent control through temporal separation rather than spatial separation of power sources.
Solution Approach 2:
The system changes electrical parameters (voltage, current, duty cycle) to achieve different heating effects from the same power source. By varying the duty cycle and current characteristics between arc and hotwire phases, the system maintains adaptability and versatility while using a single power supply unit.
3Productivity
If continuous arc heating is used to heat the filler material, then the metal deposition rate is improved, but the heat input to the workpiece increases excessively
Solution Approach 1:
The heating process is segmented into two distinct phases: arc phase for workpiece heating and hotwire phase for filler material heating. This segmentation allows independent optimization of each heating function, enabling high metal deposition rates during hotwire phase without excessive workpiece heat input, since the arc is not continuously active.
Solution Approach 2:
The system uses periodic action by cycling between arc and hotwire phases. During hotwire phase, the filler material is heated intensively for rapid deposition, while the arc is extinguished to minimize workpiece heat input. This periodic switching resolves the contradiction between high deposition rate and controlled heat input.
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 solution enables efficient metal deposition with reduced heat input to the workpiece, allowing for faster and more consistent welding processes while minimizing equipment costs and complexity, facilitating both manual and automated applications.
Implementation Method 1
The power output in the hotwire phase heats the welding electrode without producing an arc
Implementation Method 2
The power output in the arc phase produces an arc between a welding electrode and a workpiece
Data Source
AI summary
A welding system includes a power supply configured to output power to a welding device. The power supply is configured to alternate the power output between an arc phase and a hotwire phase. The power output in the arc phase produces an arc between a welding electrode and a workpiece, and the power output in the hotwire phase heats the welding electrode without producing an arc.