Liquid-Cooled Welding Torch for Resistive Wire Preheating
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Solution Overview
Problem
Current welding techniques lack a method to ensure the electrode is heated prior to the initiation of a welding operation, affecting the consistency and efficiency of the welding process.
Innovation Solution
A liquid-cooled welding torch with separate liquid cooling assemblies for welding and preheating currents, allowing for resistive preheating of the electrode wire before forming a welding arc, which includes a power and liquid transfer assembly for efficient heat management and current distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If separate liquid cooling assemblies are used for welding and preheating currents, then heat management and current distribution are improved, but device complexity increases
Solution Approach 1:
The cooling system is divided into separate liquid cooling assemblies - one dedicated to welding current management and another to preheating current management. This segmentation allows independent optimization of cooling parameters for each function, enabling effective electrode preheating without compromising welding current delivery, while the modular design helps manage the overall system complexity.
Solution Approach 2:
The liquid cooling assemblies serve multiple functions simultaneously - they cool the electrode during preheating, manage heat during welding operations, and provide a pathway for current distribution. This multi-functionality reduces the need for separate dedicated cooling systems for each operation, thereby managing device complexity while achieving effective temperature control.
2Reliability
If resistive preheating is applied to the electrode wire, then welding start consistency is improved, but energy consumption increases
Solution Approach 1:
The system applies resistive preheating to the electrode wire before the welding arc is initiated. This preliminary heating action brings the electrode to an optimal temperature range that facilitates more consistent arc ignition and welding start, reducing the energy required during the actual welding process and improving overall efficiency.
Solution Approach 2:
The system dynamically controls the preheating parameters (current magnitude, duration, and timing) based on welding conditions. By adjusting these parameters, the system achieves reliable welding starts while minimizing excessive energy consumption, optimizing the balance between reliability and energy use.
3Productivity
If the electrode is preheated before welding, then deposition rate is improved, but system complexity increases
Solution Approach 1:
The preheating function is merged with the existing welding torch and power supply system. The liquid cooling assemblies that are already part of the welding system are utilized to manage heat during preheating, and the preheating current is delivered through the same contact tips and wire feed mechanism. This merging approach enables improved deposition rates without requiring entirely separate preheating equipment, thereby limiting the increase in system 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
The solution enables consistent and efficient welding by ensuring the electrode is preheated, improving welding starts and deposition rates without the need for significant reprogramming of robotic systems.
Implementation Method 1
allowing for resistive preheating of the electrode wire before forming a welding arc
Data Source
AI summary
Systems, methods, and apparatus to preheat weld wire are disclosed. An example welding torch includes a first contact tip configured to conduct welding current to a consumable electrode, a second contact tip configured to conduct preheating current to the consumable electrode, and a plurality of liquid cooling assemblies configured to conduct the preheating current and to conduct the welding current to the consumable electrode.