Dual Contact Tip Welding Torch Assembly for Stable Arc Starts
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Solution Overview
Problem
Current welding techniques lack a regime to ensure the electrode is heated prior to the initiation of a welding operation, affecting initial welding performance.
Innovation Solution
A welding assembly for a welding torch that includes a first contact tip for conducting welding current and a second contact tip for preheating the electrode, integrated with a cooling body to transfer heat and conduct currents, allowing for resistive preheating of the electrode wire.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a single contact tip is used to supply welding current, then the device complexity is low, but the electrode cannot be preheated before welding
Solution Approach 1:
The contact tip is divided into two separate contact tips: a first contact tip for supplying welding current and a second contact tip for supplying preheating current. This segmentation allows independent control of welding and preheating functions, enabling electrode preheating without compromising welding current delivery.
Solution Approach 2:
The welding torch assembly is designed to perform multiple functions through the dual contact tip configuration: it can supply both welding current and preheating current separately, making the system capable of both preheating and welding operations without requiring separate equipment.
2Reliability
If the electrode is preheated before welding, then the welding start performance is improved, but the energy consumption increases
Solution Approach 1:
The system performs preliminary preheating action on the electrode before the actual welding process begins. By using the second contact tip to supply preheating current that heats the electrode to an optimal temperature range, the welding arc can be initiated more reliably with reduced energy requirements during the welding phase.
Solution Approach 2:
The system changes the electrical parameters by providing separate preheating current through the second contact tip, which modifies the temperature parameter of the electrode before welding. This parameter change enables more efficient welding initiation by reducing the energy threshold required for arc formation.
3Temperature
If a cooling body is added to conduct current and transfer heat, then the thermal management is improved, but the device complexity increases
Solution Approach 1:
The cooling body is merged with the contact tip assembly, combining thermal management functionality with the electrical current conduction structure. This integration allows the cooling body to serve dual purposes: cooling the contact tips and conducting electrical current, thereby reducing the need for separate cooling systems.
Solution Approach 2:
The cooling body is designed to perform multiple functions: it conducts heat away from the contact tips to prevent overheating, conducts electrical current from the first contact tip to the wire, and provides structural support for the contact tip assembly, thereby reducing the need for additional components.
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 improved welding starts and increased deposition rates by ensuring the electrode is preheated before welding, reducing the risk of arc energy requirements and maintaining the same tool center point distance and torch neck angle as conventional torches.
Implementation Method 1
A welding assembly for a welding torch includes a first contact tip configured to conduct welding current to a consumable electrode and a second contact tip configured to conduct preheating current to the consumable electrode
Implementation Method 2
a cooling body configured to transfer heat from at least the first contact tip to coolant and to conduct the welding current
Data Source
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AI summary
The present application relates to a welding assembly for a welding torch (2009), which includes: a first contact tip configured to conduct welding current to a consumable electrode (114); a second contact tip configured to conduct preheating current to the consumable electrode (114); and a cooling body (202) configured to transfer heat from at least the first contact tip to cool and to conduct the welding current.