Hollow Welding Torch Electrode With Internal Cooling Geometry
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In arc welding methods, the thermal loading of tungsten electrodes is excessively high when used as an anode, necessitating improved cooling solutions to prevent damage.
Innovation Solution
A hollow electrode design with a main body and tip, featuring internal regions with varying diameters for efficient cooling medium flow and a material composition that includes copper for high thermal conductivity and tungsten for electron emission, along with dopings to enhance performance, ensures effective heat dissipation and mechanical stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If tungsten electrode is used as anode in arc welding, then oxide layer on workpiece can be dissolved, but thermal loading of electrode becomes considerably higher
Solution Approach 1:
The electrode is divided into functionally distinct segments: a copper-based main body for heat dissipation and a tungsten tip for electron emission and arc stability. This segmentation allows each material to perform its optimal function while mitigating the thermal loading problem through the copper's superior thermal conductivity.
Solution Approach 2:
The electrode employs a composite structure combining copper (or copper alloy) with tungsten. The copper matrix provides high thermal conductivity to reduce thermal loading, while embedded tungsten particles or a tungsten tip maintain electron emission capabilities and arc stability, resolving the contradiction between thermal management and welding performance.
2Temperature
If hollow body design with varying internal diameters is implemented, then cooling efficiency is improved, but device complexity increases
Solution Approach 1:
The internal diameter of the hollow body varies along its length, creating regions of different cooling intensity. The narrower sections increase cooling medium velocity and heat exchange efficiency where thermal loading is highest, while wider sections provide structural support and accommodate manufacturing constraints, optimizing cooling without uniform complexity throughout.
Solution Approach 2:
The internal diameter parameter of the hollow body is changed progressively along its length rather than remaining constant. This parameter variation optimizes the balance between cooling efficiency and structural integrity, allowing the electrode to dissipate heat more effectively while maintaining manufacturability and mechanical strength.
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 design significantly reduces thermal loading on the electrode, facilitating efficient heat dissipation and maintaining mechanical stability, thus extending the electrode's lifespan and improving welding performance.
Implementation Method 1
a cooling medium, typically water, or else some other fluid, can be introduced into the cooling body through the opening. By means of the design of the interior space with at least three regions, wherein a diameter narrows starting from the diameter of the opening in the direction of the terminating surface and the tip, an expedient flow geometry is created in which the flow of cooling medium is incident at an adequately high speed and can correspondingly dissipate heat
Implementation Method 2
The main body itself may be formed from copper or from some other metal in order to utilize the correspondingly high thermal and electrical conductivity of this material
Implementation Method 3
The tip is preferably formed from tungsten, but may also be formed from tungsten with a doping in order to increase an emission of electrons at an anode
Data Source
AI summary
The invention relates to an electrode (16) for a welding torch (17) or a cutting torch, comprising a main body (1) and a tip (3) arranged on an end surface (2) of the main body (1). The main body (1) is designed as a hollow body that is open on at least one side. On a side opposite one of the tips (3), the main body has an opening (4) for introducing a cooling medium into an interior space (7) of the main body (1), and at least two regions (5, 6) in the interior space (7), the two inner diameters of which are different from one another, and a transition region (8) located between the two regions (5, 6) having an inner diameter that decreases in the direction of the tip (3).