Hollow Welding Torch Electrode for High-Load Anode Cooling
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Solution Overview
Problem
In arc welding processes, the tungsten electrode experiences a significantly higher thermal load when acting as an anode, which requires improved cooling to prevent damage.
Innovation Solution
The electrode is designed as a hollow body with a base made of high thermal conductivity materials like copper and a tungsten tip, featuring a unique internal geometry with varying diameters and a thread for efficient cooling medium flow, allowing for effective heat dissipation and mechanical stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If the tungsten electrode is used as an anode to dissolve oxide layers on the workpiece, then the oxide removal capability is improved, but the thermal load on the electrode increases significantly
Solution Approach 1:
The electrode is divided into functionally distinct segments: a copper base body for cooling and electrical conduction, and a tungsten tip for arc generation and oxide dissolution. This segmentation allows each material to perform its optimal function while mitigating the thermal load problem on the tungsten portion.
Solution Approach 2:
A copper base body acts as an intermediary between the cooling medium and the tungsten tip. The copper conducts heat away from the tungsten tip efficiently while providing a pathway for cooling water flow, thereby reducing the thermal load on the tungsten electrode during anode operation.
2Temperature
If the base body is made as a hollow structure with internal cooling channels, then the cooling efficiency is improved, but the device complexity increases
Solution Approach 1:
The internal diameter of the hollow base body varies along its length, creating different flow cross-sections that optimize cooling medium velocity and heat dissipation at different locations. This parameter change achieves superior cooling efficiency while maintaining a relatively simple monolithic structure.
3Reliability
If the tip is made of different material than the base body, then the performance at the electrode tip is improved, but the manufacturing complexity increases
Solution Approach 1:
The electrode employs a composite structure combining copper base body and tungsten tip, leveraging the high thermal and electrical conductivity of copper for cooling and the high melting point and electron emission properties of tungsten for arc generation. This composite design optimizes overall electrode performance despite the added manufacturing 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
This design significantly reduces the thermal load on the electrode, ensuring prolonged performance and stability by facilitating efficient heat dissipation and improved mechanical stability during welding or cutting operations.
Implementation Method 1
The base body is designed as a hollow body that is open on at least one side and has an opening on a side opposite the tip for introducing a cooling medium into an interior space of the base body
Implementation Method 2
The base body itself can be made of copper or another metal in order to utilize the correspondingly high thermal and electrical conductivity of this material
Implementation Method 3
The tip is preferably made of tungsten, but can also be made of tungsten doped to increase electron emission at an anode
Data Source
Figure 1~2
Figure 3~4
Figure 5
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).