Arc Welding Ground Electrode Layout for Narrow-Space Joints
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Solution Overview
Problem
Existing arc welding devices struggle to ensure high-quality welding of base materials with different plate thicknesses and shapes in a small work space, leading to potential interference with peripheral components and difficulties in maintaining necessary welding quality.
Innovation Solution
The arc welding device employs a configuration with a welding electrode positioned between the bent parts of the base materials, and independently contacting first and second ground electrodes that extend along the bent parts and are in contact with the flat parts of the base materials, allowing for adjustable pressing loads to ensure proper grounding and welding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the power converter is downsized and reduced in height, then the compactness is improved, but the work space for welding is narrowed causing interference with peripheral components
Solution Approach 1:
The ground electrode is divided into multiple independent grounding points (first ground electrode contacting the terminal, second ground electrode contacting the bus bar) instead of using a single grounding mechanism. This segmentation allows each grounding point to be independently positioned and adjusted, enabling effective grounding in the narrowed work space without interfering with peripheral components.
2Device complexity
If a single ground electrode is used, then the device complexity is reduced, but the ability to ground different base materials with different plate thicknesses and shapes is insufficient
Solution Approach 1:
Different ground electrodes are used for different base materials (terminal and bus bar) based on their specific characteristics. The first ground electrode is configured to contact the terminal while the second ground electrode contacts the bus bar, allowing each grounding point to be optimized for its specific base material's plate thickness, shape, and position, thereby ensuring effective grounding for dissimilar materials.
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 configuration enables high-quality welding of base materials with varying thicknesses and shapes in a small work space by ensuring stable arc discharge and proper grounding, thus preventing welding quality deterioration.
Implementation Method 1
a welding electrode 11 disposed to face a contact part between the bent part 82 of the first base material 80 and the bent part 92 of the second base material 90
Implementation Method 2
a first ground electrode 20 extending along the bent part 82 of the first base material 80 to contact the flat part 81 of the first base material 80, and a second ground electrode 30 extending along the bent part 92 of the second base material 90 to contact the flat part 91 of the second base material 90
Data Source
AI summary
Provided is an arc welding device capable of welding base materials different in plate thickness, shape, or the like from each other with high quality in a narrow work space. An arc welding device 1 welds a first base material 80 and a second base material 90 that respectively include flat parts 81 and 91, and bent parts 82 and 92, the flat parts 81 and 91 extending in a direction of approaching each other, and the bent parts 82 and 92 being bent from the flat parts 81 and 91 and extending in an intersecting direction of the flat parts 81 and 91 to be in contact with each other, the arc welding device including: a welding electrode 11; a first ground electrode 20 extending along the bent part 82 of the first base material 80 to be in contact with the flat part 81 of the first base material 80; and a second ground electrode 30 extending along the bent part 92 of the second base material 90 to be in contact with the flat part 91 of the second base material 90, the first ground electrode 20 and the second ground electrode 30 being respectively in contact with the flat part 81 of the first base material 80 and the flat part 91 of the second base material 90 independently of each other.