Welding Stud Surface Projections for Variable Sheet Thickness
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Solution Overview
Problem
Existing welding elements are not suitable for varying sheet thicknesses of aluminum alloys, leading to inconsistent welding strength and risk of penetration welding, particularly in car body construction where uniform and strong connections are required.
Innovation Solution
A welding stud with a welding surface featuring regularly distributed pointed projections, arranged in parallel rows and separated by grooves, which allows for adaptable welding characteristics across thin and thick sheet metal thicknesses, preventing penetration welding and ensuring strong connections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional welding elements with flat welding surfaces are used, then welding is simple and cost-effective, but welding strength becomes inconsistent and penetration welding occurs with varying sheet thicknesses
Solution Approach 1:
The welding surface is equipped with multiple pointed projections distributed across its area, creating localized high-strength contact points. Each projection concentrates welding energy at its tip, ensuring consistent penetration depth and weld strength regardless of the overall sheet thickness variation. This local quality enhancement allows the welding element to adapt to different thicknesses while maintaining uniform weld characteristics.
2Adaptability or versatility
If welding elements are designed for specific sheet thicknesses, then welding strength is optimized, but flexibility to handle different thicknesses is lost
Solution Approach 1:
The welding surface is segmented into multiple discrete projection elements rather than a continuous flat surface. Each projection acts as an independent welding contact point with standardized geometry, ensuring consistent welding characteristics across all projections. This segmentation allows the welding element to handle varying sheet thicknesses uniformly, as each projection independently adapts to the local thickness while maintaining the same welding parameters.
3Adaptability or versatility
If pointed projections are added to the welding surface, then adaptability to varying thicknesses improves, but device complexity increases
Solution Approach 1:
The projections feature rounded tips rather than sharp points, and the overall welding surface may include a bulge with curved geometry. This curvature design simplifies the manufacturing process compared to precise sharp-point formation, while still achieving the desired energy concentration effect. The rounded geometry is more tolerant of manufacturing variations and simplifies the forming process, reducing device complexity while maintaining adaptability to varying sheet thicknesses.
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 welding stud achieves a consistent and strong connection by distributing welding energy evenly, preventing uncontrolled arc migration and ensuring stable arc burning, thus enhancing the strength of the welded joint across different sheet thicknesses.
Implementation Method 1
The welding element is suitable for being connected to a workpiece using a welding process... arc stud welding process belongs to the arc pressure welding processes
Implementation Method 2
When connecting the welding element or welding stud to the workpiece surface, it is important to ensure that uniform melting and thus uniform welding takes place
Data Source
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AI summary
A welding element (10) which is suitable for being connected to a workpiece using a welding process, comprising: - a head (14) 14 with a welding surface (22) and a holding surface (24) remote from the welding surface (22), - a shank-shaped anchor portion (12) extending between a first end portion (18) and a second end portion (20) along a longitudinal axis (Xa), the first end portion (18) being connected to the support surface (24), characterized in that that the welding surface (22) has a plurality of regularly distributed pointed projections (26).