Welding Stud Projections for Uniform Joining Across Sheet Thicknesses
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Solution Overview
Problem
Existing welding elements and methods struggle to provide a consistent and strong connection across varying sheet thicknesses, particularly in vehicle body construction, where aluminum alloys and high-strength sheets with different thicknesses require flexible and cost-effective solutions that minimize the risk of through-welding.
Innovation Solution
A welding stud with a head featuring a welding surface covered by evenly and uniformly distributed pointed projections, allowing for adaptable welding characteristics across thin and thick sheets, and a welding method that adjusts energy distribution to prevent through-welding, using projections that can be produced by cold-forming and arranged in a waffle-like pattern for effective melting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional welding elements with flat or non-uniform projections are used, then the welding process is simple, but the welding is not even and uniform across varying sheet thicknesses
Solution Approach 1:
The welding element applies local quality by creating pointed projections with specific geometric characteristics (sharp tips, controlled base diameters) that are evenly distributed across the welding surface. This local structural modification ensures uniform energy distribution and even welding across different sheet thicknesses, directly resolving the contradiction between welding uniformity and structural complexity.
Solution Approach 2:
The invention changes the geometric parameters of the welding surface by forming pointed projections with specific height, base diameter, and distribution patterns. These parameter modifications enable the welding element to adapt to varying sheet thicknesses while maintaining uniform welding quality, addressing the contradiction between manufacturing precision and device complexity.
2Manufacturing precision
If welding elements are designed for specific sheet thicknesses, then welding precision is improved, but adaptability to different sheet thicknesses decreases
Solution Approach 1:
The welding element achieves universality through its pointed projection structure that can effectively weld across a range of sheet thicknesses. The specific geometric design of the projections allows the same welding element to adapt to different material conditions, providing both consistent welding quality and broad adaptability without requiring multiple specialized elements.
Solution Approach 2:
The invention introduces dynamics by making the welding element's energy distribution adaptable to varying sheet thicknesses. The pointed projections dynamically adjust the energy flow during welding, allowing the element to maintain optimal performance across different thickness conditions, thus resolving the contradiction between precision and versatility.
3Strength
If high energy is used to weld thick sheets, then welding strength is improved, but through-welding of thin sheets occurs
Solution Approach 1:
The pointed projections create localized energy concentration points that deliver high energy density exactly where needed at the welding interface. This local quality approach ensures strong welding connections while preventing excessive energy penetration that would cause through-welding damage, effectively resolving the contradiction between welding strength and harmful effects.
Solution Approach 2:
The pointed projections act as intermediaries between the welding energy source and the workpiece. They control and modulate the energy transfer, allowing high energy input for strong welding while preventing uncontrolled energy penetration that would damage thin sheets, thus resolving the contradiction between strength and harmful factors.
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 a strong, consistent, and flexible welding connection that adapts to different sheet thicknesses, reducing the risk of through-welding and ensuring even energy distribution for stable arc burning, thus improving the reliability and efficiency of the welding process.
Implementation Method 1
The arc stud welding method is one of the arc pressure welding methods and is used to permanently connect an element such as a welding stud
Implementation Method 2
When connecting the welding element or welding stud to the workpiece surface, it has to be ensured that the melting and thus also the welding is even
Data Source
AI summary
A welding element is operable for being connected to a workpiece using a welding method. The welding element comprises: a head and a shaft like anchor portion. The head includes a welding surface, a stop surface that is remote from the welding surface, and a plurality of pointed projections evenly and uniformly distributed over the entire welding surface. The shaft-like anchor portion extends along a longitudinal axis between a first end region and a second end region, with the first end region connected to the stop surface.