Welded Panel Junction Structure for Intersecting Laser Brazed Seams
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Solution Overview
Problem
Laser brazing welding of thin panels faces challenges in securing rigidity and preventing deformation and pinhole formation due to thermal stress and spring back, especially when welding lines intersect, making it difficult to achieve desired product designs without welding defects.
Innovation Solution
A method and component design that includes forming rigidity-reinforcing parts on panels where preceding and following welds intersect, using laser welding, and strategically positioning these parts to enhance panel rigidity and prevent deformation, with the option to fill pinholes with sealer in recessed grooves for improved coating quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If thin panels are used for laser brazing welding, then welding quality and exterior design are improved, but panel rigidity is insufficient and deformation occurs
Solution Approach 1:
A rigidity-reinforcing part is formed on the panel at a position adjacent to where preceding and following welds intersect before the welding process. This preliminary reinforcement prevents deformation and maintains panel rigidity during the welding operation, allowing thin panels to be used while avoiding welding defects caused by insufficient rigidity.
2Adaptability or versatility
If welding lines are intersected to achieve desired product design, then design flexibility is improved, but thermal stress becomes excessive and pinholes are generated
Solution Approach 1:
The rigidity-reinforcing part is formed in advance at the intersection area of welding lines before welding begins. This preliminary reinforcement strengthens the panel at the critical intersection point, enabling the panel to withstand the thermal stress generated when multiple welding lines intersect, thereby preventing pinhole formation while maintaining design flexibility.
3Manufacturing precision
If welding lines are avoided from overlapping to prevent defects, then welding quality is improved, but product design realization becomes difficult
Solution Approach 1:
Instead of avoiding overlapping welding lines, the invention forms a rigidity-reinforcing part at the intersection area before welding. This allows welding lines to overlap as needed for product design while the preliminary reinforcement prevents the harmful effects of overlapping, thus achieving both design flexibility and welding quality.
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 effectively prevents welding defects and deformation by enhancing panel rigidity and allowing for smooth painting surfaces, even when welding lines intersect, thereby ensuring the quality of the welding and painting processes.
Implementation Method 1
laser brazing welding
Implementation Method 2
thermal stress becomes excessive
Implementation Method 3
laser brazing welding
Data Source
AI summary
A component includes a first part in which a first junction part is configured, a second part in which a second junction part and a cross junction part intersecting the second junction part are configured. The second junction part and the first junction part are welded at a preceding weld. The component also includes a third part in which a third junction part is configured. A part of the third junction part is overlapped with an opposite part of the first junction part, a remaining part of the third junction part is overlapped with the cross junction part, and the first part and the second part are welded to the third part at a following weld at each of the overlapped parts.