Brazed Sheet Assembly Venting for Uniform Bond Formation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In brazing processes, heat, gas, and vapor often get trapped between outer sheets and interior components, leading to incomplete brazing and weaker bonds, especially as the assembly size increases, due to inadequate venting, resulting in non-uniform bonding and material property issues.
Innovation Solution
Incorporating venting features such as holes and slots into the outer sheets to channel heat, gas, and vapor out of the assembly or direct them to specific areas, ensuring complete and uniform brazing by facilitating faster cooling and controlled brazing processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the assembly size increases, then the bonding area increases, but heat and vapor venting becomes inadequate leading to incomplete brazing
Solution Approach 1:
The patent divides the bonding interface into multiple segments by incorporating through-holes and slots in the outer sheets. This segmentation creates multiple venting pathways throughout the bonding area, allowing heat and vapor to escape efficiently even as the overall assembly size increases, thereby maintaining complete brazing across the entire bonding area.
Solution Approach 2:
The through-holes and slots act as intermediary channels that facilitate the removal of heat and vapor from the bonding interface. These features serve as mediators between the bonding area and the external environment, enabling adequate venting in large assemblies by providing dedicated pathways for thermal and gaseous transport.
2Reliability
If venting features are added to outer sheets, then heat and vapor are channeled effectively, but the sheet structure becomes more complex
Solution Approach 1:
The patent employs a porous-like structure in the outer sheets by incorporating multiple through-holes and slots. This approach achieves effective heat and vapor channeling throughout the bonding area while maintaining a relatively simple sheet structure. The distributed pattern of holes and slots provides uniform venting without requiring complex three-dimensional features or additional components.
3Manufacturing precision
If filler metal is applied to entire surface, then complete coverage is achieved, but material cost and processing time increase
Solution Approach 1:
The patent applies filler metal selectively to specific regions rather than the entire surface. The venting features (through-holes and slots) create localized areas where filler metal is deposited, concentrating the brazing action at critical bonding zones. This local quality approach ensures complete coverage where needed while reducing overall material consumption and processing time.
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 implementation of venting features ensures complete and uniform brazing across the assembly, enhancing bond strength and material properties by effectively managing heat and vapor during the brazing process, thereby addressing the issues of incomplete bonding and material property inconsistencies.
Implementation Method 1
Brazing is a process by which two or more metal components are joined together by melting and flowing a filler metal into the interface. The filler metal has a lower melting point than the metal components being joined.
Implementation Method 2
The one or more venting features include holes or slots to channel heat, gas, or vapor during a brazing process
Data Source
AI summary
Systems and methods to control fabrication of an assembly involve a first end sheet having an interior surface and an exterior surface, opposite the interior surface. A system includes interior sheets, the interior sheets including a first interior sheet at one end of a stack of the interior sheets and including a last interior sheet at an opposite end of the stack of the two or more interior sheets, the first interior sheet being adjacent to the interior surface of the first end sheet, and a second end sheet having an interior surface and an exterior surface, opposite the interior surface. The last interior sheet is adjacent to the interior surface of the last end sheet, and the interior surface of the first end sheet or the second end sheet includes venting features, the venting features including holes or slots to channel heat, gas, or vapor during a brazing process.