Brazed Joint Surface Structure for Filler Ooze Control
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Solution Overview
Problem
In brazed joined components, the brazing filler material often oozes out from the joint surface due to thermal expansion and internal pressure, leading to residual material falling off and compromising the integrity of the product.
Innovation Solution
A joined component design featuring a guide groove with an open terminal end and a chamfer on the joint surfaces, where the brazing filler material is accommodated in a recess, allowing the groove to act as a passage for gases and the chamfer to accumulate excess filler material, reducing oozing and enhancing permeability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the brazing filler material is accommodated in a recess with a closed terminal end, then the residual material is contained, but the internal pressure rises and causes the material to ooze out from the fringe
Solution Approach 1:
The recess is segmented into multiple regions: an accommodating region for holding the brazing filler material and a guide groove region that directs excess material away from the joint surface fringe. This segmentation allows the system to both contain residual material and prevent oozing by providing a designated path for excess material flow.
Solution Approach 2:
The guide groove acts as an intermediary structure between the accommodating recess and the joint surface fringe. It serves as a mediator that captures and directs the brazing filler material that would otherwise ooze out, channeling it into a controlled path that prevents harmful accumulation at the fringe.
2Device complexity
If the terminal end of the guide groove is closed, then the structure is simple, but the brazing filler material cannot be effectively guided away from the fringe
Solution Approach 1:
Instead of closing the terminal end of the guide groove as conventionally done, the invention inverts this approach by leaving it open. This allows the brazing filler material to be naturally guided out of the groove and onto the chamfer, where it can be contained without requiring a closed terminal structure.
Solution Approach 2:
The chamfer is introduced as a localized structural feature at the joint surface fringe with specific geometric properties (inclined surface). This local quality change creates a favorable condition for containing the brazing filler material that exits the guide groove, without requiring modification of the entire groove structure.
3Ease of manufacture
If a through hole is used to arrange the brazing filler material, then the material can be easily inserted, but the residual material falls off and causes undesirable effects
Solution Approach 1:
The single through hole is segmented into a non-penetrating accommodating recess and a guide groove. This segmentation transforms the through hole into a controlled environment where residual material is captured in the recess and directed through the groove, preventing it from falling off and compromising product integrity.
Solution Approach 2:
The harmful function of the through hole (allowing residual material to fall off) is extracted and replaced by the guide groove structure. The guide groove takes out the material that would otherwise be harmful, directing it to a safe location on the chamfer where it cannot cause damage.
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
Effectively reduces the brazing filler material that oozes out from the joint surface, preventing residual material from falling off and improving the reliability and bonding strength of the joined component.
Implementation Method 1
the guide groove communicates to the chamfer... the guide groove can be utilized as a passage for the gas that is generated when the brazing filler material is melted
Implementation Method 2
the chamfer to accumulate excess filler material, reducing oozing
Implementation Method 3
allowing the groove to act as a passage for gases and the chamfer to accumulate excess filler material, reducing oozing and enhancing permeability
Data Source
AI summary
A joined component includes a first member provided with a first joint surface having an arranging part where a brazing filler material is arranged, a second member joined to the first member by brazing, and provided with a second joint surface having an accommodating recess that opposes the arranging part, a guide groove formed in the first joint surface or the second joint surface, and extending from the arranging part or the accommodating recess toward a fringe of the first joint surface or the second joint surface, and a chamfer formed along the fringe of the first joint surface or the second joint surface, and the guide groove communicates to the chamfer.