Composite Joining Component Annular Contour for Adhesive Integrity
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Solution Overview
Problem
Adhesives used in composite joining components are sensitive to thermal stresses and mechanical loads during transportation, leading to bond failure before reaching the final joining position, especially when handled in bulk or automated feeding.
Innovation Solution
A composite joining component with an annular contour surface on its application section, which aligns transversely to the joining surface, is designed to apply adhesive around this surface, exploiting differential thermal expansion to enhance adhesion and prevent cracking, allowing for improved handling and automated feeding without adhesive detachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If adhesive is applied to the joining surface for transportation, then the composite joining component can be transported and handled in bulk, but the adhesive is sensitive to thermal stresses and mechanical loads leading to bond failure
Solution Approach 1:
The annular contour surface is formed on the joining component before adhesive application. This preliminary structural feature creates a geometry that accommodates adhesive shrinkage during cooling, preventing bond failure while enabling bulk handling and transportation of the composite joining component.
Solution Approach 2:
The invention exploits differential thermal expansion between the adhesive and the joining component. The annular contour surface allows the adhesive to shrink radially inward during cooling without creating harmful stresses, as the contour geometry accommodates this dimensional change and maintains bond integrity throughout the temperature cycle.
2Productivity
If adhesive is applied hot and then cooled for transportation, then the composite joining component can be fed automatically, but cracking occurs during cooling due to thermal stress
Solution Approach 1:
The annular contour surface is specifically designed to accommodate the thermal shrinkage of the adhesive during cooling. As the adhesive contracts, the radial inward movement is guided by the contour geometry, preventing crack formation and maintaining the integrity of the adhesive layer while allowing automated feeding processes.
Solution Approach 2:
The invention changes the geometric parameters of the joining surface by introducing an annular contour. This geometric modification alters the stress distribution during cooling, transforming the thermal shrinkage from a harmful effect into a controlled dimensional change that maintains adhesive integrity.
3Productivity
If the joining component is handled in bulk, then productivity increases, but mechanical loads cause adhesive detachment
Solution Approach 1:
The annular contour surface is pre-formed on the joining component before adhesive application and bulk handling. This preliminary geometric feature creates a stress-distributing structure that prevents adhesive detachment during subsequent mechanical handling, enabling reliable bulk processing while maintaining adhesive retention.
Solution Approach 2:
The contour surface geometry is designed to work with thermal expansion and shrinkage characteristics of the adhesive. During cooling and subsequent handling, the radial inward shrinkage of the adhesive is accommodated by the contour, preventing detachment and enabling robust bulk handling operations.
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 annular contour surface improves adhesion by reducing cracking and enhancing cohesive strength, making the composite joining components suitable for bulk handling and automated feeding without adhesive loss, ensuring reliable bonding during the final assembly process.
Implementation Method 1
exploiting differential thermal expansion to enhance adhesion and prevent cracking
Data Source
Figure 1~2
Figure 3~5
AI summary
Joining component (12) having a joining axis (13), having a joining surface (20), which extends transversely to the joining axis (13), and having an anchor section (18), wherein an application section (22) for the application of an adhesive is formed on the joining surface (20), and wherein an annular contour surface (26; 36; 44) is formed on the application section (22), said contour surface being aligned transversely to the joining surface (20) and being arranged radially within an outer circumference (23) of the application section (22).