3D-Printed Curable Joint Structures for Complex Geometries
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Solution Overview
Problem
Existing adhesive joining methods for various materials, such as metals and composites, are labor-intensive and lack reproducibility, particularly when dealing with complex joint geometries like T-joints, requiring numerous fixtures and lengthy manual assembly steps.
Innovation Solution
The method involves 3D-printing a three-dimensional joint with a curable interface region that is partially cured and then positioned with a joinable member, where the interface region is fully cured to form a chemical or mechanical bond, eliminating the need for extensive manual assembly and fixtures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If traditional adhesive joining methods are used for complex joint geometries, then joining can be achieved, but the process becomes labor-intensive and requires numerous fixtures
Solution Approach 1:
The adhesive is pre-formed into a three-dimensional structural form with the exact geometry needed for the joint before the joining operation. This preliminary shaping eliminates the need for complex fixtures and manual positioning during assembly, as the adhesive structure itself provides the necessary geometric constraints and alignment features.
Solution Approach 2:
The patent replaces traditional mechanical joining systems (fixtures, clamps, alignment devices) with a chemically-formed adhesive structure that inherently provides mechanical support and alignment. The three-dimensionally structured adhesive acts as both the bonding agent and the structural element, eliminating the need for separate mechanical joining systems.
2Reliability
If manual assembly processes are used for adhesive joining, then flexibility is maintained, but reproducibility is limited
Solution Approach 1:
The adhesive structure is pre-formed with precise three-dimensional geometry and controlled curing characteristics before assembly. This preliminary preparation ensures that each adhesive component is identical and ready for automated placement, eliminating variability introduced by manual mixing and application processes.
Solution Approach 2:
The patent controls the curing parameters of the adhesive (such as cure rate, cure temperature, and cure timing) to ensure consistent and reproducible joining results. By precisely controlling these parameters during the curing process, the adhesive achieves reliable bond strength and properties across all joints, regardless of automation level.
3Productivity
If extensive manual assembly steps are used, then complex geometries can be accommodated, but manufacturing efficiency decreases
Solution Approach 1:
The adhesive is pre-formed into the final three-dimensional structural form before assembly, eliminating the need for time-consuming on-site shaping, positioning, and alignment operations. This preliminary preparation allows the adhesive to be quickly placed and cured, dramatically reducing assembly time and improving manufacturing efficiency.
Solution Approach 2:
The patent replaces time-intensive manual assembly operations with an automated curing process. The three-dimensionally structured adhesive requires only placement and curing, eliminating lengthy manual steps for shaping, positioning, and securing complex joint geometries.
4Strength
If traditional adhesive application is used, then joining is achieved, but joint strength and weight reduction are limited
Solution Approach 1:
The adhesive is formulated as a composite material that combines bonding functionality with structural support capabilities. This composite adhesive provides both strong chemical bonding and mechanical strength, allowing weight reduction compared to traditional metal fasteners or rigid joiners while maintaining or exceeding joint strength requirements.
Solution Approach 2:
The adhesive structure is designed with locally optimized properties: the three-dimensional form provides structural support where needed, while the chemical composition provides bonding strength at the interface. This local optimization allows the joint to achieve maximum strength with minimum weight by placing material only where it is functionally required.
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
This approach simplifies the joining process, increases manufacturing efficiency, reduces weight, and enhances the strength of the joint while allowing for complex geometries and customizable structures, making it suitable for applications in aerospace, automotive, and other industries.
Implementation Method 1
curing the interface region, while the interface region is in contact with the joinable member
Data Source
AI summary
Aspects of the present disclosure are directed to a three-dimensional joint and/or formation thereof, such as by 3D-printing the joint. The joint is provided with an interface region having a curable material in a curable state. The joint is positioned with the interface region in contact with a joinable member, and the interface region is cured to form a bond between the joint and the joinable member. Such an approach may, for example, involve forming a mechanical and/or chemical bond with the joint. Further, by utilizing such a joint (e.g., in a 3D-printed form), complex structural components can be formed from a curable material that can be partially cured with structures formed therein, and cured further to create the bond.