Laminated Metal Foil 3D Forming by Selective Electrochemical Etching
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Solution Overview
Problem
Current methods for manufacturing 3D metallic objects are limited by high energy consumption, material wastage, and the need for extensive pre- and post-processing stages, which hinder the production of highly accurate and dense objects.
Innovation Solution
A method involving the use of foils marked with a material having a higher electrochemical potential than the metal, which are bonded together using pressure and heat, and selectively etched to form a laminated 3D metallic object, minimizing waste and energy consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If casting is used to manufacture 3D metallic objects, then dense objects with unlimited composition can be produced, but energy consumption is high and manufacturing accuracy is limited
Solution Approach 1:
The object is divided into multiple thin foil layers that are stacked and bonded together. Each layer can be independently marked and etched, allowing precise control over the final 3D structure while reducing the energy required for each individual layer compared to traditional casting of the entire object
Solution Approach 2:
The manufacturing process transitions from volumetric casting to a laminated approach where the object is built by stacking two-dimensional foils in the third dimension. This allows for precise control of complex geometries through layer-by-layer construction with reduced energy consumption
2Manufacturing precision
If machining is used to manufacture 3D metallic objects, then accurate objects can be produced, but material wastage is high
Solution Approach 1:
The desired 3D geometry is pre-defined by marking specific patterns on the foils before bonding. The marking agent is applied in advance to indicate areas that will be etched away, eliminating the need for post-manufacturing machining and reducing material waste
Solution Approach 2:
Instead of removing material through machining, the process extracts only the specific portions marked by the marking agent through selective etching. This leaves the majority of the material intact and achieves the desired geometry with minimal material removal
3Manufacturing precision
If sintering is used to manufacture 3D metallic objects, then manufacturing process can be simplified, but achieving high density is almost impossible without additional HIP treatment
Solution Approach 1:
The object is constructed from multiple thin foil layers that are bonded together with controlled density. Each layer maintains its structural integrity while contributing to the overall density of the final object, achieving high density without requiring HIP treatment
Solution Approach 2:
The process creates a composite structure where metal foils are bonded together with marking agent layers in between. This composite approach achieves high density and structural integrity through the layered construction rather than requiring additional densification treatments
4Manufacturing precision
If higher accuracy is required in manufacturing, then manufacturing precision improves, but manufacturing cost increases
Solution Approach 1:
The marking agent automatically defines the geometry that needs to be created through selective etching. The process is self-guiding where the marked areas indicate exactly what should be removed, eliminating the need for expensive post-processing machining operations and reducing manufacturing costs while maintaining high accuracy
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 enables the creation of highly accurate and dense 3D metallic objects with reduced material waste and energy usage, while minimizing pre- and post-processing stages, improving manufacturing efficiency.
Implementation Method 1
marking portions of some of the foils in the plurality of foils with a marking agent that includes a material having electrochemical potential higher than the metal
Implementation Method 2
bonding the plurality of marked foils into a block
Implementation Method 3
the bonding includes forming transient liquid phase diffusion bonding between the metal in the foils and a component in the marking agent
Data Source
Figure 1A
Figure 1B~1C
Figure 1D~1E
AI summary
System and method of manufacturing a laminated three-dimensional (3D) metallic object. The method includes: providing a plurality of foils of metal; marking portions of some of the foils in the plurality of foils with a marking agent that includes a material having electrochemical potential higher than the metal; bonding the plurality of marked foils into a block; and selectively etching parts of the block not in proximity to the marking agent.