Laminated Metal Foil 3D Forming by Selective Etching
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current methods for manufacturing 3D metallic objects are either energy-intensive, wasteful, or limited in accuracy and geometrical complexity, with high costs associated with increasing accuracy, necessitating a more efficient and precise method for producing dense, complex metallic parts.
Innovation Solution
A method involving the use of thin metal foils marked with a material of higher electrochemical potential, bonded under pressure and heat, and selectively etched to create laminated 3D metallic objects with minimal waste and energy consumption, utilizing a system that includes stacking, marking, bonding, and etching units to achieve high accuracy and density.
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 processed, allowing for precise control of the final geometry while reducing the energy required compared to traditional casting of the entire object at once.
Solution Approach 2:
The foils are pre-marked with marking agent in the desired pattern before bonding. This preliminary marking allows the etching process to selectively remove material only where needed after bonding, achieving high precision without requiring high-energy machining operations on the final object.
2Manufacturing precision
If machining is used to manufacture 3D metallic objects, then accurate shapes can be produced, but material waste is high and geometrical complexity is limited
Solution Approach 1:
The object is constructed from multiple thin foil layers that are stacked to form the complete 3D shape. This eliminates the need for subtractive machining and associated material waste, as the final geometry is built directly from the stacked and selectively etched foils.
Solution Approach 2:
The manufacturing process transitions from 3D subtractive machining to a layered 2D stacking approach followed by selective etching. By working in the layered dimension and using selective etching on bonded foils, complex geometries are achieved without material removal waste.
3Manufacturing precision
If sintering is used to manufacture 3D metallic objects, then powder can be consolidated, but achieving full density requires hot isostatic pressure which increases energy consumption and cost
Solution Approach 1:
The foils are pre-bonded together using diffusion bonding or transient liquid phase bonding before any density-enhancing treatments. This preliminary bonding creates a densely packed structure that eliminates the need for subsequent hot isostatic pressing, achieving full density without the high energy consumption associated with HIP treatment.
Solution Approach 2:
The bonding process uses controlled temperature and pressure parameters to achieve diffusion bonding or transient liquid phase bonding between foils. By optimizing these parameters, full density is achieved during the bonding process itself, eliminating the need for additional high-energy density treatments.
4Manufacturing precision
If higher accuracy is required in manufacturing, then the cost increases significantly across all known methods
Solution Approach 1:
The marking agent is applied to the foils before bonding, creating a permanent mask that protects specific areas during etching. This preliminary marking allows for high-precision selective material removal after bonding, achieving complex geometries and high accuracy without requiring expensive post-bonding machining or correction operations.
Solution Approach 2:
The process replaces expensive high-precision machining operations with a chemical etching process guided by pre-applied marking agent. The selective etching using marking agent provides a cost-effective method for achieving high manufacturing accuracy and complex geometries that would be prohibitively expensive using traditional mechanical machining.
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 production of highly accurate, dense 3D metallic objects with reduced waste and energy consumption, minimizing pre- and post-processing stages while allowing for complex geometries, thus overcoming the limitations of existing methods.
Implementation Method 1
marking portions of some of the foils in the plurality of foils with a marking agent that may include a material having electrochemical potential higher than the metal
Implementation Method 2
the bonding may include thermal diffusion bonding
Implementation Method 3
the bonding may include forming transient liquid phase diffusion bonding between the metal in the foils and a component in the marking agent
Implementation Method 4
selectively etching parts of the bonded block that are not marked by the marking agent
Data Source
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.