Consolidating Head Semisolid Metal Consolidation
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Solution Overview
Problem
Current 3D printing technologies face limitations in achieving full density of metals, combining different metals, operating in multiple planes, maintaining high production speed, and efficiently producing large components with desired properties such as strength, heat resistance, and wear resistance, particularly for aerospace and industrial applications.
Innovation Solution
The Manufacturing By Consolidation (MBC) system employs a consolidating head that moves in a tamping direction, using a material dispensing assembly to form semisolid material streams which are then forge-welded in layers, allowing for the creation of components with metallurgical gradients and isotropic microstructures, enabling the use of various metals and preventing intermetallic embrittlement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional 3D printing methods are used to produce metal components, then layers can be accumulated to form three-dimensional shapes, but the components cannot achieve full density and combining different metals is not possible
Solution Approach 1:
The patent changes the fundamental parameter of material state from solid powder/laser-melted metal to semisolid consolidated material. The consolidating head processes material in a semisolid state, enabling dense consolidation without melting, and allowing multiple metal types to be combined by controlling the semisolid consistency and consolidation pressure.
Solution Approach 2:
The system enables the use of composite materials by allowing different metal powders to be consolidated in layers. The semisolid processing state facilitates the combination of dissimilar metals (e.g., steel and titanium) that cannot be merged using traditional melting methods, creating metallurgical gradients and isotropic microstructures.
2Productivity
If 3D printing processes are used for large components, then production speed decreases, but manufacturing capability for complex geometries is achieved
Solution Approach 1:
The patent replaces the traditional layer-by-layer deposition mechanism with a consolidating head that processes semisolid material in a more efficient manner. The mechanical consolidation process allows for faster production speeds while maintaining the ability to create complex geometries through controlled material consolidation and directional solidification.
3Strength
If material melting is used in 3D printing, then layers can be fused to form components, but full material strength and heat resistance are not achieved
Solution Approach 1:
The patent changes the processing temperature parameter from above-melting-point to below-melting-point semisolid state. The consolidating head operates in a temperature range that prevents complete melting, allowing material consolidation through controlled solid-state processes that preserve material strength and heat resistance properties.
Solution Approach 2:
The system utilizes phase transitions in the semisolid state rather than complete melting. The material is consolidated in a semisolid phase and then directionally solidified, creating fine-grained microstructures with enhanced strength and heat resistance without the defects associated with full melting and rapid solidification.
4Loss of substance
If conventional manufacturing methods are used, then production processes are simple, but waste from subtractive machining is high
Solution Approach 1:
The patent applies preliminary action by forming the complete three-dimensional component shape during the consolidation process itself, rather than creating a net and subtracting material. The consolidating head deposits and consolidates material in the final desired geometry, eliminating the need for subsequent subtractive machining and associated material waste.
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 components with enhanced strength, stiffness, and wear resistance, capable of operating in complex geometries and large scales, while avoiding melting and ensuring minimal waste, thus addressing the limitations of traditional 3D printing methods.
Implementation Method 1
form semisolid material streams which are then forge-welded in layers
Implementation Method 2
consolidating head that moves in a tamping direction
Implementation Method 3
form semisolid material streams
Implementation Method 4
creation of components with metallurgical gradients and isotropic microstructures
Data Source
AI summary
A manufacturing by consolidation system suitable for fabricating a component may include a consolidating head movable in a tamping direction. The consolidating head may include at least one support member. A lower head may be carried by the at least one support member. The lower head may have at least one tamper. At least one material dispensing assembly may be carried by the at least one support member. The at least one material dispensing assembly may be configured to contain or support a supply of at least one consolidating material. At least one material support guide may be carried by the lower head in material-receiving relationship to the consolidating roll unit. The at least one material support guide may have a guide discharge end forwardly of the tamper along the tamping direction. A platform positioning assembly may be disposed generally beneath the consolidating head. A working platform may be carried by the platform positioning assembly. In some embodiments, the platform positioning assembly may be configured to impart multi-positional capability to the working platform.