Multi-Feed 3D Deposition Head for Variable Melt Pool Shaping
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Solution Overview
Problem
Current additive manufacturing processes face challenges in achieving efficient production of complex shapes due to either requiring post-processing machining for near-net shape objects or being slow and costly for precise shape deposition, as they often rely on single types of feed materials and fixed melt pool sizes.
Innovation Solution
A deposition head system that includes multiple feed material feeders and an electromagnetic energy source to form a melt pool with structurally and compositionally different materials, allowing for flexible deposition and adjustable melt pool sizes to accommodate various structural features, enabling the simultaneous use of different materials and alloys for functionally graded transitions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a large melt pool deposition process is used, then the object can be quickly created with near net shape, but post process machining is required to achieve the final shape, increasing time and cost
Solution Approach 1:
The patent applies dynamics by making the melt pool size adjustable rather than fixed. The system can dynamically change the melt pool dimensions during the deposition process, allowing it to adapt between large melt pool mode for rapid near-net shape deposition and small melt pool mode for precise final shape achievement, thereby resolving the contradiction between productivity and manufacturing precision
Solution Approach 2:
The patent employs parameter changes by modifying the electromagnetic energy source parameters to control melt pool size. By adjusting energy parameters, the system can switch between large and small melt pool deposition modes, enabling both high-speed near-net shape fabrication and precise final shaping without requiring post-process machining, thus resolving the contradiction between deposition speed and shape precision
2Manufacturing precision
If a small melt pool deposition process is used, then precise deposition can be achieved to attain the final three-dimensional shape, but the process is slow and requires multiple passes, increasing time and cost
Solution Approach 1:
The system uses dynamics by enabling real-time adjustment of melt pool size. This allows the process to switch from small melt pool deposition for precise shaping to large melt pool deposition for rapid material accumulation, achieving both high precision and high speed without sacrificing either, thereby resolving the contradiction between manufacturing precision and productivity
Solution Approach 2:
The patent applies preliminary action by using large melt pool deposition to quickly create near-net shape objects first, then using small melt pool deposition to achieve the final precise shape. This staged approach performs roughing and finishing operations in sequence within the same additive manufacturing process, eliminating the need for separate post-process machining and resolving the contradiction between speed and precision
3Device complexity
If single type of feed material is used, then the process is simple, but it cannot accommodate structurally different and compositionally different materials for functionally graded transitions
Solution Approach 1:
The patent applies universality by designing a multi-functional feeder system that can handle multiple types of feed materials (powder, wire, rod) with different structures and compositions. The system is configured to selectively deposit different materials based on process requirements, enabling functionally graded transitions and multi-material additive manufacturing while maintaining operational simplicity, thus resolving the contradiction between device complexity and material versatility
Solution Approach 2:
The patent uses segmentation by dividing the feed material delivery system into separate feeders for different material types. This allows each feeder to be optimized for its specific material while the overall system coordinates their deposition, enabling complex multi-material builds without requiring a completely complex integrated feeding mechanism, thereby resolving the contradiction between device complexity and material adaptability
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 enhances the flexibility and efficiency of additive manufacturing by reducing waste, minimizing post-processing, and enabling the production of complex shapes with reduced fabrication time and cost, while allowing for the creation of multiple metal alloys and detailed structures within the same process.
Implementation Method 1
an electromagnetic energy source to direct electromagnetic energy to the growth surface, wherein the electromagnetic energy forms a melt pool on the growth surface
Data Source
AI summary
A method for additively manufacturing a three-dimensional article includes depositing feed materials through a material feeder to a growth surface. The feed materials include at least one of a first feed material, a second feed material and a third feed material. At least one of the first feed material, the second feed material and the third feed material is different. The method also includes exposing the feed materials to electromagnetic energy to form a melt pool. The melt pool includes at least one of a molten first feed material, a molten second feed material and a molten third feed material. The method further includes solidifying the melt pool.