Gradient Material Control for Additive Manufacturing Timing
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Solution Overview
Problem
Existing additive manufacturing methods, such as laser metal deposition, struggle to accurately create multi-material and gradient-material structures due to material transportation delays between the feeder and deposition head, leading to incorrect material deposition and structural, aesthetic, and functional deficiencies.
Innovation Solution
Implementing a method that determines and accounts for material transition times in machine control codes, using Location and Material Process State (LAMPS) coding, to synchronize material changes with motion commands, ensuring precise material composition at the deposition site.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If material is transported from feeder to deposition head, then material deposition is enabled, but material transition delay occurs causing incorrect material composition
Solution Approach 1:
The system performs preliminary actions by pre-calculating material transition times and proactively adjusting material feed rates before the actual deposition occurs. The controller determines the time required for material to travel from feeder to deposition head and adjusts the material feed rate in advance to compensate for this delay, ensuring the correct material composition is achieved at the deposition site.
Solution Approach 2:
The system implements feedback by continuously monitoring the relationship between material feed rate changes and actual material deposition. The controller adjusts material feed rates based on determined transition times, creating a closed-loop control system that ensures accurate material composition despite transport delays.
2Adaptability or versatility
If material feed rate is changed to achieve gradient materials, then material composition varies, but deposition timing becomes inaccurate
Solution Approach 1:
The system calculates the material transition time in advance before changing material feed rates. By determining how long it takes for material to travel from the feeder to the deposition head, the system can proactively schedule feed rate changes to occur at the correct time, ensuring both material composition variability and deposition timing accuracy are maintained.
Solution Approach 2:
The system dynamically adjusts material feed rates based on real-time conditions and pre-calculated transition times. The controller modifies the material feed rate profile to account for the transport delay, enabling smooth transitions between different material compositions while maintaining precise deposition timing throughout the additive manufacturing process.
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 ensures accurate and timely material transitions, preventing errors in multi-material and gradient-material structures, thereby enhancing the quality and consistency of additive manufacturing outputs.
Implementation Method 1
a laser generates a molten bath on an existing surface
Implementation Method 2
The powder melts and bonds with the base material in the molten pool
Data Source
AI summary
Aspects of the present disclosure relate to. In one example, a method of controlling an additive manufacturing machine includes: determining a material transition between a first machine control code and a second machine control code in a set of machine control codes; determining a material transition time for the determined material transition between the first machine control code and the second machine control code; determining a motion time from the first machine control code and the second machine control code; comparing the material transition time to the motion time; and manipulating the set of machine control codes based on the comparison.