Additive Manufacturing Beam Control for Molten Pool Heat Retention
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Solution Overview
Problem
Existing additive manufacturing devices face challenges in finely adjusting the preheating and heat retention of substrates and molten pools, limiting the quality of the additive manufactured objects due to the inability to independently control and move heating heads relative to the powder material supply and irradiation devices.
Innovation Solution
An additive manufacturing device with a powder material supply system, a melting light beam irradiation device, and a heat retaining light beam irradiation device, where the heat retaining light beam irradiation device can independently change its posture and irradiation range relative to the melting light beam, allowing for precise preheating and heat retention control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the heating head moves integrally with the laminated head, then the device structure is simplified, but the ability to finely adjust preheating and heat retention is lost
Solution Approach 1:
The heating function is divided into two independent light beam irradiation devices: a melting light beam irradiation device and a heat retaining light beam irradiation device. These devices can be controlled independently to separately perform melting and heat retention functions, enabling fine adjustment of preheating and heat retention parameters while maintaining structural simplicity through functional segmentation.
Solution Approach 2:
The heat retaining light beam irradiation device is configured with independent positional adjustment capability relative to the melting light beam irradiation device. This dynamic positioning allows the irradiation ranges to be flexibly adjusted and overlapped to optimize preheating and heat retention effects during the additive manufacturing process.
2Ease of operation
If a single heating head is used, then the device is simpler to operate, but the quality of additive manufactured object deteriorates due to inability to retain heat
Solution Approach 1:
The heating function is segmented into two independent light beam irradiation devices: one for melting and one for heat retention. This segmentation allows each device to be optimized for its specific function while maintaining independent control, thereby improving manufacturing precision without significantly complicating operation.
Solution Approach 2:
The heat retaining light beam irradiation device continuously irradiates the molten pool and surrounding areas to maintain heat after the melting light beam passes. This continuous heat retention action prevents rapid cooling and ensures high-quality additive manufactured objects by maintaining appropriate temperatures throughout the manufacturing process.
3Device complexity
If the irradiation range of heat retaining light beam is fixed, then the device structure is simpler, but the adaptability to changing temperature conditions is reduced
Solution Approach 1:
The heat retaining light beam irradiation device is equipped with independent positional adjustment mechanisms that allow dynamic modification of its irradiation range relative to the melting light beam irradiation device. This enables the system to adapt to changing temperature conditions and material requirements during the additive manufacturing process.
Solution Approach 2:
The system allows independent adjustment of irradiation range parameters for the heat retaining light beam relative to the melting light beam. By changing these parameters dynamically, the system can optimize preheating and heat retention effects for different materials, layer thicknesses, and manufacturing conditions.
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
Enables the production of high-quality additive manufactured objects by allowing for flexible adjustment of preheating and heat retention based on changing substrate and powder material temperatures, preventing rapid cooling and cracking.
Implementation Method 1
a melting light beam irradiation device configured to radiate a melting light beam, the melting light beam heating the powder material supplied to the substrate to a temperature equal to or higher than a melting point of the powder material to melt the powder material
Implementation Method 2
a heat retaining light beam irradiation device configured to radiate a heat retaining light beam, the heat retaining light beam heating the powder material to a temperature lower than the melting point to retain the temperature in an outer side of a melting light irradiation range
Data Source
AI summary
There is provided an additive manufacturing device including a control device of controlling a relative posture of a heat retaining light beam irradiation device to a melting light beam irradiation device, in a state where a heat retaining light irradiation range of a heat retaining light beam larger than a melting light irradiation range of a melting light beam is overlapped with the melting light irradiation range, and such that a size of the heat retaining light irradiation range is changeable with respect to a size of the melting light irradiation range.