Methods and apparatus for improved thermal monitoring by correlating infrared emissivity to surface topography
| DWPI Title: Thermal monitoring method for metal additive manufacturing system, involves generating temperature based on detected infrared radiation and emissivity value, and applying detected temperature to temperature utilization component |
| Abstract: Embodiments of the present disclosure provide an improved method and apparatus for thermal monitoring for a metal additive manufacturing system. An emissivity value of a top surface of an object to be manufactured is determined based, at least in part, on an arithmetic product of a predetermined roughness value and a predetermined slope-related value. The predetermined roughness value and slope-related values are predetermined based, at least in part, on measurements of a previously manufactured object. The system sinters a metal to form the top surface of the object to be manufactured. An infrared sensor detects radiation from at least a portion of the top surface of the object to be manufactured. A temperature is generated based, at least in part, on the detected infrared radiation and the emissivity value and the generated temperature is applied to a temperature utilization component of the system. |
| Use: Method for perfoming thermal monitoring for a metal additive manufacturing system. |
| Advantage: The accurate thermal monitoring of the metal material during the manufacturing process is ensured to assure proper quality and the desired structure. The accuracy of the thermal monitoring is improved. The quality of the object to be manufactured is monitored based on the received temperature, and the additive manufacturing system in manufacturing the object is controlled. |
| Novelty: The method involves determining an emissivity value based on an arithmetic product of a predetermined roughness value and a predetermined slope-related value. A metal is sintered to form a top surface of an object (108) to be manufactured by a metal additive manufacturing system. Infrared radiation is detected from a portion of the top surface using an infrared sensor. A temperature is generated based on the detected infrared radiation and the emissive value. The temperature is applied to a temperature utilization component (114) of the metal manufacturing system, where the roughness and slope related values are provided as user inputs to the manufacturing system and configuration parameters of the system. |
| Filed: 5/18/2020 |
| Application Number: US16876725A |
| Tech ID: SD 15023.0 |
| This invention was made with Government support under Contract No. DE-NA0003525 awarded by the United States Department of Energy/National Nuclear Security Administration. The Government has certain rights in the invention. |
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