Page 20 - 3D Metal Printing Winter 2020
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3D Software Innovations Gain Momentum
   officer. The company dubs the signatures, Thermal Emission Density ( TED) and Thermal Emission Planck ( TEP), as In- Process Quality Metrics (IPQM), which allow users to see internal thermal signatures and melt-pool disturbances. TED represents the input process parameters and material response, explains Beckett, while TEP represents the temperature of the region of energy deposition. Both IPQMs are calculated automatically and are available during the process and immediately after build completion.
With these data, users can ensure that printing occurs within set parameters. Should the data reveal out-of-parameter condi- tions, users receive warnings in real time and software identifies problem areas on the part. A company white paper (sigmalab- sinc.com/wp-content/uploads/2019/02/TEP-CT-correlation- Sigma-Labs-Quality-Assurance.pdf ) describes the physics behind this technology.
Sigma Labs: www.sigmalabsinc.com
Ensuring Traceability, Quality
The Assure quality control system from Velo3D enables visi- bility into every layer of the build through real-time algorithms. The offering predicts bulk material properties for each part through a multi-sensor defect-detection system. Print health is determined by combining data from multiple sensors, including melt pool-emission monitoring and X, Y and Z mapping of the powder bed to provide reliable real-time indication of part quality. This system accelerates the move to production by verifying part-to-part consistency. Moreover, Assure ensures printer health by tracking and reporting critical parameters (optics, sensors, consumables, powder-bed quality) prior to build. During a build, Assure validates that these parameters stay in spec and sub- stantiates the part quality needed for volume production by pre- dicting bulk material properties in real time for each part. Velo3D: www.velo3d.com 3DMP
    DEVELOPING THE FUTURE OF METAL MANUFACTURING
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MULTI-LAYER CONCURRENT PRINTING TECHNOLOGY
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                   18 | 3D METAL PRINTING • WINTER 2020
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