An Automated Laser Control Technique for Improving Powder Bed Temperature Uniformity in Selective Laser Sintering

Conference paper
Part of the Lecture Notes in Mechanical Engineering book series (LNME)

Abstract

Selective Laser Sintering (SLS) of polymers is a common technique for creating structural plastic components in additive manufacturing. As a result, the mechanical strength of SLS parts is often of concern. Testing has revealed a large variation in mechanical properties of components within the same build. It is believed that this variation is a result of poor temperature control during the sintering process. The proposed control method involves using an infrared camera to measure initial powder temperature before computing an optimal laser power profile to sinter the powder. By controlling the laser energy, it is expected that a more uniform post lasing temperature can be achieved and variation in mechanical properties can be reduced. The feed-forward control method is presented along with preliminary results.

Keywords

Additive manufacturing Process control Feedforward laser control 

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Copyright information

© Springer International Publishing AG, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Department of Mechanical EngineeringThe University of Texas at AustinAustinUSA
  2. 2.Department of Computer ScienceThe University of Texas at AustinAustinUSA

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