The system of laser sintering process monitoring and adaptive control

Abstract

To control the process parameter settings and to visually inspect the process quality, a monitoring system for the sintering process was designed. The monitoring of the sintering process is based on measurements of the maximum surface temperature and the temperature distribution at the sintering zone by the spectral ratio method. Software and hardware for adaptive process control of powder solids SLS were developed.

In situ flaw detection by IR‐imaging during electron beam melting

“…A system that could detect such flaws during the build up of a part would, in the first step, allow for very tight quality control of the parts as every layer of the build could be checked for flaws and, additionally, in the future might also give the opportunity to use "repair" strategies already during the build up of parts to heal out flaws. In the area of laser based rapid prototyping/ manufacturing systems the use of in situ process observation has been investigated by several groups (Kruth et al, 2007;Doubenskaia et al, 2010;Chivel and Smurov, 2007). The approach in laser-based systems usually is to investigate the meltpool shape and temperature directly through a coaxially mounted observation system.…”

A Review on Process Monitoring and Control in Metal-Based Additive Manufacturing

“…te r ia l Publications[38,46,[56][57][58][59][60]63,66,[70][71][72]74,76,87,88,91,113,118,119,137,148,154,[172][173][174]176,177] [29,45,60,62,80,81,84,89,99,[107][108][109]118,120,131,132,141,149,154,155,184] [24,25,27,…”