Effect of Pre-contouring and Post-contouring on the Accuracy of Parts Produced by Direct Metal Laser Sintering

摘要

Pre-contouring speed and post- contouring speed are two process parameters in DMLS which have not received much attention of the investigators. In this experimental study, the influence of pre-contouring and post-contouring speed on the dimensional accuracy was investigated. The results show that pre-contouring speed has no significant effect on the accuracy. The accuracy is found to improve when post-contouring speed is increased. Sintering speed does not have much effect on the accuracy in the Z- direction. It is also observed that as the sintering speed increases, the curing width reduces.