Optimization in Process Parameters on Double Track of Selective Laser Melting

  • 劉 邦佑

Student thesis: Master's Thesis


Additive manufacture (AM) such as selective laser melting (SLM) has many advantages over traditional manufacture techniques Selective laser melting is able to produce unique parts in a short time and has nearly no restriction on geometry The parameters in selective laser melting such as laser power scanning speed powder layer thickness hatch spacing and scan length have complex interactions with each other and affect the quality of the product Determining the optimal parameters for producing the high-quality product has been an important issue for manufacturers Based on the previous research of optimal laser power and scanning speed this research investigates the influence of hatch spacing and scan length A sphere packing design method was proposed to design the parameters for simulation and a three-dimensional finite element model was constructed to simulate the features of scan tracks Artificial neural networks (ANNs) were used to predict simulation results Finally optimal parameters were determined based on peak temperature difference in depth of melt pools and overlap rate of two scan tracks As a result the hatch space is recommended as 73% of laser spot size in this study if the diameter of laser spot is 120μm laser power is 180W scanning speed is 680mm/s and powder layer thickness is 40μm
Date of Award2018 Aug 16
Original languageEnglish
SupervisorYu-Lung Lo (Supervisor)

Cite this