Eventos Anais de eventos
COBEM 2021
26th International Congress of Mechanical Engineering
SIMULATION AND ANALYSIS OF A DESIGNED L-DED POWDER HEAD
Submission Author:
João Victor Osório , SC
Co-Authors:
João Victor Osório, Milton Pereira, Jhonattan Gutjahr, João Antonio Wendt Dreveck
Presenter: João Antonio Wendt Dreveck
doi://10.26678/ABCM.COBEM2021.COB2021-0894
Abstract
In recent years, additive manufacturing technology based on Laser Direct Energy Deposition (L-DED) has attracted attention due to the growing potential for industrial development, mainly fabrication and repair of high added value components. However, L-DED process precisely requires devices for maintenance, repair and overhaul (MRO) goals achieve, especially in its powder feeder version. Besides to the laser optical system and appropriate material, the powder head design stands out in process precision safety, ensuring high-quality deposition and efficient raw material use. Moreover, for a given L-DED powder head developed, it is required to achieve mass flow rate aim, main stage to the desired powder laser melting efficiency and successful deposition effect. Analyzing cladding results and experimental validations, the device presents an overdid powder rate clashing to adhesion on substrate. Consequently, precise components geometry modification supported by Computational Fluid Dynamics analysis enables setback solving. The present paper describes an unsuitable powder flow solution and its challenges, ally to L-DED results analysis for experimental validation. Through the L-DED processes analysis, powder melting efficiency and its behavior was investigated. Furthermore, correlation between head design, powder feed and CFD simulations are discussed. Finally, original components and respective profile combining simulated experiments ensure excellent powder melting efficiency. Furthermore, methodology presented in this paper can be applied for different situations relating L-DED powder heads developed and its entire process efficiency.
Keywords
Laser direct energy deposition, Additive manufacturing, LASER Cladding, Laser powder head
