The study and development of monitoring strategies for hybrid process

• Grant number: 20/03119-2
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• Start date: May 01, 2020
• End date: October 31, 2021
• Field of knowledge: Engineering - Production Engineering - Product Engineering
• Principal Investigator: Reginaldo Teixeira Coelho
• Grantee: Henrique Hiram Libutti Núñez
• Host Institution: Escola de Engenharia de São Carlos (EESC). Universidade de São Paulo (USP). São Carlos , SP, Brazil
• Associated research grant: 16/11309-0 - The study, development and application of a hybrid process: Additive Manufacturing (AM) plus High Speed Machining/Grinding (HSM/G), AP.TEM

Abstract

Hybrid CNC machines, which perform additive and substrate manufacturing, have as part of their process the deposition of metallic powder. The powder is melted through an interaction with a thermal source (laser) at the base of the substrate and the adjacent layers, layer by layer. The height of the deposited layer is a factor resulting from the combination of deposition parameters e.g. laser power, advance speed, focal length, powder flow. The variability in the depositional layer implies loss of dimensions of the part, which is seen as a discontinuity and a potential failure. Thus, the present project aims to develop monitoring techniques capable of detecting flaws in the construction of the layer. In this way, it is intended to provide for several discontinuities that may exist in the final piece and as a future proposal, to allow the adjustment of process parameters dynamically.

Scientific publications

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

RIBEIRO, KANDICE S. B.; NUNEZ, HENRIQUE H. L.; VENTER, GIULIANA S.; DOUDE, HALEY R.; COELHO, REGINALDO T.. A hybrid machine learning model for in-process estimation of printing distance in laser Directed Energy Deposition. INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY, v. 127, n. 7-8, p. 12-pg., 2023-06-10. (16/11309-0, 20/03119-2, 19/00343-1)

RIBEIRO, KANDICE S. B.; NUNEZ, HENRIQUE H. L.; JONES, JASON B.; COATES, PETER; COELHO, REGINALDO T.; FRATINI, L; RAGAI, I. A novel melt pool mapping technique towards the online monitoring of Directed Energy Deposition operations. 49TH SME NORTH AMERICAN MANUFACTURING RESEARCH CONFERENCE (NAMRC 49, 2021), v. 53, p. 9-pg., 2021-01-01. (16/11309-0, 19/00343-1, 20/03119-2)