Experimental correlation between acoustic emission and stability in micromilling of different grain-sized materials

Autor(es)

Ribeiro, K. S. B. ^[1] ; Venter, G. S. ^[2] ; Rodrigues, A. R. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Sao Carlos Sch Engn, Ave Trabalhador Sancarlense 400, Sao Carlos, SP - Brazil

^[2] Univ Fed Parana, Dept Mech Engn, Ave Cel Francisco H dos Santos 210, Curitiba, Parana - Brazil

• Tipo de documento: Artigo Científico
• Fonte: INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY; v. 109, n. 7-8, p. 2173-2187, AUG 2020.
• Citações Web of Science: 1

Resumo

Unstable cutting in micromilling could severely damage the tool and hinder the possibility to a usable machined part. This study proposes an experimental correlation between cutting stability, acoustic emission (AE) signal and roughness profile in micro-end milling operations. The monitoring of cutting stability occurred over the micromilling of two different grain-sized mid-carbon steel. The results have shown that the grain size influences the amplitude of AE signal. The root mean square of AE (AErms) has an expressive rise when performing unstable cutting in both workpiece materials, influencing the roughness surface levels. The index proposed to correlate the AErms data to the cutting stability is experimentally validated and a new threshold for chatter and chatter-free cut is proposed. Although AE in-process monitoring is feasible for recognizing chatter occurrence in micromilling operations and general profile patterns, an overall prediction of surface roughness depends on more than AE data. (AU)

• Processo FAPESP: 14/23108-4 - Controle ativo para redução de chatter em processos de torneamento utilizando atuadores piezelétricos multicamadas
• Beneficiário: Giuliana Sardi Venter
• Modalidade de apoio: Bolsas no Brasil - Doutorado