TypeArticle
TitleInfluence of rounded cutting-edge radius and machining parameters on surface roughness and tool wear in milling AISI H13 steel under dry and cryogenic machining
SourceJurnal Tribologi 24 (2020) 52-64
AuthorHusni Nazra Abu Bakar, Jaharah A Ghani, Che Hassan Che Haron

Abstract

Rounded cutting-edge radius has a significant influence on tool life of cutting tools and consequently on the machining performance. Thus, this study presents an experimental investigation to investigate the effects of rounded cutting-edge radius and machining parameters on surface roughness and tool wear in milling of AISI H13 tool steel (52HRC) in dry and cryogenic machining. Uncoated four flute cemented carbide cutting tools of 6mm diameter with cutting-edge radii of 0.03 and 0.05mm were prepared to be used in the study. The machining parameters applied were 0.03 and 0.06mm/tooth of feed rate and axial depth of cut of 0.1 and 0.2mm. Cutting speed was kept constant at 200m/min. The obtained results showed that the combination of low feed rate, depth of cut and cutting-edge radius in dry and cryogenic machining give the surface quality value of 0.158 and 0.146┬Ám, respectively and machining time of 4.429 and 8.652 min., correspondingly. Furthermore, cryogenic machining significantly contributed to improving the machined surface and tool life by 2.46- 7.59% and 48.81-84.62% respectively compared to dry machining. Considering all factors, cutting tool of 0.03mm edge radius showed better performance in terms of surface quality and tool wear under both machining conditions.


Content

Jurnal Tribologi 24 (2020) 52-64