Effect of cutting factors on surface quality of AA7075 alloy: A case study while turning with ZrCN coated WC inserts

• Main Authors: Sahoo, Gyana Ranjan, Das, Diptikanta, Satpathy, Mantra Prasad, Nanda, Basanta Kumar, Kumar, Ramanuj, Panda, Amlana
• Format: Conference Proceeding
• Language: English
• Subjects: Aluminum base alloys; Aluminum oxide; Carbide tools; Inserts; Mathematical analysis; Regression analysis; Regression models; Surface properties; Surface roughness; Titanium carbonitride; Tungsten carbide; Turning (machining); Variance analysis
• ISSN: 0094-243X; 1551-7616
• DOI: 10.1063/5.0193813

This paper dispenses influence of cutting factors on surface quality of AA7075 while turning with tungsten carbide (WC) tools coated with TiN-TiCN-Al2O3−ZrCN in dry cutting environment, followed by their significance prediction on the desired output through analysis of variance (ANOVA) and prediction of mathematical model through regression analysis. Average surface roughness (Ra) was optimized following signal to noise (S-N) ratio concept of Taguchi, and finally some confirmatory experiments were executed. Results revealed augmentation of Ra on enhancing spindle speed (N) or feed (f), but on incrementing the depth of cut (d), Ra reduced first, then increased and again reduced on further increase of d. The highest factor of significance for Ra was f, taken after by N. The predicted model was significant, and possessed high determination coefficient. Optimization results revealed that the factorial combination N = 250 rpm, f = 0.05 mm.rev−1 and d = 0.2 mm was optimal for Ra, which was further validated through confirmatory experiments.