Study of surface roughness and cutting forces using ANN, RSM, and ANOVA in turning of Ti-6Al-4V under cryogenic jets applied at flank and rake faces of coated WC tool

ORIGINAL ARTICLE

Abstract

This paper presents the analysis of average surface roughness, cutting force, and feed force in turning of difficult-to-machine Ti-6Al-4V alloy by experimental investigation and performance modeling. Based on knowledge of the literature, to pacify the elevated temperature in machining Ti-6Al-4V and to ensure a clean environment, the experiments are carried out in cryogenic (liquid nitrogen) condition by following the Taguchi L18 mixed-level orthogonal array. Afterward, the models of responses have been formulated by the response surface methodology (RSM) and artificial neural network (ANN). The higher values of correlation coefficient (≥96%) and lower values of error determined the adequacy of the developed models. Comparative study of both models revealed that the RSM-based model revealed greater accuracy for the testing data and hence recommended. Analysis of variance (ANOVA) determined the effects of cutting speed, feed rate, and insert configuration on the quality characteristics. The results revealed that a cutting speed not exceeding 110 m/min is likely to generate favorable machining responses. In addition, the higher feed rate was found to ensure better machining performances. Moreover, the desirability-based multi-response optimization determined that a cutting speed of 78 m/min, a feed rate of 0.16 mm/rev, and use of the SNMM tool insert are capable of minimizing surface roughness at 1.05 μm, main cutting force at 315 N, and feed force at 208 N.

Keywords

Surface roughness Machining forces Cryogenic liquid nitrogen Artificial neural network Response surface methodology 

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Copyright information

© Springer-Verlag London 2017

Authors and Affiliations

  • Mozammel Mia
    • 1
  • Md Awal Khan
    • 2
  • Nikhil Ranjan Dhar
    • 3
  1. 1.Mechanical and Production EngineeringAhsanullah University of Science and TechnologyDhakaBangladesh
  2. 2.Industrial and Production EngineeringMilitary Institute of Science and TechnologyDhakaBangladesh
  3. 3.Industrial and Production EngineeringBangladesh University of Engineering and TechnologyDhakaBangladesh

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