DEVELOPMENT OF NUMERICAL MODELS FOR THE PREDICTION OF TEMPERATURE AND SURFACE ROUGHNESS DURING THE MACHINING OPERATION OF TITANIUM ALLOY (Ti6Al14V)

Authors

  • Ilesanmi Daniyan Tshwane University of Technology, Department of Industrial Engineering, Pretoria, Staatsartillerie Road, Private Bag X680, Pretoria 0001, South Africa https://orcid.org/0000-0002-7238-9823
  • Isaac Tlhabadira Tshwane University of Technology, Pretoria, Department of Mechanical & Automation Engineering, Staatsartillerie Road, Private Bag X680, Pretoria 0001, South Africa
  • Khumbulani Mpofu University of South Africa, Department of Mechanical and Industrial Engineering, 1724 Florida Park, Johannesburg, South Africa
  • Adefemi Adeodu Afe Babalola University, Department of Mechanical & Mechatronics Engineering, P. M. B. 5454, Ado Ekiti, Nigeria

DOI:

https://doi.org/10.14311/AP.2020.60.0369

Keywords:

ANN, algorithm, RSM, surface roughness, temperature

Abstract

Temperature and surface roughness are important factors, which determine the degree of machinability and the performance of both the cutting tool and the work piece material. In this study, numerical models obtained from the Response Surface Methodology (RSM) and Artificial Neural Network (ANN) techniques were used for predicting the magnitude of the temperature and surface roughness during the machining operation of titanium alloy (Ti6Al4V). The design of the numerical experiment was carried out using the Response Surface Methodology (RSM) for the combination of the process parameters while the Artificial Neural Network (ANN) with 3 input layers, 10 sigmoid hidden neurons and 3 linear output neurons were employed for the prediction of the values of temperature. The ANN was iteratively trained using the Levenberg-Marquardt backpropagation algorithm. The physical experiments were carried out using a DMU80monoBLOCK Deckel Maho 5-axis CNC milling machine with a maximum spindle speed of 18 000 rpm. A carbide-cutting insert (RCKT1204MO-PM S40T) was used for the machining operation. A professional infrared video thermometer with an LCD display and camera function (MT 696) with infrared temperature range of −50−1000 °C, was employed for the temperature measurement while the surface roughness of the work pieces were measured using the Mitutoyo SJ – 201, surface roughness machine. The results obtained indicate that there is high degree of agreement between the values of temperature and surface roughness measured from the physical experiments and the predicted values obtained using the ANN and RSM. This signifies that the developed RSM and ANN models are highly suitable for predictive purposes. This work can find application in the production and manufacturing industries especially for the control, optimization and process monitoring of process parameters.

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Published

2020-11-19

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