Title: Development of a framework for operational phase life assessment of machine tools using a structural approach

Authors: Kumar Sarthak; Girish Kumar; Ajith Tom James; Umang Soni; Mohammad Asjad

Addresses: Department of Mechanical Engineering, Delhi Technological University, Bawana Road, Delhi-110042, India ' Department of Mechanical Engineering, Delhi Technological University, Bawana Road, Delhi-110042, India ' A.D. Patel Institute of Technology, CVM University, Vallabh Vidyanagar, Gujarat 388120, India ' Manufacturing Processes and Automation Engineering Division, Netaji Subhash University of Technology, Sector 3 Dwarka New Delhi-110078, India ' Department of Mechanical Engineering, Faculty of Engineering and Technology, Jamia Millia Islamia, New Delhi-110025, India

Abstract: The life assessment of machine tools during operational phase is essential for ensuring the design robustness as well as scheduling of maintenance activities. To accomplish this, the factors influencing it are singled out. The operational life factors, including their interrelations are modelled, taking into consideration of their structure using graph theory. A matrix equivalent of the digraph provides machine tool operational life function (MTOLF) that characterises machine tool life, leading to the development of operational life index (OLI). An illustration of operational life assessment of two computer numerical controlled (CNC) turning centres of same capacity, but of different makes is provided using proposed methodology as an experimental application. The methodology proposed is conducive to assess and correlate design alternatives of machine tools that work in the same operating conditions and have similar specifications. This can also help the users of machine tools to improve the operating conditions to enhance the machine tool life.

Keywords: machine tool; operational life factors; operational life index; OLI; structural approach; digraph model.

DOI: 10.1504/IJPLM.2021.119526

International Journal of Product Lifecycle Management, 2021 Vol.13 No.4, pp.317 - 342

Received: 09 Feb 2021
Accepted: 02 Jul 2021
Published online: 08 Dec 2021 *

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