Multi-criteria assessment methodology for remanufacturing conventional grinding machines into CNC machine tools
Multi-criteria assessment methodology for remanufacturing conventional grinding machines into CNC machine tools

Summary/Abstract: Purpose: This paper presents a multi-criteria assessment methodology to evaluate theremanufacturability of converting conventionalsurface grinding machines into CNC machine tools.Methodology: Conventional surface grindingmachines remanufactured into CNC machine toolswere analyzed and classified into fiveremanufacturing alternatives. A multi-criteriaassessment model incorporating cost, time, accuracy,reliability, processing shape complexity, andergonomics was developed. The importance ofcriteria and performance of alternatives wereweighted through machine tool remanufacturingexperience analysis and comparative literaturereview.Results: The Remanufacturability Index (RI) forremanufactured conventional surface grindingmachines ranges from 0.637 to 0.999 based on thelevel of CNC upgrades from 2-axis to 5-axisconfigurations. Higher-axis remanufacturedmachines showed greater feasibility.Theoretical Contribution: This study provides aquantitative methodology to assess the technical,economic, and environmental feasibility ofremanufacturing conventional machines into CNCmachine tools. It extends the application of multi-criteria decision making to the field of machine toolremanufacturing.Practical Implications: The proposed methodologycan guide small and medium-sized manufacturers inmaking decisions to upgrade their conventional machines to CNC through remanufacturing. It helpsevaluate the benefits and risks of different upgradeconfigurations to support the implementation ofmachine tool remanufacturing in practice.

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