The remanufacturing evaluation for feasibility and comprehensive benefit of retired grinding machine

Abstract

Grinding is the last and most important process of parts processing, the purpose is to achieve high precision and surface roughness. Therefore, grinding machine has the characteristics of high added value, high technology content and great remanufacturing value. However, the evaluation of machine tool remanufacturing is based on imprecise and fuzzy information at present. The aim of this study is to present the remanufacturing evaluation for feasibility and comprehensive benefit of retired grinder. Firstly, according to the unique structure of grinder, the feasibility evaluation model of grinder remanufacturing is established, including technical feasibility criterion, economic feasibility criterion and resource environment feasibility criterion. Secondly, the comprehensive benefit evaluation model of remanufacturing grinder is established, in which the weight of each evaluation criterion is determined by Analytic Hierarchy Process (AHP). Finally, combined with the remanufacturing case of the cylindrical grinder, the evaluation method is verified and analyzed. The results show that the remanufacturing of the waste grinding machine through the feasibility evaluation can obtain better comprehensive benefits, and the remanufacturer can get considerable benefits and reduce the potential risks in the remanufacturing process.

Quantitative sustainability assessment of remanufacturing waste reinforcing steel

“…The technical feasibility index ( TF Index ) was calculated using the weighted sum method (Abdullah, 2021; Du et al., 2012; Ling & He, 2020; Science Direct, Weighted Sum, Method, 2014) which combines all of the multi‐objective functions into one scalar to calculate a composite objective function: $$$$\begin{equation}T{F}_{Index} = \left( {{W}_1 \times S{F}_1} \right)\ + \left( {{W}_2 \times S{F}_2} \right) + \left( {{W}_3 \times S{F}_3} \right) + \dots \left( {{W}_n \times S{F}_n} \right)\end{equation}$$$$…”

“…High SF values indicate a high degree of technological maturity. All SF values are within the range of 0.45−0.95 determined as the satisfaction criteria from practical experience (Abdullah, 2021; Du et al., 2012; Ling & He, 2020; Science Direct, Weighted Sum, Method, 2014).…”

“…This high value indicates high consistency among the various alternatives, which proves the technical feasibility of remanufacturing rebar waste on an industrial scale using the proposed machinery. This R 2 value is used as the final TF Index = 0.79, which exceeds the literature threshold of 0.6 for technical viability (Abdullah, 2021; Du et al., 2012; Ling & He, 2020; Science Direct, Weighted Sum, Method, 2014).…”

“…Economic sustainability satisfaction factor ( C sf ) values were taken as the R 2 values of regression plots of the CER and NPV curves (Exhibit 10) as 0.82 and 0.69, respectively. Both of these values exceed 0.6, which is generally accepted as the threshold for operating a profitable remanufacturing business (Science Direct, Weighted Sum, Method, 2014; Du et al., 2012; Ling & He, 2020; Abdullah, 2021, 2022).…”

Benign or disordered development? Assessment and simulation of security of highly aggregated tourist crowds in China

“…A criteria weighing method (AHP) calculates the weight by a pairwise comparison using a nine-point scale [ 88 , 89 ]. Various studies employed the AHP method to calculate the weight of factors [ 90 , 91 ]. Additionally, the Entropy Method is an effective method to accurately weigh the relative importance of the identified criteria [ 92 , 93 ].…”