Quality projection of manufacturing processes relating to environmental protection

Mitreva, Elizabeta and Chepujnoska, Violeta (2008) Quality projection of manufacturing processes relating to environmental protection. SEEU Review, Four (1). pp. 93-109. ISSN 1409-7001

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Within the implementation of the quality provision system according to ISO 9001 from 2000, technological processes are being projected through standard operating procedures in order to provide defined quality of products. The conservation of the environment it is of great importance in
such a system, especially the disposal of sewage containing dangerous reactants. Also, by proper exploitation of both the reactants and energy, the required quality can be achieved having in mind also the economy of the
process. By the implementation of a TQM approach as well as co-relational analysis as a mathematical method of quality projection of the manufacturing processes regarding the environment, the technological process of steel hardening becomes optimised by the use of the MATLAB programme, simultaneously having in mind the costs of working.
According to the technology, the steel hardening process is conducted within a temperature interval of 820-860°C, with 1-10% solution of sodium hydroxide (NaOH), and the normalisation of the steel is executed at a
temperature of 600-610°C. By the application of co-relational analysis, the optimal values of the parameters of the steel hardening process aredetermined, i.e. a temperature of 820°C and NaOH concentration of 2.38%,
which aids the achievement of the defined quality of steel firmness of 195 Brinel. Thus, both the loss of electricity and consumption of NaOH have been calculated on a yearly level, according to the hardening conditions
which were implemented by now with the standard operating procedures in the factory.
The sum of the total savings regarding the hardening of 100,000 pieces of steel per year amounts to €18033. By the implementation of this method, the defined quality can be achieved with the lowest possible costs of work.

Item Type: Article
Subjects: Engineering and Technology > Other engineering and technologies
Divisions: Faculty of Tourism and Business Logistics
Depositing User: Elizabeta Mitreva
Date Deposited: 22 Jan 2013 13:45
Last Modified: 22 Jan 2013 13:45
URI: https://eprints.ugd.edu.mk/id/eprint/4933

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