Abstract
Last years products quality is estimated often by complex indices by application quality control principles. Usage of them enables to estimate and compare product quality for different variants of technology processes by a unified scale more objectively. The authors presented an approach to estimation of products quality by application of complex indices relating to hotstamped elliptical bottoms. Results of analysis of GOST requirements for the products quoted, the analysis being aimed at determining of single indices. 17 single properties of the products chosen and normalized. With the purpose of single properties estimation by a unified scale, formulas proposed for quality indices normalizing in the interval (0...1) relating to dispersion of properties values allowed by GOST. At the final stage the quality estimation of selected bottoms was made by the complex index of the product quality, calculated by two variants: as an arithmetic average weighted and geometric average weighted of 17 values of single properties. The calculated complex indices estimated by the Harrington desirability scale. Definite indices values turned out to exceed 0.8, which corresponds to high quality, even exceeding to some extent the standards requirements. It was shown, that arithmetic average weighted and geometric average weighted values of complex indices have close values and in the whole this product has a high quality. The elaborated methodology enabled to estimate the quality of hot-stamped elliptical bottoms produced by JSC “Uralchimmash” and reveal reserves of its increase at the expense of improving technological regimes of bottoms treatment at all the stages.
Highlights
В последние годы качество продукции все чаще оценивается комплексными показателями с применением принципов квалиметрии [1]
The authors presented an approach to estimation of products quality
the analysis being aimed at determining of single indices
Summary
(Уральский федеральный университет им. первого Президента России Б.Н. Ельцина, Россия, г. Их использование позволяет более объективно оценивать и сравнивать качество продукции для различных вариантов технологических процессов по единой шкале. Авторами представлен подход к оценке качества продукции с использованием комплексных показателей применительно к горячештампованным эллиптическим днищам. Приведены результаты анализа требований ГОСТов на данную продукцию с целью выделения единичных показателей качества. Выделены и нормированы 17 единичных свойств этой продукции. С целью оценки единичных свойств по единой шкале предложены формулы для нормирования показателей качества в интервале (0...1) относительно разброса допускаемых ГОСТом значений свойств. На заключительном этапе оценку качества отобранных днищ осуществили с помощью комплексного показателя качества продукции, рассчитанного по двум вариантам: как средневзвешенное арифметическое и средневзвешенное геометрическое значений 17 единичных свойств. Что средневзвешенное арифметическое и средневзвешенное геометрическое значения комплексных показателей имеют близкие значения, а в целом данная продукция имеет высокое качество.
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