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Application of response surface method and central composite inscribed design in marble surface quality modeling and optimization

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Document pages: 13 pages

Abstract: The factors affecting the final surface quality of polished marble are not fully understood. When using trial and error method to optimize multivariable polishing process, it is a difficult, time-consuming and expensive task to understand these factors. In this study, empirical practice was carried out using experimental design, especially central composite internal connection (CCI) design. The factors considered in CCI design are belt speed, rotating speed and polishing head pressure, and the response is surface gloss and roughness. A mathematical model describing the reaction was generated using the experimental data set, and the goodness of fit of the model generated using the experimental data was evaluated using analysis of variance (ANOVA). For process optimization, expectation function analysisis (DFA) was used. This study has shown that the CCI could efficiently be applied for the modelling of polishing machine for surface quality of marble strips. Better surface quality generally resulted from lower belt speeds, which increased contact time between the abrasives and strips. Optimized surface quality for marble specimen was established.

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