ENHANCING SURFACE FINISH: EXPLORING THE IMPACT OF EXTRUSION HONING PROCESS ON TITANIUM GRADE-2 ALLOY
Keywords:
Extrusion Honing (EH), Surface finish (Ra), Roughness, AbrasivesAbstract
Conventional finishing processes such as grinding, honing and lapping lag in processing intricate and inaccessible regions such as through holes, internal cavities, fuel injectors, etc. A new abrasion-based finishing process, such as extrusion honing, is developed to overcome this drawback. In this process, media, i.e., a blended mixture of silicone polymer, which is visco-elastic in nature, and SiC abrasive of known % of volume fraction and grit size, is employed. This media is considered a flowing grinding wheel and flexible in nature. The current work explores the influence of parameters such as the number of passes and bore diameter of the specimen in the extrusion honing process. The experimental study has been carried out on titanium grade-2 alloy. Experimental data is collected by constructing L9 OA for the factors considered and is verified with multiple regression analysis. The experimental plan has been executed by considering two factors, i.e., the number of passes and bore diameter involving three different levels. The study of variance (ANOVA) found that the number of passes is a significant contributing factor to the response parameter Ra, which is found to be 58.97 %. Multivariate regression analysis is performed to predict the surface finish (Ra) of the specimen within the operating range of the process by validating with extrusion-hunting trials. Finally, the current paper contrasts the result of extrusion honing trials, i.e. surface Ra, with the developed model and agrees with the established result.
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References
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