A strategy of hob-grinding the cylindrical riblet surface for drag reduction using the grinding wheel with ordered abrasive pattern

Abstract

Riblet drag reduction surface is a biomimetic surface, and studying its manufacturing technology has practical significance for solving its engineering applications. Based on the principle of gear hobbing, a hob-grinding strategy for hob-grinding the cylindrical riblet surface of reducing drag using superhard grinding wheels with engineered spiral abrasive pattern is proposed. To achieve this method, firstly, based on the analysis of the geometric topology features of the riblet surface, an engineered CBN grinding wheel with spiral arrangement of abrasive particles was designed based on the principle of gear hobbing machining; Then, the relationship between hob-grinding parameters and abrasive particle arrangement parameters on the parameters of the ground riblets was analyzed, and the process measures to increase the number of riblets on the cylindrical surface, the ratio of the riblet height to spacing, and the impact on the surface geometry of the riblets were explored; Finally, the surface of the cylindrical riblet surface was ground through experiments. The research results indicate that using this strategy can grind the cylindrical riblet surface, and the proposed process strategy of increasing the number of riblets and the ratio of the height to spacing is feasible.