Papers by Author: Xian Feng Zhao

Abstract: Inorder to analyze the influence of the grinding wheel parameters on the spiralgroove parameters in the grinding process of spiral groove, this paper analyses indetail the influence of grinding wheel radius, fillet radius and grinding wheelcone angle on the rake angle and the opening angle of the spiral groove basedon the spiral groove mathematical model of the end mill. And two polynomial werefitted between the grinding wheel fillet and the rake angle of spiral groove. Studieshave shown that: when the wheel attitude angle remains unchanged, the fillet ofgrinding wheel influence the rake angleand opening angle of spiral groove significantly; the cone angle of grindingwheel affects the opening angle largely; the radius and cone angle of grindingwheel have the weak influence on the rake angle of spiral groove.

Abstract: This paper presents the mathematical model of helical groove of the end mill according to the differential geometry and meshing principle based on the grinding wheel attitude. The profile of the helical groove can be precisely calculated using a given wheel attitude and the relative motion between the workpiece and the grinding wheel.The relation between the grinding wheel attitude and the rake angle can be obtained through adjusting the grinding wheel attitude angle.And the accurate 3D model of helical groove was generated in the SolidWorks.The research shows that the grinding wheel attitude is the main factor that affects the rake angle of end mill.There is a linear relationship between the rake angle and the grinding wheel attitude. The smooth and accurate 3D model of helical groove lay the foundation for studying the cutting performance and dynamic characteristics of end mill.

Abstract: The four axis linkage grinding simulation system of ball-nose end mill has be developed based on the mathematical model of four axis linkage grinding through establishing ball-nose end mill's parametrical database, constructing ball-nose end mill’s and grinding wheel's solid models in Solidworks, simulating the grinding processes of the rake face and flank face of ball-nose end mill based on Boolean operation, and automatic NC programming of rake face and flank face grinding. The results show the grinding simulation system can be used to manufacture ball end mill.

Abstract: The grinding simulation system of ball-nose end mill rake face is developed based on the four axis linkage mathematical model using Solidworks and Visual Basic for Applications (VBA). Effects of grinding wheel diameter change due to wear on geometrical parameters of ball-nose end mill, such as ball-nose rake angle, column rake angle and edge strip width are investigated.