A manufacturing model of carbide-tipped spherical milling cutters

Abstract

The paper presents a manufacturing model for use in grinding the front-end surfaces of a carbide-tipped spherical milling cutter. The concepts of radial equidistant lines and oblique equidistant surfaces are presented. Based upon these concepts, a model of the cutting edge of a spherical milling cutter is derived by solution for the intersection of the spherical front-end surface of the cutter and the equation of a sphere. A special mechanism model is also presented for grinding the rear cutting-edge surface of the cutter. To ensure that the mechanism model is valid, the cutting-edge curve of the cutter is also on the rear cutting-edge surface. The associated geometric and manufacturing parameters are further optimized to ensure that the best quality of the carbide-tipped spherical milling cutter can be achieved. The mechanism is also used to study the manufacturability of spherical milling cutters for slightly varying specifications. A numerical example is presented to illustrate the effectiveness of the proposed modelling procedure for producing carbide-tipped spherical milling cutters. Numerical results indicate that the proposed manufacturing model and grinding procedure are capable of producing a family of carbide-tipped spherical milling cutters with an accuracy up to the user-provided specific tolerance. Some major contributions of the proposed approach are summarized in the conclusions.

Signal Analysis of Acoustic Emission for Laser Imitating Grinding Burn

“…When different external forces act respectively on the same material or the same external force acts on different materials, the elastic waves will have different characteristics. Hence elastic waves can be used for material non-destruction tests or monitoring many machining processes [1,2]. Among machining processes, grinding is a common machining process for nickel based alloy components because it can produce well-controlled surface integrity and tight geometric tolerance.…”