Geometry analysis of straight fluted taps

Abstract

The paper presents cutting tools geometry analysis of the active part of straight fluted taps. In addition to setting the analytical models, the taps are modeled in Autodesk Inventor CAD package with main parameters from external database. The geometry of the cutting tool is defined in detail in the geometry system, which includes a set of geometric parameters that determine the absolute and relative positions of all elements in machining system. This system includes all the parameters that determine the geometric accuracy of machines, tools and fixtures, as well as initial indicators of quality. Surfaces, cutting edges and tool angles, as a set of geometric elements with certain relations, define the geometry of the cutting tool. To derive the relation between the angles that define the geometry of the tools, the transformation matrix for coordinate systems of taps is defined, using the conventions for their description and representation which are used in problems of the solid modeling, i.e. computer graphics. In this way we can detect the influence of geometry on the main process factors: friction and wear between the tool and the chip, tool and part, tool life, the dynamic stability of a machining system, temperature and heat balance in the cutting zone, chip shape, surface finish, and others.