INVESTIGATING THE INFLUENCE OF PROCESS PARAMETERS ON THE PRECISION MACHINING OF SQUARE HOLES FOR INDUSTRIAL APPLICATIONS

Abstract

Generally, the holes which are drilled by drilling machines are circular, it produce the circular drills in different diameters, but to produce a square have to do many operations like slotting, tapering. The main aim of the project is to produce the square in one single step without using multiple tools. The square drill is a drill bit which is designed from the Reuleaux triangle. A drill bit that produces square holes, It can a revolving edge cut for pentagonal, hexagonal, and octagonal holes, but they derive their shape from a simple geometric construction known as a Reuleaux triangle. A square hole drill having a cutterhead configuration whose outline is in the form of a Reuleaux triangle and which also has a planetary gear drive. Two counter revolving motions are present in the drill at the same time. One is the pure rotary motion of the drill's cutterhead about its own shaft and other is the circular motion of the cutterhead as a unit about a centerline due to its eccentric mounting and drive. To achieve the opposite rotation of the unit as a whole compared to the rotation of the cutterhead about its own axis. The rotation is obtained by a flexible shaft which is designed by a series of universal joints to the drill bit.