Flute Profile Development for Drills of High Helix

Abstract

Drilling is a major and indispensable machining operation widely used in manufacturing industry. In order to enhance the performance of drill it is necessary to concentrate on the drill parameters, which are rake angle, core radius and land width. The accuracy of these parameters depends on the accuracy of flute profile.Flute profile is of much concern to the drill performance. Flute form/shape depends on the grinding wheel profile. Hence, to accurately grind the flute form, first we must determine the accurate grinding wheel profile. Grinding wheel profile defines the accuracy of flute form as well as accuracy of three parameters. Determination of grinding wheel profile involves mathematical modeling from flute form and drafting of wheel profile using that mathematical model in 3D software. In this project a mathematical method is suggested to find the wheel profile which will grind the flute profile accurately. Numerical methods are used to solve the equations. The process of determining wheel profile from flute profile is called indirect method. The purpose of dissertation work is to develop flute profile for drills of high helix.