Analyses of Drill Flute and Cutting Angles |
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Authors: | Kaichun Ren Jun Ni |
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Affiliation: | (1) Mechanical Engineering College, Shanghai Jiaotong University, PR China, CN;(2) S. M. Wu Manufacturing Research Center, The University of Michigan, Ann Arbor, USA, US |
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Abstract: | The analysis of drill cutting angles is important for the design of high-performance drill geometry. The cutting angles along
the cutting edge of a drill are determined by the combination of its flute and flank surfaces. This paper examines the analysis
of both flute and flank surface models and the evaluation of drill cutting angles. A new mathematical model for an arbitrary
drill flute face is developed by sweeping the polynomial representation of the flute cross-sectional curve along the drill
axis, with a helical movement. On the basis of the quadratic flank face, a relationship between the grinding and the geometrical
design parameters of the flank face is also established. The vector analysis method is employed for the analysis of the cutting
angles for various drill geometries. A comparison of the analytical results with the actual measured cutting angles of an
example drill has shown that the average error is less than 5%. |
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Keywords: | ,Cutting angle, Drill, Flank surface, Flute surface |
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