A Novel Approach to the Design of Self-Piloting Drills With External Chip Removal, Part 1: Geometry of the Cutting Tip and Grinding Process

Author:

Astakhov V. P.1,Galitsky V. V.2,Osman M. O. M.3

Affiliation:

1. Dept. of Mechanical Engineering, Concordia University, Montreal, Quebec, Canada, H3G 1M8

2. Dept. of Tool Manufacturing, Kiev Polytechnic Institute, Kiev, Ukraine 252056

3. Dept. of Mechanical Engineering, Concordia University, Montreal, Canada H3G 1M8

Abstract

The performance of a self-piloting drill with external chip removal is affected by the geometry of its cutting tip. A comprehensive analysis of the cutting tip geometry and its influence on the drill performance is made. This subject is treated in two parts. In Part 1, the cutting tip geometry is analyzed. Special attention is given to the flank planes and a novel approach to the design of the drill was developed. By this approach the drill flank planes are located with minimum offset of the supporting pads’ faces relative to the plane of the drill corner’s rotation. Since several important drill angles are defined, the analysis is extended to cover the grinding process. The experimental comparison between the ordinary and newly designed self-piloting drills with external chip removal is also made to show the advantages of the latter.

Publisher

ASME International

Subject

General Medicine

Reference9 articles.

1. Astakhov V. P. , FrazaoJ., and OsmanM. O. M., 1991, “On the Design of Deep-Hole Drills with Non-Traditional Ejectors,” International Journal of Production Research, Vol. 29, No. 11, pp. 2297–2311.

2. Astakhov V. P. , FrazaoJ., and OsmanM. O. M., 1994, “On the Experimental Optimization of Tool Geometry for Uniform Pressure Distribution in Single Edge Gundrilling,” ASME JOURNAL OF ENGINEERING FOR INDUSTRY, Vol. 116, pp. 449–456.

3. Astakhov, V. P., and Scorupco, A. M., 1983, “Investigation of the Chip Removal System in Deep-Hole Drilling,” (in Russian) Metallorezushie Stankye, No. 11, pp. 58–64.

4. Bloch, F., et al., 1967, “Self-piloting Drilling, Trepanning, and Deep Hole Machining. Manufacturing Data,” ASTME, Dearborn, MI, 175 p.

5. Griffiths, B. J., 1982, “An Investigation into the Role of Burnishing Pads in the Deep Hole Drilling Process,” Ph.D., Thesis, Dept. of Production Technology, Brunel University, U.K.

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