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TECHNICAL PAPERS

Roundness Errors in BTA Drilling and a Model of Waviness and Lobing Caused by Resonant Forced Vibrations of Its Long Drill Shaft

[+] Author and Article Information
Chyn-Shu Deng

Department of Mechanical Engineering, National Lien-Ho University, Miaoli, Taiwan, Republic of China

Jih-Hua Chin

Department of Mechanical Engineering, National Chiao Tung University, Hsinchu, Taiwan, Republic of China

J. Manuf. Sci. Eng 126(3), 524-534 (Sep 07, 2004) (11 pages) doi:10.1115/1.1765142 History: Received June 01, 2003; Revised January 01, 2004; Online September 07, 2004
Copyright © 2004 by ASME
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References

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Figures

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Cutting force system of BTA drilling 24
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Experimental setup for measuring cutting force
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Accumulated contribution of number of modes (n) and number of harmonics (m) to the dynamic radial deflection (μm). Tool diameter: 18.91 mm; feed rate: 0.05 mm/rev; tool speed: 585 rpm; shaft length: 1600 mm; hole depth: 250 mm.
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Hole roundness error: 7.1 μm; tool diameter: 18.91 mm; rotational speed: 585 rpm; shaft length: 1600 mm; feed rate: 0.1 mm; hole depth: 50 mm
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Influence of feed rates on the hole roundness error, tool diameter: 18.91 mm; rotational speed: 585 rpm; shaft length: 1600 mm
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Influence of rotational speeds on the hole roundness error, tool diameter: 18.91 mm; feed rate: 0.1 mm/rev; shaft length: 1600 mm
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Influence of shaft lengths and tool diameters on the hole roundness error, rotational speed: 585 rpm; feed rate: 0.1 mm/rev
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Influence of various rotational speeds on the wave phase, tool diameter: 18.91 mm; shaft length: 1600 mm; feed rate: 0.10 mm/rev. (a) Rotational speed: 390 rpm. (b) Rotational speed: 585 rpm. (c) Rotational speed: 855 rpm.
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Influence of rotational speeds on the wave phase, tool diameter: 18.91 mm; shaft length: 1600 mm; feed rate: 0.10 mm/rev. (a) Rotational speed: N1/2=755.4 rpm. (b) Rotational speed: N1/3=503.6 rpm. (c) Rotational speed: N1/4=377.7 rpm. (d) Rotational speed: N1/5=302.2 rpm.
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Influence of various rotational speeds on the hole profile, tool diameter: 18.91 mm; shaft length: 1600 mm; feed rate: 0.1 mm/rev; hole depth: 1 mm. (a) Rotational speed: N1/2=755.4 rpm. (b) Rotational speed: N1/3=503.6 rpm. (c) Rotational speed: N1/4=377.7 rpm. (d) Rotational speed: N1/5=302.2 rpm.

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