Effects of Controlled Modulation on Surface Textures in Deep-Hole Drilling

Deep-hole drilling is among the most critical precision machining processes for production of high-performance discrete components. The effects of drilling with superimposed, controlled low-frequency modulation - Modulation-Assisted Machining (MAM) - on the surface textures created in deep-hole dril...

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Bibliographic Details
Published in:SAE International Journal of Materials and Manufacturing 2013-01, Vol.6 (1), p.24-32, Article 2012-01-1868
Main Authors: Mann, J B, Saldana, C J, Guo, Yeung, Compton, W D, Chandrasekar
Format: Article
Language:English
Subjects:
Burnishing
Cutting tools
Drilling
Drills
Experimental results
Flutes
Frequency modulation
Machining
Morphology
Precision machining
Rotation
Surface finishing
Surface layers
Surface roughness
Surface texture
Titanium alloys
Titanium base alloys
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Summary:Deep-hole drilling is among the most critical precision machining processes for production of high-performance discrete components. The effects of drilling with superimposed, controlled low-frequency modulation - Modulation-Assisted Machining (MAM) - on the surface textures created in deep-hole drilling (ie, gun-drilling) are discussed. In MAM, the oscillation of the drill tool creates unique surface textures by altering the burnishing action typical in conventional drilling. The effects of modulation frequency and amplitude are investigated using a modulation device for single-flute gun-drilling on a computer-controlled lathe. The experimental results for the gun-drilling of titanium alloy with modulation are compared and contrasted with conventional gun-drilling. The chip morphology and surface textures are characterized over a range of modulation conditions, and a model for predicting the surface texture is presented. Implications for production gun-drilling are discussed.
ISSN:1946-3979
1946-3987
1946-3987
DOI:10.4271/2012-01-1868