The combined influence of various design and process parameters of gundrilling on tool life: experimental analysis and optimization
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This paper examines experimentally the combined influence of various design and regime parameters in gundrilling on tool life. Cutting speed, feed, approach angles, flank angles and vertical shifts of the outer and inner cutting edges, location of the drill point are included into consideration. It is demonstrated that tool life is a complex function of not only each of the considered parameters alone but also of their combinations. The Hooke and Jeeves method has been used to optimize the geometry of gundrills by the criterion of tool life. It is shown that understanding the most essential system relationships in the drilling process allows the adjusting of the regime and design parameters of gundrilling to achieve not only the maximum tool life, but also chip breakability and highest feed (productivity).
KeywordsGundrilling Tool geometry Tool life Optimization of the regime and design parameters Interrelations of different gundrilling parameters
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- 1.Astakhov VP (2002) A primer on gundrilling, in F&M MagazineGoogle Scholar
- 5.Astakhov VP (2004) Ch. 9: tribology of metal cutting. In: Liang GTaH (ed) Mechanical tribology. Material characterization and application. MarcelDekker, New York, pp 307–346Google Scholar
- 6.Astakhov VP, Frazao J, Osman MOM (1994) On the experimental optimization of tool geometry for uniform pressure distribution in single edge gundrilling. ASME J Eng Ind 118:449–456Google Scholar
- 7.Swinehart HJ (ed) (1967) Gundrilling, trepanning, and deep hole machning. SME, Dearborn, MIGoogle Scholar
- 8.Pfleher F (1977) Aspekte zur konstruktiven gestolrung von tiefbohrwerkseugen (in German). Werkstattstechnik 67:211–218Google Scholar
- 12.Astakhov VP, Galitsky VV, Osman MOM (1995) A novel approach to the design of self-piloting drills with external chip removal, Part 2: bottom clearance topology and experimental results. ASME J Eng Ind 117:464–474Google Scholar
- 13.Astakhov VP (2006) Tribology of metal cutting. Elsevier, LondonGoogle Scholar
- 15.Astakhov VP (1998) Metal cutting mechanics. CRC Press, Boca Raton, USAGoogle Scholar
- 16.Fink P (1979) Achneidkeilgeometrie von einlippenbohrern and bohrungsgute (In German). TZ Prakt Metallbearb 73:16–22Google Scholar