A comparison of five categories of carbon-based tool coatings for dry drilling of aluminum

Dasch, Jean Muhlbaier; Ang, Carolina C.; Wong, Curtis A.; Cheng, Yang‐Tse; Weiner, Anita M.; Lev, Leonid; Konca, Erkan

doi:10.1016/j.surfcoat.2005.04.025

Cited by 63 publications

(27 citation statements)

References 18 publications

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“…This showed optimum friction and wear properties in the region V 2 = 400 to 550V, with wear rates and friction coefficients comparable to those of single-layer continuous DLC films p3 found in other works [9,10]. Based on these studies, a DLC film deposited with bias voltage (V 2 ) of 450V with zero argon was selected in order to evaluate the impact of the DLC film on the drill lifetime.…”

Section: Film Deposition and Preliminary Tribologymentioning

confidence: 68%

Energy efficiency improvements in dry drilling with optimised diamond-like carbon coatings

Zolgharni

Jones

Bulpett

et al. 2008

Diamond and Related Materials

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We demonstrate enhancements of performance and energy efficiency of cutting tools by deposition of diamond-like carbon (DLC) coatings on machine parts. DLC was deposited on steel drill bits, using plasma enhanced chemical vapour deposition (PECVD) with the acetylene precursor diluted with argon, to produce a surface with low friction and low wear rate. Drill bit performance in dry drilling of aluminium was quantified by analysis of power consumption and swarf flow. Optimised deposition conditions produced drill bits with greatly enhanced performance over uncoated drill bits, showing a 25% reduction in swarf clogging, a 36% reduction in power consumption and a greater than five-fold increase in lifetime. Surface analysis with scanning electron microscopy shows that DLC coated drills exhibit much lower aluminium build up on the trailing shank of the drill, enhancing the anti-adhering properties of the drill and reducing heat generation during operation, resulting in the observed improvements in efficiency. Variation of drilling efficiency with argon dilution of precursor is related to changes in the microstructure of the DLC coating.

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Section: Film Deposition and Preliminary Tribologymentioning

confidence: 68%

Energy efficiency improvements in dry drilling with optimised diamond-like carbon coatings

Zolgharni

Jones

Bulpett

et al. 2008

Diamond and Related Materials

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show abstract

“…As a result, dry machining has been widely investigated over the last few years. 117 Dry machining, and especially the drilling process itself, is considered to be among the most difficult of machining processes for accomplishing dry cutting in view of the special difficulties it presents such as cutting at close quarters or in a circumscribed space, lift as well as high cutting temperatures and the difficulty of chip-removal. The dry drilling of aluminum cast alloys in the absence of cutting fluids is known to involve a certain degree of difficulty particularly since these alloys display properties which are inimical to dry cutting, including high thermal expansion and low melting points.…”

Section: Dry Drilling Of Aluminum Alloysmentioning

confidence: 99%

Machinability aspects of heat-treated Al-(6-11)%Si cast alloys :

Zedan¹

2010

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“…One alternative approach with reduced cost and greater environmental benefits is dry machining. Some works have reported on dry milling [21,43,[63][64][65][66][67] and dry, mist and lubricated drilling of aluminium alloys [29,49,68]. According to [69], the processes constitutes a suitable candidate for the machining of ductile materials, such as aluminum alloys.…”

Section: Using Coolant and Lubricationmentioning

confidence: 99%