Some studies on high-pressure cooling in turning of Ti–6Al–4V

Nandy, Abhilash; Gowrishankar, M. C.; Paul, S.

doi:10.1016/j.ijmachtools.2008.08.008

Cited by 133 publications

(49 citation statements)

References 25 publications

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“…Uniformity and super-density are other unique properties of vegetable oil molecules, which afford a thick, tenacious and vigorous film layer that offers VOs a superior ability to absorb contact pressure [18][19][20][21][22]. VOs base stocks have high thermal conductivities of up to 0.172 W/m·K and a low coefficient of friction (e.g., 0.03 for soybean oil) compared to 0.125 W/m·K and 0.07, respectively, for mineral oils [23][24][25]. An adequate understanding of cutting fluid application methods in machining operations may significantly enhance heat dissipation and thus improve the surface quality of machined parts.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of a Novel Controlled Cutting Fluid Impinging Supply System When Machining Titanium Alloys

2017

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Abstract:Following a comprehensive review on titanium machining and methods of cutting fluid application, this paper presents a new Controlled cutting fluid impinging supply system (Cut-list) developed to deliver an accurate amount of cutting fluid into the machining zone via well-positioned coherent nozzles based on the calculation of the heat generated. The performance of the new system was evaluated against a conventional flood cutting fluid supply system during step shoulder milling of Ti-6Al-4V using vegetable oil-based cutting fluid. The comparison was performed at different cutting speeds and feed rates. Comparison measures/indicators were cutting force, workpiece temperature, tool flank wear, burr formation and average surface roughness (Ra). The new system provided significant reductions in cutting fluid consumption of up to 42%. Additionally, reductions in cutting force, tool flank wear and burr height of 16.41%, 46.77%, and 31.70% were recorded, respectively. Smaller Ra values were also found with the use of the new system.

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Section: Introductionmentioning

confidence: 99%

Evaluation of a Novel Controlled Cutting Fluid Impinging Supply System When Machining Titanium Alloys

2017

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“…Furthermore, the production cost of these materials is high and errors during machining can cause serious increases in the cost of machining. [6][7][8][9][10] The life of cutting tools plays a major role in increasing the productivity and, consequently, it is an important economic factor. In order to increase the life of cutting tools, a common approach in the past was to heat-treat the tool materials, thus providing a greater control over the range of the properties that a given tool material might have.…”

Section: Introductionmentioning

confidence: 99%

Effect of cryogenic treatment applied to M42 HSS drills on the machinability of Ti-6Al-4V alloy

Kıvak¹,

Şeker²

2015

Mater. Tehnol.

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This study investigated the effects of deep cryogenic treatment applied to M42 HSS drills on the tool wear, the tool life and the surface roughness during the drilling of a Ti-6Al-4V alloy under dry and wet cutting conditions. Drilling tests were carried out using untreated, cryogenically treated, cryogenically treated and tempered, and multi-layered TiAlN/TiN-coated HSS drills. Four different cutting speeds ((6, 8, 10, 12) m/min) and a constant feed rate of 0.06 mm/r were used as the cutting parameters and holes with a depth of 15 mm were drilled. At the end of the drilling tests, it was seen that the use of a coolant increased the tool life and decreased the surface roughness. Among the four tools, the best results in terms of the tool life and surface roughness were obtained with the multi-layered TiAlN/TiN-coated tool. The cryogenically treated and tempered drills exhibited an increase of 87 % in the tool life compared to the untreated drills. Scanning electron microscope (SEM) and X-ray diffraction (XRD) analyses showed that by reducing the size of the carbide particles in the microstructure, cryogenic treatment resulted in a more uniform carbide distribution and in the transformation of retained austenite to martensite. This played an important role in the increase in the hardness and wear resistance of the cutting tools. Keywords: cryogenic treatment, microstructure, M42 HSS, drilling, tool life, surface roughness V tej {tudiji je bil preiskovan vpliv globokega podhlajevanja svedrov M42 HSS na njihovo obrabo, zdr`ljivost in hrapavost povr{ine med suhim in mokrim vrtanjem zlitine Ti-6Al-4V. Preizkusi vrtanja so bili izvr{eni z uporabo HSS neobdelanih, podhlajenih, podhlajenih in popu{~anih ter svedrov z ve~plastnim nanosom TiAlN/TiN. Uporabljene so bile {tiri razli~ne hitrosti rezanja ((6, 8, 10, 12) m/min) in konstantno podajanje 0,06 mm/r pri vrtanju 15 mm globokih izvrtin. Na koncu preizkusov vrtanja se je pokazalo, da uporaba hlajenja s teko~ino pove~a zdr`ljivost orodja in zmanj{a hrapavost povr{ine. Med {tirimi orodji je bil glede na njihovo zdr`ljivost in hrapavost povr{ine najbolj{i rezultat dose`en z orodji z ve~plastnim nanosom TiAlN/TiN. Podhlajeni in popu{~ani svedri so imeli pove~ano zdr`ljivost za 87 % v primerjavi z neobdelanimi svedri. Analize na vrsti~nem elektronskem mikroskopu (SEM) in rentgenska difrakcija (XRD) sta pokazali, da z zmanj{anjem velikosti karbidnih zrn v mikrostrukturi pri podhlajevanju dobimo bolj enakomerno razporeditev karbidov, preostali avstenit pa se pretvori v martenzit. To ima pomembno vlogo pri pove~anju trdote in odpornosti orodja za rezanje proti obrabi.

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“…High-pressure coolant seems to be very effective while machining at low feed rate. [3] Nandy et al [13] used neat oil and water soluble oil for high pressure cooling and studied its effect and concluded that tool life on high pressure cooling with water soluble oil improved by 250% then in conventional wet. High pressure cooling with neat oil did not provide substantial benefit in tool life and productivity.…”

Section: High Pressure Coolingmentioning

confidence: 99%

A Comprehensive Review on Machining of Ti6al4v

2017

IJAERD

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Some studies on high-pressure cooling in turning of Ti–6Al–4V

Cited by 133 publications

References 25 publications

Evaluation of a Novel Controlled Cutting Fluid Impinging Supply System When Machining Titanium Alloys

Evaluation of a Novel Controlled Cutting Fluid Impinging Supply System When Machining Titanium Alloys

Effect of cryogenic treatment applied to M42 HSS drills on the machinability of Ti-6Al-4V alloy

A Comprehensive Review on Machining of Ti6al4v

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