High Productivity Rough Turning of Ti-6Al-4V Alloy, with Flood and High-Pressure Cooling

Ezugwu, E. O.; Bonney, J.; Silva, R. B. Da; Machado, Álisson Rocha; Ugwoha, E.

doi:10.1080/10402000802687866

Cited by 36 publications

(23 citation statements)

References 8 publications

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“…5. It can be clearly seen that high pressure cooling conditions have an increasing effect on tool life compared to conventional cooling, which is in agreement with the experiments performed by Nandy et al [1], Ezugwu et al [2] and Palanisamy et al [7]. Hong et al [19] stated that titanium and its alloys are poor thermal conductors.…”

Section: Tool Wear Test Resultssupporting

confidence: 87%

“…Titanium alloys have found wide application in areas such as chemical processing equipment, surgical implants, and prosthetic devices, due to their excellent corrosion resistance, as well as in the automotive industry in engine components such as valves, connecting rods, drive shafts, crankshafts, and suspension assemblies, owing to their unique characteristics, including low density or high strengthto-weight ratio (density of titanium is about 60% of that of steel or nickel-based super alloys) [1] and [2].…”

Section: Introductionmentioning

confidence: 99%

“…The major problems during machining are high temperatures and stresses close to the tool nose resulting in rapid tool wear. This is partly due to the poor thermal conductivity of titanium alloys, which implies that a considerable proportion of heat generated (about 80%) during the machining process is conducted into the cutting tool [2] and [4].…”

Section: Introductionmentioning

confidence: 99%

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Optimization of Machining Performance in High-Pressure Assisted Turning of Ti6Al4V Alloy

Çolak¹

2014

SV-JME

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In this study, a genetic algorithm has been employed to determine optimum cutting parameters in the turning of Ti6Al4V alloy under conventional and high pressure cooling conditions. Three machining performance measures, i.e. surface roughness, material removal rate and cutting power, are considered as optimization criteria. First, with multi-regression analysis of experimental responses, empirical equations are defined and, by using these equations, objective functions are constructed for each pressure level, based on a hybrid model. Objective functions are maximized by means of a genetic algorithm and optimum machining parameters are determined. Moreover, tool wear tests are carried out at a cutting condition that is close to the optimum machining parameters. Optimization results show that optimum cutting parameters and their responses, particularly in P = 6 and 150 bar cooling conditions, are quite similar, but tool life is significantly different. Maximum tool life is achieved in the highest pressure level (P = 300 bar).

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Section: Tool Wear Test Resultssupporting

confidence: 87%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Optimization of Machining Performance in High-Pressure Assisted Turning of Ti6Al4V Alloy

Çolak¹

2014

SV-JME

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“…Some special cutting technologies, such as rotary cutting [6], cutting using high pressure coolant [7], air jet assisted machining [8], etc. have been often applied to machining titanium alloy for extending tool life at higher cutting speeds.…”

Section: Introductionmentioning

confidence: 99%

Micro Ball End Milling of Titanium Alloy Using a Tool with a Microstructured Rake Face

Obikawa

Kani

2012

JAMDSM

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Many parts and structures for aerospace engineering, marine engineering, bioengineering, etc. are made of titanium alloy because of its excellent physical, chemical, biological and mechanical properties. These days, bio and medical technologies have developed, so more precise and smaller parts of this alloy are required to be machined. However, end milling of this alloy is not easy though many different types of coated end mills have been developed. In this paper, a micro ball end mill with a microstructured rake face was fabricated using focused iron beam irradiation. Then, the effects of different microstructured rake faces on cutting forces of titanium alloy Ti-6Al-4V were experimentally investigated for better machining conditions of this alloy. As a result, it was found that some particular types of microstructured rake faces reduced the cutting forces effectively.

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“…Extremely hard tool materials, such as single crystal diamond (1) , polycrystalline diamond (2) , binder-less polycrystalline cubic boron nitride (3) , were applied to machining this alloy. Machining using a rotary tool (4) (5) and high pressure coolant (6) were applied to decrease cutting temperature. Nowadays, numerical modeling of machining this alloy (7) (8) using constitutive equations of this material at higher temperatures and higher strain rates (9) is often presented instead of theoretical study of complicated cutting mechanisms with serrated chip formation.…”

Section: Introductionmentioning

confidence: 99%

Air Jet Assisted Machining of Titanium Alloy

Obikawa

Funai

Kamata

2011

JAMDSM

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Titanium alloy has been applied to elements and structures in aerospace engineering, bioengineering, marine engineering, etc. because of its superior properties. However, machining of this alloy is likely to accelerate tool wear, shorten tool life and deteriorate the surface integrity. Therefore, high-speed machining of this alloy has been studied for many years. In this study, finish-turning of Ti-6Al-4V was conducted at higher cutting speeds using a new lubrication method called air jet assisted (AJA) machining, in which not only the cutting fluid but also the jet of compressed air was applied to the cutting zone to extend tool life. The results of cutting experiments using an uncoated cemented carbide tool showed that the air jet toward the tool tip applied to the conventional wet machining was effective to extend the tool life. Finally, cooling mechanism in AJA machining was discussed from a viewpoint of enhancement of the heat transfer coefficient from the cutting tool to the cutting fluid.

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High Productivity Rough Turning of Ti-6Al-4V Alloy, with Flood and High-Pressure Cooling

Cited by 36 publications

References 8 publications

Optimization of Machining Performance in High-Pressure Assisted Turning of Ti6Al4V Alloy

Optimization of Machining Performance in High-Pressure Assisted Turning of Ti6Al4V Alloy

Micro Ball End Milling of Titanium Alloy Using a Tool with a Microstructured Rake Face

Air Jet Assisted Machining of Titanium Alloy

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