Modeling of temperature distribution in drilling of titanium

Patne, Hemant S.; Kumar, Ankit; Karagadde, Shyamprasad; Joshi, Suhas S.

doi:10.1016/j.ijmecsci.2017.09.024

Cited by 38 publications

(15 citation statements)

References 20 publications

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“…However, at elevated temperatures and higher loads, the introduction of iron phosphates into the carbon‐rich tribolayer influences the tribological performance. Considering that drilling temperatures for Ti‐6Al‐4V alloys have been reported to exceed 300°C, 21 the tribological behaviour of the cutting fluid additives from this temperature would be the region of interest. The tribological examination of these additives revealed that the combination of elevated temperatures and higher loads result in the COF values of the phosphorus‐based additive being lower or comparable to that of the polymer‐based additive.…”

Section: Discussionmentioning

confidence: 99%

An investigation into the tribological behaviour of cutting fluid additives on Ti‐6Al‐4V alloy

Gali

Riahi

2022

Lubrication Science

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The performance of polymer-based and phosphorus-based cutting fluid additives have been shown to depend on the machining conditions employed. This study investigated the tribological behaviour behind the previously reported machining performance of polymer-based and phosphorus-based additives on Ti-6Al-4V using ball-on-disc tests. The coefficient of friction (COF) was evaluated using ball-on-disc tests, surface characterisation was performed on the Ti-6Al-4V and steel ball counterfaces to investigate the wear and friction reduction mechanisms. The tribological performance of the phosphorus-based additive was observed to be influenced by the applied load and temperature. The activation of this additive resulted in a reduction in COF at elevated temperatures. However, the activation temperature was observed to be influenced by the applied load. The COF associated with the polymer-based additive was noted to increase as the temperature increased, regardless of the applied load. The formation of tribolayers from the additives was related to the COF behaviour as well as the surface damage on Ti-6Al-4V and lower material transfer to the steel counterfaces.

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Section: Discussionmentioning

confidence: 99%

An investigation into the tribological behaviour of cutting fluid additives on Ti‐6Al‐4V alloy

Gali

Riahi

2022

Lubrication Science

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“…These findings are in agreement with the observations made by Pardo et al [24] when drilling aluminium/ aluminium stacks. The aforementioned damage due to abrasion is further exacerbated by the CFRP's low degradation temperature, which is approximately 160°-200° [ 34,40] and, as such, significantly lower than the cutting temperatures typically found when drilling titanium, which depending on the cutting parameters vary between 400°and 800° [38,41,42]. With the cutting temperature this high, it is reasonable to assume that the temperature of the titanium chips is still significantly higher than the CFRP's degradation temperature.…”

Section: Influence Of Interlayer Gap Size On Interface Qualitymentioning

confidence: 99%

The impact of tool point angle and interlayer gap width on interface borehole quality in drilling CFRP/titanium stacks

Pardo

Gall

Heinemann

et al. 2021

Int J Adv Manuf Technol

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Although substantial research work has been conducted in order to understand and improve the drilling of multi-material aerospace stacks, some key aspects related to process and tool parameters and their impact on the interface quality still need to be addressed. This paper reports on the research conducted to investigate the impact of tool point angle and interlayer gap width on borehole quality, focussing on the interface region. A number of drilling tests were carried out using tools with different point angles and CFRP/titanium stacks with different interlayer gap widths. The results show that the damage on the CFRP interlayer surface is caused by the drilling of the titanium layer, as some of the upwards-travelling titanium chips penetrate into the stack interface. An increase in tool point angle results in larger entry burrs on the titanium interlayer surface, which is attributed to the correlation between tool point angle and thrust force and the capability of tools with low point angles to remove damage generated by surface skidding. The introduction of an interlayer gap promotes the ingress of titanium chips into the stack interface, thereby leading to more pronounced interface damage.

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“…Due to the complex geometry of the bit, the material being drilled varies significantly in strain, strain rate, and cutting temperature. Patne [ 12 ] developed a comprehensive finite element model by combining the cutting edge radius of the tool followed by evaluation of the temperature distribution in drilling via consideration of the heat distribution factor. Li [ 13 ] used the reverse heat transfer method to study the distribution of tool temperature during pure titanium drilling.…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation and Experimental Study on the Drilling Process of 7075-t6 Aerospace Aluminum Alloy

Luo

Tang

et al. 2021

Materials

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A finite element model for setting drilling conditions is established. The effect of feed speed and spindle speed on the drilling process was studied. In the test phase, drilling tests were conducted using three different feed speeds (60, 100, and 140 mm/min) and three different spindle speeds (800, 1000, and 1200 rpm). The correctness of the finite element model was verified by comparing the experimental and numerical simulation data. The results show that the axial force and torque increase significantly with the increase of feed speed, while the axial force and torque increase less as the spindle speed increases. The numerical simulation results show that the temperature of the cutting edge increases as the feed speed increases. Increasing the rotating speed increases the formation of chip curl. When the working conditions are high rotating speed and low feed, the tool wear is reduced, and the machining quality is better. The numerical simulation results obtained for the chip forming effect are similar to the experimental data. In addition, the simulation results show the generation of burrs. A comparison of the finite element simulation and experimental data leads to an in-depth understanding of the drilling process and ability to optimize subsequent drilling parameters, which provide reliable process parameters and technical guarantees for the successful implementation of drilling technology for space suspended ball structures.

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Modeling of temperature distribution in drilling of titanium

Cited by 38 publications

References 20 publications

An investigation into the tribological behaviour of cutting fluid additives on Ti‐6Al‐4V alloy

An investigation into the tribological behaviour of cutting fluid additives on Ti‐6Al‐4V alloy

The impact of tool point angle and interlayer gap width on interface borehole quality in drilling CFRP/titanium stacks

Numerical Simulation and Experimental Study on the Drilling Process of 7075-t6 Aerospace Aluminum Alloy

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