Investigation of friction in end-milling of Ti-6Al-4V under different green cutting conditions

Liu, Zhiqiang; Chen, Ming; An, Qinglong

doi:10.1007/s00170-014-6730-6

Cited by 30 publications

(7 citation statements)

References 12 publications

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“…This is due to enhanced cooling / lubrication effect provided by penetrating ability of MQL oil mist vis-à-vis machining speed as compared to wet / flooded condition. These findings are in concurrence with the findings by ZhiQiang Liu et al [25,26]. ANOVA results indicate that Depth of Cut is most significant factor influencing the forces (71.8 % contribution), feed per tooth is 2 nd highest contributing factor (18.15 % contribution), Lubrication / Cooling conditions have 3 rd highest influence (6.33 % contribution) and contribution of speed (1.48 % contribution) is in-significant.…”

Section: Resultssupporting

confidence: 90%

“…The results specified that oil mist penetration ability of MQL has a major impact on milling temperatures and forces. He also analysed that the use of high-pressure air or MQL leads to severe minimization of friction in Ti-6Al-4V end-milling as compared with dry cutting [26]. Jingjing Liu et al [27] showed that liquid N2 could decreases the temperature and forces in titanium milling in relation to dry cutting with higher tool life and better surface quality.…”

Section: Introductionmentioning

confidence: 99%

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Effects of Machining Parameters on Feed Direction Cutting Forces in Meso-Scale End-Milling of Ti-6Al-4V Under Dry, Wet and MQL Environment

Rauf

Jaffery

Khan

et al. 2022

Advances in Transdisciplinary Engineering

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High strength, resistance to corrosion, small density and remarkable strength to weight ratio of titanium distinguish it from other metals and is a reason for its use in in renowned industrial setups like bio-medical, automotive, aeronautics, and power generation industries. However, these are considered as difficult-to-machine elements because of less heat conductivity, minimum value of modulus of elasticity, substantial chemical reactivity and elevated temperature strength. Ti-6Al-4V is regarded as major industrial alloy and a focus of research studies. Measurement and analysis of machining forces provides a deep insight into the mechanics of machining and assist in understanding machinability, tool wear / fracture, machining precision, chatter stability, energy, surface quality and temperature. This further helps in finding optimum machinability parameters for different materials. Machining forces are affected by a number of factors including cutting conditions and lubrication / cooling environment. In this research, analysis of milling forces under three different lubrication / cooling environments i.e. Dry, Wet and MQL (Minimum Quantity Lubrication) along with effects of milling parameters during meso-scale milling of Ti-6Al-4V has been conducted. End milling experiments have been performed basing on Taguchi L9 orthogonal array for optimal combination of milling parameters, keeping spindle speed, depth of cut, feed per tooth and cooling conditions as the control factors. Contribution ratios of different milling parameters and lubrication / cooling environment on feed direction forces have been analyzed through ANOVA.

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Section: Resultssupporting

confidence: 90%

Section: Introductionmentioning

confidence: 99%

Effects of Machining Parameters on Feed Direction Cutting Forces in Meso-Scale End-Milling of Ti-6Al-4V Under Dry, Wet and MQL Environment

Rauf

Jaffery

Khan

et al. 2022

Advances in Transdisciplinary Engineering

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“…Minimum quantity cooling lubrication (MQCL) using combination of minimum quantity lubrication (MQL) and high pressure air as coolant is recommended in low to moderate cutting speeds 38 while the use of solid lubricants, coated tools and LN2 are found to perform significantly better in high-speed machining. 39,40 The various wear phenomena are seen in tools resulting from type, location, treatment and configuration of cutting tool. The abrupt chipping of the cutting tool is noted in face milling even at flank wear values as low as 0.018 mm.…”

Section: Cutting Parameters Influencing Machining Of Ti6al4vmentioning

confidence: 99%

“…These techniques are found to be effective at low and moderate cutting speeds representing a decrease in cutting forces as well as temperatures. 39,73–75…”

Section: Tool Life Improvement In Ti6al4v Machiningmentioning

confidence: 99%

Developments in cutting tool technology in improving machinability of Ti6Al4V alloy: A review

Saini

Pabla

Dhami

2016

Proceedings of the Institution of Mechanical Engineers, Part B:

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Ti6Al4V is the most widely used titanium alloy and is a demanding material in applications requiring high specific strength and corrosion resistance, that is, aerospace, automobile and biomedical industries. However, the poor machinability of this alloy, resulting from its low thermal conductivity, high hardness at elevated temperatures, high chemical reactivity with the cutting tool and low elastic modulus, restricts its usage. As a result, the tool life in machining of Ti6Al4V is substantially less than conventional materials such as steel and aluminium. This work reviews the various techniques employed in improving the machinability of Ti6Al4V alloy, from the perspective of cutting tool technology. The focus is onto the parameters affecting tool life in machining of Ti6Al4V alloy with some trending techniques and their feasibility, considering the economics to develop the best techno-economic method.

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“…Moreover, a significant decrease in surface roughness and machining temperature was reported during both MQL and MQCL conditions. Liu et al [ 28 ] examined the effect of dry, MQL, and high-pressured air cooling/lubrication conditions on tool life and surface finish of Ti6Al4V during the end milling operation. The experimentation process was conducted at two different cutting speeds (60 m/min and 150 m/min), and it was observed that both MQL and high-pressure air conditions can reduce the friction pressure coefficient (Kf) drastically (up to 50%) and hence reduce the tool-tip temperature significantly.…”

Section: Introductionmentioning

confidence: 99%

Helical Milling of CFRP/Ti6Al4V Stacks Using Nano Fluid Based Minimum Quantity Lubrication (NF-MQL): Investigations on Process Performance and Hole Integrity

Mughal

Farooq

et al. 2023

Materials

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The structural components in the aeronautical industry require CFRP/Ti6Al4V stacks to be processed together, which results in poor hole integrity due to the thermal properties of the materials and challenges related to processability. These challenges include quality variation of the machined holes because of the limitations in process properties. Therefore, a novel solution through helical milling is investigated in the study using nano fluid based minimum quantity lubrication (NF-MQL). The analysis of variance shows, for Ti6Al4V, eccentricity (PCR = 28.56%), spindle speed (Ti) (PCR = 42.84%), and tangential feed (PCR = 8.61%), and for CFRP, tangential feed (PCR = 40.16%), spindle speed (PCR = 28.75%), and eccentricity (PCR = 8.41%) are the most significant parameters for diametric error. Further on, the rise in the circularity error is observed because of prolonged tool engagement at a higher value of tangential feed. Moreover, the surface roughness of Ti was reduced with an increasing percentage of MoS2 in the lubricant. The spindle speed (37.37%) and lubricant (45.76%) have a potential influence on the processing temperature, as evident in the analysis of variance. Similarly, spindle speed Ti (61.16%), tangential feed (23.37%), and lubrication (11.32%) controlled flank wear, which is critical to tool life. Moreover, the concentration of MoS2 decreased edge wear from ~105 µm (0.5% concentration) to ~70 µm (1% concentration). Thorough analyses on process performance in terms of hole accuracy, surface roughness, processing temperature, and tool wear are carried out based on the physical science of the process for cleaner production. The NF-MQL has significantly improved process performance and hole integrity.

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Investigation of friction in end-milling of Ti-6Al-4V under different green cutting conditions

Cited by 30 publications

References 12 publications

Effects of Machining Parameters on Feed Direction Cutting Forces in Meso-Scale End-Milling of Ti-6Al-4V Under Dry, Wet and MQL Environment

Effects of Machining Parameters on Feed Direction Cutting Forces in Meso-Scale End-Milling of Ti-6Al-4V Under Dry, Wet and MQL Environment

Developments in cutting tool technology in improving machinability of Ti6Al4V alloy: A review

Helical Milling of CFRP/Ti6Al4V Stacks Using Nano Fluid Based Minimum Quantity Lubrication (NF-MQL): Investigations on Process Performance and Hole Integrity

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