Flow visualization and characterization for optimized MQL machining of composites

Iskandar, Youssef; Tendolkar, Amit; Attia, Helmi; Hendrick, Patrick; Damir, A.; Diakodimitris, Christophe

doi:10.1016/j.cirp.2014.03.078

Cited by 60 publications

(16 citation statements)

References 6 publications

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“…Therefore, minimum quantity lubrication (MQL) provides a viable alternative, in addition to the economic and environmental benefits. The optimization of MQL parameters in milling of CFRP was recently studied through flow visualization to determine the optimal MQL parameters for improved cooling and lubrication capacity [94]. It was found that better machining performance and dimensional accuracy were obtained with a coherent jet with small magnitude/number of vorticities, and small droplets of high velocity.…”

Section: Dry Machining and Minimum Quantity Lubrication (Mql)mentioning

confidence: 99%

High performance cutting of advanced aerospace alloys and composite materials

M’Saoubi¹,

et al. 2015

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Section: Dry Machining and Minimum Quantity Lubrication (Mql)mentioning

confidence: 99%

High performance cutting of advanced aerospace alloys and composite materials

M’Saoubi¹,

et al. 2015

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“…They found that the airflow field will play a drag role on the entry of micro droplets at a high jet velocity when micro droplets are injected along the 'entry flow' in the airflow field (avoiding the 'return flow'). Iskandar et al [12] found that the jet velocity researches at 35 m/s when air flow rate is set as 31 L/min. Therefore, although dosage of NEBL is lower than traditional MWFs, the 'useful' flow rate is higher thanks to bigger jet speed of NEBL droplets with the help of high pressure gas.…”

Section: Introductionmentioning

confidence: 99%

Nano-enhanced biolubricant in sustainable manufacturing: From processability to mechanisms

Zhang

et al. 2022

Friction

158

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To eliminate the negative effect of traditional metal-working fluids and achieve sustainable manufacturing, the usage of nano-enhanced biolubricant (NEBL) is widely researched in minimum quantify lubrication (MQL) machining. It’s improved tool wear and surface integrity have been preliminarily verified by experimental studies. The previous review papers also concluded the major influencing factors of processability including nano-enhancer and lubricant types, NEBL concentration, micro droplet size, and so on. Nevertheless, the complex action of NEBL, from preparation, atomization, infiltration to heat transfer and anti-friction, is indistinct which limits preparation of process specifications and popularity in factories. Especially in the complex machining process, in-depth understanding is difficult and meaningful. To fill this gap, this paper concentrates on the comprehensive quantitative assessment of processability based on tribological, thermal, and machined surface quality aspects for NEBL application in turning, milling, and grinding. Then it attempts to answer mechanisms systematically considering multi-factor influence of molecular structure, physicochemical properties, concentration, and dispersion. Firstly, this paper reveals advanced lubrication and heat transfer mechanisms of NEBL by quantitative comparison with biolubricant-based MQL machining. Secondly, the distinctive filmformation, atomization, and infiltration mechanisms of NEBL, as distinguished from metal-working fluid, are clarified combining with its unique molecular structure and physical properties. Furtherly, the process optimization strategy is concluded based on the synergistic relationship analysis among process variables, physicochemical properties, machining mechanisms, and performance of NEBL. Finally, the future development directions are put forward aiming at current performance limitations of NEBL, which requires improvement on preparation and jet methods respects. This paper will help scientists deeply understand effective mechanism, formulate process specifications, and find future development trend of this technology.

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“…However, 27% improvement of surface roughness is possible during end milling of mild steel under 900ml/h flow rate of MQL while uncoated end mill cutter of HSS used, and it is also evident that MQL works efficiently at less speed and depth of cut [71]. Iskandar et al, [72] conducted experiments to establish optimum MQL conditions by considering various parameters such as flow rate of oil and air, spray angle, nozzle distance, and flow characteristics of the milling process of carbon fiber reinforced plastics (CFRP). The study uncovers that if the nozzle placed near the cutting zone, optimum MQL spray achieved from low oil and high airflow rate, verified from Phase Doppler Anemometry and Particle image velocimetry.…”

Section: Mql In Millingmentioning

confidence: 99%

“…Iskandar et al, [72] Carbon fiber reinforced plastics (CFRP) Dry, MQL, Flood MQL shows 30% less wear at the flank face than pressurized air condition and 22% less wear than flood and dry conditions. Liao et al, [73] NAK80 mold steel (41 HRc) Dry, Flood, MQL Combining superior heat-resistant, coated carbide tool with MQL gives better tool life than other methods.…”

Section: Mqlmentioning

confidence: 99%

Effects of Minimum Quantity Lubrication Technique in Different Machining Processes - A Comprehensive Review

Urmi

Rahman

Safiei

et al. 2022

ARFMTS

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The cooling condition has a significant effect in the metal cutting industry, which has a crucial role in cooling and lubricating the workpiece-tool interface, reducing friction, and removing chips from the cutting area. Almost 15-20% of the overall machining cost was incurred from cooling and lubrication. So, the considerable cost can be occurred due to the supply, preparation, and disposal of cooling lubricants. Moreover, exposure to these substances can pollute the environment and hamper operators' health. Therefore, of late, researchers have been giving priority to investigate the effects of the Minimum Quantity Lubrication (MQL) techniques in machining as it alleviates the coolant usage by splashing fluid and compressed air mixtures. In this lubrication technique, the maximum fluid flow is less than 50ml/h, whereas flooded cooling technology uses up to 12,000 litres per hour. Most researchers found that a lower coefficient of friction, better surface finish, reduced cutting forces, and torques can be obtained using the MQL method in an optimized manner compared to dry and wet machining. Moreover, besides improving machinability characteristics, the MQL technique also complies with green and sustainable machining. Thus, a prospective solution to dry and wet processing. This paper represents the brief discussion and mechanism of the MQL technique and the effects of the MQL technique on the performance parameters of different machining processes.

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Flow visualization and characterization for optimized MQL machining of composites

Cited by 60 publications

References 6 publications

High performance cutting of advanced aerospace alloys and composite materials

High performance cutting of advanced aerospace alloys and composite materials

Nano-enhanced biolubricant in sustainable manufacturing: From processability to mechanisms

Effects of Minimum Quantity Lubrication Technique in Different Machining Processes - A Comprehensive Review

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