On grinding force ratio, specific energy, G-ratio and residual stress in SQCL assisted grinding using aerosol of MWCNT nanofluid
TL;DR: In this article, water based multi-walled carbon nanotube (MWCNT) dispersed nanofluid was produced and used as a cutting fluid in small quantity cooling lubrication (SQCL) assisted gri...
Abstract: In the present investigation, water based multi-walled carbon nanotube (MWCNT) dispersed nanofluid was produced and used as a cutting fluid in small quantity cooling lubrication (SQCL) assisted gri...
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53 citations
TL;DR: In this article , the grain tribological mechanism and an improved temperature model based on a discrete heat source are proposed to reveal the temperature variation law of a workpiece in an actual grinding process.
15 citations
TL;DR: In this paper, the cooling condition in the grinding contact zone (GCZ) determines the cooling effect during high-efficiency deep grinding (HEDG), and cooling conditions play an important role in controlling thermal damage in high efficiency deep grinding.
Abstract: Coolants play an important role in controlling thermal damage in high-efficiency deep grinding (HEDG). The cooling condition in the grinding contact zone (GCZ) determines the cooling effect during ...
7 citations
TL;DR: In this article , the effects of hard grinding with key focus on temperature, surface roughness and chips morphology under the application of CNT-mixed MQL and compressed air were studied.
Abstract: Conventional flood cooling system has some environmental and economic issues. Minimum quantity lubrication (MQL) has been established as a better strategy to control the machining temperature than conventional flood cooling system. Integrated use of carbon nanotube (CNT) with MQL has been drawing attention in recent times. The purpose was to study the effects of hard grinding with key focus on temperature, surface roughness and chips morphology under the application of CNT-mixed MQL and compressed air. The hardness of work material (AISI 1060 steel) was varied at three values (40, 45 and 50 HRC) with the variation of fluid flow rates and infeed rates to observe the machining behaviour. Experimental plan was established using full factorial design of experiment while mathematical models and optimisation were constructed following response surface methodology (RSM). Optimum output responses were flow rate 75 ml/h, infeed (depth of cut) 10 µm and hardness of material is from 40 to 45 HRC. Fluid flow rate of 75 ml/h resulted in best surface finish while work material of 40 HRC hardness generated lowest temperature while machining. A lower hardness values and a moderate flow rate produced favourable machining outcomes, i.e. lower temperature and improved surface finish.
2 citations
DOI•
02 Jan 2023
TL;DR: In this paper , the effects of hard grinding with key focus on temperature, surface roughness and chips morphology under the application of CNT-mixed MQL and compressed air were studied.
Abstract: ABSTRACT Conventional flood cooling system has some environmental and economic issues. Minimum quantity lubrication (MQL) has been established as a better strategy to control the machining temperature than conventional flood cooling system. Integrated use of carbon nanotube (CNT) with MQL has been drawing attention in recent times. The purpose was to study the effects of hard grinding with key focus on temperature, surface roughness and chips morphology under the application of CNT-mixed MQL and compressed air. The hardness of work material (AISI 1060 steel) was varied at three values (40, 45 and 50 HRC) with the variation of fluid flow rates and infeed rates to observe the machining behaviour. Experimental plan was established using full factorial design of experiment while mathematical models and optimisation were constructed following response surface methodology (RSM). Optimum output responses were flow rate 75 ml/h, infeed (depth of cut) 10 µm and hardness of material is from 40 to 45 HRC. Fluid flow rate of 75 ml/h resulted in best surface finish while work material of 40 HRC hardness generated lowest temperature while machining. A lower hardness values and a moderate flow rate produced favourable machining outcomes, i.e. lower temperature and improved surface finish.
1 citations
References
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TL;DR: In this paper, the role of nanolubricants during workpiece-tool interaction was investigated in minimum-quantity lubrication grinding with an aluminium oxide wheel under varied infeed conditions.
Abstract: This paper presents the study of mechanism of nanolubricant impingement in minimum quantity lubrication grinding. To study the role of nanolubricants (a new class of advanced lubricants integrating multicomponent chemistries) during workpiece-tool interaction, surface-grinding tests were performed on ductile iron workpieces using an aluminium oxide wheel under varied infeed conditions. The process performance in terms of force ratio, specific energy, and G-ratio has shown substantial improvement when using nanolubricant. Formation of tribo-chemical films of Mo–S–P chemistry complex on the workpiece surface was identified as the mechanism responsible for these improvements.
77 citations
"On grinding force ratio, specific e..." refers background in this paper
...The effect of MoS2 (Kalita et al., 2012) and graphite (Alberts et al., 2009) dispersed nanofluids were also analyzed and it was observed that the high lubrication capability exhibited by these nanofluids could significantly influence the overall grinding performance....
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...The effect of MoS2 (Kalita et al., 2012) and graphite (Alberts et al....
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TL;DR: In this paper, the authors investigated the effect of liquid nitrogen cooling on the ground surface integrity of the AISI 304 stainless steel and their consequences on the fatigue lifetime of the components ground under this cooling mode.
65 citations
"On grinding force ratio, specific e..." refers background in this paper
...Ben Fredj and Sidhom (2006) studied residual stress on ground sample of AISI 304 stainless steel, which was produced by grinding....
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TL;DR: In this article, the application of the minimum quantity lubrication (MQL) technique in abrasive machining in comparison to conventional and dry grinding is discussed. And the results obtained determined that MQL performance can be compared to flood delivery under the conditions investigated.
Abstract: Fluid delivery in grinding process remains an important matter requiring further research. The growing demand and the rising cost of cutting fluid usage and the environmental aspect of fluid disposal are a key driver for research into alternative fluid delivery techniques. One of the alternative fluid reduction methods employed in machining is minimum quantity lubrication (MQL). In specific grinding operations, MQL is capable of maintaining or even reducing temperature, yet using extremely small amounts of lubricant. Therefore, MQL addresses not only more economical production costs but also a critical matter of the natural and worker environment protection. This article reviews application of the MQL technique in abrasive machining in comparison to conventional and dry grinding. Common steels EN8, M2, and EN31 were ground with a general purpose alumina wheel. Results obtained determined that MQL performance can be compared to flood delivery under the conditions investigated. In some specific conditions, ...
53 citations
"On grinding force ratio, specific e..." refers background in this paper
...A substantial improvement in grinding performance under SQCL environment in terms of reduced force level, surface roughness and improved wheel life has been documented in the literature (Sadeghi et al., 2009; Tawakoli et al., 2010; Barczak and Batako 2012)....
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TL;DR: In this paper, a small quantity cooling lubrication (SQCL) technology using nanofluids, namely, multiwalled carbon nanotube (MWCNT) and alumina nanofluid, was used for reciprocating surface grinding using a vitrified SiC wheel.
Abstract: Ti-6Al-4V is a difficult-to-grind material as chips tend to adhere to the grit materials of an abrasive wheel due to its chemical affinity. In the present work, it has been attempted to improve the grindability by application of small quantity cooling lubrication (SQCL) technology using nanofluids, namely, multiwalled carbon nanotube (MWCNT) and alumina nanofluid. The suitability of nanofluids was experimentally evaluated in reciprocating surface grinding using a vitrified SiC wheel. Substantial improvement in grindability under the influence of MWCNT nanofluid (SQCL) could be achieved compared to soluble oil (flood). Reduction of specific grinding forces and specific energy was observed due to the combined effect of superior heat dissipation and lubrication abilities; when the latter one was realized through on-site rolling of MWCNT strands, inter-tubular slip and solid lubrication of the film adhered onto the wheel surface. These outperforming characteristics of MWCNT nanofluid helped in retaini...
47 citations
"On grinding force ratio, specific e..." refers background in this paper
...A recent literature (Paul et al., 2017) compares the performance of alumina and MWCNT nanofluid in grinding Ti-6Al-4V alloy and recommends in favor of the later....
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01 May 2006
TL;DR: In this paper, a new approach is introduced to refine the analysis for the chip energy in the highefficiency deep grinding process, by considering the heat partitioning at the chip formation area.
Abstract: A new approach is introduced to refine the analysis for the chip energy in the highefficiency deep grinding process, by considering the heat partitioning at the chip formation area. The analysis for the chip-work subsystem has been combined with the whole thermal system to derive the grinding temperature on the workpiece surface. The variation of chip temperature with material removal rate under different grinding conditions was investigated, and the relationship between the chip temperature and workpiece contact temperature was derived. The grinding temperatures obtained using different approaches were compared with ‘measured temperatures’, estimated from the depth of thermal damage observed on ground samples.
39 citations
"On grinding force ratio, specific e..." refers methods in this paper
...Although grinding temperature was not measured in the current study, it can be shown following the theoretical method adopted by Rowe and Jin (2001), Jin and Stephenson (2006) and Paul and Ghosh (2017) that the nanofluid aerosols are capable of further bringing down the average grinding zone…...
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