Behavior of hardened steel grinding using MQL under cold air and MQL CBN wheel cleaning

Lopes, José Cláudio; Fragoso, Kamira Miksa; Garcia, Mateus Vinícius; Ribeiro, Fernando Sabino Fonteque; Francelin, Alan Polato; Sanchez, Luiz Eduardo de Ângelo; Rodrigues, Alessandro Roger; Mello, Hamilton José de; Aguiar, Paulo Roberto de; Bianchi, Eduardo Carlos

doi:10.1007/s00170-019-04571-8

Cited by 51 publications

(6 citation statements)

References 29 publications

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“…Micro lubricating oil is dissolved in scCO 2 to form a high-pressure scCO 2 -oil fluid, which will rapidly expand after ejection from the nozzle, resulting in rapid lubricating oil precipitation due to supersaturation and the formation of micron-sized oil mist particles. Simultaneously, scCO 2 oil fluid forms gaseous CO 2 /lubricating oil mist/dry ice particle three-phase jet under the Joule-Thomson effect, and the temperature can be as low as −78.5 °C, which substantially reduces the temperature of the cutting zone and plays a lubrication role [52]. scCO 2 + MQL technology is currently in the stage of laboratory research due to its complex production, complex storage, and high cost.…”

Section: Ln 2 + Mql Technologymentioning

confidence: 99%

“…[196] with permission from Elsevier. [52,201,206,207] for end-mills. LN 2 is used to circulate in the internal spiral channel of a certain diameter milling cutter, and the milling cutter is maintained in the cryogenic range of −100 °C to −140 °C by phase change heat absorption to transfer the heat in the cutting zone quickly and reduce workpiece temperature.…”

Section: Application Effect Of Cmqlmentioning

confidence: 99%

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Cryogenic minimum quantity lubrication machining: from mechanism to application

et al. 2021

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Cutting fluid plays a cooling-lubrication role in the cutting of metal materials. However, the substantial usage of cutting fluid in traditional flood machining seriously pollutes the environment and threatens the health of workers. Environmental machining technologies, such as dry cutting, minimum quantity lubrication (MQL), and cryogenic cooling technology, have been used as substitute for flood machining. However, the insufficient cooling capacity of MQL with normal-temperature compressed gas and the lack of lubricating performance of cryogenic cooling technology limit their industrial application. The technical bottleneck of mechanical—thermal damage of difficult-to-cut materials in aerospace and other fields can be solved by combining cryogenic medium and MQL. The latest progress of cryogenic minimum quantity lubrication (CMQL) technology is reviewed in this paper, and the key scientific issues in the research achievements of CMQL are clarified. First, the application forms and process characteristics of CMQL devices in turning, milling, and grinding are systematically summarized from traditional settings to innovative design. Second, the cooling-lubrication mechanism of CMQL and its influence mechanism on material hardness, cutting force, tool wear, and workpiece surface quality in cutting are extensively revealed. The effects of CMQL are systematically analyzed based on its mechanism and application form. Results show that the application effect of CMQL is better than that of cryogenic technology or MQL alone. Finally, the prospect, which provides basis and support for engineering application and development of CMQL technology, is introduced considering the limitations of CMQL.

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Section: Ln 2 + Mql Technologymentioning

confidence: 99%

Section: Application Effect Of Cmqlmentioning

confidence: 99%

Cryogenic minimum quantity lubrication machining: from mechanism to application

et al. 2021

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“…Hence, the surface quality deteriorated as the depth of cut was increased. Figures 8,9,10,11,12, and 13 present the surface morphology of the workpieces from dry machining condition with the depth of cut of 0.5, 1.0, 1.5, 2.0, 2.5, 3.0 mm, respectively. Similar trend of results to compressed air machining condition was observed in the dry machining conditions.…”

Section: Surface Morphology Of the Workpiecementioning

confidence: 99%

“…Sequel to these assertions, various studies have focused on the application of compressed air in grinding. These include Choi et al [9], Choi et al [10], Oliveira et al [11], and Lopez et al [12]. They looked at the characteristics exhibited during the grinding of hardened steel under minimum quantity lubrication (MQL) and wheel cleaning jet (WCJ).…”

Section: Introductionmentioning

confidence: 99%

Evaluation of surface grinding of AISI 304 stainless steel using dry and compressed air cooling techniques

et al. 2021

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The abundant use of cutting fluids in surface grinding process and the corresponding costs and energy consumption have been a major sustainability concern. This paper identified the optimum depth of cut for surface grinding under controlled grinding parameters using compressed air cooling technique and dry cutting. The surface morphology and subsurface defects of the workpiece material (AISI 304 stainless steel) were measured and compared. It was observed that lower depth of cut had a better surface morphology than higher depth of cut. The effects of compressed air on tool life were equally evaluated. The heat dissipations on the grinding wheels were observed and analysed for both grinding conditions. In addition, the influence of compressed air on the surface integrity of the workpiece was also investigated. The results showed that lower depth of cut proved to have a better quality surface compared to higher depth of cut.

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“…Dry grinding is one of the processes that is used for these purposes. It is known to induce subsurface modifications characterized by macroscopic defects, including roughness, abrasion, and scratches [10,11]. Besides, this type of surface treatment leads to local dissipation Metals 2021, 11, 135 2 of 14 of energy and matter, accompanied by a poorly controlled temperature increase and cooling, which in part leads to a strong residual compressive stress [12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Effect of Mechanical Surface Treatments on the Surface State and Passive Behavior of 304L Stainless Steel

Jaffré

Ter‐Ovanessian

Abe

et al. 2021

Metals

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The effect of dry grinding on 304L stainless steel’s passive behavior is compared to two other surface finishing (mechanical polishing down to 2400 with SiC emery paper and 1 µm with diamond paste, respectively). The characterization of the surface state was performed using scanning electron microscopy, transmission electron microscopy, 3D optical profilometer, and X-ray diffraction. Results indicate that each surface treatment leads to different surface states. The ground specimens present an ultrafine grain layer and a strong plastic deformation underneath the surface, while an ultrafine grain layer characterizes the subsurface of the polished specimens. Grinding induces high residual compressive stresses and high roughness compared to polishing. The characterization of the passive films was performed by electrochemical impedance spectroscopy and Mott–Schottky analysis. The study shows that the semiconductor properties and the thickness of the passive films are dependent on the surface state of the 304L stainless steel.

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Behavior of hardened steel grinding using MQL under cold air and MQL CBN wheel cleaning

Cited by 51 publications

References 29 publications

Cryogenic minimum quantity lubrication machining: from mechanism to application

Cryogenic minimum quantity lubrication machining: from mechanism to application

Evaluation of surface grinding of AISI 304 stainless steel using dry and compressed air cooling techniques

Effect of Mechanical Surface Treatments on the Surface State and Passive Behavior of 304L Stainless Steel

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