Pre-cooling Intensity Effects on Cooling Efficiency in Cryogenic Turning

Musavi, Seyed Hasan; Davoodi, Behnam; Eskandari, Behzad

doi:10.1007/s13369-019-04056-6

Cited by 16 publications

(5 citation statements)

References 33 publications

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“…It is seen from figure 7 that higher cutting speed resulted in the increasing cutting tool-chip interface temperatures under all cutting and cooling conditions compared to lower cutting speed. This situation can be attributed to increased stress intensity in the primary deformation zone with the increasing cutting speed values leading to higher interface temperature [28]. Lower cutting temperatures were obtained both 20 kHz and 30 kHz in UAT compared to CT the dry cooling environment and at 50 m min −1 cutting speed.…”

Section: Resultsmentioning

confidence: 92%

Ultrasonic assisted turning of AISI 52100 steel using nanoparticle-MQL method

Ağar¹,

Tosun²

2021

Surf. Topogr.: Metrol. Prop.

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High cutting force and high cutting tool-chip interface temperature occur during machining of high strength materials like AISI 52100 by using conventional turning method and this makes to the difficult machining operation. Besides, in conventional turning (CT) of these materials, which has high abrasion resistance and hardness properties, an additional process such as grinding is required to achieve the desired surface quality. Ultrasonic assisted turning (UAT) method has been widely used in the machining industry in recent years, as it exhibits better surface quality, lower cutting forces, and cutting temperature than the CT method. This paper focused on experimentally and statistically determining the effects of different cutting parameters and cooling conditions (dry and minimum quantity lubrication-MQL) on surface roughness, workpiece surface texture, tangential direction cutting force, and cutting tool-workpiece interface temperature in the machining of AISI 52100 material by using UAT and CT methods. The experimental results revealed that significant improvements determined in the cutting forces and the surface roughness occurred in UAT compared to CT in all the cooling conditions. However, the increasing cutting speeds caused to observe higher interface temperature values in dry turning by the UAT method. Variance Analysis (ANOVA) was carried out to determine the significance grade of independent variables on dependent variables. According to ANOVA results, while the cutting speed is the most important factor on the surface roughness and the cutting zone temperature, and the cooling method is the most important factor on the cutting force. The effects of turning methods on corresponding surface topography, including surface defects, were evaluated. It is determined that in the surface topography analysis, feed marks are the main texture of the workpiece in the CT method while micro-level indentations and protrusions occurred on the workpiece surface in the UAT method.

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Section: Resultsmentioning

confidence: 92%

Ultrasonic assisted turning of AISI 52100 steel using nanoparticle-MQL method

Ağar¹,

Tosun²

2021

Surf. Topogr.: Metrol. Prop.

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“…Consequently, increased cutting force and decreased surface quality are expected. 42 Moreover, when the cutting tool starts to progress in the work part, the particles attached to the tool rake face remove its surface due to increased cutting temperature and heat softening. Also, in some cases, the second adhesion wear mechanism tends to remove a portion of the tool material from the tool face.…”

Section: Resultsmentioning

confidence: 99%

Eco-green machining of superalloy A286: Assessment of tool wear morphology and surface topology

Musavi

Davoodi

Niknam

2021

Proceedings of the Institution of Mechanical Engineers, Part B:

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Unstable crude oil derivatives are among the main substances added to the mineral-based lubricants (MBL). However, the high purification and disposal costs of such lubricants and consequent environmental difficulties are the major drawbacks of cutting fluid consumption. The lower use of MBL or replacing them with less harmful ones, in principle, vegetable-based lubricants (VBL) are the prime importance of achieving less operating costs and pollution. Furthermore, the use of VBLs is much more recommended if machinability aspects, including tool life, surface, and edge quality, would also be improved. Therefore, in the present study, cutting parameters and lubricant types were used as the experimental variables in the MQL-turning of A286 superalloy. A286 is classified as a difficult-to-cut material with a wide range of applications in the energy and turbine industries. No experimental study was found on the machining of A286 under separate cooling and lubrication with two MQL systems simultaneously. The effects of cutting parameters on both average surface roughness Ra and tool wear morphology were evaluated. Experimental results denoted that the use of VBLs led to better surface topology. On the other hand, the tendency of the built-up layer (BUL) and built-up edge (BUE) phenomenon were intensified when MBL was used. On the word, better tool life is also expected when using VBL. This observation revealed that the use of VBL not only tends to improve productivity and environmental safety aspects but also machinability aspects; in principle, better surface topology and longer tool life are also expected.

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“…Accordingly, higher values of the flow of pure-MQL had an affirmative contribution to the surface quality. Musavi et al [21] measured the impact of pre-cooling by applying cryogenic treatment and compared the test results with the dry medium. Based on the findings, it was stated that cryogenic assisted turning was better than drought environment in obtaining surface quality, wear mechanism and temperature while cutting AA2024 alloy.…”

Section: Introductionmentioning

confidence: 99%

Studies on Geometrical Features of Tool Wear and Other Important Machining Characteristics in Sustainable Turning of Aluminium Alloys

Gupta

Niesłony

Sarıkaya

et al. 2023

Int. J. of Precis. Eng. and Manuf.-Green Tech.

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The aerospace and automotive industries make extensive use of aluminium and its alloys. Contrarily, machining of aluminium (Al) alloys presents a number of difficulties, including, but not limited to, poor surface finishing, excessive tool wear, decreased productivity etc. Therefore, it’s very important to measure the machining characteristics during machining of aluminium alloy with sustainable cooling strategies. In this work, a new approach of measurement was adopted to measure the critical geometrical aspects of tool wear, surface roughness, power consumption and microhardness while machining AA2024-T351 alloy under dry, minimum quantity lubrication (MQL), liquid nitrogen (LN2) and carbon dioxide (CO2) cooling conditions. Initially, the various aspects of tool wear were studied with the help of Sensofar Confocal Microscope integrated with Mountains map software and then, the other results such as surface roughness, power consumption and microhardness were measured as per the ISO standards. The outcome of these measurement studies confirms that LN2 and CO2 cooling is helpful in improving the machining characteristics of AA2024-T351 alloy. When compared to dry conditions, the surface roughness values of MQL, LN2, and CO2 all have values that are lowered by 11.90%, 30.95%, and 39.28% respectively, and also power consumption values were lowered by 3.11%, 6.46% and 11.5% for MQL, CO2 and LN2 conditions, respectively.

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Pre-cooling Intensity Effects on Cooling Efficiency in Cryogenic Turning

Cited by 16 publications

References 33 publications

Ultrasonic assisted turning of AISI 52100 steel using nanoparticle-MQL method

Ultrasonic assisted turning of AISI 52100 steel using nanoparticle-MQL method

Eco-green machining of superalloy A286: Assessment of tool wear morphology and surface topology

Studies on Geometrical Features of Tool Wear and Other Important Machining Characteristics in Sustainable Turning of Aluminium Alloys

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