The Influence of the Application of EP Additive in the Minimum Quantity Cooling Lubrication Method on the Tool Wear and Surface Roughness in the Process of Turning 316L Steel

2018 ◽  
pp. 254-263
Author(s):  
Radoslaw W. Maruda ◽  
Stanislaw Legutko ◽  
Jolanta B. Krolczyk ◽  
Szymon Wojciechowski ◽  
Wlodzimierz Kot
Keyword(s):  
Surface Roughness ◽  
Tool Wear ◽  
Minimum Quantity ◽  
316L Steel ◽  
Ep Additive

Application of tri-hybridized carbonaceous nanocutting fluids in an end milling operation by the minimum quantity lubrication technique

2021 ◽  
pp. 135065012110438
Author(s):  
S. Vignesh ◽  
U. Mohammed Iqbal
Keyword(s):  
Surface Roughness ◽  
Tool Wear ◽  
End Milling ◽  
Hexagonal Boron Nitride ◽  
Coconut Oil ◽  
Minimum Quantity Lubrication ◽  
Work Piece ◽  
Cutting Fluids ◽  
Minimum Quantity ◽  
Milling Operations

This paper is concentrated on the exploration of carbonaceous nanocutting fluids with the concept of tri-hybridization with improved lubricative and cooling properties by using multi-walled carbon nanotubes, hexagonal boron nitride , and graphene nanoparticles with neat cold-pressed coconut oil in a fixed volumetric proportion. The rheological properties of the nanofluids were studied to assess their performance in real-time end milling operations using an AA7075 work piece on a CNC lathe machine under a minimum quantity lubrication environment. At the outset, the carbonaceous nanofluids gave good performance when compared to conventional cutting fluids. Furthermore, the surfaces of the tribo-pairs and the chips formed were analyzed using a profilometer and high-end microscopes. The results obtained from the experiments confirm that the tri-hybridized carbonaceous nanolubricant has reduced the cutting force, tool wear, and surface roughness when correlated to monotype nanofluids. The scanning electron microscope images of the surface and tool were studied and it was found that the surface quality was maintained while end milling with tri-hybridized carbonaceous nanofluid. Improvement of ∼17%, 20% and 25% in cutting forces, surface roughness and tool wear was found in tri-hybrid fluid when compared to other fluids. Thus, the present work indicates that the addition of carbon-based nanoparticles with coconut oil has offered better performance and is found to be a credible alternative to existing conventional cutting fluids.

scholarly journals Performance Assessment of Minimum Quantity Castor-Palm Oil Mixtures in Hard-Milling Operation

Materials ◽  
2021 ◽  
Vol 14 (1) ◽  
pp. 198
Author(s):  
Binayak Sen ◽  
Munish Kumar Gupta ◽  
Mozammel Mia ◽  
Danil Yurievich Pimenov ◽  
Tadeusz Mikołajczyk
Keyword(s):  
Surface Roughness ◽  
Tool Wear ◽  
Palm Oil ◽  
Castor Oil ◽  
Volume Fraction ◽  
Volume Ratio ◽  
Specific Cutting Energy ◽  
Minimum Quantity ◽  
Cutting Energy ◽  
Cooling Effects

The necessity to progress towards sustainability has inspired modern researchers to examine the lubrication and cooling effects of vegetable oils on conventional metal cutting operations. Consequently, as an eco-friendly vegetable product, castor oil can be the right choice as Minimum quantity lubrication (MQL) base fluid. Nonetheless, the high viscosity of castor oil limits its flowability and restricts its industrial application. Conversely, palm oil possesses superior lubricity, as well as flowability characteristics. Hence, an attempt has been made to improve the lubrication behavior of castor oil. Here, six castor-palm mixtures (varying from 1:0.5–1:3) were utilized as MQL-fluid, and the values of machining responses viz. average surface roughness, specific cutting energy, and tool wear were evaluated. Furthermore, an integrated Shannon’s Entropy-based Technique for order preference by similarity to ideal solution (TOPSIS) framework was employed for selecting the most suitable volume ratio of castor-palm oil mixture. The rank provided by the TOPSIS method confirmed that 1:2 was the best volume ratio for castor-palm oil mixture. Afterward, a comparative analysis demonstrated that the best castor-palm volume fraction resulted in 8.262 and 16.146% lowering of surface roughness, 5.459 and 7.971% decrement of specific cutting energy, 2.445 and 3.155% drop in tool wear compared to that of castor and palm oil medium, respectively.

Evaluation and comparison of lubrication methods in finish machining of hardened steel mould inserts

2015 ◽  
Vol 231 (14) ◽  
pp. 2458-2467 ◽  
Author(s):  
Yuk Lun Chan ◽  
Xun Xu
Keyword(s):  
Surface Roughness ◽  
Tool Wear ◽  
Feed Rate ◽  
Minimum Quantity Lubrication ◽  
Hardened Steel ◽  
Depth Of Cut ◽  
Machining Time ◽  
Minimum Quantity ◽  
Step Over ◽  
Steel Mould

Traditionally, metal cutting fluid or lubricant is used in finishing operations of high-speed machining process to reduce the rate of tool wear, which in turn will improve surface quality. In automobile and aerospace industries, minimum quantity lubrication technique is considered to provide the same level of performance as the flood coolant method and offers financial benefits by saving coolant direct and associated costs. However, scant research work has been done on minimum quantity lubrication applications in the die and mould manufacturing industry. In this study, the effects of dry, flood and minimum quantity lubrication machining on surface roughness, tool wear, dimensional accuracy and machining time of hardened steel mould inserts were compared. The results revealed that there were no significant differences between these three lubrication methods. More in-depth experimental study of dry and minimum quantity lubrication machining was then carried out using the design of experiments technique. In terms of surface roughness and tool wear, there were again no significant differences. Nevertheless, minimum quantity lubrication machining produced more accurate results than dry machining in dimensional deviation. The regression models show that feed-rate ( fz) has a larger effect on surface roughness and machining time than step-over ( ae), while depth of cut ( ap) has no significant effect on surface roughness. Based on the test piece shape, a shortest possible machining time of 3.55 h and a good surface finish of 0.28 µm can be achieved using a small feed-rate (0.03 mm/tooth), a large step-over (0.1 mm) and a large depth of cut (0.2 mm). This work shows that when combining the minimum quantity lubrication technique with the right cutting conditions in modern die and mould manufacturing, machining time and polishing time can be saved, which leads to an overall saving in production cost. Using the dry and minimum quantity lubrication techniques for different finish machining situations can therefore be a good economical solution.

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