Investigation on the tool worn surface morphology and machining characteristics of the Hardox steel using minimum quantity lubrication

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
L. Mamundi Azaath ◽  
U. Natarajan
Keyword(s):  
Cubic Boron Nitride ◽  
Critical Role ◽  
Minimum Quantity Lubrication ◽  
Machining Process ◽  
Dry Machining ◽  
Minimum Quantity ◽  
Coated Tool ◽  
Tool Surface ◽  
Worn Surface ◽  
Machining Characteristics

Abstract In recent years, minimum quantity lubrication machining has played a critical role in extending tool life, improving surface finish, and reducing tool wear during the machining of hardened steel. The reported investigation involved the utility of Hardox 500 steel for the machining process while the cubic boron nitride coated tool performed the function of removing the material. The investigation was carried out by adopting two different techniques to predict the responses, viz., the response surface methodology and the artificial neural network. These techniques have been employed to predict the possible responses in investigating machining characteristics. Also, due consideration has been made concerning the reduction of tool-tip temperature and surface roughness. The entire investigation was carried out using three different environments. They are dry machining, wet, and minimum quantity lubrication. A scanning electron microscope was used for examining the morphology of the worn tool surface.

A Review of Minimum Quantity Lubrication (MQL) based on Bibliometry

2020 ◽  
Vol 13 ◽  
Author(s):  
Gaurav Gaurav ◽  
Abhay Sharma ◽  
G S Dangayach ◽  
M L Meena
Keyword(s):  
Descriptive Analysis ◽  
Minimum Quantity Lubrication ◽  
Citation Network ◽  
Machining Process ◽  
Cutting Fluid ◽  
Future Research ◽  
Research Directions ◽  
Minimum Quantity ◽  
Research Areas ◽  
Future Research Directions

Background: Minimum quantity lubrication (MQL) is one of the most promising machining techniques that can yield a reduction in consumption of cutting fluid more than 90 % while ensuring the surface quality and tool life. The significance of the MQL in machining makes it imperative to consolidate and analyse the current direction and status of research in MQL. Objective: This study aims to assess global research publication trends and hot topics in the field of MQL among machining process. The bibliometric and descriptive analysis are the tools that the investigation aims to use for the data analysis of related literature collected from Scopus databases. Methods: Various performance parameters are extracted, such as document types and languages of publication, annual scientific production, total documents, total citations, and citations per article. The top 20 of the most relevant and productive sources, authors, affiliations, countries, word cloud, and word dynamics are assessed. The graphical visualisation of the bibliometric data is presented in terms of bibliographic coupling, citation, and co-citation network. Results: The investigation reveals that the International Journal of Machine Tools and Manufacture (2611 citations, 31 hindex) is the most productive journal that publishes on MQL. The most productive institution is the University of Michigan (32 publications), the most cited country is Germany (1879 citations), and the most productive country in MQL is China (124 publications). The study shows that ‘Cryogenic Machining’, ‘Sustainable Machining’, ‘Sustainability’, ‘Nanofluid’ and ‘Titanium alloy’ are the most recent keywords and indications of the hot topics and future research directions in the MQL field. Conclusion: The analysis finds that MQL is progressing in publications and the emerging with issues that are strongly associated with the research. This study is expected to help the researchers to find the most current research areas through the author’s keywords and future research directions in MQL and thereby expand their research interests.

Study on the Effects of Abrasive and Coolant-Lubricant Types on Minimum Quantity Lubrication-MQL Grinding

2011 ◽  
Vol 325 ◽  
pp. 231-237 ◽  
Author(s):  
Taghi Tawakoli ◽  
M.J. Hadad ◽  
A. Daneshi ◽  
M.H. Sadeghi ◽  
B. Sadeghi
Keyword(s):  
Surface Quality ◽  
Minimum Quantity Lubrication ◽  
Dry Machining ◽  
Grinding Forces ◽  
Minimum Quantity ◽  
Mql Grinding ◽  
Air Jet ◽  
Dry Grinding ◽  
Surface Damages ◽  
Minimum Quantity Lubricant

In dry grinding, as there is no coolant lubricant to transfer the heat from the contact zone, generation of surface damages are not preventable. Promising alternatives to conventional flood coolant applications are also Minimum Quantity Lubricant (MQL) or Near Dry Machining (NDM) or Semi Dry Machining (SDM). This research has been conducted to study the influence of the abrasive and coolant-lubricant types on the minimum quantity lubrication (MQL) grinding performance. One type of CBN and three types of conventional wheels (corundum) were tested. The tests were carried out in presence of fluid, air jet and eleven types of coolant-lubricants, as well as in dry condition. The results indicate that the finest surface quality and the lowest grinding forces could be obtained when grinding with CBN wheels. In the case of conventional wheels, the coarser wheel induces much proper grinding results.

Performance of Low Cost 3D Printed Minimum Quantity Lubrication Applicator Using Palm Oil in Milling Steel

2020 ◽  
Vol 997 ◽  
pp. 85-92
Author(s):  
Abang Mohammad Nizam Abang Kamaruddin ◽  
Abdullah Yassin ◽  
Shahrol Mohamaddan ◽  
Syaiful Anwar Rajaie ◽  
Muhammad Isyraf Mazlan ◽  
...  
Keyword(s):  
Tool Wear ◽  
Cutting Forces ◽  
Cutting Tool ◽  
Low Cost ◽  
Minimum Quantity Lubrication ◽  
Machining Process ◽  
Cutting Condition ◽  
Dry Cutting ◽  
Minimum Quantity ◽  
Tool Performance

One of the most significant factors in machining process or metal cutting is the cutting tool performance. The rapid wear rate of cutting tools and cutting forces expend due to high cutting temperature is a critical problem to be solved in high-speed machining process, milling. Near-dry machining such as minimum quantity lubrication (MQL) is regarded as one of the solutions to solve this problem. However, the function of MQL in milling process is still uncertain so far which prevents MQL from widely being utilized in this specific machining process. In this paper, the mechanism of cutting tool performance such as tool wear and cutting forces in MQL assisted milling is investigated more comprehensively and the results are compared in three different cutting conditions which is dry cutting, wet cutting (flooding) and MQL. The MQL applicator is constructed from a household grade low-cost 3D printing technique. The chips surface of chips formation in each cutting condition is also observed using Scanning Electron Microscopy (SEM) machine. It is found out that wet cutting (flooding) is the best cutting performance compare to MQL and dry cutting. However, it can also be said that wet cutting and MQL produced almost the same value of tool wear and cutting forces as there is negligible differences in average tool wear and cutting forces between them based on the experiment conducted.

Experimental Results on Lamellar-Type Solid Lubricants in Enhancing Minimum Quantity Lubrication Machining

2016 ◽  
Vol 138 (10) ◽  
Author(s):  
Trung Kien Nguyen ◽  
Kyung-Hee Park ◽  
Patrick Y. Kwon
Keyword(s):  
Vegetable Oil ◽  
Solid Lubricant ◽  
Minimum Quantity Lubrication ◽  
Solid Lubricants ◽  
Machining Process ◽  
Minimum Quantity ◽  
Aspect Ratios ◽  
Significant Difference ◽  
1045 Steel ◽  
Lamellar Type

This paper studies the effect of various lamellar-type solid lubricants (graphite and hBN) that can be mixed into a lubricant to potentially improve the machinability of minimum quantity lubrication (MQL) machining. To examine this, the solid lubricants are classified into particles and platelets based on their aspect ratios as well as their respective sizes. In particular, the particles are classified into microparticles and nanoparticles based on their dimensions (average radius), while the platelets were classified, based on their average thickness, into two types: the “microplatelets” if the thickness is typically up to few tens of microns and the “nanoplatelets” if the thickness is well below a tenth of a micron (even down to few nanometers). Our previous work has shown that the mixture of an extremely small amount (about 0.1 wt. %) of the graphitic nanoplatelets and vegetable oil immensely enhanced the machinability of MQL machining. In this paper, many lubricants, each mixed with a particular variety of nano- or micro-platelets or one type of nanoparticles, were studied to reveal the effect of each solid lubricant on MQL machining. Prior to the MQL machining experiment, the tribological test was conducted to show that the nanoplatelets are overall more effective than the microplatelets and nanoparticles in minimizing wear despite of no significant difference in friction compared to pure vegetable oil. Consequently, the MQL ball-milling experiment was conducted with AISI 1045 steel yielding a similar trend. Surprisingly, the oil mixtures with the microplatelets increased flank wear, even compared to the pure oil lubricant when the tools with the smooth surface were used. Thus, the nanoscale thickness of these platelets is a critical requirement for the solid lubricants in enhancing the MQL machining process. However, maintaining the nanoscale thickness is not critical with the tools with the rough surfaces in enhancing the MQL process. Therefore, it is concluded that finding an optimum solid lubricant depends on not only the characteristics (material as well as morphology) of solid lubricants but also the characteristic of tool surface.

scholarly journals Perbedaan Distribusi Kekerasan Metode Minimum Quantity Lubrication (MQL) dan Metode Wet Machining Pada Material Al-Zn

2020 ◽  
Vol 5 (1) ◽  
pp. 42-50
Author(s):  
Wildan Shofiyandi ◽  
Heri Yudiono
Keyword(s):  
Quantitative Research ◽  
Minimum Quantity Lubrication ◽  
Experimental Methods ◽  
Descriptive Statistics ◽  
Observation Data ◽  
Dry Machining ◽  
Delivery Methods ◽  
Minimum Quantity ◽  
Analysis Techniques ◽  
Coolant Delivery

This study aims to determine the influence of three different coolant delivery methods, namely dry machining, Minimum Quantity Lubrication (MQL), and wet machining. This is quantitative research with the use of experimental methods. Data were collected through observation. Data analysis techniques being used was descriptive statistics. In MQL methods, the use of coolant is minimized by mixing it with high-pressurized air. It is shown from the obtained data that the use of MQL methods is not as good as the wet machining. The hardness distribution of wet machining method is lower than the MQL. This was observed from the machining chips of the two methods. The chips from the MQL method were darker than the wet machining method. This finding showed that the heat generated from the MQL was higher than that of wet machining. The Al and Zn bonds in the MQL method is considered to be denser.Penelitian ini bertujuan untuk mengetahui seberapa besar pengaruh penggunaan metode pemberian coolant yang berbeda, 3 metode yang digunakan adalah metode dry machining, Minimum Quantity Lubrication (MQL), dan wet machining.  Penelitian ini termasuk jenis penelitian kuantitatif dan menggunakan metode eksperimen. Untuk teknik pengumpulan data menggunakan metode observasi dan teknik analisis data menggunakan teknik analisis statistik deskriptif. Metode MQL merupakan metode yang digunakan untuk meminimalisir penggunaan coolant dengan mencampurkannya dengan udara bertekanan tinggi. Data yang didapat menunjukkan bahwa penggunaan metode MQL belum sebaik penggunaan metode wet machining. Distribusi kekerasan metode wet machining lebih rendah daripada MQL. Hal tersebut dapat terlihat dari geram yang dihasilkan oleh kedua penggunaan metode tersebut, geram yang dihasilkan dari metode MQL lebih gelap daripada metode wet machining. Hal tersebut menunjukkan bahwa, panas yang dihasilkan dari metode MQL lebih tinggi daripada panas yang dihasilkan dari metode wet machining panas tersebut mempengaruhi ikatan Al dan Zn pada metode MQL menjadi lebih rapat.

Temperature of Grinding Carbide with Castor Oil-based MoS2 Nanofluid Minimum Quantity Lubrication

2021 ◽  
pp. 1-30
Author(s):  
Menghua Sui ◽  
Changhe Li ◽  
Wentao Wu ◽  
Min Yang ◽  
Hafiz Muhammad Ali ◽  
...  
Keyword(s):  
Working Conditions ◽  
Minimum Quantity Lubrication ◽  
Grinding Force ◽  
Cemented Carbide ◽  
Machining Process ◽  
Minimum Quantity ◽  
Lubrication Performance ◽  
Nanofluid Minimum Quantity Lubrication ◽  
G Ratio ◽  
Specific Grinding Force

Abstract Nanofluid minimum quantity lubrication (NMQL) has better stability, higher thermal conductivity, and excellent lubrication performance compared with traditional flood lubrication. The heat transfer model and finite difference model were established to verify the feasibility of NMQL conditions in grinding cemented carbide. Based on them, the grinding temperature of cemented carbide is calculated numerically. Results show that the grinding zone temperatures of flood grinding and NMQL are lower, 85.9 °C and 143.2 °C, respectively. Surface grinding experiments of cemented carbide YG8 under different working conditions are carried out. Dry grinding (227.2 °C) is used as the control group. Grinding zone temperatures of flood grinding, minimum quantity lubrication, and NMQL decrease by 64.2%, 39.5%, and 20.4% respectively. The error is 6.3% between theoretical calculation temperature and experimental measurement temperature. Based on machining process parameters (specific grinding force, force ratio) and experimental results (microstructure of grinding wheel, workpiece, and grinding debris), the effects of different working conditions on wheel wear are studied. NMQL achieves the highest G ratio of 6.45, the smallest specific grinding force, and the smallest Fn/Ft ratio of 2.84, which further proves that NMQL is suitable for grinding cemented carbide.

A review of near dry machining/minimum quantity lubrication machining of difficult to machine alloys

2016 ◽  
Vol 18 (3) ◽  
pp. 213 ◽  
Author(s):  
Talwinder Singh ◽  
Pragat Singh ◽  
J.S. Dureja ◽  
Manu Dogra ◽  
Harwinder Singh ◽  
...  
Keyword(s):  
Minimum Quantity Lubrication ◽  
Dry Machining ◽  
Minimum Quantity
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