Influence of minimum quantity of lubrication (MQL) when turning hardened SAE 1045 steel: a comparison with dry machining

2018 ◽  
Vol 98 (1-4) ◽  
pp. 959-968 ◽  
Author(s):  
Marco Aurélio Sampaio ◽  
Álisson Rocha Machado ◽  
Carlos Augusto Henning Laurindo ◽  
Ricardo Diego Torres ◽  
Fred Lacerda Amorim
Keyword(s):  
Dry Machining ◽  
Minimum Quantity ◽  
1045 Steel ◽  
Minimum Quantity Of Lubrication

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.

Identification of a Friction Model at the Tool-Chip-Workpiece Interface in Dry Machining of a AISI 1045 Steel With a TiN Coated Carbide Tool

2011 ◽  
Vol 133 (4) ◽  
Author(s):  
Hamdi Ben Abdelali ◽  
Cedric Courbon ◽  
Joël Rech ◽  
Wacef Ben Salem ◽  
Abdelwaheb Dogui ◽  
...  
Keyword(s):  
Friction Model ◽  
Carbide Tool ◽  
Dry Machining ◽  
Sliding Velocity ◽  
Partition Model ◽  
Heat Partition ◽  
Aisi 1045 Steel ◽  
Aisi 1045 ◽  
1045 Steel ◽  
Coated Carbide

The characterization of frictional phenomena at the tool-chip-workpiece interface in metal cutting remains a challenge. This paper aims at identifying a friction model and a heat partition model at this interface during the dry cutting of an AISI1045 steel with TiN coated carbide tools. A new tribometer, based on a modified pin-on-ring system, has been used in order to reach relevant values of pressures, temperatures, and sliding velocities. Additionally a 3D Arbitrary Lagrangian Eulerian model (A.L.E.) numerical model simulating the frictional test has been developed in order to extract local parameters around the spherical pin, such as average contact pressure, average local sliding velocity, and average contact temperature, from experimental macroscopic measurements. A large range of sliding velocities [0.083–5 m/s] has been investigated. It has been shown that friction coefficient and heat partition coefficient are mainly dependant on local sliding velocity at the interface. Three friction regimes have been identified. These experimental and numerical results provide a better understanding of the tribological phenomena along the tool-chip-workpiece interfaces in dry machining of an AISI 1045 steel with a TiN coated carbide tool. Finally a new friction model and heat partition model has been developed for implementation in a numerical cutting model.

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.

scholarly journals Sustainable Lubrication Methods for the Machining of Titanium Alloys: An Overview

Materials ◽  
2019 ◽  
Vol 12 (23) ◽  
pp. 3852 ◽  
Author(s):  
Enrique García-Martínez ◽  
Valentín Miguel ◽  
Alberto Martínez-Martínez ◽  
María Carmen Manjabacas ◽  
Juana Coello
Keyword(s):  
Titanium Alloys ◽  
Cutting Tool ◽  
Chemical Components ◽  
Thermal Gradients ◽  
Dry Machining ◽  
Machining Processes ◽  
Minimum Quantity ◽  
Modern Manufacturing ◽  
High Pressure Coolant ◽  
Very High

Titanium is one of the most interesting materials in modern manufacturing thanks to its good mechanical properties and light weight. These features make it very attractive for use in the aeronautical and aerospace industries. Important alloys, such as Ti6Al4V, are extensively used. Nevertheless, titanium alloys present several problems in machining processes. Their machinability is poor, affected by low thermal conductivity, which generates very high cutting temperatures and thermal gradients in the cutting tool. Lubricants and cutting fluids have traditionally been used to solve this problem. However, this option is unsustainable as such lubricants represent a risk to the environment and to the health of the operator due to their different chemical components. Therefore, novel, sustainable and green lubrication techniques are necessary. Dry machining is the most sustainable option. Nevertheless, difficult-to-machine materials like titanium alloys cannot be machined under these conditions, leading to very high cutting temperatures and excessive tool wear. This study is intended to describe, analyse and review the non-traditional lubrication techniques developed in turning, drilling and milling processes since 2015, including minimum quantity of lubricant, cryogenic lubrication, minimum quantity of cooling lubrication or high-pressure coolant. The aim is to provide a general overview of the recent advances in each technique for the main machining processes.

Sign in / Sign up

Export Citation Format

Share Document