A Gower TOPSIS Method For Optimization Of Machining Parameters Of Nimonic 80A Under Cryogenic Cooling And Minimum Quantity Lubrication

2020 ◽  
Vol 5 (1) ◽  
pp. 20010390-20010390
Author(s):  
V. Anandan
Keyword(s):  
Minimum Quantity Lubrication ◽  
Cryogenic Cooling ◽  
Machining Parameters ◽  
Topsis Method ◽  
Minimum Quantity ◽  
Nimonic 80A

Flank-milling of Integral Blade Rotors made in Ti6Al4V using cryo CO2 and Minimum Quantity Lubrication (MQL)

2021 ◽  
pp. 1-16
Author(s):  
Haizea Gonzalez ◽  
Octavio Pereira ◽  
Luis Norberto López de Lacalle ◽  
Amaia Calleja ◽  
Izaro Ayesta ◽  
...  
Keyword(s):  
Gas Turbines ◽  
Cutting Tools ◽  
Minimum Quantity Lubrication ◽  
Cryogenic Cooling ◽  
Flank Milling ◽  
New Device ◽  
Minimum Quantity ◽  
Cutting Zone ◽  
Oil Emulsions ◽  
Pcd Tools

Abstract This paper presents the machining of Ti6Al4V Integral Blade Rotors (IBR) using CO2 as cryogenic cooling. This kind of component is typical in gas turbines, pumps and other rotary machines. Flank milling technique using diamond polycrystalline (PCD) tools using CO2 and Minimum Quantity Lubrication (MQL), denominated CryoMQL, is an alternative to conventional oil emulsions. The proposed approach implies a balance between technical and environmental issues, and it makes feasible the use PCD tools avoiding the high temperature reactivity of Ti6Al4V alloy with this type of cutting tools. CO2 must be supplied and injected onto the cutting zone, avoiding the risks of dry ice formation and clogging of both pipes and nozzles. For this purpose, a new device for CO2 delivery was developed, using gas and liquid CO2.

Investigations on Surface Roughness Measurement in Minimum Quantity Lubrication Turning of Titanium Alloys Using Response Surface Methodology and Box–Cox Transformation

2016 ◽  
Vol 16 (2) ◽  
pp. 75-88 ◽  
Author(s):  
Munish Kumar Gupta ◽  
P. K. Sood ◽  
Vishal S. Sharma
Keyword(s):  
Surface Roughness ◽  
Response Surface Methodology ◽  
Response Surface ◽  
Flow Rate ◽  
Feed Rate ◽  
Cutting Speed ◽  
Minimum Quantity Lubrication ◽  
Machining Parameters ◽  
Minimum Quantity ◽  
Box Cox Transformation

AbstractIn the present work, an attempt has been made to establish the accurate surface roughness (Ra, Rq and Rz) prediction model using response surface methodology with Box–Cox transformation in turning of Titanium (Grade-II) under minimum quantity lubrication (MQL) conditions. This surface roughness model has been developed in terms of machining parameters such as cutting speed, feed rate and approach angle. Firstly, some experiments are designed and conducted to determine the optimal MQL parameters of lubricant flow rate, input pressure and compressed air flow rate. After analyzing the MQL parameter, the final experiments are performed with cubic boron nitride (CBN) tool to optimize the machining parameters for surface roughness values i. e., Ra, Rq and Rz using desirability analysis. The outcomes demonstrate that the feed rate is the most influencing factor in the surface roughness values as compared to cutting speed and approach angle. The predicted results are fairly close to experimental values and hence, the developed models using Box-Cox transformation can be used for prediction satisfactorily.

A Parametric Analysis on Micro-Drilling Process With Nanofluid Minimum Quantity Lubrication

2013 ◽  
Author(s):  
Jung Soo Nam ◽  
Dae Hoon Kim ◽  
Sang Won Lee
Keyword(s):  
Feed Rate ◽  
Parametric Analysis ◽  
Large Diameter ◽  
Minimum Quantity Lubrication ◽  
Drilling Process ◽  
Machining Parameters ◽  
Minimum Quantity ◽  
Micro Drilling ◽  
Nanofluid Minimum Quantity Lubrication ◽  
Thrust Forces

This paper presents a parametric analysis on microdrilling process using nanofluid minimum quantity lubrication (MQL). In this paper, the effects of several machining parameters such as a feed rate, rotational speed and drill diameter on micro drilling performances are investigated under various lubrication conditions — compressed air lubrication, pure MQL and nanofluid MQL. For nanofluid MQL, nanodiamond particles are used with the volumetric concentration of 4 %. A series of microdrilling experiments are carried out in the miniaturized machine tool system. The experimental results show the nanofluid MQL can be effective for reducing average drilling torques and thrust forces, in particular, at relatively low feed rate (10 mm/min) and low spindle speed (30,000 RPM) in the case using the drill with small diameter (0.1 mm). Meanwhile, in the case using the drill with large diameter (0.5 mm), the nanofluid MQL may not be effective for reducing average torques and thrust forces.

Study on Surface Roughness in Minimum Quantity Lubrication Turning of Al-6082/SiC Metal Matrix Composites

2019 ◽  
Vol 895 ◽  
pp. 127-133 ◽  
Author(s):  
C.J. Vishwas ◽  
M. Naik Gajanan ◽  
B. Sachin ◽  
Roy Abhinaba ◽  
N.P. Puneet ◽  
...  
Keyword(s):  
Surface Roughness ◽  
Metal Matrix Composites ◽  
Feed Rate ◽  
Metal Matrix ◽  
Minimum Quantity Lubrication ◽  
Spindle Speed ◽  
Depth Of Cut ◽  
Machining Parameters ◽  
Matrix Composites ◽  
Minimum Quantity

Aluminum-based metal matrix composites (MMCs) have been suggested due to intense interest from automobile, marine, aerospace and other structural applications owing to their balanced mechanical, physical and chemical properties. MMCs are manufactured in order to meet present demand such as low material density, high mechanical strength and higher wear resistance of the component. Generally,MMCs tend to form rougher surface during machining because of the abrasive nature of hard ceramic particles present in them. Stir casting technique was used for fabrication of this composite which ensures better homogeneity.Furthermore, an attempt has been made in this paper to examine the results on the surface roughness of Al-6082/SiC metal matrix composites (containing 0%, 5% and 10% SiC particles).Focus was spent on parametric optimization of these composites in order to achieve cost-effective machining limits. The machining parameter studies have been carried out through the design of experiments (DoE) under minimum quantity lubrication (MQL) condition and effect of machining parameters such as spindle speed, feed rate and depth of cut on surface roughness was investigated to analyze the influence of reinforcement on surface roughness. In addition, analysis of variance was studied to obtain percentage contribution of machining parameters involved. Also, the surface morphology of the machined surface was studied through a scanning electron microscope (SEM). Distribution of SiC in aluminum alloy is fairly uniform with few clusters. Results of the experiments revealed that most significant turning parameter for surface roughness was spindle speed followed by feed rate and depth of cut. Furthermore, an optimal setting parameter for getting lower surface roughness was presented in confirmation table.

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