Roughness analysis of a concave surface as a function of machining parameters and strategies for AISI 420 steel

High-speed machining is widely applied for the processing of lightweight materials and also structural and tool steels. These materials are intensively used in the aerospace and the automotive industries. The advantages of high-speed machining lie not only in the speed of machining (lower costs and higher productivity) but also in attaining higher surface quality (prescribed surface roughness without surface defects). Based on this concept, in the present paper the high speed-dry turning of AISI O, (manganese-chromium-tungsten / W.-Nr. 1.2510) tool-steel specimens is reported. The influence of the main machining parameters i.e., cutting speed, feed rate and depth of cut on the resulted center-line average surface roughness (Ra) is examined. Types of wear phenomena occurred during the course of the present experimental study as well as tool wear patterns were also monitored.

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Experimental Investigation of Effects of Machining Parameters on Surface Roughness and Chip Formation of Aluminum Alloys by Face Turning

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.799-800.299 ◽

2015 ◽

Vol 799-800 ◽

pp. 299-306

Author(s):

Meshack Olygen Kusimba ◽

Seong Joo Choi

Keyword(s):

Surface Roughness ◽

Chip Formation ◽

Feed Rate ◽

Aluminium Alloys ◽

Spindle Speed ◽

Depth Of Cut ◽

Machining Parameters ◽

Atomic Force ◽

Roughness Analysis ◽

The Face

This paper investigates the effect of process parameters on surface roughness and chips formation in face turning of aluminium A2025 alloy international standard or A3035 alloy Korean standard using conventional lathe. The parameters namely the spindle speed, depth of cut and feed rate are varied to study their effect on surface roughness and chip characteristics. The experiments are conducted with all possible combination of factors in order to get the influence of every factor. The study reveals that the surface roughness is directly influenced by the spindle speed, depth of cut and feed rate. It is observed that the surface roughness increases with increased feed rate and depth of cut and is higher atlower speeds. The surface roughness analysis was done by atomic force microscope (AFM).The chips formed were continuous but varied in size and shape basing on the machining parameters. The depth of cut has no significant influence on the chips formation. The results shown here shows the ability of face turning method to test the surface roughness and chip formation on aluminium alloys. The face turning method used is simple and effective.

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Machining parameters optimization of surface roughness analysis for AA5083 – Boron carbide (B4C) composites

Materials Today Proceedings ◽

10.1016/j.matpr.2020.08.296 ◽

2020 ◽

Vol 33 ◽

pp. 4642-4645

Author(s):

S. Rajesh ◽

D. Chandramohan ◽

T. Sathish

Keyword(s):

Surface Roughness ◽

Boron Carbide ◽

Parameters Optimization ◽

Machining Parameters ◽

Roughness Analysis ◽

Machining Parameters Optimization ◽

Boron Carbide B4c

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Dependence of the joint configuration on the dynamic immobility fulcrum

Russian Osteopathic Journal ◽

10.32885/2220-0975-2019-1-2-108-114 ◽

2019 ◽

pp. 108-114

Author(s):

A. D. Kozlov ◽

Yu. P. Potekhina

Keyword(s):

Kinetic Energy ◽

Convex Surface ◽

The Other ◽

Concave Surface ◽

Joint Configuration ◽

Articular Surfaces

Although joints with synovial cavities and articular surfaces are very variable, they all have one common peculiarity. In most cases, one of the articular surfaces is concave, whereas the other one is convex. During the formation of a joint, the epiphysis, which has less kinetic energy during the movements in the joint, forms a convex surface, whereas large kinetic energy forms the epiphysis with a concave surface. Basing on this concept, the analysis of the structure of the joints, allows to determine forces involved into their formation, and to identify the general patterns of the formation of the skeleton.

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Performance Analysis on Eco-friendly Machining of Ti6Al4V using Powder Mixed with Different Dielectrics in WEDM

International Journal of Automotive and Mechanical Engineering ◽

10.15282/ijame.17.3.2020.06.0610 ◽

2020 ◽

Vol 17 (3) ◽

pp. 8128-8139

Author(s):

S. Chakraborty ◽

S. Mitra ◽

D. Bose

Keyword(s):

Metal Removal ◽

Removal Rate ◽

Machining Process ◽

Process Efficiency ◽

Machining Parameters ◽

Dielectric Fluids ◽

High Emission ◽

Pulse On Time ◽

Pulse Off Time ◽

Wedm Process

The recent scenario of modern manufacturing is tremendously improved in the sense of precision machining and abstaining from environmental pollution and hazard issues. In the present work, Ti6Al4V is machined through wire EDM (WEDM) process with powder mixed dielectric and analyzed the influence of input parameters and inherent hazard issues. WEDM has different parameters such as peak current, pulse on time, pulse off time, gap voltage, wire speed, wire tension and so on, as well as dielectrics with powder mixed. These are playing an essential role in WEDM performances to improve the process efficiency by developing the surface texture, microhardness, and metal removal rate. Even though the parameter’s influencing, the study of environmental effect in the WEDM process is very essential during the machining process due to the high emission of toxic vapour by the high discharge energy. In the present study, three different dielectric fluids were used, including deionised water, kerosene, and surfactant added deionised water and analysed the data by taking one factor at a time (OFAT) approach. From this study, it is established that dielectric types and powder significantly improve performances with proper set of machining parameters and find out the risk factor associated with the PMWEDM process.

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