Study on Electrochemical Effects Assisted Magnetic Abrasive Finishing for Finishing Stainless Steel SUS304

2021 ◽  
Author(s):  
Xu Sun ◽  
Yongjian Fu ◽  
Wei Lu ◽  
Wei Hang
Keyword(s):  
Surface Roughness ◽  
Passive Films ◽  
Experimental Result ◽  
Experimental Investigations ◽  
Workpiece Surface ◽  
Magnetic Abrasive Finishing ◽  
Original Surface ◽  
Abrasive Finishing ◽  
20 Nm ◽  
Alloy Metal

Abstract In order to obtain a high accuracy with high machining efficiency for finishing hard alloy metal material, we proposed a hybrid finishing method which is electrochemical (ECM) effects assisted magnetic abrasive finishing (MAF). In this study, the electrochemical magnetic abrasive finishing (EMAF process) was divided into EMAF stage and MAF stage. The metal surface can be easily finished with the passive films formed in electrochemical reactions. Simultaneously, the passive films can be removed by frictional action between magnetic brush and workpiece surface. Thus, the essence of EMAF process is to form and remove the passive films on the workpiece surface. This study focused on investigating the finishing mechanism and finishing characteristics of EMAF process. Through a series of experimental investigations, it can be confirmed that the finishing efficiency is remarkably improved by EMAF process. The optimal experimental result of EMAF process showed that the surface roughness was reduced to less than 30 nm from the original surface roughness 178 nm at 4 min in EMAF stage, and the surface roughness was finally reduced to 20 nm at 10 min in MAF stage. Additionally, we also found the finishing ability of magnetic abrasive decreased after 4 min EMAF stage.

Finite Element Simulation of Plane Magnetic Abrasive Finishing

2006 ◽  
Author(s):  
Atul Khatri ◽  
Vinod Yadava
Keyword(s):  
Surface Roughness ◽  
Finite Element ◽  
Magnetic Potential ◽  
Experimental Results ◽  
Workpiece Surface ◽  
Magnetic Abrasive Finishing ◽  
Hard Materials ◽  
Element Simulation ◽  
Finishing Process ◽  
Abrasive Finishing

The final machining (or finishing) of precision parts with high accuracy level is making the application of abrasive finishing technologies increasingly important. Magnetic abrasive finishing (MAF) is a new advanced finishing process used for fine finishing of extremely hard materials. It is employed for finishing of metals and non-metals. This paper focuses on the modeling and simulation for the prediction of surface roughness in plane magnetic abrasive finishing. A finite element based model is developed to find the magnetic potential distribution in gap between tool and workpiece. Further, magnetic potential is used to evaluate machining pressure, material removal and finally surface roughness of the workpiece surface. The simulation results are confirmed compared with the experimental results available in the literature. The simulated workpiece surface roughness shows features which are similar in nature to the experimental results.

Analysis of Surface Roughness and Surface Texture Generated by Pulsating Flexible Magnetic Abrasive Brush (P-FMAB)

2005 ◽  
Author(s):  
D. K. Singh ◽  
V. K. Jain ◽  
V. Raghuram ◽  
R. Komanduri
Keyword(s):  
Surface Roughness ◽  
Surface Texture ◽  
Pulsed Power ◽  
Workpiece Surface ◽  
Magnetic Abrasive Finishing ◽  
Abrasive Finishing ◽  
Abrasive Cutting ◽  
Off Time ◽  
Flexible Magnetic Abrasive Brush ◽  
The Magnetic Field

The direct current magnetic abrasive finishing (DC-MAF) process provides practically no stirring effect on the static flexible magnetic abrasive brush (FMAB) formed by the magnetic field in the working gap. Absence of stirring leads to dullness of abrasive cutting edges in contact with the workpiece which results in a low finishing rate. To overcome this problem, the FMAB has been made pulsating using a DC-pulsed power supply, and the process is hence termed pulsed current-magnetic abrasive finishing (PC-MAF). The surface roughness was found to improve remarkably by the formation and destruction of the FMAB during the on and off time respectively, under selected pulsed parameters. The surface texture indicates that the process consists of microscratches generated on the finished surface. Further, the surface appears to have been generated by the removal of material from peaks of the workpiece surface by rotation as well as lateral movement of the FMAB.

scholarly journals Experimental Investigations of Magnetic Abrasive Finishing on Titanium

2019 ◽  
Vol 4 (2) ◽  
Author(s):  
Shadab Ahmad ◽  
Ranganath M Singari ◽  
R S Mishra
Keyword(s):  
Surface Morphology ◽  
Material Removal ◽  
Experimental Investigations ◽  
Sem Images ◽  
Magnetic Abrasive Finishing ◽  
Flat Surfaces ◽  
Abrasive Finishing ◽  
Finished Surface ◽  
Titanium Material ◽  
Finishing Processes

Magnetic abrasive finishing (MAF) is one of the finishing processes which produces nano finished surfaces. The material removal process is in the form of microchips. The present paper introduces a novel work based on the principle of MAF for flat surfaces. The experiments were conducted on titanium material to investigate the response of MAF on hardness. Matlab has been used to evaluate the performance. The results obtained from the experimental investigations revealed that the hardness improves with MAF. The surface morphology of finished surface was studied with the help of SEM images

Experimental investigations into ultrasonic-assisted double-disk magnetic abrasive finishing of two paramagnetic materials

2015 ◽  
Vol 231 (6) ◽  
pp. 1021-1038 ◽  
Author(s):  
Prateek Kala ◽  
Pulak M Pandey
Keyword(s):  
Mechanical Properties ◽  
Process Parameters ◽  
Experimental Investigations ◽  
Magnetic Abrasive Finishing ◽  
Force Microscopy ◽  
Finishing Process ◽  
Abrasive Finishing ◽  
Ultrasonic Assisted ◽  
Paramagnetic Materials ◽  
Pulse On Time

This article evaluates the finishing performance of ultrasonic-assisted double-disk magnetic abrasive finishing process on two paramagnetic materials (copper alloy and stainless steel) with different mechanical properties such as flow stress, hardness, shear modulus, and so on. The finishing experiments were performed based on response surface methodology. The results obtained after finishing have been analyzed to determine the effect of different process parameters such as working gap, rotational speed, and pulse-on time of ultrasonic vibration for both work materials and to study various interaction effects that may significantly affect the finishing performance by the process. The outcome of analysis for the two different work materials has been critically compared to understand the effect of the considered process parameters on the finishing performance of the process based on mechanical properties of the workpiece such as hardness. Furthermore, the scanning electron microscopy and atomic force microscopy were carried on the workpiece surface to understand the possible mechanism of material removal and the surface morphology produced after the finishing process.

scholarly journals Micro-Machining Characteristics in High-Speed Magnetic Abrasive Finishing for Fine Ceramic Bar

Metals ◽  
2020 ◽  
Vol 10 (4) ◽  
pp. 464 ◽  
Author(s):  
Joonhyuk Song ◽  
Takeo Shinmura ◽  
Sang Don Mun ◽  
Minyoung Sun
Keyword(s):  
Surface Roughness ◽  
High Speed ◽  
High Surface ◽  
Stable Region ◽  
Micro Machining ◽  
Fine Ceramic ◽  
Magnetic Abrasive Finishing ◽  
Abrasive Finishing ◽  
Machining Characteristics ◽  
Diameter Change

The research aims to describe the micro-machining characteristics in a high-speed magnetic abrasive finishing, which is applicable for achieving the high surface accuracy and dimensional accuracy of fine ceramic bars that are typically characterized by strong hardness and brittle susceptibility. In this paper, the high-speed magnetic abrasive finishing was applied to investigate how the finishing parameters would have effects on such output parameters as surface roughness, variation of diameters, roundness, and removed weight. The results showed that, under variants of diamond abrasives sizing between (1, 3 and 9 µm), 1 µm showed comparatively good values as for surface roughness and roundness within shortest processing time. When the optimal condition was used, the surface roughness Ra and roundness (LSC) were improved to 0.01 µm and 0.14 µm, respectively. The tendency of diameter change could be categorized into two regions—stable and unstable. The finding from the study was that the performance of ultra-precision processing linear controlling was possibly achievable for the stable region of diameter change, while linearly controlling diameters in the workpiece.

Experimental Study on Mechanism and Performance of Magnetic Abrasive Finishing

2006 ◽  
Vol 304-305 ◽  
pp. 384-388
Author(s):  
Shu Ren Zhang ◽  
W.N. Liu
Keyword(s):  
Surface Roughness ◽  
Magnetic Force ◽  
Ferromagnetic Materials ◽  
Feed Speed ◽  
Magnetic Abrasive Finishing ◽  
Abrasive Particles ◽  
Technical Parameters ◽  
Abrasive Finishing ◽  
Series Of Experiments ◽  
And Performance

Magnetic Abrasive Finishing (MAF) is relatively a new finishing technique that employs the magnetic force for finishing. In the paper, finishing mechanism of MAF is studied and four self-sharpening modes of abrasive particles are put forward. With the cylindrical magnetic abrasive apparatus designed and made by the author, a series of experiments on finishing the cylindrical surfaces of nonferromagnetic materials and ferromagnetic materials are carried out. The influence of technical parameters (finishing speed, feed speed, finishing time and so on) on finishing performance is analyzed. Choosing the optimized technical parameters, , the surface roughness of ferromagnetic materials changes from Ra 0.825µm to Ra 0.045µm after the 12-minute finishing experiment; the surface roughness of nonferromagnetic materials changes from Ra 0.434µm to Ra 0.096µm after the 20-minute finishing experiment.

Sign in / Sign up

Export Citation Format

Share Document