Study on Plan Magnetic Abrasive Finishing - Discussion on Processing Methods for Improving Flatness

2021 ◽  
Vol 1018 ◽  
pp. 123-128
Author(s):  
Yu Long Zhang ◽  
Yan Hua Zou ◽  
Hui Jun Xie
Keyword(s):  
Surface Roughness ◽  
Processing Method ◽  
Work Piece ◽  
Initial Surface ◽  
Magnetic Abrasive Finishing ◽  
Practical Applications ◽  
Surface Polishing ◽  
Abrasive Finishing ◽  
Surface Flatness ◽  
Traditional Processing

Magnetic abrasive finishing (MAF) is a precision surface polishing method. At present, most studies on planar MAF are focused on improving the surface roughness accuracy and the uniformity of roughness. In practical applications, the initial surface of the work piece is not only a rough surface, but also a flat surface without a uniform height. While the traditional processing method improves the surface roughness accuracy, the original surface is basically unchanged. In this paper, a processing method is studied. According to the uneven distribution of magnetic brushes, the reasonable distribution of processing speed and processing time can finally achieve the purpose of improving the surface flatness. At the same time, this paper analyzes the non-uniform characteristics of the magnetic pole and the magnetic brush itself, and verifies the effectiveness of the processing method through experiments.

Surface texture improvement of magnetic and non magnetic materials using magnetic abrasive finishing process

2020 ◽  
pp. 095440622097059
Author(s):  
Kamepalli Anjaneyulu ◽  
Gudipadu Venkatesh
Keyword(s):  
Surface Roughness ◽  
Surface Finish ◽  
Surface Texture ◽  
Magnetic Particles ◽  
Supply Voltage ◽  
Initial Surface ◽  
Magnetic Abrasive Finishing ◽  
Abrasive Finishing ◽  
Change In Mean ◽  
Al 2024

The present study focused on surface texture characteristics of magnetic material, Mild steel (MS) as well as nonmagnetic material, Aluminum 2024 (Al 2024) alloy with the application of a laboratory-developed magnetic abrasive finishing (MAF) process. MAF is one of the unconventional finishing processes to attain a satisfactory finishing level up to nanoscale. In MAF, the surface finish is controlled by a flexible magnetic abrasive brush (FMAB) which has a combination of abrasives (Al2O3, SiC, etc.) and magnetic particles (iron powder). The experiments were planned using (L27) full factorial design, different levels of weight percentage of abrasives (20–30%), speed of the electromagnet (180–2100rpm), and electromagnet supply voltage (30–50 V) were varied to enhance the surface responses. The responses considered were % improvements of change in the surface finish (%ΔRa), change in average peak to valley height (%ΔRz), change in total profile height (%ΔRt), and change in mean square root surface finish (%ΔRq). Analysis of variances (ANOVA) was evaluated and discussed. It is observed that the speed of the electromagnet and voltage are the most influencing variable parameters that most impacted on the responses. Surface roughness was measured before and after the MAF processing of MS and Al 2024 using a Suftronic S-100 surface roughness tester. The obtained surface morphology was examined by Scanning Electron Microscopy (SEM). It was observed that MS has %ΔRa = 83, %ΔRz = 65, %ΔRt = 65.5 and %ΔRq = 72.6 while Al 2024 has %ΔRa = 65, %ΔRz =50, %ΔRt = 51 and %ΔRq = 55 with noticeable surface texture improvement compared to the initial surface roughness obtained using surface grinding process.

Ultra-High-Precision Machining of Microscale-Diameter Zirconia Ceramic Bars by Means of Magnetic Abrasive Finishing

2016 ◽  
Vol 851 ◽  
pp. 98-105 ◽  
Author(s):  
Nam Jun Park ◽  
Li Da Heng ◽  
Rui Wang ◽  
Min Soo Kim ◽  
Sang Don Mun
Keyword(s):  
Surface Roughness ◽  
High Precision ◽  
High Performance ◽  
Dimensional Accuracy ◽  
Zirconia Ceramic ◽  
Precision Machining ◽  
Initial Surface ◽  
Magnetic Abrasive Finishing ◽  
Revolution Speed ◽  
Abrasive Finishing

The paper proposes a new ultra-high-precision machining technique, based on magnetic abrasive finishing, to achieve both high dimensional accuracy and surface accuracy of microscale-diameter materials that are difficult or impossible to machine conventionally. Microscale-diameter zirconia ceramic bars were used as the workpieces, and were machined by means of the proposed technique at different workpiece revolution speeds (1,000, 10,000, 20,000, and 35,000 rpm). Machining depth increased with workpiece revolution speed, and was the greatest for the highest speed studied of 35,000 rpm. The technique also yielded excellent performance in terms of the surface roughness; the initial surface roughness (Ra) of 0.18 µm was decreased to 0.02 µm under machining at 35,000 rpm for 40 s. SEM and AFM micrographs gave evidence of the technique’s high performance.

Effect of Lubricant Volume and Working Gap on the Surface Roughness and Material Removal Rate in Magnetic Abrasive Finishing

2010 ◽  
Vol 297-301 ◽  
pp. 390-395
Author(s):  
Mehrdad Vahdati ◽  
E. Sadeghinia ◽  
Ali Shokuhfar
Keyword(s):  
Surface Roughness ◽  
Material Removal Rate ◽  
Material Removal ◽  
Removal Rate ◽  
Work Piece ◽  
Magnetic Abrasive Finishing ◽  
Complex Curves ◽  
Abrasive Finishing ◽  
Technology Industries ◽  
High Technology Industries

Technological requirements urges high technology industries using materials with advanced properties. Although it is compulsory using these materials due to their advantages, some of them should be tolerated because of their weak machining and mechanical properties. Attempts for qualitative machining of complex curves on many work pieces may result in the advent of new finishing techniques. One of the most newly introduced techniques is Magnetic Abrasive Finishing, MAF. In this paper a study on the effects of tool and work piece gap, and lubricant volume, on the roughness and material removal rate have been studied. The results show that setting the working gap to 3 mm and the lubricant volume to 0.7 ml, yields a change in surface roughness (Ra), and the material removal (MR) will gain its best result.

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.

Polishing Processing to Internal Surface of Non-Magnetic Pipe by Magnetic Abrasive Finishing

2008 ◽  
Vol 53-54 ◽  
pp. 137-140
Author(s):  
Y. Chen ◽  
X. Wang ◽  
C.J. Zhang
Keyword(s):  
Magnetic Force ◽  
Solution Method ◽  
Internal Surface ◽  
Special Equipment ◽  
Magnetic Abrasive Finishing ◽  
Surface Polishing ◽  
Abrasive Finishing ◽  
Inner Surface ◽  
Magnetic Force Line ◽  
Usual Tool

It is very difficult matter that polishes the internal surface of the pipe, especially to the thin pipe with the traditional surface technology. Because a usual tool cannot into the inner surface of the thin pipe and automation do not achieved easily. This paper brings up a new method that utilize the characteristic of the magnetic force line may penetrate the non-magnetic material, may using the magnetic abrasive finishing (MAF) method complete to the inner surface of the thin pipe precise polishing. The magnetic abrasive finishing does not need special equipment to complete the complex shape internal surface polishing. Moreover, we already obtained the famous processing effect through the experiment. Meanwhile this paper analyses some factors of influences efficiency, and propose some solution method.

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