Experimental Study on Mechanism and Performance of Magnetic Abrasive Finishing

2006 ◽  
pp. 384-388
Author(s):  
Shu Ren Zhang ◽  
W.N. Liu
Keyword(s):  
Experimental Study ◽  
Magnetic Abrasive Finishing ◽  
Abrasive Finishing ◽  
And Performance

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.

Effective Deburring of the Burr at Intersecting Hole by Permanent Magnet Inductor

2007 ◽  
Vol 24-25 ◽  
pp. 29-38 ◽  
Author(s):  
S.R. Jo ◽  
S.L. Ko ◽  
Yuri M. Baron
Keyword(s):  
Plastic Deformation ◽  
Permanent Magnet ◽  
Iron Powder ◽  
Rotational Speed ◽  
Machining Process ◽  
Magnetic Abrasive Finishing ◽  
Effective Removal ◽  
Abrasive Finishing ◽  
And Performance ◽  
Magnetic Nature

The sharp burrs produced by plastic deformation during machining of the precision components deteriorates the precision and performance of a machine. Thus, effective removal of the burrs may improve productivity and performance of the machinery. This study was conducted based on the experiment to remove fine burrs produced during machining process using the magnetic abrasive finishing method. The magnetic abrasive finishing using the abrasive feature of an abrasive and the magnetic nature of iron is an abrasive method to brush the burrs with iron powder that has a cohesive power due to the line of induction. The purpose of this study is to remove the burrs at intersecting holes which are difficult to access with tools, using the magnetic abrasive finishing method. Special tool is designed for deburring micro burr at intersecting holes. To find the proper deburring condition, gap distance, rotational speed of inductor, components of powder and effect of coolant are analyzed.

Experimental Study on Increasing Magnetic Abrasive Finishing Efficiency of Finishing Nonferromagnetic Materials

2007 ◽  
Vol 359-360 ◽  
pp. 300-304
Author(s):  
Shu Ren Zhang ◽  
Li Feng Yang ◽  
Guo Xiang Wu
Keyword(s):  
Experimental Study ◽  
Surface Roughness ◽  
Magnetic Force ◽  
Magnetic Flux Density ◽  
Experimental Conditions ◽  
Magnetic Abrasive Finishing ◽  
Abrasive Particles ◽  
Abrasive Finishing ◽  
Series Of Experiments ◽  
Diameter Reduction

Magnetic Abrasive Finishing (MAF) is relatively a new finishing technique which employs the magnetic force for finishing. In this paper, the influence of the magnetic flux density on the finishing pressure and the finishing efficiency during finishing is analyzed. With the cylindrical magnetic finishing apparatus developed by the author, a series of experiments on finishing the cylindrical surfaces of nonferromagnetic materials and ferromagnetic materials are carried out. To solve the problems of low finishing efficiency and abrasive particles escaping easily because of lack of finishing pressure during finishing nonferromagnetic materials, a new method of increasing the finishing pressure by using the “pressure-increasing bag” in the finishing system is put forward. A lot of comparative experiments on finishing nonferromagnetic materials with the “pressure-increasing bag” and without the “pressure-increasing bag” are performed. Under the same experimental conditions, the amount of diameter-reduction d is increased from 1μm to 1.88μm and the surface roughness is improved from Ra0.315μm to Ra0.250μm by using the “pressure-increasing bag”. The results show that the finishing pressure is increased obviously and the MAF efficiency of finishing nonferromagnetic materials is improved dramatically by using the “pressure-increasing bag”.

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