Improving the surface quality in wire electrical discharge machined specimens by removing the recast layer using magnetic abrasive finishing method

2012 ◽  
Author(s):  
Sasan Khalaj Amineh ◽  
Alireza Fadaei Tehrani ◽  
Aminollah Mohammadi
Keyword(s):  
Surface Quality ◽  
Electrical Discharge ◽  
Recast Layer ◽  
Magnetic Abrasive Finishing ◽  
Abrasive Finishing

Investigation on the Improvement of Surface Quality by the Magnetic Plate-Assisted Magnetic Abrasive Finishing Process

2021 ◽  
Vol 1018 ◽  
pp. 111-116
Author(s):  
Yan Hua Zou ◽  
Hui Jun Xie
Keyword(s):  
Magnetic Field ◽  
Surface Quality ◽  
Field Distribution ◽  
Magnetic Field Distribution ◽  
Magnetic Flux Density ◽  
Magnetic Pole ◽  
Magnetic Abrasive Finishing ◽  
Abrasive Finishing ◽  
Glass Lens ◽  
The Magnetic Field

The traditional magnetic abrasive finishing (MAF) process, the magnetic flux density at the bottom of the magnetic pole is unevenly distributed, resulting in poor uniformity of the finished surface. Therefore, it is proposed to improve the surface quality by attaching a magnetic plate at the bottom of the workpiece to improve the magnetic field distribution. It is confirmed by simulation that the magnetic field distribution at the bottom of the magnetic pole is effectively improved after the magnetic plate is attached. It is proved through experiments that the magnetic plate-assisted MAF process can obtain a smoother surface. The experimental results show that the surface roughness of the glass lens improves from 246 nm Ra to 3 nm Ra through the magnetic plate-assisted MAF process within 45min.

Improving Electrical Discharge Machined Surfaces Using Magnetic Abrasive Finishing

2004 ◽  
Vol 8 (1) ◽  
pp. 103-118 ◽  
Author(s):  
Biing-Hwa Yan ◽  
Geeng-Wei Chang ◽  
Jung-Hsien Chang ◽  
Rong-Tzong Hsu
Keyword(s):  
Electrical Discharge ◽  
Magnetic Abrasive Finishing ◽  
Abrasive Finishing ◽  
Machined Surfaces

Investigation of a New Kind of Magnetic Abrasive Grains Used for Finishing Inner-Hole Surface

2011 ◽  
Vol 487 ◽  
pp. 289-292
Author(s):  
Y.H. Ding ◽  
Xin Gai Yao ◽  
G. Ya ◽  
P. Lu
Keyword(s):  
Surface Quality ◽  
Experimental Results ◽  
Abrasive Resistance ◽  
Magnetic Abrasive Finishing ◽  
Abrasive Grains ◽  
Abrasive Grain ◽  
Abrasive Finishing ◽  
Finishing Tool

Magnetic abrasive grain is a kind of tool for magnetic abrasive finishing (MAF). The lifetime of the grains is the choke point which restricts its finishing efficiency and the surface quality processed by MAF .Therefore, a kind of magnetic abrasive grains based on Cr and Ni elements is investigated. The interrelated experimental results show: the new magnetic abrasive grains is a practical finishing tool with longer lifetime, higher finishing efficiency, better abrasive resistance compared with traditional magnetic abrasive grains. It supplies a power for promoting the development of MAF.

scholarly journals Influence of Process Parameters and Initial Surface on Magnetic Abrasive Finishing of Flat Surfaces on CNC Machine Tools

2021 ◽  
Vol 5 (4) ◽  
pp. 108
Author(s):  
Andrii Zelinko ◽  
Florian Welzel ◽  
Dirk Biermann ◽  
Viktor Maiboroda
Keyword(s):  
Surface Quality ◽  
Process Parameters ◽  
Machine Tools ◽  
End Milling ◽  
Numerical Control ◽  
Cnc Machine Tools ◽  
Initial Surface ◽  
Cnc Machine ◽  
Magnetic Abrasive Finishing ◽  
Abrasive Finishing

Magnetic abrasive finishing (MAF) shows a high potential for use on computerized numerical control (CNC) machine tools as a standard tool to polish workpieces directly after the milling process. This paper presents a new MAF tool with a single, large permanent magnet and a novel top cover structure for finishing the plain ferromagnetic workpieces. The top cover structure of the MAF tool, combined with an optimized working gap, ensures the effect of mechanical powder compaction, which leads to a significant increase in process capability and surface roughness reduction. The influence of the process parameters such as feed rate, equivalent cutting speed, working gap (including for three grain sizes) and the gap to the magnet was investigated. In addition, the influence of the initial surface after face milling, end milling, ball end milling and grinding on the surface quality after MAF was investigated. Furthermore, three typical surfaces after milling and MAF were analyzed. By magnetic abrasive finishing, a significant surface quality improvement of the initial milled surfaces to roughness values up to Ra = 0.02 µm and Rz = 0.12 µm in one processing step could be achieved.

MAGNETIC ABRASIVE FINISHING PROCESS — A PARAMETRIC ANALYSIS

2005 ◽  
Vol 04 (02) ◽  
pp. 131-150 ◽  
Author(s):  
S. C. JAYSWAL ◽  
V. K. JAIN ◽  
P. M. DIXIT
Keyword(s):  
Magnetic Field ◽  
Surface Roughness ◽  
Finite Element ◽  
Flux Density ◽  
Surface Quality ◽  
Real Life ◽  
Magnetic Abrasive Finishing ◽  
Abrasive Particles ◽  
Abrasive Finishing ◽  
The Magnetic Field

Magnetic Abrasive Finishing (MAF) is one of the non-conventional finishing processes, which produces a high level of surface quality and is primarily controlled by magnetic field. In MAF, workpiece is kept between the two poles (N and S) of a magnet. The working gap between the workpiece and the magnet is filled with magnetic abrasive particles. A magnetic abrasive flexible brush (MAFB) is formed, acting as a multipoint cutting tool, due to the effect of magnetic field in the working gap. This paper deals with theoretical investigations of the plane MAF process to know the effect of the process parameters on the surface quality produced. The magnetic field is simulated using finite element model of the process. The magnetic field is also measured experimentally to validate the theoretical results. A series of numerical experiments are performed using the finite element and surface roughness models of the process to study the effect of flux density, height of working gap, size of magnetic abrasive particles and slots (size and location) in the magnetic pole on the surface quality. Based on the results, it is concluded that surface roughness value (R max ) of the workpiece decreases with increase in flux density and size of magnetic abrasive particles. Surface roughness value (R max ) decreases with decrease in working gap. R max value also decreases when the magnet has a slot as compared to the magnet having no slot. Present study would help in understanding the effect of the various parameters on surface roughness value without doing a number of real-life experiments.

scholarly journals Interplay of Process Variables in Magnetic Abrasive Finishing of AISI 1018 Steel Using SiC and Al2O3 Abrasives

2019 ◽  
Vol 3 (2) ◽  
pp. 29 ◽  
Author(s):  
Mohammad Uddin ◽  
Vincent Santos ◽  
Romeo Marian
Keyword(s):  
Surface Quality ◽  
Process Parameters ◽  
Rotational Speed ◽  
Mesh Size ◽  
Magnetic Abrasive Finishing ◽  
Abrasive Particles ◽  
Abrasive Finishing ◽  
Type Size ◽  
Dominant Process ◽  
Series Of Experiments

This paper investigates the underlying interplay between the key process parameters of magnetic abrasive finishing (MAF) in improving surface quality. The five process parameters considered were the working gap, rotational speed, feed rate, abrasive amount, and abrasive mesh when MAFed independently with two abrasive particles—SiC and Al2O3. A series of experiments were conducted with an in-house built MAF tool. Based on the main effect results, a model predicting roughness reduction was developed. Results show that surface quality improvement and the underlying dominant process parameters seem unique to the abrasive type used. When MAFed with SiC, the abrasive quantity and rotational speed influence the most. On the other hand, when MAFed with Al2O3, the trend is different to SiC, i.e., the abrasive mesh size and the working gap are dominant. The prediction model was well validated by independent experiments, indicating its accuracy in estimating and optimizing the process outcome. MAF is a simple process with a complex interplay between parameters. This is very crucial when abrasive type, size, and amount to be used are concerned, which warrants a deeper investigation in terms of underlying dynamics, interactions, and the deformation of abrasive, magnetic, and workpiece materials.

Research Progress and New Patents of Magnetic Grinding Machine

2019 ◽  
Vol 12 (3) ◽  
pp. 201-210
Author(s):  
Yuan Li ◽  
Ye Dai ◽  
Yunshan Qi ◽  
Yufei Gao
Keyword(s):  
Surface Quality ◽  
Low Cost ◽  
Development Trend ◽  
Research Progress ◽  
Processing Efficiency ◽  
Magnetic Abrasive Finishing ◽  
Advantages And Disadvantages ◽  
Abrasive Finishing ◽  
Grinding Machine

Background: Mechanical parts in processing and manufacturing process will produce burr, scratches and other surface quality problems, which have adverse effects on the precision, use, reprocessing location, operation safety and appearance quality of the parts, so it is necessary to grind the workpiece surface. Objective: Based on the recent development in the field of magnetic grinding and related patent research, it can provide reliable help to solve the problem of finishing the surface of parts with complex shapes and small volumes. Methods: This paper reviewed some patents and research advances related to magnetic abrasive finishing, and the advantages and disadvantages of the magnetic grinding machine in the finishing process were summarized. The outstanding grinding effect of the new vibration assisted magnetic grinder was introduced. Results: The working characteristics of various magnetic grinding machines were summarized, and the development trend of magnetic grinding and finishing was prospected. Conclusion: Magnetic abrasive finishing has good flexibility, strong self-sharpening, wide applicable scope, high processing efficiency, simple processing equipment and low cost. It can control the grinding efficiency and grinding precision. The machining efficiency and quality of magnetic grinding can be improved with the appropriate amplitude of vibration assist, and the surface quality can be improved significantly.

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