New magnetically assisted finishing method: material removal with magnetorheological fluid jet

2004 ◽  
Author(s):  
William Kordonski ◽  
Aric B. Shorey ◽  
Arpad Sekeres
Keyword(s):  
Material Removal ◽  
Magnetorheological Fluid ◽  
Magnetically Assisted

A Mechanistic Model of Material Removal in Magnetorheological Finishing (MRF)

2007 ◽  
Vol 359-360 ◽  
pp. 384-388
Author(s):  
Feng Jun Chen ◽  
Shao Hui Yin ◽  
Jian Wu Yu ◽  
Hitoshi Ohmori ◽  
Wei Min Lin ◽  
...  
Keyword(s):  
Material Removal Rate ◽  
Material Removal ◽  
Reynolds Equation ◽  
Removal Rate ◽  
Mechanistic Model ◽  
Magnetorheological Fluid ◽  
Magnetorheological Finishing ◽  
Material Removal Model ◽  
Removal Model ◽  
The Magnetic Field

According to the sharp rheological characteristics of magnetorheological fluid in the magnetic field, the principle and mechanism of magnetorheological finishing is analyzed. Based on the Preston equation, the Reynolds equation and its boundary conditions, the two-dimensional material removal model is built and simulated. Furthermore, a series of MRF experiments are carried out, and the influence of the immersed depth and material kinds on material removal rate are clarified respectively. The experimental results are compared with the modeling results of material removal rate to confirm the mechanistic model validity.

Magnetorheological fluid polishing using an electromagnet with straight pole-piece for improving material removal rate

2018 ◽  
Vol 32 (7) ◽  
pp. 3345-3350 ◽  
Author(s):  
Byung Chan Kim ◽  
Jae Hwa Chung ◽  
Myeong Woo Cho ◽  
Seok Jae Ha ◽  
Gil-Sang Yoon
Keyword(s):  
Material Removal Rate ◽  
Material Removal ◽  
Removal Rate ◽  
Magnetorheological Fluid ◽  
Pole Piece

Magnetorheological properties and polishing characteristics of silica-coated carbonyl iron magnetorheological fluid

2017 ◽  
Vol 29 (1) ◽  
pp. 137-146 ◽  
Author(s):  
Kwang Pyo Hong ◽  
Ki Hyeok Song ◽  
Myeong Woo Cho ◽  
Seung Hyuk Kwon ◽  
Hyoung Jin Choi
Keyword(s):  
Magnetic Field ◽  
Surface Roughness ◽  
Field Intensity ◽  
Carbonyl Iron ◽  
Material Removal ◽  
Magnetic Field Intensity ◽  
Magnetorheological Fluid ◽  
Wheel Speed ◽  
Magnetorheological Fluids ◽  
Experimental Conditions

While magnetorheological fluids can be used for ultra-precise polishing, for example, of advanced optical components, oxidation of metallic particles in water-based magnetorheological fluids causes irregular polishing behavior. In this study, carbonyl iron microspheres were initially coated with silica to prevent oxidation and were used to polish BK7 glass. In addition, their rheological and sedimentation characterizations were investigated. Material removal and surface roughness were analyzed to investigate the surface quality and optimal experimental conditions of polishing wheel speed and magnetic field intensity. The maximum material removal was 0.95 µm at 95.52 kA/m magnetic field intensity and 1854 mm/s wheel speed. A very fine surface roughness of 0.87 nm was achieved using the silica-coated magnetorheological fluid at 47.76 kA/m magnetic field intensity and 1854 mm/s wheel speed.

Effects of Magnetic Fluid on Machining Characteristics in Magnetic Field Assisted Polishing Process

2013 ◽  
Vol 797 ◽  
pp. 396-400
Author(s):  
Shao Hui Yin ◽  
Zhi Qiang Xu ◽  
Hong Jie Duan ◽  
Feng Jun Chen
Keyword(s):  
Magnetic Field ◽  
Surface Roughness ◽  
Magnetic Fluid ◽  
Material Removal ◽  
Magnetorheological Fluid ◽  
Magnetic Fluids ◽  
Magnetic Characteristics ◽  
Polishing Process ◽  
Magnetic Cluster ◽  
Machining Characteristics

Magnetic characteristics of three magnetic polishing fluids such as magnetic fluid (MF), magnetorheological fluid (MRF), and magnetic compound fluid (MCF) under magnetic field are experimentally investigated and analyzed. Their magnetic cluster structures under action of magnet field are observed, and their magnetic cluster models are established. Magnetic flied assisted polishing experiments for tungsten carbide are developed used these three kinds of magnetic fluids, material removal and surface roughness are respectively measured. At last, the machining characteristic of three magnetic fluids are contrasted and discussed according to experimental results.

Modeling and Experimental Study of Magnetorheological Flexible Gasbag Polishing

2010 ◽  
Vol 102-104 ◽  
pp. 634-638 ◽  
Author(s):  
Shi Ming Ji ◽  
Guo Da Chen ◽  
Ming Sheng Jin ◽  
Li Zhang
Keyword(s):  
Material Removal ◽  
Magnetic Force ◽  
Magnetorheological Fluid ◽  
Variable Magnetic Field ◽  
New Approach ◽  
Electromagnetic Coil ◽  
Main Factors ◽  
Surface Figure ◽  
Polishing Pressure ◽  
Orthogonal Tests

Magnetorheological flexible gasbag polishing based on the special application of magnetorheological fluid (MRF) in robotic gasbag polishing technique is a novel efficient approach in the field of mould finishing. It can control the polishing pressure by changing the magnetic force generated by MRF inside of the gasbag with the effect of variable magnetic field of electromagnetic coil. Its mathematical model is established to study the main factors influencing the material removal. The orthogonal tests are applied to analyze these important parameters. From the experimental results, it can be seen that this new approach is desirable in realizing the control of surface figure accuracy and improvement of surface quality under certain condition.

Parameter optimization for finishing hard materials with magnetorheological fluid using the penalized multi-response Taguchi method

2009 ◽  
Vol 223 (8) ◽  
pp. 955-968 ◽  
Author(s):  
B Jung ◽  
K-I Jang ◽  
B-K Min ◽  
S J Lee ◽  
J Seok
Keyword(s):  
Taguchi Method ◽  
Material Removal ◽  
Removal Rate ◽  
Magnetorheological Fluid ◽  
Relative Importance ◽  
Optimal Conditions ◽  
Severity Factor ◽  
Sintered Iron ◽  
Hard Materials ◽  
Finishing Process

This paper presents a novel penalized multi-response Taguchi method that is used to determine the optimal conditions and parameters for a wheel-type magnetorheological (MR) finishing process that uses sintered iron-carbon nanotube (I-CNT) abrasives. The main goal of this study is to achieve the best compromise, within given boundary constraint conditions, between the maximum material removal rate and the minimum surface roughness. The proposed Taguchi method includes two main parameters, namely the weighting loss factor and the severity factor, that account, respectively, for the response weights and the constraint conditions and that control the optimality direction. The method is applied to the finishing of hard-disk slider surfaces made of Al2O3-TiC, and the effects of the weighting loss and severity factors, along with their significance and relative importance in optimizing the finishing process, are thoroughly examined.

Material removal of glass by magnetorheological fluid jet

2015 ◽  
Vol 16 (4) ◽  
pp. 629-637 ◽  
Author(s):  
Wook-Bae Kim ◽  
Eunseok Nam ◽  
Byung-Kwon Min ◽  
Doo-Sun Choi ◽  
Tae-Jin Je ◽  
...  
Keyword(s):  
Material Removal ◽  
Magnetorheological Fluid

Study on the Removal Mechanism of Magnetorheological Finishing (MRF) by Using of Nano-Diamond Abrasives

2014 ◽  
Vol 1027 ◽  
pp. 226-229
Author(s):  
Zhi Qiang Xu ◽  
Shao Hui Yin ◽  
Sheng Gong ◽  
Yong Qiang Wang
Keyword(s):  
Surface Quality ◽  
Material Removal ◽  
High Efficiency ◽  
Optical Glass ◽  
Magnetorheological Fluid ◽  
Removal Mechanism ◽  
Material Removal Mechanism ◽  
Magnetorheological Finishing ◽  
Advanced Machining ◽  
Series Of Experiments

Magnetorheological finishing (MRF) is an advanced machining technology can achieve high efficiency and smoother surfaces. This study discusses the material removal mechanism of MRF, and proposes a kind of magnetorheological fluid with the nano-diamond abrasives. A series of experiments on the BK7 optical glass were conducted to investigate effects of the concentration of nano-diamond abrasives on surface quality and removal efficiency.

The Effect of Polishing Tool Path on Polishing Parameters

2011 ◽  
Vol 101-102 ◽  
pp. 1043-1046 ◽  
Author(s):  
Di Zheng ◽  
Feng Lu ◽  
Li Zhong Zhang ◽  
Yong Jie Shi
Keyword(s):  
Path Planning ◽  
Material Removal ◽  
Tool Path ◽  
Magnetorheological Fluid ◽  
Planning Method ◽  
Aspheric Surfaces ◽  
Coupling Problem ◽  
Polishing Force ◽  
Polishing Path ◽  
Polishing Tool

The force-position decoupling technology based on Magnetorheological Fluid Torque Servo (MRT) can effectively solve the force-position coupling problem existed commonly in polishing processes. In the new polishing system, polishing force is not generated directly by the displacement of polishing tool, but provided by the MRT. Polishing path planning is another key point of the force-position decoupling technology. In this paper, a polishing path planning method was proposed, and the effect of polishing tool path on polishing parameters was analyzed. The law obtained will guide the uniform material removal of aspheric surfaces.

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