Ultra Smooth Polishing Research Based on the Cluster Magnetorheological Effect

2011 ◽  
Vol 487 ◽  
pp. 283-288 ◽  
Author(s):  
Zhan Cheng Wu ◽  
Qiu Sheng Yan ◽  
Zhen Wei Bai ◽  
Ling Ye Kong ◽  
Jing Fu Chai
Keyword(s):  
Surface Roughness ◽  
High Precision ◽  
High Efficiency ◽  
Optical Glass ◽  
Experimental Device ◽  
Silicon Slice ◽  
Order Of Magnitude ◽  
Magnetorheological Effect ◽  
Mr Effect ◽  
K9 Glass

Based on the principle of MR polishing processing, cluster MR-effect polishing method which formed by cluster distributed magnetic body has been put forward in this article. The author analyzed the principle of the cluster MR-effect plane polishing, developed experimental device and conducted processing experiment to K9 optical glass and silicon slice. Results show that the method is feasible and can realize high precision polishing. The surface roughness of K9 glass and silicon slice can achieve respectively Ra0.005µm and Ra0.016µm finally after processed. It has high efficiency at the same time, the surface roughness can decrease 1 order of magnitude after processed 10 minutes, the surface roughness of K9 glass and silicon slice can realize respectively decrease 3 orders of magnitude and 1 order of magnitude after processed 50 minutes.

Influence of Abrasive on Planarization Grinding Based on the Cluster Magnetorheological Effect

2011 ◽  
Vol 325 ◽  
pp. 542-547
Author(s):  
Qiu Sheng Yan ◽  
Jie Wen Yan ◽  
Jia Bin Lu ◽  
Wei Qiang Gao ◽  
Min Li
Keyword(s):  
Surface Roughness ◽  
Grain Size ◽  
Optical Glass ◽  
Removal Rate ◽  
Mr Fluid ◽  
Grinding Method ◽  
Magnetorheological Effect ◽  
The Difference ◽  
Mr Effect

A new planarization grinding method based on the cluster magnetorheological (MR) effect is presented to grind optical glass in this paper. Some process experiments were conducted to reveal the influence of the species and granularity and content of the abrasive materials in the MR fluid on the machining effect, furthermore, the machining characteristic of grinded surface was studied. The results indicate that the abrasive influences definitively on machining effect of this planarization grinding method based on the cluster MR-effect. Under the certain experiment condition, with the content of the abrasive 10% and grain size 800# of SiC, best machining effect can be achieved. The difference species of abrasive results in various machining effects. As for the removal rate of K9 optical glass: abrasive CeO2 is the best, the Al2O3 is the second and the SiC is the worst. While the surface roughness: abrasive SiC is the lowest，the Al2O3 is the second and CeO2 is the highest.

Ultra Smooth Planarization Polishing Technique Based on the Cluster Magnetorheological Effect

2010 ◽  
Vol 135 ◽  
pp. 18-23 ◽  
Author(s):  
Qiu Sheng Yan ◽  
Jie Wen Yan ◽  
Jia Bin Lu ◽  
Wei Qiang Gao
Keyword(s):  
Surface Roughness ◽  
Carbonyl Iron ◽  
Material Removal ◽  
Optical Glass ◽  
Removal Rate ◽  
Polished Surface ◽  
Mr Fluid ◽  
Magnetorheological Effect ◽  
The Difference ◽  
Mr Effect

A new planarization polishing method based on the cluster magnetorheological (MR) effect is presented to polish optical glass in this paper. Some process experiments were conducted to reveal the influence of the content of carbonyl iron and the abrasive materials in the MR fluid on the machining effect, and the machining characteristic of polished surface was studied. The results indicate that the surface roughness of the polished workpiece can be reduced rapidly when the strong magnetic field is applied, and ultra smooth surface with Ra 1.4 nm can be achieved while the CeO2 abrasives are used in the MR fluid. The content of carbonyl iron obviously influences the machining effect of this planarization polishing method based on cluster MR-effect. With the increase of the content of carbonyl iron in the MR fluid, the material removal rate improves and the surface roughness reduces rapidly. However, the difference of abrasive material results in various machining effects. As for the K9 optical glass, the CeO2 abrasive is better polishing abrasive than the SiC abrasive in the planarization polishing technique based on the cluster MR-effect.

Experimental Research on Smooth Surface Polishing Based on the Cluster Magnetorheological Effect

2012 ◽  
Vol 516 ◽  
pp. 79-83
Author(s):  
Jie Wen Yan ◽  
Qiu Sheng Yan ◽  
Jia Bin Lu ◽  
Wei Qiang Gao ◽  
Zhi Ying Huang
Keyword(s):  
Magnetic Field ◽  
Surface Roughness ◽  
Experimental Research ◽  
Smooth Surface ◽  
Optical Glass ◽  
Surface Polishing ◽  
Polishing Pad ◽  
Magnetorheological Effect ◽  
Mr Effect ◽  
The Magnetic Field

A new planarization polishing method, based on the cluster magnetorheological (MR) effect and using MR fluid to form the flexible polishing pad, is presented in this paper to polish optical glass. To explore the machining characteristic of the viscid and flexible polishing pad based on the cluster MR-effect, some process experiments were conducted to reveal the influence of the machining gap, the speed of the polishing disc and the polishing time on the machining effect. The results indicate that the viscid and flexible polishing pad based on the cluster MR-effect under a strong magnetic field can reduce surface roughness effectively. When the strength of the magnetic field is 2000Gs, and the content of the carbonyl iron is 12%, the surface roughness can be reduced rapidly from the original Ra0.27μm to Ra1.4nm based on the cluster MR-effect.

Development of a New Plate Polishing Technique with an Instantaneous Tiny-Grinding Wheel Cluster Based on Magnetorheological Effect

2008 ◽  
Vol 53-54 ◽  
pp. 155-160 ◽  
Author(s):  
Qiu Sheng Yan ◽  
Ai Jun Tang ◽  
Jia Bin Lu ◽  
Wei Qiang Gao
Keyword(s):  
Surface Roughness ◽  
Material Removal Rate ◽  
Material Removal ◽  
Removal Rate ◽  
Grinding Wheel ◽  
Abrasive Particles ◽  
Magnetorheological Effect ◽  
Material Removal Model ◽  
Mr Effect ◽  
Removal Model

A new plate polishing technique with an instantaneous tiny-grinding wheel cluster based on the magnetorheological (MR) effect is presented in this paper, and some experiments were conducted to prove its effectiveness and applicability. Under certain experimental condition, the material removal rate was improved by a factor of 20.84% as compared with the conventional polishing methods with dissociative abrasive particles, while the surface roughness of the workpiece was not obviously increased. Furthermore, the composite of the MR fluid was optimized to obtain the best polishing performance. On the basis of the experimental results, the material removal model of the new plate polishing technique was presented.

The Super-Thin Rod Cylindrical Honing Technology Research

2012 ◽  
Vol 503-504 ◽  
pp. 764-767 ◽  
Author(s):  
Lin Zhu ◽  
Lin Pan
Keyword(s):  
Surface Roughness ◽  
High Precision ◽  
High Efficiency ◽  
Slenderness Ratio ◽  
Flexible Production ◽  
Technology Research ◽  
Processing Efficiency ◽  
Stroke Length ◽  
Roundness Error ◽  
Cylindrical Grinding

The super-thin rod cylindrical grinding is a problem in the machining, super-thin rod with large slenderness ratio, poor rigidity, large roundness error after grinding, and with low processing efficiency. This study uses cylindrical honing processing super-thin rod parts, and designing the super-thin rod cylindrical honing head, carrying on a honing test. The results show that the super-thin rod cylindrical coarse honing capacity reach up to 0.002mm/double stroke(length 1698mm), surface roughness reach up to Ra 0.8 ~ 0.025μm after honing, roundness error reach up to 2μm. It fully shows that super-thin rod cylindrical honing technology has high precision, low surface roughness, flexible production processing and high efficiency.

scholarly journals Study on magnetorheological nano-polishing using low-frequency alternating magnetic field

2020 ◽  
Vol 12 (1) ◽  
pp. 168781401990072
Author(s):  
Jinzhong Wu ◽  
Shaohui Yin ◽  
Shengjie Yang ◽  
Yuanfan Guo
Keyword(s):  
Magnetic Field ◽  
Surface Roughness ◽  
High Efficiency ◽  
Rotation Speed ◽  
Low Frequency ◽  
Alternating Magnetic Field ◽  
Improvement Rate ◽  
Current Frequency ◽  
Magnetorheological Polishing ◽  
K9 Glass

With the development of electronics and optical industry, the high-efficiency ultra-precision polishing technologies of flat and curved surfaces are in high demand. The traditional magnetorheological polishing technology, using flexible polishing head, has the disadvantages of low polishing efficiency and small processing area. In this study, a novel tray-type magnetorheological polishing process using low-frequency alternating magnetic field excitation was developed to improve the efficiency of magnetorheological polishing for large surfaces and to make polishing magnetorheological cluster generate a cyclical fluctuation up and down, and then improve the cross-cutting effects of abrasives. With the developed excitation system, a large bowl-shaped varying magnetic field was generated in the working area, and the effects of current frequency, working gap, trough rotation speed, and workpiece rotation speed on the improvement rate of surface roughness and material removal rate were systematically investigated. A series of experiments were conducted on K9 glass specimens to verify the polishing performance. Experimental results show that the surface roughness of K9 glass was improved from 567.08 to 9.63 nm in 120 min.

A Study on Planarization Grinding Process Based on the Cluster Magnetorheological Effect

2011 ◽  
Vol 697-698 ◽  
pp. 44-48 ◽  
Author(s):  
Jie Wen Yan ◽  
Qiu Sheng Yan ◽  
Jia Bin Lu ◽  
Ling Ye Kong ◽  
Zhan Cheng Wu
Keyword(s):  
Optical Glass ◽  
Machining Process ◽  
Grinding Process ◽  
Machining Time ◽  
Grinding Method ◽  
Magnetorheological Effect ◽  
Mr Effect ◽  
Grinding Time

A new planarization grinding method based on the cluster magnetorheological (MR) effect is presented to grind optical glass in this paper. Some process experiments were conducted to reveal the influence of the speed of the grinding disc and grinding time and grinding pressure during the machining process. The results indicate that the speed of the grinding disc influences definitively on grinding effect of this planarization grinding method based on the cluster MR-effect. When the speed of the grinding disc is 110r/min, better machining effect can be achieved. Furthermore, the influence of the grinding time on machining effect is obviously, and the proper machining time is 6mins. However, under the experiment condition in this paper, the influence of grinding pressure on machining effect is unobvious.

Study of Semi-Bond Abrasive in Tiny Grinding Wheel Based on Magnetorheological Effect

2013 ◽  
Vol 395-396 ◽  
pp. 1040-1043
Author(s):  
Jing Fu Chai ◽  
Wen Qing Song ◽  
Qiong Zou
Keyword(s):  
Optical Glass ◽  
Removal Rate ◽  
Depth Of Cut ◽  
Grinding Wheel ◽  
Study Results ◽  
Ultra Precision ◽  
Magnetorheological Effect ◽  
Grinding Tool ◽  
Mr Effect ◽  
Grinding Time

To achieve ultra-precision machining efficiently, the tiny grinding wheel based on MR effect is used as a grinding tool. In this paper, the state of abrasive in cutting process was analyzed through modeling, and the grinding experiment was performed on the optical glass (K9). Study results show that, with the increasing of grinding time, the surface roughness of workpiece is reduced and tends to be uniform, but the material removal rate is reduced. The abrasive of tiny grinding wheel based on MR effect can automatically adjust its grinding pressure and depth of cut to improve the surface quality.

scholarly journals Application of passive damping fixture to the improvement of CNC drilling

2018 ◽  
Vol 169 ◽  
pp. 01036
Author(s):  
Shao-Yi Hsia ◽  
Chen-Chung Chang ◽  
Di-Hung Huang
Keyword(s):  
Surface Roughness ◽  
High Precision ◽  
Machine Tools ◽  
High Efficiency ◽  
International Competitiveness ◽  
Resonance Phenomenon ◽  
Good Effect ◽  
Interval Time ◽  
Machine Vibration ◽  
Vibration Problems

High precision and high efficiency are the essential competition conditions for multi-axis machine. However, machine vibration problems are always plagued by equipment manufacturers. This study focuses on solving or eliminating the multi-angle drilling vibration of processing machines. By the design and experiment combining CNC multi-axis machine tools with vibration tables, the surface roughness in the multi-angle drilling holes is discussed for the reference of the industry or the academia. The results indicated that adding proper vibration factors could effectively improve the bore surface roughness and smoothness. Roughness Ra with the vibration interval time 0.5 sec, could improve the surface roughness 48.95% of the processing hole, comparing to it without vibration. Besides, the resonance phenomenon disappears at the feed to generate good effect. It is expected to reduce various vibration problems faced by processing with machine tools in order to enhance the international competitiveness of processing tool manufacturers.

A New Method of Processing High-Precision Micro-Hole with the Femtosecond Laser

2012 ◽  
Vol 268-270 ◽  
pp. 382-386
Author(s):  
Xiao Jun Yang ◽  
Ming Li ◽  
Li Wang ◽  
Hua Long Zhao ◽  
Guang Hua Chen
Keyword(s):  
Surface Roughness ◽  
Femtosecond Laser ◽  
High Precision ◽  
High Efficiency ◽  
Surface Profile ◽  
Good Surface ◽  
Industry Applications ◽  
Micro Hole ◽  
Good Surface Roughness ◽  
Application Requirements

Based on the femtosecond laser processing technology and PZT driving scanning technology,high-precision micro- manufacturing technology is developed. By adjusting the laser parameters and scanning parameters to get micro-hole machining on the flat or curved surface. Hole’s size and surface morphology is observed by using phase contrast microscopy and scanning electron microscopy observations, and the surface roughness is analyzed by the surface profile instrument. The feasibility of diesel injector nozzle processing is verified in practical industry applications. The results show that this method of making micro hole has significant advantages, such as high precision, good consistency, without burrs, good surface roughness and high efficiency. These characteristics can meet the practical application requirements and can be used in various industrial fields.

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