1406 Ultra-precision Aspherical fabrication with ELID Grinding process for Gradient Index (GRIN) Lens

2006 ◽  
Vol 2006.4 (0) ◽  
pp. 29-30
Author(s):  
Yutaka WATANABE ◽  
Hitoshi OHMORI ◽  
Weimin LIN ◽  
Yoshihiro UEHARA ◽  
Shin-ya MORITA ◽  
...  
Keyword(s):  
Grinding Process ◽  
Gradient Index ◽  
Elid Grinding ◽  
Grin Lens ◽  
Ultra Precision

An Experiment of ELID Grinding process for Gradient Index (GRIN) Lens

2004 ◽  
Vol 2004.5 (0) ◽  
pp. 329-330
Author(s):  
Yutaka WATANABE ◽  
Weimin LIN ◽  
Toru SUZUKI ◽  
Shin-ya MORITA ◽  
Yoshihiro UEHARA ◽  
...  
Keyword(s):  
Grinding Process ◽  
Gradient Index ◽  
Elid Grinding ◽  
Grin Lens

Surface Behaviors of ELID Ground Engineering Ceramics

2007 ◽  
Vol 336-338 ◽  
pp. 1469-1472 ◽  
Author(s):  
Jian Yun Shen ◽  
Wei Min Lin ◽  
Hitoshi Ohmori ◽  
Xi Peng Xu
Keyword(s):  
Mechanical Properties ◽  
Material Properties ◽  
Material Removal ◽  
Grinding Process ◽  
Removal Mechanism ◽  
Material Removal Mechanism ◽  
Silicon Nitride Ceramic ◽  
Engineering Ceramics ◽  
Elid Grinding ◽  
Engineering Ceramic

In this study, grinding of Si3N4, SiC, and Al2O3 ceramics under the condition of electrolytic in-process dressing (ELID) system was investigated. The surface appearances of these engineering ceramics during the ELID grinding process were attentively observed to describe the formation of finely finished surfaces. Based on the analysis of material properties and detailed micro-observation of ground surfaces, it can be concluded that the material removal mechanism of engineering ceramic is closely related to its mechanical properties. The silicon nitride ceramic was most easily machined to precision surface among these three engineering ceramics.

Development on Micro Precision Truing Method of ELID-Grinding Wheel (2nd Report: Application to Edge Sharpening of Large Wheel)

2005 ◽  
Vol 291-292 ◽  
pp. 213-220 ◽  
Author(s):  
Shao Hui Yin ◽  
Wei Min Lin ◽  
Yoshihiro Uehara ◽  
Shinya MORITA ◽  
Hitoshi Ohmori ◽  
...  
Keyword(s):  
Surface Quality ◽  
Grinding Wheel ◽  
Grinding Process ◽  
Grinding Wheels ◽  
Elid Grinding ◽  
Diamond Grinding ◽  
Grinding Performance ◽  
Profile Accuracy ◽  
Large Wheel ◽  
Edge Sharpening

In V-groove ELID grinding process, to achieve optimal grinding performance and satisfactory surface quality and profile accuracy, metal bonded diamond grinding wheels need to be carefully sharpened. In this paper, we applied the proposed new micro-truing method consisting of electro-discharge truing and electrolysis-assisted mechanical truing to sharpen the edge of large grinding wheels. The minimum wheel tip radiuses of 6.3 and 8.5µm were achieved for the #4000 and #20000 grinding wheels. The truing mechanisms and sharpening performance are also discussed.

A Study of a New ELID Grinding Fluid by BP Neural Network Model

2011 ◽  
Vol 58-60 ◽  
pp. 1792-1796
Author(s):  
Wei Li ◽  
Yu Jie Fan
Keyword(s):  
Neural Network ◽  
Bp Neural Network ◽  
Grinding Wheel ◽  
Precision Grinding ◽  
Elid Grinding ◽  
Environmental Friendly ◽  
Grinding Fluid ◽  
Hard And Brittle Materials ◽  
Ultra Precision ◽  
Bp Neural Network Model

Electronic in-process dressing (ELID) grinding will be a main technology of ultra-precision grinding which has been widely adopted to the ultra-precision and high effectively machining of hard and brittle materials. This study puts forward a new environmental friendly bamboo charcoal bonded (BCB) grinding wheel and develops a new ELID grinding fluid. An oxide layer is mostly determined by the electric performance of grinding fluid in the experiment. This paper founds a model to forecast grinding fluid’s electric performance by BP neural network and MATLAB. This method can be used in developing of ELID grinding machining fluid to improve the ELID grinding effect.

Study on Material Removal Mechanism of Silicon Nitride during ELID Ultraprecision Grinding

2011 ◽  
Vol 314-316 ◽  
pp. 1740-1745
Author(s):  
Wei Dong Jin
Keyword(s):  
Silicon Nitride ◽  
Material Removal ◽  
Dynamic Balance ◽  
Grinding Process ◽  
Silicon Nitride Ceramic ◽  
Elid Grinding ◽  
Hard And Brittle Materials ◽  
Plastic Shearing ◽  
Material Removal Mode ◽  
Passivating Films

Based on the analyzing ultraprecision grinding process of hard and brittle materials, taking ELID grinding of silicon nitride ceramic as an example, active control technology of passivating films state was introduced in this paper. ELID ultraprecision grinding process respectively at adaptive dynamic balance mode, discontinuous electrolyzing mode and discontinuous grinding mode had been comparatively studied. By means of AFM used for analyzing surface topography of parts, studies show that material removal method for ELID grinding is always a combination of micro brittle fracture, plastic shearing, lapping and polishing action, and which is the main material removal mode depends on the actual grinding contact state. Finally, finishing surface generating mechanism for silicon nitride in ELID ultraprecision grinding was summed up.

Efficient Super-Smooth Finishing Characteristics of SiC Materials through the Use of Fine-Grinding

2009 ◽  
Vol 404 ◽  
pp. 137-141 ◽  
Author(s):  
H. Kasuga ◽  
Hitoshi Ohmori ◽  
Wei Min Lin ◽  
Y. Watanabe ◽  
T. Mishima ◽  
...  
Keyword(s):  
Silicon Carbide ◽  
Surface Analysis ◽  
Grinding Process ◽  
Structural Components ◽  
X Ray ◽  
Fine Grinding ◽  
Elid Grinding ◽  
Grinding Method ◽  
Wide Range ◽  
Experimental Parameters

Silicon carbide (SiC) materials have increasingly been needed in the wide range of industries, such as for structural components, automobile parts, space telescope, X-ray mirror, and next-generation semiconductors. However, SiC materials have difficulties in super-smooth finishing because of their hard and brittle characteristics. The authors have been investigating appropriate conditions on their finishing by fine-grinding with the unique grinding process called ELID (Electrolytic In-process Dressing) grinding method. The ELID grinding method has a stable grinding ability, so very detailed characteristics of their material-remove mechanisms were to be investigated. Surface analysis of each material has been discussed through the ELID, and this study proposes good finishing conditions for SiC. In this paper, the advantages of the applied fine-grinding are shown, and unique features on grinding characteristics of SiC through various grinding experimental parameters are described.

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