scholarly journals Precision Grinding of Micro Fresnel Lens Molding Die. Feasibility Study on Precision Grinding of Tungsten Carbide.

1999 ◽  
Vol 65 (8) ◽  
pp. 1163-1168 ◽  
Author(s):  
Hirofumi SUZUKI ◽  
Toshiro HIGUCHI ◽  
Naoshi WAJIMA ◽  
Takayuki KITAJIMA ◽  
Shigeki OKUYAMA ◽  
...  
Keyword(s):  
Tungsten Carbide ◽  
Feasibility Study ◽  
Fresnel Lens ◽  
Precision Grinding ◽  
Lens Molding

Precision Grinding of Structured Tungsten Carbide Mold

2012 ◽  
Vol 497 ◽  
pp. 15-19 ◽  
Author(s):  
Hirofumi Suzuki ◽  
Tatsuya Furuki ◽  
Mutsumi Okada ◽  
Yutaka Yamagata ◽  
Shinya MORITA
Keyword(s):  
Tungsten Carbide ◽  
Power Efficiency ◽  
Fresnel Lens ◽  
Rare Metal ◽  
Diamond Wheel ◽  
Precision Grinding ◽  
Form Accuracy ◽  
Molding Method ◽  
Grinding Method ◽  
Glass Lens

Demands of glass Fresnel lens is increasing in solar panel in order to increase power efficiency. Glass lens is usually molded by glass molding method with tungsten carbide molds. In this study, large Fresnel lens molds made of tungsten carbide are tested to be ground by simultaneous 2-axis (Y, Z) controlled grinding method. The resinoid bonded diamond wheel was trued with a rare metal truer to improve the sharpness of the wheel edge. In the grinding test of the tungsten carbide mold, a form accuracy of less than 0.8 μm P-V and surface roughness of 18 nm Rz were obtained, and it is clarified that the proposed grinding method is useful for the Fresnel grinding.

scholarly journals Precision Grinding of Micro Fresnel Lens Molding Die (2nd Report)

2007 ◽  
Vol 73 (6) ◽  
pp. 688-692 ◽  
Author(s):  
Yuji YAMAMOTO ◽  
Hirofumi SUZUKI ◽  
Toshimichi MORIWAKI ◽  
Tadashi OKINO ◽  
Toshiro HIGUCHI
Keyword(s):  
Fresnel Lens ◽  
Precision Grinding ◽  
Lens Molding

High Precision Grinding of Large Fresnel Lens Mold

2012 ◽  
Vol 516 ◽  
pp. 629-633
Author(s):  
Tatsuya Furuki ◽  
Hirofumi Suzuki ◽  
Mutsumi Okada ◽  
Yutaka Yamagata ◽  
Shinya MORITA
Keyword(s):  
Tungsten Carbide ◽  
Power Efficiency ◽  
Fresnel Lens ◽  
Rare Metal ◽  
Diamond Wheel ◽  
Precision Grinding ◽  
Form Accuracy ◽  
Grinding Method ◽  
Fresnel Lenses ◽  
Glass Lenses

Demand for glass Fresnel lenses is increasing in solar panel manufacture in order to increase power efficiency. Glass lenses are usually moulded using a glass moulding method with tungsten carbide moulds. In this study, large Fresnel lens moulds made of tungsten carbide are tested to be ground by a simultaneous 2-axis (Y, Z) controlled grinding method. The resinoid bonded diamond wheel is trued with a rare metal truer to increase the sharpness of the wheel edge. In the grinding test of the tungsten carbide mould, a form accuracy of less than 0.8 μm P-V and surface roughness of 18 nm Rz are obtained, and it is clarified that the proposed grinding method is useful for Fresnel grinding.

Ultra Precision Grinding of Wafer Scale

2012 ◽  
Vol 516 ◽  
pp. 257-262
Author(s):  
Martin Hünten ◽  
Fritz Klocke ◽  
Olaf Dambon ◽  
Benjamin Bulla
Keyword(s):  
Tungsten Carbide ◽  
Surface Topography ◽  
Precision Grinding ◽  
Wafer Scale ◽  
Advantages And Disadvantages ◽  
Grinding Processes ◽  
Ultra Precision ◽  
Grinding Tool ◽  
Glass Optics ◽  
Grinding Machine

Manufacturing moulds for the wafer-scale replication of precision glass optics sets new demands in terms of grinding tool lifetime and the processes to be applied. This paper will present different approaches to grinding processes and kinematics to machine wafer-scale tungsten carbide moulds with diameters of up to 100 mm and more than 100 single aspheric cavities, each featuring form accuracies in the micron range. The development of these processes will be described and advantages and disadvantages of the approaches derived from practical tests performed on an ultra precision grinding machine (Moore Nanotech 350FG) will be discussed. Finally, a comparison between the developed processes is made where achieved form accuracies and surface topography are analyzed.

Precision Vertical Grinding of Cemented Tungsten Carbide Using CBN Wheels

2013 ◽  
Vol 303-306 ◽  
pp. 2481-2484
Author(s):  
Zhi Jian He ◽  
Xu Kun Liang
Keyword(s):  
Surface Roughness ◽  
Boron Nitride ◽  
Tungsten Carbide ◽  
Cubic Boron Nitride ◽  
Grinding Wheel ◽  
Precision Grinding ◽  
Grinding Parameters ◽  
Cbn Grinding Wheel ◽  
Important Significance ◽  
Cemented Tungsten Carbide

A set of precision vertical grinding experiment on WC-CO cemented tungsten carbide materials was carried out using cubic boron nitride (CBN) grinding wheel. Different grinding parameters such as rotation speeds of workpiece, feed rates and grinding depths were employed during precision vertical grinding. Surface roughness was measured for studying the grinding charateristics of WC-CO cemented tungsten carbide in this removal mode. Optimal grinding parameters were obtained by changing the process parameters. The research results have an important significance to improve grinding quality and efficiency for precision grinding cemented tungsten carbide materials.

scholarly journals Study on Precision Grinding of Micro Aspherical Surface. Feasibility Study of Micro Aspherical Surface by Inclined Rotational Grinding.

1998 ◽  
Vol 64 (4) ◽  
pp. 619-623 ◽  
Author(s):  
Hirofumi SUZUKI ◽  
Sunao KODERA ◽  
Shigeki MAEKAWA ◽  
Noriko MORITA ◽  
Eichi SAKURAI ◽  
...  
Keyword(s):  
Feasibility Study ◽  
Precision Grinding ◽  
Aspherical Surface

scholarly journals Precision Glass Molding of Micro Fresnel Lens. Experimental Study on Molding Characteristics with Molding Conditions and Feasibility Study.

2001 ◽  
Vol 67 (3) ◽  
pp. 438-443 ◽  
Author(s):  
Hirofumi SUZUKI ◽  
Toshinao KAMANO ◽  
Toshiro HIGUCHI ◽  
Tetsuya TANIOKA ◽  
Kazuhiro SHIMAMURA ◽  
...  
Keyword(s):  
Experimental Study ◽  
Feasibility Study ◽  
Fresnel Lens ◽  
Glass Molding ◽  
Precision Glass Molding

Influence of Ultrasonic Assisted Processing on the Ductility of Binderless Tungsten Carbide

2014 ◽  
Vol 625 ◽  
pp. 587-592 ◽  
Author(s):  
Benjamin Bulla ◽  
Fritz Klocke ◽  
Olaf Dambon
Keyword(s):  
Tungsten Carbide ◽  
Diamond Turning ◽  
Manufacturing Technology ◽  
Cutting Process ◽  
Precision Grinding ◽  
Ultrasonic Assisted ◽  
Ultra Precision ◽  
High Predictability ◽  
Grinding Technique

For the production of mould inserts for precision glass moulding, the ultra precision grinding technique with a subsequent manual polishing operation is typically applied. These processes are time consuming and have a relatively low reproducibility. An alternative manufacturing technology, with a high predictability and efficiency, which additionally allows a higher geometrical flexibility, is the diamond turning technique. In addition the ultrasonic assisted ultra precision cutting process has already proven its potential for machining difficult-to-cut materials, such as steel and glass. By applying the ultrasonic assistance, the classic constraints of the process can be widened significantly. In this publication the process is applied on binderless, nanocrystalline tungsten carbide.

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