Ultra-Precision Finishing of Micro Aspherical Surface by Ultrasonic Vibration Assisted Polishing

2005 ◽  
pp. 349-354
Author(s):  
H. Suzuki ◽  
R. Kawamori ◽  
M. Miyabara ◽  
T. Okino ◽  
Yasuto Hijikata ◽  
...  
Keyword(s):  
Ultrasonic Vibration ◽  
Aspherical Surface ◽  
Ultra Precision ◽  
Precision Finishing

Ultra-Precision Finishing of Micro Aspherical Surface by Ultrasonic Vibration Assisted Polishing

2005 ◽  
Vol 291-292 ◽  
pp. 349-354 ◽  
Author(s):  
H. Suzuki ◽  
R. Kawamori ◽  
M. Miyabara ◽  
T. Okino ◽  
Yasuto Hijikata ◽  
...  
Keyword(s):  
Digital Image ◽  
Diamond Wheel ◽  
Optical Devices ◽  
Image Sensors ◽  
Aspherical Surface ◽  
Digital Devices ◽  
Ultrasonic Assisted ◽  
Ultra Precision ◽  
Glass Lenses ◽  
Precision Finishing

Micro axis-symmetric aspherical glass lenses are being increasingly used in digital devices and optical devices. The glass lenses are molded by using micro ceramic dies such as tungsten carbide [1].Recently, as the pixel number of digital image sensors increases, the accuracy of micro molding dies are required to be much more precise than ever [2]. In this study, ultrasonic assisted polishing method is proposed and developed in order to finish micro axis-symmetric aspherical dies which were pre-ground with a diamond wheel [3]. In this paper, the proposed polishing method was applied to the micro aspherical molding dies to finish form compensation processing.

Ultra-Precision Finishing by Magnetic Abrasive Finishing Process

2018 ◽  
Vol 5 (5) ◽  
pp. 12426-12436 ◽  
Author(s):  
K. Naveen ◽  
Vignesh V. Shanbhag ◽  
N. Balashanmugam ◽  
Prakash Vinod
Keyword(s):  
Magnetic Abrasive Finishing ◽  
Finishing Process ◽  
Abrasive Finishing ◽  
Ultra Precision ◽  
Precision Finishing

Experiment and Discussion on Ultrasonic Vibration-Assisted Single Point Diamond Turning of Die Steels

2012 ◽  
Vol 497 ◽  
pp. 1-5
Author(s):  
Xiao Dan Xie ◽  
Yong Li ◽  
Cam Vinh Duong ◽  
Ahmed Al-Zahrani
Keyword(s):  
Tool Wear ◽  
Ultrasonic Vibration ◽  
Single Point ◽  
Cutting Parameters ◽  
Diamond Turning ◽  
Machining Process ◽  
Die Steels ◽  
Ultra Precision ◽  
Promising Solution ◽  
Vibration Parameters

Traditionally, single point diamond turning (SPDT) can not process ferreous metals because of acute tool wear. Ultrasonic vibration-assisted cutting(UVC) provides a promising solution for the problem. In this paper, for the aim of directly obtaining mirror surface on die steels, UVC method was used combining with SPDT process. Experiments were carried out on an ultra precision turning machine, cutting parameters and vibration parameters were well-chosen, and two kind of feed rates, two kinds of prevailing die steels were experimented. Mirror surfaces were successfully achieved on face turning, with the best roughness of Ra16.6nm. And the surface roughness, surface texture and tool wear in machining process were discussed.

Multi-Axis Controlled Ultraprecision Machining and Measurement

2009 ◽  
Vol 3 (3) ◽  
pp. 227-232 ◽  
Author(s):  
Hirofumi Suzuki ◽  
Keyword(s):  
Ultrasonic Vibration ◽  
Measuring System ◽  
Precision Machining ◽  
Ultraprecision Machining ◽  
Optical Components ◽  
Contact Type ◽  
Digital Devices ◽  
Ultra Precision ◽  
Micro Lens Array ◽  
Micro Lens

Demands of micro aspheric optical components such as lenses and mirrors are increasing for installing to the digital devices. As the devices become to be more compact and complicated, the molds shapes of lens and mirrors would become more difficult to be machined and measured. In this study, multi-axis controlled ultra precision machining/grinding and on-machine measurement technologies are developed for manufacturing of the complicated and micro molds. In this paper, the next four technologies are focused: (1) micro fresnel grinding, (2) Micro lens array grinding, (3) Ultrasonic vibration assisted polishing, and (4) Contact type of multi axis controlled on-machine measuring system.

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