Evaluation of surface quality by using servo information in ultra-precision grinding of optical glass lenses

2019 ◽  
Vol 2019 (0) ◽  
pp. S13308P
Author(s):  
Mitsuru KURIYAMA ◽  
Masahiko FUKUTA ◽  
Katsutoshi TANAKA ◽  
Yasuhiro KAKINUMA
Keyword(s):  
Surface Quality ◽  
Optical Glass ◽  
Precision Grinding ◽  
Ultra Precision ◽  
Glass Lenses

Basic Study on High Efficiency Ultra-Precision Grinding of the Optical Glass Lens

2014 ◽  
Vol 1017 ◽  
pp. 21-26 ◽  
Author(s):  
Rei Sekiguchi ◽  
Shun Yoshikawa ◽  
Yasuhiro Kakinuma ◽  
Katsutoshi Tanaka ◽  
Masahiko Fukuta
Keyword(s):  
Surface Quality ◽  
High Efficiency ◽  
Optical Glass ◽  
High Surface ◽  
Precision Grinding ◽  
Form Accuracy ◽  
Large Aperture ◽  
Highly Efficient ◽  
Ultra Precision ◽  
Glass Lenses

The demand for large aperture lenses with high surface quality and form accuracy used for single-lens reflex cameras has been increasing. Generally, large aperture glass lenses are produced by ultra-precision grinding. Considering the increasing global competition, the grinding process has to be improved. However, highly efficient grinding causes worse surface quality, which leads to much polishing and ultimately results in lower form accuracy. Thus in this study, aiming at the realization of highly efficient and precise grinding of glass lenses, cross grinding of optical glass BK7 is carried out. As a first step of the study, the influence of grinding conditions on the surface quality is investigated experimentally.

scholarly journals Influence of servo characteristics on crack generation in ultra-precision grinding of optical glass lenses

Procedia CIRP ◽  
2018 ◽  
Vol 77 ◽  
pp. 130-133
Author(s):  
Takumi Suetomi ◽  
Yasuhiro Kakinuma ◽  
Masahiko Fukuta ◽  
Katsutoshi Tanaka
Keyword(s):  
Optical Glass ◽  
Precision Grinding ◽  
Crack Generation ◽  
Ultra Precision ◽  
Glass Lenses

Ultra-precision grinding of optical glass lenses with La-doped CeO2 slurry

CIRP Annals ◽  
2019 ◽  
Vol 68 (1) ◽  
pp. 345-348 ◽  
Author(s):  
Yasuhiro Kakinuma ◽  
Yoshiki Konuma ◽  
Masahiko Fukuta ◽  
Katsutoshi Tanaka
Keyword(s):  
Optical Glass ◽  
Precision Grinding ◽  
Ultra Precision ◽  
Doped Ceo2 ◽  
Glass Lenses ◽  
La Doped

The Research of ELID Grinding Effect and Surface Quality on Carbonized Cold-Rolled Steel

2012 ◽  
Vol 229-231 ◽  
pp. 542-546
Author(s):  
J.L. Guan ◽  
Li Li Zhu ◽  
H.W. Lu ◽  
Zhi Wei Wang
Keyword(s):  
Surface Roughness ◽  
Surface Quality ◽  
Grinding Wheel ◽  
Rolled Steel ◽  
Precision Grinding ◽  
Cold Rolled Steel ◽  
Elid Grinding ◽  
Peripheral Velocity ◽  
Ultra Precision ◽  
Cold Rolled

In this document, the electrolytic in-process dressing ( ELID ) grinding technique is used for ultra-precision processing experimental research on the carbonized cold-rolled steel (HRC60～80).A surface roughness of Ra6～8nm was obtained after ELID precision grinding. The results proved that adopting micro grain size (W1.5～W36) and high hardness cast iron based diamond grinding wheel, increasing the wheel peripheral velocity (18～20m/s) and reducing grinding depth can effectively improve surface quality and bring the surface roughness down. The wheel peripheral velocity, grinding depth as well as grinding fluid are the main factors during ultra-precision grinding.

Stick-Slip Simulation of Feeding System in Silicon Ultra-Precision Grinding Machine

2012 ◽  
Vol 566 ◽  
pp. 530-533
Author(s):  
Zhi Hua Sha ◽  
Shao Xing Zhang ◽  
Yi Wang ◽  
Sheng Fang Zhang
Keyword(s):  
Surface Quality ◽  
Silicon Wafer ◽  
Crystalline Silicon ◽  
Virtual Prototype ◽  
Feeding System ◽  
Precision Grinding ◽  
Stick Slip ◽  
Machining Precision ◽  
Ultra Precision ◽  
Grinding Machine

Mono-crystalline silicon is the typical substrate material in integrated circuits manufacturing, and machining precision and surface quality of the silicon wafer impacts on the quality and performance of the electronic products directly. Silicon grinding technology has high accuracy, low cost and can obtained high surface quality, which has become the mainstream of silicon ultra-precision machining. Stick-slip of feeding system in silicon ultra-precision grinding machine is an important factor which influencing the machining precision of the silicon wafer. In this paper, based on the structure analysis of feeding system in a certain type of silicon ultra-precision grinding machine, the rigid body coupling virtual prototype model of the feeding system is established using ADAMS, the factors which influencing the stick-slip is analyzed deeply via the dynamic simulation of the virtual prototype.

Research on Precision Mirror Machining Technology for W-Mo Alloy

2011 ◽  
Vol 487 ◽  
pp. 303-307
Author(s):  
Jia Liang Guan ◽  
H.W. Lu ◽  
X.H. Xiao ◽  
Y.C. Wu ◽  
Z.D. Chen
Keyword(s):  
Surface Quality ◽  
Formation Mechanism ◽  
Rotational Speed ◽  
Precision Machining ◽  
Work Piece ◽  
Mirror Surface ◽  
Precision Grinding ◽  
Elid Grinding ◽  
Ultra Precision

A new way of precision machining was studied through the experiments of Electrolytic In-Process Dressing (ELID) precision grinding and ultra precision lapping and polishing for W-Mo metal alloy. First a 22nm(Ra) surface was obtained through the ELID grinding, last a 11nm(Ra) surface was obtained after the process of lapping and polishing with 0.1～0.3 N/cm2pressure, 60～100 r/min rotational speed and other optimized parameters. Meanwhile, the formation mechanism of ultra precision mirror surface of the alloy was also analyzed. The experiments prove surface quality of the work piece was guaranteed by ELID grinding, and which was also greatly affected by some parameters in lapping and polishing such as pressure, rotational speed.

Fabrication of Micro V-Grooves in Ultra-Precision Grinding

2016 ◽  
Vol 679 ◽  
pp. 179-183
Author(s):  
Ze Qin Lin ◽  
Su Juan Wang ◽  
Xin Du Chen
Keyword(s):  
Fiber Optics ◽  
Surface Quality ◽  
Prediction Models ◽  
High Surface ◽  
Surface Generation ◽  
Precision Grinding ◽  
High Surface Quality ◽  
Ductile Mode ◽  
Ultra Precision ◽  
General Aspects

Ultra-precision grinding is an effective method to machine the optical micro v-groove, which is one of microstructures applied to the fiber-optics connectors, displays and other photonics devices. The ultra-precision grinding technology directly obtains high surface quality for brittle materials when the grinding process is under the ductile mode. This paper introduces general aspects of ultra-precision grinding technology in the fabrication of the micro v-grooves structures and introduces the essential features of ultra-precision grinding. The process of the manufacturing of the optical micro v-grooves components is presented in this paper. It contains the prediction models of surface roughness and form accuracy in the ultra-precision grinding and the optimization model under the consideration of the influences of grinding parameters,grinder factors and the material properties on the surface quality and machining efficiency. This study therefore contributes to providing a further understanding on the mechanisms of material removal and surface generation in ultra-precision girnding.

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