Evaluation of grinding-induced subsurface damage in optical glass BK7

The interaction between adjacent asperities is a typical characteristic of the grinding process and plays an important role in the material removal mechanism. Therefore, in order to systematically investigate the formation mechanism of the subsurface damage, a precision grinding contact model between the diamond particle and optical glass with adjacent asperities is proposed in our research. The initiation and propagation mechanism of median/lateral cracks under residual stress, the propagation rules of the stress waves on the subsurface, and the interaction between the subsurface damage under stress superposition effect are fully investigated by a theoretical analysis and finite element simulation. The simulation results of the precision grinding model are verified by experiments, which show that the proposed numerical analysis model is reasonable and the finite element analysis process is feasible.

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Theoretical and experimental investigation on surface generation and subsurface damage in fixed abrasive lapping of optical glass

International Journal of Mechanical Sciences ◽

10.1016/j.ijmecsci.2021.106941 ◽

2021 ◽

pp. 106941

Author(s):

Lin Bin ◽

Zhang Junpeng ◽

Cao Zhong-Chen ◽

Zhou Jiannan ◽

Huang Tian

Keyword(s):

Experimental Investigation ◽

Optical Glass ◽

Subsurface Damage ◽

Surface Generation ◽

Fixed Abrasive

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Experimental investigation of subsurface damage of optical glass in precision grinding using a brittle material removal fraction

The International Journal of Advanced Manufacturing Technology ◽

10.1007/s00170-016-9454-y ◽

2016 ◽

Vol 90 (1-4) ◽

pp. 725-730 ◽

Cited By ~ 6

Author(s):

Chen Jiang ◽

Jipeng Xu ◽

Chunhua Wang

Keyword(s):

Experimental Investigation ◽

Brittle Material ◽

Material Removal ◽

Optical Glass ◽

Subsurface Damage ◽

Precision Grinding ◽

Brittle Material Removal ◽

Removal Fraction

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Research on Laser Polishing of Optical Glass

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.154-155.1209 ◽

2010 ◽

Vol 154-155 ◽

pp. 1209-1212

Author(s):

Gui Wen Kang

Keyword(s):

Surface Integrity ◽

Glass Ceramic ◽

Glass Surface ◽

Optical Glass ◽

Subsurface Damage ◽

Future Application ◽

Enabling Technology ◽

Laser Polishing

With the development of photoelectron technology, optical glass and glass ceramic has been used in many different fields. The final machining of this kind of material has very important effect to its future application. In the present study, optical glass and glass ceramic is finished using laser polishing. Laser polishing could eliminate subsurface damage, smooth micro roughness. In certain cases a preheating system should be needed to increase optical glass’ surface integrity. The result shows that laser polishing of optical glass and glass ceramic has higher efficiency compared to conventional optical machining. The flexibility of laser polishing makes it ideal as an enabling technology for the final manufacturing of optical glass and glass ceramic.

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