Compensation of thermal drift during the single-point diamond turning process based on the LSTM

Optifab 2019 ◽  
2019 ◽  
Author(s):  
Woojong Yeo ◽  
Byeong-Joon Jeong ◽  
Seok-Kyeong Jeong ◽  
Jong-Gyun Kang ◽  
Sangwon Hyun ◽  
...  
Keyword(s):  
Single Point ◽  
Diamond Turning ◽  
Thermal Drift ◽  
Turning Process

ESCV cutting method during infrared crystal single point diamond turning process

2019 ◽  
Vol 48 (7) ◽  
pp. 742001
Author(s):  
王 朋 Wang Peng ◽  
薛栋柏 Xue Dongbai ◽  
张 昊 Zhang Hao ◽  
杨 坤 Yang Kun ◽  
李伟皓 Li Weihao ◽  
...  
Keyword(s):  
Single Point ◽  
Diamond Turning ◽  
Turning Process ◽  
Cutting Method

In Situ Measurement and Compensation Turning Technique of Deep MgF2 Conformal Dome

2014 ◽  
Vol 1027 ◽  
pp. 136-139
Author(s):  
Deng Chao Zhu ◽  
Yi Fan Dai ◽  
Chao Liang Guan ◽  
Gui Lin Wang ◽  
Gui Peng Tie
Keyword(s):  
Measurement System ◽  
Single Point ◽  
Diamond Turning ◽  
Machining Process ◽  
Shape Error ◽  
Turning Process ◽  
Compensation Process ◽  
Surface Test ◽  
Machining Characteristics

The adoption of conformal optics system can evidently improve the synthetical performance of infrared missiles. Hot-pressing poly-crystal magnesium fluoride (MgF2) is an ideal material for conformal optics dome. But many problems about machining and surface test of deep aspheric surface have not been solved at present, and there is not much research about the machining characteristics of MgF2 material. In this paper, in-situ measurement system is designed, so positional errors that introduced by repeating installation can be avoided. Then, machining process of MgF2 material by single point diamond turning is studied, and optimized diamond turning process is proposed by experiments in order to obtain low surface roughness. Furthermore, surface accuracy is tested by on-machine measurement system. Based on the result, error compensation process of conformal dome is carried out. Finally, the shape error of the dome is less than 0.8μm PV.

A multi–strain-rate damage model on fracture prediction in single-point diamond turning process

2020 ◽  
Vol 110 (9-10) ◽  
pp. 2753-2765
Author(s):  
J. Q. Ran ◽  
G. Q. Zhang ◽  
G. P. Chen ◽  
J. L. Wang ◽  
B. L. Deng ◽  
...  
Keyword(s):  
Strain Rate ◽  
Single Point ◽  
Damage Model ◽  
Diamond Turning ◽  
Fracture Prediction ◽  
Turning Process
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