Forced-based tool deviation induced form error identification in single-point diamond turning of optical spherical surfaces

2021 ◽  
Author(s):  
Yuqi Dai ◽  
Jiankai Jiang ◽  
Guoqing Zhang ◽  
Tong Luo
Keyword(s):  
Single Point ◽  
Diamond Turning ◽  
Form Error ◽  
Error Identification ◽  
Spherical Surfaces

VSPDT: An Optimizer for Single Point Diamond Turning

2007 ◽  
Vol 339 ◽  
pp. 447-452
Author(s):  
Jian Guang Li ◽  
Wing Bun Lee ◽  
Chi Fai Cheung ◽  
Sandy To ◽  
J.J. Du ◽  
...  
Keyword(s):  
New Product Development ◽  
Functional Performance ◽  
Single Point ◽  
Cutting Parameters ◽  
Diamond Turning ◽  
Virtual Manufacturing ◽  
Form Error ◽  
Ultra Precision ◽  
Virtual Workpiece ◽  
Optimal Cutting Parameters

Virtual manufacturing (VM), which primarily aimed at reducing the lead times to market and costs associated with new product development, offers various test-beds for the time-consuming and expensive physical experimentation. Since surface roughness and form accuracy play essential roles in the functional performance of the products machined with ultra-precision machining technology. An optimizer, VSPDT (virtual single point diamond turning) system was developed for the purpose of form error compensation and optimal cutting parameters selection. In this paper, the keys issues for developing VSPDT using virtual manufacturing technology were highlighted such as framework of system, virtual workpiece, virtual machining and inspection, etc. At the end of the paper, A VSPDT was developed and applied to predict and compensate the form error, select optimal cutting parameters by using a 2-axis CNC ultra-precision turning machine.

Simulation of Large Scale KDP Crystal Polishing by Computer Controlled Micro-Nano Deliquescence

2012 ◽  
Vol 497 ◽  
pp. 165-169 ◽  
Author(s):  
He Ping Zhang ◽  
Dong Ming Guo ◽  
Xu Wang ◽  
Hang Gao
Keyword(s):  
Large Scale ◽  
Surface Condition ◽  
Single Point ◽  
Damage Threshold ◽  
Diamond Turning ◽  
Water Soluble ◽  
Optical Elements ◽  
Kdp Crystal ◽  
Computer Controlled ◽  
Laser Induced Damage

Although Single Point Diamond Turning (SPDT) can do pretty well in optical surfacing of large scale KDP crystal, both the surface accuracy and integrity are considerably high; meanwhile as the defects of micro-waveness and stress are inevitable, the laser-induced damage threshold of KDP optical elements after SPDT still cannot be satisfied. Because of the characters of deliquescent and water-soluble, the process of computer controlled Micro-nano deliquescence is attempted to remove the residual micro-waveness on KDP surface after SPDT. Based on the assumption of Preston and the characters of Micro-nano deliquescence, the model of material removal ratio is suggested, the dwell time for ascertained KDP surface is solved, the processing of computer controlled Micro-nano deliquescence is simulated and the processed surface condition on theory is obtained. Besides, the influences of different parameters on the surfacing efficiency and accuracy are analyzed. Finally, three polishing tracks are comparatively analyzed. The simulation results are quite important in guiding the experimental polishing of large scale KDP by computer controlled Micro-nano deliquescence

Tool interference at workpiece centre in single-point diamond turning

2019 ◽  
Vol 151 ◽  
pp. 1-12 ◽  
Author(s):  
Guoqing Zhang ◽  
Yuqi Dai ◽  
Suet To ◽  
Xiaoyu Wu ◽  
Yan Lou
Keyword(s):  
Single Point ◽  
Diamond Turning ◽  
Tool Interference
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