scholarly journals Performance evaluation and optimization of a fast tool servo for single point diamond turning machines

1997 ◽  
Author(s):  
Arthur C. Miller, Jr. ◽  
James F. Cuttino
Keyword(s):  
Performance Evaluation ◽  
Single Point ◽  
Diamond Turning ◽  
Fast Tool Servo ◽  
Diamond Turning Machines

Freeform machining of ophthalmic toric lens mould using fast tool servo-assisted ultra-precision diamond turning process

2020 ◽  
pp. 251659842093974
Author(s):  
Ishan Anand Singh ◽  
Gopi Krishna S. ◽  
T. Narendra Reddy ◽  
Prakash Vinod
Keyword(s):  
Surface Roughness ◽  
Single Point ◽  
Measurement Data ◽  
Surface Profile ◽  
Diamond Turning ◽  
Fast Tool Servo ◽  
Toric Surface ◽  
Machined Surface ◽  
Ultra Precision ◽  
A Minor

This research aims to establish a methodology for machining of toric lenses, using fast tool servo-assisted single point diamond turning and to assess the generated surface for its characteristics. Using the established mathematical model, toric surface is explained to understand the geometry and to generate the parameters required for fast tool servo machining. A toric surface with a major diameter of 18.93 mm and a minor diameter of 15.12 mm has been cut on the intelligent ultra-precision turning machine (iUPTM). The surface profile and surface roughness were measured. After analysing the measurement data of the machined surface, on two perpendicular axes of the toric lens, form accuracy of 0.49 µm peak-to-valley (PV), and surface roughness of 12 nm in Ra, 4–8 nm in Sa are obtained. From the experimental results obtained, it can be concluded that the proposed method is a reasonable alternative for manufacturing toric lens mould.

A Study of Tool Path Generation for Machining of Precision Roller with Wavy Patterned Microstructures by Slow Tool Servo

2016 ◽  
Vol 679 ◽  
pp. 191-197
Author(s):  
Ling Bao Kong ◽  
Chi Fai Cheung ◽  
Wing Bun Lee ◽  
Suet To ◽  
Su Juan Wang ◽  
...  
Keyword(s):  
Tool Path ◽  
Single Point ◽  
Research Work ◽  
Axial Direction ◽  
Diamond Turning ◽  
Machining Process ◽  
Fast Tool Servo ◽  
Roller Surface ◽  
Ultra Precision ◽  
Slow Tool Servo

Embossing by patterned rollers is one of the most efficient machining approaches for manufacturing plastic films with patterned microstructures, and the precision roller with patterned microstructures is the key tooling component in the roll-to-roll process. Single-point diamond turning with a slow or fast tool servo is an enabling and efficient ultra-precision machining process to fabricate microstructures through a simple process to achieve optical surface finish directly. Most of the current studies on slow or fast tool servo machining processes either focus on face machining of patterned microstructures, or on tool servo machining of microstructures in the radial direction of precision rollers. Relatively little research work is found in relation to machining patterned microstructures on a precision roller by using the tool servo in the axial direction. This paper presents a pilot study on the development of a tool path generator for machining precision rollers with wavy patterned microstructures by using slow tool servo machining in the axial direction on a precision roller. The machining mechanism is firstly explained, based on which the tool path generator is developed for machining wavy patterned microstructures on a precision roller surface. Preliminary experimental work was conducted to study the generation of wavy patterned microstructures on a precision roller using a four-axis ultra-precision machine. The machined wavy microstructures on the roller surface are measured and analyzed to successfully validate the performance of the proposed tool path generator.

Research on Mathematical Models of New Diamond Turning for Non-Axisymmetric Aspheric Mirrors

2007 ◽  
Vol 364-366 ◽  
pp. 35-38 ◽  
Author(s):  
Cheng Shun Han ◽  
Long Jiang Zhang ◽  
Shen Dong
Keyword(s):  
High Resolution ◽  
Mathematical Models ◽  
Diamond Tool ◽  
Diamond Turning ◽  
Fast Tool Servo ◽  
Aspheric Surfaces ◽  
Nc Program ◽  
Ultra Precision ◽  
Diamond Turning Machines ◽  
New Generation

In this paper, a new generation method for diamond turning non-axisymmetry aspheric mirrors is introduced. A rotary arm that carried a diamond tool combined with fast tool servo was used to replace the straight guides employed by most diamond turning machines. The micro linear feed of the fast tool servo was real-time calculated with the use of high resolution angular feedback on the work spindle and the swing tool. Synchronized motion of the fast tool servo according to rotating angles of the workpiece and the diamond tool produced ultra-precision non-axisymmetry aspheric surfaces. The corresponding mathematical models of NC program are presented.

Tri-axial Fast Tool Servo Using Hybrid Electromagnetic-Piezoelectric Actuation for Diamond Turning

2021 ◽  
pp. 1-1
Author(s):  
Zi-Hui Zhu ◽  
Li Chen ◽  
Yuhan Niu ◽  
Xiaonan Pu ◽  
Peng Huang ◽  
...  
Keyword(s):  
Diamond Turning ◽  
Piezoelectric Actuation ◽  
Fast Tool Servo
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