scholarly journals Significance of Diamond as a Cutting Tool in Ultra-Precision Machining Process

2020 ◽  
Author(s):  
P. Suya Prem Anand
Keyword(s):  
Cutting Tool ◽  
Machining Process ◽  
Precision Machining ◽  
Ultra Precision

Ultra-Precision Machining of Dies for Microlens Arrays Using a Diamond Cutting Tool

2009 ◽  
Vol 407-408 ◽  
pp. 359-362 ◽  
Author(s):  
Takehisa Yoshikawa ◽  
Masayuki Kyoi ◽  
Yukio Maeda ◽  
Tomohisa Ohta ◽  
Masato Taya
Keyword(s):  
Cutting Tool ◽  
Diamond Tool ◽  
Liquid Crystal Displays ◽  
Precision Machining ◽  
Diamond Cutting ◽  
Microlens Arrays ◽  
Synchronous Control ◽  
Ultra Precision ◽  
Diamond Cutting Tool ◽  
Cutting Unit

Patterning of numerous microlenses on a surface improves the optical performance of components such as liquid crystal displays. A cutting method using a diamond tool is examined to fabricate a molding die that employs arbitrary array patterns to mold millions of microlenses. The present paper investigates machining of microlenses on the order of 2 kHz, using a piezo-actuated micro cutting unit and a synchronous control system of the cutting unit with an NC controller. Experiments using this system revealed that it is possible to machine a large number of microlenses on a molding die with high precision.

Study on Tool-Path Generation for Ultra-Precision Machining of Optical Lens Array

2012 ◽  
Vol 516 ◽  
pp. 595-599
Author(s):  
Kui Liu ◽  
Pei Ling Liu ◽  
Hu Wu ◽  
Kah Chuan Shaw
Keyword(s):  
Tool Path ◽  
Cutting Tool ◽  
Tool Path Generation ◽  
Numerical Control ◽  
Precision Machining ◽  
Path Generation ◽  
Software Platform ◽  
Optical Lens ◽  
Lens Array ◽  
Ultra Precision

In this study, a computer numerical control (CNC) programming software platform for ultra precision machining of optical surfaces was developed based on an MS Windows application framework and openGL. Using cylindrical coordinates, the tool path can be generated based on the polar angle, radius and a linear coordinate of the Z-axis, as well as cutting tool nose radius compensation. A 3D simulation based on tool path generation was developed for machining verification, which largely reduces the oscillation of the machine during the ultra precision machining process. Ultra precision machining of an optical lens array was carried out on a 5-axis ultra precision machining centre using a single crystalline diamond cutter. The experimental results indicated that the oscillation effect can be largely reduced using the cutting tool path using a super steady machining strategy. This software platform is designed as a framework, where the capability and functions can be expanded by adding in more freeform surface packages.

Research on the Machining Principle and Experinment of Ultrasonic Machining

2013 ◽  
Vol 373-375 ◽  
pp. 1983-1986
Author(s):  
Qiang Xiao
Keyword(s):  
Machining Process ◽  
Experimental Result ◽  
Precision Machining ◽  
Ultrasonic Machining ◽  
Result Show ◽  
Hard And Brittle Materials ◽  
Ultra Precision ◽  
The Common ◽  
Conventional Machining ◽  
Quality Surface

Ultrasonic machining is a non-conventional machining process. Ultrasonic machining offers an effective alternative for ultra precision machining of hard and brittle materials due to its unique characteristics. This paper did a comprehensive analysis on ultrasonic machining mechanism in theory. The experiment compared this ultrasonic machining process with the common machining process in surface quality is done and the experimental result show that the smooth high quality surface can be obtained under ultrasonic machining.

Identifying the Microtopographic Features Generated by Different Ultra-Precision Machining Techniques by Power Spectral Density

2014 ◽  
Vol 625 ◽  
pp. 73-78 ◽  
Author(s):  
Jian Chao Chen ◽  
Tao Sun
Keyword(s):  
Spectral Density ◽  
Power Spectral Density ◽  
Sample Surface ◽  
Silicon Wafers ◽  
Diamond Turning ◽  
Machining Process ◽  
Precision Machining ◽  
Power Spectral ◽  
Ultra Precision ◽  
Kdp Crystals

An atomic force microscope (AFM) was used to image the ultra-precision machined surfaces of K9 glasses, potassium dihydrogen phosphate (KDP) crystals, and silicon wafers. Each surface was generated by two machining techniques: (1) coarse-grain-sized diamond wheel grinding and regular polishing were used on K9 glasses; (2) single-point diamond turning and deliquescent polishing were performed on KDP crystals; (3) standard chemical mechanical polishing and atmospheric pressure low temperature plasma polishing were employed on silicon wafers. One-dimensional and two-dimensional power spectral densities (PSDs) of each sample surface were calculated from the measurement data. The influence of each machining process on the sample surface texture was analyzed based on the PSDs. The experiment results indicate that the power spectral density is a great guidance for the selection and improvement of ultra-precision machining techniques.

Wear of Coated Carbide Tools in the Ultra-Precision Machining of Stainless Steel

2005 ◽  
Author(s):  
W. Y. H. Liew ◽  
X. Ding
Keyword(s):  
Stainless Steel ◽  
Cutting Tool ◽  
Cutting Speed ◽  
Precision Machining ◽  
Mould Insert ◽  
Ultra Precision ◽  
Coated Carbide ◽  
Precision Machines ◽  
Coated Carbide Tools ◽  
Steel Mould

Ultra-precision machines are widely used to turn aspherical profiles on mould inserts for the injection moulding of optical lenses. During turning of a profile on a stainless steel mould insert, the cutting speed reduces significantly to 0 as the cutting tool is fed towards the center of the machined profile. This paper reports on experiments carried out to study the wear of uncoated, PVD-coated and CVD-coated carbide tools in the ultra-precision machining of STAVAX (modified AISI 420 stainless steel) at low speeds.

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