Study of the influence of tool rake angle in ductile machining of optical quartz glass

2019 ◽  
Vol 104 (1-4) ◽  
pp. 803-813 ◽  
Author(s):  
Xiaoguang Guo ◽  
Ruifeng Zhai ◽  
Renke Kang ◽  
Zhuji Jin ◽  
Dongming Guo
Keyword(s):  
Quartz Glass ◽  
Rake Angle ◽  
Ductile Machining ◽  
Optical Quartz Glass

Analysis of the Test Method of Quartz Glass Optical Homogeneity

2017 ◽  
Vol 726 ◽  
pp. 414-418
Author(s):  
Bo Fu ◽  
Hui Wang ◽  
Zhu Feng Shao
Keyword(s):  
Quartz Glass ◽  
Measurement Accuracy ◽  
Test Methods ◽  
Test Method ◽  
Wavefront Aberration ◽  
Optical Homogeneity ◽  
Advantages And Disadvantages ◽  
Interference Measurement ◽  
Optical Quartz Glass

The optical quartz glass is widely applied in optical system , photo communications，inertial navigation，etc.It must have high optical homogeneity. Optical homogeneity of the optical quartz glass directly affects the wavefront quality of the optical transmission system, and changes the wavefront aberration of the system. How to accurately determine the optical homogeneity of the quartz glass is especially important. Currently，the method of test for optical homogeneity mainly used by interference principle. This paper analyzes various existing interference measurement method and test equipment. Summarized the advantages and disadvantages of various test methods，using range and measurement accuracy.

scholarly journals An Iterative Size Effect Model of Surface Generation in Finish Machining

2020 ◽  
Vol 4 (3) ◽  
pp. 63 ◽  
Author(s):  
Ian Brown ◽  
Julius Schoop
Keyword(s):  
Surface Roughness ◽  
Machine Tool ◽  
Geometric Model ◽  
Three Dimensional ◽  
Experimental Tests ◽  
Rake Angle ◽  
Surface Generation ◽  
Nose Radius ◽  
Finish Machining ◽  
Ductile Machining

In this work, a geometric model for surface generation of finish machining was developed in MATLAB, and subsequently verified by experimental surface roughness data gathered from turning tests in Ti-6Al4V. The present model predicts the behavior of surface roughness at multiple length scales, depending on feed, nose radius, tool edge radius, machine tool error, and material-dependent parameters—in particular, the minimum effective rake angle. Experimental tests were conducted on a commercial lathe with slightly modified conventional tooling to provide relevant results. Additionally, the model-predicted roughness was compared against pedigreed surface roughness data from previous efforts that included materials 51CrV4 and AL 1075. Previously obscure machine tool error effects have been identified and can be modeled within the proposed framework. Preliminary findings of the model’s relevance to subsurface properties have also been presented. The proposed model has been shown to accurately predict roughness values for both long and short surface roughness evaluation lengths, which implies its utility not only as a surface roughness prediction tool, but as a basis for understanding three-dimensional surface generation in ductile-machining materials, and the properties derived therefrom.

Simulation of nanoscratch properties of optical quartz glass with molecular dynamics method

2015 ◽  
Vol 27 (2) ◽  
pp. 24150
Author(s):  
翟昌恒 Zhai Changheng ◽  
郭晓光 Guo Xiaoguang ◽  
金洙吉 Jin Zhuji ◽  
郭东明 Guo Dongming ◽  
张亮 Zhang Liang
Keyword(s):  
Molecular Dynamics ◽  
Quartz Glass ◽  
Molecular Dynamics Method ◽  
Optical Quartz Glass ◽  
Dynamics Method

3D Numerical Investigation of Thermally Assisted High Efficiency Ductile Machining of Brittle Materials

2013 ◽  
Author(s):  
J. Ma ◽  
Nathan Pelate ◽  
Shuting Lei
Keyword(s):  
High Efficiency ◽  
Rake Angle ◽  
Operating Conditions ◽  
Depth Of Cut ◽  
Nose Radius ◽  
Workpiece Temperature ◽  
Edge Radius ◽  
Ductile Machining ◽  
Ductile Regime Machining ◽  
Temperature Side

This study investigates the effects of four different variables (initial workpiece temperature, side rake angle, edge radius/feed rate, and nose radius/depth of cut) on ductile regime machining of a bioceramic material known as nanohydroxyapatite (nano-HAP) using 3D numerical simulation. AdvantEdge FEM Version 5.9 is used to conduct the simulation of turning of the nano-HAP. Tecplot 360 is used to analyze the results of the simulations. Because the workpiece is thin, the entire workpiece is set to a uniform initial temperature to simulate laser preheating of the material. By varying initial workpiece temperature, rake angle (side rake angle), edge radius, and nose radius, the effects of these operating conditions on pressure distribution (critical feed) are investigated. It is found that critical feed increases as initial workpiece temperature increases, and as negativity of rake angle increases. For the edge radius, the critical feed appears to increase with this parameter. For the nose radius, critical feed seems to be independent of it.

Analysis of Mechanical Property of Crystal CaF2 and Effects of Tool Rake Angle on Ductile Machining Process

2010 ◽  
Vol 126-128 ◽  
pp. 891-896 ◽  
Author(s):  
Ming Jun Chen ◽  
Wen Bin Jiang
Keyword(s):  
Orthogonal Cutting ◽  
Chip Thickness ◽  
Rake Angle ◽  
Machining Process ◽  
A Value ◽  
Ductile Machining ◽  
Shear Yield ◽  
Ultra Precision ◽  
Element Approach ◽  
Crystallographic Planes

Indentations on the three main crystallographic planes (100), (110), and(111) of CaF2 were analyzed. Appropriate material parameters were obtained by experimental load-displacement curves. The results show a value in the range of 70–110 MPa for the initial shear yield strength. The submicron-level orthogonal cutting process of CaF2 had been investigated by the finite element approach, and the effects of tool rake angle on cutting stress and chip formation were investigated. The results indicate that increasing the tool rake angle causes a significant increase in stress and a decrease in chip thickness. The simulation results from the present study show the optimal tool rake angle to the ultra-precision cutting of CaF2 is -20°.

Dielectric properties of optical quartz glass in the ultra-high frequency range and at temperatures of up to 1500�C

1971 ◽  
Vol 28 (3) ◽  
pp. 182-184 ◽  
Author(s):  
Yu. A. Polonskii ◽  
G. A. Pavlova ◽  
V. N. Savel'ev ◽  
T. V. Milovidova ◽  
V. B. Vinogradov
Keyword(s):  
Dielectric Properties ◽  
Quartz Glass ◽  
High Frequency ◽  
High Frequency Range ◽  
Frequency Range ◽  
Ultra High Frequency ◽  
Optical Quartz Glass

Effects of tool edge radius and rake angle on ductile machining process of CaF2

2011 ◽  
Vol 7 (3/4) ◽  
pp. 350 ◽  
Author(s):  
Mingjun Chen ◽  
Wenbin Jiang ◽  
Mingquan Li
Keyword(s):  
Rake Angle ◽  
Machining Process ◽  
Tool Edge Radius ◽  
Edge Radius ◽  
Ductile Machining ◽  
Tool Edge

scholarly journals Study on the subsurface damage mechanism of optical quartz glass during single grain scratching

2020 ◽  
Author(s):  
Ming Li ◽  
Xiaoguang Guo ◽  
Ruifeng Zhai ◽  
Xichun Luo ◽  
Renke Kang ◽  
...  
Keyword(s):  
Quartz Glass ◽  
Damage Mechanism ◽  
Subsurface Damage ◽  
Single Grain ◽  
Optical Quartz Glass
Sign in / Sign up

Export Citation Format

Share Document