Size effect on surface generation of multiphase alloys in ultra-precision fly cutting

2020 ◽  
Vol 60 ◽  
pp. 23-36
Author(s):  
Guoqing Zhang ◽  
Jiaqi Ran ◽  
Suet To ◽  
Xiaoyu Wu ◽  
Peng Huang ◽  
...  
Keyword(s):  
Size Effect ◽  
Surface Generation ◽  
Fly Cutting ◽  
Multiphase Alloys ◽  
Ultra Precision

scholarly journals A prediction model of the surface topography due to the unbalance of the spindle system in ultra-precision fly-cutting machining

2018 ◽  
Vol 10 (1) ◽  
pp. 168781401774714
Author(s):  
Dongju Chen ◽  
Xianxian Cui ◽  
Ri Pan ◽  
Jinwei Fan ◽  
Chenhui An
Keyword(s):  
Prediction Model ◽  
Surface Topography ◽  
Rotation Speed ◽  
Surface Generation ◽  
Machining Accuracy ◽  
Machined Surface ◽  
Spindle System ◽  
Fly Cutting ◽  
Ultra Precision ◽  
Aerostatic Spindle

In ultra-precision fly-cutting machining, the aerostatic spindle is the key component, which has significant influence on the machined surface quality. The unbalanced spindle directly affects the machining accuracy. In this article, a prediction model of machining surface topography is proposed which involves the effect of the gas film performance of spindle in microscale. With the Weierstrass function, unstable transient response of the aerostatic spindle system is derived by the motion model of the spindle, which response signal represents the surface profile in the ultra-precision machining. Meanwhile, the experiment is performed with different rotation speed of the spindle. And the effect of the unbalanced aerostatic spindle on the surface generation is discussed in time and frequency domain. The conclusion shows that the similar cyclical surface ripple of the workpiece is independent of the spindle speed, and the rotation speed of the spindle and unbalanced spindle directly affects the machining surface topography. This study is quite meaningful for deeply understanding the influence rule of spindle unbalanced error from the viewpoint of machined surface and vibration frequency.

Influencing Factors of Surface Generation in Ultra-Precision Fly Cutting

2016 ◽  
Vol 1136 ◽  
pp. 221-226
Author(s):  
Lan Zhan ◽  
Fei Hu Zhang ◽  
Chen Hui An ◽  
Zhi Peng Li
Keyword(s):  
Surface Topography ◽  
Influencing Factors ◽  
Surface Profile ◽  
Surface Generation ◽  
Cutting Machine ◽  
Fly Cutting ◽  
3D Surface ◽  
Ultra Precision ◽  
Topography Model ◽  
Great Focus

Ultra-precision fly cutting machines have long been the hardest one to compliant and induce great focus of researchers. In this paper, a surface topography model is proposed to predict the surface generation in an ultra-precision fly cutting machine. The building of surface topography model is based on the trace of the tool tip. With the 3D surface profile simulations of workpieces, several influencing factors of surface topography, especially the factors related to micro waviness error, are studied.

scholarly journals An Investigation of the Cutting Strategy for the Machining of Polar Microstructures Used in Ultra-Precision Machining Optical Precision Measurement

Micromachines ◽  
2021 ◽  
Vol 12 (7) ◽  
pp. 755
Author(s):  
Chen-Yang Zhao ◽  
Chi-Fai Cheung ◽  
Wen-Peng Fu
Keyword(s):  
Precision Measurement ◽  
Detection Algorithm ◽  
Surface Generation ◽  
Precision Machining ◽  
Tool Geometry ◽  
Depth Of Cut ◽  
Machining Parameters ◽  
Ultra Precision ◽  
Transition Points ◽  
Cutting Strategy

In this paper, an investigation of cutting strategy is presented for the optimization of machining parameters in the ultra-precision machining of polar microstructures, which are used for optical precision measurement. The critical machining parameters affecting the surface generation and surface quality in the machining of polar microstructures are studied. Hence, the critical ranges of machining parameters have been determined through a series of cutting simulations, as well as cutting experiments. First of all, the influence of field of view (FOV) is investigated. After that, theoretical modeling of polar microstructures is built to generate the simulated surface topography of polar microstructures. A feature point detection algorithm is built for image processing of polar microstructures. Hence, an experimental investigation of the influence of cutting tool geometry, depth of cut, and groove spacing of polar microstructures was conducted. There are transition points from which the patterns of surface generation of polar microstructures vary with the machining parameters. The optimization of machining parameters and determination of the optimized cutting strategy are undertaken in the ultra-precision machining of polar microstructures.

Case study of surface micro-waves in ultra-precision raster fly cutting

2016 ◽  
Vol 46 ◽  
pp. 393-398 ◽  
Author(s):  
Guoqing Zhang ◽  
Suet To ◽  
Shaojian Zhang ◽  
Zhiwei Zhu
Keyword(s):  
Fly Cutting ◽  
Ultra Precision

Ultrapräzise Hochgeschwindigkeitsbearbeitung*/Ultra-precision high performance cutting - Part 1: Increasing the surface generation rate using tools with multiple cutting edges and high-speed spindels

2015 ◽  
Vol 105 (06) ◽  
pp. 366-370
Author(s):  
L. Schönemann ◽  
W. Preuß ◽  
O. Riemer ◽  
E. Foremny ◽  
E. Brinksmeier ◽  
...  
Keyword(s):  
High Speed ◽  
High Performance ◽  
Generation Rate ◽  
Surface Generation ◽  
Ultraprecision Machining ◽  
Single Edge ◽  
Ultra Precision ◽  
Optical Freeform Surfaces ◽  
Novel Approaches ◽  
Milling Tools

Die ultrapräzise Fräsbearbeitung ist eine flexible Möglichkeit zur Herstellung optischer Freiformflächen. Aufgrund der hohen Genauigkeitsanforderungen kommen hierbei jedoch zumeist einschneidige Werkzeuge und niedrige Spindeldrehzahlen zum Einsatz. Diese Arbeit zeigt zwei neue Ansätze zur Steigerung der Flächenleistung in der Ultrapräzisionsbearbeitung: den Einsatz thermisch verstellbarer Mehrfachwerkzeuge sowie die Verwendung ultrapräziser Hochgeschwindigkeitsspindeln in Verbindung mit neuen Methoden zur Auswuchtung.   Ultraprecision milling is a flexible process for generating optical freeform surfaces. Due to the tight tolerances of such parts, only single-edge tools and low spindle frequencies are applied. This publication presents two novel approaches to increase the surface generation rate in ultraprecision machining: the use of milling tools with multiple cutting edges that are aligned via a thermomechanical actuator and the application of high speed spindels that require novel approaches for balancing.

Size Effect of CeO2 Particle On Nanoscale Single-Asperity Sliding Friction

2021 ◽  
Author(s):  
Ning Xu ◽  
Jiahui Ma ◽  
Qi Liu ◽  
Weizhong Han ◽  
Zhiwei Shan
Keyword(s):  
Mechanical Properties ◽  
Size Effect ◽  
Sliding Friction ◽  
Abrasive Particle ◽  
Friction Behavior ◽  
Single Asperity ◽  
Ultra Precision ◽  
Ceo2 Particle ◽  
Cutting Regimes ◽  
Tip Radius

Abstract The size of abrasive particle has a great impact on the fundamental friction behavior and mechanical properties of the abrasive during ultra-precision polishing performance. Here, the size effect of the tribological behavior and mechanical properties of CeO2 single abrasive were studied. Experimental results show that the size effect plays a role on coefficient of friction (COF) of each regime in single-asperity sliding friction, especially in ploughing and cutting regimes. The residual depth of the scratch and COF both decrease with the increase of the CeO2 tip radius. These results relate to the mechanical properties of CeO2 nanoparticles. We found that the effective modulus increases with the decrease of abrasive size, which corresponds to the size effect of the single-asperity sliding friction experiment.

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