Influence of the heat deformation of ultra-precision fly cutting tools on KDP crystal surface microstructure

2019 ◽  
Vol 103 (1-4) ◽  
pp. 1009-1018 ◽  
Author(s):  
Pengqiang Fu ◽  
Junqi Xue ◽  
Lijie Zhou ◽  
Yiwen Wang ◽  
Zhikun Lan ◽  
...  
Keyword(s):  
Crystal Surface ◽  
Cutting Tools ◽  
Surface Microstructure ◽  
Kdp Crystal ◽  
Fly Cutting ◽  
Ultra Precision ◽  
Heat Deformation

Experiment Study on the Influencial Factors and Laws of KDP Crystal Surface Quality by Horizontal Fly Cutting

2013 ◽  
Vol 441 ◽  
pp. 53-57
Author(s):  
Jia Liang Guan ◽  
Li Li Zhu ◽  
Sheng Gen Zhu ◽  
Xin Qiang Ma
Keyword(s):  
Surface Quality ◽  
Crystal Surface ◽  
Single Point ◽  
Cutting Parameters ◽  
Rake Angle ◽  
Surface Waviness ◽  
Cutting Depth ◽  
Kdp Crystal ◽  
Fly Cutting ◽  
Similarities And Differences

The influence of tool rake angle, feed rate and back cutting depth on the surface roughness and surface waviness of KDP crystal were studied when processing KDP crystal in the way of horizontal fly cutting. Comparing with the influence laws of vertical single point diamond fly cutting, we analyzed the respective advantages of the two kinds of cutting processing methods and summarized the similarities and differences of the influence rules that cutting parameters on surface quality under the two ways.

Research of an Open CNC System of Machine Tool for Finding and Repairing Surface Damage on KDP Crystal

2014 ◽  
Vol 800-801 ◽  
pp. 531-536
Author(s):  
Ming Jun Chen ◽  
Lin Xi Jiang ◽  
Ze Xuan Zuo ◽  
Yong Xiao
Keyword(s):  
Crystal Surface ◽  
Surface Damage ◽  
Numerical Control ◽  
Cnc System ◽  
Kdp Crystal ◽  
Open Cnc ◽  
System A ◽  
Efficient Detection ◽  
Ultra Precision ◽  
Open Cnc System

In order to find and repair surface damage on KDP crystal, an open computer numerical control(CNC) system has been developed. This paper introduces the hardware structure of the control system, explains the development of an open CNC system software, which has friendly human-machine interface (HMI) and can make the finding and repairing process efficiently and conveniently and also expounds the algorithm and related parameters for servo tuning. With the open CNC system, the process of finding surface damage is accomplished in 3 hours and clear images of crystal surface damage is taken by CCD. And also, with the help of the open CNC system, a 600µm-diameter, 25µm-depth Gaussian repair contour with low roughness is obtained. Experimental results prove that the open CNC system for finding and repairing surface damage on KDP crystal meets the requirement of efficient detection and ultra-precision machining.

scholarly journals Effect of KDP-Crystal Material Properties on Surface Morphology in Ultra-Precision Fly Cutting

Micromachines ◽  
2020 ◽  
Vol 11 (9) ◽  
pp. 802
Author(s):  
Dongju Chen ◽  
Shupei Li ◽  
Jinwei Fan
Keyword(s):  
Surface Morphology ◽  
Material Properties ◽  
Force Model ◽  
Gradient Plasticity ◽  
Cutting Force Model ◽  
Kdp Crystal ◽  
Crystal Material ◽  
Fly Cutting ◽  
Ultra Precision ◽  
Kdp Crystals

To study the effect of material properties on the surface morphology of potassium dihydrogen phosphate (KDP) crystals, an ultra-precision fly cutting machine tool with a single-point diamond tool was used to perform a cutting experiment on (100) crystal plane of the KDP crystal. The elastic modulus, shear modulus, hardness, and dislocation of KDP crystals are taken into the cutting force model by introducing the strain gradient plasticity theory. Since the size effect and dynamic response will affect the surface roughness during ultra-precision machining, the surface roughness of workpieces in ultra-precision fly cutting is hard to predict. Based on the previously established strain gradient plasticity theoretical model, cutting force model, and the dynamic characteristics of the ultra-precision fly cutting system, a surface morphology prediction model under the influence of KDP crystal material properties was established. Finally, the accuracy of the surface morphology prediction model was verified by ultra-precision fly cutting experiments, and identified the frequency range of the characteristic signal caused by the anisotropy of the KDP crystal from the frequency, thereby verifying the KDP crystal material properties has a significant effect on the surface of the machined workpiece roughness.

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

Toward the Understanding of KDP Crystal Surface Height Variation by a Rapid Growth Technique

2018 ◽  
Vol 19 (1) ◽  
pp. 460-469 ◽  
Author(s):  
Kaiwei Hu ◽  
Lili Zheng ◽  
Hui Zhang ◽  
Duanyang Chen ◽  
Hongji Qi
Keyword(s):  
Rapid Growth ◽  
Crystal Surface ◽  
Height Variation ◽  
Kdp Crystal ◽  
Growth Technique

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.

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