Algorithms to Deconvolve Stylus Geometry From Surface Profile Measurements

1985 ◽  
Vol 107 (2) ◽  
pp. 167-174 ◽  
Author(s):  
W. R. DeVries ◽  
Cheng-Jih Li
Keyword(s):  
Surface Topography ◽  
Surface Profile ◽  
Geometric Algorithms ◽  
True Surface ◽  
True Profile ◽  
Measuring Surface ◽  
Geometric Size

Stylus methods for measuring surface topography impose certain limits on resolving the true profile of a surface. These limits are primarily due to the finite geometric size of the stylus. In this paper, kinematic and geometric algorithms are developed to compensate for stylus geometry so as to present a better picture of the true surface profile. To demonstrate their effectiveness, these algorithms are applied to simulated deterministic and stochastic profile measurements.

CONSISTENCY ANALYSIS OF WORN SURFACE TOPOGRAPHY AND FRICTION FORCE BASED ON PHASE TRAJECTORY AND RECURRENCE ANALYSIS

Fractals ◽  
2019 ◽  
Vol 27 (08) ◽  
pp. 1950130
Author(s):  
XUE ZUO ◽  
MINGLONG PENG ◽  
YUANKAI ZHOU
Keyword(s):  
Fractal Dimension ◽  
Surface Topography ◽  
Friction Force ◽  
Phase Trajectory ◽  
Small Volume ◽  
Surface Profile ◽  
Recurrence Plots ◽  
Recurrence Analysis ◽  
Wear Process ◽  
Worn Surface

The dynamic evolutions of friction force and worn surface profile were qualitatively analyzed by phase trajectory and recurrence plots and quantitatively characterized by fractal dimension and percent determinism. The results show that phase trajectories first shrink to a small volume, then stabilize at a minimum volume, finally expand to a large volume in the wear process. The white areas on the recurrence plots increase with the wear time. The fractal dimension first increases, then stabilizes at a high value, and finally decreases rapidly. The percent determinism first decreases, then fluctuates in a certain range, and finally increases. It demonstrates that friction force and worn surface topography derived from one tribology system evolve in a similar but not exactly the same way. They have the consistent evolution law in the wear process. Specially, friction force is much more sensitive to the variation of wear states than the worn surface.

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.

Analysis of Surface Topography Characteristics in Electrochemical Mechanical Finishing

2010 ◽  
Vol 126-128 ◽  
pp. 658-663 ◽  
Author(s):  
Ze Fei Wei ◽  
Wen Ji Xu ◽  
Gui Bing Pang ◽  
Xu Yue Wang
Keyword(s):  
Surface Topography ◽  
Low Frequency ◽  
Surface Profile ◽  
Frequency Component ◽  
Original Surface ◽  
Auto Correlation ◽  
Before And After ◽  
Auto Correlation Function ◽  
The Mean ◽  
Quality Material

In this paper, surface topography characteristics of electrochemical mechanical finishing (ECMF) for steel was investigated. The scanning electron microscopy (SEM) was used to observe the surface topography. And the microcosmic geometry parameters were measured by Talysurf SLI2000. Compared with original surface, the surface topography characteristics of the workpiece machined by ECMF have been analyzed with altitude density function (ADF) and auto correlation function (ACF). The results show that there exist periodicity component in surface profile before and after finishing. The auto correlation curves of ECMF surface have a smaller average period compared with grinding surface. The low-frequency component and the mean ripple peak distance of original surface profile are obviously decreased. Furthermore, the ripples and peak density are increased, and the surface roughness Ra is decreased from 0.231μm to 0.023μm. The results indicate that surface quality, material ratio of the profile and wear resistance machined by ECMF are improved obviously.

Investigation of Surface Topography at the End of Running-In Process

2013 ◽  
Vol 437 ◽  
pp. 564-567
Author(s):  
Geng Pei Zhang ◽  
Xiao Jun Liu ◽  
Wen Long Lu ◽  
Xiang Qian Jiang
Keyword(s):  
Surface Roughness ◽  
Surface Topography ◽  
Surface Profile ◽  
Wear Process ◽  
Equilibrium Surface ◽  
Important Stage ◽  
Before And After ◽  
3D Information

Running-in process is an important stage of whole wear process. The irrelevance of surface roughness before and after running-in puzzled the running-in research. However, this conclusion was based on surface roughness derived from the 2D surface profile which does not contain 3D information, and was therefore not complete. In this paper, running-in experiments were conducted to investigate the issue. The results showed that there is no equilibrium surface topography similar with equilibrium roughness at the end of running-in process.

Analysis of Effective Cutting-Edge Distribution of Grinding Wheel Based on Topography of Working and Ground Surfaces

2011 ◽  
Vol 325 ◽  
pp. 60-65
Author(s):  
Haruhisa Sakamoto ◽  
Kyoko Nakamura ◽  
Yoshinori Sasaki ◽  
Shinji Shimizu
Keyword(s):  
Surface Topography ◽  
Grain Shape ◽  
Pure Copper ◽  
Surface Profile ◽  
Ground Surface ◽  
Cutting Edge ◽  
Grinding Wheel ◽  
Noise Component ◽  
Working Surface ◽  
Ground Surface Roughness

In this study, the determination method of the number of the effective cutting-edges had been proposed based on the measurements of working surface topography and the grinding force. Furthermore, its validity is made clear based on the topographical analysis of the ground surface roughness of pure copper, which is excellent in transcribing the working surface. From the results, the following are found out: The ground surface topography contains the periodical component, which is originated in the grinding and dressing conditions, on the fractal noise component. The cutting traces by each cutting-edge can be countable from the ground surface profile, and then, the number of the effective cutting-edges is identified at one line within the working surface. On the other hand, the number of the effective cutting-edges also can be identified based on the working surface, but, this method requires the determination of the typical grain shape. From the experiment, it is confirmed that the grain shape should be almost spherical for making the numbers of the effective cutting-edge identified from the working and ground surfaces equal.

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