Evaluation of high-frequency roughness measurement errors for composite and ceramic surfaces after machining

Journal of Manufacturing Processes, Journal Year: 2024, Volume and Issue: 121, P. 150 - 171

Published: May 20, 2024

Precise characterisation of surface topography is the greatest importance since many factors directly affect accuracy whole measurement process. In this paper, variety topographies from machined composite and ceramic workpieces was studied with a special emphasis on results. Surfaces were subjected to ground diamond, honing milling processes. Measurement results analysed in terms application procedure for removal high-frequency noise. Bandwidth characteristics supported by studies autocorrelation power spectral functions. It found, that examination noisy data, especially its isotropic properties, crucial enhancement noise-removal methods. The proposed validated through direction profile characterisation. spline filtering technique 7.5 μm cut-off encouraged against other generally used techniques reduction noise considering study based spectral, methodology comparing it averaged 3 time repeated measurements surfaces after machining. main advantage proposal reducing data processing due fast easy-to-implement usage general analysis functions, available commercial software measuring instrument.

Language: Английский

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Reduction in Errors in Roughness Evaluation with an Accurate Definition of the S-L Surface

Materials, Journal Year: 2023, Volume and Issue: 16(5), P. 1865 - 1865

Published: Feb. 24, 2023

Characterization of surface topography, roughly divided into measurement and data analysis, can be valuable in the process validation tribological performance machined parts. Surface especially roughness, respond straightly to machining and, some cases, is defined as a fingerprint manufacturing. When considering high precision topography studies, definition both S-surface L-surface drive many errors that influence analysis accuracy manufacturing process. Even if precise measuring equipment (device method) provided but received are processed erroneously, still lost. From matter, S-L roughness evaluation allowing reduction rejection properly made In this paper, it was proposed how select an appropriate procedure for removal L- S- components from raw measured data. Various types topographies were considered, e.g., plateau-honed (some with burnished oil pockets), turned, milled, ground, laser-textured, ceramic, composite, generally, isotropic. They different (stylus optical) methods, respectively, parameters ISO 25178 standard also taken consideration. It found commonly used available commercial software methods helpful surface; its usage requires response (knowledge) users.

Language: Английский

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Roughness evaluation of turned composite surfaces by analysis of the shape of autocorrelation function

Measurement, Journal Year: 2023, Volume and Issue: 222, P. 113640 - 113640

Published: Sept. 30, 2023

In this paper, the application of an Autocorrelation Function for characterisation surface topography was validated. The roughness evaluation turned composite surfaces supported by sophisticated studies properties, considering especially shape function. Details were measured with optical method. selection procedures carried out based on both profile and areal analyses. Moreover, various types regular analysis methods, proposed in commercial software, like Gaussian regression robust functions, median de-noising, isotropic Spline, fast Fourier transform filters, parameters from ISO 25178 standards. It found that many common techniques, commonly used spectral analysis, texture direction, studies. hard thresholding technique to be valuable comprehensive noise-suppression analysis.

Language: Английский

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Evaluation of High-Frequency Measurement Errors from Turned Surface Topography Data Using Machine Learning Methods

Materials, Journal Year: 2024, Volume and Issue: 17(7), P. 1456 - 1456

Published: March 22, 2024

Manufacturing processes in industry applications are often controlled by the evaluation of surface topography. Topography, its overall performance, includes form, waviness, and roughness. Methods measurement roughness can be roughly divided into tactile contactless techniques. The latter ones much faster but sensitive to external disturbances from environment. One type source error, while topography occurs, is a high-frequency noise. This noise originates vibration measuring system. In this study, methods for reducing errors results measurements turned surfaces were supported machine learning methods. research delves optimizing filtration through application models, focusing on enhancing accuracy assessments. By examining under specific machining conditions employing variety digital filters, study identifies Gaussian regression filter spline as most effective at 22.5 µm cut-off. Utilizing neural networks, support vector machines, decision trees, demonstrates superior performance SVMs, achieving remarkable sensitivity predicting optimal

Language: Английский

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The Effect of Non-Measured Points on the Accuracy of the Surface Topography Assessment of Elements 3D Printed Using Selected Additive Technologies

Materials, Journal Year: 2023, Volume and Issue: 16(1), P. 460 - 460

Published: Jan. 3, 2023

The paper presents the results of research aimed at evaluating surface topography including analysis number unmeasured points samples 3D printed using four additive technologies (i.e., PolyJet Matrix, fused deposition modeling, selective laser sintering, and melting). were made in three variants location on printing platform printers. Measurements samples’ carried out a Talysurf CCI Lite optical profilometer PGI 1230 contact profilometer. percentage non-measured for each sample parameters determined. Then, complemented corrected recalculated. In addition, to perform comparative measurements, was measured 1230. Preliminary showed that measurement sintering technology with Taysurf measuring system is very unreliable, as analyzed higher than 98%. highest accuracy obtained PJM printer.

Language: Английский

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Possibilities of a Hybrid Method for a Time-Scale-Frequency Analysis in the Aspect of Identifying Surface Topography Irregularities

Materials, Journal Year: 2023, Volume and Issue: 16(3), P. 1228 - 1228

Published: Jan. 31, 2023

The article presents research results related to assessing the possibilities of applying modern filtration methods diagnosing measurement signals. Fourier transformation does not always provide full information about signal. It is, therefore, appropriate complement methodology with a multiscale method: wavelet transformation. A hybrid combination two algorithms in revealing additional signal components, which are invisible spectrum case using only harmonic analysis. tests performed both simulated signals and measured roundness profiles rollers rolling bearings proved advantages complex approach. transformations resulted possibility identify components signal, directly translates into better diagnostics. fill gap terms diagnostics assessment profiles, is very important from standpoint precision industry.

Language: Английский

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Surface Quality and Material Removal Rate in Fabricating Microtexture on Tungsten Carbide via Femtosecond Laser

Micromachines, Journal Year: 2023, Volume and Issue: 14(6), P. 1143 - 1143

Published: May 28, 2023

Tungsten carbide is currently the most widely used tool material for machining difficult-to-machine materials, such as titanium alloys and nickel-based super alloys. In order to improve performance of tungsten tools, surface microtexturing, a novel technology that can effectively reduce cutting forces temperatures wear resistance, has been applied in metalworking processes. However, when fabricating micro-textures micro-grooves or micro-holes on surfaces, significant decrease removal rate major obstacle. this study, straight-groove-array microtexture was fabricated tools via femtosecond laser with different parameters including power, frequency, scanning speed. The rate, roughness, laser-induced periodic structure were analyzed. It found increase speed decreased whereas increasing power frequency had opposite effects rate. have influence destruction reason reduction results study revealed fundamental mechanisms efficient method fabrication microtextures ultrahard materials an ultrashort laser.

Language: Английский

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Resolving Selected Problems in Surface Topography Analysis by Application of the Autocorrelation Function

Coatings, Journal Year: 2022, Volume and Issue: 13(1), P. 74 - 74

Published: Dec. 31, 2022

In this paper, the validity of application an autocorrelation function for resolving some surface topography measurement problems was presented. Various types surfaces were considered: plateau-honed, honed with burnished dimples, ground, turned, milled, laser-textured, or isotropic. They measured stylus and non-contact (optical) methods. Extraction selected features, such as form waviness (defined L-surface) high-frequency noise (S-surface) from raw data, supported function. It proposed to select analysis procedures both profile (2D) areal (3D) analysis. Moreover, applications various regular (available in commercial software) methods, least-square-fitted polynomial planes, Gaussian (regression robust) functions, median filter, spline approach, fast Fourier transform scheme, evaluation parameters ISO 25178 standards.

Language: Английский

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Tribological Investigation of Textured Surfaces in Starved Lubrication Conditions

Materials, Journal Year: 2022, Volume and Issue: 15(23), P. 8445 - 8445

Published: Nov. 27, 2022

The present work investigates the friction reduction capability of two types micro-textures (grooves and dimples) created on steel surfaces using a vertical milling machine. wear studies were conducted pin-on-disc tribometer, with results indicating better capacity in case dimple texture as compared to grooved texture. microscopic images pin surface revealed deep furrows significant damage groove-textured disc. An optimization textured was performed an artificial neural network (ANN) model, predicting influence function load, depth cut distance between micro-textures.

Language: Английский

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Roughness Evaluation of Burnished Topography with a Precise Definition of the S-L Surface

Applied Sciences, Journal Year: 2022, Volume and Issue: 12(24), P. 12788 - 12788

Published: Dec. 13, 2022

Studies of surface topography including processes measurement and data analysis have an influence on the description machined parts with their tribological performance. Usually, roughness is analysed when a scale-limited (S-L) surface, excluding short (S-) length (L-) components from raw measured data, defined. Errors in precise definition S-L can cause false estimation detail properties, especially its arise contains some burnished details such as oil pockets, dimples, scratches, or, generally, deep or wide features. The validation proposed methods for also affect accuracy ISO 25178 parameter calculation. It was found that application commonly used procedures, available commercial software (e.g., least-square fitted cylinder element polynomial planes, regular robust Gaussian regression, spline, median fast Fourier transform filters) be suitable definition. However, additional analyses, based power spectral densities, autocorrelation function, texture direction graphs, characterisation, are strongly required. effect values parameters comprehensively studied. Some proposals guidance how to define appropriate with, respectively, objective evaluation parameters, were presented.

Language: Английский

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