14 research outputs found
Test Method of Master Specimen for Calibration of Cylinder Form Measuring Machines = Cilindru virsmas mēriekārtu dinamiskās kalibrēšanas paraugu eksperimentālo pētījumu metode
Procedures for Calculation of 3D Nanometric Surface Texture Parameters
In this article the method and algorithms for three
dimensional digital evaluation of surface nanometric texture is
proposed. Description of machined surfaces is based on the model
containing a certain number of single asperities. For calculation of
texture parameters the array of surface point elevations is used.
Such array of point heights may be obtained by parallel scanning
of surface along a specific number of surface profiles. Any kind of
measuring equipment may be used for scanning.
Mathematical Model of Vibrorolling, based on Linear Programming = Vibroapvelšanas matemātiskais modelis, iegūts ar lineāro programmēšanu
Prediction of 3D Surface Roughness Using Regression Analysis and Fuzzy Logic, and their Comparative Analysis
Nowadays, more and more new quality standards are
developed for manufactured components. One of these quality
standards is the surface roughness, especially the 3D surface
roughness.
In manufacturing of parts, the manufacturer must strictly follow
the assigned surface roughness values. It makes manufacturing
complicated and requires additional control to be imposed on the
components. For this reason, it is necessary to develop a technique
or methodology that facilitates the control of the surface roughness
in production and provides possibility to control the surface
roughness according to the technological parameters.
Prediction of Surface Roughness in End-Milling Using Fuzzy Logic and Its Comparison to Regression Analysis
Mūsdienās augsti automatizētu darbagaldu lietošana ražošanā prasa drošus virsmas raupjuma prognozēšanas modeļus un metodes. Šis pētījums ir veltīts empīrisku virsmas raupjuma prognozēšanas modeļu izveidei gala frēzēšanā, lietojot regresijas analīzes un faziloģikas metodes. Modeļi ietver sekojošus griešanas režīmus: padeve, griešanas ātrums, griešanas dziļums. Empīrisko modeļu izveidē ir lietotas divas konkurējošas datu apstrādes metodes – lineārā regresija un faziloģika. Ar šo modeļu palīdzību prognozētās virsmas raupjuma vērtības ir salīdzinātas ar izmērītajām, lai novērtētu un salīdzinātu modeļus. Kā virsmas raupjuma parametrs ir lietots 3D parametrs Sa 2D parametru vietā. Šī 3D pieeja dod precīzāku virsmas raupjuma veidošanās ainu. Tālākos pētījumos šie modeļi tiks pielietoti CNC adaptīvajā vadībā
PREDICTION OF SURFACE ROUGHNESS IN END-MILLING USING FUZZY LOGIC AND ITS COMPARISON TO REGRESSION ANALYSIS
. This study focuses on developing empirical prediction models using regression analysis and fuzzy logic for surface roughness prediction in end-milling. The model considers the following cutting parameters: feed, cutting speed, depth of cut. Two competing data mining techniques, linear regression analysis and fuzzy logic, are used in developing empirical models. The values of surface roughness predicted by these models are then compared with those from measured – representing procedures for validation and comparison of models. In addition, as surface roughness parameters are used 3D surfaces roughness parameters, especially Sa, instead of 2D roughness parameters. This 3D approach gives more precise look at development of surface roughness in end-milling. Further research could be done in implementing these models in CNC adaptive control mechanisms
Prediction of 3D Surface Roughness Using Regression Analysis and Fuzzy Logic, and their Comparative Analysis
Nowadays, more and more new quality standards
are developed for manufactured components. One of these
quality standards is the surface roughness, especially the 3D
surface roughness.
In manufacturing of parts, the manufacturer must strictly follow
the assigned surface roughness values. It makes manufacturing
complicated and requires additional control to be imposed on the
components. For this reason, it is necessary to develop a
technique or methodology that facilitates the control of the
surface roughness in production and provides possibility to
control the surface roughness according to the technological
parameters
Тенденции развития сварочных технологий
Rakstā tika apskatītas mūsdienu tendences metināšanas tehnoloģiju jomā: gan metināšanā ar kausēšanu, gan metināšanā ar spiedienu
System for Three – Dimensional Surface Roughness Testing
System for three – dimensional surface roughness testin