Mašīnu detaļu virsmu mikroģeometrijas telpisko parametru tehnoloģiskais nodrošinājums

Promocijas darbā „Mašīnu detaļu virsmu mikroģeometrijas telpisko parametru tehnoloģiskais nodrošinājums” izstrādāta metodika virsmas raupjuma prognozēšanai atkarībā no tehnoloģiskiem parametriem, kā arī izveidots apstrādes adaptīvās vadības koncepts. Apskatīts zināmais tehnikas līmenis virsmas raupjuma prognozēšanai atkarībā no tehnoloģiskiem parametriem. Papildus tam, 2D virsmas raupjuma parametru vietā tiek ieviesti 3D virsmas raupjuma parametri. Analizētas 3D virsmas raupjuma parametru priekšrocības pār 2D virsmas raupjuma parametriem. Eksperimentāli izstrādāti 3D virsmas raupjuma prognozēšanas modeļi frēzēšanā un virpošanā, izmantojot gan regresijas analīzi, gan faziloģiku. Pētīta faziloģikas iespējamība to izmantot tehnoloģiskā nodrošinājuma risinājumos. Izvērtēta regresijas un faziloģikas prognozēšanas modeļu precizitāte, iekļaujot salīdzinošo analīzi. Izveidots virsmas apstrādes adaptīvās vadības koncepts, izmantojot faziloģiku

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

Ball Burnishing as Finish Method of Compressor Shaft Wear Sleeve

Nowadays more and more advanced technologies in surface finish are developed. The ball burnishing technology of wear sleeve gives smoothened surface characteristics, which im-proves initial abrasive wear resistance, bearing rate, and residual compressive stresses in the surface layer of the wear sleeve. These parameters may significantly increase the life cycle of PTFE seal-ing knot. This paper recognizes the technology advances in wear sleeve manufacturing and gives directions for further research and discussion

Design of Internally Cooled Tools for Dry Cutting

In modern manufacturing more and more metal cutting is performed using so called dry cutting technique (no coolant). The process is used where cutting with coolant is not desired. Said dry cutting due to the non-use of coolants is also environmental friendly, which is important feature in today green manufacturing agenda. The paper gives an overview on the state-of-art internally cooled cutting tools. It also represents possible new designs of internally cooled tools for turning concentrating on today’s manufacturing needs. Novel solutions and concepts are introduced. Proposed concepts will give the guidelines for further research and development to be carried on

Design of Internally Cooled Tools for Turning

Nowadays more and more emphasis is put on the development of environmentally friendly technologies. It is well known that the use of cutting fluid or cooling liquid poses risks to environment and health. It can also increase the cost of manufacturing. This paper presents the latest developments in smart cutting tools having internal cooling. This paper unites the main researches that have been done in the field of internally cooled tools. Many proposed solutions are still at the conceptual level. This paper recognizes the concepts of internally cooled tools and gives directions for further research and discussions.

Design of Internally Cooled Tools for Turning

Nowadays more and more emphasis is put on the development of environmentally friendly technologies. It is well known that the use of cutting fluid or cooling liquid poses risks to environment and health. It can also increase the cost of manufacturing. This paper presents the latest developments in smart cutting tools having internal cooling. This paper unites the main researches that have been done in the field of internally cooled tools. Many proposed solutions are still at the conceptual level. This paper recognizes the concepts of internally cooled tools and gives directions for further research and discussions