Influence of the Stator Winding Vibration on the Insulation System Lifetime

The article deals with establishing of natural frequencies at the stator endwinding in stage of design of the machine (generator) and then measurement of the mode shapes (modal analysis on a real machine)

AN AUTOMATIC MEASUREMENT SYSTEM WITH SPREADING RESISTANCE AND PCIV PROFILING FOR CHARACTERIZATION OF SEMICONDUCTORS

This article deals with the design and a control program of an automatic measuring system (AMS). The AMS allows to obtain the carrier concentration profile n(x) from the spreading resistance (SRP, with single point probe) and point contact current voltage (PCIV) measurements on a bevelled structure. The software of the AMS contains the possibility of calibration needed for converting the measured data into a carrier concentration profile and graphical subroutines for conversion of the resistivity to concentration. The software of the AMS further permits monitoring of running measurements by SRP and PCIV by LAN networks. The attained results in designing and creating the control program were verified by measuring and determining the carrier concentration profile on selected structures. The experimental n(x) profile has been compared with that calculated by program SUPREM

Development of Web Application in Nonbanking Sector

The bachelor thesis focuses on the design and development of a web application for VistaCredit, s.r.o., which offers financial services in non-banking sector. The design and development process is based on the requirements set by the company and on the data obtained from the performed analyzes of the current state. The front-end of the web application is implemented using React.js and TypeScript libraries and using the Bootstrap css framework. The web application fully communicates with the REST API created by company

Development of Web Application in Nonbanking Sector

Bakalárska práca sa zameriava na návrh a vývoj webovej aplikácie pre spoločnosť VistaCredit, s.r.o., ktorá ponúka finančné služby v nebankovom sektore. Proces návrhu a vývoja vychádza z požiadaviek stanovených spoločnosťou a z dát získaných z vykonaných analýz súčasného stavu. Front-end webovej aplikácie je implementovaný pomocou knižníc React.js a TypeScript s využitím css frameworku Bootstrap. Webová aplikácia plne komunikuje s REST API, ktoré spoločnosť vytvorila.The bachelor thesis focuses on the design and development of a web application for VistaCredit, s.r.o., which offers financial services in non-banking sector. The design and development process is based on the requirements set by the company and on the data obtained from the performed analyzes of the current state. The front-end of the web application is implemented using React.js and TypeScript libraries and using the Bootstrap css framework. The web application fully communicates with the REST API created by company.

The Precision Analysis of Cutting Edge Preparation on CBN Cutting Inserts Using Rotary Ultrasonic Machining

This paper is focused on the issue of preparing the cutting edge microgeometry of cutting inserts made of cubic boron nitride (CBN). The aim of this research was to investigate the possibilities of rotary ultrasonic machining (RUM) for preparing asymmetric cutting edge microgeometries of various shapes (chamfers, circular, and elliptical rounding and their combinations) on a CBN cutting tool. In this article, a new type of advanced cutting edge preparation method is presented. CBN is relatively resistant to the most often used (abrasive) methods of cutting-edge preparation, due to its very high hardness (which is a prerequisite property for machining difficult-to-cut materials). Such hard materials could be processed using advanced manufacturing methods, and rotary ultrasonic machining (RUM) is one such method. Experiments have shown that RUM can be used for machining CBN. However, high hardness is not the only challenge here. For cutting edge preparation, it is necessary to achieve an adequate accuracy of size and dimensions. The presented paper analyzes the suitability of the RUM process for processing CBN inserts. The results of the experiment showed that this method can be used for preparing asymmetric cutting edge microgeometries with various shapes

Aditive manufacturing of M300 steel cutting tools by selective laser melting

The article presents preliminary research on the application of additive manufacturing in the production of monolithic cutting tools for various machining operations as a new way of producing cutting tools with innovative potential. The necessary steps to produce functional cutting tools via Selective Laser Melting have been investigated. Two sets if samples were printed via SLM machine ReniShaw AM 400 from maraging steel M300 in collaboration with VSB-TU Ostrava. First set of samples were semi-finished rods and second set were cutting tools with printed geometry. Machine operations such as turning and grinding were used to achieve functionality of cutting tools so that can be used in the machining process. Experimental part of article is focused on investigating of machining capabilities of printed cutting tools.Web of Science20236740673