National Repository of Grey Literature 43 records found  beginprevious40 - 43  jump to record: Search took 0.01 seconds. 
Testing of Nozzles
Foldyna, Josef ; Sitek, Libor ; Ščučka, Jiří ; Klich, Jiří ; Hlaváček, Petr
Based on the request made by the company NET Ltd. Staré Město pod Sněžníkem, tests of quality of nozzles for generation of high-speed water jet were performed at the Department of material disintegration of the Institute of Geonics AS CR, v. v. i., in Ostrava. Three nozzles provided by NET were tested. The nozzles were marked as nozzle CKM – A, nozzle CKM – B, and nozzle ACMK. The nozzle quality was evaluated by the determination of their discharge coefficient at various operating pressures and by visual inspection of the quality of the nozzle and the water jet.
New method for the evaluation of the materials machinability for hydroabrasive machining
Hlaváček, Petr
V příspěvku je popsána nově navržená metodika pro hodnocení obrobitelnosti materiálů při hydroabrazivním obrábění. Tato metodika je založena na porovnání jednotkového objemového úběru materiálů, který vyjadřuje míru jeho obrobitelnosti. Takto stanovená obrobitelnost je konfrontována z fyzikálně mechanickými vlastnostmi obráběných materiálů. Obrobitelnost materiálů je velmi důležitá z hlediska optimalizace technologických parametrů procesu hydroabrazivního dělení, což má vliv na kvalitu, výkon a ekonomiku celého procesu.
Methods of measurement and analysis of surface topography created by hydroabrasive waterjet
Valíček, Jan ; Hlaváček, Petr ; Klich, Jiří ; Hloch, S.
The paper deals with measurement of surfaces created by abrasive waterjet by contact and non-contact methods. Based on performed analysis and interpretation of obtained data from the surface topography created by abrasive waterjet, the methodology for assessing the surface quality is proposed. Subsequently, the main geometrical parameters of surface irregularities and their relationship with topographic feature are defined.
The Kadan Urban Book as a Source for the History of Late Gothic Art
Hlaváček, Petr
Based on testaments of Kadan burghers from the years 1456-1522, the study follows the development of sacral architecture and graphic and plastic arts. The activity of donators is viewed as an expression of late medieval religious feelings.

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8 Hlaváček, Pavel
18 Hlaváček, Petr
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