Construction of equipment for deburring gears

Tato práce se zabývá konstrukcí přípravku k odjehlování ozubených kol ve stroji Gleason GP 200. V první části práce je zpracována rešerše o současných metodách odjehlování. Následuje rozbor úlohy, kde jsou analyzovány rozměry a dispoziční řešení stroje se zaměřením na umístění přípravku. Dále je provedena volba vhodného nástroje. Jsou nastíněny dvě varianty konstrukčního řešení. Jedna z nich je dále rozpracována. Jsou vyřešeny důležité konstrukční uzly přípravku. Na konci práce je provedena analýza geometrie a tuhosti přípravku. S přihlédnutím k maximální deformaci je doporučeno maximální zatížení přípravku.This thesis deals with the design of the equipment for deburring gears on the Gleason GP 200 machine. The first part contains research of current methods of deburring. At the following analysis of the task dimensions and layout of the machine, focusing on equipment placement, are analyzed. Next, a choice of tool is made. Two variants of design solutions are outlined. One of them is more elaborated. Important structural units are solved. At the end of the thesis an analysis of the geometry and stiffness is made. The maximum equipment load is recommended with regard to the maximum deformation.

Biomass Production on Reclaimed Areas Tailing Ponds

This chapter presents the results of a multiannual systematic research and development of essentially new environmental safety technology of overlapping tailing pond modelled in terms of Vojany thermal power plant (EVO), Slovakia. Re‐cultivated tailing area can be used to produce biomass (Swedish willow) and this biomass is used again for subsequent incineration with coal. Laboratory and small plot experiments conducted directly in the tailing pond area resulted in the development of another new dimension of environmental technology of decontamination of tailing ponds. This technology connects technical, safety, economical and environmental effects for biomass production

Mechanical design of mobile camera system via electric drive

Tato bakalářská práce je se zabývá přehledem kamerové techniky pro pohyb kamery a samotnou konstrukcí kamerového jeřábu s elektrickým pohonem kamerové hlavy. V konstrukční části práce jsou nejprve uvedeny návrhy koncepce kamerového jeřábu obsahující i pevnostní výpočty v jednotlivých místech, dále samotný návrh podle zvolené koncepce. Jsou zobrazeny řešení jednotlivých částí jeřábu s jejich popisem a pohledy. V závěru jsou shrnuty výhody tohoto řešení a je uveden ekonomický rozbor zahrnující ceny jednotlivých komponent i celého jeřábuThis bachelor thesis deals with an overview of accessories for a camera movement and mechanical design of a mobile camera crane via electric drive. In the construction part of the thesis are primarily brought conception designs of a camera crane including stress analysis in each places of the crane and then the proposal itself according to the chosen concept. There are shown solutions of individual parts of the camera crane with their description and views. In the end of the thesis are resumed the advantages of the design and economical analysis including the prices of each components and the whole crane.

A unilateral boundary-value problem for the rod

summary:A unilateral boundary-value condition at the left end of a simply supported rod is considered. Variational and (equivalent) classical formulations are introduced and all solutions to the classical problem are calculated in an explicit form. Formulas for the energies corresponding to the solutions are also given. The problem is solved and energies of the solutions are compared in the pertubed as well as the unperturbed cases

Palygorskite in caves and karsts: a review

Palygorskite is fibrous mineral representing the transitional phase between chain silicates and layer silicates with modulated phyllosilicate structure. Although often found in carbonate environments, it forms quite uncommon constituent of cave fills. Palygorskite occurs in cave fills in two forms: (1) allogenic palygorskite which in arid and semiarid conditions can represents substantial constituent of cave fills, often associated with smectite, gypsum, calcite and halite; it is airborne or transported by surface run-off to caves from desert soils and paleosoils, calcretes, dolocretes and related deposits in cave surroundings. (2) Authigenic palygorskite occurs as in situ precipitate in cave fills from percolating water solutions and/or transformation of smectite and kaolinite in dry evaporative conditions and suitable geochemical composition of solutions. In carbonate host-rocks palygorskite fills fissures and faults and often it is found in cave walls. It occurs commonly as part of the “mountain leather” as a result of hydrothermal and/or weathering processes or represents a product of in situ chemical precipitation from percolating meteoric solutions with suitable pH a redox conditions and chemical composition.Key words: palygorskite, caves, karst.Paligorskit v jamah in krasu: pregledPaligorskit je vlaknat mineral, ki je prehodna fazo med inosilikati in listastimi silikati z modulirano strukturo filosilikata. Čeprav je pogost v karbonatnih okoljih, je precej neobičajna sestavina jamskih sedimentov. Paligorskit se v jamah pojavlja v dveh oblikah: (1) kot alogeni paligorskit, ki je v sušnih in polsuhih razmerah lahko znaten sestavni del jamskih sedimentov, pogosto povezanih z montmorillonitom, sadro, kalcitom in halitom; v teh primerih gre za eolski nanos ali pa za transport v jame s površinskim transportom iz puščavskih tal in paleotal, kalkret, dolokret in podobnih sedimentov; (2) kot avtogeni paligorskit se pojavlja v jamah kot »in situ« oborina iz prenikajočih raztopin in/ali z obarjanjem med transformacijo montmorillonita in kaolinita v jamskih sedimentih v suhih razmerah izhlapevanja in primerno geokemično sestavo raztopin. V karbonatnih kamninah paligorskit zapolnjujejo razpoke in prelome in ga pogosto najdemo na jamskih stenah. Običajno se pojavlja kot del “gorskega usnja”, ki je posledica hidrotermalnih in/ali procesov preperevanja. Lahko pa nastane tudi zaradi in situ kemičnega obarjanja iz prenikajočih meteornih raztopin z ustreznim pH, redoks potencialom in kemično sestavo.Ključne besede: paligorskit, jame, kras