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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Návrh suportu brusky / Design of slide Grinder

Kudláček, Miroslav January 2012 (has links)
The goal of my thesis is to design a support for a CNC horizontal surface grinder, using the working area of grinding wheel circumference. The proposal is based on the client’s requirements for several variants of the propulsion drive and guide systems.
2

Návrh a analýza křížového stolu / Design and analysis of the cross table

Zemčík, Matěj January 2018 (has links)
This thesis deals with the design of the cross table. That is, designing a linear guide, a ball screw and a motor. In addition, dynamic simulations are used in the MSC Adams for machining cycle and the positioning cycle of the semi-product at rapid traverse. As a simulation output are the „real“ load patterns of the bearings in the placing of the ball screws and the durability of these bearings.
3

Návrh vřeteníku pro obráběcí centrum / Design of a headstock for a machine tool

Sehon, Tomáš January 2019 (has links)
This master’s thesis deals with design of a headstock for a machine tool. Theoretic part of this thesis provides basic description of a horizontal machine tool. Further it is dedicated to description of a headstock of machines with extensionable work spindle. In a design part firstly optimal variant is chosen by using multicriterial analysis. Necessary calculations were done and chosen variant was developed. Design is realised by 3D CAD model and drawing documentantion.
4

Elektronika pro vyšívací stroj / Electronics for Sewing Machine

Karásek, Josef January 2014 (has links)
The main components of the system for embroidery sewing machine is (Veritas 8014/35-2) and pointing devices. The machine automatically entered embroidered patterns, it is necessary to construct a pointing device and its control. To drive the pointing device used two stepper motors, the control circuit to cater to the ATmega128. Communication between PC and ATmega128 provides converter FT232.
5

Konstrukce konzoly s polohovacím stolem pro konzolovou frézku / Design of a console with adjustable worktable for a console milling machine

Betlach, Jakub January 2014 (has links)
This diploma thesis includes research in the structural parts of milling machines and designs of a console adjustable. This diploma thesis includes necessary calculations, adjustable worktable assembly drawing, selected drawing documentation, 3D model and model in an immersive virtual reality.
6

Energetický model lineární osy s kuličkovým šroubem a servopohonem / Energetic model of linear axis with ball screw and servodrive

Sládek, Vojtěch January 2019 (has links)
The aim of the thesis was to study the Energy Models of Linear Axes with Ball Screws and Servo Drives, to analyze the individual parts of the axis with respect to losses, the methodology of calculating the losses on the electrical part and the mechanical part of the drive and creating a complex algorithm that calculates the energy consumed for the specified motion. The thesis is divided into a theoretical and practical part, where the theoretical part is divided into the treatise on the electrical part of the axis and its losses and the part that deals with the mechanical part and its losses. The calculation is divided into the basic verification algorithm and the calculation on the given example. Each calculation is calculated for both linear acceleration and S-curve acceleration. For both types of acceleration, the result of energy and its course over time is also the waveforms of position, velocity, acceleration, angular acceleration, moments, powers, power, speed and currents over time.
7

Powertrain components for a novelwave energy converter / Transmissionsdelar för en ny typ av vågkraftverk

HENRIKSSON, JOHAN January 2014 (has links)
Since mankind found out that she is the reason to the recent global warming shehas, in some societies, begun a conversion of her society, from driven by fossil fuel tosustainable fuel. One of these is so called wave energy.CorPower Ocean's wave energy converter consist of a buoy, which through a wire,is connected to a shaft in the plant. This shaft drives two gas lled and pressurisedpistons, which stores the energy from the buoy's upward motion and returns it at thebuoy downward motion, aiming at evening the energy production over the cycle. Inthe wave energy converter there are several seals, between hydraulic uids, betweenhydraulic uids and the gas pistons as well as between the plant and the surroundingocean where the shaft exits the plant.To select the right kind of seals the range in the working temperature of the surroundinguids need to be known, as do the load of the waves on the shaft. This inorder to select seals of the right material and to construct a linear guide.The purpose of this thesis is to acquire the initial demands for the seal and linearguide. In other words make a thermal analysis of the surrounding environmentin order to select seals and an initial load analysis in order to construct a robustlinear guide.The result is that in order to control the temperature, a reservoir volume shouldbe added to the cylinders and a change in this volume gives the most eect on thetemperature and compression rate. Regarding the linear guides, slide rings on bothsides of the two outer seals should be enough. This thesis should be viewed as aninitial analysis of the sealing problem to be able to outline the demands on the sealsand linear guides related to the gas compartments. / Sedan manninskan ck reda pa att hon ar orsaken till den senaste tidens globalauppvarming har hon, i nagra samhallen, paborjat en omstallning av sitt samhalle,fran fossila branslen som drivmedel till langsiktigt hallbara drivmedel. Ett av dessaar sa kallad vagkraft.CorPower Oceans vagkraftverk bestar av en boj, som genom en vajer faster i endragstang i sjalva kraftverket. Denna dragstang driver tva gasfyllda och trycksattakolvar, som lagrar energin fran bojens uppgaende rorelse och aterger den vid bojensnedgande rorelse, med malet att dessa jamnar ut kraftproduktionen over cykeln. Iverket nns era tatningar, mellan olika hydraulvatskor, mellan hydraulvatskor ochgaskamrarna samt mellan verket och det omgivande havet dar dragstangen gar ut urverket.For att kunna valja ratt tatningar maste spannet i arbetstemperatur pa de omgivandeuiderna, samt lasten fran vagorna pa dragstangen, vara kanda. Detta foratt tatningar av ratt material ska kunna valjas och en linjarguide konstrueras.Detta arbete syftar till att ta fram de initiella kraven pa tating och linjarguide.Med andra ord gora en termisk analys av den omgivande miljon for att kunnavalja tatningar samt en inledande kraftanalys for att kunna konstruera en robustlinjarguide.Slutsatsen blir att for att styra temperaturen, bor en reservoirvolym laggas till cylindrarnaoch en andring av volymen pa denna ger storst eekt pa gasens temperaturoch kompressionsgrad. For linjarguidens del bor det ga bra med glidringar pa badasidor om de yttersta tatningarna. Det exakta valet av tatingslosning kommer Cor-Power Ocean dock att arbeta fram med ett lampligt foretag. Denna uppsats ska sessom en inledande analys av tatningsproblemet for att kunna ange huvuddragen avkraven pa tatningar och linjarguider relaterade till gascylindrarna
8

Konstrukční návrh lineární osy pro těžký obráběcí stroj / Design of linear axis for heavy machine tool

Kubálek, Petr January 2020 (has links)
This diploma thesis deals with the design of the linear axis of a heavy machine tool. It describes the basic specifications of these machines, their manufacturers, the parts of which the axis consists and the design itself. The design includes several design variants, calculation of the movement mechanism, drive and linear guide. Follows the selection of the most suitable variant and the drawing documentation of the resulting linear axis.
9

Návrh malé modelářské CNC frézky s pevným stolem / Design of small hobby CNC milling machine with fixed table

Hanzal, Jiří January 2020 (has links)
The topic of this work is the design of a small model CNC milling machine with a fixed table for machining wood, plastic, or light alloys (Al, Zn, etc.). It also includes a calculation report and drawing documentation of selected nodes. The beginning of this work consists of an introduction to the issue of milling machines, their distribution and subsequent market analysis. Subsequently, the input parameters are designed on the basis of market analysis and in the last part there is a calculation report, the design of the milling machine itself and a short economic evaluation.
10

Konstrukční návrh kamerového jeřábu / Design of camera crane

Navrátil, Pavel January 2011 (has links)
This Master’s thesis deals with several variants construction design of camera crane. Two optimal variants are chosen with regard to practical usage. The thesis includes complete design of these variants with 3D models and strenght analyses. This analyses are processed by final element method. The first variant made based on technical documentation and it has worked for company Filmochod s.r.o..

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