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Press model included Safety function
Mikyska, Kamil ; Hynčica, Ondřej (referee) ; Štohl, Radek (advisor)
This thesis deal with creation of learning press model included safety function. Hardware implementation and ordering particular components is described. Designed service program is explained. This program is created in development system RS - logix 5000 by ladder diagram language. Panel view is used for better transparent of the process. Service program for this panel is created in development system RS - ViewStudio. Every possibilities of model usage are described.
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Single purpose machine for automotive parts assembly
Trávníček, Ivo ; Hrbáček, Jan (referee) ; Krejsa, Jiří (advisor)
Práce se zabývá návrhem jednoúčelového plně automatického zařízení pro automobilový průmysl, které dávkuje silikonovou směs do pouzdra snímače. V první části práce je řešen návrh mechanické části zařízení, zejména manipulátoru pro polohování dávkovací hlavy. K pohonu manipulátoru je využito pneumatických prvků, které jsou řízeny elektrickými signály. Druhá část práce se zabývá řízením stroje, které je realizováno pomocí PLC systému. Obsluha může ovládat zařízení nebo sledovat aktuální stav na dotykovém panelu. V závěru práce je prezentováno skutečné provedení zařízení a propojení s výrobní linkou.
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Analysis of membrane structures
Motyčka, Tomáš ; Zajac, Zbyněk (referee) ; Lang, Rostislav (advisor)
This thesis focuses on a comprehensive analysis and design of membrane structures that are one of the most dynamically developing areas in structural engineering. These structures, that are characterised by their ability to cover large spans with a minimum number of supporting elements and provide high levels of natural light due to their translucency, are examined in this thesis from theoretical and practical perspectives. In the theoretical part of the thesis, the basic principles of their design and analysis are described, including detailed A detailed discussion of the materials and technologies used. Special attention is paid to mechanical properties of fabrics, which are crucial for the functionality and durability of these structures. The second chapter deals with the numerical analysis of membrane structures, with an emphasis on the non linear mechanics, the form-finding process for determining the optimal shape of the structure, and methods for calculation of cutting patterns. In the practical part, case studies are presented, including the analysis of prestressed membrane of the Anthropos dance pavilion and the ETFE cushion roof structure. These studies offer insights into the challenges and solutions associated with the design and analysis of membrane structures, including detailed descriptions of the structures, calculation models and load analyses. Specific emphasis is placed on Analysis of the 'ponding' effect, a common cause of failure in these structures.
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Automatic barman
Podrabský, Tomáš ; Horna, Jakub (referee) ; Štohl, Radek (advisor)
I was working on a project of the automated bartender, whose construction has already been done. At the beginning I had to acquaint with construction and understand how it should work. I created the software in developmental environment CoDeSys in version 2.3 and later in version 3.5. Both of them allows the program creation, as well as visualization and online monitoring of PLC operation and debugging. PLC communicates via AS-interface. The aim of this project was to create fully functional application for barman. PLC program is structured as a state machine, which is ideal for this application. State machine is written in the developmental environment in language SFC and its individual steps in LD, ST, or FBD. I focused on simplicity and clarity of the program, in which I tried to incorporate as many features as possible. I managed to create a program that is able to tap one of the 4 or mix of any number of drinks. It can be also said that the operator doesn't want a full glass, but fewer doses than the maximum. The main acquisition for me was the fact that I was able to solve the problem independently, using the programmable controller on a real system, which gave me lots of new skills. The result of this work is fully functional automated barman including visualization that shows the status of sensors, the number of doses for individual drinks and allows to control the whole system and check error messages.
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Drive Vertical Saddle of Machining Centre by Linear Motor
Zapletal, Radek ; Andrýsek, Radim (referee) ; Foller, Bronislav (advisor)
The diploma dissertation deals with the mechanism of vertical movement of a saddle of high-speed machining centre which is made by the Trimill company. The movement of vertical alloy saddle is solved by ball screw. The solution could be improved by replacing the ball screw by linear motor. This will dramatically improve the dynamics of the movement of the vertical saddle. In addition, if the weight is compensated by pneumatic relief and the construction is welded, the dynamics will further improve.
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Design of dual-chamber pneumatic spring
Pantůček, Michal ; Roupec, Jakub (referee) ; Macháček, Ondřej (advisor)
This thesis is engaged in the design of a pneumatic spring which will be useful for a design of a strut intended for cosmic applications. The design will be supported with an analytic calculation which to be subsequently verified by means of experiments, however, those reach beyond the scope of this thesis. The spring will be a part of a strut with adjustable shock damping. For this reason it is desirable for the spring to have the lowest passive resistances occurring mainly during sealing mutually moving parts. For the spring they are the piston, the piston rod and the cylinder. On the theoretical level the thesis should explore the possibility of replacing conventional sealings by unconventional ones and possibly determine the influence upon dynamical behaviour of the spring where the piston would not be sealed at all.
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Increasing the range of a vehicle with alternative propulsion
Dryml, Tomáš ; Ranuša, Matúš (referee) ; Navrátil, Václav (advisor)
The bachelor's thesis deals with increasing the range of a vehicle with an alternative drive, which is compressed air. First, an analysis of the pneumatic circuit is performed, from which the areas to be modified result. To improve, it is chosen to find a suitable working pressure and the correct filling, which is calculated on the basis of constant pressure filling and subsequent adiabatic gas expansion. From the theoretical calculation, the runs per cylinder stroke at different pressures are determined and the selected pressures are subsequently experimentally verified. The results show that the most suitable setting increased the range from 331 meters using the original setting, to 616 meters with the new setting.
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Design and analysis of braking system for cultivator trailer
Dey, Arpan ; Kříž, Jakub (referee) ; Zeizinger, Lukáš (advisor)
A pneumatic drum brake system for a cultivator trailer consists of several components, including the brake drum, brake shoes, pneumatic actuator, air compressor, air reservoir, and control valve. Once the brake pedal is pressed by the driver, the control valve releases compressed air from the air reservoir into the pneumatic actuator (slave cylinder). The actuator converts the air pressure into mechanical force, which pushes the brake shoes against the inner surface of the brake drum. This generates friction, which slows down and stops the trailer. The brake drum is attached to the cultivator trailer's wheel hub and rotates with it. The brake shoes are mounted on a stationary backing plate and positioned inside the brake drum. They are curved to match the contour of the drum's inner surface, maximising the contact area between the shoes and the drum. The air compressor is responsible for supplying compressed air to the system. It draws in air from the environment and compresses it to a much higher pressure, which is stored in the air reservoir. The control valve regulates the flow of air between the reservoir and the actuator, depending on the driver's input (pedal pressure). Overall, the pneumatic drum brake system provides a reliable and effective means of controlling the speed and stopping the cultivator trailer, particularly in heavy-duty applications where high braking forces are required.
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Increasing the range of a vehicle with alternative propulsion
Dryml, Tomáš ; Ranuša, Matúš (referee) ; Navrátil, Václav (advisor)
The bachelor's thesis deals with increasing the range of a vehicle with an alternative drive, which is compressed air. First, an analysis of the pneumatic circuit is performed, from which the areas to be modified result. To improve, it is chosen to find a suitable working pressure and the correct filling, which is calculated on the basis of constant pressure filling and subsequent adiabatic gas expansion. From the theoretical calculation, the runs per cylinder stroke at different pressures are determined and the selected pressures are subsequently experimentally verified. The results show that the most suitable setting increased the range from 331 meters using the original setting, to 616 meters with the new setting.
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Design of dual-chamber pneumatic spring
Pantůček, Michal ; Roupec, Jakub (referee) ; Macháček, Ondřej (advisor)
This thesis is engaged in the design of a pneumatic spring which will be useful for a design of a strut intended for cosmic applications. The design will be supported with an analytic calculation which to be subsequently verified by means of experiments, however, those reach beyond the scope of this thesis. The spring will be a part of a strut with adjustable shock damping. For this reason it is desirable for the spring to have the lowest passive resistances occurring mainly during sealing mutually moving parts. For the spring they are the piston, the piston rod and the cylinder. On the theoretical level the thesis should explore the possibility of replacing conventional sealings by unconventional ones and possibly determine the influence upon dynamical behaviour of the spring where the piston would not be sealed at all.
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