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Design of stand for torque measurement
Zerzánek, Ondřej ; Zeizinger, Lukáš (referee) ; Čípek, Pavel (advisor)
This bachelor thesis deals with design of stand for torque measurements and additional fixtures. Issue is realized by aluminium profile systems and manufactured or purchased parts. Solution takes in account limited manufacturing options. Final part of this thesis is 3D model and critical evaluation of design. This thesis is useful example of how to create torque stand instead purchasing expensive commercially available stand.
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Testing of automotive sport suspension
Čípek, Pavel ; Růžička, Bronislav (referee) ; Strecker, Zbyněk (advisor)
The diploma thesis deals with testing of sports car suspension. The aim is the testing of fast magnetorheological damper in semiactive suspension that corresponds to quarter car model. The fast magnetorheological damper has a response time 2 ms. If the response time is short enough (order of units miliseconds) it is possible (based on earlier simulations) to achieve improvement of driving safety (better stability of force of tyre on roadway) and comfort (reduction of vibrations). The thesis proves this statement with series of experiments.
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The design of clamping equipment for tensile testing of car door hinges
Daněk, Jiří ; Čípek, Pavel (referee) ; Klapka, Milan (advisor)
This thesis deals with the problem of clamping fixture for tensile tests of car door hinges. The aim of the thesis was to design a new preparation that will replace the current one that is not satisfactory. All the goals of the thesis were met, the output of the thesis is a design of a product that meets the requirements of the standards and the customer. On the basis of the control calculations, drawing documentation was created and then Edscha had the new product manufactured. The product has been in operation for more than half a year and meets all requirements.
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Design of equipment for excitation of vibrations
Čípek, Pavel ; Šperka, Petr (referee) ; Frýza, Josef (advisor)
The bachelor thesis deals with the design of module for excitation of vibration. The module is a part of optical tribometer, a laboratory device. The tribometer simulates an interaction of two objects (steel ball and glass disc) in the presence of a lubricant. Very thin lubricating films between the objects are examinned. The new version of the tribometer enables research of lubricating film in conditions close to real contacts. The designed module uses an eccentric mechanism for excitation of vibration in a direction of the axis ball rotation. Set up of amlitude is enabled by changing eccentric part of the mechanism.
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Friction measuring of human joints
Šnejdar, Radim ; Ranuša, Matúš (referee) ; Čípek, Pavel (advisor)
This bachelor thesis concerns about the tribology of real joints. The aim of this work is an elucidation of the influence of chosen operating conditions on shear force coefficient. It deals especially about speed, strain and rehydration. The experimental tasks will be realized on tribometer, which is available in laboratories of ÚK. In this work, current state of knowledge in the area of discussed issues are described. Also the device and measured methods which help to measure and evaluate data files. In the last section of this work, the results are evaluated and the following conclusions are established.
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Adaptation of shock absorbers testing device on contact fatigue testing of dynamically loaded surfaces
Nepovím, Lukáš ; Čípek, Pavel (referee) ; Dvořáček, Jiří (advisor)
This bachelor’s thesis deals with the design of an adapter for the modification of a test device, where the automatic tensioners (dampers) of automotive belts are tested. The proposed adapter allows to test the functionality of the valve tappet assembly. The design of a simple test methodology is also a part of the solution. The first part of the thesis deals with the overview of the given issue. Subsequently, the design variants of the adapter and the loading methodology of the tested component are proposed. The main part describes the design of the adapter, the method of lubrication of the tested component, the measuring equipment used in the experimental test and the design of the test methodology. The complete drawing documentation of the adapter is the output of this work.
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The design of a quadrocopter for food delivery
Gryc, Matěj ; Čípek, Pavel (referee) ; Skurka, Šimon (advisor)
Online delivery of hot food to the customer's home has become standard. However, as a result of the covid-19 pandemic, methods of safe delivery that do not require interpersonal contact are now being sought. The use of drones, which are already being used in some countries to transport goods and materials, seems promising. This bachelor thesis deals with the design and assembly of a quadcopter designed for food delivery. First, the frame was designed, which was largely fabricated using 3D printing. Based on calculations, the electronics including batteries and motors were selected. Then the mechanism by which the food transport will be mediated was designed. Once constructed, the functionality of the quadcopter and delivery mechanism was tested. Finally, the design was evaluated and possible improvements were mentioned.
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Design of a sample grinding jig
Potoček, Samuel ; Čípek, Pavel (referee) ; Omasta, Milan (advisor)
Friction analysis using the device Mini-Traction-Machine (PCS Instruments) leaves a minor amount of surface and subsurface damage on the test surface of samples. Samples like this cannot be used for further testing. This thesis deals with the design of a grinding head that can be mounted on an existing manual grinder owned by BUT FME. In the first, research part of this thesis can reader learn about methods and machines commonly used for metallographic grinding and polishing, which inspired the design of this device. In the next chapter were proposed 3 concept designs of a sample holder, from which was one chosen to be further expanded in the last part of the thesis. The result of this thesis is a design of a grinding head able to work in a semi-automatic manner, working with more samples at the same time. The device regrinds or repolishes the damaged samples so that the samples can be reused for more friction testing. This in turn reduces the costs of test samples.
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Design of a milling table for machining wooden boards
Uhlíř, Radim ; Mazal, Pavel (referee) ; Čípek, Pavel (advisor)
The bachelor's thesis deals with the design and implementation of a milling table for machining wooden boards. In the research part, an analysis of the solutions available on the market was performed together with an analysis of workpiece fixtures, hand milling fixtures and linear guides. Based on the research, two conceptual solutions and several variants of structural nodes were proposed. The most suitable constructional solution was selected from the conceptual solutions, calculations of critical nodes were performed and drawing documentation was made. Subsequently, a prototype of the table was made and its functionality was tested. The table can clamp and machine a wooden board with maximum dimensions of 1000 x 800 x 100 mm.
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Comparison of frictional properties of cosmetic massage products
Dohnal, Petr ; Čípek, Pavel (referee) ; Vrbka, Martin (advisor)
This bachelor’s thesis examines tribological properties of massage products (creams and oils). Its aim is to create a comparison of the selected products. Tribometer in the pin-on-plate configuration was used for the experiment because of its ability to simulate the process of rubbing the product on the skin. Cowhide was used as a model of human skin. The attributes of products were compared based on the characteristics of the coefficient of friction during the measurements. Through the experiments a suitable parameter was found for easy comparison of the product's durability. According to the results the best oil was selected in terms of durability and lubrication. The thesis could be used as a basis for creating a standardised method for evaluation and selection of products suitable for massage purposes.
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