National Repository of Grey Literature 162 records found  1 - 10nextend  jump to record: Search took 0.00 seconds. 
Heidenhain tools for programming of CNC machines
Farka, Jan ; Sliwková, Petra (referee) ; Polzer, Aleš (advisor)
Modern machine tools are equipped with control systems, which are the imaginary brain of the whole machine. These control systems are developed, further managed, and constantly innovated by many companies, so it is clear that there is a kind of competition in the field of control systems. The aim of this work is mainly to describe the possibilities of one of the greats among developers of control systems from the company Heidenhain and also a thorough comparison of this system with systems from other manufacturers. Last but not least, other Heidenhain products and their possibility of use in practice will be presented in the work.
Sinumerik Operate tools for programming of CNC machines
Krejčík, Jan ; Sliwková, Petra (referee) ; Polzer, Aleš (advisor)
The diploma thesis is focused on possibilities of spline approximation and interpolation of CAD imported by CAD Reader to control system. First chapter describes mathematical meaning of curves, the second chapter shows possibilities of approximation and interpolation in control system Sinumerik 840D and the third chapter applies these possibilities on practical example.
A study of cutting forces during the turning process and their measurement
Piroš, Viktor ; Trčka, Tomáš (referee) ; Polzer, Aleš (advisor)
This bachelor’s thesis is structured as a literature search. Its target is to show a complex look at the problematics of force load in turning process. In the beginning, the thesis is focused on brief characteristics of turning process and tool geometry as a one of the main aspects influencing the force load in the machining system. Furthermore, the thesis deals with problematics of force load creation and its dependence on basic cutting parameters. Second part of the thesis is dedicated to the options of force load measurement in turning process and works out an illustrative example of numerical evaluationof measured data with basic statistical indicators in detail.
Machining of hardened parts
Havlík, Daniel ; Osička, Karel (referee) ; Polzer, Aleš (advisor)
This bachelor thesis is focused on the machining of hardened parts. The beginning of the work is devoted to the analysis of specific materials, 42CrMo4, 42CrMoS4 and 50CrMo4. Next described thing is heat treatment. The main part of this work consists of theoretical analysis turning of hardened parts and theoretical analysis of the thread whirling of ball screw, where the principle of ball screws is also described.
Technical preparation for the production of label carriers and RFID inlays
Blažek, David ; Sliwková, Petra (referee) ; Polzer, Aleš (advisor)
This bachelor thesis deals with the development and production of end effectors for the transmission of labels and RFID inlays using robots. The first part of it describes the RFID technology, robots and their end effectors, then compares the materials for the design of the end effector and its subsequent production. Then follows the preparation of a practical implementation, where the analyses examining the channels inside the effector are described. Furthermore, this work describes the testing of suction cups, production control by graphical simulation, production of individual prototypes of end effectors and their testing.
Machining of hardened parts
Heiserová, Sofia ; Sliwková, Petra (referee) ; Polzer, Aleš (advisor)
The usage of quenched materials in industrial production leads to the application of hard machining. Higher requirements for machines and cutting tools are needed during hard machining than during conventional machining. Quenched materials carry problem of volume and geometric changes after quenching and after machining as well. It is necessary to think about volumetric compensation in advance, before quenching of the workpiece. An experiment is suggested for optimalisation of longitudinal turning of steels 42CrMo4 and 50CrMo4. Hard turning has notable benefits such as flexibility of cutting tools and elimination of coolants, which provides ecological benefits. However, the disadvantages are higher tool wear and high prices of tools.
Development and manufacturing of insert for satellite sandwich panel structure with tailored mechanical characteristics
Raška, Tomáš ; Polzer, Aleš (referee) ; Píška, Miroslav (advisor)
Cílem práce bylo vyvinout vložku se speciálními mechanickými vlastnostmi pro satelitní strukturu ze sendvičových panelů. Problém byl analyzován a byla navržena inovativní konstrukce vložky založená na existující aplikaci, přičemž byla brána v potaz proveditelnost výroby. Návrh byl ověřen pomocí metody konečných prvků. Práce se také zabývá technologickým návrhem výroby vložky. Nakonec byla představena metodologie zkoušky pro ověření návrhu vložky.
Force loading of milling tools during the machining process
Švec, Michal ; Trčka, Tomáš (referee) ; Polzer, Aleš (advisor)
This thesis compares the force load of two kinds of cutting tool inserts while milling. The thesis is devided into two main parts – research and experiment. The research part is focused on the theory of the force load measuring, cutting tools and cutting tool inserts and their coating. 14 grooves were made with each cutting insert while the force load was measured. Constant cutting conditions were applied. The experiment was repeated four times for each kind of cutting insert. The aim of the thesis is to determine if both kinds of inserts mill with the same force load. The results reveal that one kind of cutting tool inserts mill with the force load higher up to 85 %.
Battery pack for an electric car
List, Jaroslav ; Kalivoda, Milan (referee) ; Polzer, Aleš (advisor)
Thesis deals with the design of a battery box with lithium-ion technology, for the largest possible driving range of the BUT SuperEL II electric car. Based on the analysis of the electric vehicle available space and the parameters of the electronic system, the maximum size of the entire set of 84s130p batteries was designed. 18650 cells with NMC technology were selected due to the very high gravimetric and volumetric density, which reaches 274 Wh/kg and 564 kWh/m3. The total nominal capacity of the designed battery boxes in the electric car is 138 kWh. The total gravimetric energy density of the designed box is 215.6 Wh/kg. It allows the electric car to reach the theoretical range with a consumption of 14 kWh/100 km of almost 1000 km. The individual battery modules of the battery box are controlled for optimal operating conditions by means of a BMS. The whole set is divided into 5 battery boxes. These boxes are manufactured using the technology of bent welded sheets from aluminum alloy EN AW 1050A and steel 1.4301. FEM analyzes were performed to verify the mechanical strength of the designed structure. The work also deals with the design of battery modules and their connection.
Force loading of cutting tools during the machining process
Vančura, Tomáš ; Trčka, Tomáš (referee) ; Polzer, Aleš (advisor)
The theoretical part of the diploma thesis summarizes a knowledge of the force loading of the cutting tools and state of the art in the cutting force measurement. In the experimental part, work deals with the development of the software for a force records analysis. The main objective of the software is to automatise the processing and analysis of the measured force records. The functionality of the newly created software was verified by evaluating the circle-segment end mills experiments performed at the Institute of Manufacturing Technology of the Faculty of Mechanical Engineering, BUT.

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