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Manual programming of CNC machines
Stránský, Michal ; Sedlák, Josef (referee) ; Píška, Miroslav (advisor)
Theme of my bachelor thesis is focused on the manual programming of CNC machines. The thesis is divided into 4 parts. First part is focused on the history and introduction of programming of CNC machines. Second part explains manual programming of CNC and its place in manufacture process. The third part is focused on a automatization of manual programming works. Last part of the bachelor thesis contains a program made with the SINUMERIK 840D control system.
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Regenerative chatter in turning
David, Václav ; Jaroš, Aleš (referee) ; Fiala, Zdeněk (advisor)
Regenerative chatter in turning negatively affects the cutting process, the tool live and the machined surface. In this work is a vibration discriebed by using mathematical formulas or terms. There are listed some causes of creation vibration in turning and some basic methods of complete removal or partial reduction. The second part of this work contains examples of measure and analysis in connection with using of modern software.
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Manufacturing possibilities of sparking plug body
Strnad, Miroslav ; Kopřiva, Miloslav (referee) ; Podaný, Kamil (advisor)
Difficulties of manufacturing sparking plug body are analyzed in this thesis, which aims to select the most appropriate option. Body is circular section of steel 1.1191 (12 050), with a hole in the middle and upper part of this body is ended with hexagonal shape. The series is estimated at 1 000 000 units per year. For the production of sparking plug body are selected options from the machining and forming technologies. Specifically, turning and milling, casting, forging, a method using superplastic material and cold extrusion. Selected technologies will be reviewed based on cost to produce one piece, time requirements of manufacture of the unit, material usability and overall feasibility. According to these parameters forming is chosen as the best option.
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New methods for outer rotary surfaces finishing.
Bartošík, Luděk ; Janský, Milan (referee) ; Zemčík, Oskar (advisor)
This bachelor thesis deal with technologies of finishing rotate surfaces, describe individual methods, their advantages and disadvantages and results on quality of surface. It describe older and new technologies and too conventional and unconventional methods. Here is overview of most used and best know technologies in present engineering.
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Solution technology of two groove guide pulley production.
Šimonek, Ondřej ; Sedlák, Josef (referee) ; Kalivoda, Milan (advisor)
Technology deals with the production of the two - groove guide pulley for two types of semiproducts. Technological process of production solves the production of the guide pulley from the first gripping of semiproduct to handing over of the guide pulley to the warehouse. Semiproducts are two types of castings with different separating plane. The material of the guide pulley is always gray - cast iron ČSN 42 2420. Production method is cutting operation with CNC machines. The production uses tools with interchangeable cutting tips. The aim of this work is to find the most optimal method of production from both time and economic perspective and to compare the two variants.
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Turning tools
Václavek, Jiří ; Sámelová, Vendula (referee) ; Humár, Anton (advisor)
The bachelor's thesis deals with turning tools and compares domestic and foreign companies' products. The turning is generally described with basic formulas in the first part of the thesis. The second part is aimed on tools, categories of tools and materials which they are made of. In conclusion, there is comparsion of several tools from domestic and foreign producers.
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Solution wear of tool with inserts in condition technology of turning.
Kružík, Petr ; Humár, Anton (referee) ; Kalivoda, Milan (advisor)
This bachelor thesis analyzes wear occurrence at chosen tool inserts in the process of turning of a heat treated cylindrical workpiece. Inserts for turning have been chosen from the area of coated and non-coated cemented carbides and cermets with respect to the used type of workpiece material. The work further deals with the possibility of their use under cutting conditions that are set to the upper cutting limits from the recommended range, especially without cooling. To obtain detailed information, the conditions of the test are further modified. Then, the results are also evaluated from the point of view of costs, i.e. market prices of inserts for possible application in the manufacturing process.
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