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The study of the spot size influence on the depth of hardening of the material 42CrMo4 during laser hardening
Kříž, Daniel ; Daněk, Ladislav (referee) ; Mrňa, Libor (advisor)
This master thesis is focused on surface hardening by using disk laser. Ten samples made of 42CrMo4 steel were hardened at varying speeds of quenching and diameter of the laser beam. The theoretical part initially describes the types of lasers. Further it describes methods of surface hardness processing such as kinds of hardening and chemical-thermal treatment, followed by description of the used material. Images of macrostructure, microstructure and compared values of hardness of single samples are evaluated in the experimental part. The thesis subsequently contains a technical-economic evaluation. Appropriate parameters for surface laser hardening are evaluated in the conclusion.
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On the modern technologies of hole production in metal materials
Kříž, Daniel ; Humár, Anton (referee) ; Píška, Miroslav (advisor)
The bachelor thesis is focused on the evaluation and description of modern methods of holes production. The first part deals with the classification of methods, description of production, achievable technological parameters and production finishing methods. The second is dedicated to description of tools for holes production by different methods. Third part evaluates machines for holes production. In the last part of this thesis the unconventional methods of holes production are described.
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Analysis of the selected parts of the logistic supply chain in company Východočeská tiskárna, spol. s r.o.
Kříž, Daniel ; Mervart, Michal (advisor) ; Bartoníček, Luděk (referee)
This thesis is focused on analysis of the selected parts of the logistic supply chain in company Východočeská tiskárna, spol. s r.o.. The first part explains the theoretical fundaments that are needed to understand following analysis and rating based on logistics principles. Analysis of parts of the logistic supply chain is the main part of the second chapter. More detailed study is made on topics such as choosing the right way of transport for the way (in /out) (to/from) the company, it is confirmed that company's own transportation service is profitable considering its cost and at the end of this thesis is evaluated company's information system and the cycle of customer's order. At last are given the reasons why the company won't introduce the usage of system of bar codes at the time.
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