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Machining of hard-to-machine materials by turning
Švorc, Josef ; Fiala, Zdeněk (referee) ; Píška, Miroslav (advisor)
The thesis is focused on machining of hard-to-machine materials. In the theoretical part hard-to-machine materials are divided and characterized. Furthermore, the thesis specifies hardened steels and their heat treatment, machinability and mechanism of wear and chip formation. There are tool materials and their classes suitable for machining hardened steels. The practical part deals with the influence of the cutting conditions on the roughness of the machined surface when turning hardened steel.
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Machining of hard materials
Pech, Ondřej ; Kalivoda, Milan (referee) ; Osička, Karel (advisor)
The objective of this paper is to analyse the issue of machining of hard materials on Swiss-type automatic lathes at Decoleta, a.s. In the form of research, analyses are being done of the materials used, possibilities of the available cutting tools and suitable tooling materials. The current technology used in the production of two different stainless steel elements is further being analysed in detail, including the subsequent suggestion of rationalisation actions. These actions include, mainly, the design of new tools from CBN for both elements, which shall replace the current tools made of sintered carbide, but also reworking of production technology for the Pin on another more suitable type of machine, including a new CNC program and complete drawings.
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Machining of Hardened Steel on CNC Machines
Nováková, Eliška ; Prokop, Jaroslav (referee) ; Kalivoda, Milan (advisor)
The bachelor thesis deals with the topic of machining of hardened steels on CNC machines. In the first part there is the description of the company, in which the particular hardened part was machined. The next part of the thesis focuses on properties of hardened steel and their suitability for machining. The middle part of the work states the basic machining technologies used in the company and programming of the CNC machines. Further there are described the materials of the cutting tools for machining of the steel from selected producers/manufacturers. At the end of this thesis the machining of the particular hardened component is described, and the evaluation of the technology procedure is made.
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Machining of rotating parts of hardened steel focusing on the surface condition
Bukovský, Petr ; Osička, Karel (referee) ; Chladil, Josef (advisor)
The thesis deals with machining of rotating parts made from hardened steel. The introductory chapter describes the problems of turning and grinding. The next chapter deals with heat treatment and machined materials. The next lists the used cutting materials. Criteria for evaluating the quality of the surface. A selection of cutting materials for the machining of hardened steels from selected manufacturers. The final chapter is a comparison of the described technologies.
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Machining of quenched steels
Kosmák, Jaroslav ; Zemčík, Oskar (referee) ; Chladil, Josef (advisor)
Diploma thesis deals with machining of hardened steels. In the introductory section it is described the physical process of cutting and basic used technologies of machining. The next chapter provides an overview of cutting materials. Other chapters deal with the workpiece material and heat treatment. Furthermore, there is made a comparison of the cutting conditions while machining of hardened steels by tools from selected manufacturers. As the conclusion there is the economic evaluation.
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