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A technological preparation of the wiping plate production
Balhar, David ; Dvořáková, Jana (referee) ; Píška, Miroslav (advisor)
The main aim of this master's thesis is to propose a technological preparation of the wiping plate production. Elaboration is divided into four chapters. The first chapter describes forming tool (function and construction). In the second chapter is technologies overview, which are used for the wiping plate production. The most important is the third chapter, because it deals with the main output, and the actual proposal of technological preparation of the production. In the fourth chapter, production is reviewed economically.
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Technological, economical and ecological aspects of dry machining
Vostřel, Josef ; Csölle Putzová, Ildikó (referee) ; Píška, Miroslav (advisor)
Using of process liquids improves the procedure and results of machining, on the other hand, increases costs and raises some ecological and hygienic issues. In the work there is gradually analyzed mechanism of chip formation, progress and distribution of heat and thermal fields as well as economic and ecological aspects of dry machining and influence of dry machining on durability of tools. In the experimental part there are evaluated data which were measured during the drilling of cylindrical workpiece with regards to progress of workpiece thermal fields while using various kind of tool coating. In the final part there are stated recommendations for practice.
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On the production of an agricultural machinery part and its optimization
Tenora, Tomáš ; Osička, Karel (referee) ; Píška, Miroslav (advisor)
This master's thesis deals with the process of machining a forged connecting rod in cooperation with the company Zetor Tractors a.s. The first chapter of the thesis is focused on a detailed introduction of the company. The second chapter includes an elaborate analysis of the technical documentation and requirements concerning the making process of the subject of study, specifically the construction of the connecting rod. In the third chapter, the current production technology is discussed and described in detail. The aim of the fourth chapter is to propose an innovative technology which can be used for the production of connecting rods in the required quality. The fifth chapter is aimed at testing the newly designed technology. In the final, sixth, chapter, a technical and economical evaluation of the proposed procedure is performed.
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Finishing machining of hard-to-machine materials
Filípek, Timotej ; Varhaník, Matúš (referee) ; Píška, Miroslav (advisor)
The Master‘s thesis focuses on processing of hard-to-machine materials by the finishing machining methods. The first chapter comprises division and characteristics of finishing technologies in the field of machining processes. The chapter following includes division and characteristics of the hard-to-machine materials. The experimental part – another significant part of the thesis – is focused on grinding of mostly bearing rings made of hard-to-machine materials. The aim of the experimental part is to compare and subsequently assess the use of various kinds of grinding wheels in the grinding process of a given workpiece material. Several parameters are examined from the technological and economic point of view. The assessment of the experimental part provides an overview on the advantages and disadvantages of the use of the grinding wheels in the grinding process of a given material for large-scale production. The conclusion is a summary of the results obtained in the experimental part.
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Measurement of Production Overall Equipment Effectiveness
Žanda, Miroslav ; Novák, Josef (referee) ; Píška, Miroslav (advisor)
The diploma work deals with measurement of Production Overall Equipment Effectiveness in manufacturing company Alfa. Firstly, is processed the theoretical part concerning general production, TPM, lean manufacturing and OEE. After than is described the company, monitored device and technology used by the device. In the final section is evaluated the OEE for January, February and March; analyze downtimes, mistakes and losses and their solutions are proposed. The last chapter is devoted to the economic evaluation of the proposal.
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Spline trajectory in 5-axis milling
Ohnišťová, Petra ; Polzer, Aleš (referee) ; Píška, Miroslav (advisor)
The aim of this work is an introduction to the five-axis milling with polynomial trajectories. Part of this thesis is a description of the entire process of the forward engineering, a definition of different methods of trajectory generation, a basic mathematical description of the machined surface and generating a CNC program for five-axis machining centre with the Heidenhain control system.
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Workplace design for machining of motor shafts
Knobloch, Martin ; Slaný, Martin (referee) ; Píška, Miroslav (advisor)
The main goal of this bachelor’s thesis „Workplace design for machining of motor shafts“ is setting a new technology of machining shafts in the Siemens s.r.o., o.z. Elektromotory Mohelnice. At the beginning a theory of production preparation is described and the nowadays methods of production. In the next part of the work the present production and evaluations of most critical spots are described. Two proposals of the new workplace are offered. In the end of bachelor work the economical aspects of the new workplace are considered.
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Vibrations at machining of metals
Fiala, Zdeněk ; Polzer, Aleš (referee) ; Píška, Miroslav (advisor)
The diploma work deals with a mathematical description of vibration and its generation when machining. Moreover, some techniques of modal parameters measurement in the theoretical part are included. The practical part is designed and based on the measured natural frequencies of the machine with specific tool and materials. In conclusion, a lobe diagram stability for semiautomatic lathe SPN 12 CNC and selected machining operation is specified by means of apparatus.
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