National Repository of Grey Literature 48 records found  1 - 10nextend  jump to record: Search took 0.01 seconds. 
Manufacturing of the sensor holder
Horáček, Jonáš ; Ohnišťová, Petra (referee) ; Harant, Martin (advisor)
The present thesis focuses on developing the manufacturing technology for a polycarbonate holder designed to attach motion and water level sensors to the walls of residential units. Based on an analysis of the requirements and the nature of the component, injection molding is identified as the most suitable production method. Research of this process is further elaborated. Technological calculations are then performed, leading to the design of a quadruple mold featuring a hot runner system and direct gating. Most mold components were sourced from the supplier Meusburger, with the exception of the mold inserts, which were custom-made to facilitate the manufacturability of the mold and reduce costs. A simulation analysis of the filling process was performed to identify potentially hazardous process zones, specifically areas where compressed air could be trapped. Venting solutions were implemented in these zones to mitigate any potential hazards. Following the design specifications and additional calculations, the ARBURG ALLROUNDER 470 C GOLDEN EDITION injection molding machine was selected for the mold. A drawing documentation is attached to the thesis.
Production technology of plastic parts for automotive industry
Šobáň, Jakub ; Ohnišťová, Petra (referee) ; Žák, Ladislav (advisor)
The diploma thesis presents a production technology design of an automotive industry component – a resonator holder. The initial production run of the part is 500 000 pcs. Injection production has been selected based on variant analysis of available technologies. Technological calculations have been performed. The selected material PP 56M10 will be used for operation in granules. A quadruple shaped cavity injection mold with a tunnel gate has been designed. Based on estimated technological properties an Arburg Allrounder 470 A machine has been selected. The break-even point (BEP) shows economic return at the production of 185 595 pcs.
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.
Manufacture of AC / DC adapter housing
Vašíček, Lukáš ; Ohnišťová, Petra (referee) ; Žák, Ladislav (advisor)
The bachelor's thesis proposes an injection mold for the production of a plastic adapter. Based on the evaluation of the technological possibilities of the production of a plastic product, the technology of plastic injection was chosen. The first part of the work is devoted to a theoretical explanation of plastic materials, injection molds and machines. The practical part presents and develops a complete design of the injection mold, including the selection of a suitable material. The mold is designed four times with a cold inlet insert. At the end of the work is a technical - economic evaluation of production.
CNC pocket milling of aeronautical alloys
Wiecková, Kateřina ; Sedlák, Josef (referee) ; Ohnišťová, Petra (advisor)
The aim of the work is to generate and verify pocket milling technology in aviation alloy 7475-T7351 with respect to machine time, surface and machining productivity. First part of the work is theoretical analysis of cycles of milling of simple and complex pockets. Next part of the work is focused on the desing and optimization of strategy of milling of simple and complex pockets in CAM programs and its experimental verification.
Production of corner cover
Hrdina, Vojtěch ; Ohnišťová, Petra (referee) ; Žák, Ladislav (advisor)
The project elaborated design of injection mould for production of corner cover, which serves to protect a reprobox from mechanical damage. The production possibilities were considered at the beginning. The injection molding technology was chosen from available technologies. The first part of the thesis is theoretic, plastics and injection molding are investigated. The choice of suitable polymer and the entire draft of mold is in the second part of thesis. The final mold is two-cavity with cold runner system. The technical and economic assessment of the proposal is carried out in the last part of thesis.
Spline interpolation in CNC milling
Soukupová, Veronika ; Píška, Miroslav (referee) ; Ohnišťová, Petra (advisor)
Tato práce se zaměřuje na využití různých typů splinové interpolace pro obrábění na číslicově řízených strojích. Cílem této práce je teoreticky popsat využití splinových interpolací při CNC frézování a následně stanovit a zhodnotit limity využití různých typů splinových interpolací na základně daného objemu vstupních dat. Součástí práce je vytvoření programu pro generaci různého počtu uzlových bodů na analyticky známé křivce. Následuje vložení uzlových bodů do vytvořeného CNC programu pětiosého obráběcího centra a poté jeho verifikace. Pro stejné uzlové body jsou aplikovány různé druhy interpolace pro následné porovnání metod a stanovení minimálního počtu bodů na délku křivky pro dosažené vyhovující přesnosti při použití dané interpolační metody.
Streamlining production technology for specified pinion housing
Sádlo, Dominik ; Ohnišťová, Petra (referee) ; Zemčík, Oskar (advisor)
The aim of the thesis is to propose a new technology for the production of the specified pinion case and to compare it with the existing technology. At the beginning of the thesis are described the basic characteristics of the bushings and the use of the worm housing part produced by Wikov MGI. In the next part, attention is paid to the current technology of production and its evaluation. The practical part includes the choice of the machine, the clamping mechanism and the tools necessary for making the part. The last chapter of the thesis compares three variants of the technological process, in terms of time-consuming operations and economical advantage for Wikov MGI.
Design of part machining including it´s assembly
Ryšavý, Radek ; Ohnišťová, Petra (referee) ; Kalivoda, Milan (advisor)
This diploma thesis is focused on piece production of the component and its subsequent assembly. It is an interchangeable spindle head marked VA1 from the product portfolio of TOS KUŘIM - OS, a.s. The aims of the diploma thesis include the characteristics of the assigned component, the subsequent analysis of the current manufacturing and assembly process. In the price calculations chapter, the direct and indirect input costs for the part production are quantified. Proposals to improve production were presented to the company and offered for possible implementation.
Handle parts production
Janáč, Ondřej ; Ohnišťová, Petra (referee) ; Žák, Ladislav (advisor)
The work submits the proposal of solutions of mold for specified components. An injection mold with all the essentials was designed based on literature study of plastic injection molding and calculations. Defining of multi-cavity molds, size of the runner system, temperature control and ejector system. The mold is largely designed from standard parts. The whole assembly is compatible with the Arburg Allrounder 520S injection molding machine. It has a clamping force of 1600 kN. The mold plates are made of tool steel of grade 1.2083, which is alloyed. The work contains drawing documentation of the injection mold.

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1 Ohnišťová, Pavla
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