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Wear of cutting tools at CNC production of the disc-shaped parts
Malý, Michal ; Polzer, Aleš (referee) ; Píška, Miroslav (advisor)
This diploma thesis evaluates two competitive cutting inserts for machining of disk-shaped blanks. The first part summarizes theoretical knowledge of turning, wear of cutting inserts and cost analysis of the cutting process. In the second part, the wear of two inserts from a different manufacturer is observed in two different cutting speeds. Wear is evaluated by electron microscope images. In the end, there is an economic evaluation of both VBD in different cutting speeds for serial production.
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Production of Knives
Suchý, Jan ; Kalivoda, Milan (referee) ; Polzer, Aleš (advisor)
This theses deals with cold weapons topic. The first part describes historical development of European swords and weapons originating from them. Further on the thesis presents material analysis and comparison of steels used for cold weapons production. It also shows different production methods including a brief note about the difference between forged and gringed blade. Then the thesis outlines differences among various blade shapes and how these shapes define their cutting characteristics and usage. The closing part of the thesis deals with blade geometry and grinding technology.
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Technical preparation of a handgun component production
Blažek, David ; Sliwková, Petra (referee) ; Polzer, Aleš (advisor)
The main goal of this diploma thesis is to propose ways of producing a firing pin. Reverse engineering is applied to the specified component. In the first part of the thesis, the function of the firing pin, clamping of eccentric components on the lathe, types of production according to serial number and selected machines are described. The second part goes through the measurement that is implemented in the practical part. After measuring and evaluating the results, several fuze production technologies were proposed. An ISO code was created for them, which was then simulated. The times and other aspects of the given technologies were subsequently compared and evaluated. For the required series of 10,000 pcs, it is suitable to use turning technology with machined jaws or technology using pressing and compound tools.
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Application of GibbsCAM software for machining
Gerbel, Jakub ; Kalivoda, Milan (referee) ; Polzer, Aleš (advisor)
The main subject of this thesis is the application of GibbsCAM software in machining. In this thesis, a system analysis of the problem solved is carried out, especially concerning CAD/CAM systems, machining of deep pocket corners and the distribution of touch probes. From a practical point of view, the work is realized with the company JHV - GROUP s.r.o. The goal of the work is to design the actual component and create a 3D model in the CAD system CREO Parametric. Programming of its production with application of in-process measurement was performed in GibbsCAM software. The proposed procedure is verified in Vericut software. Subsequently, the production of the part is realized on a selected CNC machine tool and then the measurement on a 3D coordinate measuring machine. The application of in-process measurement on the selected CNC machine with a FANUC control system, is realized by Renishaw Inspection Plus measurement cycles. The obtained results are evaluated and discussed in the final chapter. From the results drawn, recommendations and suggestions for the industrial enterprise are made.
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Measurement of small arms components - influence of grinding technology
Havlík, Daniel ; Kalivoda, Milan (referee) ; Polzer, Aleš (advisor)
This master thesis deals with the problem of measuring the surface texture parameters of a small arms component when applied to the hammer of a revolver. The measured component was manufactured by chip machining, specifically by grinding technology. The paper describes the design and execution of an experiment aimed at monitoring the effect of changes in technological conditions (cutting conditions) on the surface texture of the component.
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Design and production of selected 3D printed metallic parts
Masson, Quentin ; Polzer, Aleš (referee) ; Píška, Miroslav (advisor)
Thales LAS France currently has parts of their system that are manufactured by forging or casting. Nowadays the tools and equipment for those processes are getting worn, the sub-contracting company in charge of some of casted parts can’t guarantee the quality of those parts anymore. Moreover, Thales recently has set up a plant specialized in metallic additive manufacturing and the policy of production is to encourage the production in that subsidiary. In order to adress those issues, Thales LAS France managed to prepare his design office for designing parts that will be 3D printed. My function is to establish a methodology for the mechanical design of parts that will be manufactured in additive manufacturing. Once the researches about the process and the different technologies will be done, I will establish steps that must be achieve for the mechanical design of a piece or a system. The methodology will take into account the physical properties that can be guaranteed by the process and their flaws such as the porosity for instance, the constraint linked to the technology and if possible apply to the part a topological optimization.
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Research of a Cutting Tool with a Diamond Active Part
Trčka, Tomáš ; Mrkvica, Ivan (referee) ; Chladil, Josef (referee) ; Polzer, Aleš (advisor)
The submitted dissertation is focused on research in the field of milling tools with a diamond active part when machining one of the difficult-to-machine materials (Ti-6Al-4V). The first chapters are dealing with a theoretical analysis of a given workpiece material and polycrystalline diamond (PCD) as a super-cutting material. One of the theoretical chapters is also focused on tool sharpening technologies, for which the hardness of a diamond is no longer a crucial factor. The main part of the dissertation is the design, construction and production of tools taking into account the technological design, along with the application of modern trends and technologies enabling innovation and progressive design – from the perspective of macro/micro tool geometry and insert sharpening technology. The research was focused on the application of own inserts on the insert rake face and specific sharpening technologies EDMG, WEDM and LASER. One modification of the face of the PCD insert with a laser was subsequently applied to prototype circle segment end mill. Detailed analysis of manufactured tools and workpiece material was performed by electron, optical and digital microscopy. The measured parameters in the subsequent analysis of the machining process were force loading, tool wear, temperature measurement using a thermal imaging camera and analysis of the machined surface in the form of microhardness and roughness measurements.
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Analysis of risks of digitisation of production in an industrial enterprise
Vínovský, Jan ; Polzer, Aleš (referee) ; Rozehnalová, Jana (advisor)
Industry 4.0 is also currently known as the "fourth industrial revolution" or the "digitization of industrial production." Like other industrial revolutions that have already taken place during human development, the latest brings a large number of changes and new methods or technologies that aim to facilitate and make human work as efficient as possible. The final work explains what the "fourth industrial revolution" is, its basic principles and methods that are already used today. Furthermore, this work examines the extent to which Industry 4.0 is introduced in the Czech Republic, the EU and the world, and how it is regulated through legislative frameworks. An analysis was then created focusing on the risks incurred and proposing a solution.
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Application of the CAD/CAM software and Sinumerik control system in machining
Láznička, David ; Kalivoda, Milan (referee) ; Polzer, Aleš (advisor)
This Master´s thesis is focused on the design of a shaft component and its production using CAD/CAM software and the Sinumerik control system. The first part is devoted to the analysis of current possibilities in NC programming. In the next part, the actual design of the rotating part and the elaboration of the necessary technical documentation is performed. The last part is the verification of the developed NC program using graphical simulation and justification of the chosen solution.
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