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Laser Forming
Kameník, Jan ; Peterková, Eva (referee) ; Řiháček, Jan (advisor)
The work focuses on the use of laser beam in forming. The basic types of solid-state and gas lasers and their interaction with the material are described. It also discusses the possible mechanisms of bending in sheet metal and tubes. Subsequently, the paper discusses analytical and numerical models for determining the magnitude of the bending angle. The final part of the thesis deals with examples of laser-formed products and other possible applications in engineering.
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Manufacturing of protecting cover by compound tool
Janáč, Jakub ; Řiháček, Jan (referee) ; Peterková, Eva (advisor)
The master‘s thesis deals with a proposal of the manufacturing of a protective cover, which is sheet metal part with a thickness of 3 mm from the EN AW-3103 alloy. According to the analysis of possible technologies, the most effective option is production in a progressive die. This combines cutting and bending and these technologies are analyzed in a literature study. Based on the assessment of the technology control and control calculations a die is designed. This die produces the part in five steps. As a suitable machine an eccentric press Vaptech PE160MA is chosen.
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Manufacturing of start segment by fineblanking technology
Tichoň, Ondřej ; Řiháček, Jan (referee) ; Peterková, Eva (advisor)
The thesis deals with the design of the manufacturing technology of the starting segment, which is used to transmit the torque from the starting lever of the motorcycle. The part is made of steel 11 373 in the form of a sheet with a thickness of 6 mm, and the production series is set at 60,000 pieces per year. As part of the thesis, an innovation was proposed, which consists of cold pressing the shaft into the hole, and thereby eliminating the associated welding operation, speeding up production and making it more precise. Due to the required precision and the size of the series, a fine blanking was chosen for the production of the starting segment. Furthermore, coils of sheet metal were chosen as a semi-finished product, while 19 coils with a diameter of 1400 mm and one incomplete coil with a diameter of 1085 mm are needed to ensure the production series. The total force for cutting out two components in one stroke was determined to be 4680,4 kN. Due to the given strength and dimensions of the sheet metal, a triple-action hydraulic press FB one 7000 was chosen for production. The work also includes a technical-economic evaluation, through which it was found that the given production becomes profitable at 34987 pieces. Therefore, due to the size of the production series, it can be declared that the production is profitable.
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Optimization of a machine assembly process
Obořil, Filip ; Řiháček, Jan (referee) ; Štroner, Marek (advisor)
The diploma thesis deals with the optimization of the assembly of a machine designed for printing paper material. In the introduction, the company Windmöller & Hölscher, with which the work was collaborated, is introduced. The theoretical part is focused on lean production methods and types of industrial printing. In the practical part, the design is optimized with the use of lean production, adjustment of the assembly procedure, creation of instructions and adjustment of the layout of the assembly box. The proposed optimizations are subsequently evaluated from a financial point of view and, if possible, the return on investment is calculated.
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Production Design of the Bicycle Disc Brake
Brejčák, Dušan ; Císařová, Michaela (referee) ; Řiháček, Jan (advisor)
The solved problem is production of brake disc, which is part of bicycle´s disc brake. For production is chosen rustproof steel ČSN 17 024. The thickness of materiál is 2 mm and there are 200 000 pieces produced per a year. After assessment of manufacturing variants the best method is fine-blanking technology with v-ring and there is developed a literary recherche for this matter. Then there are evaluated technological and control calculations. For production as semiproduced material is chosen roll of sheet metal with its outside diameter 1 200 mm. There is made a suggestion of design of cutting tool and for manufacturing it is chosen hydraulic press Feintool HFA 4 000.
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Development of Transport Cart with Stretcher
Bastl, Dominik ; Císařová, Michaela (referee) ; Řiháček, Jan (advisor)
The diploma thesis deals with the design of a transport gurney with a stretcher for people up to 150 kg. The aim is to design the simplest possible construction of bent and welded pipes and profiles with a thickness of 1.5 and 2 mm from E235+CR1 S2 steel, based on an already functional product on the market, taking into account the commissioning company's available machinery AUDY s.r.o. The theoretical part of the work is devoted to the main production technologies, i.e. bending and welding. A literature search is prepared for the mentioned technologies. Bending is more focused on length of the blank and springback angle. In welding, the weldability of the selected steel is assessed, a suitable welding wire with shielding gas is selected and the process parameters are determined. Theoretical findings are compared with practical outputs. The practical part includes design, prototype production and trial tests to verify the reliability of the new product. Necessary construction and technological calculations with basic drawing documentation are also included.
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Manufacturing of the Motorcycle Cover
Jindrák, Martin ; Harant, Martin (referee) ; Řiháček, Jan (advisor)
The bachelor's thesis deals with the production of a motorcycle protective cover made of steel 11 320 with a thickness of 1.5 mm. The production batch is set at 80,000 pieces per year. Based on the analysis of the production methods and according to the prescribed requirements, deep drawing is chosen as the appropriate method. The manufacturability is verified with the help of calculations, which is followed by the design of the ideal shape of the semi-finished product. The cut will be laser cut from a sheet of metal. After carrying out the technological calculations, the tool is constructed, including drawing documentation. A suitable machine is chosen for the tool, which is a universal hydraulic press CTH 250. The conclusion of the work is focused on performing a simulation to check the yield.
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Production Design of a Holder for Paddle Valve and Pressure Gauge
Bílek, Jan ; Harant, Martin (referee) ; Řiháček, Jan (advisor)
The bachelor thesis is focused on the design of a suitable manufacturing technology for a sheet metal holder for valve and pressure gauge control for buses. A 1.5 mm thick sheet metal roll was chosen as a semi-finished product. S235JR structural steel was selected as the optimum material. The production series was set at 150,000 pieces per year. After evaluating suitable production methods, the technology of sequential shearing and bending combined in a combined tool was chosen. In the proposed tool, the part will be produced in four steps from 11 rolls with 95.85 % utilization. The production will be carried out in a Mecânica Exacta eccentric press, model CC100, supplemented by a coil unwinding device.
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Manufacturing of a Wheel Nut With Outer Hexagon
Dvořák, Ondřej ; Forejt, Milan (referee) ; Řiháček, Jan (advisor)
The thesis deals with the design of a production technology for a wheel nut with an external hexagon, a tapered seating surface, and a shank. The production series is set at 200,000 pieces per year. The raw material is a coil of wire with a circular cross-section and a diameter of 20 mm made of steel 11 320. After evaluating the specified requirements and conducting a literature review, the production technology of cold forming is selected, specifically the combination of extrusion and upsetting. Three basic production processes are designed, which are subsequently optimized, and their manufacturability is verified using the simulation program Simufact Forming 1.6. For the most suitable production variant, the flow stress, deformation resistance, and forming forces are calculated for each operation. By comparing with the simulation results, the total force required to produce the given nut is determined, which is crucial for selecting a suitable machine. The forming machine used is a CBF 204L with a nominal force of 3,500 kN, for which a three-operation tool is designed. During the tool design, the internal radial pressure acting on the die is also verified. The results indicate that it is necessary to use encapsulation using a single clamp for the second operation. The tool is constructed to be compatible with the parts of the chosen machine according to the provided layout and available machine parameters.
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Manufacturing of the Oil Drain Tub
Hruška, Daniel ; Žák, Ladislav (referee) ; Řiháček, Jan (advisor)
The following thesis deals with the design of oil bath production by deep drawing of sheet metal. In the first part the thesis is focused on acquaintance and analysis of the proposed part. The thesis also deals with the issue of deep drawing of metal sheet. In the practical part of thesis is the design of production technology, technological calculations, the design of the drawing tool and the selection of suitable machine. The last part of the thesis is devoted to numerical simulations to verify the manufacturability of the part.
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