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Production of weapon conclusion
Diviš, Adam ; Forejt, Milan (referee) ; Lidmila, Zdeněk (advisor)
The thesis deals with the design of technology for production of weapon conclusion by die forging. The weapon conclusion will be made of C45 steel in series of 500 000 pieces per year. Before forging, the base semi-finished product will be treated using cross-wedge rolling technology. Thanks to the chosen production process, the forging will be made as four pieces. A simulation of the forging process was made for the created design. Results of a simulation showed that metal did not fill entire hollow. Based on these results was made changes in design and the simulation was performed again. According to the results of the second simulation, the hollow has already been filled with metal. For the forging was chosen the machine LZK 2500P from Šmeral a.s with a nominal force 25MN. In the conclusion there was a technical-economic evaluation of costs for the material required for production of entire series.
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Production of components "control element" extrusion
Stříbrný, Jan ; Forejt, Milan (referee) ; Lidmila, Zdeněk (advisor)
The project elaborated in frame of engineering studies branch Engineering technology submitted technology design of manufacturing a control element by extrusion – part of aluminium alloy EN AW 6082. On the base of literature study of the cold forming problems and calculations was designed procedure on one operation. Semi-finished product was chosen cut block rods with a diameter of 43.5 mm and length of 17,4 mm. The production is designed for toggle stamping press LLR 400 (producer Šmeral Brno a.s.) with a nominal force 4000 kN. Extrusion punch and extrusion die are made of steel alloy 19 830.4 heat-worked according to drawing documentation.
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Sizing of the waves geometrical parameters fabricated on the sheet metal die
Stupárek, Daniel ; Forejt, Milan (referee) ; Samek, Radko (advisor)
This thesis approaches the problem of the return of the original geometric shape of the wave which is created on die panels. Die is used as a structural feature of the fiber-cement roofing material in its shipment in the production line. Based on the study of the theory of cold formed sheet metal determine the actual status in the plant. The method of calibration was designed from the collected informations about the original manufacturer of sheet metal panels. Under this proposal and calculation of the required forming power for the recalibration wave in the factory device for the die calibration was designed and constructed. Equipment calibration was performed on two types of corrugated panels and the result fulfilled the theoretical assumptions. In conclusion is processed technological-economic evaluation and the accompanying drawings.
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Bulk forming technology of piston of disk brake
Toman, Svatopluk ; Samek, Radko (referee) ; Forejt, Milan (advisor)
The project of Master’s thesis elaborated within engineering studies of branch 23-03-T002 proposes a technology of production of disk brake piston made of low-carbon steel EN C10E. Supposed production amount is 300 000 pieces per year. With knowledge of literary study on the theme of cold steel bulk forming, three variants of production technique were proposed. The chosen one, for which the technological and energy computations were accomplished, consists of two basic forming operations. For manufacture realization was selected three-stage automatic forming machine TPD 630 (manufacturer Šmeral Brno) with nominal forming output of 6 300 kN. As a material of extruding punch, tool-steel EN X100CrMoV5-1was chosen. For extruding dies was selected high speed steel HS 6-5-2 and its shrink ring is made of high quality steel 60WCrV8. Optimalization of tool properties was performed with specialized PC software.
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Metal forming production of bush by cold extrusion.
Šimeček, Tomáš ; Šlais, Miroslav (referee) ; Forejt, Milan (advisor)
ŠIMEČEK Tomáš: Metal forming production of bush by cold extrusion. The project elaborated in frame of bachelor study degree brings a proposal of step by step metal forming production of bush by cold extrusion. Workpiece is made of normalized circle-shaped bar using 12 050 steel. The step by step production is based on literary pursuit of volumetric forming and calculation and is designed into five steps containing cutting, pressing and extrusion. These operations will be done on multistage pressing automatic machine TPZK 25 manufactured by ŠMERAL Brno, plc. with nominal pressing force of 5MN. Semi-finished product is placed into tooling´s workspace with manipulator. Final part extraction is solved with ejector integrated in automatic machine. Tools are made of tool steel, extrusion punch is designed of 19 550.4 steel, extrusion die is designed of 19 436.4 steel and extrusion die´s band is designed of 19 733.4 steel. Tools are designed to be improved by hardening and drawing.
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Method of measurement parameters in metal forming.
Knebl, Martin ; Šlais, Miroslav (referee) ; Forejt, Milan (advisor)
This master’s thesis deals with the problem of measurement for thermomechanical parameters during metal forming under higher deformation rate. The first part works up general literary studies, comprising a summary of measurement methods for required parameters. There is described a principle of their function and usage. Further assessed the current situation and recommendation of appropriate methods for the dynamic processes of forming, especially their testing. The second part is devoted to the measurement for dynamic features of the material. This is a problem specified by Split Hopkinson preassure bar test. The test is described, including the mathematical evaluation process, in the theoretical part. In the practical part, there is a detailed description of the process and evaluation of the real test with aluminum alloy AlMg4, 5Mn ,07-EN AW 5083 performed within the framework of the junior project.
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Dynamic models of material in metal forming
Kudláčová, Barbora ; Šlais, Miroslav (referee) ; Forejt, Milan (advisor)
The aim of the Diploma Thesis is to discuss the creation of material models for the forming technology in quasi-static and dynamic loading conditions and to practically propose a methodology of modeling the mechanical behavior of the selected material for dynamic load conditions using the Split Hopkinson Tensile Bar Test. The presented work contains an overview and analysis of individual experimental methods with the influence of the strain rate in terms of the extent of their suitability, the analysis of the plastic deformation mechanism, an overview of the mathematical mechanical behavior models for the materials used for technological practice and the evaluation of the mechanical behavior of stainless steel according to ČSN 41 7348 in terms of flat formability incl. evaluation of microstructure, fractographic analysis and evaluation of results from ferromagnetism measurement of steel after dynamic loading.
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Bulk forming technology of pin connector
Kříbala, Milan ; Šlais, Miroslav (referee) ; Forejt, Milan (advisor)
The Bachelor’s thesis deals with the production of the coupling pin cold bulk forming with focus heading and extrusion. The part will be made of structural steel 11 320 5R. The size of the production is about 700 000 piece per year. The two processes was chosen for four forming operation. From the technological calculations were set forming by force 465 kN needed to select a suitable forming machine. Automatic machine TPM 8-A was elected due to force 1000 kN. The drawing documentation is part of the work. Extrusion tools are made of tool steel 19 830. One piece costs 0,6 Czech crowns – this calculation was in the technical-economic assessment.
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Bulk forming technology of cases
Covrighin, Sergiu ; Šlais, Miroslav (referee) ; Forejt, Milan (advisor)
Bc. COVRIGHIN Sergiu. Bulk forming technology of cases. Diploma thesis in fifth class of master studies, academic year 2009/2010, study group 5M/68, FME UT in Brno, Institute of Manufacturing Technology, Department of Metal Forming, May 2010, pages 46 , 18 fig., 7 tab., 4 annexes. In diploma thesis is introduced a technological proposal regarding production of cases by bulk forming from cemented steel 14 220.3. Despite the estimated number of parts which is 70000 a year, quality and product accuracy, 2 options of technological procedures concerning cold bulk forming wth combination of backward and forward extrusion are being considered. For chosen option are elaborated technological calculations. As for the suggested technology, crank press, force 8000 kN and made by company KRUPP was chosen. Material for extruder is steel 19 569 and material for extrusion die is steel 19 655.
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Equipment for pressing the cataract into the injection pump housing.
Trutna, Pavel ; Šlais, Miroslav (referee) ; Forejt, Milan (advisor)
The goal of this work was the engineering of a new machine for pressing the cataract into the injection pump VP30 housing. Based on criteria from the point of view of ergonomics, assembly, shape of the housing and costs, the machine has been engineered so as to clamp the pump housing and press the cataract into the appropriate housing channel. Machine designing has been performed using 3D CAD software which is able to provide drawings and 3D data.
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