National Repository of Grey Literature 207 records found  1 - 10nextend  jump to record: Search took 0.00 seconds. 
Precision forging
Berka, Martin ; Peterková, Eva (referee) ; Lidmila, Zdeněk (advisor)
This bachelor´s thesis deals with the technology of precision forging. The thesis describes basic distribution of the forging according to the nature of the material flow and his procedure. After the introductory part this thesis deals with the analysis of the methods of the drop forging with fin groove. The next section contains a description, parameters and methods of precision forging. Technical a economical evaluation of the component technology is as a conclusion of the thesis.
The Antenna Bracket Manufacturing by a Compound Tool
Lipka, Ondřej ; Lidmila, Zdeněk (referee) ; Peterková, Eva (advisor)
This master’s thesis focuses on the concept of large-lot manufacturing of sheet metal component made from DC01 steel. Based on forethought, the method of compound tool combining shearing and bending was chosen. The theoretical part analyses used technologies in detail. In the next part specific course of manufacture was created and supplied with technological calculations. Based on all needed facts the tool was designed and after that forming machine, LDC 160 crank press, was chosen. At the end the usability of designed concept was confirmed with economical calculations.
Increasing the life of blanking punch by coating
Šplíchal, Jan ; Lidmila, Zdeněk (referee) ; Podaný, Kamil (advisor)
This Bachelor thesis presents possible methods for increasing the lifespan of cutting tools made of steel 19 436 designed for cutting stator and rotor plates made of silicon steel. These sheets are characterized by high hardness, which adversely affects the edges of the scissors. Experimental hardness measurement on delivered samples has verified the actual heat treatment on the surface and inside the scraper. The measured value 62 HRC corresponds to the input requirements. Based on the literature study, a combination of chemical – heat treatment and coating was chosen as the most appropriate method. In order to preserve the microstructure of the punch produced after the heat treatment, it was necessary to apply the coating by physical vapor deposition, which is characterized by low deposition temperatures. The FeinAl coating will be applied by cathodic arc deposition and is primarily designed to protect tools and cutting tools.
Heat treatment of formed parts
Poloch, Milan ; Peterková, Eva (referee) ; Lidmila, Zdeněk (advisor)
Bachelor thesis focusing on heat treatment of formed parts. The chapter of basic termsdeals with steels for forming. Concrete formability and influence on plastic deformationson steel properties, influence of chemical composition, structural composition and termomechanical conditions during deformation. In the larger parts of the thesis are carriedout heat treatment. The prohibited concepts of heat treatment are explained in the in-troductory question and some follow the basic methods and then the basic methods ofheat treatment such as annealing and tempering with tempering are explained. All ofthese technologies have their own subchapters and are illustrated and supplemented withgraphs and figures. The practical amount consists of plastic deformations of roller-shaped samples. The samples were deformed, measured hardness, heat treatment followed bymeasured hardness. Changes of mechanical properties on samples are evaluated.
Verification of the properties crimp joint
Horák, Ondřej ; Hruška, Ondřej (referee) ; Lidmila, Zdeněk (advisor)
The bachelor thesis deals with the description of mechanically unbreakable conections, called crimp connection. The most often used materials are copper, brass and bronze. The crimp connections are divided into joints with an open tube, closed tube and crimp isolation. The joint is formed by bending of the parties of the crimp, where a consequent plastic deformation results in a mechanically non-detachable joint. The post production control of the crimp consists of visual inspection, measure of the crimp height, supplementary tearing test and cutting the crimp. No visual defect in testing two types of crimp connections was detected. The measured crimp height corresponds to the values specified by the manufacturer. During the tear test, the desired values were not achieved by incorrectly attaching the wire to the clamping mechanism and no manufacturing defects were detected at the final check of the cut.
Gear production design
Rusková, Marie ; Lidmila, Zdeněk (referee) ; Podaný, Kamil (advisor)
The thesis deals with the design of a gear, which is located on the rear half-axle of the tractor. Due to the high torque transmission, it will be made of 12 061 steel. After assessing the various production technologies, the forging on the vertical crank press were chosen as the most optimal. Forging was designed according to the standard ČSN 42 9030. The semi-finished product is going to be a rod with a diameter of 125 mm, which will be divided by cutting to a length of 219 mm. Forging will take place in three operations. Based on the highest calculated required force, which came out to 63.16 MN, the LZK 6500 machine was chosen. An LDO 315 A/S trimming press will be used to remove the protrusion and membrane.
Production of the Folding meter lock
Václavek, Petr ; Lidmila, Zdeněk (referee) ; Žák, Ladislav (advisor)
The thesis proposes a concept of manufacturing the folding meter lock. The part is made from DC01+LC steel of 0,3 mm thickness. The series size is 100 000 pcs/year. A forming in a progressive combination tool combining shearing, bending and stamping was chosen for the production, based on the analysis of possible solutions. The tool, designed on the basis of literary research of used technologies, produces the part in eleven steps exerting maximal force of 38,5 kN. The production will take place on an eccentric press LEN 40 C. The market price of 3,38 Kč for one piece was established by the technical and economic evaluation.
Producing of artillery shell
Moravec, Zdeněk ; Forejt, Milan (referee) ; Lidmila, Zdeněk (advisor)
The diploma thesis deals with the technology of production of the body of an artillery shell caliber 155 mm from C60 steel. The part is manufactured in series of 100,000 pieces. Based on a literature study and materials, a technological procedure of drop forging was designed, taking into account the specific shape of the forging. The volume of the starting blank and the forming force were determined. A suitable forming machine was selected based on the magnitude of the forming force. The design of tools for punching operations and reduction diameters of sets of rollers for forging stretching was also performed. In the technical and economic evaluation, the material costs for the production of the entire series were quantified.
The manufacturing of component from wire
Pecinová, Hana Elisabetha ; Lidmila, Zdeněk (referee) ; Peterková, Eva (advisor)
Project elaborate within bachelor's degree, present design production of components called "fan". Component is made from rod diameter 4 mm, of material ČSN 41 1343. Based on the literature study of issues bending and roll bending were performed some of calulations and for others was developed sugestion. Further was designed hand-operated machine for forming- bending and roll bending. For this hand-operated machine was drawn tracing documentation of completation and selected parts. Machine is primaly designed for solved component, but it can be used universally for stock part of small dimensions. In the end was carried out economic balance for production of machine and component.
Production sprocket
Diviš, Adam ; Štroner, Marek (referee) ; Lidmila, Zdeněk (advisor)
The project elaborated design of technology production of the sprocket using die forging from steel C45. Pursuant to of the literary pursuit a problem of the die forging and calculation was designed manufacturing process for three operations. Dimensions of forging and tool are designed according to appropriate standards. Forging will be done on forging press LZK 1000 P/SH, with nominal tensile force 10 MN. Dies will be made from instrumental steel 19 662 heat-worked according to drawing documentation.

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