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Study of the deformation of the circular holes in relation to their spacing from the bend in the two-point bending of the sheet on the bend press
Piterka, Miloslav ; Řiháček, Jan (referee) ; Mrňa, Libor (advisor)
The thesis is focused on studying deformation of the circular holes in the limit bending space, depending on the material type, distance from bend, the thickness of material and diameter of hole. After analyzing all necessary technological parameters was bending technology on press brake selected. An experiment for which the tools and press brake Trumpf TruBend 5170 were selected was designed and performed. Samples for the study were designed, bent and measured. The charts have been prepared for practical use in the company from measuring. In addition, simulations were processed in Ansys program and graphs were compiled to compare the main effect of the hole deformations. Two methods were chosen to prevent deformation in limit bending space. Under-cutting method by laser and method of using special Rollbend tool. In the end, economic studies for the Rollbend tool were developed instead of under-cutting hole with grinding.
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Waste Elimination on Press Brakes
Kubový, Tadeáš ; Pavlíková, Eva (referee) ; Videcká, Zdeňka (advisor)
This diploma thesis deals with a proposal for the elimination of losses on press brakes and the overall improvement and optimization of the press brake process. The design part of the work contains two proposals, both with the aim of eliminating losses and increasing the performance of the press break workshop. The work is divided into six main parts from the theoretical starting points, through the analysis of the entire production process, detailed analysis of the bending process, to the design of the solution and its evaluation.
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Design of forming tool production technology using the additive method of 3D printing
Obadal, Jan ; Vašíř, Jakub (referee) ; Sedlák, Josef (advisor)
This bachelor thesis deals with a plan of a forming device manufacturing technology utilising additive methods of 3D printing. The theoretical part of this thesis deals with the characteristics of sheet metal forming technology and the characteristics of additive technology. The practical part of this thesis contains a breakdown of the current state and it deals with usage of the current forming tool. In terms of the practical part, there is an innovation draft whose goals it to speed up the manufacture of a particular pressed piece. The principle of this innovation is the utilisation of a single-purpose machine which is optained through the additive method of 3D printing. The optimal combination of printing parameters and tool geometry are found through prototype testing. To keep the product measurements accurate requires modified proportiong of the semi-finished product. The final tool is capable of bending two pressed pieces at the same time. During the process of bending, it is necessary to review the measurements of every 25th pressed piece and to revise the position of a bottom dead center. The lifetime of this innovative tool is set to 600 pieces. Technological and economical evaluation shows return of invesments and reduced time due to the application of this innovation, thanks to which the bending time is reduced by 50 %.
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Design of hydraulic press brake
Machara, Matúš ; Tůma, Zdeněk (referee) ; Pavlík, Jan (advisor)
The thesis is focused in the first part on the issue of bending and various types of press brakes In the second part, a mechanism was designed in detail to control the ram press brake during bending. The individual situations that may occur at work have been developed. Based on them and on the theoretical consideration of the deformation of individual parts of the invented solution, the individual components were dimensioned. A possible solution of the basic construction of the whole press brake according to the assignment parameters was also outlined. Finally, a recommendation for the production of this solution was mentioned.
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Production Possibilities of Press Brakes
Hrazdíra, Michal ; Jopek, Miroslav (referee) ; Řiháček, Jan (advisor)
The bachelor thesis deals with the production possibilities of press brakes. This is a literary research, in which the aim of the work is to describe the principle of bending. It also focuses on common and special tools and their use in engineering practice. The first part of the work is focused on general bending technology, which discusses the basic principles and possibilities of this method. The main chapter is the bending itself, where the individual types of machines, their components, tools and clamping systems are introduced and described. Furthermore, modern tools and their application in engineering practice are presented. In the last part, the production of the switchboard cabinet is presented on a CNC press brake.
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Design of Tool for Louvers Production
Hejna, Jaroslav ; Žák, Ladislav (referee) ; Řiháček, Jan (advisor)
This thesis presents a tool design for production of embossments into the bottom part of the agricultural silo made of Dx51D material. The research analysis all technologies used for embossing, that is cutting and shallow drawing. This is followed by a chapter on simulation. The tool design itself is described. Its principle is based on tools for punching machines. The upper half of the tool is composed of a weldment to be clamped into pressing machine, into which are mounted functional parts in the form of inserts. The lower tool consists of several bolted plates, punches and a holding plate, which is located on the springs. In order to achieve correct design, necessary calculations were carried out and it was all confirmed by simulation in ANSYS. The two tool halfs are guided by pins attached at the edges of the lower tool. The technical - economical evaluation compares the work of the proposed tool with other possibilities of embossing.
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CNC Applications in Forming Processes
Pobořil, Martin ; Jopek, Miroslav (referee) ; Řiháček, Jan (advisor)
This thesis presents the study on CNC control and its usage in forming processes. It analyses the main elements which are essential for functionality of computed numerically controlled processes. It also comprises the basics of CNC programming and related software programmes. Individual technologies of forming are covered in terms of fundamental principles. Subsequently the technologies are described in relation to the CNC control – in theory and also the specific examples of machines and software programmes are given. The thesis considers advantages and disadvantages of each technology and its suitability for use in given application.
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Study of the deformation of the circular holes in relation to their spacing from the bend in the two-point bending of the sheet on the bend press
Piterka, Miloslav ; Řiháček, Jan (referee) ; Mrňa, Libor (advisor)
The thesis is focused on studying deformation of the circular holes in the limit bending space, depending on the material type, distance from bend, the thickness of material and diameter of hole. After analyzing all necessary technological parameters was bending technology on press brake selected. An experiment for which the tools and press brake Trumpf TruBend 5170 were selected was designed and performed. Samples for the study were designed, bent and measured. The charts have been prepared for practical use in the company from measuring. In addition, simulations were processed in Ansys program and graphs were compiled to compare the main effect of the hole deformations. Two methods were chosen to prevent deformation in limit bending space. Under-cutting method by laser and method of using special Rollbend tool. In the end, economic studies for the Rollbend tool were developed instead of under-cutting hole with grinding.
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Proposal of production technology of trough
Rérych, Pavel ; Staněk, Vojtěch (referee) ; Podaný, Kamil (advisor)
Elaborated thesis presents a proposal of technology for the production of modular. The modular is manufactured by ACO Industries k.s. from stainless steel 17 240 with thickness 1.5 mm. Literary studie is focused on Bending as the most favorable technology with respect to tender documentation. Based on technological calculations and available machinery TruBend 5130 press with nominal force 1 300kN was selected for part manufacturing process. Forming tools are made of Cr - Mo tool steal. The thesis also includes technical and economic evaluations.
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Proposal of parts manufacturing for air industry
Koula, Vojtěch ; Valášek, Petr (advisor) ; Brožek, Milan (referee)
The aim of the thesis is making the design process for the production of parts for the aerospace industry by bending. Forming technology is the perspective of manufacturing technology, what has frequent use in the aerospace industry. Part of this thesis is the experimental finding of maximum possible ram speed on press brake machine during bending of small radius to prevent cracking. Bending was performed on the press brake and possible cracks of the material were check by capillary fluorescence testing. These knowledge were applied in the design process for the manufacturing of parts and there was provided economic evaluation.
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