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Simulated verification of complex technology project
Varjan, Matúš ; Hrubý, Jiří (referee) ; Lenort,, Radim (referee) ; Rumíšek, Pavel (advisor)
In the introduction, doctoral thesis as a complex technological project uses the summary title Stability of production. Stability of production is defined as a maintaining the required properties of the system over a given time period. Stability of production, based on the literature study included: – generally known systems and concepts, for example Process Stability, System Stability, Toyota Production System, Lean Manufacturing, etc. – less-known systems and concepts, for example Maintaining the fidelity of the production program, Stable order-sequence concept. The practical part of the doctoral thesis is focused on the less-known concept: Stable order-sequence. The task of the Stable order-sequence is to follow the sequence of orders given by the planned production program in the course of the production and at the end of production. Maintaining the sequence of the orders has a positive experience in the logistics activities between the final producer and its suppliers. As it was found by the planned experiment for a full factory plan, the sequence of orders in the material flow of original equipment manufacturer is influenced mainly by: – the cause of the removing orders from material flow, – the effect of the causes LIFO stack vs. branched material flow, – the effect of the causes LIFO stack vs. branched material flow vs. the removing from the material flow. By the analysis of Stable order-sequence, it was found that the methodology of the concept contains deficiencies. It does not state how to choose for example the size of the time period, time interval, data editing etc. By this lack, the subject can skew the results in the evaluation of the indicator PFT0 up to 4 %. Or by using of suitable adjustment, the value of the indicator PFT0 can be improved more than 50 %. To test the concept of a Stable order-sequence in practice has been designed technological project with the support of discrete-event simulation. It was about the implementation of new management logic to the stack behind the welding of original equipment manufacturer. The new logic of management was designed with an emphasis on Stable order-sequence concept, to arrange the orders in process according to the planned sequence. On the base of the functionality verification of the new stack logic, it was found that the logic affects the sequence of the orders, but not fundamentally. In tracking the hourly intervals for 25th calendar week 2013, the value of PFT0 was not improved in 37 cases, the value remains in 30 cases and the value was improved by the value of the median 18,68 % in 30 cases orders.
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Production of connector
Kočka, Jiří ; Rumíšek, Pavel (referee) ; Žák, Ladislav (advisor)
The diploma thesis deal with the proposal of connector manufacturing from bronze sheet CuSn6, thickness 1.5mm in production volume of 1.600.000 parts per year. From considered manufacturing variants there was chosen shearing and forming technology of thread in the progressive stamping die. For part production was selected pressing machine Bruderer 1250 with nominal pressing force 1250 kN from company E. Bruderer Maschinenfabrik AG. In the economical evaluation there were determined expenses 21.6 Kč per one piece including demanded profit. The turning point was calculated at production of 165.522 parts.
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Production single parts "Ring" from sheet metal
Stejskal, Luboš ; Rumíšek, Pavel (referee) ; Žák, Ladislav (advisor)
This thesis elaborated within a master degree in 23-03-T002 line, introduces a suggestion of production technology of part „Ring“ by sheet metal forming out of deep-drawing steel W.Nr. 1.0338. Supposed production amount is 250 000 pieces per year. Based on a literary study of problematic of sheet forming for this required part regarding production series, technologies of this of deep drawing and cutting were chosen. According to performed technological calculations, a production process of seven operations was designed. A sequence automatic machine Paust 40 (VVB WMW), was cousin for this suggested process. This machine is particularly appointed for big series and wholesale production of impressions of sheet metal. It is equipped with mechanization and therefore creates a fully automatic line. A tool was designed for this chosen type of machine. Project includes economical evaluations of elaborated of production technology.
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New testing method on production line
Zuhla, Michal ; Horák, Jaroslav (referee) ; Rumíšek, Pavel (advisor)
This Diploma thesis is aimed at testing centre at the assembly line for boarding steps and ramps for rail vehicles. This project describes various activities and issues associated with the testing of these products. The project also evaluates current testing processes and proposes optimal future state and recommends solutions necessary to achieve this. A new design of a testing centre is also developed.
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Rationalization project of air-filters production
Buďa, Vojtěch ; Heinl, Zdeněk (referee) ; Rumíšek, Pavel (advisor)
This thesis deals with rationalization layout of air and fuel filters production in the company MANN-HUMMEL (CZ) s.r.o., which ensures minimization of work in process and design optimal load of production on the basis measured and analyzed times operations of production. Part of thesis is the design layouts of workplace with selection of optimal variation which provides shortening and better overview on flow of material production.
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Technology project for general production of the "PC-box cover"
Křivý, Drahoš ; Horák, Jaroslav (referee) ; Rumíšek, Pavel (advisor)
The project, which was done within the scope of engineering’s study shows the proposal of new technology and production organization of a part “PC cover” – a piece done by deep drawing technology from steel sheet of material 11 321. The study shows some of production operations such as cutting, bending, drawing and shearing, included production method solving. In the project were solved also necessary technological calculations and constructional drafts of forming tool. The whole work covers a complex solution of problems related to production of PC cover together with technological disposition of workplace which represents effective layout, distribution and designing of workplace and machines, used for production of the part in a workshop
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Technology for PC-box side production
Pašalov, Tomáš ; Horák, Jaroslav (referee) ; Rumíšek, Pavel (advisor)
The project developed as a part of continuing master’s program in the field of M-STG Mechanical engineering technologies introduces a technological proposal of producing a side panel of computer case. Based on the research of published studies on the topic of surface forming and methods of production of shape openings in sheet-metal, we chose the variant of production of parts using punch press and press brake and selected appropriate material – steel with protective zinc and aluminum coating. Based on the research of published studies on the topic of computer cases we processed analyses of shape designs and chose optimal variant, for which we prepared calculations of production costs in comparison with other proposals.
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Production of gas valves on the automatic line
Pešl, Milan ; Rumíšek, Pavel (referee) ; Štroner, Marek (advisor)
This thesis deals with the evaluation of manufacturing gas valves on the automatic line and the design of CCTV systems to detect errors at assembly in Honeywell Czech Republic Ltd. The aim of this thesis is mutual comparison of the respective proposed options of the camera system, their optimal selection, and the evaluation of detected errors of the line by using Pareto Charts. An integral part of this work is a brief description of the automatic line for gas valves and the history of Honeywell Company.
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Experimental verification of powdered plastics coating with painting shop layout
Dokoupilová, Dita ; Dvořák, Miloslav (referee) ; Rumíšek, Pavel (advisor)
This thesis deals with an experimental verification of powdered plastics coating on a component with a painting shop layout. Part of this thesis is looking for the best kind of a paint which meets the wishes from the company such as specific dielectric strength or cladding thickness. The selective variation is drown up into the technological project. At the end of the thesis there is a technical-economical evaluation of the project, focusing mainly on the efficiency of the investment in new mechanical equipment and on the economic return.
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Optimization in conveyer rollers production
Veverka, Štěpán ; Heinl, Zdeněk (referee) ; Rumíšek, Pavel (advisor)
Presented document deals with optimization in conveyer rollers production in accordance with rationalizing project for Transroll – CZ, s.r.o. company. With consideration of available literature from section of technological projection and technology of machining, the industrial process is analyzed with focus on material flow and layout solution of factory shop. Consecutively the options of possible machines allocation are designed, which eliminate some disadvantages of default position. Selection of suitable option, its evaluation and technical-economic evaluation of whole project are also parts in this document.
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