| Abstract | Vitka-proizvodnja, kao model organizacije primjenjena je u raznim industrijama, a potječe iz Japana. Prvotno se primjenjivala u automobilskoj industriji (korporacija Toyota). Toyotin proizvodni sustav je razvijen nakon drugog svjetskog rata, što je rezultiralo proizvodnim sustavom koji eliminira veću količinu škarta, te s time omogućava djelotvoran tehnološki razvoj.
Unutar tehnološkog koncepta vitke-proizvodnje, otkriveno je da se bolji rezultati ostvaruju sa detaljnijom analizom procesa, koja uključuje sve faze proizvodnje, na temelju čega se razvila metoda analize projektiranje za proizvodnju.
U ovome radu, navedena metoda analize korištena je na primjeru trupa broda, tipičnog teretnog prostora i tunela broda za rasute terete. Ukupna elektro oprema je svrstana i klasificirana u tablicu prema količini, oznakama, vrsti, masi i broju sati rada potrebnih za montažu pojedine opreme.
Kao rezultat analize dobiven je manji broj radnih sati za montažu kabelskih staza, tako da se umjesto montaže na brodu, integriraju tijekom proizvodnje sekcija u predmontaži.
Osim opreme teretnog prostora i tunela, glavnu opremu čini pomična traka na temelju koje je izrađena simulacija izmjenjivača promjenjive frekvencije, pomoću čega se upravlja brzinom asinkronog stroja koji pogoni pomičnu traku promjenjive brzine.
Na temelju rezultata simulacije prikazan je utjecaj izmjenjivača na asinkroni stroj, te načelo djelovanja izmjenjivača općenito.
Dodatno je provedena optimizacija izrade broda pomoću FORAN programa, generiranjem jednostavnije verzije 3D modela broda, kako bi pomoću proračuna snage propulzije tog broda, dobili uvid u potrebnu snagu izmjenjivača odnosno kao prijedlog zamjene dizel-mehaničke propulzije sa električnom propulzijom. |
| Abstract (english) | Lean-manufacturing, as an organization model is applied in different industries, and it originates from Japan, particularly the automotive industry, particularly the Toyota corporation. The Toyota production system was developed after the Second World War, which resulted in a production system that eliminated many wastes, thereby enabling a very efficient technological development.
Inside of lean-manufacturing, it appeared that better results come with detailed analysis of processes, which includes all phases of production. Design for production lends itself well into the lean manufacturing principles.
In this work, the stated method of analysis is used on an example of a ships block, a typical cargo hold and tunnel of bulk carrier ship. The entire electical equipment is listed and classified in a table according to quantity, label, type, weight, and by work hours needed for installation of each equipment.
As a result of this analysis, it is given less work hours for installation of cable tracks, in a way that instead of conducting an installation on the ship, it is done by integrating cable tracks in a pre-assembly of a section.
Besides the equipment of the cargo hold and tunnel, the main equipment is the conveyor, based on which the simulation of a variable frequency drive is generated, where it is possible to control the speed of an asynchronous machine that drives the conveyor.
Based on results of a simulation, it is shown how a variable frequency drive influences asynchronous machine, also it is analysed a working principle of an inverter in general.
Also, an optimisation in building a ship is performed using FORAN software, whereby a simple version of a 3D ship model, by which calculation of ship propulsion is made so that it gives an insight of what power inverter to use, as a proposal of switching from diesel-mechanic propulsion to an electrical propulsion system. |
