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1.
A model of simulation environment for prediction and optimisation of production processes
Igor Drstvenšek, Mirko Ficko, Ivo Pahole, Jože Balič, 2004, original scientific article

Abstract: Paper describes means and methods for computer based optimisation of production processes using a new approach based on technological database (TDB) with genetic algorithm incorporated into a database management system (DBMS). The TDB serves as a store of tools and machine tools from which they can be assigned to different work operations. Work operations are basic entities of orders placed into queues. The goal of the model is to find available resources from the TDB in order to empty the queue in shortest time with lowest costs. To this purpose the model consist the technological database whose DBMS includes a genetic algorithm based optimiser. It checks the orders queue and searches for appropriate combinations of tools and machine tools from the TDB, which can be combined into needed work operations. It also performs an optimisation of time and costs according to so called static parameters of tools and machine tools.
Keywords: production processes, simulation, process planning, technological databases, genetic algorithms
Published: 01.06.2012; Views: 1060; Downloads: 60
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2.
Process integration of a steam turbine
Andreja Goršek, Peter Glavič, 2003, original scientific article

Abstract: Cogeneration consists of combined production of electricity and heat using only one fuel which allows remarkable energy savings in comparison with a system producing electricity and heat separately. The possibilities for integrating a cogeneration system with chemical processes has been studied in this paper. Improvement in the systems where high temperature streams exist can be achieved by direct integration of steam turbine with them. Hot reactor utility was used instead of fuel to produce electricity and steam for further process heat requirements. A thermodinamics oriented approach to identify and preliminary design a cogeneration plant that completely satisfies process heat and power demand is highlighted. Pinch analysis with extended grand composite curve enables rational choice of utilities. The acrylic acid process was used to illustrate the procedure proposed. Economic attractiveness based on payback time and net present worth indicated that the steam turbine based cogeneration system would yield return period of less than 3 months, showing that the investment in cogeneration could be of interest for this plant.
Keywords: process energetics, efficient energy use, process industry, cogeneration systems, acrylic acid, technological processes
Published: 01.06.2012; Views: 1028; Downloads: 59
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3.
Design and construction of the technological process of product production
Marko Drempetić, 2016, master's thesis

Abstract: Master’s thesis contains technological procedure for developing product which includes design, making of technological documentation, choosing parameters for CNC machining, and measuring of the final product. The product from this master thesis is “Oil control block”. This is one of the parts of the high voltage switchgear GIS „Gas Insulated Switchgear“ which is used for regulation of pressure during switching. The product is made from material C45 (1.0503) according to European norm EN 10277-2-2008. The technological process is shown in spreadsheet view. Also it’s explained the workholding device and the way of using it, then it’s shown the technological documentation which follows the machining process, then the NC program and 3D model. It will be shown the CNC milling machine "Matsuura H.Plus-630 Horizontal Machining Center" and the parameters for machining process. After machining process is done the workpiece is sent to the Quality Control Department where it is checked GD&T. Dimension are controlled on 3D coordinate measurement system “FARO” then the control list is generated with the appropriate software.
Keywords: technological process, workpiece, milling process, G and M code, 3D Laser scanner
Published: 04.04.2016; Views: 634; Downloads: 60
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