Studentski poduzetničko-tehnološki inkubator u Bjelovaru

According to the Statute of the Technical College in Bjelovar [1], one of the institution’s activities is to promote new technologies, innovations and entrepreneurship. With the aim to foster development of entrepreneurial skills and innovativeness of students, Technical College in Bjelovar has founded the Student Entrepreneurial-technological Incubator Bjelovar (hereinafter: student incubator).Prema Statutu Visoke tehničke škole u Bjelovaru [1], jedna od djelatnosti ustanove je promicanje novih tehnologija, inovacija i poduzetništva. S ciljem poticanja razvoja poduzetničkih vještina i inovativnosti studenata, Visoka tehnička škola u Bjelovaru osnovala je Studentski poduzetničko-tehnološki inkubator Bjelovar (u nastavku: Studentski inkubator)

Possibilities of using CAD tools in the case of the company Iveta Ltd. windows and doors

U radu se prikazuje mogućnost modernizacije proizvodnje u tvrtki koja se bavi proizvodnjom prozora i vrata. Uvođenjem CAD alata zaokružuje se cijeli ciklus nastajanja novog proizvoda. Prikazane su aktivnosti koje svojom provedbom pomažu ubrzati proces pripreme tehničke dokumentacije potrebne za proizvodnju. Kako je prvi dojam bitan kod odabira proizvoda u daljnjem tekstu prikazana je izrada visoko rezolucijskih slika.This paper presents a way of modernization of production in the company Iveta Ltd. windows and doors. The introduction of CAD tools rounds off the whole cycle of the formation of a new product. The activities whose implementation helps speed up the process of preparing technical documentation needed for production are presented. Since the first impression is important when selecting products, the production of high-resolution images will be displayed

Reconstruction and development of 3D model for biaxial conventional lathes Hobbymat MD65

Prikazan je postupak rekonstrukcije konvencionalne tokarilice Hobbymat MD65 u CNC (Computer Numerical Control) stroj s dvije simultane osi ugradnjom koračnih motora tipa NEMA 23 i upravljanih PC programskim sustavom Mach3-Lathe. 3D model je izrađen u programskom alatu Solid Edge ST4 – Ordered Technology, a fotorealistički prikaz modela u programskom modulu ERA (ExplodeRenderAnimate). Na temelju dokumentacije o montaži i održavanju i mjernih skica izrađena je kompletna 2D tehnička dokumentacija stroja. U programskom alatu AutoCAD Mechanical i programskim modulima Shaft Generator i Shaft Calculation izrađen je kontrolni proračun naprezanja vratila stezne glave, a analiza naprezanja- FEA u programskom modulu Femap – Solver NX Nastran.A process of reconstruction for conventional lathes Hobbymat MD65 in CNC (Computer Numerical Control) machine with two simultaneous axes installing stepper motor type NEMA 23 and managed PC programming tool Mach3-Lathe is presented in this paper. A 3D model is created in the programming tool Solid Edge ST4 – Ordered Technology, and realistically display models is created in the programming module ERA (ExplodeRenderAnimate). Complete 2D technical documentation of the machine was made based on the documentation on the installation and maintenance of measuring and drawing. The software tool AutoCAD Mechanical and program modules Shaft Generator and Shaft Calculation are used for controlling stress calculation returned chucks and FEA stress analysis in software module Femap – Solver NX Nastran

CAD/CAM system customizing for 2.5D and 3D milling on Haas VF6 4-axis CNC milling machine

U ovom radu opisana je problematika konstruiranja složenog kalupa, pomoću programskog alata SolidWorks. Za konstruiranje kalupa korišteni su programski moduli Surface i Mold, pomoću kojih se izradio zahtjevni 3D model žlice (programski modul Surface), te s obzirom na nju konstruirani su matrica i žig (programski modul Mold). Nakon 3D modeliranja kalupa, izrađena je simulacija 3D obrade glodanja u programskom modulu SolidCAM, gdje je nakon definiranja obrade generiran G-kod za stroj Haas VF-6 na kojemu je sam kalup i izrađen.In this thesis we work on modelling a complex mold, with the help of SolidWorks software. For constructing this mold, moduls of Surface and Mold were used for making the spoon (Surface) and then, based on the spoon, mark and countermark (Mold) where made. After modelling a mold in 3D, 3D milling simulation was made in the SolidCAM module, where a G-code of milling for the Haas VF-6 was generated and a mold was made

CAD/CAM system customizing for 2.5D and 3D milling on Haas VF6 4-axis CNC milling machine

U ovom radu opisana je problematika konstruiranja složenog kalupa, pomoću programskog alata SolidWorks. Za konstruiranje kalupa korišteni su programski moduli Surface i Mold, pomoću kojih se izradio zahtjevni 3D model žlice (programski modul Surface) te s obzirom na nju konstruirani su matrica i žig (programski modul Mold). Nakon 3D modeliranja kalupa, izrađena je simulacija 3D obrade glodanja u programskom modulu SolidCAM, gdje je nakon definiranja obrade generiran G-kod za stroj Haas VF-6 na kojemu je sam kalup i izrađen.In this thesis we work on modeling an complex mold, with a help of software SolidWorks. For constructing this mold, moduls of Surface and Mold were used, for making of spoon (Surface), and then based on spoon it was made mark and countermark (Mold). After 3D modeling of a mold, it was made 3D milling simulation in modul of SolidCAM, where was generated G-code of milling for a machine Haas VF-6, where a mold was made

The approach to stability determination of single axis positioning regulation for the model of TTT manipulator

Razni modeli manipulatora često se koriste u industrijskim pogonima i tehnologijama. Prikazana je mogućnost uporabe i usporedbe novih metoda upravljanja aktuatorima. Za izvedeni TTT manipulator neophodno je utvrditi standardne kataloške podatke. Glavna karakteristika pri upotrebi ovakvih manipulatora je njihov stabilan odziv u regulaciji pozicioniranja. Pokusno mjerenje provodi se s različitim mehaničkim opterećenjima, uglavnom koncentriranih u okolini standardnog mehaničkog opterećenja korištenog za simulaciju modela industrijskih pogona. Prikazani su rezultati provedenog eksperimenta najveće dostupne stabilne brzine koračnog motora za najopterećeniju os modela TTT manipulatora. Određivanje stabilnosti provedeno je do dvostrukog standardnog mehaničkog opterećenja. Najveću utvrđenu stabilnu brzinu motora moguće je koristiti za sve ostale osi bez utjecaja na stabilnost obzirom da je eksperiment proveden za mehanički naojopterećeniju os.The various models of manipulators are commonly used in industry plants and technologies. Possibility of applying and comparing such new methods is presented for actuator control. For produced TTT (Translation-Translation-Translation) manipulator it is necessary to determine standard catalogue information. The main issue in usage of such manipulators is stabile positioning regulation. The test survey is conducted with various mechanical loads, mainly concentrated in close surrounding of standard mechanical load used for simulations of industry models. Results of the highest available stabile speed of stepper motor are presented for the worst axis case of the model of TTT manipulator. The stability determination is conducted up to double standard mechanical load. The result of highest stabile motor speed can be applicable on all other axis with no influence on stability, since experiment is conducted on most mechanically loaded axis

Analysis of the influence of 3D printing on hardness of parts

Načela aditivne proizvodnje su takva da omogućuju izradu vrlo komplicirane geometrije proizvoda. Krutost printanih dijelova ne raste proporcionalno povećanju ispuna samih dijelova. Načini printanja imaju veći utjecaj na krutost od same ispune. Provedenim ispitivanjima na uzorcima "punog" modela utvrđena je zadovoljavajuća krutost dijelova dobivenih 3D printanjem uz manje utrošenog materijala i kraće vrijeme izrade pravilnim izborom parametara i načina printanja.The principles of additive production are such that they enable the making of very complex product geometry. The hardness of printed parts is not increased proportionally to the increase of the infill of the parts themselves. Different ways of printing have a bigger impact on the hardness than the infill. The research conducted on the "solid" model samples established sufficient hardness of parts gained from 3D printing with less material use and shorter time of production due to correct selection of parameters and the way of printing