| | SLO | ENG | Piškotki in zasebnost

Večja pisava | Manjša pisava

Iskanje po katalogu digitalne knjižnice Pomoč

Iskalni niz: išči po
išči po
išči po
išči po
* po starem in bolonjskem študiju


1 - 10 / 10
Na začetekNa prejšnjo stran1Na naslednjo stranNa konec
Layered additive manufacturing in clinical medicine
Igor Drstvenšek, Nataša Ihan Hren, Tadej Strojnik, Vojko Pogačar, Tjaša Zupančič Hartner, Andreja Sinkovič, 2008, izvirni znanstveni članek

Opis: The use of contemporary technologies of Computer Assisted Design (CAD), combined with latest rapid prototyping, tooling and manufacturing, with traditional CT scanning techniques and high medical skills are used as instruments for better diagnostic visualization, simulation of procedures and treatment of patients with craniofacial deformities. They also improve the overall performances of medical and nursing staff thus influencing the quality of medical service. Patients with congenital defects, orthognathic deformities, deformities after malignancy treatment or after craniofacial traumatic injuries of different severities are of particular interests due to both aesthetic and functional alterations. The paper presents two clinical cases - a patient with scull bone defect after brain hemorrhage and brain edema as well as a patient with hemifacial microsomia treated by surgery followed by implantation of titanium angular implant prepared by means of computer tomography scans, Computer Aided Design and Rapid Manufacturing technologies.
Ključne besede: rapid prototyping, computer assisted design, maxilla, scull, reconstructive surgery
Objavljeno: 31.05.2012; Ogledov: 1349; Prenosov: 83
URL Povezava na celotno besedilo

Additive fabrication in metallurgy - case study of grey cast iron valve production
Bogdan Valentan, Igor Drstvenšek, Tomaž Brajlih, Peter Sever, Simon Brezovnik, Jože Balič, 2010, strokovni članek

Opis: Additive Fabrication technologies are well known from the last two decades. In that time Additive Fabrication technologies have evolved from strictly prototype part production into an option that can also be used to produce end-user parts. With development of Additive Fabrication machines capable of producing metal parts, a complete substitution of conventional metal casting technologies is possible. However, direct Additive Fabrication of metal parts is still not time/cost effective when producing large volume parts, and nowadays there is still lack of materials that can be used on those machines. This paper presents a method how a conventional sand casting process can be assisted by Additive Fabrication technologies. A sand mould pattern is produced by Selective Laser Sintering. Additive Fabrication is also used in direct manufacturing of cores.
Ključne besede: gray cast iron, layered technologies, rapid prototyping, rapid manufacturing, sand casting
Objavljeno: 31.05.2012; Ogledov: 1288; Prenosov: 11
URL Povezava na celotno besedilo

3D virtual prototyping of a ski jumpsuit based on a reconstructed body scan model
Zoran Stjepanović, Andreja Rudolf, Simona Jevšnik, Andrej Cupar, Vojko Pogačar, Jelka Geršak, 2011, izvirni znanstveni članek

Opis: 3D virtual prototyping become a topic of increasing interest of both computer graphics and computer-aided design for apparel production. These technologies are especially important when a garment prototype should be developed for a special purpose, such as ski-jumper suit. Namely, shape and size of a jumpsuit need to be individually adapted to each ski-jumper according to the exact requirements set by FIS (Fédereation Internationale de Ski). The FIS requirements change annually or even more often in order to assure ski-jumpers' safety during competitive ski jumps. The conventional body measurement technique and development of ski-jumpers pattern are time consuming. In order to develop an accurate and rapid design, as well as an adaptable and quickly changeable jumpsuit, different modern technologies were used. The obtained virtual prototypes of a skijumper and a jumpsuit enable both - fast re-modelling according to FIS rules and expeditious development and/or simulations of a jumpsuit. All these measures are taken to improve the aerodynamic design of a suit and jumper's result. The body scanning technology represents a great potential for textile industries and above all for producers of garments. It enables fast and reliable capture of 3D body data and extraction of precise measurements needed for design, construction, visualisation and animation of garments on virtual mannequins. However, there are also some problems related to the scanned body models, caused by the scanning technique. In this article we are discussing the techniques for reconstruction of the body models and its results using the example from one of the competitive sports clothing - ski-jumper suit. In our study we have used different computer graphics programmes in order to reconstruct and prepare the 3D body scan model for successfully importing it into OptiTex CAD programme. The aim of this research was to enable effective 3D virtual garment prototyping using the reconstructed body scan model.
Ključne besede: virtual prototyping, ski jumpsuit, 3D body scanner, 3D software packages, Optitex
Objavljeno: 01.06.2012; Ogledov: 1334; Prenosov: 25
URL Povezava na celotno besedilo

Rapid prototyping processes give new possibilities to numerical copying techniques
Ivo Pahole, Igor Drstvenšek, Mirko Ficko, Jože Balič, 2005, izvirni znanstveni članek

Opis: Due to the appearance of numerically controlled machine tools the conventional copying from physical model has almost lost its importance. Instead, the model of numerical copying is widely used. Until recently, geometry could be copied predominantly in the touching manner and the manufacture of copied - measured shapes on CNC machine tools mainly did not pose o problem. However, because of the introduction of optical copying of geometrical data it is possible to copy the shapes which, sometimes, cannot be made by conventional machining processes (small radii of curvature, negative angles, etc.). The paper describes how these problems can be solved with layered technology processes within a very short time.
Ključne besede: manufacturing technologies, prototype generation, rapid prototyping, numerical copying, CAD/CAm, digitalization
Objavljeno: 01.06.2012; Ogledov: 922; Prenosov: 58
URL Povezava na celotno besedilo

Rapid control prototyping using MATLAB/Simulink and a DSP-based motor controller
Darko Hercog, Karel Jezernik, 2005, izvirni znanstveni članek

Opis: A rapid control prototyping (RCP) system, based on commercially available software and custom in-house developed hardware is presented. An RCP system successfully combines the well-known simulation program MATLAB/Simulink and the custom DSP-based floating point motor controller. An RCP system provides smooth and fast transition from off-line simulation in Simulink to real-time operation on the embedded motor controller. On-the-fly parameter tuning and data visualization are provided in addition to rapid code generation. The presented solution represents a powerful, versatile and portable RCP system especially suitable for educational processes as well as motor control research. This article is supplemented by an example of cascade DC motor control.
Ključne besede: control education, control experiments, rapid control prototyping, DSP controller
Objavljeno: 01.06.2012; Ogledov: 1226; Prenosov: 33
URL Povezava na celotno besedilo

Development of a 3D printer for thermoplastic modelling
Bogdan Valentan, Dušan Pogačar, Tomaž Brajlih, Tjaša Zupančič Hartner, Ana Pilipović, Igor Drstvenšek, 2012, izvirni znanstveni članek

Opis: Additive technologies are entering the market in all price segments and the development of new machines and materials is rapidly growing. Machines under 2000 EUR are more and more interesting for home and educational use. This paper presents the development of a 3D printer that shapes the parts layer by layer by depositing the material on a predefined position. The development is presented from the engineering point of view. The construction steps, the control and the actuator solutions are presented. The ABS plastic was analysed for its material properties. The 3D printer evolved from a prototype to the pre-production phase.
Ključne besede: polymers, rapid prototyping, additive technologies, 3D print
Objavljeno: 10.07.2015; Ogledov: 622; Prenosov: 76
.pdf Celotno besedilo (1,37 MB)
Gradivo ima več datotek! Več...

Development of a part-complexity evaluation model for application in additive fabrication technologies
Bogdan Valentan, Tomaž Brajlih, Igor Drstvenšek, Jože Balič, 2011, izvirni znanstveni članek

Opis: Klasičnim odrezovalnim postopkom so se v zadnjih letih pridružili tako imenovani dodajalni postopki (slojevite tehnologije ali po domače 3D-tiskalniki). Če smo še pred leti vsaj okvirno vedeli kateri postopek izbrati za kateri izdelek, pa danes, ob upoštevanju vedno širše palete slojevitih tehnologij, temu ni več tako in le redki posamezniki še zmorejo slediti razvoju na tem izredno živahnem in hitro rastočem področju. Predstavljen je način določanja kompleksnosti izdelka na osnovi 3D-modela in uporaba izračuna pri izbiri izdelovalnega postopka ter določanju časa poobdelave pri določenih slojevitih tehnologijah. Članek opisuje osnovne značilnosti formata STL kot izhodne CAD-datoteke, ki predstavlja osnovo za analizo in razvoj postopkov določanja kompleksnosti oblike samega modela. Predstavljenih je več modelov iz realnega okolja, na katerih je izvedena analiza vhodnih podatkov in postopek določanja kompleksnosti oblike. Predstavljeni so aktualni izdelovalni postopki, primerni tako za izdelavo unikatnih izdelkov kot tudi za serijsko izdelavo, s posebnim poudarkom na slojevitih tehnologijah. Na osnovi temeljnih lastnosti izdelovalnih tehnologij so analizirani testni modeli in s pomočjo ocene kompleksnosti določeni primerni postopki izdelave oziroma čas, potreben za poobdelavo posameznega izdelka, izdelanega po postopkih slojevitih tehnologij. Rezultati so primerljivi z izkustveno določitvijo izdelovalnega postopka na osnovi ocene strokovnjakov, tako da je ob manjših dodelavah metoda tudi praktično uporabna. Sistem dokaj natančno izloči modele, ki jih je moč izdelati po postopku struženja, prav tako je ustrezno določena meja za uporabo rezkalnega stroja. Pri slojevitih tehnologijah enoznačno izbiro omejuje dejstvo, da te tehnologije v večini primerov omogočajo izdelavo izdelkov ne glede na njihovo kompleksnost. Izbira se je tako omejila na dve skupini, in sicer slojevite tehnologije, pri katerih je potreben dodaten podporni material, in slojevite tehnologije, pri katerih podporni material ni potreben, oziroma ga je mogoče reciklirati. Pri izbiri izdelovalnega postopka bi, ob upoštevanju določenih dodatnih omejitev posameznih slojevitih tehnologij, bila mogoča natančnejša izbira glede na kriterije, kot so čas izdelave, proizvodni stroški, material idr., vendar bi to zahtevalo aktualno bazo podatkov o samih postopkih. Sam način izračuna je bil izbran zaradi razmeroma preprostega izračuna in dokaj natančnega določanja kompleksnosti. Uporaba kompleksnosti za določanje izdelovalnega postopka pred tem ni bila raziskana. S problemom določanja časa poobdelave se danes srečujemo pri praktično vseh slojevitih tehnologijah, ta dejavnik pa bistveno vpliva tako na celoten čas izdelave kot tudi na ceno izdelka. Predstavljena rešitev omogoča izračun časa poobdelave na uporabniku razumljiv način in ob upoštevanju individualnih vplivov specifične naprave s preprosto primerjalno metodo glede na čas poobdelave testnih modelov.
Ključne besede: rapid prototyping, STl, complexity, shape, layered technology, technology selection
Objavljeno: 10.07.2015; Ogledov: 493; Prenosov: 61
URL Povezava na celotno besedilo

Control and robotics remote laboratory for engineering education
Riko Šafarič, Mitja Truntič, Darko Hercog, Gregor Pačnik, 2005, izvirni znanstveni članek

Opis: The new tools for education of engineering emerged and one of the most promising is a remote rapid control prototyping (RRCP), which is very useful also for control and robotics development in industry and in education. Examples of introductory remote control and simple robotic. courses with integrated hand, on experiments are presented in the paper. The aim o/: integration of remote hand on experiments into control and/or robotics course is to minimize the gap between the theory and practice to teach students the use of RRCP and to decrease the education costs. Developed RRCP experiments are based on MATLAB/Simulink, xPC target, custom developed embedded target for DSP-2 controller and LabVIEW virtual instrument.
Ključne besede: education of control and robotics, rapid prototyping, remote engineering
Objavljeno: 19.07.2017; Ogledov: 348; Prenosov: 57
.pdf Celotno besedilo (1,80 MB)
Gradivo ima več datotek! Več...

Iskanje izvedeno v 0.18 sek.
Na vrh
Logotipi partnerjev Univerza v Mariboru Univerza v Ljubljani Univerza na Primorskem Univerza v Novi Gorici