Opis: Diplomsko delo predstavlja razvoj novega izdelka, ki je osnova za ustanovitev novega mladega podjetja. Izdelek je zvočnik, ki predvaja usmerjen zvok in se imenuje Acouspade. Zvočnik projicira zvok samo v eno točko v prostoru in ta zvok je slišen samo tam. Ker je to novo podjetje, je potrebno najti način, da se bo izdelek čim ceneje izdeloval. Z optimiranjem oblike izdelka smo ga poenostavili do te mere, da ga je možno izdelovati v enostavnih, dvodelnih orodjih s postopkom brizganja plastičnih mas. Pri tem postopku zapletenost orodja pomembno vpliva na ceno. V diplomskem delu je predstavljen celoten postopek konstruiranja orodja za brizganje plastike. Sklepna ugotovitev je, da s prilagajanjem izdelka do te mere, da je orodje zanj enostavno, postane tudi izdelava manjših serij rentabilna.
Najdeno v: osebi
Povzetek najdenega: ...tehnologije in sistemi Mentor: Somentor: izr. prof. dr. Igor DRSTVENSEK asist. mag. Tomaz BRAJLIH Maribor, september 2011 -I- -...
Ključne besede: brizganje plastičnih mas, proizvodne tehnologije, konstruiranje orodij, izdelava prototipov
Objavljeno: 04.10.2011; Ogledov: 975; Prenosov: 124
Polno besedilo (2,07 MB)

Opis: Diplomsko delo je nastalo s področja merjenja skupne učinkovitosti opreme v proizvodnem procesu. Ta metoda se je razvila v 90 – tih letih, ko so se najboljša podjetja zavedala, da je za povečanje konkurenčnosti potrebno nenehno izboljševati proizvodne procese in z medsebojno primerjavo meriti konkurenčnost na trgu. Uporablja se za spremljanje in analiziranje vseh zastojev v proizvodnih procesih v realnem času. Podatke največkrat zbirajo operaterji s pomočjo preglednic, zato so rezultati zbranih podatkov velikokrat odvisni od subjektivne ocene operaterja in organizacijske kulture v podjetju. Cilj diplomskega dela je bila uvedba avtomatskega zajemanja podatkov o zastojih na izbranem tiskarskem stroju MPS EP 410/8, kar smo izvedli z uporabo komercialne mobilne naprave za zajem podatkov. Na napravo smo priključili vhodni digitalni signal, ki nam daje podatek o stanju stroja – stroj je v obratovanju in stroj stoji. Na osnovi ročno zbranih podatkov o zastojih smo izdelali klasifikacijo zastojev, ki smo jih ustrezno sprogramirali in namestili v mobilno napravo Master IV. Ko naprava v realnem času dobi informacijo, da se je stroj ustavil mora operater v napravo vnesti bistveni podatek zakaj stroj stoji. Za vnos podatkov lahko koristi le predhodno vnesene vzroke. Na tak način se izognemo subjektivnim ocenam operaterja in ga prisilimo v realno vnašanje podatkov saj imamo napravo dnevno pod nadzorom preko interneta. Če dobimo podatek, da stroj stoji, zraven pa operater ni zabeležil vzroka ga lahko pobaramo, da ne izpolnjuje delovnih obveznosti. Hkrati ga seznanimo z rezultati analize in ko ugotovi, da veliko vzrokov za zastoje ni povzročil on, temveč so posledica slabe organizacijske kulture, kmalu vnos podatkov vzame resno saj ugotovi, da ga lahko zaščitijo. S takšnim načinom zajemanja proizvodnih podatkov in izračunom skupne učinkovitosti opreme smo vodstvu podjetja zagotovili kakovostne informacije o stanju in dogajanju v proizvodnji, ki jih lahko uporabljajo za nadaljnje strateško vodenje in razvoj proizvodnje.
Najdeno v: osebi
Povzetek najdenega: ...strokovni; Strojnistvo Vzdrzevanje Mentor: Somentor: izr. prof. dr. Igor DRSTVENSEK doc. dr. Samo ULAGA Maribor, september 2011 IZJAVA Podpisani Denis...
Ključne besede: skupna učinkovitost opreme, razpoložljivost, zmogljivost, kakovost, proizvodni podatki, avtomatski zajem, naprava Datafox AE – Master IV, stroj MPS EP 410/8
Objavljeno: 07.10.2011; Ogledov: 453; Prenosov: 28
Polno besedilo (2,85 MB)

Opis: In the last decades, the technical field of additive layered manufacturing (ALM) has offered aid in medical reconstruction procedures in order to help surgeons reconstruct physical faults and anomalies of their patients. Using a combination of Computer Assisted Design (CAD), high medical skills and latest ALM technologies, it is now possible to help patients with birth defects or those suffering from craniofacial injuries of variable severities, retain aesthetic and functional properties of their bodies. Combined with traditional CT scanning techniques rapid technologies (prototyping and tooling) can be used as instruments for better (three-dimensional) visualization, simulation of procedures and treatment of patients. They also improve the overall performances of medical and nursing staff thus influencing the quality of medical service. Using a combination of Computer Assisted Design (CAD), high medical skills and latest rapid prototyping and manufacturing technologies, it is now possible to help patients with craniofacial deformities as birth defects, orthognathic deformities, deformities after malignancy treatment or the consequences of craniofacial injuries of variable severities, resulting in both aesthetic and functional alterations. This paper presents some clinical cases, carried out in cooperation of Faculty of Mechanical Engineering in Maribor and both University Clinical Centres in Slovenia, where virtual models have been used for surgical preparations and RP models for manufacturing of implants.
Najdeno v: osebi
Povzetek najdenega: ...of Rapid Prototyping in CranioMaxilofacial Surgery Procedures Igor Drstvensek1, Natasa Ihan Hren2, Tadej Strojnik3, Tomaz Brajlih1,...
Ključne besede: rapid prototyping, reverse engineering, custom implant, maxillofacial reconstructive surgery, cranioplasty, CT scanning
Objavljeno: 31.05.2012; Ogledov: 139; Prenosov: 5
Polno besedilo (0,00 KB)

Opis: Purpose of this paper is to present simple hybrid driven vehicle. Desire for a new kind of hybrid driven and ecologically acceptable vehicles led to the development of a new contemporary vehicle. Vehicle, capable of transporting two persons, is mainly driven by a human power and backed-up by an electro-motor. Suitably regulated, such a concept may bring a revolution in the city and suburbs transportation. Methodology used for vehicle design and production is based on modern CAD/CAM based with use of layered and rapid manufacturing technologies. For steering mechanism, an analytical mathematical background was used so that mathematically correct wheel path was achieved. In the course of the work, mathematically correct equation for steering mechanism was derived and later used for development of steering mechanism. Flexible torque regulation of the back-up electro-motor that enables us constant load regardless of terrain is also presented. With the project of hybrid drive vehicle, a concept of vehicle that can be ideal for city and sub city transport is presented. With flexible torque regulation, an adaptive exercise machine that can be used to exercise with desired load at any time during transportation is implemented. The whole vehicle presents a modern and ecologically acceptable transport solution, at the same time this is an instrument of simultaneous recreation as well as a mean of physical condition improvement. Paper presents development of cost efficient vehicle with some unique solutions, like Bowden cable steering mechanism and flexible torque regulation, and production with help of modern layered & rapid manufacturing technologies.
Najdeno v: osebi
Povzetek najdenega: ...TECHNOLOGIES IN PROTOTYPE PRODUCTION Valentan B.*, Brajlih T.*, Drstvensek I.*, Sever P.**, Horvat J.** & Balic...
Ključne besede: hybrid drive, layered technologies, alternative vehicles, ecologically transportation, bowden steering
Objavljeno: 31.05.2012; Ogledov: 179; Prenosov: 0
Polno besedilo (0,00 KB)

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.
Najdeno v: osebi
Ključne besede: gray cast iron, layered technologies, rapid prototyping, rapid manufacturing, sand casting
Objavljeno: 31.05.2012; Ogledov: 188; Prenosov: 1
Polno besedilo (0,00 KB)