25 research outputs found
Optimizing Time Utilization of FMS
The aim of the research is to solve the problem of simultaneous production on the flexible manufacturing system with different combination of product types and quantities that will give maximal utilization of production system. The presumption for good utilization of FMS (Flexible Manufacturing System) is in forming of working order with such product type structure that will make possible of production processing with minimal time load of complete production system. Working order structure from the point of product types and quantities is dictated by market demands that are known earlier. Because the structure of particular working order is not harmonized with the exploitation characteristics of FMS, we are faced with problem how to realize working order in such conditions as well as how to achieve main goal: shorter machining cycle with less time occupation of production system. The method based on two phases for solving problem of control working order realization is presented in the work. In the first phase the selection of optimal combination of process plans which gives minimal time load of production system through simultaneous production of different products and their quantities is given. In the second phase the order of part production and the order of particular operations processing is optimized. The optimization problem in both phases of control is solved by application of genetic algorithm approach. The software for computing and optimizing of processing order on FMS is developed
Contribution to faster artifact classification by creating an expert database
This paper proposes a method for faster classification of artifacts that appear during radiological recordings. Section images containing artifacts require significant additional post-processing time
compared to other, artifact-free sections. The areas containing artifacts were identified and gradually analyzed in order to optimize the fabrication process. Guidelines for creation of an expert database are given. A suggestion is presented for defining a new expert knowledge database filling method
An Economic and Visual System for Position Check
Fast and efficient position check is extremely important in the production cycle. It is hard for us to check every particular detail in series because of the short time period. So far, the mode of operation has been associated with statistical laws. Depending on the size of series, a random sample is taken in certain percentage, and afterwards the position and geometry are manually controlled. This paper attempts to analyze photogrammetrical approach which allows simple automatically controlled positions set in advance as well as undemanding documentation of all analyzed parts. This kind of approach came into being in a vast industrial environment with a great tendency for further development. For the purpose of the research, the program solution has been developed. This kind of approach recognizes the type and sort of parts automatically and then loads relevant control positions from the database. The proposed approach reduces time needed for position control and therefore enables greater control of higher amount of parts which in turn directly contributes to earlier failure detection. On the other side, program solution can easily be adapted to specific situations in the production plant. As a result of the increase of automatization level, the need for employment is lower and as a result also the cost of control
Uporaba tehnoloÅ”ke dokumentacije kod izrade fiksacijskih ploÄica za vestibuloplastiku
Aim: The implementation of computer applications has become a necessary step in providing higher quality service to patients receiving dental/medical prosthodontic restorations.
Thus, the aim of this research was to determine the time necessary for the vestibuloplasty
fixation plate manufacturing using the computer aided method based on the computer-
aided design and computer-aided manufacturing (CAD/CAM) technologies, and then compare it with the conventional method, which is presently used in common practice. Methods: During this research two vestibuloplasty fixation plates were manufactured. The first one was made as per conventional method using the alginate impression and hard stone, while the other one was made using new computer aided method based on the CAD/CAM technologies. Using both methods, we analysed the total time for fixation plate manufacturing
as well as necessary steps in process. In addition, access, documentation creation and transport between dental laboratory and the dental/medical office time were also analyzed.
Results: The use of the CAD/CAM technologies ensures the continuity of all steps in the process of vestibuloplasty fixation plate production. Electronic documentation created in this way can be stored at a network server and become available for wider range of users. Data analysis indicates that the number of steps used in the computer based method is decreased
for 18,1 % compared with the conventional method. Improvements indicate that documentation preparation time was decreased for 30,0 %, and time for documentation access
was reduced for 86,7 %. Time for documentation creation was decreased for 40,0 %. This computer method also increased transport time efficiency for 83,3 %. In comparison with the conventional method, the total time necessary for fixation plate manufacure was significantly reduced for 51,6 %. Discussion: The use of computer aided method based on the CAD/CAM technologies in comparison with the conventional method significantly accelerates
production time in dental/medical office thus raising the level of service.Cilj: U svrhu pružanja kvalitetnije usluge bolesnicima dentalno-medicinske protetike, implementacija raÄunalnih rjeÅ”enja postala je nužan korak. Stoga je cilj ovog rada utvrditi potrebno
vrijeme za izradu fiksacijske ploÄice za vestibuloplastiku raÄunalnim rjeÅ”enjima baziranim na CAD/CAM (engl. computer-aided design and computer-aided manufacturing) tehnologiji i usporediti
ga s izradom fiksacijske ploÄice konvencionalnom metodom, uobiÄajenom u praksi. Metoda:
Tijekom ovog istraživanja izraÄene su dvije fiksacijske ploÄice. Jedna ploÄica izraÄena je konvencionalnom metodom pomoÄu alginatnog otiska i sadrenog modela, a druga uporabom novih raÄunalnih rjeÅ”enja i CAD/CAM tehnologijom. KoriÅ”tenjem obje metode analizirano je ukupno
vrijeme potrebno za izradu fiksacijske ploÄice, kao i broj potrebnih koraka za izradu istih. TakoÄer
je analizirano vrijeme potrebno za izradu i pristup dokumentaciji, te vrijeme transporta izmeÄu
zubotehniÄkog laboratorija i ordinacije dentalno-medicinske protetike. Rezultati: Uporabom CAD/CAM tehnologije osigurala se slijednost svih koraka u postupku izrade fiksacijske ploÄice, a raÄunalna dokumentacija mogla se pohraniti na serveru i uÄiniti dostupnom Å”irem krugu
korisnika. Analizom podataka vidjelo se da je broj koraka primjenom raÄunalne metode u odnosu
na konvencionalnu manji za 18,1 %. Vrijeme potrebno za pripremu dokumentacije kraÄe je za 30,0 %, za pristup dokumentaciji 86,7 %, dok je vrijeme za izradu dokumentacije manje za 40,0 %. Primjenom raÄunalne metode vrijeme transporta skraÄeno je za 83,3 %. Ukupno vrijeme izrade
fiksacijske ploÄice raÄunalnom metodom u odnosu na konvencionalnu metodu smanjeno je za 51,6 %. Rasprava: Uporaba raÄunalne tehnologije u odnosu na konvencionalnu metodu znaÄajno ubrzava vrijeme rada u dentalno-medicinskoj protetici, te na taj naÄin podiže razinu usluge
MARKETING RESEARCH IN PRODUCT DEVELOPMENT FUNCTION
DugoroÄnim se planiranjem opÄa poslovna politika pretvara u konkretne poslovne zadatke koje treba realizirati na putu prema jedinstvenom cilju poslovnog sustava. Da bi se mogao donijeti dugoroÄni plan razvoja proizvodnog programa, treba obaviti mnoge složene aktivnosti koje se nazivaju marketinÅ”kim istraživanjima razvoja proizvoda. U Älanku je analizirana uloga marketinga u razvoju proizvoda, s posebnim osvrtom na istraživanje i analizu tržiÅ”ta s namjerom utvrÄivanja opÄih tendencija, zahtjeva, želja i potreba tržiÅ”ta za proizvodima poslovnog sustava. Prikazane su podjele prikupljenih podataka te naÄini njihova dobivanja s osvrtom na metode i tehnike istraživanja tržiÅ”ta.In the long term, the planning of general business policy translates into concrete business assignments that must be realized in view of a unique business system goal. In order to define of one longāterm production development program plan it is necessary to perform many complex activities generally known as product development marketing research. This article analyses the marketing role in product development with a specific overview of research and market analysis with the purpose of establishing the tendencies, demands, wishes and market needs of the business product system. The distribution of the collected data is shown along with the method for their obtainment in view of methods and market research techniques
Application of rapid prototyping technology in orofacial defects reconstruction
DanaÅ”nji trendovi u biotehnoloÅ”koj proizvodnji sve viÅ”e se baziraju na multidisciplinarnom pristupu. ZahvaljujuÄi snažnom razvoju raÄunala omoguÄeno je planiranje i projektiranje biomedicinskih implantata kroz 3D prikaz modela koÅ”tanih defekata orofacijalne regije. U tom smislu posebno je važna njihova detaljna analiza i kasnija proizvodnja na nekom od 3D printera nove generacije koja omoguÄuje izradu stvarnog modela lubanje. Pri tome za izradu
biomedicinskih implantata na raspolaganju stoji Äitav niz biokompatibilnih materijala od polimetil-metakrilata do titanskih slitina.Present trends in biotechnological manufacturing are mostly based on multidisciplinary approach. The fast development of computers enabled the planning and designing of biomedical implants through the 3D view model of bone defects in orofacial region. Regarding
this fact, the detailed model analysis is of special importance since it will enable the creation of realistic skull models in the future through a new generation of 3D printers. A wide range of new biocompatible materials, including polymethyl methacrylate and titanium alloys are available for the creation of biomedical implants
The use of technological documentation in vestibuloplasy fixture plate production
Cilj: U svrhu pružanja kvalitetnije usluge bolesnicima dentalno-medicinske protetike, implementacija raÄunalnih rjeÅ”enja postala je nužan korak. Stoga je cilj ovog rada utvrditi potrebno
vrijeme za izradu fiksacijske ploÄice za vestibuloplastiku raÄunalnim rjeÅ”enjima baziranim na CAD/CAM (engl. computer-aided design and computer-aided manufacturing) tehnologiji i usporediti
ga s izradom fiksacijske ploÄice konvencionalnom metodom, uobiÄajenom u praksi. Metoda:
Tijekom ovog istraživanja izraÄene su dvije fiksacijske ploÄice. Jedna ploÄica izraÄena je konvencionalnom metodom pomoÄu alginatnog otiska i sadrenog modela, a druga uporabom novih raÄunalnih rjeÅ”enja i CAD/CAM tehnologijom. KoriÅ”tenjem obje metode analizirano je ukupno
vrijeme potrebno za izradu fiksacijske ploÄice, kao i broj potrebnih koraka za izradu istih. TakoÄer
je analizirano vrijeme potrebno za izradu i pristup dokumentaciji, te vrijeme transporta izmeÄu
zubotehniÄkog laboratorija i ordinacije dentalno-medicinske protetike. Rezultati: Uporabom CAD/CAM tehnologije osigurala se slijednost svih koraka u postupku izrade fiksacijske ploÄice, a raÄunalna dokumentacija mogla se pohraniti na serveru i uÄiniti dostupnom Å”irem krugu
korisnika. Analizom podataka vidjelo se da je broj koraka primjenom raÄunalne metode u odnosu
na konvencionalnu manji za 18,1 %. Vrijeme potrebno za pripremu dokumentacije kraÄe je za 30,0 %, za pristup dokumentaciji 86,7 %, dok je vrijeme za izradu dokumentacije manje za 40,0 %. Primjenom raÄunalne metode vrijeme transporta skraÄeno je za 83,3 %. Ukupno vrijeme izrade
fiksacijske ploÄice raÄunalnom metodom u odnosu na konvencionalnu metodu smanjeno je za 51,6 %. Rasprava: Uporaba raÄunalne tehnologije u odnosu na konvencionalnu metodu znaÄajno ubrzava vrijeme rada u dentalno-medicinskoj protetici, te na taj naÄin podiže razinu usluge.Aim: The implementation of computer applications has become a necessary step in providing higher quality service to patients receiving dental/medical prosthodontic restorations.
Thus, the aim of this research was to determine the time necessary for the vestibuloplasty
fixation plate manufacturing using the computer aided method based on the computer-
aided design and computer-aided manufacturing (CAD/CAM) technologies, and then compare it with the conventional method, which is presently used in common practice. Methods: During this research two vestibuloplasty fixation plates were manufactured. The first one was made as per conventional method using the alginate impression and hard stone, while the other one was made using new computer aided method based on the CAD/CAM technologies. Using both methods, we analysed the total time for fixation plate manufacturing
as well as necessary steps in process. In addition, access, documentation creation and transport between dental laboratory and the dental/medical office time were also analyzed.
Results: The use of the CAD/CAM technologies ensures the continuity of all steps in the process of vestibuloplasty fixation plate production. Electronic documentation created in this way can be stored at a network server and become available for wider range of users. Data analysis indicates that the number of steps used in the computer based method is decreased
for 18,1 % compared with the conventional method. Improvements indicate that documentation preparation time was decreased for 30,0 %, and time for documentation access
was reduced for 86,7 %. Time for documentation creation was decreased for 40,0 %. This computer method also increased transport time efficiency for 83,3 %. In comparison with the conventional method, the total time necessary for fixation plate manufacure was significantly reduced for 51,6 %. Discussion: The use of computer aided method based on the CAD/CAM technologies in comparison with the conventional method significantly accelerates
production time in dental/medical office thus raising the level of service
The use of technological documentation in vestibuloplasy fixture plate production
Cilj: U svrhu pružanja kvalitetnije usluge bolesnicima dentalno-medicinske protetike, implementacija raÄunalnih rjeÅ”enja postala je nužan korak. Stoga je cilj ovog rada utvrditi potrebno
vrijeme za izradu fiksacijske ploÄice za vestibuloplastiku raÄunalnim rjeÅ”enjima baziranim na CAD/CAM (engl. computer-aided design and computer-aided manufacturing) tehnologiji i usporediti
ga s izradom fiksacijske ploÄice konvencionalnom metodom, uobiÄajenom u praksi. Metoda:
Tijekom ovog istraživanja izraÄene su dvije fiksacijske ploÄice. Jedna ploÄica izraÄena je konvencionalnom metodom pomoÄu alginatnog otiska i sadrenog modela, a druga uporabom novih raÄunalnih rjeÅ”enja i CAD/CAM tehnologijom. KoriÅ”tenjem obje metode analizirano je ukupno
vrijeme potrebno za izradu fiksacijske ploÄice, kao i broj potrebnih koraka za izradu istih. TakoÄer
je analizirano vrijeme potrebno za izradu i pristup dokumentaciji, te vrijeme transporta izmeÄu
zubotehniÄkog laboratorija i ordinacije dentalno-medicinske protetike. Rezultati: Uporabom CAD/CAM tehnologije osigurala se slijednost svih koraka u postupku izrade fiksacijske ploÄice, a raÄunalna dokumentacija mogla se pohraniti na serveru i uÄiniti dostupnom Å”irem krugu
korisnika. Analizom podataka vidjelo se da je broj koraka primjenom raÄunalne metode u odnosu
na konvencionalnu manji za 18,1 %. Vrijeme potrebno za pripremu dokumentacije kraÄe je za 30,0 %, za pristup dokumentaciji 86,7 %, dok je vrijeme za izradu dokumentacije manje za 40,0 %. Primjenom raÄunalne metode vrijeme transporta skraÄeno je za 83,3 %. Ukupno vrijeme izrade
fiksacijske ploÄice raÄunalnom metodom u odnosu na konvencionalnu metodu smanjeno je za 51,6 %. Rasprava: Uporaba raÄunalne tehnologije u odnosu na konvencionalnu metodu znaÄajno ubrzava vrijeme rada u dentalno-medicinskoj protetici, te na taj naÄin podiže razinu usluge.Aim: The implementation of computer applications has become a necessary step in providing higher quality service to patients receiving dental/medical prosthodontic restorations.
Thus, the aim of this research was to determine the time necessary for the vestibuloplasty
fixation plate manufacturing using the computer aided method based on the computer-
aided design and computer-aided manufacturing (CAD/CAM) technologies, and then compare it with the conventional method, which is presently used in common practice. Methods: During this research two vestibuloplasty fixation plates were manufactured. The first one was made as per conventional method using the alginate impression and hard stone, while the other one was made using new computer aided method based on the CAD/CAM technologies. Using both methods, we analysed the total time for fixation plate manufacturing
as well as necessary steps in process. In addition, access, documentation creation and transport between dental laboratory and the dental/medical office time were also analyzed.
Results: The use of the CAD/CAM technologies ensures the continuity of all steps in the process of vestibuloplasty fixation plate production. Electronic documentation created in this way can be stored at a network server and become available for wider range of users. Data analysis indicates that the number of steps used in the computer based method is decreased
for 18,1 % compared with the conventional method. Improvements indicate that documentation preparation time was decreased for 30,0 %, and time for documentation access
was reduced for 86,7 %. Time for documentation creation was decreased for 40,0 %. This computer method also increased transport time efficiency for 83,3 %. In comparison with the conventional method, the total time necessary for fixation plate manufacure was significantly reduced for 51,6 %. Discussion: The use of computer aided method based on the CAD/CAM technologies in comparison with the conventional method significantly accelerates
production time in dental/medical office thus raising the level of service