20.500.12556/RUL-183571 A control framework for the machining center with multiple spindlers Okvir za vodenje obdelovalnega centra z več vreteni The paper addresses the problem of minimizing the tool exchange time in computer numerically controlled (CNC) machining centres. The increasing variety of products and the demand for smaller quantities have placed a significant pressure on the CNC systems to enhance the adaptability, improve her flexibility, and shorten the preparation and operating times. In milling machines, a certain amount of the operating time is consumed during the tool exchange process. To reduce the exchange time, the paper proposes a solution that introduces a second spindle positioned physically close to the main spindle, controlled by a pneumatic system. For this purpose a novel control framework is developed that reduces the operation time, facilitates the operator handling, and improves the efficiency. A combinatorial optimization approach is then used to solve the tool scheduling problem, in order to minimize the total exchange time of the used tools. The presented novel approach to the machine is based on the initial and final positions of each tool and on the magazine holders positions. The experimental results show that by implementing a control framework to manipulate the multiple spindles, the reduction in the exchange time is significant and dependent on the number of tools needed for a certain machining process. Moreover, the tool scheduling algorithm optimizes the tools assignment at magazine locations and efficiently reduces the total execution time. This can be important for items with a short operational time and a large number of the used tools. Clanek obravnava problem zmanj ˇ sanja ˇ casa menjave orodij v ˇ racunalni ˇ sko krmiljenih (CNC) obdelovalnih centrih. Zaradi ˇ vse vecje raznolikosti izdelkov in manj ˇ sih serij se na CNC- ˇ sisteme vrsi pritisk po ve ˇ cji prilagodljivosti, kraj ˇ semˇ casu ˇ priprave in ucinkovitej ˇ sem delovanju. Pri rezkalnih strojih del ˇ obratovalnega casa odpade na menjavo orodij, zato ˇ clanek ˇ predlaga resitev z uvedbo drugega vretena, name ˇ sˇcenega v ˇ blizini glavnega in krmiljenega s pnevmatskim sistemom. Za ˇ ta namen je bil razvit nov okvir za vodenje, ki zmanjsuje ˇ cas ˇ delovanja, olajsa upravljanje in pove ˇ ca u ˇ cinkovitost. Za raz- ˇ porejanje orodij je uporabljena kombinatoricna optimizacija, ˇ ki minimizira skupni cas menjav glede na za ˇ cetne in kon ˇ cne ˇ polozaje orodij ter polo ˇ zaje dr ˇ zal v magazinu. Eksperimen- ˇ talni rezultati kazejo, da uporaba ve ˇ c vreten in predlaganega ˇ krmilnega okvira znatno skrajsaˇ cas menjave, pri ˇ cemer je ˇ prihranek odvisen od stevila uporabljenih orodij. Algoritem za ˇ razporejanje orodij dodatno optimizira njihovo razporeditev v magazinu in ucinkovito zmanj ˇ suje skupni ˇ cas obdelave, kar je ˇ posebej pomembno pri izdelkih s kratkim obratovalnim casom ˇ in velikim stevilom uporabljenih orodij. Computer Numeric Control (CNC) Automatic Tool Exchanger (ATC) multiple spindles combinatorial optimization automata orodja za računalniško krmiljenje (CNC) obdelovalni centri učinkovito delovanje optimizacija rezkalni stroji true false true Angleški jezik Slovenski jezik Članek v reviji 2026-06-15 12:46:48 2026-06-15 12:46:59 2026-06-16 04:04:30 0000-00-00 00:00:00 2025 0 0 Str. 181-190 št. 4 Letn. 92 2025 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 621.9-52 0013-5852 280485635 RAZ_Griparic_Karlo_2025.pdf RAZ_Griparic_Karlo_2025.pdf 1 5A67D9E501606ED66988A36F4ED21355 7119a3b9d2a9f282165e56f353eaf8ab19cea7f9c0853626c3704838b34a873a 7c1e478c-68a7-11f1-9b0d-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=235647 https://ev.fe.uni-lj.si/4-2025/Griparic.pdf 0 bcdfccf2-68a7-11f1-9b0d-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=235648 Fakulteta za elektrotehniko Elektrotehniški vestnik 0 0 0