21 KB247 KB19 KB200020242009Sagbas, Aysunštevilka:1letnik:43str. 55-59ISSN:1580-2949COBISSID:717226URN:URN:NBN:SI:doc-KNQ0MRGZenInštitut za kovinske materiale in tehnologijeMateriali in tehnologijekontrolakvalitetaproizvodni procesistatistične metodestruženjeImproving the process capability of a turning operation by the application of statistical techniques| Izboljšanje procesa sposobnosti struženja z uporabo statistične tehnike|Process-capability indices are effective tools for the continuous improvement of quality, productivity and managerial decisions. Statistical process-control techniques improve the quality in mass production. In this study, a process-capability analysis was carried out in the machining line of a medium-sized company that produces machine and spare parts. For this purpose, normal probability plots and histograms were prepared and the process-capability indices Csubp and Csub{pk} were calculated. It is shown that the process capability for the whole process was inadequate and that the mass production was unstable. In order to satisfy the process-capability measures it is necessary to improve the quality level by shifting the process mean to the target value and reducing the variations in the processIndeksi sposobnosti so za procese učinkovita orodja za stalno izboljševanje kakovosti, produktivnosti in vodstvenih odločitev. Statistična tehnika kontrole procesa omogoči izboljšanje kakovosti pri masovni proizvodnji. V tej študiji je bila izvršena ocena procesa za obdelovalno linijo srednje velike družbe, ki izdeluje stroje in rezervne dele. Za ta namen so bili pripravljeni histogrami normalne verjetnosti in izračunani indeksi sposobnosti procesa (Cspodajp in Cspodaj{pk}. Pokazalo se je, da je bila procesna sposobnost za celoten proces neprimerna in je zato bila nestalna masovna proizvodnja. Za izboljšanje stanjaje bilo treba sprejeti ukrepe za dvig nivoja kakovosti s premikom povprečja procesa na ciljno vrednost in znižati njegovo variabilnostTEXTznanstveno časopisjejournalsSlovenian National E-content AggregatorNational and University Library of SloveniaInštitut za kovinske materiale in tehnologije