{"id":4329,"date":"2026-05-04T09:30:37","date_gmt":"2026-05-04T07:30:37","guid":{"rendered":"https:\/\/ellistat.com\/?p=4329"},"modified":"2026-05-04T09:49:41","modified_gmt":"2026-05-04T07:49:41","slug":"megmunkalasi-selejt-csokkentese-okok-es-megoldasok-ellistat","status":"publish","type":"post","link":"https:\/\/ellistat.com\/hu\/reduire-les-rebuts-en-usinage-causes-et-solutions-ellistat\/","title":{"rendered":"A megmunk\u00e1l\u00e1si selejt cs\u00f6kkent\u00e9se: az okok meg\u00e9rt\u00e9se a hat\u00e9kony fell\u00e9p\u00e9s \u00e9rdek\u00e9ben"},"content":{"rendered":"<p class=\"wp-block-paragraph\">Egy prec\u00edzi\u00f3s m\u00e9rn\u00f6ki m\u0171helyben minden egyes nem megfelel\u0151 alkatr\u00e9sz k\u00e9tszeres k\u00f6lts\u00e9get jelent: egyszer anyagk\u00f6lts\u00e9get \u00e9s g\u00e9pid\u0151t, m\u00e1sodszor pedig feldolgoz\u00e1si k\u00f6lts\u00e9get (ut\u00f3munka, v\u00e1logat\u00e1s, selejt, vev\u0151i reklam\u00e1ci\u00f3). M\u00e9gis sok m\u0171hely m\u00e9g mindig elker\u00fclhetetlennek tekinti a selejtek ar\u00e1ny\u00e1t, holott ez egy elemzend\u0151 jel kellene, hogy legyen. A megmunk\u00e1l\u00e1s sor\u00e1n keletkez\u0151 selejt cs\u00f6kkent\u00e9se nem a kezel\u0151k j\u00f3indulat\u00e1nak vagy fokozott \u00e9bers\u00e9g\u00e9nek k\u00e9rd\u00e9se. Ez a m\u00f3dszer, a m\u00e9r\u00e9s \u00e9s a v\u00e1ltoz\u00e9konys\u00e1g ellen\u0151rz\u00e9s\u00e9nek k\u00e9rd\u00e9se. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ez a cikk a mechanikai gy\u00e1rt\u00e1s sor\u00e1n keletkez\u0151 selejt leggyakoribb okait, a cs\u00f6kkent\u00e9s\u00fckh\u00f6z rendelkez\u00e9sre \u00e1ll\u00f3 eszk\u00f6z\u00f6ket, valamint azt vizsg\u00e1lja, hogy a modern eszk\u00f6z\u00f6kkel hogyan lehet a probl\u00e9m\u00e1t a forr\u00e1sn\u00e1l kezelni.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Mi\u00e9rt van m\u00e9g mindig magas a selejt ar\u00e1nya oly sok m\u0171helyben?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Az els\u0151 hiba az, hogy a selejt ok\u00e1t az \u00fczemeltet\u0151ben keress\u00fck. Az esetek t\u00falnyom\u00f3 t\u00f6bbs\u00e9g\u00e9ben a hib\u00e1k rendszerszint\u0171 okok k\u00f6vetkezm\u00e9nyei: nyersanyag-v\u00e1ltoz\u00e9konys\u00e1g, g\u00e9pi h\u0151m\u00e9rs\u00e9klet-eltol\u00f3d\u00e1s, szersz\u00e1mkop\u00e1s, pontatlan kezdeti be\u00e1ll\u00edt\u00e1sok.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Egy 3 vagy 4 % selejttel m\u0171k\u00f6d\u0151 m\u0171helynek \u00e1ltal\u00e1ban nincs hum\u00e1n k\u00e9szs\u00e9gekkel kapcsolatos probl\u00e9m\u00e1ja. Probl\u00e9m\u00e1ja van a folyamat elsaj\u00e1t\u00edt\u00e1s\u00e1val.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">N\u00e9h\u00e1ny gyakori ok, amelyet a finommechanik\u00e1ban megfigyeltek:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Kompenz\u00e1latlan termikus sodr\u00f3d\u00e1s<\/strong>\u00a0Amikor a g\u00e9p a gy\u00e1rt\u00e1s sor\u00e1n felmelegszik, a m\u00e9retek fokozatosan eltol\u00f3dnak, \u00e9s az alkatr\u00e9szek kiker\u00fclnek a t\u0171r\u00e9shat\u00e1rb\u00f3l.<\/li>\n\n\n\n<li><strong>Hozz\u00e1vet\u0151leges kezdeti be\u00e1ll\u00edt\u00e1s<\/strong>\u00a0Az els\u0151 j\u00f3 r\u00e9sz vizu\u00e1lisan vagy k\u00e9zi m\u0171szerrel, statisztikai elemz\u00e9s n\u00e9lk\u00fcl ker\u00fcl valid\u00e1l\u00e1sra. A kezel\u0151 egy nem optim\u00e1lis k\u00f6zpontoz\u00e1sb\u00f3l indul ki.<\/li>\n\n\n\n<li><strong>A szersz\u00e1m kop\u00e1s\u00e1t nem \u00e9szlelt\u00e9k id\u0151ben<\/strong>\u00a0Val\u00f3s idej\u0171 v\u00e1ltoz\u00e9konys\u00e1gi fel\u00fcgyelet n\u00e9lk\u00fcl a kop\u00e1ssal \u00f6sszef\u00fcgg\u0151 elt\u00e9r\u00e9s csak t\u00f6bb, nem megfelel\u0151 alkatr\u00e9sz legy\u00e1rt\u00e1sa ut\u00e1n der\u00fcl ki.<\/li>\n\n\n\n<li><strong>Nem vett\u00e9k figyelembe az anyagi v\u00e1ltoz\u00e9konys\u00e1got<\/strong>\u00a0Az azonos besz\u00e1ll\u00edt\u00f3t\u00f3l sz\u00e1rmaz\u00f3 nyersanyagok k\u00e9t t\u00e9tele nem mindig viselkedik azonos m\u00f3don a megmunk\u00e1l\u00e1s sor\u00e1n.<\/li>\n\n\n\n<li><strong>Megb\u00edzhatatlan m\u00e9r\u0151m\u0171szerek<\/strong>\u00a0Egy kalibr\u00e1latlan kalibr\u00e1l\u00f3, egy rosszul felszerelt kompar\u00e1tor - a m\u00e9r\u00e9s rossz, \u00e9s a m\u00e9r\u00e9s alapj\u00e1n hozott d\u00f6nt\u00e9s is rossz.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Mit m\u00e9r val\u00f3j\u00e1ban a selejt: bevezet\u00e9s a k\u00e9pess\u00e9gekbe<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Miel\u0151tt a selejt cs\u00f6kkent\u00e9s\u00e9re t\u00f6rekedne, hasznos meg\u00e9rteni, hogy mit mondanak a statisztik\u00e1k az \u00d6n folyamat\u00e1r\u00f3l. A Ppk index egy folyamat val\u00f3s k\u00e9pess\u00e9g\u00e9t m\u00e9ri: a megfigyelt v\u00e1ltoz\u00e9konys\u00e1g \u00e9s a megadott t\u0171r\u00e9shat\u00e1rok k\u00f6z\u00f6tti k\u00fcl\u00f6nbs\u00e9get fejezi ki.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Az 1-n\u00e9l kisebb Ppk azt jelenti, hogy a folyamat statisztikailag nem megfelel\u0151s\u00e9geket produk\u00e1l. Az 1,33-as Ppk \u00e9rt\u00e9ket gyakran tekintik a k\u00e9pes \u00e9s stabil folyamat k\u00fcsz\u00f6b\u00e9rt\u00e9k\u00e9nek. E szint alatt a selejt nem meglepet\u00e9s: matematikailag el\u0151re l\u00e1that\u00f3.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ez a statisztikai olvasat alapvet\u0151 fontoss\u00e1g\u00fa, mert a \u00abki tette rossz\u00e1 a darabot\u00bb helyett a \u00abmi okozza ezt a v\u00e1ltoz\u00e9konys\u00e1got\u00bb k\u00e9rd\u00e9s\u00e9t helyezi \u00e1t. \u00c9s ez az, ahol a v\u00e1laszok teljesen megv\u00e1ltoznak.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Gyakorlati m\u00f3dszerek a megmunk\u00e1l\u00e1si selejt cs\u00f6kkent\u00e9s\u00e9re<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">1. A variabilit\u00e1s ellen\u0151rz\u00e9se a t\u00f6meggy\u00e1rt\u00e1s el\u0151tt<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">A kezdeti be\u00e1ll\u00edt\u00e1s mindent meghat\u00e1roz. Ha a g\u00e9p m\u00e1r eleve f\u00e1zison k\u00edv\u00fcl indul, a gy\u00e1rt\u00e1s k\u00f6zbeni korrekci\u00f3k egyszer\u0171en csak a tart\u00f3s k\u00e9s\u00e9st p\u00f3tolj\u00e1k. A leghat\u00e9konyabb megk\u00f6zel\u00edt\u00e9sek alapja a :<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>az els\u0151 r\u00e9szek szisztematikus m\u00e9retez\u00e9se,<\/li>\n\n\n\n<li>a sorozat elind\u00edt\u00e1sa el\u0151tt egy k\u00f6zpontos\u00edt\u00f3 elemz\u00e9s,<\/li>\n\n\n\n<li>g\u00e9pi offset-korrekci\u00f3 a sorozatgy\u00e1rt\u00e1s el\u0151tt.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Pontosan ez az, amit egy automatiz\u00e1lt folyamatir\u00e1ny\u00edt\u00f3 rendszer (<a href=\"https:\/\/ellistat.com\/hu\/automatizalt-folyamatiranyito-szoftver\/\" type=\"page\" id=\"205\">APC<\/a>): elemzi az els\u0151 r\u00e9szeket, kisz\u00e1m\u00edtja az eltol\u00e1st, \u00e9s k\u00e9zi beavatkoz\u00e1s n\u00e9lk\u00fcl korrig\u00e1lja a g\u00e9pi korrekci\u00f3kat. Az els\u0151 j\u00f3 alkatr\u00e9sz m\u00e1r a kezdetekt\u0151l fogva elk\u00e9sz\u00fcl, nem pedig t\u00edz pr\u00f3badarab ut\u00e1n.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">2. A drift val\u00f3s idej\u0171 \u00e9szlel\u00e9se az SPC-vel<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Statisztikai folyamatszab\u00e1lyoz\u00e1s (<a href=\"https:\/\/ellistat.com\/hu\/spc-szoftver\/\" type=\"page\" id=\"801\">SPC<\/a>) a gy\u00e1rt\u00e1s k\u00f6zbeni m\u00e9r\u00e9sek ellen\u0151rz\u00e9si t\u00e1bl\u00e1zatokon t\u00f6rt\u00e9n\u0151 nyomon k\u00f6vet\u00e9s\u00e9b\u0151l \u00e1ll. Ha elt\u00e9r\u00e9s jelentkezik, m\u00e9g akkor is, ha az alkatr\u00e9szek m\u00e9g a t\u0171r\u00e9shat\u00e1ron bel\u00fcl vannak, az SPC \u00e9szleli azt, \u00e9s figyelmezteti a kezel\u0151t.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ez a k\u00fcl\u00f6nbs\u00e9g a gy\u00f3gy\u00edt\u00f3 \u00e9s a megel\u0151z\u0151 int\u00e9zked\u00e9sek k\u00f6z\u00f6tt: a nem megfelel\u0151 term\u00e9kek gy\u00e1rt\u00e1s\u00e1t m\u00e1r el\u0151tte le\u00e1ll\u00edtjuk, nem pedig ut\u00e1na.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A megfelel\u0151en v\u00e9grehajtott SPC-ellen\u0151rz\u00e9s lehet\u0151v\u00e9 teszi a k\u00f6z\u00f6s okok (a folyamat term\u00e9szetes v\u00e1ltoz\u00e9konys\u00e1ga) \u00e9s a hozz\u00e1rendelhet\u0151 okok (anyagt\u00e9tel-v\u00e1ltoz\u00e1s, szersz\u00e1mkop\u00e1s, g\u00e9pi incidens) megk\u00fcl\u00f6nb\u00f6ztet\u00e9s\u00e9t is. E megk\u00fcl\u00f6nb\u00f6ztet\u00e9s n\u00e9lk\u00fcl a korrekci\u00f3s int\u00e9zked\u00e9sek gyakran nem el\u00e9gg\u00e9 c\u00e9lzottak.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">3. Megb\u00edzhat\u00f3 m\u00e9r\u00e9s<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Egy m\u00e9r\u00e9si eredm\u00e9ny csak akkor \u00e9rt\u00e9kes, ha az azt el\u0151\u00e1ll\u00edt\u00f3 m\u0171szer megb\u00edzhat\u00f3. A vizsg\u00e1latok <a href=\"https:\/\/ellistat.com\/hu\/meromuszer-r-r\/\" type=\"page\" id=\"1102\">Gage R&amp;R <\/a>arra szolg\u00e1lnak, hogy sz\u00e1mszer\u0171s\u00edts\u00e9k a m\u00e9r\u0151rendszerb\u0151l ered\u0151 v\u00e1ltoz\u00e9konys\u00e1g ar\u00e1ny\u00e1t. Egyes m\u0171helyekben ez a v\u00e1ltoz\u00e9konys\u00e1g a t\u0171r\u00e9s jelent\u0151s r\u00e9sz\u00e9t teszi ki, ami azt jelenti, hogy a v\u00e1logat\u00e1ssal vagy selejtez\u00e9ssel kapcsolatos d\u00f6nt\u00e9sek r\u00e9szben a m\u00e9r\u00e9si zajon alapulnak.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Tov\u00e1bb\u00e1 a kalibr\u00e1l\u00e1si id\u0151intervallumon k\u00edv\u00fcli m\u0171szer haszn\u00e1lata olyan hiba, amelyet a min\u0151s\u00e9gellen\u0151rz\u00e9s haboz\u00e1s n\u00e9lk\u00fcl szankcion\u00e1l. A m\u0171szer\u00e1llom\u00e1ny szigor\u00fa kezel\u00e9se (\u00e9lettartam-lapok, kalibr\u00e1ci\u00f3s riaszt\u00e1sok, automatikus blokkol\u00e1s) kik\u00fcsz\u00f6b\u00f6li ezt a kock\u00e1zatot.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">4. A k\u00e9szletek intelligens vez\u00e9rl\u00e9se<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">A v\u00e1s\u00e1rolt nyersanyagok \u00e9s alkatr\u00e9szek jelent\u0151sen hozz\u00e1j\u00e1rulnak a termel\u00e9s v\u00e1ltoz\u00e9konys\u00e1g\u00e1hoz. A besz\u00e1ll\u00edt\u00f3 t\u00e9nyleges min\u0151s\u00e9g\u00e9n alapul\u00f3 szisztematikus bej\u00f6v\u0151 ellen\u0151rz\u00e9s lehet\u0151v\u00e9 teszi a probl\u00e9m\u00e1s t\u00e9telek felder\u00edt\u00e9s\u00e9t, miel\u0151tt azok a gy\u00e1rt\u00e1sba ker\u00fcln\u00e9nek.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Szabv\u00e1nyok <a href=\"https:\/\/www.iso.org\/obp\/ui\/#iso:std:iso:2859:-1:ed-2:v1:fr\" type=\"link\" id=\"https:\/\/www.iso.org\/obp\/ui\/#iso:std:iso:2859:-1:ed-2:v1:fr\">ISO 2859<\/a> \u00e9s<a href=\"https:\/\/www.iso.org\/fr\/standard\/74706.html\" type=\"link\" id=\"https:\/\/www.iso.org\/fr\/standard\/74706.html\"> ISO 3951<\/a> keretet biztos\u00edtanak a fokozatos ellen\u0151rz\u00e9si m\u00f3dszerekhez: min\u00e9l megb\u00edzhat\u00f3bb a sz\u00e1ll\u00edt\u00f3 az id\u0151 m\u00fal\u00e1s\u00e1val, ann\u00e1l kevesebb ellen\u0151rz\u00e9sre ker\u00fcl sor. Min\u00e9l kev\u00e9sb\u00e9 megb\u00edzhat\u00f3, ann\u00e1l szigor\u00fabbak az ellen\u0151rz\u00e9sek. Ez a dinamikus megk\u00f6zel\u00edt\u00e9s cs\u00f6kkenti az ellen\u0151rz\u00e9si terheket, mik\u00f6zben fenntartja ugyanazokat a magas sz\u00ednvonalat.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">5. Automatiz\u00e1lja a g\u00e9pbe\u00e1ll\u00edt\u00e1st: z\u00e1rja be a hurkot<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Ez a prec\u00edzi\u00f3s m\u00e9rn\u00f6ki m\u0171helyek legink\u00e1bb struktur\u00e1l\u00f3 karja. A szersz\u00e1mg\u00e9pekhez k\u00f6zvetlen\u00fcl csatlakoztatott APC (Automated Process Control) rendszer :<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>a m\u00e9r\u00e9si eredm\u00e9nyek val\u00f3s id\u0151ben t\u00f6rt\u00e9n\u0151 leolvas\u00e1sa,<\/li>\n\n\n\n<li>kisz\u00e1m\u00edtja a sz\u00fcks\u00e9ges korrekci\u00f3t,<\/li>\n\n\n\n<li>emberi beavatkoz\u00e1s n\u00e9lk\u00fcl m\u00f3dos\u00edthatja a g\u00e9p korrektorait.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">A m\u00e9r\u00e9s \u2192 d\u00f6nt\u00e9s \u2192 korrekci\u00f3s ciklus teljesen automatiz\u00e1lt. Az \u00fczemeltet\u0151 t\u00e1j\u00e9koztat\u00e1st kap, de nem kell beavatkoznia minden egyes korrekci\u00f3hoz. Ez a fajta rendszer a Ppk-t 1-n\u00e9l kisebb \u00e9rt\u00e9kr\u0151l 1,4 f\u00f6l\u00e9 tudja emelni, ami radik\u00e1lisan megv\u00e1ltoztatja a nem megfelel\u0151s\u00e9gek ar\u00e1ny\u00e1t.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Mennyibe ker\u00fcl val\u00f3j\u00e1ban a hullad\u00e9k?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A klasszikus hiba az, hogy a selejtet az anyagk\u00f6lts\u00e9gen sz\u00e1molj\u00e1k el. A val\u00f3s\u00e1g enn\u00e9l sokkal durv\u00e1bb.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A t\u00f6rmel\u00e9k tartalmazza :<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>az anyagk\u00f6lts\u00e9g,<\/li>\n\n\n\n<li>a g\u00e9p \u00e1ltal felhaszn\u00e1lt id\u0151,<\/li>\n\n\n\n<li>kezel\u0151i id\u0151,<\/li>\n\n\n\n<li>a felder\u00edt\u00e9s \u00e9s a v\u00e1logat\u00e1s k\u00f6lts\u00e9gei,<\/li>\n\n\n\n<li>a kezel\u00e9s k\u00f6lts\u00e9gei (ut\u00f3munka vagy selejt),<\/li>\n\n\n\n<li>\u00e9s bizonyos esetekben a k\u00e9sedelmes sz\u00e1ll\u00edt\u00e1s vagy a vev\u0151i panaszok k\u00f6lts\u00e9gei.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">A nagy hozz\u00e1adott \u00e9rt\u00e9kkel rendelkez\u0151 alkatr\u00e9szek eset\u00e9ben - ami gyakran el\u0151fordul a finommechanik\u00e1ban - ez a teljes k\u00f6lts\u00e9g ak\u00e1r 5-10-szerese is lehet az anyagk\u00f6lts\u00e9gnek. A selejt ar\u00e1ny\u00e1nak 4 %-r\u0151l 1,5 %-re t\u00f6rt\u00e9n\u0151 cs\u00f6kkent\u00e9se nagyon k\u00e9zzelfoghat\u00f3 megtakar\u00edt\u00e1st jelent, amely a mennyis\u00e9gt\u0151l f\u00fcgg\u0151en \u00e9vente t\u00f6bb t\u00edz- vagy sz\u00e1zezer eur\u00f3t is jelenthet.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Mit jelent az automatiz\u00e1l\u00e1s a kis sorozatgy\u00e1rt\u00e1sn\u00e1l<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A folyamatir\u00e1ny\u00edt\u00e1si rendszerek bevezet\u00e9s\u00e9nek gyakori akad\u00e1lya az alkatr\u00e9szsz\u00e1mok sokf\u00e9les\u00e9ge. Egy olyan m\u0171hely, amely \u00e9vente 2000 darabsz\u00e1m\u00fa alkatr\u00e9szt gy\u00e1rt kis sorozatban, nehezen tudja igazolni az egyes \u00faj alkatr\u00e9szekhez sz\u00fcks\u00e9ges hossz\u00fa be\u00e1ll\u00edt\u00e1si id\u0151t.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u00c9ppen ez\u00e9rt az automatikus konfigur\u00e1ci\u00f3gener\u00e1l\u00e1s a megmunk\u00e1l\u00f3 programb\u00f3l (CAM) jelent\u0151s megk\u00fcl\u00f6nb\u00f6ztet\u0151 t\u00e9nyez\u0151. Ha a rendszer a digit\u00e1lis tervb\u0151l automatikusan konfigur\u00e1l\u00f3dik, a referenci\u00e1nk\u00e9nti megval\u00f3s\u00edt\u00e1si k\u00f6lts\u00e9g meredeken cs\u00f6kken, \u00e9s a folyamatir\u00e1ny\u00edt\u00e1s el\u0151nyei m\u00e9g a legr\u00f6videbb gy\u00e1rt\u00e1si ciklusokn\u00e1l is el\u00e9rhet\u0151v\u00e9 v\u00e1lnak.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">K\u00f6vetkeztet\u00e9s: a megmunk\u00e1l\u00e1si selejt cs\u00f6kkent\u00e9se rendszerszint\u0171 megk\u00f6zel\u00edt\u00e9st ig\u00e9nyel<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A megmunk\u00e1l\u00e1si selejt kik\u00fcsz\u00f6b\u00f6l\u00e9s\u00e9re nincs csodamegold\u00e1s. Ami m\u0171k\u00f6dik, az olyan megk\u00f6zel\u00edt\u00e9s, amely a val\u00f3di okokat kezeli: a folyamat v\u00e1ltoz\u00e9konys\u00e1g\u00e1t, a kezdeti be\u00e1ll\u00edt\u00e1sokat, a m\u00e9r\u00e9sek megb\u00edzhat\u00f3s\u00e1g\u00e1t \u00e9s a besz\u00e1ll\u00edt\u00e1s ellen\u0151rz\u00e9s\u00e9t.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A statisztikai eszk\u00f6z\u00f6k \u00e9s az automatiz\u00e1lt vez\u00e9rl\u0151rendszerek ma m\u00e1r lehet\u0151v\u00e9 teszik azt, ami kor\u00e1bban egy szak\u00e9rt\u0151 feladata volt: a v\u00e1ltoz\u00e9konys\u00e1g elemz\u00e9se, az elt\u00e9r\u00e9sek felismer\u00e9se \u00e9s a g\u00e9p korrig\u00e1l\u00e1sa an\u00e9lk\u00fcl, hogy a g\u00e9pkezel\u0151 munkaterh\u00e9t n\u00f6veln\u00e9k.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A selejt cs\u00f6kkent\u00e9se a megmunk\u00e1l\u00e1sban el\u0151sz\u00f6r is azt jelenti, hogy el kell d\u00f6nteni, hogy helyesen m\u00e9rj\u00fck, mi t\u00f6rt\u00e9nik, majd az adatok alapj\u00e1n kell cselekedni.<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">GYIK - Gyakran ism\u00e9telt k\u00e9rd\u00e9sek a megmunk\u00e1l\u00e1si selejt cs\u00f6kkent\u00e9s\u00e9r\u0151l<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Milyen selejtar\u00e1nyt tartanak elfogadhat\u00f3nak a prec\u00edzi\u00f3s m\u00e9rn\u00f6ki tev\u00e9kenys\u00e9gben?<\/strong>&nbsp;Nincs \u00e1ltal\u00e1nos k\u00fcsz\u00f6b\u00e9rt\u00e9k, de a 2 % feletti \u00e9rt\u00e9k stabil sorozatokn\u00e1l \u00e1ltal\u00e1ban nem megfelel\u0151en szab\u00e1lyozott folyamatra utal. 1 % alatt a folyamat j\u00f3l m\u0171k\u00f6d\u0151nek tekinthet\u0151. Az alapvet\u0151 c\u00e9l az, hogy a v\u00e1ltoz\u00e9konys\u00e1g stabiliz\u00e1l\u00e1s\u00e1val a nulla hiba el\u00e9r\u00e9s\u00e9re t\u00f6rekedj\u00fcnk.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Mi a k\u00fcl\u00f6nbs\u00e9g a selejt \u00e9s az ut\u00f3munka k\u00f6z\u00f6tt?<\/strong>\u00a0Ha egy alkatr\u00e9sz selejtez\u00e9sre ker\u00fcl, akkor nem lehet megmenteni; visszamin\u0151s\u00edtik vagy selejtezik. Az \u00e1tdolgoz\u00e1s egy tov\u00e1bbi m\u0171velet seg\u00edts\u00e9g\u00e9vel hozza vissza az alkatr\u00e9szt a t\u0171r\u00e9shat\u00e1ron bel\u00fclre. Mindkett\u0151 k\u00f6lts\u00e9gekkel j\u00e1r, de az ut\u00f3munka gyakran elfed egy olyan folyamatprobl\u00e9m\u00e1t, amelyet a selejtez\u00e9s l\u00e1that\u00f3bb\u00e1 tesz.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>El\u00e9g az SPC a megmunk\u00e1l\u00e1si selejt cs\u00f6kkent\u00e9s\u00e9hez?<\/strong>\u00a0Az SPC egy felder\u00edt\u0151 eszk\u00f6z: m\u00e9g azel\u0151tt jelzi az elt\u00e9r\u00e9seket, miel\u0151tt azok nem megfelel\u0151s\u00e9geket eredm\u00e9nyezn\u00e9nek. A korrekci\u00f3kat azonban mindig el kell v\u00e9gezni, ak\u00e1r k\u00e9zzel, ak\u00e1r automatikusan. A gyors korrekci\u00f3s int\u00e9zked\u00e9sek n\u00e9lk\u00fcli SPC-nek csak korl\u00e1tozott hat\u00e1sa van. Az APC tov\u00e1bb megy, mivel a korrekci\u00f3t k\u00f6zvetlen\u00fcl a g\u00e9pen automatiz\u00e1lja.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Alkalmazhat\u00f3k-e ezek az eszk\u00f6z\u00f6k kis sorozatban?<\/strong>&nbsp;Igen, amennyiben a hivatkoz\u00e1ssal t\u00f6rt\u00e9n\u0151 konfigur\u00e1l\u00e1s gyors. Az olyan rendszerek, amelyek automatikusan konfigur\u00e1lj\u00e1k magukat a CAM-programb\u00f3l, drasztikusan cs\u00f6kkentik a bevezet\u00e9s k\u00f6lts\u00e9geit \u00faj alkatr\u00e9szenk\u00e9nt, \u00edgy a telep\u00edt\u00e9s m\u00e9g a rendk\u00edv\u00fcl v\u00e1ltozatos m\u0171helyekben is \u00e9letk\u00e9pes.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Hogyan lehet meggy\u0151zni a vezet\u0151s\u00e9get, hogy fektessen be a selejt cs\u00f6kkent\u00e9s\u00e9be?<\/strong>\u00a0A legegyszer\u0171bben bemutathat\u00f3 ROI a jelenlegi selejt t\u00e9nyleges k\u00f6lts\u00e9ge (anyag + g\u00e9pid\u0151 + v\u00e1logat\u00e1si id\u0151 + feldolgoz\u00e1s), megszorozva az \u00e9ves mennyis\u00e9ggel. Ennek az \u00f6sszegnek az \u00f6sszehasonl\u00edt\u00e1sa egy fejleszt\u00e9si projekt k\u00f6lts\u00e9g\u00e9vel \u00e1ltal\u00e1ban nagyon gyorsan igazolja a beruh\u00e1z\u00e1s megt\u00e9r\u00fcl\u00e9s\u00e9t, gyakran kevesebb, mint egy \u00e9v alatt.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>","protected":false},"excerpt":{"rendered":"<p>Dans un atelier de m\u00e9canique de pr\u00e9cision, chaque pi\u00e8ce non conforme co\u00fbte deux fois : une premi\u00e8re fois en mati\u00e8re et en temps machine, une deuxi\u00e8me fois en co\u00fbt de traitement (retouche, tri, ferraille, r\u00e9clamation client). Pourtant, beaucoup d&rsquo;ateliers acceptent encore un taux de rebut comme une fatalit\u00e9, l\u00e0 o\u00f9 il devrait \u00eatre un signal [&hellip;]<\/p>\n","protected":false},"author":4,"featured_media":4330,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[5],"tags":[],"class_list":["post-4329","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-apc"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.7 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>R\u00e9duire les rebuts en usinage : comprendre les causes pour agir efficacement - Ellistat<\/title>\n<meta name=\"description\" content=\"Taux de rebut trop \u00e9lev\u00e9 en usinage ? 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