{"id":30068,"date":"2026-01-09T10:26:41","date_gmt":"2026-01-09T02:26:41","guid":{"rendered":"https:\/\/sinoextrud.com\/?p=30068"},"modified":"2026-01-09T10:26:41","modified_gmt":"2026-01-09T02:26:41","slug":"pravidla-pro-navrhovani-minimalniho-polomeru-hlinikoveho-vylisku","status":"publish","type":"post","link":"https:\/\/sinoextrud.com\/cs\/aluminum-extrusion-minimum-radius-design-rules\/","title":{"rendered":"Pravidla pro navrhov\u00e1n\u00ed minim\u00e1ln\u00edho polom\u011bru hlin\u00edkov\u00e9ho v\u00fdlisku?"},"content":{"rendered":"

\"Hlin\u00edkov\u00fd
Hlin\u00edkov\u00fd v\u00fdlisek Hlin\u00edkov\u00e9 hrany pro kabiny karoseri\u00ed n\u00e1kladn\u00edch automobil\u016f Profily<\/figcaption><\/figure>\n<\/p>\n

Hlin\u00edkov\u00e9 profily \u010dasto selh\u00e1vaj\u00ed ji\u017e p\u0159i v\u00fdrob\u011b, proto\u017ee polom\u011bry roh\u016f byly odhadnuty, nikoli navr\u017eeny. Toto riziko stoj\u00ed \u010das, n\u00e1stroje a d\u016fv\u011bru.<\/p>\n

Minim\u00e1ln\u00ed polom\u011br u vytla\u010dov\u00e1n\u00ed hlin\u00edku z\u00e1vis\u00ed na slitin\u011b, tlou\u0161\u0165ce st\u011bny a pr\u016ftoku profilu a mus\u00ed b\u00fdt dostate\u010dn\u011b velk\u00fd, aby umo\u017enil pohyb kovu bez trh\u00e1n\u00ed nebo vzniku nap\u011bt\u00ed.<\/strong><\/p>\n

Mnoho kupuj\u00edc\u00edch si mysl\u00ed, \u017ee pravidla pro polom\u011bry jsou jednoduch\u00e1 \u010d\u00edsla. Nen\u00ed tomu tak. Polom\u011br je v\u00fdsledek syst\u00e9mu. Vych\u00e1z\u00ed z toku kovu, pevnosti matrice a kone\u010dn\u00e9ho pou\u017eit\u00ed. Tento \u010dl\u00e1nek vysv\u011btluje pravidla jednoduch\u00fdm zp\u016fsobem na z\u00e1klad\u011b toho, co vid\u00edme ka\u017ed\u00fd den v d\u00edln\u011b.<\/p>\n

Jak\u00fd je minim\u00e1ln\u00ed polom\u011br ohybu pro extrudovan\u00fd hlin\u00edk?<\/h2>\n

Kr\u00e1tk\u00e9 polom\u011bry vypadaj\u00ed na v\u00fdkresech \u010dist\u011b, ale jsou hlavn\u00ed p\u0159\u00ed\u010dinou prask\u00e1n\u00ed matric a selh\u00e1n\u00ed profil\u016f.<\/p>\n

U v\u011bt\u0161iny vytla\u010dovan\u00fdch hlin\u00edkov\u00fdch profil\u016f by m\u011bl b\u00fdt vnit\u0159n\u00ed polom\u011br rohu minim\u00e1ln\u011b 0,5 a\u017e 1,5n\u00e1sobek tlou\u0161\u0165ky st\u011bny, v z\u00e1vislosti na slitin\u011b a tvaru profilu.<\/strong><\/p>\n

\"Hlin\u00edkov\u00e9
Hlin\u00edkov\u00e9 vytla\u010dovac\u00ed pouzdro<\/figcaption><\/figure>\n<\/p>\n

Kdy\u017e se konstrukt\u00e9\u0159i ptaj\u00ed na minim\u00e1ln\u00ed polom\u011br ohybu, \u010dasto sm\u011b\u0161uj\u00ed pravidla pro oh\u00fdb\u00e1n\u00ed s pravidly pro vytla\u010dov\u00e1n\u00ed. Vytla\u010dov\u00e1n\u00ed nen\u00ed oh\u00fdb\u00e1n\u00ed plech\u016f. Hlin\u00edk je protla\u010dov\u00e1n lisovac\u00edm za\u0159\u00edzen\u00edm jako m\u011bkk\u00e1 hmota. Te\u010de. Rohy tento tok usm\u011br\u0148uj\u00ed. Pokud je roh p\u0159\u00edli\u0161 ostr\u00fd, kov se nevypln\u00ed rovnom\u011brn\u011b.<\/p>\n

Jak funguje polom\u011br p\u0159i vytla\u010dov\u00e1n\u00ed<\/h3>\n

Uvnit\u0159 matrice se hlin\u00edk p\u0159esouv\u00e1 z n\u00e1doby do \u00fazk\u00fdch kan\u00e1lk\u016f. V roz\u00edch se rychlost proud\u011bn\u00ed m\u011bn\u00ed. Ostr\u00fd roh zpomaluje kov na vnit\u0159n\u00ed hran\u011b. Vn\u011bj\u0161\u00ed hrana se pohybuje rychleji. Vznik\u00e1 tak nap\u011bt\u00ed a tepeln\u00e9 rozd\u00edly.<\/p>\n

Pokud je polom\u011br p\u0159\u00edli\u0161 mal\u00fd, doch\u00e1z\u00ed ke t\u0159em situac\u00edm:<\/p>\n

    \n
  • Roh se zcela nevypln\u00ed<\/li>\n
  • Objevuj\u00ed se povrchov\u00e9 linie<\/li>\n
  • Mikrotrhliny vznikaj\u00ed pod nap\u011bt\u00edm<\/li>\n<\/ul>\n

    Tyto vady se zpo\u010d\u00e1tku nemus\u00ed projevit. Objev\u00ed se pozd\u011bji p\u0159i eloxov\u00e1n\u00ed, obr\u00e1b\u011bn\u00ed nebo mont\u00e1\u017ei.<\/p>\n

    Spole\u010dn\u00e9 pokyny pro minim\u00e1ln\u00ed polom\u011br<\/h3>\n

    Na z\u00e1klad\u011b v\u00fdrobn\u00edch \u00fadaj\u016f se jedn\u00e1 o bezpe\u010dn\u00e9 v\u00fdchoz\u00ed body:<\/p>\n\n\n\n\n\n\n\n\n
    Tlou\u0161\u0165ka st\u011bny (mm)<\/th>\nDoporu\u010den\u00fd vnit\u0159n\u00ed polom\u011br (mm)<\/th>\n<\/tr>\n<\/thead>\n
    1.0 - 1.5<\/td>\n0.8 - 1.2<\/td>\n<\/tr>\n
    1.6 - 2.5<\/td>\n1.2 - 2.5<\/td>\n<\/tr>\n
    2.6 - 4.0<\/td>\n2.0 - 4.0<\/td>\n<\/tr>\n
    > 4.0<\/td>\n>= tlou\u0161\u0165ka st\u011bny<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

    Nejedn\u00e1 se o p\u0159\u00edsn\u00e9 limity. Jsou to pracovn\u00ed pravidla, kter\u00e1 vyva\u017euj\u00ed \u017eivotnost matrice, kvalitu povrchu a n\u00e1klady.<\/p>\n

    Vnit\u0159n\u00ed vs. vn\u011bj\u0161\u00ed polom\u011br<\/h3>\n

    Vnit\u0159n\u00ed polom\u011br m\u00e1 v\u011bt\u0161\u00ed v\u00fdznam ne\u017e vn\u011bj\u0161\u00ed polom\u011br. Vn\u011bj\u0161\u00ed rohy mohou vypadat ost\u0159e, i kdy\u017e je vnit\u0159n\u00ed polom\u011br velk\u00fd. To je kl\u00ed\u010dov\u00fd konstruk\u010dn\u00ed trik.<\/p>\n

    \u010casto doporu\u010dujeme zachovat velk\u00fd vnit\u0159n\u00ed polom\u011br a v p\u0159\u00edpad\u011b pot\u0159eby ostr\u00e9ho vzhledu pou\u017e\u00edt mal\u00e9 vn\u011bj\u0161\u00ed zkosen\u00ed nebo dodate\u010dn\u00e9 obr\u00e1b\u011bn\u00ed.<\/p>\n

    Skute\u010dn\u00fd dopad na v\u00fdrobu<\/h3>\n

    Kdy\u017e je polom\u011br p\u0159\u00edli\u0161 mal\u00fd:<\/p>\n

      \n
    • Prodlou\u017een\u00ed doby le\u0161t\u011bn\u00ed matrice<\/li>\n
    • Pokles rychlosti vytla\u010dov\u00e1n\u00ed<\/li>\n
    • \u0160rotovn\u00e9 se zvy\u0161uje<\/li>\n
    • Doba dod\u00e1n\u00ed se prodlu\u017euje<\/li>\n<\/ul>\n

      V re\u00e1ln\u00fdch projektech se p\u0159i zv\u011bt\u0161en\u00ed polom\u011bru o pouh\u00fdch 0,5 mm \u010dasto sn\u00ed\u017e\u00ed po\u010det vad o v\u00edce ne\u017e polovinu.<\/p>\n

      <\/svg> Minim\u00e1ln\u00ed vnit\u0159n\u00ed polom\u011br rohu u hlin\u00edkov\u00fdch v\u00fdlisk\u016f obvykle souvis\u00ed sp\u00ed\u0161e s tlou\u0161\u0165kou st\u011bny ne\u017e s celkovou velikost\u00ed profilu.<\/b>Pravda<\/span><\/p>

      Nap\u011bt\u00ed p\u0159i proud\u011bn\u00ed kovu se koncentruje na tenk\u00fdch st\u011bn\u00e1ch, tak\u017ee tlou\u0161\u0165ka st\u011bny ur\u010duje, jak mal\u00fd m\u016f\u017ee b\u00fdt polom\u011br bez defekt\u016f.<\/p><\/div>\n

      <\/svg> Pokud je slitina dostate\u010dn\u011b m\u011bkk\u00e1, lze bezpe\u010dn\u011b vytla\u010dit vnit\u0159n\u00ed roh s nulov\u00fdm polom\u011brem.<\/b>False<\/span><\/p>

      Rohy s nulov\u00fdm polom\u011brem blokuj\u00ed tok kovu a t\u00e9m\u011b\u0159 v\u017edy zp\u016fsobuj\u00ed praskliny, z\u00e1hyby nebo selh\u00e1n\u00ed matrice bez ohledu na m\u011bkkost slitiny.<\/p><\/div>\n

      Jak ovliv\u0148uje tlou\u0161\u0165ka st\u011bny a slitina mezn\u00ed polom\u011br?<\/h2>\n

      Design\u00e9\u0159i se \u010dasto zam\u011b\u0159uj\u00ed na tvar, ale tlou\u0161\u0165ka a slitina rozhoduj\u00ed o tom, co je mo\u017en\u00e9.<\/p>\n

      Siln\u011bj\u0161\u00ed st\u011bny umo\u017e\u0148uj\u00ed v\u011bt\u0161\u00ed rozlo\u017een\u00ed nap\u011bt\u00ed a men\u0161\u00ed relativn\u00ed polom\u011br, zat\u00edmco tvrd\u0161\u00ed slitiny pot\u0159ebuj\u00ed v\u011bt\u0161\u00ed polom\u011bry, aby se zabr\u00e1nilo vzniku trhlin a nerovnov\u00e1ze proud\u011bn\u00ed.<\/strong><\/p>\n

      \"Hlin\u00edkov\u00e9
      Hlin\u00edkov\u00e9 oblo\u017een\u00ed Hlin\u00edkov\u00e9 oblo\u017een\u00ed Profil Wood Look Grain Hlin\u00edkov\u00e9 panely<\/figcaption><\/figure>\n<\/p>\n

      Tlou\u0161\u0165ka st\u011bny a slitina spolupracuj\u00ed. Nelze je posuzovat samostatn\u011b.<\/p>\n

      Vliv tlou\u0161\u0165ky st\u011bny<\/h3>\n

      Tenk\u00e9 st\u011bny se rychleji ochlazuj\u00ed a odol\u00e1vaj\u00ed proud\u011bn\u00ed. V roz\u00edch je tento odpor siln\u011bj\u0161\u00ed. Mal\u00fd polom\u011br na tenk\u00e9 st\u011bn\u011b vytv\u00e1\u0159\u00ed bod ucp\u00e1n\u00ed.<\/p>\n

      Kl\u00ed\u010dov\u00e9 post\u0159ehy z v\u00fdroby:<\/p>\n

        \n
      • Tenk\u00e9 st\u011bny vy\u017eaduj\u00ed v\u011bt\u0161\u00ed polom\u011bry<\/li>\n
      • Siln\u00e9 st\u011bny sn\u00e1\u0161ej\u00ed t\u011bsn\u011bj\u0161\u00ed oblouky<\/li>\n
      • Nerovnom\u011brn\u00e1 tlou\u0161\u0165ka zvy\u0161uje riziko<\/li>\n<\/ul>\n

        Jednotn\u00e1 tlou\u0161\u0165ka st\u011bny pom\u00e1h\u00e1 v\u00edce ne\u017e jak\u00e1koli jin\u00e1 konstruk\u010dn\u00ed zm\u011bna.<\/p>\n

        Rozd\u00edly ve slitin\u00e1ch v praxi<\/h3>\n

        Ne v\u0161echen hlin\u00edk se chov\u00e1 stejn\u011b. Zde je jednoduch\u00e9 srovn\u00e1n\u00ed:<\/p>\n\n\n\n\n\n\n\n\n
        Slitina<\/th>\nSchopnost proud\u011bn\u00ed<\/th>\nCitlivost polom\u011bru<\/th>\nTypick\u00e9 pou\u017eit\u00ed<\/th>\n<\/tr>\n<\/thead>\n
        6063<\/td>\nVysok\u00e1<\/td>\nN\u00edzk\u00e1<\/td>\nArchitektura<\/td>\n<\/tr>\n
        6061<\/td>\nSt\u0159edn\u00ed<\/td>\nSt\u0159edn\u00ed<\/td>\nStruktur\u00e1ln\u00ed<\/td>\n<\/tr>\n
        6005A<\/td>\nSt\u0159edn\u00ed<\/td>\nSt\u0159edn\u00ed<\/td>\nDoprava<\/td>\n<\/tr>\n
        7075<\/td>\nN\u00edzk\u00e1<\/td>\nVelmi vysok\u00e1<\/td>\nLetectv\u00ed a kosmonautika<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

        6063 plyne hladce. Snadno vypl\u0148uje rohy. 6061 je pevn\u011bj\u0161\u00ed, ale tu\u017e\u0161\u00ed. Pot\u0159ebuje v\u011bt\u0161\u00ed polom\u011bry.<\/p>\n

        Pro\u010d tvrd\u0161\u00ed slitiny pot\u0159ebuj\u00ed v\u011bt\u0161\u00ed polom\u011bry<\/h3>\n

        Tvrd\u00e9 slitiny odol\u00e1vaj\u00ed deformaci. P\u0159i vytla\u010dov\u00e1n\u00ed pot\u0159ebuj\u00ed k pohybu v\u011bt\u0161\u00ed tlak. V ostr\u00fdch roz\u00edch se tlak zvy\u0161uje. To vede k:<\/p>\n

          \n
        • Trhliny zp\u016fsoben\u00e9 pnut\u00edm v matrici<\/li>\n
        • Roztr\u017een\u00ed povrchu<\/li>\n
        • Kr\u00e1tk\u00e1 \u017eivotnost matrice<\/li>\n<\/ul>\n

          P\u0159i p\u0159echodu z 6063 na 6061 \u010dasto doporu\u010dujeme p\u0159idat o 30 a\u017e 50 procent v\u011bt\u0161\u00ed polom\u011br, i kdy\u017e tvar z\u016fstane stejn\u00fd.<\/p>\n

          Tlou\u0161\u0165ka a slitina dohromady<\/h3>\n

          Tenk\u00e1 st\u011bna v tvrd\u00e9 slitin\u011b je nejhor\u0161\u00ed p\u0159\u00edpad. Mnoho poruch poch\u00e1z\u00ed z t\u00e9to kombinace.<\/p>\n

          Dobr\u00fd design se \u0159\u00edd\u00ed t\u00edmto po\u0159ad\u00edm:<\/p>\n

            \n
          1. Zvolte slitinu pro funkci<\/li>\n
          2. Nastaven\u00ed minim\u00e1ln\u00ed tlou\u0161\u0165ky st\u011bny<\/li>\n
          3. Definujte polom\u011br rohu jako posledn\u00ed<\/li>\n<\/ol>\n

            P\u0159esko\u010den\u00ed tohoto po\u0159ad\u00ed vede k p\u0159epracov\u00e1n\u00ed n\u00e1vrhov\u00fdch smy\u010dek.<\/p>\n

            <\/svg> P\u0159echod z hlin\u00edku 6063 na 6061 obvykle vy\u017eaduje zv\u011bt\u0161en\u00ed rohov\u00fdch polom\u011br\u016f, aby byla zachov\u00e1na kvalita vytla\u010dov\u00e1n\u00ed.<\/b>Pravda<\/span><\/p>

            6061 m\u00e1 ni\u017e\u0161\u00ed schopnost proud\u011bn\u00ed, tak\u017ee v\u011bt\u0161\u00ed polom\u011bry sni\u017euj\u00ed nap\u011bt\u00ed a zlep\u0161uj\u00ed proud\u011bn\u00ed kovu.<\/p><\/div>\n

            <\/svg> Tlou\u0161\u0165ka st\u011bny m\u00e1 mal\u00fd vliv na minim\u00e1ln\u00ed polom\u011br rohu, pokud se sn\u00ed\u017e\u00ed rychlost vytla\u010dov\u00e1n\u00ed.<\/b>False<\/span><\/p>

            Sn\u00ed\u017een\u00ed rychlosti nem\u016f\u017ee pln\u011b kompenzovat blokov\u00e1n\u00ed pr\u016ftoku zp\u016fsoben\u00e9 tenk\u00fdmi st\u011bnami a ostr\u00fdmi rohy.<\/p><\/div>\n

            Mohou ostr\u00e9 rohy naru\u0161it celistvost profilu?<\/h2>\n

            Ostr\u00e9 rohy vypadaj\u00ed siln\u011b, ale \u010dasto skr\u00fdvaj\u00ed slabiny.<\/p>\n

            Ano, ostr\u00e9 vnit\u0159n\u00ed rohy vytv\u00e1\u0159ej\u00ed m\u00edsta koncentrace nap\u011bt\u00ed, kter\u00e1 sni\u017euj\u00ed \u00fanavovou \u017eivotnost a zvy\u0161uj\u00ed riziko vzniku trhlin p\u0159i zat\u00ed\u017een\u00ed a zm\u011bn\u011b teploty.<\/strong><\/p>\n

            \"Zak\u00e1zkov\u00e1
            Zak\u00e1zkov\u00e1 \u00faprava hlin\u00edkov\u00fdch vytla\u010dovac\u00edch profil\u016f a CNC obr\u00e1b\u011bn\u00ed<\/figcaption><\/figure>\n<\/p>\n

            Integrita profilu nen\u00ed jen o pevnosti na pap\u00ed\u0159e. Jde o to, jak se profil chov\u00e1 po vytla\u010den\u00ed, opracov\u00e1n\u00ed a pou\u017eit\u00ed.<\/p>\n

            Koncentrace nap\u011bt\u00ed vysv\u011btlena jednodu\u0161e<\/h3>\n

            Nap\u011bt\u00ed proud\u00ed materi\u00e1lem jako voda potrub\u00edm. Ostr\u00e9 rohy se chovaj\u00ed jako n\u00e1hl\u00e9 ohyby. V rohu se vytv\u00e1\u0159\u00ed tlak.<\/p>\n

            To zp\u016fsobuje:<\/p>\n

              \n
            • M\u00edstn\u00ed v\u00fdt\u011b\u017enost<\/li>\n
            • Iniciace mikrotrhlin<\/li>\n
            • \u010casn\u00e9 \u00fanavov\u00e9 selh\u00e1n\u00ed<\/li>\n<\/ul>\n

              Mal\u00fd polom\u011br rozkl\u00e1d\u00e1 nap\u011bt\u00ed na v\u011bt\u0161\u00ed plochu.<\/p>\n

              Dopad p\u0159i sekund\u00e1rn\u00edm zpracov\u00e1n\u00ed<\/h3>\n

              Mnoho profil\u016f je pozd\u011bj\u0161\u00edch:<\/p>\n

                \n
              • CNC obr\u00e1b\u011bn\u00e9<\/li>\n
              • Vrtan\u00e9<\/li>\n
              • Sva\u0159ovan\u00e9<\/li>\n
              • Eloxovan\u00e9<\/li>\n<\/ul>\n

                Ostr\u00e9 rohy umoc\u0148uj\u00ed probl\u00e9my ve v\u0161ech t\u011bchto kroc\u00edch.<\/p>\n

                P\u0159i eloxov\u00e1n\u00ed p\u0159itahuj\u00ed ostr\u00e9 rohy vy\u0161\u0161\u00ed proudovou hustotu. To vede k barevn\u00fdm odchylk\u00e1m a vyp\u00e1len\u00fdm stop\u00e1m.<\/p>\n

                P\u0159i sva\u0159ov\u00e1n\u00ed se v roz\u00edch shroma\u017e\u010fuje teplo. To zvy\u0161uje riziko deformace.<\/p>\n

                P\u0159\u00edklady selh\u00e1n\u00ed v ter\u00e9nu<\/h3>\n

                U nosn\u00fdch r\u00e1m\u016f se \u010dasto setk\u00e1v\u00e1me s prasklinami, kter\u00e9 za\u010d\u00ednaj\u00ed v ostr\u00fdch vnit\u0159n\u00edch roz\u00edch, nikoli v rovn\u00fdch \u010d\u00e1stech. I kdy\u017e v\u00fdpo\u010dty projdou, skute\u010dn\u00e9 pou\u017e\u00edv\u00e1n\u00ed odhal\u00ed slab\u00e1 m\u00edsta.<\/p>\n

                Polom\u011br jako pevnostn\u00ed prvek<\/h3>\n

                P\u0159id\u00e1n\u00edm polom\u011bru se konstrukce neoslab\u00ed. \u010casto ho naopak posiluje.<\/p>\n

                Mezi v\u00fdhody pat\u0159\u00ed:<\/p>\n

                  \n
                • Lep\u0161\u00ed odolnost proti \u00fanav\u011b<\/li>\n
                • Stabiln\u011bj\u0161\u00ed povrchov\u00e1 \u00faprava<\/li>\n
                • Del\u0161\u00ed \u017eivotnost<\/li>\n<\/ul>\n

                  Design\u00e9\u0159i se n\u011bkdy ob\u00e1vaj\u00ed, \u017ee polom\u011br zmen\u0161\u00ed prostor. Ve v\u011bt\u0161in\u011b p\u0159\u00edpad\u016f je zm\u011bna mal\u00e1 a zisk velk\u00fd.<\/p>\n

                  Vizu\u00e1ln\u00ed ostrost vs. struktur\u00e1ln\u00ed zdrav\u00ed<\/h3>\n

                  Profil m\u016f\u017ee vypadat ost\u0159e, ani\u017e by byl ostr\u00fd uvnit\u0159. To je kl\u00ed\u010dov\u00e1 my\u0161lenka.<\/p>\n

                  Vnit\u0159n\u00ed polom\u011br chr\u00e1n\u00ed integritu. Vn\u011bj\u0161\u00ed proveden\u00ed kontroluje vzhled.<\/p>\n

                  <\/svg> Ostr\u00e9 vnit\u0159n\u00ed rohy zvy\u0161uj\u00ed koncentraci nap\u011bt\u00ed a sni\u017euj\u00ed \u00fanavovou \u017eivotnost lisovan\u00fdch hlin\u00edkov\u00fdch profil\u016f.<\/b>Pravda<\/span><\/p>

                  Nap\u011bt\u00ed se koncentruje p\u0159i prudk\u00fdch zm\u011bn\u00e1ch geometrie, co\u017e urychluje iniciaci trhlin p\u0159i cyklick\u00e9m zat\u00ed\u017een\u00ed.<\/p><\/div>\n

                  <\/svg> Vn\u011bj\u0161\u00ed ostr\u00e9 rohy jsou z hlediska pevnosti profilu nebezpe\u010dn\u011bj\u0161\u00ed ne\u017e vnit\u0159n\u00ed ostr\u00e9 rohy.<\/b>False<\/span><\/p>

                  Vnit\u0159n\u00ed rohy jsou konstruk\u010dn\u011b v\u00edce nam\u00e1h\u00e1ny a jsou pro integritu kriti\u010dt\u011bj\u0161\u00ed ne\u017e vn\u011bj\u0161\u00ed hrany.<\/p><\/div>\n

                  Jsou k dispozici konstruk\u010dn\u00ed normy pro polom\u011bry roh\u016f?<\/h2>\n

                  Mnoho n\u00e1vrh\u00e1\u0159\u016f hled\u00e1 jedno standardn\u00ed \u010d\u00edslo. Takov\u00e9 \u010d\u00edslo neexistuje.<\/p>\n

                  Neexistuje \u017e\u00e1dn\u00e1 univerz\u00e1ln\u00ed norma pro minim\u00e1ln\u00ed polom\u011br, ale pr\u016fmyslov\u00e9 sm\u011brnice od asociac\u00ed a v\u00fdrobc\u016f vytla\u010dovac\u00edch stroj\u016f poskytuj\u00ed bezpe\u010dn\u00e1 konstruk\u010dn\u00ed rozmez\u00ed.<\/strong><\/p>\n

                  \"Velk\u00e9
                  Velk\u00e9 hlin\u00edkov\u00e9 v\u00fdlisky<\/figcaption><\/figure>\n<\/p>\n

                  Normy ud\u00e1vaj\u00ed sm\u011br, nikoli z\u00e1ruky.<\/p>\n

                  B\u011b\u017en\u00e9 referen\u010dn\u00ed zdroje<\/h3>\n

                  N\u00e1vrh\u00e1\u0159i \u010dasto konzultuj\u00ed:<\/p>\n

                    \n
                  • P\u0159\u00edru\u010dky pro navrhov\u00e1n\u00ed hlin\u00edkov\u00fdch v\u00fdlisk\u016f<\/li>\n
                  • Pr\u016fvodce schopnostmi dodavatele<\/li>\n
                  • \u00dadaje o testech specifick\u00fdch pro projekt<\/li>\n<\/ul>\n

                    Tyto dokumenty se shoduj\u00ed na principech, nikoli na p\u0159esn\u00fdch hodnot\u00e1ch.<\/p>\n

                    Typick\u00e1 orienta\u010dn\u00ed rozmez\u00ed<\/h3>\n

                    V\u011bt\u0161ina pr\u016fvodc\u016f doporu\u010duje:<\/p>\n

                      \n
                    • Vnit\u0159n\u00ed polom\u011br >= 0,5 x tlou\u0161\u0165ka st\u011bny pro m\u011bkk\u00e9 slitiny<\/li>\n
                    • Vnit\u0159n\u00ed polom\u011br >= 1,0 x tlou\u0161\u0165ka st\u011bny pro konstruk\u010dn\u00ed slitiny<\/li>\n
                    • V\u011bt\u0161\u00ed polom\u011bry pro dut\u00e9 a tenk\u00e9 profily<\/li>\n<\/ul>\n

                      Tyto rozsahy chr\u00e1n\u00ed v\u00fdrobek i n\u00e1stroje.<\/p>\n

                      Pro\u010d jsou normy st\u00e1le flexibiln\u00ed<\/h3>\n

                      Podm\u00ednky vytla\u010dov\u00e1n\u00ed se li\u0161\u00ed:<\/p>\n

                        \n
                      • Velikost tisku<\/li>\n
                      • Konstrukce matrice<\/li>\n
                      • Zp\u016fsob chlazen\u00ed<\/li>\n
                      • Rychlost v\u00fdroby<\/li>\n<\/ul>\n

                        Polom\u011br, kter\u00fd funguje na jednom lisu, m\u016f\u017ee na jin\u00e9m selhat. Proto z\u00e1le\u017e\u00ed na zku\u0161enostech.<\/p>\n

                        Jak uplat\u0148ujeme normy v re\u00e1ln\u00fdch projektech<\/h3>\n

                        Za\u010d\u00edn\u00e1me pokyny. Pot\u00e9 simulujeme tok. Pot\u00e9 uprav\u00edme na z\u00e1klad\u011b rizika.<\/p>\n

                        U velkoobjemov\u00fdch projekt\u016f v\u017edy vol\u00edme konzervativn\u00ed polom\u011bry. U prototyp\u016f m\u016f\u017eeme testovat limity.<\/p>\n

                        Osv\u011bd\u010den\u00e9 postupy pro n\u00e1kup\u010d\u00ed a n\u00e1vrh\u00e1\u0159e<\/h3>\n

                        Nejbezpe\u010dn\u011bj\u0161\u00ed p\u0159\u00edstup je jednoduch\u00fd:<\/p>\n

                          \n
                        • V\u010dasn\u00e9 sd\u00edlen\u00ed z\u00e1t\u011b\u017ee a podm\u00ednek pou\u017eit\u00ed<\/li>\n
                        • P\u0159ij\u00edm\u00e1n\u00ed zp\u011btn\u00e9 vazby o polom\u011bru od extrud\u00e9ru<\/li>\n
                        • Polom\u011br z\u00e1mku p\u0159ed v\u00fdsekem<\/li>\n<\/ul>\n

                          Nejv\u00edce stoj\u00ed pozdn\u00ed zm\u011bny polom\u011bru.<\/p>\n

                          <\/svg> Neexistuje jednotn\u00e1 celosv\u011btov\u00e1 norma, kter\u00e1 by definovala jeden minim\u00e1ln\u00ed polom\u011br rohu pro v\u0161echny hlin\u00edkov\u00e9 v\u00fdlisky.<\/b>Pravda<\/span><\/p>

                          V\u00fdsledky vytla\u010dov\u00e1n\u00ed z\u00e1vis\u00ed na slitin\u011b, tlou\u0161\u0165ce st\u011bny, konstrukci matrice a mo\u017enostech lisu.<\/p><\/div>\n

                          <\/svg> Dodr\u017eov\u00e1n\u00ed zve\u0159ejn\u011bn\u00e9ho polom\u011bru sm\u011brnice v\u017edy zaru\u010duje vytla\u010dov\u00e1n\u00ed bez vad.<\/b>False<\/span><\/p>

                          Pokyny sni\u017euj\u00ed riziko, ale nemohou nahradit hodnocen\u00ed a testov\u00e1n\u00ed konkr\u00e9tn\u00edho projektu.<\/p><\/div>\n

                          Z\u00e1v\u011br<\/h2>\n

                          N\u00e1vrh minim\u00e1ln\u00edho polom\u011bru nen\u00ed jen odhad. Je to rovnov\u00e1ha mezi slitinou, tlou\u0161\u0165kou st\u011bny a pr\u016ftokem. Respektov\u00e1n\u00ed t\u011bchto pravidel chr\u00e1n\u00ed pevnost, kvalitu povrchu a dodac\u00ed lh\u016fty.<\/p>","protected":false},"excerpt":{"rendered":"

                          Aluminum Extrusion Aluminum Edge Trim For Truck Body Cabins Profiles Aluminum profiles often fail late in production because corner radii were guessed, not designed. That risk costs time, tools, and trust. The minimum radius in aluminum extrusion depends on alloy, wall thickness, and profile flow, and it must be large enough to let metal move […]<\/p>\n","protected":false},"author":6,"featured_media":6672,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_seopress_robots_primary_cat":"none","_seopress_titles_title":"","_seopress_titles_desc":"","_seopress_robots_index":"","footnotes":""},"categories":[1],"tags":[],"class_list":["post-30068","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-custom-mold"],"meta_box":{"post-to-quiz_to":[]},"_links":{"self":[{"href":"https:\/\/sinoextrud.com\/cs\/wp-json\/wp\/v2\/posts\/30068","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/sinoextrud.com\/cs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/sinoextrud.com\/cs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/sinoextrud.com\/cs\/wp-json\/wp\/v2\/users\/6"}],"replies":[{"embeddable":true,"href":"https:\/\/sinoextrud.com\/cs\/wp-json\/wp\/v2\/comments?post=30068"}],"version-history":[{"count":0,"href":"https:\/\/sinoextrud.com\/cs\/wp-json\/wp\/v2\/posts\/30068\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/sinoextrud.com\/cs\/wp-json\/wp\/v2\/media\/6672"}],"wp:attachment":[{"href":"https:\/\/sinoextrud.com\/cs\/wp-json\/wp\/v2\/media?parent=30068"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/sinoextrud.com\/cs\/wp-json\/wp\/v2\/categories?post=30068"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/sinoextrud.com\/cs\/wp-json\/wp\/v2\/tags?post=30068"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}