{"id":2045,"date":"2021-05-19T05:25:35","date_gmt":"2021-05-19T05:25:35","guid":{"rendered":"https:\/\/saq0hpur0o.wpdns.site\/?p=2045"},"modified":"2021-07-15T04:00:49","modified_gmt":"2021-07-15T04:00:49","slug":"all-you-need-to-know-about-sheet-metal-flame-correction","status":"publish","type":"post","link":"https:\/\/hecter.cn\/cs\/all-you-need-to-know-about-sheet-metal-flame-correction\/","title":{"rendered":"V\u0161e, co pot\u0159ebujete v\u011bd\u011bt o korekci plamene plechu"},"content":{"rendered":"

<\/span>P\u0159edpokl\u00e1dan\u00e1 doba \u010dten\u00ed: <\/span>12<\/span> minut<\/span><\/p>\n\n\n\n

P\u0159i tepeln\u00e9 korekci plech<\/a>, nejpou\u017e\u00edvan\u011bj\u0161\u00ed je korekce plamenem oxyacetylenu. Korekce plamenem se nepou\u017e\u00edv\u00e1 pouze p\u0159i p\u0159\u00edprav\u011b materi\u00e1l\u016f, ale m\u016f\u017ee b\u00fdt tak\u00e9 pou\u017eita ke korekci deformace struktury ve v\u00fdrobn\u00edm procesu. Proto\u017ee je korekce plamene pohodln\u00e1 a flexibiln\u00ed, n\u00e1klady jsou n\u00edzk\u00e9, tak\u017ee se \u0161iroce pou\u017e\u00edv\u00e1.<\/p>\n\n\n\n

Fyzik\u00e1ln\u00ed vlastnosti plechov\u00fdch materi\u00e1l\u016f maj\u00ed tepeln\u00e9 smr\u0161\u0165ov\u00e1n\u00ed za studena smr\u0161\u0165ov\u00e1n\u00ed, p\u0159i lok\u00e1ln\u00edm oh\u0159evu se zah\u0159\u00edvan\u00fd materi\u00e1l zah\u0159\u00edv\u00e1 a nafukuje, ale vzhledem k okoln\u00edm materi\u00e1l\u016fm s n\u00edzkou teplotou, proto br\u00e1n\u00ed, oh\u0159evu kovu tlakov\u00fdm nap\u011bt\u00edm, kdy\u017e je teplota oh\u0159evu 600 - 700 \u2103, tlakov\u00e9 nap\u011bt\u00ed p\u0159ekra\u010duje mez kluzu materi\u00e1lu p\u0159i teplot\u011b, produkuje kompresn\u00ed deformaci. Kdy\u017e je oh\u0159ev zastaven, kov ochlazuje a zkracuje se. V d\u016fsledku toho jsou kovov\u00e1 vl\u00e1kna v m\u00edst\u011b oh\u0159evu krat\u0161\u00ed ne\u017e p\u016fvodn\u00ed, co\u017e vytv\u00e1\u0159\u00ed novou deformaci. Korekce plamenem m\u00e1 opravit p\u016fvodn\u00ed deformaci pomoc\u00ed nov\u00e9 deformace zp\u016fsoben\u00e9 lok\u00e1ln\u00edm zah\u0159\u00edv\u00e1n\u00edm kovu. Proto je kl\u00ed\u010dem zvl\u00e1dnout korekci plamene, abychom porozum\u011bli z\u00e1konu deformace zp\u016fsoben\u00e9mu lok\u00e1ln\u00edm oh\u0159evem plamene.<\/p>\n\n\n\n

N\u00e1sleduj\u00edc\u00ed obr\u00e1zek ukazuje deformaci ocelov\u00e9ho plechu, \u00fahlov\u00e9 oceli a T-oceli b\u011bhem a po zah\u0159\u00e1t\u00ed. Proto\u017ee by kovov\u00e9 vl\u00e1kno v oh\u0159\u00edvac\u00ed oblasti m\u011blo b\u00fdt po ochlazen\u00ed zkr\u00e1ceno, ocelov\u00e1 \u010d\u00e1st je ohnuta a deformov\u00e1na sm\u011brem k oh\u0159\u00edvac\u00ed stran\u011b.<\/p>\n\n\n\n

P\u0159i korekci plamene mus\u00ed b\u00fdt deformace zp\u016fsoben\u00e1 zah\u0159\u00e1t\u00edm v opa\u010dn\u00e9m sm\u011bru ne\u017e p\u016fvodn\u00ed deformace, aby se kompenzovala p\u016fvodn\u00ed deformace a byla opravena.<\/p>\n\n\n\n

Zdrojem tepla pro korekci plamenem je obvykle plamen kysl\u00edk-acetylen \uff0c, proto\u017ee teplota rychl\u00e9ho plamene kysl\u00edk-B je vysok\u00e1 a rychlost oh\u0159evu je vysok\u00e1.<\/p>\n\n\n\n

\"Deformace
Deformace p\u0159i oh\u0159evu ocelov\u00fdch profil\u016f<\/figcaption><\/figure><\/div>\n\n\n\n

Provozn\u00ed metoda opravy plamene<\/a><\/strong><\/h3>\n\n\n\n

Korekce plamene je ru\u010dn\u00ed operace, mus\u00ed b\u00fdt zalo\u017eena na deformaci obrobku, \u0159\u00eddit polohu oh\u0159evu plamene, \u010das, teplotu a dal\u0161\u00ed aspekty, aby se dos\u00e1hlo lep\u0161\u00edho efektu korekce. R\u016fzn\u00e9 polohy oh\u0159evu mohou korigovat deformaci v r\u016fzn\u00fdch sm\u011brech a poloha oh\u0159evu by m\u011bla b\u00fdt zvolena v del\u0161\u00ed \u010d\u00e1sti kovov\u00e9ho vl\u00e1kna, tj. Vn\u011b ohybov\u00e9 deformace materi\u00e1lu. Krom\u011b toho m\u00e1 tvar topn\u00e9 oblasti na zah\u0159\u00e1t\u00e9m obrobku velk\u00fd vliv na sm\u011br a velikost deformace korigovan\u00e9ho obrobku a sm\u011br nejv\u011bt\u0161\u00edho rozd\u00edlu d\u00e9lky vl\u00e1ken oh\u0159\u00edvac\u00ed oblast\u00ed na opraven\u00e9m obrobku ve sm\u011bru nejv\u011bt\u0161\u00ed ohybov\u00e1 deformace obrobku.<\/p>\n\n\n\n

Velikost deformace je \u00fam\u011brn\u00e1 rozd\u00edlu d\u00e9lky v topn\u00e9 z\u00f3n\u011b. S r\u016fzn\u00fdm plamenn\u00fdm teplem m\u016f\u017eete z\u00edskat r\u016fzn\u00e9 schopnosti korigovat deformaci. Pokud je teplo plamene nedostate\u010dn\u00e9, prodlou\u017e\u00ed se doba oh\u0159evu, roz\u0161\u00ed\u0159\u00ed se rozsah oh\u0159evu a zmen\u0161\u00ed se deforma\u010dn\u00ed rozd\u00edl mezi rovnob\u011b\u017en\u00fdmi vl\u00e1kny, tak\u017ee nen\u00ed snadn\u00e9 narovnat, tak\u017ee \u010d\u00edm vy\u0161\u0161\u00ed je rychlost oh\u0159evu, koncentrovan\u011bj\u0161\u00ed teplo, t\u00edm siln\u011bj\u0161\u00ed je korek\u010dn\u00ed schopnost a t\u00edm v\u011bt\u0161\u00ed je korek\u010dn\u00ed deformace.<\/p>\n\n\n\n

P\u0159i korekci plamene na n\u00edzkouhl\u00edkovou ocel a oby\u010dejnou n\u00edzkolegovanou ocel se \u010dasto pou\u017e\u00edv\u00e1 teplota oh\u0159evu 600-80 \u2103. Obecn\u00e1 teplota oh\u0159evu by nem\u011bla p\u0159ekro\u010dit 850 \u2103, aby nedo\u0161lo k p\u0159eh\u0159\u00e1t\u00ed kovu p\u0159i zah\u0159\u00edv\u00e1n\u00ed, ale teplota oh\u0159evu nem\u016f\u017ee b\u00fdt p\u0159\u00edli\u0161 n\u00edzk\u00e1, proto\u017ee \u00fa\u010dinnost korekce nen\u00ed vysok\u00e1, kdy\u017e je teplota p\u0159\u00edli\u0161 n\u00edzk\u00e1. Teplotu oh\u0159evu lze zhruba posoudit podle barvy oh\u0159\u00edvan\u00e9ho povrchu oceli ve v\u00fdrob\u011b a jej\u00ed p\u0159esnost souvis\u00ed se zku\u0161enostmi, jak ukazuje tabulka.<\/p>\n\n\n\n

Barva<\/td>Teplota \/\u2103<\/td>Barva<\/td>Teplota \/\u2103<\/td><\/tr>
Tmav\u011b ka\u0161tanov\u00e9<\/td>550-580<\/td>Sv\u011btl\u00e1 fuchsie<\/td>830-900<\/td><\/tr>
Ka\u0161tanov\u00e1<\/td>580-650<\/td>oran\u017eov\u00fd<\/td>900-1050<\/td><\/tr>
Tmav\u00e1 fuchsie<\/td>650-730<\/td>Tmav\u011b \u017elut\u00e1<\/td>1050-1150<\/td><\/tr>
Hlubok\u00e1 fuchsie<\/td>730-770<\/td>Sv\u011btle \u017elut\u00e1<\/td>1150-1250<\/td><\/tr>
Fuchsie<\/td>770-800<\/td>B\u00edl\u00e1 \u017elut\u00e1<\/td>1250-1300<\/td><\/tr>
Sv\u011btl\u00e1 fuchsie<\/td>800-830<\/td><\/td><\/td><\/tr><\/tbody><\/table>
Teplota povrchu oceli a teplota st\u00ednu (pozorov\u00e1no tajn\u011b)<\/figcaption><\/figure>\n\n\n\n

Zp\u016fsoby oh\u0159evu na povrchu deformovan\u00e9ho obrobku jsou bodov\u00e9 vyt\u00e1p\u011bn\u00ed, line\u00e1rn\u00ed oh\u0159ev a troj\u00faheln\u00edkov\u00fd oh\u0159ev.<\/p>\n\n\n\n

Bodov\u00e9 vyt\u00e1p\u011bn\u00ed se t\u00fdk\u00e1 bodu, kde je topnou oblast\u00ed kruhov\u00e1 oblast o ur\u010dit\u00e9m pr\u016fm\u011bru. Podle deformace oceli ur\u010dit rozlo\u017een\u00ed hork\u00fdch m\u00edst a po\u010dtu hork\u00fdch m\u00edst. U \u0161vestkov\u00fdch typ\u016f se b\u011b\u017en\u011b pou\u017e\u00edv\u00e1 v\u00edcebodov\u00e9 vyt\u00e1p\u011bn\u00ed (viz obr\u00e1zek a). Pr\u016fm\u011br ka\u017ed\u00e9ho bodu d by m\u011bl b\u00fdt p\u0159i zah\u0159\u00edv\u00e1n\u00ed tlust\u00e9 desky p\u0159im\u011b\u0159en\u011b v\u011bt\u0161\u00ed a tenk\u00e1 deska by m\u011bla b\u00fdt men\u0161\u00ed, co\u017e by obecn\u011b nem\u011blo b\u00fdt men\u0161\u00ed ne\u017e 15 mm.<\/p>\n\n\n\n

\"Zp\u016fsob
Zp\u016fsob oh\u0159evu<\/figcaption><\/figure><\/div>\n\n\n\n

\u010c\u00edm v\u011bt\u0161\u00ed je deformace, t\u00edm men\u0161\u00ed je vzd\u00e1lenost mezi body a, obecn\u011b 50-100 mm topn\u00fd plamen se pohybuje pod\u00e9l p\u0159\u00edm\u00e9ho sm\u011bru nebo sou\u010dasn\u011b ve sm\u011bru \u0161\u00ed\u0159ky ur\u010dit\u00e9ho p\u0159\u00ed\u010dn\u00e9ho zdvihu, naz\u00fdvan\u00e9ho line\u00e1rn\u00ed oh\u0159ev (viz obr\u00e1zek b). M\u00e1 p\u0159\u00edm\u00fd oh\u0159ev, \u0159et\u011bzov\u00fd oh\u0159ev a p\u00e1sov\u00fd oh\u0159ev 3 druhy. P\u0159\u00ed\u010dn\u00e9 smr\u0161t\u011bn\u00ed hork\u00e9ho dr\u00e1tu je obecn\u011b v\u011bt\u0161\u00ed ne\u017e pod\u00e9ln\u00e9 smr\u0161t\u011bn\u00ed a velikost smr\u0161t\u011bn\u00ed se zvy\u0161uje s rostouc\u00ed \u0161\u00ed\u0159kou hork\u00e9ho dr\u00e1tu. \u0160\u00ed\u0159ka hork\u00e9ho dr\u00e1tu je obecn\u011b 0,5\u20132n\u00e1sobek tlou\u0161\u0165ky oceli. Line\u00e1rn\u00ed vyt\u00e1p\u011bn\u00ed se obecn\u011b pou\u017e\u00edv\u00e1 pro konstrukce s velkou deformac\u00ed.<\/p>\n\n\n\n

Tam, kde je topn\u00e1 oblast troj\u00faheln\u00edkov\u00e1, se naz\u00fdv\u00e1 troj\u00faheln\u00edkov\u00e9 vyt\u00e1p\u011bn\u00ed (viz obr\u00e1zek c). Proto\u017ee je topn\u00e1 plocha velk\u00e1, mno\u017estv\u00ed smr\u0161t\u011bn\u00ed je velk\u00e9 a proto\u017ee \u0161\u00ed\u0159ka oh\u0159evu ve v\u00fd\u0161ce sm\u011bru troj\u00faheln\u00edku nen\u00ed stejn\u00e1, tak\u017ee velikost smr\u0161t\u011bn\u00ed nen\u00ed stejn\u00e1, tak\u017ee deformace v ohybu je tak\u00e9 velk\u00e1, \u010dasto se pou\u017e\u00edv\u00e1 v ohybov\u00e9 deforma\u010dn\u00ed korekci prut\u016f s v\u011bt\u0161\u00ed tuhost\u00ed a v\u011bt\u0161\u00ed deformac\u00ed.<\/p>\n\n\n\n

N\u00e1sleduj\u00edc\u00ed tabulka ukazuje b\u011b\u017en\u00e9 metody korekce plamenem acetylenu pro ocel.<\/p>\n\n\n\n

Pr\u00e1zdn\u00fd<\/td>P\u016fvodn\u00ed deformace<\/td>Zp\u016fsob oh\u0159evu<\/td>Obr\u00e1zek<\/td>Popis<\/td><\/tr>


Tenk\u00fd ocelov\u00fd plech (tlou\u0161\u0165ka ne v\u011bt\u0161\u00ed ne\u017e 8 mm)<\/td>




St\u0159edn\u00ed boule<\/td>




Bodov\u00e9 vyt\u00e1p\u011bn\u00ed<\/td>



\"\"<\/td>		Konvexn\u00ed \u010d\u00e1st\u00ed nahoru, pou\u017eijte kama h\u0159eb\u00edky. Vzd\u00e1lenost oh\u0159\u00edvac\u00edho bodu je 50-100 mm a velikost deformace je mal\u00e1 hodnota. Pr\u016fm\u011br oh\u0159\u00edvac\u00edho bodu je \u03a6\u226515 mm a tlou\u0161\u0165ka desky je v\u011bt\u0161\u00ed hodnota. Body: \u010c\u00edm v\u011bt\u0161\u00ed je deforma\u010dn\u00ed oblast, t\u00edm v\u011bt\u0161\u00ed je bod. Sekvence zah\u0159\u00edv\u00e1n\u00ed je zn\u00e1zorn\u011bna na obr\u00e1zku, dopln\u011bn\u00e1 zatlouk\u00e1n\u00edm<\/td><\/tr>


Tenk\u00fd ocelov\u00fd plech (tlou\u0161\u0165ka ne v\u011bt\u0161\u00ed ne\u017e 8 mm)<\/td>




St\u0159edn\u00ed boule<\/td>




Line\u00e1rn\u00ed vyt\u00e1p\u011bn\u00ed<\/td>




\"\"<\/td>		Konvexn\u00ed \u010d\u00e1st sm\u011b\u0159uje nahoru a je p\u0159ilepen\u00e1 na plo\u0161in\u011b. Existuj\u00ed t\u0159i typy kolejov\u00fdch linek: p\u0159\u00edmka, vlnovka a spir\u00e1la. \u0160\u00ed\u0159ka posledn\u00edch dvou je (0,5-2) t. Pod\u00e9ln\u00e9 smr\u0161t\u011bn\u00ed pod\u00e9l topn\u00e9 linie je men\u0161\u00ed ne\u017e p\u0159\u00ed\u010dn\u00e9 smr\u0161t\u011bn\u00ed. Kdy\u017e je velikost deformace velk\u00e1, lze zv\u011bt\u0161it \u0161\u00ed\u0159ku \u010d\u00e1ry a zmen\u0161it \u0159\u00e1dkov\u00e1n\u00ed<\/td><\/tr>
Tenk\u00fd ocelov\u00fd plech (tlou\u0161\u0165ka ne v\u011bt\u0161\u00ed ne\u017e 8 mm)<\/td>

Na jedn\u00e9 stran\u011b vlnit\u00fd<\/td>

Line\u00e1rn\u00ed vyt\u00e1p\u011bn\u00ed<\/td>

\"\"<\/td>		Konvexn\u00ed \u010d\u00e1st sm\u011b\u0159uje nahoru, sev\u0159ete t\u0159i nedeformovan\u00e9 strany, nejprve zah\u0159ejte ob\u011b strany konvexn\u00ed \u010d\u00e1sti a pot\u00e9 konvexn\u00ed \u010d\u00e1st obklopte a opakujte oh\u0159ev<\/td><\/tr>


Siln\u00fd ocelov\u00fd plech<\/td>


Oblouk oblouku<\/td>

Line\u00e1rn\u00ed vyt\u00e1p\u011bn\u00ed<\/td>

\"\"<\/td>		Um\u00edst\u011bte jej na plo\u0161inu a zah\u0159ejte z nejvy\u0161\u0161\u00edho bodu na 600\u2013800 \u2103, hloubka oh\u0159evu nep\u0159es\u00e1hne 1\/3 tlou\u0161\u0165ky desky a lze jej opakovan\u011b oh\u0159\u00edvat<\/td><\/tr>


Ocelov\u00e1 trubka<\/td>

Ohyb<\/td>

Bodov\u00e9 vyt\u00e1p\u011bn\u00ed<\/td>

\"\"<\/td>		Oh\u0159\u00edv\u00e1n\u00ed konvexn\u00edho povrchu (jedna \u0159ada bod\u016f nebo v\u00edce \u0159ad bod\u016f), rychlost z bodu do bodu by m\u011bla b\u00fdt rychl\u00e1, oh\u0159\u00edv\u00e1n\u00ed \u0159\u00e1dek po \u0159\u00e1dku<\/td><\/tr>
Ocel ve tvaru T.<\/td>Bo\u010dn\u00ed ohyb<\/td>Troj\u00faheln\u00edkov\u00e9 topen\u00ed<\/td>\"\"<\/td>Zah\u0159ejte vyboulenou \u010d\u00e1st vodorovn\u00e9 desky<\/td><\/tr>
Ocel ve tvaru T.<\/td>Bo\u010dn\u00ed ohyb<\/td>Troj\u00faheln\u00edkov\u00e9 topen\u00ed<\/td>\"\"<\/td>Zah\u0159\u00edv\u00e1n\u00ed vyboulen\u00e9 \u010d\u00e1sti svisl\u00e9 desky<\/td><\/tr>
\u00dahlov\u00e1 ocel<\/td>Vn\u011bj\u0161\u00ed ohyb<\/td>Troj\u00faheln\u00edkov\u00e9 topen\u00ed<\/td>\"\"<\/td>Vyt\u00e1p\u011bn\u00ed vyv\u00fd\u0161en\u00e9 oblasti<\/td><\/tr>
I-paprsek<\/td>Bo\u010dn\u00ed ohyb<\/td>Troj\u00faheln\u00edkov\u00e9 topen\u00ed<\/td>\"\"<\/td>Vyt\u00e1p\u011bn\u00ed vyv\u00fd\u0161en\u00e9 oblasti<\/td><\/tr>
Kan\u00e1lov\u00e1 ocel<\/td>\u010c\u00e1ste\u010dn\u00fd bo\u010dn\u00ed ohyb<\/td>Line\u00e1rn\u00ed vyt\u00e1p\u011bn\u00ed<\/td>\"\"<\/td>Dva sva\u0159ovac\u00ed ho\u0159\u00e1ky se zah\u0159\u00edvaj\u00ed ve tvaru vlny sou\u010dasn\u011b<\/td><\/tr>
Ocelov\u00fd v\u00e1lec<\/td>M\u00edstn\u00ed zak\u0159iven\u00ed je p\u0159\u00edli\u0161 velk\u00e9<\/td>Line\u00e1rn\u00ed vyt\u00e1p\u011bn\u00ed<\/td>\"\"<\/td>
Topen\u00ed pod\u00e9l p\u0159\u00edpojnice<\/td><\/tr>
Ocelov\u00fd v\u00e1lec<\/td>M\u00edstn\u00ed zak\u0159iven\u00ed je p\u0159\u00edli\u0161 mal\u00e9<\/td>Line\u00e1rn\u00ed vyt\u00e1p\u011bn\u00ed<\/td>\"\"<\/td>
Topen\u00ed pod\u00e9l p\u0159\u00edpojnice<\/td><\/tr><\/tbody><\/table>
B\u011b\u017en\u00e1 metoda ocelov\u00e9 acetylenov\u00e9 plamenov\u00e9 korekce<\/figcaption><\/figure>\n\n\n\n

Opat\u0159en\u00ed pro provoz opravy plamene<\/strong><\/h3>\n\n\n\n
  • Rychlost oh\u0159evu by m\u011bla b\u00fdt rychl\u00e1, teplo by m\u011blo b\u00fdt koncentrov\u00e1no a rozsah oh\u0159evu mimo oh\u0159\u00edvac\u00ed oblast by m\u011bl b\u00fdt z\u00fa\u017een, jak nejl\u00e9pe um\u00edme. T-vzorek m\u016f\u017ee zlep\u0161it korek\u010dn\u00ed efekt a dos\u00e1hnout v\u011bt\u0161\u00ed lok\u00e1ln\u00ed kontrakce. P\u0159i oprav\u011b velk\u00e9 deforma\u010dn\u00ed oblasti, bez ohledu na pou\u017eit\u00ed v\u00edcebodov\u00e9ho nebo v\u00edce\u0159\u00e1dkov\u00e9ho oh\u0159evu, se oh\u0159\u00edvac\u00ed oblast nesm\u00ed p\u0159ekr\u00fdvat, jinak to po\u0161kod\u00ed materi\u00e1l obrobku. P\u0159ed opravou by m\u011bly b\u00fdt body, \u010d\u00e1ry a sm\u011bry b\u011bhu oh\u0159evu d\u00e1vky ohrani\u010deny podle velikosti deforma\u010dn\u00ed oblasti a stupn\u011b deformace. V\u0161echny body a \u010d\u00e1ry ve stejn\u00e9 d\u00e1vce budou rozm\u00edst\u011bny rozlo\u017een\u011b, symetricky a skokov\u011b v cel\u00e9 oblasti. Cel\u00fd proces zah\u0159\u00edv\u00e1n\u00ed by m\u011bl prob\u00edhat po d\u00e1vk\u00e1ch. Kdy\u017e d\u00e1vka spl\u0148uje po\u017eadavky na opravu, nen\u00ed nutn\u00e9 prov\u00e1d\u011bt dal\u0161\u00ed d\u00e1vku oh\u0159evu. Opravy bez obecn\u00e9ho ujedn\u00e1n\u00ed jsou zak\u00e1z\u00e1ny. To m\u016f\u017ee zajistit nejen korek\u010dn\u00ed efekt, ale tak\u00e9 zabr\u00e1nit p\u0159ekr\u00fdv\u00e1n\u00ed oblasti oh\u0159evu. Po\u0159ad\u00ed hork\u00fdch m\u00edst a liniov\u00fdch poloh ka\u017ed\u00e9 d\u00e1vky p\u00edsku mus\u00ed za\u010d\u00ednat od okraje deformovan\u00e9 oblasti. Nadm\u011brn\u00e9 centralizovan\u00e9 vyt\u00e1p\u011bn\u00ed uprost\u0159ed deformovan\u00e9 oblasti je zak\u00e1z\u00e1no. Jinak dojde k nadm\u011brn\u00e9 deformaci v deformovan\u00e9 oblasti a n\u00e1sledn\u00e1 korekce bude obt\u00ed\u017en\u00e1 vzhledem k vesnick\u00e9 kvalit\u011b oblasti.<\/li><\/ul>\n\n\n\n
    • P\u0159i skute\u010dn\u00e9 korek\u010dn\u00ed pr\u00e1ci, \u010dasto po oh\u0159evu vody k uhasen\u00ed oh\u0159\u00edvac\u00ed oblasti, se za \u00fa\u010delem urychlen\u00ed smr\u0161\u0165ov\u00e1n\u00ed kovu zlep\u0161uje \u00fa\u010dinnost korekce. Ve srovn\u00e1n\u00ed s jednoduchou korekc\u00ed plamene lze efekt zv\u00fd\u0161it v\u00edcekr\u00e1t, tato metoda je tak\u00e9 zn\u00e1m\u00e1 jako metoda korekce vody a ohn\u011b. Metoda korekce vody a ohn\u011b m\u00e1 ur\u010dit\u00e1 omezen\u00ed, kdy\u017e je spr\u00e1vn\u00e1 tlou\u0161\u0165ka 2 mm desky z n\u00edzkouhl\u00edkov\u00e9 oceli, teplota oh\u0159evu obecn\u011b nen\u00ed v\u011bt\u0161\u00ed ne\u017e 600 \u2103, v tuto chv\u00edli by m\u011bla b\u00fdt vzd\u00e1lenost mezi vodou a ohn\u011bm bli\u017e\u0161\u00ed. Kdy\u017e je spr\u00e1vn\u00e1 tlou\u0161\u0165ka ocelov\u00e9ho plechu 4 ~ 6 mm, teplota oh\u0159evu by m\u011bla b\u00fdt 600-800 \u2103, vzd\u00e1lenost mezi vodou a ohn\u011bm je 25-30 mm. P\u0159i oprav\u011b ocelov\u00fdch desek o tlou\u0161\u0165ce v\u011bt\u0161\u00ed ne\u017e 8 mm se vodn\u00ed chlazen\u00ed obecn\u011b nebere v \u00favahu, proto\u017ee vodn\u00ed chlazen\u00ed zp\u016fsob\u00ed v\u011bt\u0161\u00ed nap\u011bt\u00ed. P\u0159i oprav\u011b ocelov\u00fdch plech\u016f, kter\u00e9 maj\u00ed sklon k tvrdnut\u00ed (jako jsou b\u011b\u017en\u00e9 n\u00edzkolegovan\u00e9 ocelov\u00e9 plechy), by vzd\u00e1lenost mezi vodou a ohn\u011bm m\u011bla b\u00fdt v\u011bt\u0161\u00ed. Pro materi\u00e1l s velkou tendenc\u00ed k tvrdnut\u00ed (jako je st\u0159edn\u00ed a vysok\u00e1 uhl\u00edkov\u00e1 ocel nebo legovan\u00e1 ocel) nelze pou\u017e\u00edt metody korekce vody a ohn\u011b a pro pos\u00edlen\u00ed jeho stupn\u011b deformace lze prov\u00e9st pouze ur\u010dit\u00fd stupe\u0148 chlazen\u00ed vzduchem. P\u0159i oprav\u011b oh\u00fdb\u00e1n\u00ed ocelov\u00e9 desky by m\u011bla b\u00fdt hloubka oh\u0159evu regulov\u00e1na v 1\/4 ~ 1\/3 tlou\u0161\u0165ky desky. Nem\u011bl by b\u00fdt p\u0159\u00edli\u0161 hlubok\u00fd, jinak v\u00fdrazn\u011b ovlivn\u00ed \u00fa\u010dinek korekce plamene.<\/li><\/ul>\n\n\n\n
      • P\u0159esto\u017ee je korekce plamenem v\u00fdznamn\u011bj\u0161\u00ed korek\u010dn\u00ed metodou, st\u00e1le m\u00e1 \u0161patnou schopnost kontrolovat velikost korek\u010dn\u00ed deformace, zejm\u00e9na u obrobku, kter\u00fd je obzvl\u00e1\u0161t\u011b citliv\u00fd na \u00fa\u010dinek korekce plamenem, jako je nap\u0159\u00edmen\u00ed \u0161t\u00edhl\u00fdch \u010d\u00e1st\u00ed a rovn\u00e1n\u00ed \u010d\u00e1st\u00ed tenk\u00fdch desek. Proto pro korekci velk\u00fdch deformac\u00ed tohoto druhu obrobku lze plamenovou korekci pou\u017e\u00edt pouze jako metodu hrub\u00e9 korekce a m\u011blo by b\u00fdt slad\u011bno s n\u00e1slednou mechanickou korekc\u00ed; Korekce plamenem by nem\u011bla b\u00fdt pou\u017eita pro korekci takov\u00e9ho obrobku s malou deformac\u00ed a vy\u0161\u0161\u00edmi po\u017eadavky, jinak to povede k nov\u00e9 nebo je\u0161t\u011b v\u011bt\u0161\u00ed deformaci.<\/li><\/ul>\n\n\n\n
        • Aby se urychlilo smr\u0161t\u011bn\u00ed topn\u00e9 z\u00f3ny, jsou \u010dasto dopln\u011bny kladivem, ale pou\u017e\u00edt d\u0159ev\u011bn\u00e9 kladivo nebo m\u011bd\u011bn\u00e9 kladivo, nikoli kladivo.<\/li><\/ul>","protected":false},"excerpt":{"rendered":"

          In the thermal correction of sheet metal, the most widely used is the oxyacetylene flame correction. Flame correction is not<\/p>","protected":false},"author":3,"featured_media":2063,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[856,822,824],"class_list":["post-2045","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-shearing-machine","tag-metalworking","tag-sheet-metal","tag-sheet-metal-processing"],"jetpack_featured_media_url":"https:\/\/hecter.cn\/wp-content\/uploads\/2021\/05\/Heating-part.jpg","_links":{"self":[{"href":"https:\/\/hecter.cn\/cs\/wp-json\/wp\/v2\/posts\/2045","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/hecter.cn\/cs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/hecter.cn\/cs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/hecter.cn\/cs\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/hecter.cn\/cs\/wp-json\/wp\/v2\/comments?post=2045"}],"version-history":[{"count":0,"href":"https:\/\/hecter.cn\/cs\/wp-json\/wp\/v2\/posts\/2045\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/hecter.cn\/cs\/wp-json\/wp\/v2\/media\/2063"}],"wp:attachment":[{"href":"https:\/\/hecter.cn\/cs\/wp-json\/wp\/v2\/media?parent=2045"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/hecter.cn\/cs\/wp-json\/wp\/v2\/categories?post=2045"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/hecter.cn\/cs\/wp-json\/wp\/v2\/tags?post=2045"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}