{"id":26759,"date":"2025-12-04T12:02:28","date_gmt":"2025-12-04T04:02:28","guid":{"rendered":"https:\/\/sinoextrud.com\/?p=26759"},"modified":"2025-12-04T12:02:28","modified_gmt":"2025-12-04T04:02:28","slug":"specifikace-drsnosti-povrchu-hlinikoveho-vylisku","status":"publish","type":"post","link":"https:\/\/sinoextrud.com\/cs\/aluminum-extrusion-surface-roughness-specification\/","title":{"rendered":"Specifikace drsnosti povrchu hlin\u00edkov\u00e9ho v\u00fdlisku?"},"content":{"rendered":"

\"Hlin\u00edkov\u00fd
Hlin\u00edkov\u00fd vytla\u010dovac\u00ed chladi\u010d pro v\u00fdkonov\u00e9 moduly<\/figcaption><\/figure>\n<\/p>\n

Drsn\u00e9 nebo nesoudr\u017en\u00e9 povrchy hlin\u00edkov\u00fdch v\u00fdlisk\u016f mohou v\u00e9st k v\u00e1\u017en\u00fdm probl\u00e9m\u016fm - selh\u00e1n\u00ed povlaku, \u0161patn\u00e9mu ulo\u017een\u00ed nebo odm\u00edtnut\u00ed p\u0159i kontrole kvality.<\/p>\n

Drsnost povrchu hlin\u00edkov\u00fdch v\u00fdlisk\u016f, \u010dasto m\u011b\u0159en\u00e1 hodnotou Ra, ovliv\u0148uje vzhled, toleranci mont\u00e1\u017ee a kvalitu povrchov\u00e9 \u00fapravy. Kontrola Ra je nezbytn\u00e1 jak pro technick\u00e9, tak pro kosmetick\u00e9 vlastnosti.<\/strong><\/p>\n

V tomto \u010dl\u00e1nku vysv\u011btl\u00edm b\u011b\u017en\u00e9 specifikace Ra, vliv textury povrchu na l\u00edcov\u00e1n\u00ed, po\u017eadavky p\u0159ed eloxov\u00e1n\u00edm a n\u00e1stroje pro m\u011b\u0159en\u00ed drsnosti.<\/p>\n

Jak\u00e1 je standardn\u00ed hodnota Ra pro vytla\u010dovan\u00e9 povrchy?<\/h2>\n

\"\u010c\u00edna
\u010c\u00edna Vysoce kvalitn\u00ed le\u0161t\u011bn\u00ed sprchov\u00e9ho koutu hlin\u00edkov\u00fd vytla\u010dovac\u00ed profil<\/figcaption><\/figure>\n<\/p>\n

V\u011bt\u0161ina hlin\u00edkov\u00fdch v\u00fdlisk\u016f m\u00e1 po vyjet\u00ed z lisu drsn\u00fd povrch ve srovn\u00e1n\u00ed s obr\u00e1b\u011bn\u00fdmi d\u00edly. Tato struktura se li\u0161\u00ed v z\u00e1vislosti na slitin\u011b, stavu matrice, rychlosti vytla\u010dov\u00e1n\u00ed a zp\u016fsobu chlazen\u00ed.<\/p>\n

Standardn\u00ed hodnota Ra pro hlin\u00edkov\u00e9 profily ve stavu po vytla\u010den\u00ed se obecn\u011b pohybuje v rozmez\u00ed 1,6 \u00b5m a\u017e 3,2 \u00b5m v z\u00e1vislosti na po\u017eadavc\u00edch aplikace a procesech dokon\u010dov\u00e1n\u00ed.<\/strong><\/p>\n

Pro pr\u016fmyslov\u00e9 sou\u010d\u00e1sti je \u010dasto p\u0159ijateln\u00e1 hodnota Ra kolem 3,2 \u00b5m. U viditeln\u00fdch d\u00edl\u016f nebo d\u00edl\u016f s povlakem se v\u00fdrobci mohou zam\u011b\u0159it na hodnoty Ra 1,6 \u00b5m nebo ni\u017e\u0161\u00ed, aby zlep\u0161ili vizu\u00e1ln\u00ed vzhled a p\u0159ilnavost povlaku.<\/p>\n

Metody vyhlazov\u00e1n\u00ed povrchu, jako je kart\u00e1\u010dov\u00e1n\u00ed, le\u0161t\u011bn\u00ed nebo lehk\u00e9 obr\u00e1b\u011bn\u00ed, se pou\u017e\u00edvaj\u00ed, pokud jsou p\u0159ed dal\u0161\u00ed \u00fapravou po\u017eadov\u00e1ny ni\u017e\u0161\u00ed hodnoty Ra.<\/p>\n\n\n\n\n\n\n\n\n
\u00darove\u0148 Ra (\u00b5m)<\/th>\nKvalita povrchu Popis<\/th>\n<\/tr>\n<\/thead>\n
>3,2 \u00b5m<\/td>\nDrsn\u00fd povrch po vytla\u010den\u00ed<\/td>\n<\/tr>\n
1,6-3,2 \u00b5m<\/td>\nStandardn\u00ed povrchov\u00e1 \u00faprava vytla\u010dov\u00e1n\u00ed<\/td>\n<\/tr>\n
<1,6 \u00b5m<\/td>\nJemn\u00fd, vyhlazen\u00fd nebo le\u0161t\u011bn\u00fd povrch<\/td>\n<\/tr>\n
<0,8 \u00b5m<\/td>\nP\u0159esn\u011b opracovan\u00e9 nebo le\u0161t\u011bn\u00e9<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/svg> Hlin\u00edkov\u00e9 profily po extruzi maj\u00ed obvykle drsnost povrchu mezi 1,6 \u00b5m a 3,2 \u00b5m.<\/b>Pravda<\/span><\/p>

Tento rozsah je b\u011b\u017en\u00fd pro pr\u016fmyslov\u00e9 a konstruk\u010dn\u00ed profily bez sekund\u00e1rn\u00ed povrchov\u00e9 \u00fapravy.<\/p><\/div>
\n

<\/svg> Hlin\u00edkov\u00fd v\u00fdlisek s Ra pod 0,4 \u00b5m je b\u011b\u017en\u00fd bez dal\u0161\u00ed povrchov\u00e9 \u00fapravy.<\/b>False<\/span><\/p>

Ra pod 0,4 \u00b5m je extr\u00e9mn\u011b hladk\u00e9 a zpravidla ho nelze dos\u00e1hnout pouh\u00fdm standardn\u00edm vytla\u010dov\u00e1n\u00edm.<\/p><\/div><\/p>\n

Jak ovliv\u0148uje povrchov\u00e1 \u00faprava l\u00edcov\u00e1n\u00ed sou\u010d\u00e1st\u00ed?<\/h2>\n

\"eloxovan\u00e9
eloxovan\u00e9 hlin\u00edkov\u00e9 v\u00fdlisky kuchy\u0148sk\u00e9 sk\u0159\u00ed\u0148ky profily r\u00e1m<\/figcaption><\/figure>\n<\/p>\n

Pokud se mus\u00ed dva hlin\u00edkov\u00e9 komponenty k sob\u011b p\u0159isunout nebo pokud se jedn\u00e1 o t\u011bsn\u011bn\u00ed a spojovac\u00ed prvky, za\u010d\u00edn\u00e1 b\u00fdt drsnost povrchu d\u016fle\u017eit\u00e1. P\u0159\u00edli\u0161 drsn\u00fd povrch - a d\u00edly do sebe nezapadnou. P\u0159\u00edli\u0161 hladk\u00e9 - a mohou klouzat nebo net\u011bsnit.<\/p>\n

Drsnost povrchu ovliv\u0148uje p\u0159esnost ulo\u017een\u00ed d\u00edl\u016f, snadnost jejich mont\u00e1\u017ee a stabilitu p\u0159i zat\u00ed\u017een\u00ed nebo pohybu.<\/strong><\/p>\n

Pokud m\u00e1 jeden d\u00edl drsn\u00fd povrch s vysok\u00fdmi vrcholy, nemus\u00ed hladce vklouznout do druh\u00e9ho d\u00edlu. \u0160pi\u010dky se mohou zachytit, deformovat nebo zasahovat do jin\u00fdch povrch\u016f. To zp\u016fsobuje hluk, t\u0159en\u00ed nebo poruchy mont\u00e1\u017ee.<\/p>\n

U sestav s p\u0159\u00edsn\u00fdmi tolerancemi m\u016f\u017ee vysok\u00e1 drsnost zp\u016fsobit, \u017ee celkov\u00e9 rozm\u011bry d\u00edlu budou mimo specifikaci, a to i v p\u0159\u00edpad\u011b, \u017ee jmenovit\u00e9 rozm\u011bry jsou spr\u00e1vn\u00e9. To proto, \u017ee Ra ovliv\u0148uje zp\u016fsob, jak\u00fdm materi\u00e1l vypl\u0148uje prostor mezi sty\u010dn\u00fdmi plochami.<\/p>\n\n\n\n\n\n\n\n\n
Aplikace<\/th>\nPreferovan\u00e9 Ra (\u00b5m)<\/th>\n<\/tr>\n<\/thead>\n
Voln\u00e9 konstruk\u010dn\u00ed ulo\u017een\u00ed<\/td>\n\u2264 3,2 \u00b5m<\/td>\n<\/tr>\n
Posuvn\u00e9 mechanismy<\/td>\n\u2264 1,6 \u00b5m<\/td>\n<\/tr>\n
O-krou\u017eky nebo t\u011bsnic\u00ed rozhran\u00ed<\/td>\n\u2264 0,8-1,6 \u00b5m<\/td>\n<\/tr>\n
Dekorativn\u00ed povrch<\/td>\n\u2264 0,8 \u00b5m<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Hladk\u00e9 povrchy tak\u00e9 sni\u017euj\u00ed t\u0159en\u00ed a opot\u0159eben\u00ed. To je d\u016fle\u017eit\u00e9 u pohybliv\u00fdch d\u00edl\u016f nebo u sestav, kter\u00e9 mus\u00ed z\u016fstat stabiln\u00ed po cel\u00e9 roky bez se\u0159izov\u00e1n\u00ed.<\/p>\n

<\/svg> Drsn\u011bj\u0161\u00ed hlin\u00edkov\u00e9 povrchy mohou v\u00e9st ke \u0161patn\u00e9mu l\u00edcov\u00e1n\u00ed a probl\u00e9m\u016fm s toleranc\u00ed v sestav\u00e1ch.<\/b>Pravda<\/span><\/p>

Vysok\u00e9 hodnoty Ra zvy\u0161uj\u00ed mikrorozm\u011brovou chybu a zvy\u0161uj\u00ed t\u0159en\u00ed nebo nesouosost.<\/p><\/div>
\n

<\/svg> Drsnost povrchu nem\u00e1 \u017e\u00e1dn\u00fd vliv na mechanick\u00e9 ulo\u017een\u00ed hlin\u00edkov\u00fdch sou\u010d\u00e1st\u00ed.<\/b>False<\/span><\/p>

Drsnost m\u011bn\u00ed zp\u016fsob kontaktu d\u00edl\u016f a m\u016f\u017ee naru\u0161it p\u0159esn\u00e9 l\u00edcov\u00e1n\u00ed.<\/p><\/div><\/p>\n

Existuj\u00ed limity drsnosti pro p\u0159\u00edpravu eloxov\u00e1n\u00ed?<\/h2>\n

\"p\u0159izp\u016fsoben\u00e9
p\u0159izp\u016fsoben\u00e9 LED p\u00e1sek sv\u011btla hlin\u00edkov\u00fd profil LED hlin\u00edkov\u00fd v\u00fdlisek<\/figcaption><\/figure>\n<\/p>\n

Eloxov\u00e1n\u00ed hlin\u00edku vytv\u00e1\u0159\u00ed ochrannou vrstvu oxidu. Pokud je v\u0161ak z\u00e1kladn\u00ed kov p\u0159\u00edli\u0161 hrub\u00fd, vypad\u00e1 v\u00fdsledn\u00e1 eloxovan\u00e1 povrchov\u00e1 \u00faprava zakalen\u00e1, nerovnom\u011brn\u00e1 nebo dokonce defektn\u00ed.<\/p>\n

Ano - p\u0159ed eloxov\u00e1n\u00edm se u hlin\u00edkov\u00fdch v\u00fdlisk\u016f obvykle vy\u017eaduje drsnost povrchu Ra \u2264 1,6 \u00b5m, aby byl zaji\u0161t\u011bn rovnom\u011brn\u00fd r\u016fst oxid\u016f a hladk\u00fd kone\u010dn\u00fd vzhled.<\/strong><\/p>\n

Pokud je hlin\u00edk p\u0159\u00edli\u0161 hrub\u00fd, eloxov\u00e1n\u00ed tyto nedokonalosti je\u0161t\u011b zv\u00fdrazn\u00ed. Oxid se vytv\u00e1\u0159\u00ed nerovnom\u011brn\u011b kolem vrchol\u016f a \u00fadol\u00ed, \u010d\u00edm\u017e vznik\u00e1 barevn\u00e1 odchylka, nesoulad lesku nebo vizu\u00e1ln\u00ed vady.<\/p>\n

Pro spln\u011bn\u00ed t\u011bchto po\u017eadavk\u016f mohou v\u00fdrobci p\u0159ed eloxov\u00e1n\u00edm pou\u017e\u00edt povrchov\u00e9 \u00fapravy:<\/p>\n

    \n
  • Lehk\u00e9 kart\u00e1\u010dov\u00e1n\u00ed nebo le\u0161t\u011bn\u00ed<\/li>\n
  • Lept\u00e1n\u00ed kyselinou<\/li>\n
  • Mechanick\u00e9 brou\u0161en\u00ed nebo povrchov\u00e1 \u00faprava p\u00e1sem<\/li>\n<\/ul>\n

    Tyto kroky sni\u017euj\u00ed drsnost, odstra\u0148uj\u00ed povrchov\u00e9 ne\u010distoty a p\u0159ipravuj\u00ed povrch na eloxov\u00e1n\u00ed, ani\u017e by do\u0161lo k naru\u0161en\u00ed tvaru nebo rozm\u011br\u016f.<\/p>\n

    V aplikac\u00edch, jako jsou architektonick\u00e9 r\u00e1my nebo spot\u0159ebn\u00ed elektronika, je kontrola drsnosti p\u0159ed eloxov\u00e1n\u00edm rozhoduj\u00edc\u00ed pro dosa\u017een\u00ed prvot\u0159\u00eddn\u00edho vzhledu.<\/p>\n

    <\/svg> Eloxov\u00e1n\u00ed na drsn\u00e9m hlin\u00edkov\u00e9m povrchu m\u016f\u017ee m\u00edt za n\u00e1sledek nerovnom\u011brnou tlou\u0161\u0165ku povlaku a \u0161patn\u00fd vzhled.<\/b>Pravda<\/span><\/p>

    Struktura povrchu ovliv\u0148uje r\u016fst oxid\u016f a m\u016f\u017ee v\u00e9st k nekonzistentn\u00edm povrchov\u00fdm \u00faprav\u00e1m, pokud nen\u00ed kontrolov\u00e1na.<\/p><\/div>
    \n

    <\/svg> Hlin\u00edkov\u00e9 povrchy by m\u011bly b\u00fdt p\u0159ed eloxov\u00e1n\u00edm co nejhrub\u0161\u00ed, aby se oxidov\u00e1 vrstva l\u00e9pe spojila.<\/b>False<\/span><\/p>

    P\u0159\u00edli\u0161n\u00e1 drsnost vede k nerovnom\u011brn\u00e9mu povlaku a estetick\u00fdm probl\u00e9m\u016fm.<\/p><\/div><\/p>\n

    Jak\u00e9 n\u00e1stroje se pou\u017e\u00edvaj\u00ed k m\u011b\u0159en\u00ed drsnosti povrchu?<\/h2>\n

    \"Hlin\u00edkov\u00fd
    Hlin\u00edkov\u00fd v\u00fdlisek 6063 eloxovan\u00e9 oble\u010den\u00ed Drive Airer hlin\u00edkov\u00fd stojan profil<\/figcaption><\/figure>\n<\/p>\n

    M\u011b\u0159en\u00ed Ra nen\u00ed jen vizu\u00e1ln\u00ed - prov\u00e1d\u00ed se pomoc\u00ed speci\u00e1ln\u00edch p\u0159\u00edstroj\u016f ur\u010den\u00fdch k detekci a kvantifikaci mikroskopick\u00fdch nerovnost\u00ed povrchu.<\/p>\n

    Drsnost povrchu hlin\u00edkov\u00fdch v\u00fdlisk\u016f se obvykle m\u011b\u0159\u00ed pomoc\u00ed kontaktn\u00edch profilometr\u016f nebo bezkontaktn\u00edch laserov\u00fdch\/optick\u00fdch za\u0159\u00edzen\u00ed v z\u00e1vislosti na p\u0159esnosti a rychlosti v\u00fdroby.<\/strong><\/p>\n

    B\u011b\u017en\u00e9 m\u011b\u0159ic\u00ed n\u00e1stroje:<\/h3>\n\n\n\n\n\n\n\n\n
    Typ n\u00e1stroje<\/th>\nJak to funguje<\/th>\nPozn\u00e1mky<\/th>\n<\/tr>\n<\/thead>\n
    Stylusov\u00fd profilometr<\/td>\nJemn\u00e1 jehla sleduje povrch a vypo\u010d\u00edt\u00e1v\u00e1 Ra<\/td>\n\u0160iroce pou\u017e\u00edvan\u00e9 v laborato\u0159\u00edch kontroly kvality<\/td>\n<\/tr>\n
    Optick\u00fd profilometr<\/td>\nPou\u017e\u00edv\u00e1 sv\u011btlo nebo laser k mapov\u00e1n\u00ed povrchu<\/td>\nVhodn\u00e9 pro choulostiv\u00e9 nebo m\u011bkk\u00e9 povrchy<\/td>\n<\/tr>\n
    Hmatov\u00fd tester drsnosti<\/td>\nRu\u010dn\u00ed n\u00e1stroj pro rychlou kontrolu v ter\u00e9nu<\/td>\nM\u00e9n\u011b p\u0159esn\u00e9, pou\u017e\u00edvan\u00e9 pro kontrolu<\/td>\n<\/tr>\n
    3D skenery povrchu<\/td>\nSn\u00edm\u00e1n\u00ed drsnosti na slo\u017eit\u00fdch tvarech<\/td>\nPou\u017e\u00edv\u00e1 se pro d\u00edly s obrysy<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

    Hodnota Ra se obvykle m\u011b\u0159\u00ed v mikrometrech (\u00b5m) a hodnoty se mohou v r\u016fzn\u00fdch z\u00f3n\u00e1ch t\u00e9ho\u017e d\u00edlu li\u0161it. N\u011bkter\u00e9 syst\u00e9my kvality m\u011b\u0159\u00ed Ra ve v\u00edce bodech, aby byla zaji\u0161t\u011bna konzistence.<\/p>\n

    <\/svg> Profilometr je b\u011b\u017en\u00fdm n\u00e1strojem pro m\u011b\u0159en\u00ed Ra na hlin\u00edkov\u00fdch povr\u0161\u00edch.<\/b>Pravda<\/span><\/p>

    Syst\u00e9my zalo\u017een\u00e9 na stylusu jsou p\u0159esn\u00e9 a \u0161iroce pou\u017e\u00edvan\u00e9 p\u0159i kontrole kvality vytla\u010dov\u00e1n\u00ed.<\/p><\/div>
    \n

    <\/svg> Drsnost povrchu hlin\u00edku se obvykle m\u011b\u0159\u00ed pouze vizu\u00e1ln\u00ed kontrolou.<\/b>False<\/span><\/p>

    Vizu\u00e1ln\u00ed kontrola m\u016f\u017ee odhalit nedostatky, ale p\u0159esn\u00e9 hodnoty Ra vy\u017eaduj\u00ed p\u0159\u00edstrojov\u00e9 vybaven\u00ed.<\/p><\/div><\/p>\n

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

    Na drsnosti povrchu z\u00e1le\u017e\u00ed - zejm\u00e9na pokud se hlin\u00edkov\u00e9 v\u00fdlisky pou\u017e\u00edvaj\u00ed v p\u0159esn\u00fdch sestav\u00e1ch nebo se na n\u011b nan\u00e1\u0161ej\u00ed povlaky, jako je nap\u0159\u00edklad eloxov\u00e1n\u00ed. Znalost o\u010dek\u00e1van\u00e9 hodnoty Ra pom\u00e1h\u00e1 vyhnout se probl\u00e9m\u016fm s l\u00edcov\u00e1n\u00edm, povrchovou \u00fapravou a funk\u010dnost\u00ed. A\u0165 u\u017e se m\u011b\u0159\u00ed stylusem nebo skenerem, udr\u017eov\u00e1n\u00ed Ra v r\u00e1mci specifikace chr\u00e1n\u00ed kvalitu p\u0159i v\u00fdrob\u011b, povrchov\u00e9 \u00faprav\u011b a fin\u00e1ln\u00ed mont\u00e1\u017ei.<\/p>","protected":false},"excerpt":{"rendered":"

    Aluminum Extrusion Heat Sink for Power Modules Rough or inconsistent surfaces on aluminum extrusions can lead to serious problems \u2014 coating failure, poor fits, or rejections in quality checks. Aluminum extrusion surface roughness, often measured by Ra value, affects appearance, assembly tolerance, and finish quality. Controlling Ra is essential for both technical and cosmetic performance. […]<\/p>\n","protected":false},"author":6,"featured_media":10741,"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-26759","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\/26759","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=26759"}],"version-history":[{"count":0,"href":"https:\/\/sinoextrud.com\/cs\/wp-json\/wp\/v2\/posts\/26759\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/sinoextrud.com\/cs\/wp-json\/wp\/v2\/media\/10741"}],"wp:attachment":[{"href":"https:\/\/sinoextrud.com\/cs\/wp-json\/wp\/v2\/media?parent=26759"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/sinoextrud.com\/cs\/wp-json\/wp\/v2\/categories?post=26759"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/sinoextrud.com\/cs\/wp-json\/wp\/v2\/tags?post=26759"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}