Br\u00fasne zrn\u00e1 br\u00fasneho kot\u00fa\u010da musia by\u0165 ostr\u00e9 a odoln\u00e9, aby boli \u00fa\u010dinn\u00fdmi rezn\u00fdmi n\u00e1strojmi, pri\u010dom ich pevnos\u0165 z\u00e1vis\u00ed od spojiva, ktor\u00e9 ich dr\u017e\u00ed pohromade.<\/p>\n
Br\u00fasne kot\u00fa\u010de z oxidu hlinit\u00e9ho s tvrdou viazacou zmesou zaru\u010duj\u00fa dlh\u00fa \u017eivotnos\u0165 a r\u00fdchle br\u00fasenie materi\u00e1lov, ako je hlin\u00edk, mosadz a m\u00e4kk\u00fd bronz. Zmesi oxidu hlinit\u00e9ho a zirk\u00f3nu poskytuj\u00fa e\u0161te vy\u0161\u0161ie r\u00fdchlosti a v\u00e4\u010d\u0161iu odolnos\u0165 pri hrubom br\u00fasen\u00ed.<\/p>\n
Br\u00fasny materi\u00e1l je jedn\u00fdm zo z\u00e1kladn\u00fdch prvkov ka\u017ed\u00e9ho br\u00fasneho kot\u00fa\u010da a pon\u00faka r\u00f4zne br\u00fasne zrn\u00e1 navrhnut\u00e9 \u0161peci\u00e1lne pre konkr\u00e9tne pou\u017eitie a prev\u00e1dzkov\u00e9 podmienky.<\/p>\n
Emery patr\u00ed medzi naj\u010dastej\u0161ie pou\u017e\u00edvan\u00e9 pr\u00edrodn\u00e9 br\u00fasne zrn\u00e1, za n\u00edm nasleduj\u00fa gran\u00e1t, oxid hlinit\u00fd a zirk\u00f3novo-hlinit\u00e1 zmes. Ka\u017ed\u00e9 z nich m\u00e1 odli\u0161n\u00e9 vlastnosti, pokia\u013e ide o tvrdos\u0165, pevnos\u0165 a lomov\u00fa h\u00fa\u017eevnatos\u0165 \u2013 ve\u013ekos\u0165 z\u0155n ur\u010duje, ak\u00e9 r\u00fdchlo sa na br\u00fasnom kot\u00fa\u010di vytvoria br\u00fasne dr\u00e1\u017eky a akou r\u00fdchlos\u0165ou bude prebieha\u0165 br\u00fasenie.<\/p>\n
Karbid krem\u00edka je mimoriadne tvrd\u00fd syntetick\u00fd br\u00fasny materi\u00e1l s ostr\u00fdmi, krehk\u00fdmi zrnami, ktor\u00e9 sa l\u00e1mu a odha\u013euj\u00fa nov\u00e9 rezn\u00fa hranu, v\u010faka \u010domu re\u017ee r\u00fdchlej\u0161ie ako oxid hlinit\u00fd a je ide\u00e1lnou vo\u013ebou pre kovy, hrub\u00e9 materi\u00e1ly a projekty renov\u00e1cie dreva. Pou\u017e\u00edva sa aj ako medzistupe\u0148 medzi jednotliv\u00fdmi vrstvami povrchovej \u00fapravy pri projektoch spracovania dreva. Je k dispoz\u00edcii vo forme p\u00e1sov, listov, kot\u00fa\u010dov alebo \u0161pongi\u00ed a po\u010das celej svojej \u017eivotnosti zabezpe\u010duje konzistentne vysok\u00fa kvalitu rezu, pri\u010dom je drah\u0161\u00ed ako jeho ekvivalenty z oxidu hlinit\u00e9ho.<\/p>\n
Typy spoj\u00edv ur\u010duj\u00fa, ako dobre dr\u017eia abraz\u00edvne \u010dastice pohromade. Okrem toho to ovplyv\u0148uje ve\u013ekos\u0165 tlaku vyv\u00edjan\u00e9ho po\u010das br\u00fasenia; tvrd\u0161ie spojiv\u00e1 m\u00f4\u017eu pred\u013a\u017ei\u0165 \u017eivotnos\u0165 br\u00fasneho kot\u00fa\u010da, ale zni\u017euj\u00fa ostros\u0165 a spoma\u013euj\u00fa r\u00fdchlos\u0165 odoberania materi\u00e1lu, zatia\u013e \u010do m\u00e4k\u0161ie spojiv\u00e1 umo\u017e\u0148uj\u00fa r\u00fdchlej\u0161ie odoberanie materi\u00e1lu t\u00fdm, \u017ee sa r\u00fdchlej\u0161ie rozpadaj\u00fa a \u010dastej\u0161ie odha\u013euj\u00fa \u010fal\u0161ie abraz\u00edvne zrn\u00e1.<\/p>\n
Br\u00fasne kot\u00fa\u010de z oxidu hlinit\u00e9ho sa najlep\u0161ie hodia na br\u00fasenie ocel\u00ed s n\u00edzkou pevnos\u0165ou v \u0165ahu a feritick\u00fdch liatin, pri\u010dom poskytuj\u00fa dobr\u00fa \u017eivotnos\u0165 a kvalitu povrchu, av\u0161ak pri rezan\u00ed tvrd\u00fdch kovov s\u00fa menej \u00fa\u010dinn\u00e9 ako kot\u00fa\u010de z CBN alebo diamantov\u00e9 kot\u00fa\u010de. Na t\u00fato \u00falohu m\u00f4\u017eu by\u0165 vhodnej\u0161ie kot\u00fa\u010de z CBN alebo diamantov\u00e9 kot\u00fa\u010de.<\/p>\n
Zelen\u00e9 silik\u00e1tov\u00e9 spojiv\u00e1 (GC) t\u00fdchto kot\u00fa\u010dov sa vyr\u00e1baj\u00fa zmie\u0161an\u00edm pr\u00e1\u0161kov\u00e9ho kremi\u010ditanu draseln\u00e9ho a floridsk\u00e9ho kaol\u00ednu do suchej zmesi, lisovan\u00edm polotovaru, su\u0161en\u00edm a vypa\u013eovan\u00edm, a\u017e k\u00fdm nevznikne por\u00e9zne teleso, ktor\u00e9 sa pri vysok\u00fdch r\u00fdchlostiach povrchu kot\u00fa\u010da nepo\u0165ahuje glaz\u00farou. Ich br\u00fasne zrn\u00e1 s\u00fa menej ostr\u00e9 ako v pr\u00edpade \u010diernosilik\u00e1tov\u00fdch viazan\u00ed; preto sa tieto kot\u00fa\u010de daj\u00fa pou\u017ei\u0165 na spracovanie skla, keramiky, nekovov\u00fdch materi\u00e1lov a zliatin.<\/p>\n
Trieda br\u00fasneho kot\u00fa\u010da ur\u010duje, ako pevne viazacie \u010dinidlo dr\u017e\u00ed br\u00fasne zrn\u00e1 pohromade, a ovplyv\u0148uje tie\u017e r\u00fdchlos\u0165 odoberania br\u00fasneho materi\u00e1lu aj kvalitu povrchovej \u00fapravy.<\/p>\n
Br\u00fasne zrn\u00e1 sa zarez\u00e1vaj\u00fa do povrchu obrobku, \u010d\u00edm odstra\u0148uj\u00fa materi\u00e1l vo forme mal\u00fdch triesok; po\u010das pr\u00e1ce sa ich rezn\u00fdch hrotov opotreb\u00favaj\u00fa, \u010d\u00edm sa na ich mieste odha\u013euj\u00fa nov\u00e9 rezn\u00e9 hroty. V priebehu \u010dasu doch\u00e1dza v d\u00f4sledku trenia medzi obrobkom a br\u00fasivom k hromadeniu tepla; to nakoniec vedie k l\u00e1maniu z\u0155n, na ktor\u00fdch sa odha\u013euj\u00fa nov\u00e9 rezn\u00e9 hroty.<\/p>\n
V\u00fdber vhodnej zrnitosti pre dan\u00fa aplik\u00e1ciu z\u00e1vis\u00ed jednak od spracov\u00e1van\u00e9ho materi\u00e1lu, jednak od jeho tvrdosti. Vo v\u0161eobecnosti plat\u00ed, \u017ee tvrd\u00e9 a potenci\u00e1lne krehk\u00e9 materi\u00e1ly vy\u017eaduj\u00fa jemnej\u0161ie zrnitosti s ni\u017e\u0161ou tvrdos\u0165ou, aby sa zabr\u00e1nilo nadmern\u00e9mu opotrebeniu br\u00fasnych z\u0155n; pre m\u00e4kk\u00e9 a tv\u00e1rne materi\u00e1ly m\u00f4\u017eu by\u0165 vhodnej\u0161ie kot\u00fa\u010de so strednou a\u017e hrubou zrnitos\u0165ou.<\/p>\n
Por\u00e9zne br\u00fasne kot\u00fa\u010de umo\u017e\u0148uj\u00fa vo\u013en\u00fd prietok chladiacej kvapaliny a reguluj\u00fa tvorbu tepla, \u010d\u00edm udr\u017eiavaj\u00fa br\u00fasne zrn\u00e1 ostr\u00e9 a z\u00e1rove\u0148 kontroluj\u00fa teplotu. Ak v\u0161ak p\u00f3ry kot\u00fa\u010da nie s\u00fa dostato\u010dne ve\u013ek\u00e9 na to, aby \u00fa\u010dinne odv\u00e1dzali chladiacu kvapalinu, m\u00f4\u017eu sa \u010dasom upcha\u0165 a kot\u00fa\u010d strat\u00ed svoju \u00fa\u010dinnos\u0165.<\/p>\n
Sp\u00e1jacie l\u00e1tky musia tie\u017e zabezpe\u010di\u0165 s\u00fadr\u017enos\u0165 a dostato\u010dn\u00fd priestor medzi br\u00fasnymi zrnami. Bez dostato\u010dnej p\u00f3rovitosti a priestoru medzi zrnami sa br\u00fasivo m\u00f4\u017ee pred\u010dasne opotrebova\u0165 a zaplni\u0165 sa trieskami, \u010d\u00edm strat\u00ed \u00fa\u010dinnos\u0165 a upch\u00e1 sa ne\u010distotami.<\/p>\n
N\u00edzkoteplotn\u00e1 vitrifikovan\u00e1 v\u00e4zba, \u0161peci\u00e1lne vyvinut\u00e1 s cie\u013eom minimalizova\u0165 jej chemick\u00fa reaktivitu s karbidom krem\u00edka, bola skombinovan\u00e1 s dut\u00fdmi keramick\u00fdmi guli\u010dkami na v\u00fdrobu vysoko \u00fa\u010dinn\u00fdch br\u00fasnych kot\u00fa\u010dov vhodn\u00fdch na br\u00fasenie tit\u00e1nu a m\u00e4kk\u00fdch materi\u00e1lov, ktor\u00e9 sa vyskytuj\u00fa v presn\u00fdch kovov\u00fdch s\u00fa\u010diastkach, ako s\u00fa napr\u00edklad kompozitn\u00e9 materi\u00e1ly. Tieto kot\u00fa\u010de pon\u00fakaj\u00fa vynikaj\u00face v\u00fdsledky br\u00fasenia.<\/p>\n
Zelen\u00fd karbid krem\u00edka prevy\u0161uje \u010dierny karbid krem\u00edka, pokia\u013e ide o br\u00fasenie tvrd\u00fdch a krehk\u00fdch materi\u00e1lov, ako s\u00fa karbid volfr\u00e1mu, optick\u00e9 sklo a keramika. Ru\u017eov\u00fd taven\u00fd oxid hlinit\u00fd je ide\u00e1lny pre obrobky, ktor\u00e9 vy\u017eaduj\u00fa vysok\u00fa kvalitu povrchu, ako s\u00fa n\u00e1stroje, z\u00e1vity na pr\u00edstrojoch alebo obrobky so z\u00e1vitom.<\/p>","protected":false},"excerpt":{"rendered":"
Grinding wheel abrasive grains must be sharp and durable to be effective cutting tools, with their strength determined by a […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""}},"footnotes":""},"categories":[3],"tags":[],"class_list":["post-30","post","type-post","status-publish","format-standard","hentry","category-sic-knowledge"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/siliconcarbideceramic.net\/sk\/wp-json\/wp\/v2\/posts\/30","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/siliconcarbideceramic.net\/sk\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/siliconcarbideceramic.net\/sk\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/siliconcarbideceramic.net\/sk\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/siliconcarbideceramic.net\/sk\/wp-json\/wp\/v2\/comments?post=30"}],"version-history":[{"count":1,"href":"https:\/\/siliconcarbideceramic.net\/sk\/wp-json\/wp\/v2\/posts\/30\/revisions"}],"predecessor-version":[{"id":31,"href":"https:\/\/siliconcarbideceramic.net\/sk\/wp-json\/wp\/v2\/posts\/30\/revisions\/31"}],"wp:attachment":[{"href":"https:\/\/siliconcarbideceramic.net\/sk\/wp-json\/wp\/v2\/media?parent=30"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/siliconcarbideceramic.net\/sk\/wp-json\/wp\/v2\/categories?post=30"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/siliconcarbideceramic.net\/sk\/wp-json\/wp\/v2\/tags?post=30"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}