{"id":1422,"date":"2026-06-29T03:45:02","date_gmt":"2026-06-29T03:45:02","guid":{"rendered":"https:\/\/worm-and-worm-wheel.com\/?p=1422"},"modified":"2026-06-29T03:45:02","modified_gmt":"2026-06-29T03:45:02","slug":"worm-and-worm-wheel-for-grinding-and-polishing-machine-drives","status":"publish","type":"post","link":"https:\/\/worm-and-worm-wheel.com\/cs\/worm-and-worm-wheel-for-grinding-and-polishing-machine-drives\/","title":{"rendered":"\u0160nek a \u0161nekov\u00e9 kolo pro pohony brusn\u00fdch a le\u0161t\u00edc\u00edch stroj\u016f"},"content":{"rendered":"
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Korea Ever-Power \u00b7 Pr\u016fvodce aplika\u010dn\u00edm in\u017een\u00fdrstv\u00edm<\/p>\n

\u0160nek a \u0161nekov\u00e9 kolo pro pohony brusn\u00fdch a le\u0161t\u00edc\u00edch stroj\u016f<\/h1>\n

Le\u0161ti\u010dka optick\u00fdch \u010do\u010dek vytv\u00e1\u0159\u00ed rovinnost povrchu 0,05 \u00b5m \u2013 co\u017e je zhruba tis\u00edcina tlou\u0161\u0165ky lidsk\u00e9ho vlasu. V tomto m\u011b\u0159\u00edtku zanech\u00e1v\u00e1 ka\u017ed\u00fd zdroj vibrac\u00ed ve stroji sv\u016fj podpis na upraven\u00e9m povrchu. \u0160nekov\u00fd p\u0159evodov\u00fd p\u00e1r poh\u00e1n\u011bj\u00edc\u00ed le\u0161tic\u00ed v\u0159eteno mus\u00ed p\u0159isp\u00edvat vibracemi z\u00e1b\u011bru m\u00e9n\u011b ne\u017e 0,002 mm\/s \u2013 co\u017e je o \u0159\u00e1d ti\u0161\u0161\u00ed ne\u017e pr\u00e9miov\u00fd pohon v\u00fdtahu a o dva \u0159\u00e1dy ti\u0161\u0161\u00ed ne\u017e standardn\u00ed pr\u016fmyslov\u00fd reduktor.<\/p>\n

Promluvte si s technikem brusn\u00fdch pohon\u016f \u2192<\/a><\/p>\n<\/div>\n

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Rychl\u00e1 odpov\u011b\u010f<\/div>\n

Brusky a le\u0161ti\u010dky produkuj\u00ed nejjemn\u011bj\u0161\u00ed povrchov\u00e9 \u00fapravy ve v\u00fdrob\u011b \u2013 Ra 0,05 a\u017e 0,8 \u00b5m \u2013 a jak\u00e9koli vibrace z pohonn\u00e9ho syst\u00e9mu se p\u0159\u00edmo projevuj\u00ed na hotov\u00e9m povrchu jako periodick\u00e9 zvln\u011bn\u00ed nebo zhor\u0161en\u00ed drsnosti. Anal\u00fdza vibrac\u00ed v z\u00e1vislosti na kvalit\u011b povrchu kvantifikuje, jak se amplituda vibrac\u00ed z\u00e1b\u011bru \u0161nekov\u00e9ho kola na frekvenci s\u00edt\u011b prom\u00edt\u00e1 do p\u0159\u00edsp\u011bvku k drsnosti povrchu: ka\u017ed\u00fdch 0,01 mm\/s vibrac\u00ed s\u00edt\u011b p\u0159id\u00e1v\u00e1 k hodnot\u011b Ra povrchu p\u0159ibli\u017en\u011b 0,02 a\u017e 0,05 \u00b5m. U rovinn\u00e9 brusky s c\u00edlem Ra 0,2 \u00b5m je vibra\u010dn\u00ed bilance p\u00e1ru \u0161nekov\u00fdch kol pod 0,02 mm\/s \u2013 \u010deho\u017e lze dos\u00e1hnout pouze s lapovan\u00fdmi nebo p\u0159ejemn\u011b jemn\u00fdmi \u0161neky p\u0159i Ra 0,1 a\u017e 0,2 \u00b5m a t\u0159\u00eddou p\u0159esnosti DIN 3 a\u017e 4. Pro optick\u00e9 le\u0161t\u011bn\u00ed p\u0159i Ra 0,05 \u00b5m kles\u00e1 bilance pod 0,005 mm\/s \u2013 co\u017e vy\u017eaduje p\u00e1ry \u0161nekov\u00fdch kol t\u0159\u00eddy 2, kter\u00e9 jsou jednotliv\u011b lapov\u00e1ny a testov\u00e1ny vibracemi. Stabilita ot\u00e1\u010dek v rozmez\u00ed plus m\u00ednus 0,5 procenta je povinn\u00e1, proto\u017ee rychlost \u00fab\u011bru materi\u00e1lu brusn\u00e9ho kotou\u010de je \u00fam\u011brn\u00e1 rychlosti stolu \u2013 zm\u011bna ot\u00e1\u010dek o 1 procento zp\u016fsob\u00ed zm\u011bnu hloubky \u0159ezu o 1 procento, kter\u00e1 p\u0159ekro\u010d\u00ed celkovou toleranci tvaru u p\u0159esn\u011b brou\u0161en\u00fdch sou\u010d\u00e1st\u00ed.<\/p>\n<\/div>\n

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Pro\u010d brusn\u00e9 a le\u0161tic\u00ed stroje pot\u0159ebuj\u00ed pohony s ultran\u00edzk\u00fdmi vibracemi<\/h2>\n

\"\u0160nekov\u00fd<\/p>\n

Brou\u0161en\u00ed a le\u0161t\u011bn\u00ed se od fr\u00e9zov\u00e1n\u00ed a soustru\u017een\u00ed li\u0161\u00ed z\u00e1sadn\u011b: hloubka \u0159ezu se m\u011b\u0159\u00ed v mikrometrech (1 a\u017e 20 \u00b5m na pr\u016fchod), nikoli v milimetrech. V tomto m\u011b\u0159\u00edtku se rozd\u00edl mezi \u00famysln\u00fdm \u00fab\u011brem materi\u00e1lu a po\u0161kozen\u00edm povrchu zp\u016fsoben\u00fdm vibracemi st\u00edr\u00e1 \u2013 vibra\u010dn\u00ed posun 5 \u00b5m v kontaktn\u00edm bod\u011b odstran\u00ed 5 \u00b5m materi\u00e1lu na vrcholu vibrac\u00ed a nulu na prohlubni, co\u017e vytv\u00e1\u0159\u00ed vlnitost povrchu rovnaj\u00edc\u00ed se amplitud\u011b vibrac\u00ed. Obroben\u00fd povrch se st\u00e1v\u00e1 z\u00e1znamem ka\u017ed\u00e9ho zdroje vibrac\u00ed ve stroji.<\/p>\n

\u0160nekov\u00fd soukol\u00ed je jedn\u00edm z 5 a\u017e 8 zdroj\u016f vibrac\u00ed v typick\u00e9 brusce (dal\u0161\u00ed zahrnuj\u00ed lo\u017eiska v\u0159etena brusn\u00e9ho kotou\u010de, nevyv\u00e1\u017eenost kotou\u010de, hydraulick\u00e9 \u010derpadlo, \u010derpadlo chladic\u00ed kapaliny a z\u00e1kladna stroje). Ka\u017ed\u00fd zdroj mus\u00ed z\u016fstat v r\u00e1mci sv\u00e9ho p\u0159id\u011blen\u00e9ho rozpo\u010dtu vibrac\u00ed, aby celkov\u00fd sou\u010det z\u016fstal pod prahovou hodnotou kvality povrchu. P\u0159\u00edsp\u011bvek \u0161nekov\u00e9ho soukol\u00ed poch\u00e1z\u00ed ze dvou mechanism\u016f: buzen\u00ed s\u00ed\u0165ovou frekvenc\u00ed (periodick\u00fd z\u00e1b\u011br zub\u016f p\u0159i ot\u00e1\u010den\u00ed \u0161neku) a chyby p\u0159enosu (mikrovariace v\u00fdstupn\u00ed rychlosti na vstupn\u00ed ot\u00e1\u010dku v d\u016fsledku nedokonalost\u00ed geometrie zub\u016f).<\/p>\n

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Buzen\u00ed s\u00ed\u0165ovou frekvenc\u00ed<\/div>\n

Kluzn\u00fd z\u00e1b\u011br ka\u017ed\u00e9ho z\u00e1vitu \u0161neku se zubem kola vytv\u00e1\u0159\u00ed periodickou s\u00edlu s frekvenc\u00ed z\u00e1b\u011bru (ot\u00e1\u010dky \u0161neku pro jednor\u00e1zov\u00fd chod). Tato s\u00edla bud\u00ed konstrukci stroje. Hlad\u0161\u00ed povrchy zub\u016f (ni\u017e\u0161\u00ed Ra) sni\u017euj\u00ed amplitudu buzen\u00ed \u2013 hlavn\u00ed d\u016fvod, pro\u010d se pro brusky specifikuj\u00ed lapovan\u00e9 \u0161neky.<\/p>\n<\/div>\n

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Chyba p\u0159enosu<\/div>\n

Nedokonalosti v geometrii zubu zp\u016fsobuj\u00ed m\u00edrn\u00e9 zrychlen\u00ed a zpomalen\u00ed v\u00fdstupu v r\u00e1mci ka\u017ed\u00e9 ot\u00e1\u010dky \u2013 mikrovariace zvan\u00e1 chyba p\u0159enosu. Tato variace se p\u0159\u00edmo prom\u00edt\u00e1 do zm\u011bny rychlosti stolu, co\u017e zp\u016fsobuje vlnitost povrchu obrobku b\u011bhem ot\u00e1\u010den\u00ed \u0161neku. T\u0159\u00edda DIN 3 a\u017e 4 minimalizuje chybu p\u0159enosu.<\/p>\n<\/div>\n

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Struktur\u00e1ln\u00ed rezonan\u010dn\u00ed vazba<\/div>\n

Pokud se frekvence s\u00edt\u011b shoduje se struktur\u00e1ln\u00ed rezonanc\u00ed stroje (rozsah 10 a\u017e 200 Hz), i mal\u00e9 amplitudy buzen\u00ed vytv\u00e1\u0159ej\u00ed v kontaktn\u00edm bod\u011b s brou\u0161en\u00edm velk\u00e9 vibrace. Zm\u011bna vstupn\u00edch ot\u00e1\u010dek \u0161neku o 5 a\u017e 10 procent m\u016f\u017ee posunout frekvenci s\u00edt\u011b od rezonance \u2013 toto lad\u011bn\u00ed nevy\u017eaduje \u017e\u00e1dnou zm\u011bnu hardwaru.<\/p>\n<\/div>\n<\/div>\n

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Anal\u00fdza vibrac\u00ed v z\u00e1vislosti na kvalit\u011b povrchu \u2013 od mm\/s na s\u00edti do \u00b5m Ra na obrobku<\/h2>\n

Vztah mezi vibracemi z\u00e1b\u011bru \u0161nekov\u00e9ho p\u0159evodu a drsnost\u00ed brou\u0161en\u00e9ho povrchu z\u00e1vis\u00ed na amplitud\u011b vibrac\u00ed, dr\u00e1ze p\u0159enosu struktury z p\u0159evodov\u00e9 sk\u0159\u00edn\u011b do brusn\u00e9ho kontaktu a parametrech procesu brou\u0161en\u00ed (ot\u00e1\u010dky kotou\u010de, hloubka \u0159ezu, chladic\u00ed kapalina). P\u0159enosov\u00e1 funkce se li\u0161\u00ed podle konstrukce stroje, ale empirick\u00e1 data nap\u0159\u00ed\u010d \u0159adou rovinn\u00fdch a v\u00e1lcov\u00fdch brusek ukazuj\u00ed konzistentn\u00ed pravidlo: ka\u017ed\u00e1 efektivn\u00ed hodnota vibrac\u00ed z\u00e1b\u011bru 0,01 mm\/s na sk\u0159\u00edni \u0161nekov\u00e9ho p\u0159evodu p\u0159isp\u00edv\u00e1 k hodnot\u011b Ra povrchu obrobku p\u0159ibli\u017en\u011b 0,02 a\u017e 0,05 \u00b5m.<\/p>\n

\n\n\n\n\n\n\n\n\n
Povrchov\u00e1 \u00faprava \u0161neku<\/th>\nVibrace s\u00edt\u011b<\/th>\nP\u0159\u00edsp\u011bvek Ra<\/th>\nVhodn\u00e9 pro c\u00edlov\u00e9 Ra<\/th>\nAplika\u010dn\u00ed stupe\u0148<\/th>\n<\/tr>\n<\/thead>\n
Ra 1,6 \u00b5m (odvalovan\u00e9)<\/td>\n0,08 \u2013 0,15 mm\/s<\/td>\n0,16 \u2013 0,75 \u00b5m<\/td>\npouze Ra > 1,6 \u00b5m<\/td>\nNepou\u017eiteln\u00e9 pro brou\u0161en\u00ed \u2013 pouze hrub\u00e9 obr\u00e1b\u011bn\u00ed<\/td>\n<\/tr>\n
Ra 0,4 \u00b5m (bruse)<\/td>\n0,02 \u2013 0,05 mm\/s<\/td>\n0,04 \u2013 0,25 \u00b5m<\/td>\nRa 0,4 \u2013 0,8 \u00b5m<\/td>\nBezhrot\u00e1 bruska, bruska na hrub\u00fd povrch<\/td>\n<\/tr>\n
Ra 0,2 \u00b5m (lapov\u00e1no)<\/td>\n0,005 \u2013 0,015 mm\/s<\/td>\n0,01 \u2013 0,08 \u00b5m<\/td>\nRa 0,1 \u2013 0,4 \u00b5m<\/td>\nP\u0159esn\u00e1 rovinn\u00e1 bruska, v\u00e1lcov\u00e1 bruska<\/td>\n<\/tr>\n
Ra 0,1 \u00b5m (superle\u0161t\u011bn\u00e9)<\/td>\n0,001 \u2013 0,005 mm\/s<\/td>\n0,002 \u2013 0,025 \u00b5m<\/td>\nRa 0,025 \u2013 0,1 \u00b5m<\/td>\nOptick\u00e9 le\u0161t\u011bn\u00ed, polovodi\u010dov\u00e9 desti\u010dky<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

Tabulka ukazuje hierarchii p\u0159esnosti: odvalovac\u00ed \u0161nekov\u00fd dopravn\u00edk s Ra 1,6 \u00b5m p\u0159isp\u00edv\u00e1 k drsnosti povrchu pouze vibracemi o 0,16 a\u017e 0,75 \u00b5m \u2013 co\u017e ho \u010din\u00ed nepou\u017eiteln\u00fdm pro jak\u00e9koli brou\u0161en\u00ed (p\u0159ekro\u010dil by celou hranici drsnosti povrchu je\u0161t\u011b p\u0159edt\u00edm, ne\u017e se brusn\u00fd kotou\u010d v\u016fbec dotkne obrobku). Brou\u0161en\u00e9 \u0161nekov\u00e9 dopravn\u00edky s Ra 0,4 \u00b5m jsou dosta\u010duj\u00edc\u00ed pro pr\u016fmyslov\u00e9 bezhrot\u00e9 a hrub\u00e9 brou\u0161en\u00ed povrchu. Lapovan\u00e9 \u0161nekov\u00e9 dopravn\u00edky s Ra 0,2 \u00b5m slou\u017e\u00ed pro p\u0159esn\u00e9 brou\u0161en\u00ed povrchu a v\u00e1lcov\u00e9 brou\u0161en\u00ed. Superjemn\u011b zpracovan\u00e9 \u0161nekov\u00e9 dopravn\u00edky s Ra 0,1 \u00b5m jsou vyhrazeny pro optick\u00e9 le\u0161t\u011bn\u00ed a polovodi\u010dov\u00e9 procesy, kde je c\u00edlov\u00e1 drsnost povrchu pod 0,1 \u00b5m.<\/p>\n

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Pozn\u00e1mka k in\u017een\u00fdrsk\u00e9mu stolu<\/div>\n

Korejsk\u00fd v\u00fdrobce p\u0159esn\u00fdch rovinn\u00fdch brusek obdr\u017eel st\u00ed\u017enosti od z\u00e1kazn\u00edka, v\u00fdrobce lo\u017eisek: brou\u0161en\u00e9 lo\u017eiskov\u00e9 dr\u00e1\u017eky vykazovaly periodick\u00e9 vln\u011bn\u00ed na frekvenci, kter\u00e1 neodpov\u00eddala ot\u00e1\u010dk\u00e1m brusn\u00e9ho kotou\u010de, ot\u00e1\u010dk\u00e1m obrobku ani frekvenci hydraulick\u00e9ho \u010derpadla. Vlnov\u00e1 d\u00e9lka vln\u011bn\u00ed byla 0,42 mm \u2013 co\u017e odpov\u00eddalo posuvu stolu na ot\u00e1\u010dku \u0161neku p\u0159i specifikovan\u00e9 rychlosti posuvu (pom\u011br dvojice \u0161nekov\u00fdch kol 30:1, stoup\u00e1n\u00ed vodic\u00edch \u0161roub\u016f 5 mm, jedna ot\u00e1\u010dka \u0161neku = 0,167 mm posuv stolu \u00d7 2,5 brousic\u00edch p\u0159ejezd\u016f na ot\u00e1\u010dku \u0161neku p\u0159i specifick\u00e9 kombinaci ot\u00e1\u010dek = vzor povrchu 0,42 mm). \u0160nekov\u00e1 kola byla b\u011bhem ned\u00e1vn\u00e9 gener\u00e1ln\u00ed opravy vym\u011bn\u011bna za brou\u0161en\u00fd \u0161nekov\u00fd p\u0159evod s Ra 0,35 \u00b5m \u2013 co\u017e spl\u0148ovalo specifikaci n\u00e1kupu \u201eRa pod 0,4 \u00b5m\u201c. M\u011b\u0159en\u00ed vibrac\u00ed v\u0161ak uk\u00e1zalo 0,04 mm\/s na frekvenci z\u00e1b\u011bru \u2013 na horn\u00ed hranici p\u0159ijateln\u00e9ho rozsahu pro c\u00edlovou povrchovou \u00fapravu lo\u017eiskov\u00fdch dr\u00e1\u017eek Ra 0,2 \u00b5m. P\u016fvodn\u00ed \u0161nek instalovan\u00fd ve v\u00fdrob\u011b byl lapov\u00e1n na Ra 0,18 \u00b5m s vibracemi 0,012 mm\/s. \u0158e\u0161en\u00ed: n\u00e1hradn\u00ed \u0161nek byl lapov\u00e1n na Ra 0,15 \u00b5m (dodate\u010dn\u00e9 n\u00e1klady 35 USD), vibrace se sn\u00ed\u017eily na 0,008 mm\/s a periodick\u00e9 vln\u011bn\u00ed zmizelo. Ponau\u010den\u00ed: specifikace \u0161neku brusky by m\u011bly krom\u011b povrchov\u00e9 \u00fapravy Ra uv\u00e1d\u011bt i limit vibrac\u00ed p\u0159i frekvenci s\u00edt\u011b (mm\/s RMS) \u2013 proto\u017ee dva \u0161neky se stejnou hodnotou Ra mohou zp\u016fsobovat r\u016fzn\u00e9 \u00farovn\u011b vibrac\u00ed v d\u016fsledku rozd\u00edl\u016f v p\u0159esnosti profilu zubu, kter\u00e9 hodnota Ra nezachycuje.<\/p>\n<\/div>\n

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Stabilita rychlosti \u2013 konzistentn\u00ed \u00fab\u011br materi\u00e1lu v cel\u00e9m brusn\u00e9m pr\u016fchodu<\/h2>\n

\"p\u0159esn\u00e9<\/p>\n

Krom\u011b vibrac\u00ed mus\u00ed ozuben\u00e1 dvojice poskytovat konzistentn\u00ed v\u00fdstupn\u00ed rychlost \u2013 proto\u017ee rychlost \u00fab\u011bru materi\u00e1lu p\u0159i brou\u0161en\u00ed je p\u0159\u00edmo \u00fam\u011brn\u00e1 rychlosti posuvu stolu. Pokud se posuv b\u011bhem k\u0159\u00ed\u017eov\u00e9ho pr\u016fchodu m\u011bn\u00ed o 2 procenta, hloubka \u0159ezu se m\u011bn\u00ed o 2 procenta, co\u017e vede k chyb\u011b tvaru, kter\u00e1 m\u016f\u017ee u p\u0159esn\u011b brou\u0161en\u00fdch sou\u010d\u00e1st\u00ed p\u0159ekro\u010dit celkovou toleranci. Stabilita rychlosti v rozmez\u00ed plus m\u00ednus 0,5 procenta vy\u017eaduje geometrii zubu t\u0159\u00eddy DIN 4 nebo lep\u0161\u00ed s chybou p\u0159enosu pod 5 \u00fahlov\u00fdch sekund mezi \u0161pi\u010dkami \u2013 stejn\u00fd stupe\u0148 p\u0159esnosti jako specifikace CNC oto\u010dn\u00e9ho stolu (\u010dl\u00e1nek A22), ale z jin\u00e9ho funk\u010dn\u00edho d\u016fvodu: p\u0159esnost polohy versus konzistence posuvu.<\/p>\n

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T\u0159i sk\u0159\u00edn\u011b \u0161nekov\u00fdch p\u0159evod\u016f brusn\u00fdch a le\u0161t\u00edc\u00edch stroj\u016f<\/h2>\n
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\"P\u0159esn\u011b<\/div>\n
\"detail<\/div>\n<\/div>\n

P\u0159\u00edpad 1 \u2013 Korejsk\u00e1 p\u0159esn\u00e1 rovinn\u00e1 bruska: c\u00edl Ra 0,2 \u00b5m, aplikace lo\u017eiskov\u00e9ho krou\u017eku<\/h3>\n

Korejsk\u00fd v\u00fdrobce rovinn\u00fdch brusek specifikoval dvojice \u0161nekov\u00fdch p\u0159evod\u016f pro pohon pod\u00e9ln\u00e9ho posuvu stolu p\u0159esn\u00e9 rovinn\u00e9 brusky pou\u017e\u00edvan\u00e9 pro dokon\u010dov\u00e1n\u00ed lo\u017eiskov\u00fdch krou\u017ek\u016f. C\u00edlov\u00e1 drsnost povrchu: Ra 0,2 \u00b5m. Velikost stolu: 600 \u00d7 300 mm. Rychlost posuvu: 1 a\u017e 15 m\/min (hydraulick\u00fd vratn\u00fd pohyb s k\u0159\u00ed\u017eov\u00fdm posuvem poh\u00e1n\u011bn\u00fdm \u0161nekov\u00fdm p\u0159evodem). Dvojice \u0161nekov\u00fdch p\u0159evod\u016f pro k\u0159\u00ed\u017eov\u00fd posuv: jednochod\u00fd, modul 1,5, osov\u00e1 vzd\u00e1lenost 30 mm, pom\u011br 30:1, lapovan\u00e9 Ra 0,15 \u00b5m, t\u0159\u00edda p\u0159esnosti DIN 4. Vibrace p\u0159i frekvenci z\u00e1b\u011bru: 0,008 mm\/s RMS (ov\u011b\u0159eno akcelerometrem b\u011bhem p\u0159ej\u00edmac\u00ed zkou\u0161ky ve v\u00fdrob\u011b). P\u0159\u00edsp\u011bvek Ra od vibrac\u00ed p\u0159evodu: p\u0159ibli\u017en\u011b 0,02 \u00b5m \u2013 spot\u0159eba 10 procent z rozpo\u010dtu 0,2 \u00b5m. Materi\u00e1l: cementovan\u00fd \u0161nek 18CrNiMo7-6, HRC 60, odst\u0159ediv\u011b lit\u00e9 kolo z fosforov\u00e9ho bronzu. Maz\u00e1n\u00ed: v\u0159etenov\u00fd olej ISO VG 32 (sd\u00edlen\u00fd s kluzn\u00fdmi veden\u00edmi stolu). Cena za p\u00e1r: 185 USD. Bruska konzistentn\u011b vyr\u00e1b\u011bla lo\u017eiskov\u00e9 dr\u00e1\u017eky s Ra 0,15 \u00b5m \u2013 co\u017e se pohodln\u011b pohybuje v r\u00e1mci c\u00edlov\u00e9 hodnoty 0,2 \u00b5m.<\/p>\n

P\u0159\u00edpad 2 \u2013 Japonsk\u00e1 le\u0161ti\u010dka optick\u00fdch \u010do\u010dek: Ra 0,05 \u00b5m, superle\u0161t\u011bn\u00fd \u0161nek, testov\u00e1no vibracemi<\/h3>\n

Japonsk\u00fd v\u00fdrobce optick\u00fdch za\u0159\u00edzen\u00ed specifikoval \u0161nekov\u00fd p\u0159evod pro pohon v\u0159etena automatizovan\u00e9ho le\u0161tic\u00edho stroje na \u010do\u010dky vyr\u00e1b\u011bj\u00edc\u00edho optiku pro kamery a mikroskopy. Rovinnost c\u00edlov\u00e9ho povrchu: 0,05 \u00b5m (jedna \u010dtvrtina vlnov\u00e9 d\u00e9lky viditeln\u00e9ho sv\u011btla). \u0160nekov\u00fd p\u0159evod poh\u00e1n\u011bl le\u0161tic\u00ed v\u0159eteno rychlost\u00ed 15 a\u017e 60 ot\/min s pom\u011brem 40:1. Vibra\u010dn\u00ed rozpo\u010det pro pohon: pod 0,003 mm\/s RMS p\u0159i frekvenci z\u00e1b\u011bru. \u0160nekov\u00fd p\u0159evod: jednochod\u00fd, modul 1, osov\u00e1 vzd\u00e1lenost 25 mm, pom\u011br 40:1, superjemn\u011bn\u00fd Ra 0,08 \u00b5m, t\u0159\u00edda p\u0159esnosti DIN 2. Ka\u017ed\u00fd p\u00e1r byl individu\u00e1ln\u011b testov\u00e1n vibracemi na specializovan\u00e9m zku\u0161ebn\u00edm za\u0159\u00edzen\u00ed v c\u00edlov\u00e9m rozsahu ot\u00e1\u010dek \u2013 p\u00e1ry p\u0159ekra\u010duj\u00edc\u00ed 0,003 mm\/s byly vy\u0159azeny (p\u0159ibli\u017en\u011b 15% m\u00edra vy\u0159azen\u00ed, co\u017e odr\u00e1\u017e\u00ed extr\u00e9mn\u00ed toleranci). Materi\u00e1l: nitridovan\u00fd \u0161nek 31CrMoV9, povrch HRC 62, odst\u0159ediv\u011b lit\u00fd c\u00ednov\u00fd bronz s p\u0159\u00eddavkem antimonu (vynikaj\u00edc\u00ed z\u00e1b\u011bhov\u00e9 vlastnosti pro minim\u00e1ln\u00ed po\u010d\u00e1te\u010dn\u00ed vibrace p\u0159i opot\u0159eben\u00ed). Cena za p\u00e1r: 680 USD (v\u010detn\u011b individu\u00e1ln\u00edho certifik\u00e1tu o vibra\u010dn\u00ed zkou\u0161ce). Proch\u00e1zet n\u00edzkovibra\u010dn\u00ed \u0161nekov\u00fd p\u0159evodov\u00fd pohon<\/a> mo\u017enosti pro p\u0159esn\u00e9 brou\u0161en\u00ed a optick\u00e9 le\u0161t\u011bn\u00ed.<\/p>\n

P\u0159\u00edpad 3 \u2013 Vietnamsk\u00e1 bezhrot\u00e1 bruska: Ra 0,8 \u00b5m, brou\u0161en\u00fd \u0161nek, objem v\u00fdroby<\/h3>\n

Vietnamsk\u00fd v\u00fdrobce obr\u00e1b\u011bc\u00edch stroj\u016f specifikoval dvojice \u0161nekov\u00fdch p\u0159evod\u016f pro pohon regula\u010dn\u00edch kol bezhrot\u00e9 brusky vyr\u00e1b\u011bj\u00edc\u00ed ocelov\u00e9 \u010depy a h\u0159\u00eddele. C\u00edlov\u00e1 drsnost povrchu: Ra 0,8 \u00b5m (pr\u016fmyslov\u00e1 jakost). Ot\u00e1\u010dky regula\u010dn\u00edch kol: 10 a\u017e 40 ot\/min. Motor: 0,75 kW \u0159\u00edzen\u00fd frekven\u010dn\u00edm m\u011bni\u010dem. P\u0159evodov\u00fd pom\u011br: 25:1. V\u00fdstupn\u00ed to\u010div\u00fd moment: 45 N\u00b7m. Uvoln\u011bn\u00e1 c\u00edlov\u00e1 drsnost povrchu Ra 0,8 \u00b5m umo\u017e\u0148ovala brou\u0161en\u00ed \u0161neku s drsnost\u00ed Ra 0,4 \u00b5m \u2013 vibra\u010dn\u00ed p\u0159\u00edsp\u011bvek p\u0159ibli\u017en\u011b 0,1 \u00b5m spot\u0159eboval pouze 12 procent z rozpo\u010dtu 0,8 \u00b5m. Lapov\u00e1n\u00ed nebylo nutn\u00e9 a p\u0159i t\u00e9to \u00farovni tolerance by p\u0159idalo 40 procent k cen\u011b p\u00e1ru bez m\u011b\u0159iteln\u00e9ho zlep\u0161en\u00ed kvality. Dvojice \u0161nekov\u00fdch p\u0159evod\u016f: jednochod\u00e1, modul 2, rozte\u010d 40 mm, t\u0159\u00edda p\u0159esnosti DIN 6. Materi\u00e1l: kalen\u00fd \u0161nek z uhl\u00edkov\u00e9 oceli, kolo z fosforov\u00e9ho bronzu. Ochrana chladic\u00ed kapaliny: t\u011bsn\u011bn\u00ed EPDM IP55 s ochranou proti st\u0159\u00edkaj\u00edc\u00ed vod\u011b (chladic\u00ed kapalina pro bezhrot\u00e9 brou\u0161en\u00ed je p\u0159iv\u00e1d\u011bna do brousic\u00ed z\u00f3ny, nikoli do pohonu). Cena za p\u00e1r: 52 USD. Ro\u010dn\u00ed produkce: 200 bezhrot\u00fdch brusek (200 p\u00e1r\u016f ro\u010dn\u011b). Specifikace ukazuje, \u017ee kvalita p\u00e1ru \u0161nekov\u00fdch kol brusn\u00e9ho stroje mus\u00ed odpov\u00eddat c\u00edli procesu \u2013 superfini\u0161ov\u00e1n\u00ed \u0161neku pro bezhrotou brusku s Ra 0,8 \u00b5m ztr\u00e1c\u00ed 70 procent dodate\u010dn\u00fdch n\u00e1klad\u016f na dokon\u010dovac\u00ed pr\u00e1ce.<\/p>\n

<\/p>\n

\u010casto kladen\u00e9 ot\u00e1zky<\/h2>\n
\n
\nOt\u00e1zka: Jak zm\u011b\u0159\u00edm p\u0159\u00edsp\u011bvek vibrac\u00ed \u0161nekov\u00e9ho p\u0159evodu na st\u00e1vaj\u00edc\u00ed brusce?<\/summary>\n

Namontujte akcelerometr na sk\u0159\u00ed\u0148 \u0161nekov\u00e9ho p\u0159evodu a zm\u011b\u0159te spektrum vibrac\u00ed b\u011bhem posuvu stolu (brusn\u00fd kotou\u010d ne\u0159e\u017ee \u2013 izolujte vibrace pohonu od vibrac\u00ed procesu). Identifikujte vrchol p\u0159i frekvenci z\u00e1b\u011bru \u0161neku (jednor\u00e1zov\u00fd chod: vrchol p\u0159i ot\u00e1\u010dk\u00e1ch \u0161neku v Hz). Porovnejte tuto amplitudu vrcholu (v mm\/s RMS) s tabulkou vibrac\u00ed ke kvalit\u011b povrchu, abyste odhadli p\u0159\u00edsp\u011bvek Ra. Pokud vrchol p\u0159ekra\u010duje rozpo\u010det pro c\u00edlovou kvalitu povrchu, bu\u010f vym\u011b\u0148te \u0161nek za jemn\u011bj\u0161\u00ed, nebo upravte vstupn\u00ed ot\u00e1\u010dky \u0161neku o 5 a\u017e 10 procent, abyste posunuli frekvenci z\u00e1b\u011bru sm\u011brem od struktur\u00e1ln\u00ed rezonance.<\/p>\n<\/details>\n

\nOt\u00e1zka: Ovliv\u0148uje materi\u00e1l \u0161nekov\u00e9ho p\u0159evodu vibrace?<\/summary>\n

Ano \u2013 materi\u00e1l kotou\u010de m\u00e1 v\u00fdznamn\u00fd vliv. Bronzov\u00e9 kotou\u010de tlum\u00ed vibrace s\u00edt\u011b vnit\u0159n\u00edm tlumen\u00edm materi\u00e1lu (bronz m\u00e1 vy\u0161\u0161\u00ed tlumic\u00ed kapacitu ne\u017e ocel). Kotou\u010de z POM a MC nylonu poskytuj\u00ed je\u0161t\u011b vy\u0161\u0161\u00ed tlumen\u00ed \u2013 3 a\u017e 5kr\u00e1t v\u00edce ne\u017e bronz \u2013 ale jsou omezeny na velmi n\u00edzk\u00e9 zat\u00ed\u017een\u00ed (pod 20 N\u00b7m). Pro p\u0159esn\u00e9 brusky se st\u0159edn\u00edm to\u010div\u00fdm momentem (20 a\u017e 80 N\u00b7m) je standardem bronz. Pro ultra p\u0159esn\u00e9 optick\u00e9 le\u0161t\u011bn\u00ed s velmi n\u00edzk\u00fdm to\u010div\u00fdm momentem (pod 10 N\u00b7m) mohou kotou\u010de z POM poskytnout dal\u0161\u00ed sn\u00ed\u017een\u00ed hluku o 2 a\u017e 4 dB(A) a m\u011b\u0159iteln\u011b ni\u017e\u0161\u00ed vibrace \u2013 ale za cenu krat\u0161\u00ed \u017eivotnosti kotou\u010de a ni\u017e\u0161\u00ed p\u0159esnosti polohov\u00e1n\u00ed v d\u016fsledku rozm\u011brov\u00e9 nestability plastu.<\/p>\n<\/details>\n

\nOt\u00e1zka: M\u016f\u017ee t\u0159en\u00ed chladic\u00ed kapaliny po\u0161kodit \u0161nekov\u00e9 soukol\u00ed?<\/summary>\n

Chladic\u00ed kapalina pro brou\u0161en\u00ed (obvykle ve vod\u011b rozpustn\u00e1 \u0159ezn\u00e1 kapalina o koncentraci 3 a\u017e 8 procent) je st\u0159edn\u011b korozivn\u00ed a obsahuje abrazivn\u00ed t\u0159\u00edsky (\u010d\u00e1stice rozemlet\u00e9ho kovu). Pokud se chladic\u00ed kapalina dostane do sk\u0159\u00edn\u011b \u0161nekov\u00e9ho p\u0159evodu p\u0159es degradovan\u00e1 t\u011bsn\u011bn\u00ed, vznikaj\u00ed dva probl\u00e9my: obsah vody emulguje v\u0159etenov\u00fd olej (sn\u00ed\u017e\u00ed maz\u00e1n\u00ed) a \u010d\u00e1stice t\u0159\u00edsek p\u016fsob\u00ed jako lapovac\u00ed pasta na povrchy zub\u016f ozuben\u00e9ho kola (urychluje opot\u0159eben\u00ed a zvy\u0161uje v\u016fli). V\u00fdsledek je m\u011b\u0159iteln\u00fd b\u011bhem n\u011bkolika m\u011bs\u00edc\u016f \u2013 zvy\u0161uj\u00ed se vibrace a zhor\u0161uje se kvalita povrchu. Standardn\u00ed ochranou jsou t\u011bsn\u011bn\u00ed z EPDM (odoln\u00e1 v\u016f\u010di ve vod\u011b rozpustn\u00e9 chladic\u00ed kapalin\u011b) a pozitivn\u00ed proplachov\u00e1n\u00ed vzduchem na vstupu h\u0159\u00eddele. \u00da\u010dinnost t\u011bsn\u011bn\u00ed se sleduje anal\u00fdzou oleje ka\u017ed\u00fdch 6 m\u011bs\u00edc\u016f (obsah vody pod 0,05 procenta, po\u010det \u010d\u00e1stic pod ISO 18\/16\/13).<\/p>\n<\/details>\n

\nOt\u00e1zka: Pro\u010d je t\u0159eba u \u0161neku krom\u011b drsnosti povrchu (Ra) specifikovat i vibrace (mm\/s)?<\/summary>\n

Povrchov\u00e1 \u00faprava Ra m\u011b\u0159\u00ed pr\u016fm\u011brnou drsnost povrchu z\u00e1vitu \u0161neku \u2013 ud\u00e1v\u00e1, jak hladk\u00fd je povrch na mikrogeometrick\u00e9 \u00farovni. Vibrace (mm\/s p\u0159i s\u00ed\u0165ov\u00e9 frekvenci) m\u011b\u0159\u00ed dynamick\u00e9 buzen\u00ed, kter\u00e9 dvojice \u0161nekov\u00fdch kol produkuje b\u011bhem ot\u00e1\u010den\u00ed \u2013 ud\u00e1v\u00e1, jak moc dvojice chv\u011bje strojem. Dva \u0161neky se stejn\u00fdmi hodnotami Ra mohou produkovat r\u016fzn\u00e9 \u00farovn\u011b vibrac\u00ed, proto\u017ee vibrace z\u00e1vis\u00ed tak\u00e9 na p\u0159esnosti profilu zubu, p\u0159esnosti stoup\u00e1n\u00ed a soust\u0159ednosti \u2013 parametrech, kter\u00e9 Ra nezahrnuje. U brou\u0161en\u00ed je specifikace vibrac\u00ed p\u0159\u00edmo relevantn\u011bj\u0161\u00ed pro kvalitu hotov\u00e9ho povrchu ne\u017e samotn\u00e9 Ra \u0161neku. Specifikujte oboj\u00ed: Ra pro kontrolu v\u00fdroby, vibrace pro funk\u010dn\u00ed ov\u011b\u0159en\u00ed.<\/p>\n<\/details>\n

\nOt\u00e1zka: Jak\u00e1 je typick\u00e1 \u017eivotnost \u0161nekov\u00e9ho ozuben\u00e9ho kola brusky?<\/summary>\n

Brusky b\u011b\u017e\u00ed 2 000 a\u017e 4 000 hodin ro\u010dn\u011b s p\u0159eru\u0161ovan\u00fdm posuvem (\u0161nekov\u00fd soukol\u00ed pracuje b\u011bhem indexov\u00fdch zdvih\u016f k\u0159\u00ed\u017eov\u00e9ho posuvu, nikoli nep\u0159etr\u017eit\u011b). P\u0159i tomto provozu a n\u00edzk\u00fdch to\u010div\u00fdch momentech typick\u00fdch pro brou\u0161en\u00ed (10 a\u017e 80 N\u00b7m) vydr\u017e\u00ed bronzov\u00fd kotou\u010d 8 a\u017e 15 let. Faktorem omezuj\u00edc\u00edm \u017eivotnost je sp\u00ed\u0161e degradace vibracemi ne\u017e v\u016fle \u2013 s opot\u0159eben\u00edm kotou\u010de se m\u011bn\u00ed kontaktn\u00ed vzor a zvy\u0161uje se buzen\u00ed v z\u00e1b\u011bru. Kdy\u017e vibrace na frekvenci z\u00e1b\u011bru stoupnou na dvojn\u00e1sobek p\u016fvodn\u00ed hodnoty, kvalita povrchu se za\u010dne zhor\u0161ovat. V\u00fdm\u011bnu kotou\u010de napl\u00e1nujte, kdy\u017e se vibrace zdvojn\u00e1sob\u00ed \u2013 obvykle p\u0159i 60 a\u017e 70 procentech mechanick\u00e9 \u017eivotnosti omezen\u00e9 v\u016fl\u00ed.<\/p>\n<\/details>\n<\/div>\n

<\/p>\n

Brusky a le\u0161ti\u010dky pracuj\u00ed na nejvy\u0161\u0161\u00ed hranici spektra p\u0159esnosti v\u00fdroby \u2013 a \u0161nekov\u00fd p\u0159evod poh\u00e1n\u011bj\u00edc\u00ed posuv stolu nebo v\u0159eteno je jednou z m\u00e1la sou\u010d\u00e1st\u00ed, jejich\u017e vibra\u010dn\u00ed charakteristiku lze p\u0159\u00edmo m\u011b\u0159it na povrchu hotov\u00e9ho obrobku. Anal\u00fdza vibrac\u00ed v pom\u011bru k kvalit\u011b povrchu (ka\u017ed\u00e1 vibrace o velikosti s\u00edt\u011b 0,01 mm\/s p\u0159id\u00e1v\u00e1 k povrchu Ra 0,02 a\u017e 0,05 \u00b5m) kvantifikuje, pro\u010d jsou odvalovan\u00e9 \u0161neky nepou\u017eiteln\u00e9 pro brou\u0161en\u00ed, brou\u0161en\u00e9 \u0161neky slou\u017e\u00ed pro pr\u016fmyslov\u00e9 brou\u0161en\u00ed, lapovan\u00e9 \u0161neky slou\u017e\u00ed pro p\u0159esn\u00e9 brou\u0161en\u00ed a superjemn\u011b zjemn\u011bn\u00e9 \u0161neky slou\u017e\u00ed pro optick\u00e9 le\u0161t\u011bn\u00ed. Mezn\u00ed hodnota vibrac\u00ed p\u0159i frekvenci s\u00edt\u011b (mm\/s RMS) by m\u011bla b\u00fdt specifikov\u00e1na spolu s povrchovou \u00fapravou \u0161neku (Ra \u00b5m) \u2013 proto\u017ee samotn\u00e1 hodnota Ra nep\u0159edpov\u00edd\u00e1 vibra\u010dn\u00ed v\u00fdkon. Pro v\u00fdrobce brusek specifikace \u0161nekov\u00e9ho p\u0159evodu ur\u010duje nejlep\u0161\u00ed povrchovou \u00fapravu, kter\u00e9 m\u016f\u017ee stroj dos\u00e1hnout \u2013 je to sou\u010d\u00e1st definuj\u00edc\u00ed schopnosti, nikoli pouze hnac\u00ed prvek.<\/p>\n

Pro v\u00fdrobce brusn\u00fdch a le\u0161tic\u00edch stroj\u016f poskytuje na\u0161e technick\u00e9 odd\u011blen\u00ed p\u00e1ry \u0161nekov\u00fdch p\u0159evod\u016f s individu\u00e1ln\u00edmi certifik\u00e1ty o vibra\u010dn\u00edch zkou\u0161k\u00e1ch pro p\u0159esn\u00e9 aplikace. Standardn\u00ed katalog p\u0159esn\u00e9 \u0161nekov\u00e9 p\u0159evodovky<\/a> zahrnuj\u00ed brou\u0161en\u00e9, lapovan\u00e9 a superjemn\u011b zu\u0161lecht\u011bn\u00e9 konfigurace s p\u0159esnost\u00ed DIN t\u0159\u00eddy 2 a\u017e 6. Ode\u0161lete specifikace brusn\u00e9ho pohonu<\/a> s c\u00edlovou drsnost\u00ed povrchu, rozsahem rychlosti stolu a vibra\u010dn\u00edm rozpo\u010dtem.<\/p>\n

<\/p>\n

\n

Specifikace p\u00e1r\u016f \u0161nekov\u00fdch p\u0159evod\u016f pro brusky nebo le\u0161ti\u010dky?<\/h3>\n

Za\u0161lete c\u00edlovou drsnost povrchu (Ra), ot\u00e1\u010dky stolu nebo v\u0159etena, vibra\u010dn\u00ed bilanci (pokud je zn\u00e1ma) a typ brou\u0161en\u00ed (ploch\u00e9, v\u00e1lcov\u00e9, bezhrot\u00e9, optick\u00e9). Doporu\u010d\u00edme t\u0159\u00eddu povrchov\u00e9 \u00fapravy \u0161neku, t\u0159\u00eddu DIN a pro p\u0159esn\u00e9 aplikace poskytneme individu\u00e1ln\u00ed certifik\u00e1ty vibra\u010dn\u00edch zkou\u0161ek.<\/p>\n

Vy\u017e\u00e1dejte si specifikaci brusn\u00e9ho pohonu \u2192<\/a><\/p>\n<\/div>\n

St\u0159iha\u010d: Cxm<\/p>\n<\/div>","protected":false},"excerpt":{"rendered":"

Korea Ever-Power \u00b7 Application Engineering Guide Worm and Worm Wheel for Grinding and Polishing Machine Drives An optical lens polisher produces a surface flatness of 0.05 \u00b5m \u2014 roughly one-thousandth the thickness of a human hair. At this scale, every source of vibration in the machine leaves its signature on the finished surface. The worm […]<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":"","footnotes":""},"categories":[2821],"tags":[],"class_list":["post-1422","post","type-post","status-publish","format-standard","hentry","category-worm-and-worm-wheel"],"_links":{"self":[{"href":"https:\/\/worm-and-worm-wheel.com\/cs\/wp-json\/wp\/v2\/posts\/1422","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/worm-and-worm-wheel.com\/cs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/worm-and-worm-wheel.com\/cs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/worm-and-worm-wheel.com\/cs\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/worm-and-worm-wheel.com\/cs\/wp-json\/wp\/v2\/comments?post=1422"}],"version-history":[{"count":1,"href":"https:\/\/worm-and-worm-wheel.com\/cs\/wp-json\/wp\/v2\/posts\/1422\/revisions"}],"predecessor-version":[{"id":1425,"href":"https:\/\/worm-and-worm-wheel.com\/cs\/wp-json\/wp\/v2\/posts\/1422\/revisions\/1425"}],"wp:attachment":[{"href":"https:\/\/worm-and-worm-wheel.com\/cs\/wp-json\/wp\/v2\/media?parent=1422"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/worm-and-worm-wheel.com\/cs\/wp-json\/wp\/v2\/categories?post=1422"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/worm-and-worm-wheel.com\/cs\/wp-json\/wp\/v2\/tags?post=1422"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}