{"id":1424,"date":"2026-06-29T03:45:54","date_gmt":"2026-06-29T03:45:54","guid":{"rendered":"https:\/\/worm-and-worm-wheel.com\/?p=1424"},"modified":"2026-06-29T03:45:54","modified_gmt":"2026-06-29T03:45:54","slug":"worm-and-worm-wheel-for-milling-machine-and-lathe-feed-drives","status":"publish","type":"post","link":"https:\/\/worm-and-worm-wheel.com\/cs\/worm-and-worm-wheel-for-milling-machine-and-lathe-feed-drives\/","title":{"rendered":"\u0160nek a \u0161nekov\u00e9 kolo pro pohony posuvu fr\u00e9zek a soustruh\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 posuvu fr\u00e9zek a soustruh\u016f<\/h1>\n

Fr\u00e9za zab\u00edr\u00e1 s ocelov\u00fdm obrobkem tangenci\u00e1ln\u00ed \u0159eznou silou 2 000 N. Slo\u017eka t\u00e9to s\u00edly p\u016fsob\u00edc\u00ed ve sm\u011bru posuvu \u2013 400 a\u017e 800 N v z\u00e1vislosti na geometrii fr\u00e9zy \u2013 tla\u010d\u00ed dozadu skrz vodic\u00ed \u0161roub, skrz \u0161nekov\u00fd p\u0159evod a sna\u017e\u00ed se zrychlit st\u016fl do fr\u00e9zy. Pokud pohon posuvu toto zrychlen\u00ed dovol\u00ed, n\u00e1stroj se zar\u00fdv\u00e1 hloub\u011bji, s\u00edla se zv\u011bt\u0161uje a st\u016fl se d\u00e1le zrychluje \u2013 doch\u00e1z\u00ed k samosvorn\u00e9mu n\u00e1razu, kter\u00fd oh\u00fdb\u00e1 n\u00e1stroje a po\u0161kozuje stroje. Samosvorn\u00fd \u0161nekov\u00fd p\u0159evod je mechanickou bari\u00e9rou, kter\u00e1 t\u00e9to nestabilit\u011b sm\u011bru posuvu zabra\u0148uje.<\/p>\n

Promluvte si s technikem posuvu pro obr\u00e1b\u011bc\u00ed stroje \u2192<\/a><\/p>\n<\/div>\n

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

Pohony posuvu fr\u00e9zek a soustruh\u016f pou\u017e\u00edvaj\u00ed \u0161nekov\u00e9 p\u0159evody pro dv\u011b sou\u010dasn\u00e9 funkce: \u0159\u00edzen\u00e9 sn\u00ed\u017een\u00ed posuvu (p\u0159evod ot\u00e1\u010dek motoru na pomal\u00fd, st\u00e1l\u00fd pohyb stolu nebo voz\u00edku b\u011bhem \u0159ez\u00e1n\u00ed) a samosvornou bezpe\u010dnost (zabra\u0148uj\u00edc\u00ed zp\u011btn\u00e9mu pohybu posuvn\u00e9ho mechanismu \u0159ezn\u00fdmi silami a vtahov\u00e1n\u00ed obrobku do n\u00e1stroje). Anal\u00fdza zp\u011btn\u00e9 vazby \u0159ezn\u00e9 s\u00edly sleduje, jak se tangenci\u00e1ln\u00ed, radi\u00e1ln\u00ed a axi\u00e1ln\u00ed slo\u017eky \u0159ezn\u00e9 s\u00edly p\u0159em\u011b\u0148uj\u00ed na zp\u011btn\u00fd to\u010div\u00fd moment na \u0161nekov\u00e9m p\u0159evodu \u2013 a ukazuje, \u017ee pouze samosvorn\u00e1 geometrie \u0161neku (jednor\u00e1zov\u00fd chod, \u00fahel stoup\u00e1n\u00ed pod \u00fahlem t\u0159en\u00ed) spolehliv\u011b absorbuje tento to\u010div\u00fd moment za v\u0161ech \u0159ezn\u00fdch podm\u00ednek. P\u0159esnost posuvu z\u00e1vis\u00ed na chyb\u011b stoup\u00e1n\u00ed \u0161neku: chyba stoup\u00e1n\u00ed 10 \u00b5m na ot\u00e1\u010dku \u0161neku zp\u016fsobuje periodickou zm\u011bnu rychlosti posuvu, kter\u00e1 se projevuje jako vlnitost povrchu p\u0159i frekvenci ot\u00e1\u010den\u00ed \u0161neku. Brou\u0161en\u00e9 \u0161neky (Ra 0,3 a\u017e 0,4 \u00b5m, chyba stoup\u00e1n\u00ed pod 5 \u00b5m) zaji\u0161\u0165uj\u00ed stabilitu posuvu v rozmez\u00ed plus m\u00ednus 1 procenta; Odvalovac\u00ed \u0161neky (Ra 1,6 \u00b5m, chyba stoup\u00e1n\u00ed 15 a\u017e 25 \u00b5m) zp\u016fsobuj\u00ed odchylku plus m\u00ednus 3 a\u017e 5 procent, kter\u00e1 je viditeln\u00e1 jako povrchov\u00e1 vlnitost hotov\u00e9ho d\u00edlu.<\/p>\n<\/div>\n

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Pro\u010d pohony posuvu fr\u00e9zek a soustruh\u016f pou\u017e\u00edvaj\u00ed \u0161nekov\u00e9 p\u0159evody<\/h2>\n

\"Z\u00e1b\u011br<\/p>\n

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Pohon posuvu obr\u00e1b\u011bc\u00edho stroje p\u0159ev\u00e1d\u00ed rotaci motoru na pomal\u00fd, \u0159\u00edzen\u00fd line\u00e1rn\u00ed pohyb pracovn\u00edho stolu (fr\u00e9zov\u00e1n\u00ed) nebo p\u0159\u00ed\u010dn\u00e9ho suportu (soustruh) b\u011bhem obr\u00e1b\u011bn\u00ed kovu. Rychlost posuvu \u2013 obvykle 10 a\u017e 500 mm za minutu \u2013 ur\u010duje kvalitu obroben\u00e9 plochy, tlou\u0161\u0165ku t\u0159\u00edsky a \u017eivotnost n\u00e1stroje. \u0160nekov\u00fd p\u0159evod je um\u00edst\u011bn mezi posuvov\u00fdm motorem a vodic\u00edm \u0161roubem a zaji\u0161\u0165uje jak sn\u00ed\u017een\u00ed ot\u00e1\u010dek, tak i kl\u00ed\u010dovou samosvornou bezpe\u010dnostn\u00ed funkci.<\/p>\n

Na rozd\u00edl od aplikace s oto\u010dn\u00fdm stolem (\u010dl\u00e1nek A22), kde polohov\u00e1n\u00ed a dr\u017een\u00ed zaji\u0161\u0165uje dvojice \u0161nekov\u00fdch p\u0159evod\u016f, se dvojice pohon\u016f posuvu b\u011bhem \u0159ez\u00e1n\u00ed pohybuje nep\u0159etr\u017eit\u011b \u2013 prim\u00e1rn\u00edmi specifika\u010dn\u00edmi parametry jsou tedy konzistence rychlosti posuvu a absorpce \u0159ezn\u00e9 s\u00edly.<\/p>\n<\/div>\n

\"Samosvorn\u00fd<\/div>\n<\/div>\n
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Prevence vta\u017een\u00ed<\/div>\n

Samosvornost absorbuje slo\u017eku \u0159ezn\u00e9 s\u00edly ve sm\u011bru posuvu, kter\u00e1 se sna\u017e\u00ed urychlit obrobek do fr\u00e9zy. Bez samosvornosti m\u016f\u017ee konven\u010dn\u00ed nebo sousledn\u00e9 fr\u00e9zov\u00e1n\u00ed zp\u016fsobit samozesiluj\u00edc\u00ed se zrychlen\u00ed posuvu, kter\u00e9 po\u0161kozuje n\u00e1stroj, obrobek a v\u0159eteno stroje \u2013 a m\u016f\u017ee tak zranit obsluhu.<\/p>\n<\/div>\n

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Plynul\u00e1 rychlost posuvu<\/div>\n

Kluzn\u00fd kontakt \u0161neku a \u0161nekov\u00e9ho kola zaji\u0161\u0165uje inherentn\u011b plynulej\u0161\u00ed ot\u00e1\u010den\u00ed ne\u017e u \u010deln\u00edch ozuben\u00fdch kol \u2013 co\u017e se prom\u00edt\u00e1 do plynulej\u0161\u00ed rychlosti posuvu s men\u0161\u00ed periodickou zm\u011bnou. Plynulost rychlosti posuvu p\u0159\u00edmo ur\u010duje kvalitu obroben\u00e9 plochy: 2% zm\u011bna posuvu zp\u016fsob\u00ed 2% zm\u011bnu tlou\u0161\u0165ky t\u0159\u00edsky, kter\u00e1 se projev\u00ed jako vlnitost na obroben\u00e9m povrchu.<\/p>\n<\/div>\n

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Vysok\u00fd pom\u011br v kompaktn\u00edm proveden\u00ed<\/div>\n

\u0160nekov\u00fd p\u0159evod s p\u0159evodem 40:1 p\u0159ev\u00e1d\u00ed ot\u00e1\u010dky motoru s 1 450 ot.\/min. na 36 ot.\/min. u vodic\u00edho \u0161roubu \u2013 \u010d\u00edm\u017e dosahuje rychlosti posuvu 180 mm\/min prost\u0159ednictv\u00edm vodic\u00edho \u0161roubu s rozte\u010d\u00ed 5 mm. Tento jednostup\u0148ov\u00fd p\u0159evod se vejde do sloupku nebo z\u00e1st\u011bny stroje, ani\u017e by zv\u011bt\u0161oval jeho rozm\u011bry. \u010celn\u00ed ozuben\u00e1 kola pot\u0159ebuj\u00ed pro stejn\u00fd p\u0159evod 3 a\u017e 4 stupn\u011b.<\/p>\n<\/div>\n<\/div>\n

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Anal\u00fdza zp\u011btn\u00e9 vazby \u0159ezn\u00e9 s\u00edly \u2013 jak se \u0159ezn\u00e9 s\u00edly sna\u017e\u00ed posunout posuv zp\u011bt<\/h2>\n

B\u011bhem \u0159ez\u00e1n\u00ed kovu p\u016fsob\u00ed na obrobek v bod\u011b \u0159ezu t\u0159i ortogon\u00e1ln\u00ed slo\u017eky s\u00edly. Slo\u017eka, kter\u00e1 je v ose posuvu, je pro \u0161nekov\u00fd p\u0159evod kritick\u00e1, proto\u017ee se sna\u017e\u00ed poh\u00e1n\u011bt posuvn\u00fd mechanismus zp\u011bt prost\u0159ednictv\u00edm vodic\u00edho \u0161roubu.<\/p>\n

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\u0158ezn\u00e1 s\u00edla \u2192 Zp\u011btn\u00fd pohon kroutic\u00edho momentu \u0159et\u011bzu<\/div>\n
Ft = tangenci\u00e1ln\u00ed \u0159ezn\u00e1 s\u00edla (N) \u2190 materi\u00e1l, hloubka, rychlost<\/span><\/div>\n
Ff = s\u00edla ve sm\u011bru posuvu = Ft \u00d7 k_posuvu \u2190 k_feed = 0,3 a\u017e 0,6 pro fr\u00e9zov\u00e1n\u00ed<\/span><\/div>\n
F_\u0161roub = Ff \u00d7 \u03b7_posuv \u2190 \u03b7_slide = 0,8 a\u017e 0,95 (ztr\u00e1ta t\u0159en\u00edm p\u0159i kluzu)<\/span><\/div>\n
T_zp\u011btn\u00fd_\u0161roub = F_\u0161roub \u00d7 p_p\u0159edp\u011bt\u00ed \/ (2 \u00d7 \u03c0 \u00d7 \u03b7_\u0161roub)<\/div>\n
T_backdrv mus\u00ed b\u00fdt < T_samostatn\u00e1 brzda \u0161nekov\u00e9ho kola<\/div>\n
p_lead = stoup\u00e1n\u00ed vodic\u00edho \u0161roubu (mm)<\/div>\n
\u03b7_\u0161roub = \u00fa\u010dinnost vodic\u00edho \u0161roubu (0,3 a\u017e 0,9 v z\u00e1vislosti na typu \u0161roubu)<\/div>\n
T_samostatn\u00e9 uzam\u010den\u00ed = maxim\u00e1ln\u00ed to\u010div\u00fd moment, kter\u00fd \u0161nekov\u00fd p\u00e1r absorbuje bez zp\u011btn\u00e9ho pohybu<\/div>\n<\/div>\n

N\u00ed\u017ee uveden\u00e1 tabulka sleduje \u0159et\u011bzec sil od \u0159ezn\u00fdch parametr\u016f a\u017e po zp\u011btn\u00fd to\u010div\u00fd moment pro t\u0159i b\u011b\u017en\u00e9 sc\u00e9n\u00e1\u0159e obr\u00e1b\u011bn\u00ed \u2013 ukazuje, pro\u010d je samosvorn\u00e9 za\u0159\u00edzen\u00ed nezbytn\u00e9 a pro\u010d jsou konven\u010dn\u00ed (nesamosvorn\u00e9) ozuben\u00e9 pohony nebezpe\u010dn\u00e9 pro fr\u00e9zovac\u00ed posuvov\u00e9 aplikace.<\/p>\n

\n\n\n\n\n\n\n\n
Sc\u00e9n\u00e1\u0159<\/th>\nStopy (N)<\/th>\nFf (N)<\/th>\nT_backdrv (N\u00b7m)<\/th>\nSamosvorn\u00e9 chyty?<\/th>\nBez samosvorn\u00e9ho mechanismu<\/th>\n<\/tr>\n<\/thead>\n
Lehk\u00e9 fr\u00e9zov\u00e1n\u00ed (hlin\u00edk, 2 mm DOC)<\/td>\n500<\/td>\n200<\/td>\n0.8<\/td>\nAno \u2713<\/td>\nM\u00edrn\u00e9 posunut\u00ed stolu, drobn\u00e9 povrchov\u00e9 stopy<\/td>\n<\/tr>\n
St\u0159edn\u00ed fr\u00e9zov\u00e1n\u00ed (ocel, 4 mm DOC)<\/td>\n2,000<\/td>\n800<\/td>\n3.2<\/td>\nAno \u2713<\/td>\nZrychlen\u00ed stolu \u2192 zlomen\u00ed n\u00e1stroje<\/td>\n<\/tr>\n
T\u011b\u017ek\u00e9 fr\u00e9zov\u00e1n\u00ed (ocel, 8 mm DOC, stoup\u00e1n\u00ed)<\/td>\n5,000<\/td>\n2,500<\/td>\n10.0<\/td>\nAno \u2713<\/td>\nPrudk\u00e9 vta\u017een\u00ed \u2192 p\u00e1d v\u0159etena \u26a0<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

Anal\u00fdza ukazuje, \u017ee i p\u0159i t\u011b\u017ek\u00e9m sousledn\u00e9m fr\u00e9zov\u00e1n\u00ed s tangenci\u00e1ln\u00ed silou 5 000 N vznik\u00e1 na \u0161nekov\u00e9m soukol\u00ed pouze 10 N\u00b7m zp\u011btn\u00e9ho to\u010div\u00e9ho momentu \u2013 co\u017e je v r\u00e1mci samosvorn\u00e9 kapacity jak\u00e9hokoli standardn\u00edho jednochod\u00e9ho p\u00e1ru (kter\u00fd odol\u00e1v\u00e1 zp\u011btn\u00fdm to\u010div\u00fdm moment\u016fm a\u017e do pln\u00e9ho jmenovit\u00e9ho v\u00fdstupn\u00edho to\u010div\u00e9ho momentu, obvykle 50 a\u017e 500 N\u00b7m pro velikosti posuvu obr\u00e1b\u011bc\u00edch stroj\u016f). \u0160nekov\u00e9 soukol\u00ed absorbuje celou \u0159eznou s\u00edlu ve sm\u011bru posuvu bez jak\u00e9hokoli nam\u00e1h\u00e1n\u00ed. D\u016fsledky selh\u00e1n\u00ed zp\u011btn\u00e9ho pohonu jsou v\u0161ak z\u00e1va\u017en\u00e9: obrobek zrychluje do fr\u00e9zy p\u0159i pln\u00e9 rychlosti stoup\u00e1n\u00ed vodic\u00edho \u0161roubu, co\u017e zp\u016fsob\u00ed n\u00e1raz, kter\u00fd m\u016f\u017ee zlomit n\u00e1stroj, po\u0161kodit v\u0159eteno a zranit obsluhu. Rozp\u011bt\u00ed samosvorn\u00e9 kapacity nen\u00ed margin\u00e1ln\u00ed \u2013 je navr\u017eeno tak, aby bylo ohromuj\u00edc\u00ed.<\/p>\n

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P\u0159esnost posuvu \u2013 jak chyba stoup\u00e1n\u00ed \u0161neku zp\u016fsobuje vlnitost povrchu<\/h2>\n

\"P\u0159esnost<\/p>\n

Rychlost posuvu ur\u010duje tlou\u0161\u0165ku t\u0159\u00edsky a t\u00edm i kvalitu povrchu: dokonale konstantn\u00ed rychlost posuvu vytv\u00e1\u0159\u00ed dokonale rovnom\u011brnou t\u0159\u00edsku, kter\u00e1 vytv\u00e1\u0159\u00ed hladk\u00fd povrch. Prom\u011bnn\u00e1 rychlost posuvu vytv\u00e1\u0159\u00ed prom\u011bnnou tlou\u0161\u0165ku t\u0159\u00edsky, kter\u00e1 vytv\u00e1\u0159\u00ed zvln\u011bn\u00fd povrch s periodou odpov\u00eddaj\u00edc\u00ed frekvenci zm\u011bn.<\/p>\n

Chyba v \u0161neku zp\u016fsobuje periodick\u00e9 kol\u00eds\u00e1n\u00ed pod\u00e1v\u00e1n\u00ed.<\/strong> Pokud m\u00e1 \u0161nek kumulativn\u00ed chybu stoup\u00e1n\u00ed 15 \u00b5m na jednu ot\u00e1\u010dku, rychlost posuvu se m\u011bn\u00ed o 15 \u00b5m na ot\u00e1\u010dku. P\u0159i pom\u011bru 40:1 s vodic\u00edm \u0161roubem s rozte\u010d\u00ed 5 mm posune jedna ot\u00e1\u010dka \u0161neku st\u016fl o 0,125 mm. Chyba 15 \u00b5m na vzd\u00e1lenost 0,125 mm p\u0159edstavuje okam\u017eitou zm\u011bnu posuvu o 12 procent \u2013 \u200b\u200bco\u017e vede k 12% zm\u011bn\u011b tlou\u0161\u0165ky t\u0159\u00edsky, kter\u00e1 je na obr\u00e1b\u011bn\u00e9m povrchu viditeln\u00e1 jako periodick\u00e9 zvln\u011bn\u00ed s vlnovou d\u00e9lkou 0,125 mm. Pro jemn\u00e9 obr\u00e1b\u011bn\u00ed, kde drsnost povrchu Ra mus\u00ed b\u00fdt men\u0161\u00ed ne\u017e 1,6 \u00b5m, je toto zvln\u011bn\u00ed nep\u0159ijateln\u00e9.<\/p>\n

Brou\u0161en\u00e9 \u0161neky s chybou stoup\u00e1n\u00ed pod 5 \u00b5m na ot\u00e1\u010dku sni\u017euj\u00ed kol\u00eds\u00e1n\u00ed posuvu pod 4 procenta \u2013 v r\u00e1mci p\u0159ijateln\u00e9ho rozsahu pro v\u0161eobecn\u00e9 obr\u00e1b\u011bn\u00ed (drsnost povrchu Ra 1,6 a\u017e 3,2 \u00b5m). Pro p\u0159esn\u00e9 dokon\u010dov\u00e1n\u00ed (Ra pod 0,8 \u00b5m) se specifikuj\u00ed lapovan\u00e9 \u0161neky s chybou stoup\u00e1n\u00ed pod 2 \u00b5m. Chyba stoup\u00e1n\u00ed se li\u0161\u00ed od kvality povrchu: \u0161nek m\u016f\u017ee m\u00edt hladkou kvalitu povrchu Ra 0,4 \u00b5m, ale n\u00edzkou p\u0159esnost stoup\u00e1n\u00ed (chyba 10+ \u00b5m) v d\u016fsledku geometrick\u00fdch chyb odvalovac\u00ed fr\u00e9zky. Chyba stoup\u00e1n\u00ed mus\u00ed b\u00fdt ov\u011b\u0159ena p\u0159\u00edm\u00fdm m\u011b\u0159en\u00edm na specializovan\u00e9m p\u0159\u00edstroji pro m\u011b\u0159en\u00ed stoup\u00e1n\u00ed \u2013 nen\u00ed odvozena z hodnoty drsnosti povrchu.<\/p>\n

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

Korejsk\u00fd v\u00fdrobce kolenov\u00fdch fr\u00e9z obdr\u017eel st\u00ed\u017enosti z praxe na periodick\u00e9 zvln\u011bn\u00ed povrchu na ose Y (p\u0159\u00ed\u010dn\u00fd posuv) b\u011bhem \u010deln\u00edho fr\u00e9zov\u00e1n\u00ed. Vln\u011bn\u00ed se projevovalo jako pravideln\u00fd vzor s vlnovou d\u00e9lkou p\u0159ibli\u017en\u011b 0,13 mm \u2013 co\u017e odpov\u00edd\u00e1 posuvu stolu na ot\u00e1\u010dku \u0161neku (nomin\u00e1ln\u00ed hodnota 0,125 mm p\u0159i pou\u017eit\u00e9 rychlosti posuvu). Kontrola \u0161neku odhalila kumulativn\u00ed chybu stoup\u00e1n\u00ed 18 \u00b5m na jednu ot\u00e1\u010dku \u2013 v r\u00e1mci standardn\u00ed tolerance dodavatele, ale s 14% odchylkou posuvu. Osa X (pod\u00e9ln\u00fd posuv) nevykazovala \u017e\u00e1dn\u00e9 zvln\u011bn\u00ed \u2013 jej\u00ed \u0161nek m\u011bl chybu stoup\u00e1n\u00ed 4 \u00b5m (z jin\u00e9 v\u00fdrobn\u00ed \u0161ar\u017ee s p\u0159\u00edsn\u011bj\u0161\u00ed kontrolou procesu). Oba \u0161neky m\u011bly stejn\u00e9 \u010d\u00edslo d\u00edlu od stejn\u00e9ho dodavatele \u2013 chyba stoup\u00e1n\u00ed nebyla ve v\u00fdrobn\u00ed specifikaci kontrolov\u00e1na, pouze rozm\u011bry z\u00e1vitu a povrchov\u00e1 \u00faprava. \u0158e\u0161en\u00ed: v\u00fdrobce fr\u00e9zy p\u0159idal do objedn\u00e1vky specifikaci chyby stoup\u00e1n\u00ed \u2013 maxim\u00e1ln\u011b 6 \u00b5m kumulativn\u011b na ot\u00e1\u010dku, ov\u011b\u0159eno inspek\u010dn\u00edm certifik\u00e1tem. Dodavatel provedl 100% testov\u00e1n\u00ed stoup\u00e1n\u00ed na optick\u00e9m p\u0159\u00edstroji pro kontrolu stoup\u00e1n\u00ed za p\u0159\u00edplatek 1,80 USD za \u0161nek. St\u00ed\u017enosti na vlnitost povrchu se b\u011bhem n\u00e1sleduj\u00edc\u00edch 12 m\u011bs\u00edc\u016f v\u00fdroby sn\u00ed\u017eily na nulu. Ponau\u010den\u00ed: povrchov\u00e1 \u00faprava Ra a p\u0159esnost stoup\u00e1n\u00ed jsou nez\u00e1visl\u00e9 parametry \u2013 samotn\u00e9 ur\u010den\u00ed Ra nezaru\u010duje p\u0159esnost posuvu. Do specifikace n\u00e1kupu jak\u00e9hokoli \u0161nekov\u00e9ho pohonu posuvu p\u0159idejte maxim\u00e1ln\u00ed chybu stoup\u00e1n\u00ed na ot\u00e1\u010dku.<\/p>\n<\/div>\n

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T\u0159i sk\u0159\u00edn\u011b \u0161nekov\u00fdch p\u0159evod\u016f pohonu posuvu obr\u00e1b\u011bc\u00edho stroje<\/h2>\n

\"\u0160nekov\u00e9<\/p>\n

P\u0159\u00edpad 1 \u2013 Korejsk\u00fd v\u00fdrobce kolenov\u00fdch fr\u00e9zek: 3os\u00fd strojov\u00fd posuv, samosvorn\u00e9 mechanismus je kritick\u00fd pro bezpe\u010dnost<\/h3>\n

Korejsk\u00fd v\u00fdrobce vertik\u00e1ln\u00edch kolenov\u00fdch fr\u00e9zek specifikoval p\u00e1ry \u0161nekov\u00fdch p\u0159evod\u016f pro pohonn\u00e9 jednotky os X, Y a Z. Velikost stolu: 1 300 \u00d7 300 mm. Vodic\u00ed \u0161roub: stoup\u00e1n\u00ed 5 mm, z\u00e1vit Acme. Motor na osu: 0,37 kW, 1 450 ot\/min. P\u00e1r \u0161nekov\u00fdch p\u0159evod\u016f: jednochod\u00fd, modul 2, rozte\u010d st\u0159ed\u016f 40 mm, p\u0159evodov\u00fd pom\u011br 40:1. V\u00fdstupn\u00ed ot\u00e1\u010dky u vodic\u00edho \u0161roubu: 36 ot\/min, maxim\u00e1ln\u00ed posuv 180 mm\/min. Samosvor: povinn\u00fd na v\u0161ech t\u0159ech os\u00e1ch \u2013 osa Z (vertik\u00e1ln\u00ed koleno) nese hmotnost stolu, sv\u011br\u00e1ku a obrobku (celkem a\u017e 300 kg) a porucha samosvoru by zp\u016fsobila, \u017ee koleno by se vlivem gravitace shodilo. Chyba stoup\u00e1n\u00ed: pod 6 \u00b5m na ot\u00e1\u010dku (uzemn\u011bn\u00fd \u0161nek, Ra 0,4 \u00b5m). Materi\u00e1l: cementa\u010dn\u011b kalen\u00fd \u0161nek 20CrMnTi HRC 58, kolo z fosforov\u00e9ho bronzu CuSn12Ni. Maz\u00e1n\u00ed: Strojn\u00ed olej ISO VG 68, sd\u00edlen\u00fd s kolenn\u00edm suportem. Cena za p\u00e1r: 42 USD. Cena za 3osou sadu: 126 USD za fr\u00e9zku. Ro\u010dn\u00ed produkce: 1 200 fr\u00e9zek (3 600 p\u00e1r\u016f \u0161nekov\u00fdch p\u0159evod\u016f). Cena 42 USD za p\u00e1r je nejd\u016fle\u017eit\u011bj\u0161\u00edm bezpe\u010dnostn\u00edm prvkem fr\u00e9zky \u2013 samosvorn\u00e1 porucha osy Z by mohla zp\u016fsobit voln\u00fd p\u00e1d stolu o hmotnosti 300 kg do rukou obsluhy.<\/p>\n

P\u0159\u00edpad 2 \u2013 Japonsk\u00fd CNC soustruh: k\u0159\u00ed\u017eov\u00fd posuv, servopohon, kritick\u00e1 kvalita povrchu<\/h3>\n

Japonsk\u00fd v\u00fdrobce CNC soustruh\u016f specifikoval dvojici \u0161nekov\u00fdch kol pro posuv v p\u0159\u00ed\u010dn\u00fdch suportech (osa X) pro soustru\u017enick\u00e9 centrum, kter\u00e9 obr\u00e1b\u00ed sou\u010d\u00e1sti automobilov\u00fdch h\u0159\u00eddel\u00ed. Posuv v p\u0159\u00ed\u010dn\u00fdch suportech ur\u010doval toleranci kone\u010dn\u00e9ho pr\u016fm\u011bru (plus nebo m\u00ednus 10 \u00b5m) a drsnost povrchu (Ra 0,8 \u00b5m po\u017eadovan\u00e1 pro povrchy lo\u017eiskov\u00fdch \u010dep\u016f). Vodic\u00ed \u0161roub: kuli\u010dkov\u00fd \u0161roub s rozte\u010d\u00ed 6 mm (vysok\u00e1 \u00fa\u010dinnost pro CNC servo\u0159\u00edzen\u00ed). \u0160nekov\u00e1 kola: jednochod\u00e1, modul 1,5, osov\u00e1 vzd\u00e1lenost 30 mm, p\u0159evodov\u00fd pom\u011br 30:1, brou\u0161en\u00e9 Ra 0,3 \u00b5m, chyba stoup\u00e1n\u00ed pod 3 \u00b5m na ot\u00e1\u010dku. T\u0159\u00edda p\u0159esnosti DIN 5. Motor: 1 kW AC servo s enkod\u00e9rem s 131 072 \u010d\u00edsly. V\u00fdstupn\u00ed to\u010div\u00fd moment na \u0161nekov\u00e9m kole: 35 N\u00b7m (dostate\u010dn\u00e9 pro t\u0159en\u00ed v p\u0159\u00ed\u010dn\u00fdch suportech a zp\u011btnou vazbu \u0159ezn\u00e9 s\u00edly). Odchylka rychlosti posuvu od \u0161neku: pod 1 procento p\u0159i v\u0161ech rychlostech posuvu \u2013 co\u017e vede k vlnitosti povrchu pod 0,1 \u00b5m od \u0161pi\u010dky k \u00fapat\u00ed (neviditeln\u00e1 p\u0159i specifikaci Ra 0,8 \u00b5m). Cena za p\u00e1r: 125 USD. Proch\u00e1zet \u0161nekov\u00e9 p\u0159evodovky pro obr\u00e1b\u011bc\u00ed stroje<\/a> mo\u017enosti ur\u010den\u00e9 pro pohony posuvu CNC soustruh\u016f a fr\u00e9zek.<\/p>\n

P\u0159\u00edpad 3 \u2013 Vietnamsk\u00e1 radi\u00e1ln\u00ed vrta\u010dka: pinola s mechanick\u00fdm posuvem, cenov\u011b v\u00fdhodn\u00e1, p\u0159ijateln\u00e9 odvalov\u00e1n\u00ed<\/h3>\n

Vietnamsk\u00fd v\u00fdrobce obr\u00e1b\u011bc\u00edch stroj\u016f specifikoval \u0161nekov\u00fd p\u0159evod pro jednotku silov\u00e9ho posuvu na pohonu pinoly radi\u00e1ln\u00ed vrta\u010dky. Aplikace vrta\u010dky byla m\u00e9n\u011b n\u00e1ro\u010dn\u00e1 ne\u017e fr\u00e9zov\u00e1n\u00ed: vrt\u00e1n\u00ed vytv\u00e1\u0159\u00ed axi\u00e1ln\u00ed axi\u00e1ln\u00ed s\u00edlu (tla\u010d\u00edc\u00ed vrt\u00e1k do obrobku) sp\u00ed\u0161e ne\u017e bo\u010dn\u00ed s\u00edlu posuvu \u2013 tak\u017ee riziko zp\u011btn\u00e9ho pohybu bylo n\u00edzk\u00e9 (axi\u00e1ln\u00ed s\u00edla p\u016fsob\u00ed pod\u00e9l osy pinoly, kter\u00e1 je mechanicky podep\u0159ena pouzdrem pinoly bez ohledu na \u0161nekov\u00fd p\u0159evod). Pro udr\u017een\u00ed polohy pinoly byla st\u00e1le specifikov\u00e1na samosvornost (zabra\u0148uj\u00edc\u00ed gravita\u010dn\u00edmu sestupu vrtac\u00ed hlavy p\u0159i zastaven\u00ed posuvn\u00e9ho motoru). \u0160nekov\u00fd p\u0159evod: jednochod\u00fd, modul 2, osov\u00e1 vzd\u00e1lenost 35 mm, p\u0159evodov\u00fd pom\u011br 20:1. Odvalovac\u00ed \u0161nekov\u00fd p\u0159evod, Ra 1,2 \u00b5m, chyba stoup\u00e1n\u00ed p\u0159ibli\u017en\u011b 15 \u00b5m \u2013 p\u0159ijateln\u00e9 pro vrt\u00e1n\u00ed, kde nen\u00ed probl\u00e9mem vlnitost povrchu (kvalita otvoru je ur\u010dena geometri\u00ed vrt\u00e1ku, nikoli zm\u011bnou posuvu). Materi\u00e1l: kalen\u00fd \u0161nek z uhl\u00edkov\u00e9 oceli, kolo z fosforov\u00e9ho bronzu lit\u00e9 do p\u00edsku. Cena za p\u00e1r: 18 USD. P\u0159\u00edpadov\u00e1 studie ukazuje, \u017ee ne v\u0161echny aplikace posuvu pro obr\u00e1b\u011bc\u00ed stroje vy\u017eaduj\u00ed brou\u0161en\u00e9 \u0161neky \u2013 vrt\u00e1n\u00ed, vyvrt\u00e1v\u00e1n\u00ed a \u0159ez\u00e1n\u00ed z\u00e1vit\u016f jsou procesy tolerantn\u00ed k rychlosti posuvu, kde odvalovac\u00ed \u0161neky s 3 a\u017e 5kr\u00e1t ni\u017e\u0161\u00edmi n\u00e1klady poskytuj\u00ed ekvivalentn\u00ed funk\u010dn\u00ed v\u00fdsledky.<\/p>\n

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\u010casto kladen\u00e9 ot\u00e1zky<\/h2>\n
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\nOt\u00e1zka: Pro\u010d je sousledn\u00e9 fr\u00e9zov\u00e1n\u00ed bez samosvorn\u00e9ho mechanismu nebezpe\u010dn\u011bj\u0161\u00ed ne\u017e konven\u010dn\u00ed fr\u00e9zov\u00e1n\u00ed?<\/summary>\n

P\u0159i sousledn\u00e9m (dolusledn\u00e9m) fr\u00e9zov\u00e1n\u00ed se zuby fr\u00e9zy nejprve zachyt\u00ed o maxim\u00e1ln\u00ed tlou\u0161\u0165ku t\u0159\u00edsky a vystoup\u00ed z n\u00ed p\u0159i nulov\u00e9 tlou\u0161\u0165ce. Po\u010d\u00e1te\u010dn\u00ed z\u00e1b\u011br vytv\u00e1\u0159\u00ed silnou slo\u017eku s\u00edly, kter\u00e1 t\u00e1hne obrobek ve sm\u011bru posuvu \u2013 sm\u011brem k fr\u00e9ze. Pokud pohon posuvu umo\u017e\u0148uje zp\u011btn\u00fd pohyb, tato vtahovac\u00ed s\u00edla zrychl\u00ed st\u016fl, co\u017e zv\u011bt\u0161\u00ed hloubku z\u00e1b\u011bru, co\u017e zv\u011bt\u0161\u00ed vtahovac\u00ed s\u00edlu \u2013 pozitivn\u00ed zp\u011btnovazebn\u00ed smy\u010dka, kter\u00e1 kon\u010d\u00ed prudk\u00fdm n\u00e1razem b\u011bhem milisekund. P\u0159i konven\u010dn\u00edm (vzestupn\u00e9m) fr\u00e9zov\u00e1n\u00ed se zuby zachyt\u00ed o nulov\u00e9 tlou\u0161\u0165ce a vystoup\u00ed z n\u00ed p\u0159i maxim\u00e1ln\u00ed tlou\u0161\u0165ce \u2013 s\u00edla tla\u010d\u00ed obrobek od fr\u00e9zy, co\u017e je sp\u00ed\u0161e samokorek\u010dn\u00ed ne\u017e samozesiluj\u00edc\u00ed. Samosvorn\u00e9 \u0161nekov\u00e9 p\u0159evody zaji\u0161\u0165uj\u00ed bezpe\u010dn\u00e9 sousledn\u00e9 fr\u00e9zov\u00e1n\u00ed na ru\u010dn\u00edch fr\u00e9zk\u00e1ch \u2013 bez nich je sousledn\u00e9 fr\u00e9zov\u00e1n\u00ed na stroj\u00edch s neblokovac\u00edmi pohony posuvu zak\u00e1z\u00e1no.<\/p>\n<\/details>\n

\nOt\u00e1zka: Mohou CNC stroje pou\u017e\u00edvat pro posuv kuli\u010dkov\u00e9 \u0161rouby m\u00edsto \u0161nekov\u00fdch p\u0159evod\u016f?<\/summary>\n

Modern\u00ed CNC stroje univerz\u00e1ln\u011b pou\u017e\u00edvaj\u00ed pro osy posuvu kuli\u010dkov\u00e9 \u0161rouby, proto\u017ee kuli\u010dkov\u00e9 \u0161rouby poskytuj\u00ed vy\u0161\u0161\u00ed \u00fa\u010dinnost (v\u00edce ne\u017e 90 procent oproti 40 a\u017e 50 procent\u016fm u \u0161nekov\u00fdch p\u0159evod\u016f), ni\u017e\u0161\u00ed t\u0159en\u00ed a nulovou v\u016fli s p\u0159edpjat\u00fdmi maticemi. Kuli\u010dkov\u00e9 \u0161rouby nejsou samosvorn\u00e9 \u2013 funkci udr\u017eov\u00e1n\u00ed polohy elektronicky zaji\u0161\u0165uj\u00ed CNC servomotor a regul\u00e1tor. \u0160nekov\u00fd p\u0159evod se v CNC aplikac\u00edch posuvu obvykle pou\u017e\u00edv\u00e1 jako stupe\u0148 sn\u00ed\u017een\u00ed ot\u00e1\u010dek mezi servomotorem a kuli\u010dkov\u00fdm \u0161roubem, kdy\u017e rozsah ot\u00e1\u010dek motoru p\u0159ekro\u010d\u00ed kritick\u00e9 ot\u00e1\u010dky kuli\u010dkov\u00e9ho \u0161roubu \u2013 nikoli jako prim\u00e1rn\u00ed mechanismus posuvu. Ru\u010dn\u00ed stroje (kolenn\u00ed fr\u00e9zky, soustruhy s motorem) si zachov\u00e1vaj\u00ed pohony posuvu \u0161nekov\u00fdm p\u0159evodem, proto\u017ee jim chyb\u00ed servomotory a regul\u00e1tory, kter\u00e9 by zaji\u0161\u0165ovaly elektronick\u00e9 udr\u017eov\u00e1n\u00ed polohy \u2013 samosvorn\u00fd \u0161nekov\u00fd p\u0159evod je bezpe\u010dnostn\u00ed mechanismus, kter\u00fd nahrazuje elektronick\u00e9 servo\u0159\u00edzen\u00ed.<\/p>\n<\/details>\n

\nOt\u00e1zka: Jak ov\u011b\u0159\u00edm p\u0159esnost stoup\u00e1n\u00ed \u0161nekov\u00e9ho pohonu posuvu?<\/summary>\n

P\u0159esnost stoup\u00e1n\u00ed se m\u011b\u0159\u00ed na specializovan\u00e9m p\u0159\u00edstroji pro m\u011b\u0159en\u00ed z\u00e1vit\u016f (nap\u0159\u00edklad kontrolor stoup\u00e1n\u00ed Mahr nebo Klingelnberg), kter\u00fd sleduje spir\u00e1lovou dr\u00e1hu z\u00e1vitu \u0161neku a porovn\u00e1v\u00e1 ji s teoretickou spir\u00e1lou. V\u00fdstupem je graf odchylek stoup\u00e1n\u00ed zobrazuj\u00edc\u00ed kumulativn\u00ed chybu v \u00b5m na ot\u00e1\u010dku. Maxim\u00e1ln\u00ed kumulativn\u00ed chyba za jednu ot\u00e1\u010dku je specifika\u010dn\u00edm parametrem pro \u0161neky s posuvn\u00fdm pohonem. Toto m\u011b\u0159en\u00ed nelze prov\u00e9st standardn\u00edmi metrologick\u00fdmi n\u00e1stroji (mikrometry, sou\u0159adnicov\u00e9 m\u011b\u0159ic\u00ed stroje nesleduj\u00ed spir\u00e1lovou dr\u00e1hu). Pokud v\u00e1\u0161 dodavatel \u0161nek\u016f nem\u00e1 p\u0159\u00edstroj pro kontrolu stoup\u00e1n\u00ed, po\u017e\u00e1dejte o zasl\u00e1n\u00ed \u0161nek\u016f do metrologick\u00e9 laborato\u0159e t\u0159et\u00ed strany k ov\u011b\u0159en\u00ed stoup\u00e1n\u00ed \u2013 n\u00e1klady na zkou\u0161ku (5 a\u017e 15 USD za \u0161nek) jsou zanedbateln\u00e9 ve srovn\u00e1n\u00ed s v\u00fdrobn\u00ed hodnotou obr\u00e1b\u011bc\u00edch stroj\u016f, kter\u00e9 z\u00e1vis\u00ed na p\u0159esnosti posuvu.<\/p>\n<\/details>\n

\nOt\u00e1zka: Jak\u00e1 je typick\u00e1 \u017eivotnost dvojice \u0161nekov\u00fdch ozuben\u00fdch kol pro posuv obr\u00e1b\u011bc\u00edho stroje?<\/summary>\n

\u0160nekov\u00e9 ozuben\u00e9 kolo pro ru\u010dn\u00ed posuv obr\u00e1b\u011bc\u00edch stroj\u016f b\u011b\u017e\u00ed p\u0159eru\u0161ovan\u011b \u2013 obvykle 500 a\u017e 1 500 hodin ro\u010dn\u011b p\u0159i skute\u010dn\u00e9m posuvu (stroj prov\u00e1d\u00ed \u0159ezn\u00e9 cykly, nikoli kontinu\u00e1ln\u00ed posuv). P\u0159i tomto zat\u00ed\u017een\u00ed vydr\u017e\u00ed bronzov\u00e9 kolo 8 a\u017e 15 let. Kalen\u00fd ocelov\u00fd \u0161nek vydr\u017e\u00ed po celou dobu \u017eivotnosti stroje (20 a\u017e 30 let). Omezuj\u00edc\u00edm faktorem \u017eivotnosti je obvykle n\u00e1r\u016fst v\u016fle, kter\u00e1 sni\u017euje kvalitu povrchov\u00e9 \u00fapravy \u2013 v\u00fdm\u011bnu kola je t\u0159eba napl\u00e1novat, kdy\u017e v\u016fle p\u0159es\u00e1hne 3 a\u017e 5 \u00fahlov\u00fdch minut (m\u011b\u0159iteln\u00e1 jako v\u016fle ve sm\u011bru posuvu u stolu). \u0160nekov\u00e9 ozuben\u00e9 kolo pro CNC posuv ve v\u00fdrobn\u00edm prost\u0159ed\u00ed b\u011b\u017e\u00ed 2 000 a\u017e 4 000 hodin ro\u010dn\u011b a m\u016f\u017ee vy\u017eadovat v\u00fdm\u011bnu kola ka\u017ed\u00fdch 5 a\u017e 8 let.<\/p>\n<\/details>\n

\nOt\u00e1zka: Pou\u017e\u00edv\u00e1 se n\u011bkdy v pohonech posuvu obr\u00e1b\u011bc\u00edch stroj\u016f dvouchod\u00fd \u0161nek?<\/summary>\n

Ne \u2013 a to je absolutn\u00ed pravidlo pro aplikace posuvu obr\u00e1b\u011bc\u00edch stroj\u016f. Dvouchod\u00fd \u0161nek ztr\u00e1c\u00ed samosvornost, co\u017e znamen\u00e1, \u017ee \u0159ezn\u00e1 s\u00edla m\u016f\u017ee posuv tla\u010dit zp\u011bt. Nejde o kompromis ve v\u00fdkonu \u2013 jde o bezpe\u010dnostn\u00ed riziko. V\u00fdhoda \u00fa\u010dinnosti dvouchod\u00e9ho syst\u00e9mu (vy\u0161\u0161\u00ed \u00fa\u010dinnost posuvov\u00e9ho motoru, ni\u017e\u0161\u00ed generov\u00e1n\u00ed tepla) nekompenzuje ztr\u00e1tu bezpe\u010dnostn\u00ed funkce. Ka\u017ed\u00fd p\u00e1r \u0161nekov\u00fdch ozuben\u00fdch kol posuvu obr\u00e1b\u011bc\u00edho stroje mus\u00ed b\u00fdt jednochod\u00fd, s jedn\u00edm obalem a s \u00fahlem stoup\u00e1n\u00ed pod \u00fahlem t\u0159en\u00ed. V \u017e\u00e1dn\u00e9 norm\u011b pro bezpe\u010dnost obr\u00e1b\u011bc\u00edch stroj\u016f na cel\u00e9m sv\u011bt\u011b neexistuj\u00ed \u017e\u00e1dn\u00e9 v\u00fdjimky.<\/p>\n<\/details>\n<\/div>\n

<\/p>\n

Pohony posuvu fr\u00e9zek a soustruh\u016f pou\u017e\u00edvaj\u00ed \u0161nekov\u00e9 p\u0159evody jako sou\u010dasn\u00e9 reduktory rychlosti a bezpe\u010dnostn\u00ed za\u0159\u00edzen\u00ed \u2013 samosvorn\u00e1 vlastnost zabra\u0148uje zp\u011btn\u00e9mu pohybu posuvn\u00e9ho mechanismu \u0159ezn\u00fdmi silami a zp\u016fsobov\u00e1n\u00ed hav\u00e1ri\u00ed p\u0159i zatahov\u00e1n\u00ed n\u00e1stroje, kter\u00e9 po\u0161kozuj\u00ed stroje a ohro\u017euj\u00ed obsluhu. Anal\u00fdza zp\u011btn\u00e9 vazby \u0159ezn\u00e9 s\u00edly sleduje, jak se tangenci\u00e1ln\u00ed \u0159ezn\u00e1 s\u00edla p\u0159em\u011b\u0148uje na zp\u011btn\u00fd to\u010div\u00fd moment u \u0161nekov\u00e9ho p\u0159evodu, co\u017e ukazuje, \u017ee rezerva samosvornosti je navr\u017eena sp\u00ed\u0161e jako ohromuj\u00edc\u00ed ne\u017e margin\u00e1ln\u00ed. P\u0159esnost posuvu z\u00e1vis\u00ed na chyb\u011b stoup\u00e1n\u00ed \u0161neku \u2013 specifika\u010dn\u00edm parametru nez\u00e1visl\u00e9m na jakosti povrchu Ra, kter\u00fd mus\u00ed b\u00fdt ov\u011b\u0159en specializovan\u00fdm m\u011b\u0159en\u00edm stoup\u00e1n\u00ed. Brou\u0161en\u00e9 \u0161neky s chybou stoup\u00e1n\u00ed pod 5 \u00b5m vytv\u00e1\u0159ej\u00ed jakost povrchu vhodnou pro p\u0159esn\u00e9 obr\u00e1b\u011bn\u00ed; odvalovan\u00e9 \u0161neky s chybou stoup\u00e1n\u00ed 15+ \u00b5m jsou vhodn\u00e9 pouze pro vrt\u00e1n\u00ed a hrubov\u00e1n\u00ed, kde kol\u00eds\u00e1n\u00ed posuvu neovliv\u0148uje kvalitu d\u00edlu.<\/p>\n

Pro v\u00fdrobce obr\u00e1b\u011bc\u00edch stroj\u016f poskytuje na\u0161e technick\u00e9 odd\u011blen\u00ed p\u00e1ry \u0161nekov\u00fdch ozuben\u00fdch kol pro posuvn\u00e9 pohony s ov\u011b\u0159en\u00fdmi certifik\u00e1ty p\u0159esnosti stoup\u00e1n\u00ed. Standardn\u00ed katalog p\u0159esn\u00e9 \u0161nekov\u00e9 p\u0159evodovky<\/a> Zahr\u0148te konfigurace pohon\u016f posuvu s odvalovac\u00edmi a brou\u0161en\u00fdmi obr\u00e1b\u011bn\u00fdmi fr\u00e9zami od osov\u00e9 vzd\u00e1lenosti 30 do 80 mm s dokumentac\u00ed o chyb\u00e1ch stoup\u00e1n\u00ed. Ode\u0161lete specifikace posuvu obr\u00e1b\u011bc\u00edho stroje<\/a> s typem osy, stoup\u00e1n\u00edm vodic\u00edho \u0161roubu, maxim\u00e1ln\u00ed \u0159eznou silou a po\u017eadavkem na jakost povrchu.<\/p>\n

<\/p>\n

\n

Specifikace p\u00e1r\u016f \u0161nekov\u00fdch p\u0159evod\u016f pro pohony posuvu obr\u00e1b\u011bc\u00edch stroj\u016f?<\/h3>\n

Za\u0161lete typ stroje, osu, stoup\u00e1n\u00ed vodic\u00edho \u0161roubu, maxim\u00e1ln\u00ed \u0159eznou s\u00edlu, c\u00edlovou kvalitu povrchu a zda se jedn\u00e1 o ru\u010dn\u00ed (samosvorn\u00e9) nebo CNC (servo\u0159\u00edzen\u00ed). Vypo\u010d\u00edt\u00e1me kroutic\u00ed moment pro zp\u011btn\u00fd pohon a doporu\u010d\u00edme spr\u00e1vnou specifikaci \u0161neku s ov\u011b\u0159en\u00edm p\u0159esnosti stoup\u00e1n\u00ed.<\/p>\n

Vy\u017e\u00e1dejte si specifikaci pohonu posuvu \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 Milling Machine and Lathe Feed Drives A milling cutter engages a steel workpiece at 2,000 N of tangential cutting force. The feed-direction component of that force \u2014 400 to 800 N depending on the cutter geometry \u2014 pushes backward through the lead screw, through […]<\/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-1424","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\/1424","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=1424"}],"version-history":[{"count":1,"href":"https:\/\/worm-and-worm-wheel.com\/cs\/wp-json\/wp\/v2\/posts\/1424\/revisions"}],"predecessor-version":[{"id":1426,"href":"https:\/\/worm-and-worm-wheel.com\/cs\/wp-json\/wp\/v2\/posts\/1424\/revisions\/1426"}],"wp:attachment":[{"href":"https:\/\/worm-and-worm-wheel.com\/cs\/wp-json\/wp\/v2\/media?parent=1424"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/worm-and-worm-wheel.com\/cs\/wp-json\/wp\/v2\/categories?post=1424"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/worm-and-worm-wheel.com\/cs\/wp-json\/wp\/v2\/tags?post=1424"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}