{"id":742,"date":"2026-06-03T01:48:54","date_gmt":"2026-06-03T01:48:54","guid":{"rendered":"https:\/\/planetary-gearboxes.com\/?p=742"},"modified":"2026-06-03T01:48:54","modified_gmt":"2026-06-03T01:48:54","slug":"planetary-gearbox-cnc-machine-tool-rotary-axis-selection","status":"publish","type":"post","link":"https:\/\/planetary-gearboxes.com\/cs\/planetary-gearbox-cnc-machine-tool-rotary-axis-selection\/","title":{"rendered":"Precision Planetary Gearbox Selection for CNC Machine Tool Rotary Axes"},"content":{"rendered":"
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Korea Ever-Power<\/span>
\nPr\u016fvodce aplikac\u00ed CNC obr\u00e1b\u011bc\u00edch stroj\u016f<\/span><\/div>\n

V\u00fdb\u011br p\u0159esn\u00e9 planetov\u00e9 p\u0159evodovky pro rota\u010dn\u00ed osy CNC obr\u00e1b\u011bc\u00edch stroj\u016f \u2013 osy B\/C\/A a veden\u00ed 4.\/5. osy<\/h1>\n

CNC rota\u010dn\u00ed osy kladou po\u017eadavky, kter\u00e9 obecn\u00e9 servo vod\u00edtka ne\u0159e\u0161\u00ed. P\u0159esnost vyvrt\u00e1vac\u00ed operace z\u00e1vis\u00ed p\u0159\u00edmo na v\u016fli p\u0159evodovky v m\u00edst\u011b \u0159ezn\u00e9ho polom\u011bru \u2013 nikoli v libovoln\u00e9m testovac\u00edm bod\u011b. P\u011btios\u00e1 osa B p\u0159i siln\u00e9m p\u0159eru\u0161ovan\u00e9m \u0159ezu vy\u017eaduje torzn\u00ed tuhost, kterou obecn\u00e1 servo aplikace nikdy nevy\u017eaduje. Zahlcov\u00e1n\u00ed chladic\u00ed kapalinou vy\u017eaduje stupe\u0148 kryt\u00ed IP65. Tato p\u0159\u00edru\u010dka \u0159e\u0161\u00ed v\u0161echna t\u0159i omezen\u00ed osu po ose.<\/p>\n

Z\u00edskejte podporu pro specifikace CNC os \u2192<\/a><\/p>\n<\/div>\n<\/div>\n<\/section>\n

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T\u0159i po\u017eadavky, kter\u00e9 odli\u0161uj\u00ed rota\u010dn\u00ed osy CNC od b\u011b\u017en\u00fdch servopohon\u016f<\/h2>\n

V\u011bt\u0161ina metodik v\u00fdb\u011bru p\u0159esn\u00fdch planetov\u00fdch p\u0159evodovek je naps\u00e1na pro obecnou servo automatizaci \u2013 dopravn\u00edky, roboty, d\u011bli\u010dky. Rota\u010dn\u00ed osy CNC obr\u00e1b\u011bc\u00edch stroj\u016f zav\u00e1d\u011bj\u00ed t\u0159i dal\u0161\u00ed po\u017eadavky, kter\u00e9 tyto p\u0159\u00edru\u010dky nezahrnuj\u00ed, a nezohledn\u011bn\u00ed kter\u00e9hokoli z nich vede ke specifikaci p\u0159evodovky, kter\u00e1 je technicky spr\u00e1vn\u00e1 pro to\u010div\u00fd moment a rychlost, ale pro danou aplikaci je nespr\u00e1vn\u00e1.<\/p>\n

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\u2460 V\u016fle v m\u00edst\u011b \u0159ezn\u00e9ho polom\u011bru \u2013 nikoli v obecn\u00e9m kontroln\u00edm bod\u011b<\/div>\n

Specifikace p\u0159esnosti CNC uv\u00e1d\u011bj\u00ed tolerance na obrobku \u2013 na skute\u010dn\u00e9m polom\u011bru \u0159ezu, kter\u00fd m\u016f\u017ee b\u00fdt 10 mm (mal\u00fd otvor) nebo 300 mm (velk\u00fd \u010deln\u00ed obrobek). Stejn\u00e1 v\u016fle 8 \u00fahlov\u00fdch minut vytv\u00e1\u0159\u00ed te\u010dnou chybu 23 \u03bcm p\u0159i R=10 mm, ale 1 163 \u03bcm p\u0159i R=500 mm. Specifikace CNC mus\u00ed b\u00fdt v\u017edy vyhodnoceny p\u0159i skute\u010dn\u00e9m polom\u011bru \u0159ezu, nikoli p\u0159i reprezentativn\u00ed mezihodnot\u011b. V\u016fle, kter\u00e1 je p\u0159ijateln\u00e1 pro jednu operaci, m\u016f\u017ee pro jinou na stejn\u00e9m stroji zcela selhat.<\/p>\n<\/div>\n

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\u2461 Torzn\u00ed tuhost p\u0159i \u0159ezn\u00e9m zat\u00ed\u017een\u00ed \u2013 nejen p\u0159esnost polohov\u00e1n\u00ed<\/div>\n

CNC \u0159ezn\u00e9 zat\u00ed\u017een\u00ed je vysoce prom\u011bnliv\u00e9 \u2013 kroutic\u00ed moment se m\u011bn\u00ed okam\u017eit\u011b s tlou\u0161\u0165kou t\u0159\u00edsky, zm\u011bnami materi\u00e1lu a vstupem\/v\u00fdstupem n\u00e1stroje. P\u0159i \u0161pi\u010dkov\u00e9m \u0159ezn\u00e9m kroutic\u00edm momentu 380 N\u00b7m se EP-ZDE-160 (Ct=38 N\u00b7m\/\u00fahlovou minutu) elasticky vych\u00fdl\u00ed o 10 \u00fahlov\u00fdch minut \u2013 v\u00edce ne\u017e specifikovan\u00e1 v\u016fle \u2013 co\u017e zp\u016fsob\u00ed chybu polohy n\u00e1stroje, kterou zp\u011btn\u00e1 vazba serva nem\u016f\u017ee detekovat ani opravit, proto\u017ee kod\u00e9r motoru je na vstupn\u00ed stran\u011b p\u0159evodovky. Tato chyba z\u00e1visl\u00e1 na zat\u00ed\u017een\u00ed je pro servo neviditeln\u00e1, p\u0159\u00edmo se hromad\u00ed v obrobku a zhor\u0161uje se s amplitudou \u0159ezn\u00e9 s\u00edly.<\/p>\n<\/div>\n

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\u2462 Chladic\u00ed prost\u0159ed\u00ed \u2013 Kryt\u00ed IP ur\u010duje \u017eivotnost<\/div>\n

CNC obr\u00e1b\u011bc\u00ed stroje pou\u017e\u00edvaj\u00ed zahlcuj\u00edc\u00ed chladivo o tlaku 2\u20138 bar\u016f, mlhu \u0159ezn\u00e9ho oleje a pravideln\u00e9 vnit\u0159n\u00ed oplachov\u00e1n\u00ed stroje. P\u0159evodovka instalovan\u00e1 na extern\u00edm oto\u010dn\u00e9m stole um\u00edst\u011bn\u00e9m pod v\u0159etenem m\u016f\u017ee p\u0159ij\u00edmat p\u0159\u00edm\u00fd dopad chladic\u00ed kapaliny p\u0159i pln\u00e9m tlaku \u010derpadla. Kryt\u00ed IP54 (standard pro EP-ZDE\/ZDF\/ZDWE\/ZDWF) chr\u00e1n\u00ed p\u0159ed sm\u011brov\u00fdm st\u0159\u00edkaj\u00edc\u00edm paprskem, ale nikoli p\u0159ed trval\u00fdmi p\u0159\u00edm\u00fdmi trysky. Pouze kryt\u00ed IP65 (EP-ZDS) odol\u00e1v\u00e1 testu IPX5 \u2013 tryska o pr\u016fm\u011bru 6,3 mm p\u0159i pr\u016ftoku 12,5 l\/min z jak\u00e9hokoli sm\u011bru \u2013 co\u017e se bl\u00ed\u017e\u00ed podm\u00ednk\u00e1m zahlcuj\u00edc\u00edho chladiva na exponovan\u00fdch rota\u010dn\u00edch up\u00edna\u010d\u00edch.<\/p>\n<\/div>\n<\/div>\n<\/section>\n

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\"P\u0159esn\u00e1<\/p>\n

P\u0159esn\u00e9 planetov\u00e9 p\u0159evodovky \u0159ady EP jsou p\u0159ed odesl\u00e1n\u00edm testov\u00e1ny na v\u016fli dle normy 100% p\u0159i jmenovit\u00e9m momentu \u00b13%. Ka\u017ed\u00e1 jednotka m\u00e1 ve sv\u00e9 v\u00fdrobn\u00ed dokumentaci certifikovanou hodnotu v\u016fle \u2013 co\u017e je sledovatelnost vy\u017eadovan\u00e1 syst\u00e9my \u0159\u00edzen\u00ed kvality OEM CNC obr\u00e1b\u011bc\u00edch stroj\u016f. Zobrazit specifikace \u0159ady EP \u2192<\/a><\/div>\n<\/div>\n

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V\u016fle na va\u0161em polom\u011bru \u0159ezu \u2013 st\u016fl, kter\u00fd pot\u0159ebuj\u00ed in\u017een\u00fd\u0159i CNC obr\u00e1b\u011bc\u00edch stroj\u016f<\/h2>\n

N\u00e1sleduj\u00edc\u00ed tabulka p\u0159ev\u00e1d\u00ed specifikace v\u016fle standardn\u00edch planetov\u00fdch p\u0159evodovek na tangenci\u00e1ln\u00ed chybu polohov\u00e1n\u00ed p\u0159i reprezentativn\u00edch CNC \u0159ezn\u00fdch polom\u011brech. V\u0161echny hodnoty pou\u017e\u00edvaj\u00ed p\u0159esn\u00fd vzorec: E_tangenci\u00e1ln\u00ed = R \u00d7 tan(BL \/ (60 \u00d7 180\/\u03c0)). U vyvrt\u00e1vac\u00edch a soustru\u017enick\u00fdch operac\u00ed, kde n\u00e1stroj sleduje kruhovou dr\u00e1hu, se tato tangenci\u00e1ln\u00ed chyba projev\u00ed p\u0159\u00edmo jako odchylka kruhovitosti na obroben\u00e9 plo\u0161e.<\/p>\n

\n\n\n\n\n\n\n\n\n
V\u016fle<\/th>\nR=10 mm
\nMal\u00fd otvor<\/span><\/th>\n		R=25 mm
\nVrt\u00e1n\u00ed \u03a650 mm<\/span><\/th>\n		R=50 mm
\nVrt\u00e1n\u00ed \u03a6100 mm<\/span><\/th>\n		R=100 mm
\n\u03a6200mm \u010deln\u00ed strana<\/span><\/th>\n		R=200 mm
\nSt\u016fl \u03a6400mm<\/span><\/th>\n		S\u00e9rie EP<\/th>\n<\/tr>\n<\/thead>\n
<3 \u00fahlov\u00fdch minut<\/td>\n8,7 \u03bcm<\/td>\n21,8 \u03bcm<\/td>\n43,6 \u03bcm<\/td>\n87,3 \u03bcm<\/td>\n174,5 \u03bcm<\/td>\nZak\u00e1zkov\u00e1 \/ speci\u00e1ln\u00ed objedn\u00e1vka<\/td>\n<\/tr>\n
<8 \u00fahlov\u00fdch minut \u2605<\/td>\n23,3 \u03bcm<\/td>\n58,2 \u03bcm<\/td>\n116,4 \u03bcm<\/td>\n232,7 \u03bcm<\/td>\n465,4 \u03bcm<\/td>\nEP-ZDE\/ZDF (60\u2013160 mm) \u00b7 EP-ZDS (v\u0161e)<\/td>\n<\/tr>\n
<12 \u00fahlov\u00fdch minut<\/td>\n34,9 \u03bcm<\/td>\n87,3 \u03bcm<\/td>\n174,5 \u03bcm<\/td>\n349,1 \u03bcm<\/td>\n698,1 \u03bcm<\/td>\nEP-ZDE-40 jednostup\u0148ov\u00e1; 2-stup\u0148ov\u00e9 jednotky<\/td>\n<\/tr>\n
<25 \u00fahlov\u00fdch minut<\/td>\n72,7 \u03bcm<\/td>\n181,8 \u03bcm<\/td>\n363,6 \u03bcm<\/td>\n727,3 \u03bcm<\/td>\n1 454 \u03bcm<\/td>\nEP-ZDWE\/ZDWF \u2013 pouze pravo\u00fahl\u00fd vstup<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

\u2605 Standardn\u00ed \u0159ada EP-ZDE\/ZDF\/ZDS. Hodnoty p\u0159edstavuj\u00ed maxim\u00e1ln\u00ed chybu v\u016fle p\u0159ed kompenzac\u00ed v\u016fle CNC. S aktivn\u00ed kompenzac\u00ed v\u016fle Fanuc\/Siemens je zbytkov\u00e1 chyba p\u0159i n\u00edzk\u00fdch rychlostech posuvu obvykle <10% nekompenzovan\u00e9 hodnoty. Hodnoty tu\u010dn\u011b vyzna\u010den\u00e9 \u010derven\u011b p\u0159ekra\u010duj\u00ed toleranci IT7 pro dan\u00fd pr\u016fm\u011br d\u00edry \u2013 aplikace vy\u017eaduje bu\u010f men\u0161\u00ed v\u016fli, kompenzaci, nebo v\u011bt\u0161\u00ed specifikaci tolerance d\u00edry.<\/p>\n

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\u010cten\u00ed t\u00e9to tabulky pro konkr\u00e9tn\u00ed operaci<\/div>\n

Vyvrt\u00e1v\u00e1n\u00ed otvoru o pr\u016fm\u011bru \u03a6100 mm (R=50 mm) na 4. ose s vertik\u00e1ln\u00edm obr\u00e1b\u011bc\u00edm strojem (VMC) pomoc\u00ed n\u00e1stroje EP-ZDE-120 (<8 \u00fahlov\u00fdch minut) vytv\u00e1\u0159\u00ed maxim\u00e1ln\u00ed chybu kruhovitosti vyvolanou v\u016fl\u00ed 116,4 \u03bcm na ot\u00e1\u010dku. S kompenzac\u00ed v\u016fle u Fanuc \u0159ady 0i se tato chyba sni\u017euje na p\u0159ibli\u017en\u011b 12\u201320 \u03bcm \u2013 co\u017e je kompatibiln\u00ed s toleranc\u00ed IT8. Bez kompenzace se stejn\u00fd otvor s pr\u016fm\u011brem IT7 (25 \u03bcm pro otvor \u03a6100 mm) nevyrovn\u00e1. Zadejte kompenzaci v\u016fle v CNC programu nebo upgradujte na EP-ZDS, abyste sn\u00ed\u017eili pod\u00edl v\u016fle na rozpo\u010dtu chyb.<\/p>\n<\/div>\n<\/section>\n

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Specifikace rota\u010dn\u00edch os CNC \u2013 osy B\/C\/A a 4.\/5. osa, osa po ose<\/h2>\n

P\u011bt typ\u016f rota\u010dn\u00edch os pou\u017e\u00edvan\u00fdch v korejsk\u00fdch CNC obr\u00e1b\u011bc\u00edch stroj\u00edch m\u00e1 odli\u0161n\u00e9 prim\u00e1rn\u00ed konstruk\u010dn\u00ed ovlada\u010de. Stejn\u00e1 jednotka \u0159ady EP, kter\u00e1 je spr\u00e1vn\u00e1 pro \u010dep 4. osy na vertik\u00e1ln\u00edm obr\u00e1b\u011bc\u00edm centru (VMC), nebude vhodn\u00e1 pro osu B na 5os\u00e9m obr\u00e1b\u011bc\u00edm centru a nebude vhodn\u00e1 pro osu C na soustru\u017enicko-fr\u00e9zovac\u00edm centru, kter\u00e9 je vystaveno pln\u00fdm to\u010div\u00fdm moment\u016fm. N\u00ed\u017ee uveden\u00e1 anal\u00fdza os po os\u00e1ch ur\u010duje spr\u00e1vnou specifikaci pro ka\u017edou z nich.<\/p>\n

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OSA B<\/div>\n
5os\u00e9 obr\u00e1b\u011bc\u00ed centrum \u2013 nakl\u00e1p\u011bc\u00ed oto\u010dn\u00fd st\u016fl nebo hlava<\/div>\n<\/div>\n
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Prim\u00e1rn\u00ed po\u017eadavky:<\/strong>
\nRozsah n\u00e1klonu \u00b190\u00b0 nebo \u00b1110\u00b0
\nMaxim\u00e1ln\u00ed \u0159ezn\u00fd moment: 150\u2013600 N\u00b7m v z\u00e1vislosti na velikosti
\nT\u011b\u017ek\u00e9 p\u0159eru\u0161ovan\u00e9 \u0159ezy v titanu\/Inconelu
\nUp\u00ednac\u00ed moment: 2\u20133\u00d7 \u0159ezn\u00fd moment
\nMinim\u00e1ln\u00ed kryt\u00ed IP54 (chladic\u00ed mlha); kryt\u00ed IP65 pro extern\u00ed sv\u00edtidlo<\/div>\n
Kritick\u00e1 specifikace:<\/strong>
\nTorzn\u00ed tuhost dominuje nad to\u010div\u00fdm momentem zk\u0159\u00ed\u017een\u00e9ho kola
\nV\u00fdhybka ZDS-142: 352 N\u00b7m (BL \u00d7 Ct = 8 \u00d7 44)
\nCrossover ZDE-160: 304 N\u00b7m (8 \u00d7 38)
\nPro T_cut > 304 N\u00b7m: elastick\u00e1 chyba p\u0159ekra\u010duje v\u016fli
\n\u2192 p\u0159\u00edsn\u011bj\u0161\u00ed specifikace v\u016fle nepom\u016f\u017ee; vy\u0161\u0161\u00ed Ct ano<\/div>\n
Doporu\u010deno:<\/strong>
\nSt\u0159edn\u00ed 5os\u00fd (T_cut \u2264 250 N\u00b7m):
\n\u2192 EP-ZDS-115<\/a>, 20:1, Ct=20 N\u00b7m\/\u00fahlovou minutu
\nT\u011b\u017ek\u00fd 5os\u00fd (T_cut 250\u2013600 N\u00b7m):
\n\u2192 EP-ZDS-142, 20:1, Ct=44 N\u00b7m\/\u00fahlovou minutu
\nVelmi t\u011b\u017ek\u00e9 (T_cut > 600 N\u00b7m):
\n\u2192 EP-ZDS-190, 20\u201325:1, Ct=130 N\u00b7m\/obloukov\u00e1 minuta<\/div>\n<\/div>\n
Kontrola setrva\u010dnosti:<\/strong> Osa B nakl\u00e1p\u00ed cel\u00fd oto\u010dn\u00fd st\u016fl nebo v\u0159etenovou hlavu. Pro nakl\u00e1p\u011bc\u00ed st\u016fl o hmotnosti 50 kg p\u0159i R=200 mm: J_load = 50\u00d70,20\u00b2 = 2,0 kg\u00b7m\u00b2. i_optimal = \u221a(2,0\/0,006) = 18,3 \u2013 co\u017e potvrzuje, \u017ee pom\u011br 20:1 je spr\u00e1vn\u00fd. P\u0159i 20:1 je J_reflected = 2,0\/400 = 0,005 kg\u00b7m\u00b2 \u2013 pom\u011br setrva\u010dnosti 0,83:1 (m\u00edrn\u011b nedostate\u010dn\u011b odra\u017een\u00fd), co\u017e je p\u0159ijateln\u00e9 a umo\u017e\u0148uje pln\u00e9 servo Kv.<\/div>\n<\/div>\n

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OSA C<\/div>\n
Soustru\u017enicko-fr\u00e9zovac\u00ed centrum \u2014 Polohov\u00e1n\u00ed hlavn\u00edho v\u0159etena a fr\u00e9zovacko-soustru\u017enick\u00e1 osa C<\/div>\n<\/div>\n
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Dva odli\u0161n\u00e9 provozn\u00ed re\u017eimy:<\/strong>
\nRe\u017eim soustru\u017een\u00ed: Osa C je pohonem v\u0159etena \u2013 vysok\u00fd to\u010div\u00fd moment, plynul\u00e1 rotace, nen\u00ed vy\u017eadov\u00e1na p\u0159esnost polohy
\nRe\u017eim fr\u00e9zov\u00e1n\u00ed\/polohov\u00e1n\u00ed: Osa C indexuje p\u0159esn\u00fd \u00fahel pro fr\u00e9zov\u00e1n\u00ed mimo st\u0159ed \u2013 p\u0159esnost polohy je kritick\u00e1<\/div>\n
Po\u017eadavky na re\u017eim p\u0159esnosti:<\/strong>
\nP\u0159esnost indexu: \u00b15\u201315\u2033 obloukov\u00fdch sekund
\n8 \u00fahlov\u00fdch minut = 480 \u00fahlov\u00fdch sekund \u2013 p\u0159\u00edli\u0161 \u0161irok\u00fd \u00fahel pro c\u00edl \u00b15\u2033
\nP\u0159esnost osy C: vy\u017eaduje uzav\u0159enou smy\u010dku ozuben\u00e9ho kola + enkod\u00e9ru
\nP\u0159evodovka nastavuje spodn\u00ed mez p\u0159esnosti, kterou mus\u00ed enkod\u00e9r p\u0159ekonat korekc\u00ed v uzav\u0159en\u00e9 smy\u010dce.<\/div>\n
Doporu\u010deno:<\/strong>
\nPolohov\u00e1n\u00ed v ose C (fr\u00e9zov\u00e1n\u00ed-soustru\u017een\u00ed):
\n\u2192 EP-ZDE-160 nebo EP-ZDS-115 v 10\u201316:1
\nBL <8 \u00fahlov\u00fdch minut; v kombinaci s enkod\u00e9rem Heidenhain\/Renishaw pro p\u0159esnost \u00b115\u2033
\nExpozice chladic\u00ed kapaliny zaplaven\u00edm: specifikujte EP-ZDS-115\/142<\/div>\n<\/div>\n
Kritick\u00e1 pozn\u00e1mka k p\u0159esnosti osy C:<\/strong> V\u016fle <8 \u00fahlov\u00fdch minut u EP-ZDE\/ZDS odpov\u00edd\u00e1 480 \u00fahlov\u00fdm sekund\u00e1m. Soustru\u017enicko-fr\u00e9zovac\u00ed centra vy\u017eaduj\u00edc\u00ed \u00fahlov\u00e9 polohov\u00e1n\u00ed \u00b15\u2033 pou\u017e\u00edvaj\u00ed p\u0159evodovku pouze jako n\u00e1sobi\u010d momentu \u2013 skute\u010dn\u00e1 \u00fahlov\u00e1 poloha je \u0159\u00edzena m\u011b\u0159\u00edtkov\u00fdm kod\u00e9rem namontovan\u00fdm na stole osy C, nikoli kod\u00e9rem motoru. V\u016fle p\u0159evodovky ur\u010duje, jak\u00e9 p\u0159edp\u011bt\u00ed mus\u00ed servo vyvinout, aby se p\u0159evzala mrtv\u00e1 z\u00f3na, ne\u017e m\u016f\u017ee p\u0159evz\u00edt \u0159\u00edzen\u00ed zp\u011btn\u00e9 vazby polohy.<\/div>\n<\/div>\n

<\/p>\n

\n
\n
OSA A<\/div>\n
\u010cep port\u00e1lov\u00e9 fr\u00e9zky \u2014 nakl\u00e1p\u011bn\u00ed v ose A na port\u00e1lov\u00e9m obr\u00e1b\u011bc\u00edm centru<\/div>\n<\/div>\n
\n
Charakteristika:<\/strong>
\nRozsah n\u00e1klonu \u00b145\u00b0 a\u017e \u00b190\u00b0
\nV\u0159eteno s hlavou: 40\u2013120 kg
\nGravita\u010dn\u00ed zat\u00ed\u017een\u00ed p\u0159i maxim\u00e1ln\u00edm n\u00e1klonu: pln\u00e1 hmotnost hlavy p\u0159i R=200\u2013400 mm
\nB\u011bhem \u0159ez\u00e1n\u00ed je nutn\u00e9 dr\u017eet polohu proti gravitaci
\nObvykle bez up\u00ednac\u00ed brzdy \u2013 p\u0159evodovka mus\u00ed dr\u017eet staticky<\/div>\n
Anal\u00fdza gravita\u010dn\u00edho zat\u00ed\u017een\u00ed:<\/strong>
\nV\u0159etenov\u00e1 hlava 60 kg, R=300 mm p\u0159i pln\u00e9m naklopen\u00ed:
\nT_gravitace = 60 \u00d7 9,81 \u00d7 0,3 = 176,6 N\u00b7m
\nPo\u017eadovan\u00fd utahovac\u00ed moment (s SF=2,0): 353 N\u00b7m
\nToto je statick\u00e9 zat\u00ed\u017een\u00ed \u2013 p\u0159ipo\u010d\u00edtejte dynamick\u00fd \u0159ezn\u00fd moment
\nCelkov\u00fd po\u017eadavek \u010dasto 400\u2013700 N\u00b7m<\/div>\n
Doporu\u010deno:<\/strong>
\nLehk\u00e1 port\u00e1lov\u00e1 hlava (40\u201360 kg):
\n\u2192 EP-ZDS-115 nebo ZDE-160, 16\u201320:1
\nT\u011b\u017ek\u00e1 port\u00e1lov\u00e1 hlava (80\u2013150 kg):
\n\u2192 EP-ZDS-142, 16:1, Ct=44 N\u00b7m\/\u00fahlovou minutu
\nVelmi t\u011b\u017ek\u00e1 (150 kg+):
\n\u2192 EP-ZDS-190, 16\u201320:1, Ct=130 N\u00b7m\/\u00fahlovou minutu<\/div>\n<\/div>\n<\/div>\n

<\/p>\n

\n
\n
4. \/ 5. OSA<\/div>\n
P\u0159\u00eddavn\u00fd oto\u010dn\u00fd st\u016fl VMC \u2013 \u010depov\u00e1 jednotka 4.\/5. osy<\/div>\n<\/div>\n
\n
Nejb\u011b\u017en\u011bj\u0161\u00ed v korejsk\u00fdch obchodech:<\/strong>
\nSamostatn\u00e9 p\u0159\u00eddavn\u00e9 oto\u010dn\u00e9 stoly (4. osa) nebo dvouos\u00fd \u010dep (4. + 5. osa)
\nPr\u016fm\u011br stolu: \u03a6200\u2013\u03a6400 mm
\nHmotnost obrobku: typicky 20\u201380 kg
\n\u010casto se pou\u017e\u00edv\u00e1 p\u0159i pln\u00e9m zahlcen\u00ed chladivou \u2013 kryt\u00ed IP65
\nPouze polohov\u00e1n\u00ed (bez plynul\u00e9ho ot\u00e1\u010den\u00ed)<\/div>\n
Priorita p\u0159esnosti:<\/strong>
\nIndexov\u00e1n\u00ed 4. osy: typicky \u00b110\u201330\u2033 \u00fahlu
\nV kombinaci se \u0161nekov\u00fdm nebo planetov\u00fdm p\u0159evodem a enkod\u00e9rem
\nPlanet\u00e1rn\u00ed p\u0159\u00edstup: kompaktn\u00ed, efektivn\u00ed, n\u00edzk\u00fd BL
\nEP-ZDE-120 (Ct=12 N\u00b7m\/\u00fahl.min, BL <8): vhodn\u00e9 pro v\u011bt\u0161inu 4. osy VMC
\nT\u011b\u017ek\u00fd obrobek nebo p\u0159eru\u0161ovan\u00fd \u0159ez: upgrade na EP-ZDS-115<\/div>\n
Doporu\u010deno:<\/strong>
\nLehk\u00fd st\u016fl (obrobek 20\u201340 kg):
\n\u2192 EP-ZDE-120, 10\u201316:1 (IP54 v p\u0159\u00edpad\u011b intern\u00edho stroje)
\nSt\u0159edn\u00ed st\u016fl (40\u201380 kg, s chladic\u00ed kapalinou):
\n\u2192 EP-ZDS-115, 16\u201320:1, IP65
\nT\u011b\u017ek\u00fd st\u016fl (>80 kg nebo t\u011b\u017ek\u00fd p\u0159eru\u0161ovan\u00fd \u0159ez):
\n\u2192 EP-ZDS-142, 16:1, IP65, Ct=44<\/div>\n<\/div>\n<\/div>\n<\/section>\n

<\/p>\n

\n

Pro\u010d torzn\u00ed tuhost ur\u010duje toleranci d\u00edlu v t\u011b\u017ek\u00fdch CNC operac\u00edch<\/h2>\n

P\u0159i p\u0159eru\u0161ovan\u00fdch fr\u00e9zovac\u00edch \u0159ezech, \u010deln\u00edm fr\u00e9zov\u00e1n\u00ed s velk\u00fdmi fr\u00e9zami a soustru\u017een\u00ed obt\u00ed\u017en\u00fdch materi\u00e1l\u016f se \u0159ezn\u00fd moment rychle m\u011bn\u00ed mezi t\u00e9m\u011b\u0159 nulovou hodnotou (p\u0159i \u0159ez\u00e1n\u00ed vzduchem) a pln\u00fdm \u0159ezn\u00fdm momentem (p\u0159i pln\u00e9m z\u00e1b\u011bru). Ka\u017ed\u00fd cyklus z\u00e1b\u011bru\/rozpojen\u00ed vyv\u00edj\u00ed do p\u0159evodovky impuls, kter\u00fd zp\u016fsobuje elastick\u00e9 nav\u00edjen\u00ed a odpru\u017een\u00ed v\u00fdstupn\u00ed h\u0159\u00eddele. Tato elastick\u00e1 oscilace \u2013 prob\u00edhaj\u00edc\u00ed na kontaktn\u00ed frekvenci fr\u00e9zy \u2013 zp\u016fsobuje drsnost povrchu, polygon\u00e1ln\u00ed stopy na vyvrtan\u00fdch otvorech a chv\u011bn\u00ed na soustru\u017een\u00fdch ploch\u00e1ch.<\/p>\n

\n\n\n\n\n\n\n\n\n
Sc\u00e9n\u00e1\u0159 \u0159ez\u00e1n\u00ed<\/th>\nT_peak (N\u00b7m)<\/th>\nZDE-160
\nelastick\u00e1 chyba<\/th>\n		ZDS-142
\nelastick\u00e1 chyba<\/th>\n		ZDS-190
\nelastick\u00e1 chyba<\/th>\n		P\u0159i R=100 mm
\nV\u00fdhoda ZDS-190<\/th>\n<\/tr>\n<\/thead>\n
Lehk\u00fd hlin\u00edkov\u00fd obklad<\/td>\n80 N\u00b7m<\/td>\n2,1 \u00fahlov\u00fdch minut
\n0,122 mm p\u0159i R=100<\/span><\/td>\n		1,8 \u00fahlov\u00fdch minut
\n0,105 mm p\u0159i R=100<\/span><\/td>\n		0,6 \u00fahlov\u00fdch minut
\n0,035 mm p\u0159i R=100<\/span><\/td>\n		3,4\u00d7<\/td>\n<\/tr>\n
Hrub\u00e9 fr\u00e9zov\u00e1n\u00ed oceli<\/td>\n200 N\u00b7m<\/td>\n5,3 \u00fahlov\u00fdch minut
\n0,308 mm p\u0159i R=100<\/span><\/td>\n		4,5 \u00fahlov\u00fdch minut
\n0,262 mm p\u0159i R=100<\/span><\/td>\n		1,5 \u00fahlov\u00e9 minuty
\n0,087 mm p\u0159i R=100<\/span><\/td>\n		3,4\u00d7<\/td>\n<\/tr>\n
T\u011b\u017ek\u00e9 ocelov\u00e9 vrt\u00e1n\u00ed<\/td>\n380 N\u00b7m<\/td>\n10,0 \u00fahlov\u00fdch minut
\n0,581 mm p\u0159i R=100<\/span><\/td>\n		8,6 \u00fahlov\u00fdch minut
\n0,500 mm p\u0159i R=100<\/span><\/td>\n		2,9 \u00fahlov\u00fdch minut
\n0,169 mm p\u0159i R=100<\/span><\/td>\n		3,4\u00d7<\/td>\n<\/tr>\n
P\u0159eru\u0161ovan\u00fd \u0159ez Inconelem<\/td>\n600 N\u00b7m<\/td>\n15,8 \u00fahlov\u00fdch minut
\n0,919 mm p\u0159i R=100<\/span><\/td>\n		13,6 \u00fahlov\u00fdch minut
\n0,791 mm p\u0159i R=100<\/span><\/td>\n		4,6 \u00fahlov\u00fdch minut
\n0,267 mm p\u0159i R=100<\/span><\/td>\n		3,4\u00d7<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

Elastick\u00e1 chyba = T_peak \/ Ct. ZDE-160: Ct=38; ZDS-142: Ct=44; ZDS-190: Ct=130 N\u00b7m\/\u00fahl. P\u0159i R=100 mm s pou\u017eit\u00edm E = R \u00d7 tan(\u03b8\/3438). Kod\u00e9r servomotoru nedok\u00e1\u017ee detekovat tuto elastickou v\u00fdchylku \u2013 ta se p\u0159\u00edmo hromad\u00ed jako rozm\u011brov\u00e1 chyba obrobku.<\/p>\n

\n

D\u016fsledky pro design:<\/strong> U CNC operac\u00ed, kde polom\u011br \u0159ezu p\u0159esahuje 50 mm a \u0161pi\u010dkov\u00fd \u0159ezn\u00fd moment p\u0159esahuje 200 N\u00b7m, p\u0159ekra\u010duje chyba elastick\u00e9ho pr\u016fhybu u ZDE-160 (0,308 mm p\u0159i R=100 mm, T=200 N\u00b7m) toleranci IT8 pro v\u011bt\u0161inu velikost\u00ed otvor\u016f. ZDS-190 tuto chybu sni\u017euje na 0,087 mm \u2013 v r\u00e1mci toleran\u010dn\u00edho rozsahu IT7. Pro ob\u011b \u0159ady plat\u00ed stejn\u00e1 specifikace v\u016fle (<8 \u00fahlov\u00fdch minut); samotn\u00fd rozd\u00edl tuhosti vede ke zlep\u0161en\u00ed p\u0159esnosti, kter\u00e9 p\u0159\u00edsn\u011bj\u0161\u00ed specifikace v\u016fle nedok\u00e1\u017ee replikovat.<\/p>\n<\/div>\n<\/section>\n

<\/p>\n

\n

\"Kompletn\u00ed<\/p>\n

P\u0159esn\u00e9 planetov\u00e9 p\u0159evodovky \u0159ady EP pro CNC rota\u010dn\u00ed osy se dod\u00e1vaj\u00ed s certifika\u010dn\u00edm dokumentem od v\u00fdrobce, kter\u00fd specifikuje v\u016fli p\u0159i jmenovit\u00e9m momentu \u00b13%, torzn\u00ed tuhost Ct a maxim\u00e1ln\u00ed limity radi\u00e1ln\u00ed\/axi\u00e1ln\u00ed s\u00edly \u2013 t\u0159i specifikace, kter\u00e9 jsou nejd\u016fle\u017eit\u011bj\u0161\u00ed pro ov\u011b\u0159en\u00ed v\u00fdkonu os CNC obr\u00e1b\u011bc\u00edch stroj\u016f. Zobrazit technick\u00e9 specifikace \u0159ady EP \u2192<\/a><\/div>\n<\/div>\n

<\/p>\n

\n

Chladic\u00ed prost\u0159ed\u00ed a stupe\u0148 kryt\u00ed IP \u2013 p\u0159izp\u016fsoben\u00ed ochrany realit\u011b CNC<\/h2>\n

Rozhodnut\u00ed o stupni kryt\u00ed IP pro p\u0159evodovku s rota\u010dn\u00ed osou CNC nen\u00ed obecnou volbou \u201euvnit\u0159 stroje = IP54\u201c. Skute\u010dn\u00e9 vystaven\u00ed chladic\u00ed kapalin\u011b z\u00e1vis\u00ed na poloze p\u0159evodovky vzhledem k dr\u00e1ze proud\u011bn\u00ed chladic\u00ed kapaliny, na konstrukci krytu stroje a na tom, zda je rota\u010dn\u00ed osa integrov\u00e1na do stroje nebo je p\u0159id\u00e1na extern\u011b. Nespr\u00e1vn\u00e1 volba stupn\u011b kryt\u00ed IP vede k selh\u00e1n\u00ed zp\u016fsoben\u00e9mu kontaminac\u00ed popsan\u00e9mu v p\u0159\u00ed\u010din\u00e1ch selh\u00e1n\u00ed \u2013 kter\u00e9 se v prost\u0159ed\u00ed CNC obvykle projev\u00ed b\u011bhem 2 000\u20134 000 hodin.<\/p>\n

\n
\n
\u2705 IP54 Adekv\u00e1tn\u00ed \u2014 EP-ZDE\/ZDF\/ZDWE\/ZDWF<\/div>\n