{"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\/sk\/planetary-gearbox-cnc-machine-tool-rotary-axis-selection\/","title":{"rendered":"V\u00fdber presnej plan\u00e9tovej prevodovky pre rota\u010dn\u00e9 osi CNC obr\u00e1bac\u00edch strojov"},"content":{"rendered":"
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K\u00f3rea Ever-Power<\/span>
\nSprievodca aplik\u00e1ciou CNC obr\u00e1bac\u00edch strojov<\/span><\/div>\n

V\u00fdber presnej plan\u00e9tovej prevodovky pre rota\u010dn\u00e9 osi CNC obr\u00e1bac\u00edch strojov \u2013 os B\/C\/A a vedenie 4.\/5. osi<\/h1>\n

CNC rota\u010dn\u00e9 osi klad\u00fa po\u017eiadavky, ktor\u00e9 v\u0161eobecn\u00e9 servo vedenia nerie\u0161ia. Presnos\u0165 vyvrt\u00e1vacej oper\u00e1cie z\u00e1vis\u00ed priamo od v\u00f4le prevodovky na polomere rezu \u2013 nie v \u013eubovo\u013enom testovacom bode. 5-osov\u00e1 os B pri \u0165a\u017ekom preru\u0161ovanom reze vy\u017eaduje torzn\u00fa tuhos\u0165, ktor\u00fa v\u0161eobecn\u00e1 servo aplik\u00e1cia nikdy nevy\u017eaduje. Zaplavenie chladiacou kvapalinou vy\u017eaduje krytie IP65. T\u00e1to pr\u00edru\u010dka rie\u0161i v\u0161etky tri obmedzenia os po osi.<\/p>\n

Z\u00edskajte podporu pre \u0161pecifik\u00e1cie CNC os\u00ed \u2192<\/a><\/p>\n<\/div>\n<\/div>\n<\/section>\n

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Tri po\u017eiadavky, ktor\u00e9 odli\u0161uj\u00fa rota\u010dn\u00e9 osi CNC od v\u0161eobecn\u00fdch servo aplik\u00e1ci\u00ed<\/h2>\n

V\u00e4\u010d\u0161ina metod\u00edk v\u00fdberu presn\u00fdch plan\u00e9tov\u00fdch prevodoviek je nap\u00edsan\u00e1 pre v\u0161eobecn\u00fa servo automatiz\u00e1ciu \u2013 dopravn\u00edky, roboty, deliace zariadenia. Rota\u010dn\u00e9 osi CNC obr\u00e1bac\u00edch strojov zav\u00e1dzaj\u00fa tri \u010fal\u0161ie po\u017eiadavky, ktor\u00e9 tieto pr\u00edru\u010dky nerie\u0161ia, a nezoh\u013eadnenie ktorejko\u013evek z nich vedie k \u0161pecifik\u00e1cii prevodovky, ktor\u00e1 je technicky spr\u00e1vna pre kr\u00fatiaci moment a r\u00fdchlos\u0165, ale nespr\u00e1vna pre dan\u00fa aplik\u00e1ciu.<\/p>\n

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\u2460 V\u00f4\u013ea na polomere rezu \u2013 nie v generickom kontrolnom bode<\/div>\n

\u0160pecifik\u00e1cie presnosti CNC uv\u00e1dzaj\u00fa tolerancie na obrobku \u2013 pri skuto\u010dnom polomere rezu, ktor\u00fd m\u00f4\u017ee by\u0165 10 mm (mal\u00fd otvor) alebo 300 mm (ve\u013ek\u00e9 \u010deln\u00e9 obr\u00e1banie). T\u00e1 ist\u00e1 v\u00f4\u013ea 8 obl\u00fakov\u00fdch min\u00fat vytv\u00e1ra tangenci\u00e1lnu chybu 23 \u03bcm pri R = 10 mm, ale 1 163 \u03bcm pri R = 500 mm. \u0160pecifik\u00e1cie CNC sa musia v\u017edy vyhodnocova\u0165 pri skuto\u010dnom polomere rezu, nie pri reprezentat\u00edvnej medzihodnote. V\u00f4\u013ea, ktor\u00e1 je prijate\u013en\u00e1 pre jednu oper\u00e1ciu, m\u00f4\u017ee \u00faplne zlyha\u0165 pri inej na tom istom stroji.<\/p>\n<\/div>\n

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\u2461 Torzn\u00e1 tuhos\u0165 pri reznom za\u0165a\u017een\u00ed \u2013 nielen presnos\u0165 polohovania<\/div>\n

CNC rezn\u00e9 za\u0165a\u017eenia s\u00fa vysoko variabiln\u00e9 \u2013 kr\u00fatiaci moment sa men\u00ed okam\u017eite s hr\u00fabkou triesky, zmenami materi\u00e1lu a vstupom\/v\u00fdstupom n\u00e1stroja. Pri \u0161pi\u010dkovom reznom kr\u00fatiacom momente 380 N\u00b7m sa EP-ZDE-160 (Ct=38 N\u00b7m\/arcmin) elasticky vych\u00fdli o 10 arcmin \u2013 viac ako je \u0161pecifikovan\u00e1 v\u00f4\u013ea \u2013 \u010do sp\u00f4sob\u00ed chybu polohy n\u00e1stroja, ktor\u00fa sp\u00e4tn\u00e1 v\u00e4zba serva nedok\u00e1\u017ee zisti\u0165 ani opravi\u0165, preto\u017ee k\u00f3dova\u010d motora je na vstupnej strane prevodovky. T\u00e1to chyba z\u00e1visl\u00e1 od za\u0165a\u017eenia je pre servo nevidite\u013en\u00e1, priamo sa hromad\u00ed v obrobku a zhor\u0161uje sa s amplit\u00fadou reznej sily.<\/p>\n<\/div>\n

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\u2462 Chladiaca kvapalina \u2013 Krytie IP ur\u010duje \u017eivotnos\u0165<\/div>\n

CNC obr\u00e1bacie stroje pou\u017e\u00edvaj\u00fa zaplavovaciu chladiacu kvapalinu s tlakom 2 \u2013 8 barov, hmlu z rezn\u00e9ho oleja a pravideln\u00e9 vn\u00fatorn\u00e9 um\u00fdvanie stroja. Prevodovka nain\u0161talovan\u00e1 na externom oto\u010dnom stole umiestnenom pod vretenom m\u00f4\u017ee prij\u00edma\u0165 priamy pr\u00fad chladiacej kvapaliny pri plnom tlaku \u010derpadla. Stupe\u0148 krytia IP54 (\u0161tandard pre EP-ZDE\/ZDF\/ZDWE\/ZDWF) chr\u00e1ni pred smerov\u00fdm striekan\u00edm, ale nie pred trval\u00fdmi priamymi pr\u00fadmi. Iba stupe\u0148 krytia IP65 (EP-ZDS) odol\u00e1va testu IPX5 \u2013 tryska s priemerom 6,3 mm pri prietoku 12,5 l\/min z ak\u00e9hoko\u013evek smeru \u2013 \u010do sa pribli\u017euje podmienkam zaplavovacej chladiacej kvapaliny na exponovan\u00fdch rota\u010dn\u00fdch up\u00ednac\u00edch pr\u00edpravkoch.<\/p>\n<\/div>\n<\/div>\n<\/section>\n

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\"V\u00fdroba<\/p>\n

Presn\u00e9 plan\u00e9tov\u00e9 prevodovky s\u00e9rie EP s\u00fa pred odoslan\u00edm testovan\u00e9 na v\u00f4\u013eu pod\u013ea normy 100% pri menovitom kr\u00fatiacom momente \u00b13%. Ka\u017ed\u00e1 jednotka m\u00e1 v dokument\u00e1cii v\u00fdrobcu certifikovan\u00fa hodnotu v\u00f4le \u2013 sledovate\u013enos\u0165 po\u017eadovan\u00fa syst\u00e9mami riadenia kvality OEM pre CNC obr\u00e1bacie stroje. Zobrazi\u0165 \u0161pecifik\u00e1cie s\u00e9rie EP \u2192<\/a><\/div>\n<\/div>\n

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V\u00f4\u013ea na va\u0161om polomere rezu \u2013 st\u00f4l, ktor\u00fd potrebuj\u00fa CNC in\u017einieri<\/h2>\n

Nasleduj\u00faca tabu\u013eka prepo\u010d\u00edtava \u0161tandardn\u00e9 \u0161pecifik\u00e1cie v\u00f4le plan\u00e9tovej prevodovky na tangenci\u00e1lnu chybu polohovania pri reprezentat\u00edvnych CNC polomeroch rezania. V\u0161etky hodnoty pou\u017e\u00edvaj\u00fa presn\u00fd vzorec: E_tangenci\u00e1lna = R \u00d7 tan(BL \/ (60 \u00d7 180\/\u03c0)). Pri vyvrt\u00e1vac\u00edch a s\u00fastru\u017en\u00edckych oper\u00e1ci\u00e1ch, kde n\u00e1stroj sleduje kruhov\u00fa dr\u00e1hu, sa t\u00e1to tangenci\u00e1lna chyba prejavuje priamo ako odch\u00fdlka kruhovitosti na obrobenom povrchu.<\/p>\n

\n\n\n\n\n\n\n\n\n
Negat\u00edvna reakcia<\/th>\nR=10 mm
\nMal\u00fd otvor<\/span><\/th>\n		R=25 mm
\nV\u0155tanie s priemerom \u03a650 mm<\/span><\/th>\n		R=50 mm
\nVrt \u03a6100 mm<\/span><\/th>\n		R=100 mm
\n\u03a6200 mm tv\u00e1r<\/span><\/th>\n		R=200 mm
\nSt\u00f4l s priemerom \u03a6400 mm<\/span><\/th>\n		S\u00e9ria EP<\/th>\n<\/tr>\n<\/thead>\n
<3 uhlov\u00fdch min\u00fat<\/td>\n8,7 \u03bcm<\/td>\n21,8 \u03bcm<\/td>\n43,6 \u03bcm<\/td>\n87,3 \u03bcm<\/td>\n174,5 \u03bcm<\/td>\nZ\u00e1kazkov\u00e1 \/ \u0161peci\u00e1lna objedn\u00e1vka<\/td>\n<\/tr>\n
<8 obl\u00fakov\u00fdch min\u00fat \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\u0161etky)<\/td>\n<\/tr>\n
<12 obl\u00fakov\u00fdch min\u00fat<\/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\u00fd; 2-stup\u0148ov\u00e9 jednotky<\/td>\n<\/tr>\n
<25 obl\u00fakov\u00fdch min\u00fat<\/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 iba pravouhl\u00fd vstup<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

\u2605 \u0160tandardn\u00fd rad EP-ZDE\/ZDF\/ZDS. Hodnoty predstavuj\u00fa maxim\u00e1lnu chybu v\u00f4le pred kompenz\u00e1ciou v\u00f4le CNC. Pri akt\u00edvnej kompenz\u00e1cii v\u00f4le Fanuc\/Siemens je zvy\u0161kov\u00e1 chyba pri n\u00edzkych posuvoch typicky <10% nekompenzovanej hodnoty. Hodnoty zv\u00fdraznen\u00e9 tu\u010dnou \u010dervenou farbou presahuj\u00fa toleranciu IT7 pre dan\u00fd priemer otvoru \u2013 aplik\u00e1cia vy\u017eaduje bu\u010f men\u0161iu v\u00f4\u013eu, kompenz\u00e1ciu, alebo v\u00e4\u010d\u0161iu \u0161pecifik\u00e1ciu tolerancie otvoru.<\/p>\n

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\u010c\u00edtanie tejto tabu\u013eky pre konkr\u00e9tnu oper\u00e1ciu<\/div>\n

V\u0155tanie otvoru s priemerom \u03a6100 mm (R=50 mm) na 4. osi na VMC s EP-ZDE-120 (<8 arcmin) vytv\u00e1ra maxim\u00e1lnu chybu kruhovitosti vyvolan\u00fa v\u00f4\u013eou 116,4 \u03bcm na ot\u00e1\u010dku. S kompenz\u00e1ciou v\u00f4le Fanuc Series 0i sa t\u00e1to chyba zni\u017euje na pribli\u017ene 12 \u2013 20 \u03bcm \u2013 \u010do je kompatibiln\u00e9 s toleranciou IT8. Bez kompenz\u00e1cie zlyh\u00e1va rovnak\u00fd otvor s toleranciou IT7 (25 \u03bcm pre otvor s priemerom \u03a6100 mm). Zadajte kompenz\u00e1ciu v\u00f4le v CNC programe alebo prejdite na EP-ZDS, aby ste zn\u00ed\u017eili pr\u00edspevok v\u00f4le k rozpo\u010dtu ch\u00fdb.<\/p>\n<\/div>\n<\/section>\n

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\u0160pecifik\u00e1cie rota\u010dnej osi CNC \u2013 os B\/C\/A a 4.\/5. os, os po osi<\/h2>\n

P\u00e4\u0165 typov rota\u010dn\u00fdch os\u00ed pou\u017e\u00edvan\u00fdch v k\u00f3rejsk\u00fdch CNC obr\u00e1bac\u00edch strojoch m\u00e1 odli\u0161n\u00e9 prim\u00e1rne kon\u0161truk\u010dn\u00e9 ovl\u00e1da\u010de. T\u00e1 ist\u00e1 jednotka s\u00e9rie EP, ktor\u00e1 je spr\u00e1vna pre \u010dap 4. osi na vertik\u00e1lnom obr\u00e1bacom centre, bude nedostato\u010dn\u00e1 pre os B na 5-osovom obr\u00e1bacom centre a nespr\u00e1vna pre os C na s\u00fastru\u017en\u00edcko-fr\u00e9zovacom centre, ktor\u00e9 za\u017e\u00edva pln\u00e9 kr\u00fatiace momenty. Ni\u017e\u0161ie uveden\u00e1 anal\u00fdza jednotliv\u00fdch os\u00ed rie\u0161i spr\u00e1vnu \u0161pecifik\u00e1ciu pre ka\u017ed\u00fa z nich.<\/p>\n

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OSA B<\/div>\n
5-osov\u00e9 obr\u00e1bacie centrum \u2013 nakl\u00e1pac\u00ed oto\u010dn\u00fd st\u00f4l alebo hlava<\/div>\n<\/div>\n
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Prim\u00e1rne po\u017eiadavky:<\/strong>
\nRozsah sklonu \u00b190\u00b0 alebo \u00b1110\u00b0
\nMaxim\u00e1lny rezn\u00fd kr\u00fatiaci moment: 150\u2013600 N\u00b7m v z\u00e1vislosti od ve\u013ekosti
\n\u0164a\u017ek\u00e9 preru\u0161ovan\u00e9 rezy v tit\u00e1ne\/Inconeli
\nUp\u00ednac\u00ed moment: 2\u20133\u00d7 rezn\u00fd kr\u00fatiaci moment
\nMinim\u00e1lne IP54 (chladiaca hmla); IP65 pre extern\u00e9 svietidlo<\/div>\n
Kritick\u00e1 \u0161pecifik\u00e1cia:<\/strong>
\nTorzn\u00e1 tuhos\u0165 dominuje nad kr\u00ed\u017eov\u00fdm kr\u00fatiacim momentom
\nKr\u00fatiaci moment ZDS-142: 352 N\u00b7m (BL \u00d7 Ct = 8 \u00d7 44)
\nV\u00fdhybka ZDE-160: 304 N\u00b7m (8 \u00d7 38)
\nPre T_cut > 304 N\u00b7m: elastick\u00e1 chyba prevy\u0161uje v\u00f4\u013eu
\n\u2192 pr\u00edsnej\u0161ie \u0161pecifik\u00e1cie v\u00f4le nepom\u00f4\u017eu; vy\u0161\u0161ie Ct \u00e1no<\/div>\n
Odpor\u00fa\u010dan\u00e9:<\/strong>
\nStredn\u00e1 5-osov\u00e1 (T_cut \u2264 250 N\u00b7m):
\n\u2192 EP-ZDS-115<\/a>, 20:1, Ct=20 N\u00b7m\/obl\u00fakov\u00e1 min\u00fata
\n\u0164a\u017ek\u00e1 5-osov\u00e1 (T_cut 250 \u2013 600 N\u00b7m):
\n\u2192 EP-ZDS-142, 20:1, Ct=44 N\u00b7m\/obl\u00fakov\u00e1 min\u00fata
\nVe\u013emi \u0165a\u017ek\u00e9 (T_cut > 600 N\u00b7m):
\n\u2192 EP-ZDS-190, 20\u201325:1, Ct=130 N\u00b7m\/obl\u00fakov\u00e1 min\u00fata<\/div>\n<\/div>\n
Kontrola zotrva\u010dnosti:<\/strong> Os B nakl\u00e1\u0148a cel\u00fd oto\u010dn\u00fd st\u00f4l alebo vretenov\u00fa hlavu. Pre nakl\u00e1pac\u00ed st\u00f4l s hmotnos\u0165ou 50 kg pri R=200 mm: J_za\u0165a\u017eenie = 50\u00d70,20\u00b2 = 2,0 kg\u00b7m\u00b2. i_optim\u00e1lne = \u221a(2,0\/0,006) = 18,3 \u2013 \u010do potvrdzuje, \u017ee pomer 20:1 je spr\u00e1vny. Pri 20:1 je J_odrazen\u00e9 = 2,0\/400 = 0,005 kg\u00b7m\u00b2 \u2013 pomer zotrva\u010dnosti 0,83:1 (mierne nedostato\u010dne odrazen\u00e9), \u010do je prijate\u013en\u00e9 a umo\u017e\u0148uje pln\u00e9 Kv serva.<\/div>\n<\/div>\n

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OSA C<\/div>\n
S\u00fastru\u017en\u00edcko-fr\u00e9zovacie centrum \u2013 polohovanie hlavn\u00e9ho vretena a fr\u00e9zovacia a s\u00fastru\u017en\u00edcka os C<\/div>\n<\/div>\n
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Dva odli\u0161n\u00e9 prev\u00e1dzkov\u00e9 re\u017eimy:<\/strong>
\nRe\u017eim s\u00fastru\u017eenia: Os C je pohon vretena \u2013 vysok\u00fd kr\u00fatiaci moment, plynul\u00e1 rot\u00e1cia, nie je potrebn\u00e1 presnos\u0165 polohy
\nRe\u017eim fr\u00e9zovania\/polohovania: os C indexuje presn\u00fd uhol pre fr\u00e9zovanie mimo stredu \u2013 presnos\u0165 polohy je kritick\u00e1<\/div>\n
Po\u017eiadavky na presn\u00fd re\u017eim:<\/strong>
\nPresnos\u0165 indexu: \u00b15\u201315\u2033 obl\u00faka (obl\u00fakov\u00e9 sekundy)
\n8 obl\u00fakov\u00fdch min\u00fat = 480 obl\u00fakov\u00fdch sek\u00fand \u2013 pr\u00edli\u0161 \u0161irok\u00fd uhol pre cie\u013e \u00b15\u2033
\nPresnos\u0165 osi C: vy\u017eaduje uzatvoren\u00fa slu\u010dku prevodovky + enkod\u00e9ra
\nPrevodovka nastavuje spodn\u00fa hranicu presnosti, ktor\u00fa mus\u00ed sn\u00edma\u010d prekona\u0165 korekciou v uzavretej slu\u010dke.<\/div>\n
Odpor\u00fa\u010dan\u00e9:<\/strong>
\nPolohovanie osi C (fr\u00e9zovanie-s\u00fastru\u017eenie):
\n\u2192 EP-ZDE-160 alebo EP-ZDS-115 v \u010dase 10\u201316:1
\nBL <8 arcmin; v kombin\u00e1cii s enkod\u00e9rom Heidenhain\/Renishaw pre presnos\u0165 \u00b115\u2033
\nExpoz\u00edcia chladiacej kvapaliny pri zaplaven\u00ed: \u0161pecifikujte EP-ZDS-115\/142<\/div>\n<\/div>\n
Kritick\u00e1 pozn\u00e1mka k presnosti osi C:<\/strong> V\u00f4\u013ea <8 obl\u00fakov\u00fdch min\u00fat u EP-ZDE\/ZDS zodpoved\u00e1 480 obl\u00fakov\u00fdm sekund\u00e1m. S\u00fastru\u017en\u00edcko-fr\u00e9zovacie centr\u00e1 vy\u017eaduj\u00face uhlov\u00e9 polohovanie \u00b15\u2033 pou\u017e\u00edvaj\u00fa prevodovku iba ako multiplik\u00e1tor kr\u00fatiaceho momentu \u2013 skuto\u010dn\u00e1 uhlov\u00e1 poloha je riaden\u00e1 stupnicov\u00fdm sn\u00edma\u010dom namontovan\u00fdm na stole osi C, nie sn\u00edma\u010dom motora. V\u00f4\u013ea prevodovky ur\u010duje, ak\u00e9 ve\u013ek\u00e9 predp\u00e4tie mus\u00ed servopohon vyvin\u00fa\u0165, aby sa zabezpe\u010dilo p\u00e1smo necitlivosti predt\u00fdm, ako m\u00f4\u017ee prevzia\u0165 riadenie sp\u00e4tnej v\u00e4zby polohy.<\/div>\n<\/div>\n

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OSA A<\/div>\n
\u010cap port\u00e1lovej fr\u00e9zy \u2014 nakl\u00e1panie osi A na port\u00e1lovom obr\u00e1bacom centre<\/div>\n<\/div>\n
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Charakteristiky:<\/strong>
\nRozsah sklonu \u00b145\u00b0 a\u017e \u00b190\u00b0
\nZostava vretena a hlavy: 40 \u2013 120 kg
\nTia\u017eov\u00e9 za\u0165a\u017eenie pri maxim\u00e1lnom n\u00e1klone: \u200b\u200bpln\u00e1 hmotnos\u0165 hlavy pri R=200\u2013400 mm
\nPo\u010das rezania mus\u00ed dr\u017ea\u0165 polohu proti gravit\u00e1cii
\nZvy\u010dajne bez up\u00ednacej brzdy \u2013 prevodovka mus\u00ed dr\u017ea\u0165 staticky<\/div>\n
Anal\u00fdza gravita\u010dn\u00e9ho za\u0165a\u017eenia:<\/strong>
\nVretenov\u00e1 hlava s hmotnos\u0165ou 60 kg, R = 300 mm pri plnom sklone:
\nT_gravit\u00e1cia = 60 \u00d7 9,81 \u00d7 0,3 = 176,6 N\u00b7m
\nPo\u017eadovan\u00fd u\u0165ahovac\u00ed moment (s SF=2,0): 353 N\u00b7m
\nToto je statick\u00e9 za\u0165a\u017eenie \u2013 pridajte dynamick\u00fd rezn\u00fd kr\u00fatiaci moment
\nCelkov\u00e1 po\u017eiadavka \u010dasto 400 \u2013 700 N\u00b7m<\/div>\n
Odpor\u00fa\u010dan\u00e9:<\/strong>
\n\u013dahk\u00e1 port\u00e1lov\u00e1 hlava (40 \u2013 60 kg):
\n\u2192 EP-ZDS-115 alebo ZDE-160, 16\u201320:1
\n\u0164a\u017ek\u00e1 port\u00e1lov\u00e1 hlava (80 \u2013 150 kg):
\n\u2192 EP-ZDS-142, 16:1, Ct=44 N\u00b7m\/obl\u00fakov\u00e1 min\u00fata
\nVe\u013emi \u0165a\u017ek\u00e9 (150 kg+):
\n\u2192 EP-ZDS-190, 16\u201320:1, Ct=130 N\u00b7m\/obl\u00fakov\u00e1 min\u00fata<\/div>\n<\/div>\n<\/div>\n

<\/p>\n

\n
\n
4. \/ 5. OSA<\/div>\n
Pr\u00eddavn\u00fd oto\u010dn\u00fd st\u00f4l VMC \u2013 oto\u010dn\u00e1 jednotka 4.\/5. osi<\/div>\n<\/div>\n
\n
Najbe\u017enej\u0161ie v k\u00f3rejsk\u00fdch obchodoch:<\/strong>
\nSamostatn\u00e9 pr\u00eddavn\u00e9 oto\u010dn\u00e9 stoly (4. os) alebo dvojosov\u00fd \u010dap (4. + 5. os)
\nPriemer stola: \u03a6200\u2013\u03a6400 mm
\nHmotnos\u0165 obrobku: typicky 20 \u2013 80 kg
\n\u010casto sa pou\u017e\u00edva pri plnom zaplaven\u00ed chladiacou kvapalinou \u2013 krytie IP65
\nIba polohovanie (bez plynul\u00e9ho ot\u00e1\u010dania)<\/div>\n
Priorita presnosti:<\/strong>
\nIndexovanie 4. osi: typicky \u00b110\u201330\u2033 uhlov\u00fd bod
\nV kombin\u00e1cii so z\u00e1vitovkov\u00fdm alebo plan\u00e9tov\u00fdm prevodom a enkod\u00e9rom
\nPlanet\u00e1rny pr\u00edstup: kompaktn\u00fd, efekt\u00edvny, s n\u00edzkym BL
\nEP-ZDE-120 (Ct=12 N\u00b7m\/arcmin, BL <8): vhodn\u00e9 pre v\u00e4\u010d\u0161inu VMC 4. os
\n\u0164a\u017ek\u00fd obrobok alebo preru\u0161ovan\u00fd rez: upgrade na EP-ZDS-115<\/div>\n
Odpor\u00fa\u010dan\u00e9:<\/strong>
\n\u013dahk\u00fd st\u00f4l (obrobok 20 \u2013 40 kg):
\n\u2192 EP-ZDE-120, 10\u201316:1 (IP54 v pr\u00edpade intern\u00e9ho stroja)
\nStredn\u00fd st\u00f4l (40 \u2013 80 kg, s chladiacou kvapalinou):
\n\u2192 EP-ZDS-115, 16\u201320:1, IP65
\n\u0164a\u017ek\u00fd st\u00f4l (> 80 kg alebo \u0165a\u017ek\u00fd preru\u0161ovan\u00fd rez):
\n\u2192 EP-ZDS-142, 16:1, IP65, Ct=44<\/div>\n<\/div>\n<\/div>\n<\/section>\n

<\/p>\n

\n

Pre\u010do torzn\u00e1 tuhos\u0165 ur\u010duje toleranciu s\u00fa\u010diastky v \u0165a\u017ek\u00fdch CNC oper\u00e1ci\u00e1ch<\/h2>\n

Pri preru\u0161ovan\u00fdch fr\u00e9zovac\u00edch rezoch, \u010delnom fr\u00e9zovan\u00ed s ve\u013ek\u00fdmi fr\u00e9zami a s\u00fastru\u017een\u00ed n\u00e1ro\u010dn\u00fdch materi\u00e1lov sa rezn\u00fd kr\u00fatiaci moment r\u00fdchlo men\u00ed medzi takmer nulovou hodnotou (pri rezan\u00ed vzduchom) a pln\u00fdm rezn\u00fdm kr\u00fatiacim momentom (pri plnom z\u00e1bere). Ka\u017ed\u00fd cyklus z\u00e1beru\/rozberu aplikuje impulz na prevodovku, ktor\u00fd sp\u00f4sobuje elastick\u00e9 nav\u00edjanie a sp\u00e4tn\u00fd r\u00e1z v\u00fdstupn\u00e9ho hriade\u013ea. T\u00e1to elastick\u00e1 oscil\u00e1cia \u2013 ktor\u00e1 sa deje pri kontaktnej frekvencii fr\u00e9zy \u2013 sp\u00f4sobuje drsnos\u0165 povrchu, polyg\u00f3nov\u00e9 stopy na vyv\u0155tan\u00fdch otvoroch a vibr\u00e1cie na s\u00fastru\u017een\u00fdch povrchoch.<\/p>\n

\n\n\n\n\n\n\n\n\n
Scen\u00e1r rezania<\/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		Pri R=100 mm
\nV\u00fdhoda ZDS-190<\/th>\n<\/tr>\n<\/thead>\n
\u013dahk\u00fd hlin\u00edkov\u00fd obklad<\/td>\n80 N\u00b7m<\/td>\n2,1 uhlovej min\u00faty
\n0,122 mm pri R=100<\/span><\/td>\n		1,8 obl\u00fakov\u00fdch min\u00fat
\n0,105 mm pri R=100<\/span><\/td>\n		0,6 obl\u00fakovej min\u00faty
\n0,035 mm pri R=100<\/span><\/td>\n		3,4\u00d7<\/td>\n<\/tr>\n
Hrub\u00e9 fr\u00e9zovanie ocele<\/td>\n200 N\u00b7m<\/td>\n5,3 uhlov\u00fdch min\u00fat
\n0,308 mm pri R=100<\/span><\/td>\n		4,5 obl\u00fakov\u00fdch min\u00fat
\n0,262 mm pri R=100<\/span><\/td>\n		1,5 obl\u00fakovej min\u00faty
\n0,087 mm pri R=100<\/span><\/td>\n		3,4\u00d7<\/td>\n<\/tr>\n
\u0164a\u017ek\u00e9 oce\u013eov\u00e9 v\u0155tanie<\/td>\n380 N\u00b7m<\/td>\n10,0 uhlov\u00fdch min\u00fat
\n0,581 mm pri R=100<\/span><\/td>\n		8,6 obl\u00fakov\u00fdch min\u00fat
\n0,500 mm pri R=100<\/span><\/td>\n		2,9 obl\u00fakov\u00fdch min\u00fat
\n0,169 mm pri R=100<\/span><\/td>\n		3,4\u00d7<\/td>\n<\/tr>\n
Preru\u0161ovan\u00fd rez Inconel<\/td>\n600 N\u00b7m<\/td>\n15,8 obl\u00fakov\u00fdch min\u00fat
\n0,919 mm pri R=100<\/span><\/td>\n		13,6 obl\u00fakov\u00fdch min\u00fat
\n0,791 mm pri R=100<\/span><\/td>\n		4,6 obl\u00fakov\u00fdch min\u00fat
\n0,267 mm pri 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\/arcmin. Pri R=100 mm s pou\u017eit\u00edm E = R \u00d7 tan(\u03b8\/3438). Enk\u00f3der servomotora nedok\u00e1\u017ee detekova\u0165 t\u00fato elastick\u00fa v\u00fdchylku \u2013 t\u00e1 sa priamo akumuluje ako rozmerov\u00e1 chyba obrobku.<\/p>\n

\n

D\u00f4sledky dizajnu:<\/strong> Pri CNC oper\u00e1ci\u00e1ch, kde polomer rezu presahuje 50 mm a \u0161pi\u010dkov\u00fd kr\u00fatiaci moment presahuje 200 N\u00b7m, chyba elastick\u00e9ho vych\u00fdlenia zo ZDE-160 (0,308 mm pri R=100 mm, T=200 N\u00b7m) presahuje toleranciu IT8 pre v\u00e4\u010d\u0161inu ve\u013ekost\u00ed otvorov. ZDS-190 ju zni\u017euje na 0,087 mm \u2013 v r\u00e1mci toleran\u010dn\u00e9ho rozsahu IT7. Rovnak\u00e1 \u0161pecifik\u00e1cia v\u00f4le (<8 arcmin) plat\u00ed pre obe s\u00e9rie; rozdiel v tuhosti samotn\u00fd sp\u00f4sobuje zlep\u0161enie presnosti, ktor\u00e9 nie je mo\u017en\u00e9 replikova\u0165 pri pr\u00edsnej\u0161ej \u0161pecifik\u00e1cii v\u00f4le.<\/p>\n<\/div>\n<\/section>\n

<\/p>\n

\n

\"Kompletn\u00e1<\/p>\n

Presn\u00e9 plan\u00e9tov\u00e9 prevodovky s\u00e9rie EP pre CNC rota\u010dn\u00e9 osi sa dod\u00e1vaj\u00fa s certifika\u010dn\u00fdm dokumentom od v\u00fdrobcu, ktor\u00fd \u0161pecifikuje v\u00f4\u013eu pri menovitom kr\u00fatiacom momente \u00b13%, torzn\u00fa tuhos\u0165 Ct a maxim\u00e1lne limity radi\u00e1lnej\/axi\u00e1lnej sily \u2013 tri \u0161pecifik\u00e1cie, ktor\u00e9 s\u00fa najd\u00f4le\u017eitej\u0161ie pre overenie v\u00fdkonu os\u00ed CNC obr\u00e1bac\u00edch strojov. Zobrazi\u0165 technick\u00e9 \u0161pecifik\u00e1cie s\u00e9rie EP \u2192<\/a><\/div>\n<\/div>\n

<\/p>\n

\n

Chladiaca kvapalina a stupe\u0148 krytia IP \u2013 prisp\u00f4sobenie ochrany realite CNC<\/h2>\n

Rozhodnutie o triede krytia IP pre prevodovku s rota\u010dnou osou CNC nie je v\u0161eobecnou vo\u013ebou \u201evn\u00fatri stroja = IP54\u201c. Skuto\u010dn\u00e9 vystavenie chladiacej kvapaline z\u00e1vis\u00ed od polohy prevodovky vzh\u013eadom na dr\u00e1hu pr\u00fadenia chladiacej kvapaliny, od kon\u0161trukcie krytu stroja a od toho, \u010di je rota\u010dn\u00e1 os integrovan\u00e1 do stroja alebo pridan\u00e1 externe. Nespr\u00e1vna vo\u013eba stup\u0148a krytia IP vedie k poruche sp\u00f4sobenej kontamin\u00e1ciou op\u00edsanej v pr\u00edru\u010dke pr\u00ed\u010din por\u00fach \u2013 ktor\u00e1 sa v prostred\u00ed CNC zvy\u010dajne prejav\u00ed do 2 000 \u2013 4 000 hod\u00edn.<\/p>\n

\n
\n
\u2705 IP54 adekv\u00e1tne \u2014 EP-ZDE\/ZDF\/ZDWE\/ZDWF<\/div>\n