Masind loso injin
video

Masind loso injin

Masinde mag loso CNC itiyogo ahinya mar loso buche ma iye mag silinda mag haidrolik kod gik mamoko mag loso paip. Bang’ loso gik moko, inyalo yudo ng’eyo ma malo kendo ma nigi ng’eyo ma malo (ma chopo dwaro mag loso kod rito silinda mag pi). Gino mag masinno oting'o ahinya ringruok mar otanda, sistem mar spindle, ng'injo mar servo, ng'injo mar servo, sistem mar stima, masin mar kweyo kendo ng'ado, sistem mar keto mo, um mar rito, gik ma iketo, gige loso, kod mamoko. Beam mar masin mar loso CNC itiyogo e kar loso pi, kar loso injin, kar loso ndege, kod
Chiwo penjo
mokuongo

Masind loso CNC mar kit SWH nigi gedo mar aksis achiel kod kar tich achiel
Kido makende mar gige tich mag masin en kaka luwogi:

 

Loso kod Loso Gik Motudore gi Gige Masinde mag Honing

 

1. Loso kod loso gige tich mag masin onego oluw chike mag ISO, IEC mag piny mangima kod chike ma owinjore.
2. Gik moko duto ma itiyogo e masin kod gik mopogore opogore onego oti kod yo ma piny mangima tiyogo mar pim.
3. Gige masin ma itiyogo nigi gige keto mo ma opong’o kod gik ma itiyogo e ng’ado pi, kendo gik madongo ma wuotho ​​nigi gige keto mo.
4. Gik madongo ma masinde tiyogo olosi gi gik ma nigi rang’iny mamalo, kendo gik ma oyier mag masin, mag pi, mag stima, kod mag elektronik gin gik ma nigi nying’ ma nigi rang’iny ma malo kendo ma nyalo geno.

 

image002

Pichni mag gige tich (gik ma adier nyalo bedo gi pogruok moko)

 

Paramita madongo mag teknolojia

 

1

Tiyo gi rang'iny mar aperch

milimita 560

2

Kido maduong'

Kilo 5000

3

Bor maduong' mar bore

milimita 8000

4

Rang' mar keto gikmoko

milimita 50-milimita 620

5

Tiyo gi masin makare

H6-H8 (chuma ma kawaida)

6

Rach mar lowo

Ra0.1-Ra0.4 (chuma ma kawaida)

7

Teko mar masin mar spindle

5.5Kw

8

Spind mar ng'wech

17rpm-180rpm (lokruok mar ng'wech maonge okang')

9

Teko mar masin ma dwokore

4.5Kw

10

Spido mar duoko

0-40m/dakika

11

Yore mag geng'o tuo mar strok

Motor mar servo + rel mar tayo

12

Keto strok kama kare

milimita 0.1

13

Teko mar motor mar pala

1Kw

14

Mode mar rito ng’ado wich

Motoka mar savo + rak mar gia

15

Luoro makare mar ng’ado wich

milimita 0.001

16

Sistem mar keto gikmoko

Keto gi lwedo gi masin

17

Sistem mar golo

masin mar golo pi ma nigi magnet

18

Sistem mar rito

Sistem mar rito loso

19

Dwok kwan mar ng'wech mar pamp mar mo

Lita 50/dakika

20

Kilo mar masin

Maromo tan 5

21

Bor x lach x bor (mm)

约19020*950*1650

22

Okang' mar koko

desibel matin moloyo 90

23

Rieko mar masin

Gima rito

24

Masinde dwaro presa mar yamo

0.5Mpa

25

Teko maduong' mar masin

20Kw

26

Seche mag loso

maduong': 650 sentimita3/saa

 

Mokwongo Mar Gedo Maduong' Kod Gik Motigo E Masinde

 

SWH -8000 masin mar loso gik moko itiyogo ahinya e loso gik moko ma iye ma iye mag silinda mag pi kod gik mamoko ma itiyogo e loso pi. Bang’ loso, inyalo yudi adier mar geometry ma nigi rang’iny mamalo kod mesh matin mar lowo (ma chopo dwaro mag loso kod rito silinda mag haidrolik))


Gigo ma itiyogo e masinni nigi ringruok mar otanda, sistem mar spindle, gigo ma dwoko servo, gigo ma chiwo chiemo, sistem mar stima, gigo ma kelo koyo kod filta, sistem mar keto mo, oumo mar rito, gik ma iketo, gige loso gik moko, kod mamoko

 

Frem mar otanda

 

Oboke mar masinni olosi gi chuma ma olosi kendo okalo e ng’ado ng’wech mang’eny mondo ogol pek ma ng’ato nigo, ma miyo ng’ato bedo gi adier ni ng’ato ogolo pek ma ng’ato nigo. Otimre ka otiyo gi masin maduong’ mar loso gik moko kendo otieko e tich achiel mar keto gik moko e lwetgi. Gino mag masin nigi teko mamalo kendo nigi nyalo maber ahinya mar keto gik moko e kama gikmoko nitie. Kendo onyalo neno ni masinno bedo motegno kuom kinde malach kendo tiyo maber ahinya.

 

Sistem mar ng'injo

 

Bok mar spindle en gino maduong’ ahinya e gige tich mag masinni, ma gier duto nigi rang’iny mar 6 kendo bering duto ma ikelo gin bering ma nigi ng’eyo ma malo, ma miyo ng’ato bedo gi ng’wech maduong’, ng’wech ma malo mar ng’ado mtoka, kendo ng’ado mtoka ma ok ng’ich ahinya. E kinde marom, gik moko duto osetim maber kokalo kuom ng’iyo teko mar gik ma nigi giko kod ng’iyo kaka kompyuta tiyo, ma nyiso ni ng’ato nyalo geno ahinya. Bok mar spindle olosi ahinya ne masinde mag loso buche madongo, ma nyalo chopo loso teko ma ok lokre mar gik ma iketo e paip e kind rang’iny mar masinde. Gima ng’ado mar boksi mar ng’ado plate nyalo golo sanduku mar ng’ado kod gige ng’ado ng’ado mayot e bur ma olosi bang’ ng’ado ng’ado ng’wech achiel, konyo e ng’iyo kendo pim bur, konyo e loko kite mag mo kod gik ma itiyogo, keto wich mar ng’ado e chal maber, kendo geng’o ng’ado ng’ado. E kinde marom, kuom gimoro achiel ma itiyogo, onyalo neno ni paramita mag chakruok kod giko mar strok odong’ ma ok olokore. Ka ng’ato otimo tich maluwo, onge dwaro mar keto paramita kendo, ma miyo tich bedo maber.
 

image003

 

Sistem mar dwoko

 

Sistem mar dwoko gik moko nigi masin ma dwoko gik moko, boksi mar giya ma dwoko piny, boksi mag sproket ma tiyo kod ma ok tiyo, kod ng’injo mag rola. Teko mar ng’ado mtoka en 4.5KW, ng’wech mar mtoka en mita 0-40 e dakika achiel, kendo ng’wech mar mtoka nyalo lokore. Sistemno nigi ng’eyo ma dwokore mar 0.1mm. Ne oloso ng’injo mar ng’injo kapok owuok e kambi, kendo bang’ tiyo kuom thuolo moro, dwarore ni otimne nonro kinde ka kinde kuom loko nut mar M30 ma ni e ng’injo mar ng’injo mar ng’injo .

 

Sistem mar medo wich ma ng’injo

 

Olosi gi masin mar servo, gino maduoko piny gik ma winjore, ng’wech mar piny ma lak achiel, tudruok, kod mamoko. Sistem mar chudo mar kidi ma owuon, ma nigi ler mar chiemo mar 0.001mm, neno ni pimo mag masin ochung’ motegno

 

Sistem mar Chiwo

 

Sistem mar rito en sistem mar rito ma Liruite oloso owuon, ma nigi skrin ma mulo rangi 15 ma nyalo konyo dhano - masin. Gik moko duto mag stima gin gik ma ong’ere maber ma nigi rang’iny mar arita mar IP65 kata ma malo, tiyo maber, kendo oket gik ma nyalo konyo e donjo kod wuok, gik ma mulo skrin ma mulo, nyiso dhok mathoth, ma itiyogo mar keto paramita mag loso, luwo loso, kod tije mag loso gi lwedo; Nyis e yoo motegno chal mar yor loso, kendo iket gik ma itiyogo kaka ng’wech mar wich mar loso, ng’wech mar strok ma dwokore, kar strok ma dwokore, ng’wech mar chiemo, kod ng’wech mar chiemo e skrin ma mulo. Tiyo gi lwedo, luwo masin, kod nyiso alarm mar ketho mag wuoth mopogore opogore mag masin mar honing bende inyalo tim. Alarm mar ketho inyiso e skrin ma mulo alarm mar ketho, ma nyalo ng’eyo mapiyo kama ketho nitie kokalo kuom nyiso ketho kod nyiso weche ma ondik. Sistemno nigi tich mar loko gik moko gi lwedo kod giwegi. Sistemno nigi tich mar loso gik ma ng’ato nyalo timo mondo one ni ng’ato ka ng’ato ng’iyo gik ma ng’ato tiyogo.

 

image005

 

image007

(HMI)

Gima kelo koyo kendo golo pi

 

Gino oting’o sistem mar keto mo, sistem mar ng’ado mo ma nigi magnet, kod mamoko. Switzerland TURBO sistem mar ng’ado ng’ato nyalo yier, kendo masin mar ng’ado tepi mar otas inyalo yier kaluwore gi chal mar ng’ado gik ma ok nigi magnet kod masin mar ng’ado mo mondo orit tich mar ng’ado mo ma ng’ato ng’ado. Chenro makende mar chiwo gikmoko luwore gi listi mar gige tich mar aboro

 

image009

 

Klamp

 

Gima iketo makende, rang'iny mar gik ma iketo manyalo lokore, yo mar keto kod golo gikmoko gi lwedo. Gik ma itiyogo e loso gik moko nyalo geno, yot lokogi, kendo keto gik moko e iye kod gologi yot kendo mapiyo. <2Zepa> Rang’ mar ng’ado gik moko inyalo loso, ka itiyo gi giko mar milimita 50 nyaka milimita 620. Gik ma itiyogo gi yamo ma tiyo gi yamo kod gik ma itiyogo e keto gikmoko kendo golo gikmoko inyalo keto e yo ma ok owinjore, kendo inyalo loso lain mar loso gikmoko kaluwore gi dwaro mar jonyiewo. Okang’ makende mar chiwo gik moko luwore gi list mar gige tich ma ni e sula mar aboro.

image013
image011

image015

(Gik ma tiyo gi yamo owuon)

 

Gigo makende mar loso

 

Ka itiyo gi rack mar giya ma opogore opogore ma riembo wich mar chiemo, ber mar loso gikmoko ni malo kendo nyalo geno, nyalo mar loso gikmoko ni malo, adier mar chiemo nyalo geng’ore, tichno yot kendo yot, kendo gi sistem mar chudo mar kidi ma otomatik, nyalo ma malo kendo nyalo bedo maber

 

3A504F2E7CAD792328FA7C9B55BA1033

(Omiyo wich)

Tije mag masin

 

1. HMI: Data mar masin ma inyiso e skrin ma mulo inch 15 oriwo ng’wech mar ng’wech, ng’wech mar ng’wech, ng’wech mar chiemo, ng’wech mar dwoko, kar dwoko, paramita ma inyalo loko ma ok ochung’, kod sistem mar alarm mondo kik otimre marach .
2. Sistem mar chiemo: Sistem mar chudo mar kidi ma owuon (kido matin mogik mar chiemo: 0.001mm), ka itiyo gi masin mar servo + dwoko piny mar harmonic, riembo mar chiemo, chudo mar kidi ma orwako, onge dwaro mar loko gi lwedo
3. Sistem mar kweyo: golo otomatik kendo kweyo kokalo kuom sistem mar golo
4. Bok mar rito gige tich mag masin nigi baton mag tiyo gi masin kaka chung’ mapiyo, wuotho ​​ma dwokore, medo chiemo kod dwoko piny, kod mamoko
5. Kido mar shield: Oboke mar arita ma oum nus nigi arita kendo nyalo geno, yot tiyogo, keto kendo golo gik ma itiyogo, kendo pim pek
6. Rangi mar masin: buru makwar+rachar kaka chak
7. Sistem mar rito gik moko nigi tich mar loso gik moko owuon, ma nyalo loso gik moko e yo makare kokalo kuom sistem mar rito gik moko, kendo inyalo yiero mode mar tiyo gi lwedo.
8. Sistemno nigi tich mar keto paramita mag loso gik moko kendo obiro gi kar keno mar loso gik moko
9. Gino ma itiyogo e masin nigi tich mar loso gik moko kokalo kuom buche kod buche ma ok nen maber
10. Masinde mag tich nigi tich mar paro weche
11. Masinde ma itiyogo nigi tije ma opong’o mag tiyo gi lwedo kod ma tiyo gi lwedo owuon, kendo onyalo tiyo ka ng’ato ka ng’ato gi lwedo e mode mar tiyo gi lwedo.
12. Gino mag masin nigi tich mar strok machuok kendo weyo tich mar loso strok moro amora mabor
13. Gigo nigi tije kaka geng’o mapiyo, alarm mar wuotho ​​mokalo kiewo, alarm mar ng’ado mtoka mokalo kiewo, kod mamoko
14. Gigo nigi gino ma nyiso ni en gi ketho
15. Gima itiyogo en kaka gimoro ma itiyogo gi lwedo, ma ting’o kendo dwoko piny gik ma itiyogo gi lwedo .
16. Yor loko gik mitiyogo kod gige tich: lokogi gi lwedo
17. Yore mag keto kod golo gikmoko: keto gikmoko kendo golo gikmoko gi lwedo

 

Dwaro mar loso

 

Gik ma itiyogo e masin itiyogo ahinya e loso silinda mag mo kod gik mamoko ma itiyogo e loso paip ma nigi buche madongo kendo ma nigi stroke mabor, kendo bende inyalo tiyogo mar loso buche ma iye ma ng’ato nyalo ng’adogo silinda. Bang’ loso, inyalo yudi kido mag geometry ma nigi rang’iny mamalo kod kido mag mesh matin mag wi lowo, ma chopo dwaro mag tiyo kodgi

 

Listi maduong' mar chenro

 

Ooyo.

Kit gimoro

Wach

Nying

1

Gima duoko piny spindl

SWH-01

LRT

2

Motor mar spindle

5.5KW

Taiwang Dongsheng

3

Derepe mar Motor mar Spindl

 

Schnaida

4

Motor mar chiemo

1KW

Schnaida

5

Chiemo dereva mar mtoka

 

Schnaida

6

Motor ma dwokore

4.5KW

Schnaida

7

Dereva mar Motor ma dwokore

 

Schnaida

8

Sistem mar rito gik moko

QW-2 Sistem mochiwre

LRT

9

Mulo skrin duto-e -achiel

inch 15

KunLun

10

Kaka ng'ato chung' kata wuotho

NSK

NSK Japan

11

Riwruok

 

Itali

12

Konekta mar ndege/gimoro mar stima

 

Schnaida

13

Gik madongo mag masin

19M/6T

LRT

14

Gige loso

milimita 50 nyaka 560

LRT

15

Gik ma iketo

Kido mar V: milimita 50-620

LRT

16

Sistem mar golo

golo mar adek

Osimbo ma malo - mar piny

17

Gikmoko mamoko

Rail mag tayo, gigo mag yamo, kod mamoko.

Osimbo ma malo - mar piny

 

Listi mar gige tich kod kwan mar pesa

 

Ooyo.

Kit gimoro

Mod

Rang' mar loso (mm)

Wich

KWAN.

U/P(RMB)

U/P($)

1

Masinde mag loso

SWH-8000

 

chano

1

   

2

Adapta

202

 

chano

1

   

3

Giya mar riembo

HB-50

 

chano

1

   

4

Jama oting'o

MPS-1050

50-63

chano

1

   

5

Jama oting'o

MPS-1060

60-76

chano

1

   

6

Giya mar riembo

HB-76

 

chano

1

   

7

Jama oting'o

MH-76

76-97

chano

1

   

8

Giya mar riembo

HB-97

 

chano

1

   

9

Jama oting'o

MH-97

97-125

chano

1

   

10

Jama oting'o

MH-125

125-150

chano

1

   

11

Jama oting'o

MH-150

150-195

chano

1

   

12

Giya mar riembo

HB-195

 

chano

1

   

13

Jama oting'o

MHC-195

195-260

chano

1

   

14

Jama oting'o

MHC-260

260-340

chano

1

   

15

Jama oting'o

MHC-340

340-450

chano

1

   

16

Giya mar riembo

HB-450

 

chano

1

   

17

Jama oting'o

MHC-450

450-560

chano

1

   

18

Gik ma iketo

Kido mar V/manyalo

50-400

chano

1

   

19

Gik ma iketo

\\ / kido/manyalo

400-620

chano

1

   

20

Shaft mar loso

SMG-3000

Φ42,L=6m

PC

1

   

21

Shaft mar loso

ZMG-3000

Φ60,L=8.7m

PC

1

   

22

Shaft mar loso

DMG-3000

Φ89,L=8.7m

PC

1

   

23

Sistem mar golo mo

golo mar adek

500L

chano

1

   

24

Masin mar filyo tep mar otas

Oloso kaka idwaro

/owinjore

5-20um

chano

1

   

25

Gino mayom mar mo

Oloso kaka idwaro

/owinjore

Digri 0-30

chano

1

   

DUTO

   

WECHE:

 

gigo ma itiyogo

 

OOYO.

NYING

Mod

Wich

KWAN.

NOTES

1

Skru mar mako wich mar soket mar heksagon

M5X25

PC

16

 

2

Skru mar mako wich mar soket mar heksagon

M5X20

PC

16

 

3

Uso ma achiel kachiel

φ5X28

PC

10

 

4

Lewni mag emeri

120#

sit

8

 

5

Lewni mag emeri

240#

sit

8

 

6

Lewni mag emeri

400#

sit

5

 

7

Uso ma achiel kachiel

φ5X12

PC

10

 

8

Uso ma achiel kachiel

φ5X32

PC

10

 

9

Kidi mar loso

H70


chano

10

 

10

Kidi mar loso

H70


chano

10

 

11

Set mar rang'iny mar heksagonal

Wich mar Bal Set Ma Omedore mar Kidieny Abung’wen


chano

1

 

12

Kido mar Allen

12MM oting'o wich mar opira

PC

1

 

13

Rach mar kidi mar mo

E7618

PC

1

 

14

Skru mar soket ma nigi wich ma oluor

M6X8

PC

10

 
 

 

Listi mar gik ma nyalo hinyre kod gik ma nyalo tiyo

 

OOYO.

Nying

Mod

BRand

KWAN.

NOTES

1

Gige loso

 

LIRUTI

chano

 

2

Kidi mar loso

H50

LIRUTI

PC

 

3

Kidi mar loso

H70

LIRUTI

chano

 

4

Draiva mar harmonic

XB-2

LIRUTI

chano

 

5

Mo mar loso

CMD-30-55

LIRUTI

barel

200L

6

Riwruok mar kardan

 

LIRUTI

PC

 

7

Uso ma achiel kachiel

mm

LIRUTI

PC

 

 

Data mar teknoloji kod gik moko

 

1. Kopi achiel mar buk mar masin
2. Oboke achiel mar luwo chike
3. Kad achiel mar waranti
4. Kopi achiel mar listi mar gik ma idwaro
5. Ripot achiel mar nono kar loso
6. Kido ariyo mag tiyo kod masin
7. Kido ariyo mag kabat mar rito stima

 

Keto kod tiyo kod gige tich mag masin

 

1. Keto fundament: Dier simenti ma ng’ich, ma nigi ketho mar bor ma ok okalo 2cm kuom mita achiel kendo ketho duto ma ok okalo 4mm
2. Chiwo teko: 380V ± 10% 50HZ 20KVA (inyalo loko kaluwore gi chal)
3. Kido mar liet: digri 10 - digri 40
5. Ng’ich mar piny: Matin moloyo kata marom gi 65%

 

Yie gige tich mag masin, ketogi, kod puonj mar tiyo kodgi

 

1. Gima oyiego: Gima itiyogo e kind rang’iny mar masin ma ochiw gi Party A biro bedo gima oyiego.


2. Yore mag yie: Yore mag yie biro luwore gi winjruok mar teknoloji ma jogo ariyo noseketo lwetgi.


3. Yie motelo (jonyiewo nyalo yiero ka be gibiro timo yie motelo kaluwore gi gik matimore)
Kapok oyie gi gimoro, itimo gi ng’at ma oloso gige tich, kendo ng’at ma tiyo kod gige tich chiwo gik ma 2 ma onego otimgo tes mondo oyienegi kapok oyie. Gik ma itiyogo e ng’ado ng’injo gin gik ma ng’at ma loso gik moko ema chiwo, kendo gige pim kaka gige pim kod mita mag ng’injo bende iloso. Jogo ariyo duto biro timo gik moko 2 maluwore kaluwore gi dwaro mar ng’eyo adier mar gik ma itiyogo e temo ma ondikie lwedo mondo oyie gi gige tich. Bang’ ka ng’ato oseyie, jogo ariyo duto biro keto lwetgi e dakika ma pok oyienegi, kendo pesa ma ibiro tiyogo kapok oyienegi, kaka pesa mag wuotho ​​kod pesa mag tero sampuli mag Jokanyo A, ibiro chulo gi Jokanyo A.


4. Yie mogik
Yie mogik ibiro tim gi ng’at ma tiyo kod gige tich, ma biro chiwo gik ma itiyogo e timo tem, gige pim, gige tich, kod jotich ma owinjore mondo oyiene; Ng’at ma tiyo kod gige tich biro chiwo gik adek mag temo, achiel mar loso gik ma ok odhi kare kendo ariyo mar yie. Bang’ ka osetieko loso gik ma itiyogo e masin, jogo ariyo duto biro timo gik moko adek maluwore kaluwore gi dwaro mag loso gik moko ma ng’ato ka ng’ato onego otim mondo oyud yie mogik mar gik ma itiyogo. Bang’ kalo e nonro mar yie, jogo ariyo duto biro keto lwetgi e ripot mogik mar yie.


5. Keto gige tich
Bang' ka gige tich osechopo e kambi, ng'at ma tiyo gi gige tich nigi ting' mar golo gige tich mag masin, keto kod keto gige tich mag masin itimo gi ng'at ma loso gige tich e kama ng'at ma tiyo gi gige tich nitie, kendo gige tich mowinjore kod kuonde ma itiyogo e keto (kaka ting'o gige tich, kod mamoko gin gige tich.


6. Ponji mar tiyo
E kinde ma ibiro yie gi gige tich, ng’at ma loso gige tich biro chiwo puonj mar tiyo kod gige tich kuom ndalo ma ok okalo adek mag tich. Gik ma puonjno puonjo gin kaka ng’eyo gik mopogore opogore ma itiyogo e masin, ng’eyo maber masin ma itiyogo, kaka masinno tiyo, tiyo kod masin ma itiyogo e ng’ado masin, ng’iyo kendo rito masinno pile ka pile, kod loso gik ma nyalo kelo pek e masinno. Namba mar jogo ma ibiro puonjo ok onego okal 3, kendo e kinde ma ibiro puonjore, pesa ma jogo ma ibiro puonjo biro tiyogo biro ng’iewo giwegi.

 

bang'-uso tich

 

<2Zepa> Kinde mar waranti mar gige tich en higa achiel, chakre chieng’ ma ji ariyogo duto oyiegogi mogik kendo keto lwetgi e ripot mar yiegi.


<2Zepa> Tich e kinde mar waranti: E kinde mar waranti, Oganda B nigi ting’ kod ting’ mar chiwo tich mar rito gik ma ok gin gik ma dhano timo ne jogo ma tiyo kode, kendo chiwo gik ma nyalo loko gik moko ma onge chudo ne gik ma okethore Ka kethono okel gi ketho ma dhano otimo kata ka dwaro mar ng’at ma tiyo kode ok bi chulo, mopogore opogore. E kinde ma waranti nitie, ka nitie gimoro marach e gige tich kata gik ma iketo, japur biro chiwo duoko kod puonj ei seche 8 bang’ yudo simu kowuok kuom ng’at ma tiyo kode. Jotich ma rito gik moko biro chopo kama iketoe gik moko ei seche 48. Jonyiewo ma ni e pinje ma oko nyaka keto lwetgi e chik mopogore opogore mag waranti kod bang’-uso gi jonyiewo.


Bang’ ka osekalo kinde mar waranti, ng’at ma oloso masinno biro dhi nyime gi miyo jogo ma tiyo gi masinno tich mar rito masinno kuom ngimagi duto kendo chudo nengo mag gik moko kod pesa mag rito masinno kaluwore gi kaka jalonyno noketo chudo.

 

Nods mag Hoot: masin mar loso injin, jo China maloso masinde mag loso injin

Chiwo penjo

Dala

Simo

E-mail

Penjo