Ma electrode amphamvu kwambiri a graphite, posintha maelekitirodi amkuwa ndi ma elekitirodi a graphite popanga nkhungu, amafupikitsa kwambiri kuzungulira kwa nkhungu, kukulitsa zokolola za anthu ogwira ntchito, ndikuchepetsa mtengo wopangira nkhungu. M'zaka zaposachedwa, poyambitsa nkhungu zolondola komanso zogwira mtima kwambiri (zokhala zifupikitsa zozungulira), zomwe anthu amafuna pakupanga nkhungu zakwera kwambiri. Chifukwa cha malire osiyanasiyana a maelekitirodi amkuwa okha, Iwo akulephera kukwaniritsa zofunikira za chitukuko cha nkhungu. Graphite, monga EDM electrode material, yakhala ikugwiritsidwa ntchito kwambiri mumakampani a nkhungu chifukwa cha ubwino wake monga machinability apamwamba, kulemera kwake, kupanga mofulumira, kutsika kochepa kwambiri, kutayika kochepa komanso kuvala kosavuta. Ndizosapeweka kuti idzalowa m'malo mwa electrode yamkuwa.
1. Makhalidwe a Graphite Electrode Materials
CNC Machining imakhala ndi liwiro la kukonza mwachangu, makina apamwamba komanso kuvala kosavuta. Liwiro la makina a graphite ndi 3 mpaka 5 kuposa la maelekitirodi amkuwa, ndipo liwiro lokonzekera bwino ndilopambana kwambiri. Komanso, mphamvu zake ndizokwera kwambiri. Kwa ma elekitirodi apamwamba kwambiri (50 mpaka 90mm) ndi owonda kwambiri (0.2 mpaka 0.5mm), samakonda kupunduka pokonza. Komanso, nthawi zambiri, mankhwala amafunika kukhala ndi mawonekedwe abwino kwambiri. Izi zimafuna kuti popanga maelekitirodi, azipangidwa ngati maelekitirodi achimuna ofunikira momwe angathere. Komabe, pali njira zingapo zobisika zamakona panthawi yopanga ma elekitirodi achimuna. Chifukwa chosavuta kudula katundu wa graphite, vutoli likhoza kuthetsedwa mosavuta ndipo chiwerengero cha electrode chikhoza kuchepetsedwa kwambiri, chomwe ma electrode amkuwa sangathe kukwaniritsa.
2. Kupanga kwa EDM yofulumira, kuwonjezereka kwazing'ono kutentha ndi kutayika kochepa: Chifukwa cha kayendedwe kabwino ka magetsi ka graphite kuposa mkuwa, kutulutsa kwake kumathamanga kwambiri kuposa mkuwa, kukhala 3 mpaka 5 nthawi zamkuwa. Kuphatikiza apo, imatha kupirira kuchuluka kwamagetsi pakutulutsa, komwe kumakhala kopindulitsa kwambiri pakutulutsa koyipa kwamagetsi. Panthawiyi, pansi pa voliyumu yomweyi, kulemera kwa graphite ndi 1/5 nthawi zamkuwa, zomwe zimachepetsa kwambiri EDM. Ili ndi zabwino zambiri popanga maelekitirodi akulu ndi ma elekitirodi achimuna ofunikira. Kutentha kwa sublimation kwa graphite ndi 4200 ℃, yomwe ndi 3 mpaka 4 nthawi zamkuwa (kutentha kwa sublimation yamkuwa ndi 1100 ℃). Pa kutentha kwambiri, kusintha
Ma electrode apamwamba kwambiri a graphite
Ndilochepa kwambiri mumpangidwe (1/3 mpaka 1/5 yamkuwa pansi pamagetsi omwewo) ndipo simafewetsa. Mphamvu yotulutsa imatha kusamutsidwa ku workpiece mogwira mtima komanso osagwiritsa ntchito pang'ono. Chifukwa mphamvu ya graphite imawonjezeka pa kutentha kwambiri, imatha kuchepetsa kutayika (kutayika kwa graphite ndi 1/4 ya mkuwa), kuonetsetsa kuti ntchitoyo ikuyenda bwino.
3. Kulemera kochepa komanso mtengo wotsika mtengo: Pakupanga mtengo wamagulu a nkhungu, nthawi ya CNC Machining, nthawi ya EDM, ndi kuvala kwa electrode ya electrode account chifukwa cha kuchuluka kwa ndalama zonse, ndipo zonsezi zimatsimikiziridwa ndi electrode material yokha. Poyerekeza ndi mkuwa, liwiro la makina ndi EDM liwiro la graphite ndi 3 mpaka 5 nthawi zamkuwa. Pakadali pano, mawonekedwe a kuvala kochepa komanso kupanga ma elekitirodi ofunikira a graphite amatha kuchepetsa kuchuluka kwa maelekitirodi, potero kuchepetsa kugwiritsa ntchito zinthu komanso nthawi yopangira ma elekitirodi. Zonsezi zimatha kuchepetsa kwambiri mtengo wopangira nkhungu
2. Zofunikira ndi Makhalidwe a Makina ndi Magetsi a Graphite Electrodes
1. Kupanga maelekitirodi: Akatswiri opanga ma elekitirodi a graphite amagwiritsa ntchito zida zamakina othamanga kwambiri pokonza. Zida zamakina ziyenera kukhala zokhazikika bwino, zokhala ndi mayendedwe ofananirako komanso okhazikika amizere itatu popanda kugwedezeka. Komanso, kulondola kozungulira kwa zigawo monga shaft yayikulu kuyeneranso kukhala kwabwino momwe kungathekere. Elekitirodi imatha kukonzedwanso pazida zamakina wamba, koma njira yolembera njira yachidayi ndiyosiyana ndi ma elekitirodi amkuwa.
2.EDM magetsi otulutsa magetsi opangira ma graphite electrodes ndi carbon electrodes. Chifukwa graphite ili ndi mphamvu yabwino yamagetsi, imatha kusunga nthawi yochuluka mu makina opangira magetsi, chomwe ndi chimodzi mwa zifukwa zomwe graphite imagwiritsidwa ntchito ngati electrode.
3. Kukonza Makhalidwe a Graphite Electrodes: Ma graphite a mafakitale ndi olimba komanso osasunthika, omwe amachititsa kuti zida ziwonongeke kwambiri panthawi ya CNC Machining. Nthawi zambiri, tikulimbikitsidwa kugwiritsa ntchito zida zokutidwa ndi aloyi yolimba kapena diamondi. Pamene akhakula Machining graphite, chida akhoza mwachindunji anaika pa workpiece. Komabe, pomaliza kukonza, kuti mupewe kung'ambika ndi kusweka, chida chopepuka komanso njira yodutsa mwachangu nthawi zambiri imagwiritsidwa ntchito.
Nthawi zambiri, ma graphite samasweka ngati kuya kwake kuli kochepera 0.2mm, ndipo mawonekedwe apamwamba a khoma lakumbali amathanso kupezeka. Fumbi kwaiye CNC Machining wa maelekitirodi graphite ndi lalikulu ndipo mwina adzaukira njanji kalozera, zomangira kutsogolera ndi spindles chida makina, etc. Izi zimafuna kuti graphite processing makina chida ali ndi zipangizo lolingana pothana ndi graphite fumbi, ndi makina chida kusindikiza ntchito ayeneranso kukhala zabwino chifukwa graphite ndi poizoni. Graphite ufa ndi chinthu chomwe chimakhudzidwa kwambiri ndi machitidwe amankhwala. Resistivity yake imasintha m'malo osiyanasiyana, kutanthauza kuti kukana kwake kumasiyanasiyana. Komabe, pali chinthu chimodzi chokhazikika: ufa wa graphite ndi chimodzi mwazinthu zabwino kwambiri zopanda zitsulo zopangira zitsulo. Malingana ngati ufa wa graphite ukusungidwa mu chinthu chotetezera popanda kusokoneza, ngati ulusi wochepa thupi, udzakhalabe ndi magetsi. Koma mtengo wotsutsa ndi wotani? Palibe chiwerengero chotsimikizika cha mtengo uwu, chifukwa ubwino wa ufa wa graphite umasiyanasiyana, ndipo kukana kwa ufa wa graphite wogwiritsidwa ntchito muzinthu zosiyanasiyana ndi malo kudzakhalanso kosiyana.
Simungadziwe kuti ufa wapamwamba wa graphite ulinso ndi ntchito zoyendetsera:
Nthawi zambiri, mphira ndi insulating. Ngati conductivity yamagetsi ikufunika, zinthu zopangira magetsi ziyenera kuwonjezeredwa. Graphite ufa uli ndi magetsi abwino kwambiri komanso mafuta opangira mafuta. Graphite imasinthidwa kukhala ufa wa graphite, womwe uli ndi mafuta abwino kwambiri komanso ochititsa chidwi. Kukwera kwa chiyero cha ufa wa graphite, kumapangitsa kuti ntchito yake ikhale yabwino. Mafakitole ambiri apadera a mphira amafunikira mphira wothandizira. Ndiye, kodi ufa wa graphite ungawonjezedwe ku mphira kuti uziyendetsa magetsi? Yankho ndi inde, koma palinso funso: Kodi graphite ufa mu rabala ndi chiyani? Mabizinesi ena amagwiritsa ntchito gawo losapitilira 30%, lomwe limagwiritsidwa ntchito pazinthu za raba zosamva kuvala monga matayala agalimoto, ndi zina zambiri. Palinso mafakitale apadera a labala omwe amagwiritsa ntchito gawo la 100%. Zoterezi zokha zimatha kuyendetsa magetsi. Mfundo yaikulu ya conductivity ndi yakuti woyendetsa sangathe kusokonezedwa, monga waya. Ngati yasokonezedwa pakati, sichikhala ndi magetsi. The conductive graphite ufa mu mphira conductive ndi kondakitala Ngati graphite ufa watsekedwa ndi mphira insulating, sipadzakhalanso magetsi. Choncho, ngati chiwerengero cha graphite ufa ndi otsika kwambiri, zotsatira conductive mwina osauka.
Graphite ufa ndi chinthu chomwe chimakhudzidwa kwambiri ndi machitidwe amankhwala. Resistivity yake imasintha m'malo osiyanasiyana, kutanthauza kuti kukana kwake kumasiyanasiyana. Komabe, pali chinthu chimodzi chokhazikika: ufa wapamwamba wa graphite ndi imodzi mwazinthu zabwino kwambiri zopanda zitsulo zopangira zitsulo. Malingana ngati ufa wa graphite ukusungidwa mu chinthu chotetezera popanda kusokoneza, ngati ulusi wochepa thupi, udzakhalabe ndi magetsi. Koma mtengo wotsutsa ndi wotani? Palibe chiwerengero chotsimikizika cha mtengo uwu, chifukwa ubwino wa ufa wa graphite umasiyanasiyana, ndipo kukana kwa ufa wa graphite wogwiritsidwa ntchito muzinthu zosiyanasiyana ndi malo kudzakhalanso kosiyana.
Nthawi yotumiza: May-09-2025