Kugadziriswa kwegraphite kunogona kuve bhizinesi rine hunyengeri, saka kuisa dzimwe nyaya pekutanga kwakakosha pakubudirira uye pundutso.
Chokwadi chakaratidza kuti graphite inonetsa muchina, kunyanya kune EDM electrodes inoda yakanakisa kunyatsojeka uye kusimba kwemaitiro.Heano mapoinzi mashanu akakosha ekurangarira kana uchishandisa graphite:
Graphite mamakisi zvakaoma kusiyanisa, asi imwe neimwe ine yakasarudzika yemuviri zvimiro uye kuita.Graphite mamakisi akapatsanurwa muzvikamu zvitanhatu zvichienderana neavhareji particle size, asi matatu chete madiki madiki (particle size ye 10 microns kana pasi) anowanzoshandiswa mumazuva ano EDM.Chiyero muchikamu chiratidzo chezvinogona kushandiswa uye kushanda.
Zvinoenderana nechinyorwa chakaitwa naDoug Garda (Toyo Tanso, uyo akanyorera kudhindwa kwehanzvadzi yedu "MoldMaking Technology" panguva iyoyo, asi zvino yava SGL Carbon), mamakisi ane saizi yemhando ye8 kusvika kugumi mamicron anoshandiswa kuita roughing.Zvishoma kupedzisa uye zvakadzama mashandisirwo anoshandisa mamakisi e5 kusvika 8 micron particle size.Maelectrodes akagadzirwa kubva kumagiredhi aya anowanzo shandiswa kugadzira mold uye kufa-casting mold, kana kune isinganyanyi kuomesesa poda uye sintered metal applications.
Yakanaka dhizaini dhizaini uye idiki, yakanyanya kuomarara maficha ari akakodzera kune particle saizi kubva pa3 kusvika ku5 microns.Electrode applications in this range inosanganisira kucheka waya uye aerospace.
Ultra-fine precision maelectrodes anoshandisa graphite mamakisi ane particle size ye1 kusvika 3 microns anowanzodiwa kune yakakosha aerospace metal uye carbide application.
Pakunyora chinyorwa cheMMT, Jerry Mercer wePoco Materials akacherekedza saizi yechikamu, simba rekukotama, uye kuoma kweShore sezvitatu zvakakosha zvinotaridza kuita panguva yekugadziriswa kwemagetsi.Zvisinei, iyo microstructure ye graphite inowanzova iyo inogadzirisa mukushanda kwe electrode panguva yekupedzisira EDM kushanda.
Mune chimwe chinyorwa cheMMT, Mercer akataura kuti simba rekukotama rinofanira kunge rakakwira kupfuura 13,000 psi kuona kuti graphite inogona kugadziriswa kuita mbabvu dzakadzika uye dzakatetepa pasina kutyoka.Maitiro ekugadzira magraphite electrode akareba uye angangoda akadzama, akaoma-ku-muchina maficha, saka kuve nechokwadi chekusimba seizvi kunobatsira kuderedza mari.
Kuoma kwemahombekombe kunoyera kushanda kwemagiredhi emagiredhi.Mercer anoyambira kuti mamakisi egraphite akapfava zvakanyanya anogona kuvhara maturusi emidziyo, kunonotsa mashandiro emuchina kana kuzadza maburi neguruva, zvichizoisa kumanikidza pamadziro egomba.Muzviitiko izvi, kudzikisa chikafu nekumhanyisa kunogona kudzivirira kukanganisa, asi kuchawedzera nguva yekugadzirisa.Panguva yekugadzira, iyo yakaoma, diki-grained graphite inogonawo kuita kuti zvinhu zviri pamucheto wegomba zviputse.Zvishandiso izvi zvinogona zvakare kuve zvakanyanya abrasive kune chishandiso, zvichitungamira kupfeka, izvo zvinokanganisa kutendeka kwegomba dhayamita uye inowedzera mari yebasa.Kazhinji, kudzivirira kutsauka pahukukutu hwepamusoro, zvinodikanwa kudzikisira chikafu chekugadzirisa uye nekumhanyisa kwenzvimbo yega yega nekuoma kweShore kwakakwira kupfuura 80 ne1%.
Nekuda kwenzira iyo EDM inogadzira mufananidzo wegirazi we electrode muchikamu chakagadziriswa, Mercer akataurawo kuti yakasimba yakazara, yunifomu microstructure yakakosha kune graphite electrodes.Miganhu isina kuenzana inowedzera porosity, nekudaro ichiwedzera kukukurwa kwechikamu uye kukurumidza kutadza kwe electrode.Munguva yekutanga electrode machining process, iyo isina kuenzana microstructure inogona zvakare kutungamira kune isina kuenzana kupera kwepamusoro-dambudziko iri rakatonyanya kukomba pane yakakwirira-kumhanya machining nzvimbo.Mavara akaoma mugirafu anogonawo kukonzera kuti chishandiso chitendeuke, zvichiita kuti electrode yekupedzisira ive isina kutsanangurwa.Uku kutsauka kunogona kuve kudiki zvakakwana zvekuti gomba re oblique rinoonekwa rakananga panopindwa.
Kune akasarudzika magirafu ekugadzira michina.Kunyangwe michina iyi ichizokurumidzisa kugadzirwa, handiyo chete michina inogona kushandiswa nevagadziri.Pamusoro pekudzora guruva (zvinotsanangurwa gare gare muchinyorwa), zvakapfuura MMS zvinyorwa zvakashumawo mabhenefiti emichina ine kukurumidza spindles uye kutonga ine yakakwirira yekumhanyisa kumhanya kwekugadzira magirafu.Nenzira yakanaka, kukurumidza kutonga kunofanirawo kuva nekutarisa kumberi, uye vashandisi vanofanira kushandisa chishandiso nzira optimization software.
Pakuisa ma graphite electrodes — ndiko kuti, kuzadza pores egraphite microstructure ne micron-sized particles — Garda anokurudzira kushandiswa kwemhangura nekuti inogona kugadzika kugadzira alloys chaiyo yemhangura neye nickel, seaya anoshandiswa mumhepo.Mhangura yakamisikidzwa graphite mamakisi anoburitsa akakwenenzverwa kupera pane asina-impregnated mamakisi echikamu chimwe chete.Ivo vanogona zvakare kuwana yakagadzikana kugadzirisa kana vachishanda pasi pemamiriro akashata akadai sekushaikwa kwekutsvaira kana vasina ruzivo vanoshanda.
Maererano nechinyorwa chechitatu cheMercer, kunyange zvazvo synthetic graphite-rudzi rwakashandiswa kugadzira EDM electrodes-ine biologically inert uye saka pakutanga isingakuvadzi vanhu pane zvimwe zvinhu, mhepo isina kunaka inogona kukonzera matambudziko.Synthetic graphite inoitisa, izvo zvinogona kukonzera mamwe matambudziko kumudziyo, izvo zvinogona kupfupika-kutenderera kana zvasangana nekunze conductive zvinhu.Mukuwedzera, magirafu akaiswa nezvinhu zvakadai semhangura uye tungsten inoda kutarisirwa kwakawedzerwa.
Mercer akatsanangura kuti ziso remunhu harigone kuona guruva regraphite muzvikamu zvidiki, asi rinogona kukonzera kutsamwa, kubvaruka uye kutsvuka.Kusangana neguruva kunogona kuve kunopisa uye kushungurudza zvishoma, asi hazvibviri kubatwa.Ivhareji yenguva-yeyero (TWA) yekuratidza girafu guruva mumaawa e8 ndeye 10 mg / m3, iyo inotaridzika inotaridzika uye haizombofi yakaonekwa muhurongwa hwekuunganidza guruva hunoshandiswa.
Kunyanya kutarisana neguruva re graphite kwenguva yakareba kunogona kukonzera girafu yakafemerwa kuti igare mumapapu uye bronchi.Izvi zvinogona kutungamirira kuchirwere chisingaperi chepneumoconiosis chinonzi graphite chirwere.Graphitization inowanzoenderana neyechisikigo graphite, asi muzviitiko zvisingawanzo inoenderana neyakagadzirwa graphite.
Guruva rinoungana panzvimbo yebasa rinopisa zvikuru, uye (muchikamu chechina) Mercer anoti rinogona kuputika mune mamwe mamiriro ezvinhu.Kana kupisa kukasangana nekusangana kwakakwana kwezvimedu zvakanaka zvakamiswa mumhepo, moto weguruva uye deflagration zvichaitika.Kana guruva rakaparadzirwa muhuwandu kana huri munzvimbo yakavharwa, inowanzoputika.Kudzora chero mhando yechinhu chine njodzi (mafuta, okisijeni, kupisa, kupararira kana kurambidzwa) kunogona kuderedza zvakanyanya mukana wekuputika kweguruva.Kazhinji, indasitiri inotarisa pamafuta nekubvisa huruva kubva kunobva kuburikidza nemhepo, asi zvitoro zvinofanirwa kufunga nezvese zvinhu kuti zviwane kuchengetedzwa kwakanyanya.Midziyo yekudzora guruva inofanirawo kunge iine maburi-ekudzivirira kuputika kana masisitimu anodzivirira kuputika, kana kuiswa munzvimbo isina oxygen.
Mercer yakaona nzira mbiri huru dzekudzora guruva regraphite: masisitimu emhepo anomhanyisa ane vaunganidzi veguruva-izvo zvinogona kugadziriswa kana kutakurika zvichienderana nekushandiswa-uye masisitimu emvura anozadza nzvimbo yakatenderedza mucheki nemvura.
Zvitoro zvinoita zvishoma zvekugadzira graphite zvinogona kushandisa mudziyo unotakurika une high-efficiency particulate air (HEPA) sefa inogona kufamba pakati pemichina.Nekudaro, maworkshops anogadzira huwandu hwakawanda hwegraphite anowanzo shandisa yakagadziriswa system.Kumhanya kwemhepo kudiki kunotora guruva mafiti 500 paminiti, uye kukurumidza kweponji kunowedzera kusvika kumafiti 2000 pasekondi.
Wet masisitimu anomhanyisa njodzi yemvura "wicking" (kunyudzwa) mumagetsi emagetsi kuti abvise huruva.Kukundikana kubvisa mvura isati yaisa electrode muEDM kunogona kukonzera kusvibiswa kwemafuta edielectric.Vashandi vanofanira kushandisa mvura-based solutions nokuti idzi mhinduro hadzina kunyanya kubatwa nemafuta pane zvinogadziriswa nemafuta.Kuomesa electrode usati washandisa EDM kunowanzobatanidza kuisa zvinhu muvheni ye convection kweinenge awa pane tembiricha zvishoma pamusoro peiyo evaporation point yemhinduro.Iyo tembiricha haifanirwe kudarika 400 madhigirii, sezvo izvi zvichange zvichizowedzera oxidize uye corrode zvinhu.Vashandi havafaniriwo kushandisa mhepo yakamanikidzwa kuomesa electrode, nokuti mweya wemhepo unongomanikidza mvura yakadzika mukati mekugadzirwa kwe electrode.
Princeton Tool inotarisira kuwedzera chigadzirwa chayo portfolio, kuwedzera pesvedzero yayo kuWest Coast, uye kuve mupi akasimba akazara.Kuti zvizadzise zvinangwa zvitatu izvi panguva imwe chete, kutorwa kweimwe chitoro chekugadzira michina kwakava sarudzo yakanaka.
Waya EDM mudziyo unotenderedza waya ye electrode inotungamirwa yakatwasuka muCNC-inodzorwa E axis, ichipa musangano weworkpiece clearance uye kuchinjika kuburitsa yakaoma uye yakakwirira-chaiyo PCD zvishandiso.
Nguva yekutumira: Sep-26-2021