Ulwazi oluncinci malunga nezixhobo ezinqabileyo

Ithishu ye-abrasive yahlulahlulwe ngokweendidi ezintathu: eziqinileyo, eziphakathi kunye nezikhululekile.Udidi ngalunye lunokwahlulwa lube ngamanani, njl. njl., ahlulwe ngamanani ombutho.Inkulu inani lombutho weisixhobo abrasive, incinci ipesenti yevolumu ye-abrasive kwiisixhobo abrasive, kwaye i-gap ebanzi phakathi kwamasuntswana abrasive, okuthetha ukukhulula umbutho.Kwelinye icala, okukhona lisiba lincinane inani lentlangano, kokukhona liqina ngakumbi intlangano.Ama-abrasives anezicubu ezikhululekileyo akulula ukudlula xa esetyenziswa, kwaye avelise ukushisa okuncinci ngexesha lokugaya, oko kunokunciphisa ukuguqulwa kwe-thermal kunye nokutshisa i-workpiece.Iinkozo eziqhekezayo zesixhobo esiqhekezayo kunye nombutho oqinileyo akulula ukuwa, okunenzuzo ukugcina imilo yejometri yesixhobo se-abrasive.Umbutho wesixhobo sokuhlambalaza ulawulwa kuphela ngokuhambelana nefomula yesixhobo esiqhekezayo ngexesha lokwenziwa, kwaye ngokuqhelekileyo ayilinganiswanga.I-Superabrasive bonded abrasives yenziwe ikakhulu ngedayimane, i-cubic boron nitride, njl njl kwaye idibene ne-agent edibeneyo.Ngenxa yexabiso eliphezulu ledayimane kunye ne-cubic boron nitride kunye nokunganyangeki kakuhle, i-abrasives eboshiweyo eyenziwe kunye nayo iyahluke kwi-abrasive abrasive bonded abrasives.Ukongeza kwi-superhard abrasive layer, kukho iileyile zenguqu kunye ne-substrates.I-superabrasive layer yinxalenye edlala indima yokusika, kwaye iqulethwe ngama-superabrasives kunye ne-bonding agents.I-matrix idlala indima exhasayo ekusileni kwaye iqulethwe ngezinto ezifana nesinyithi, i-bakelite okanye i-ceramics.

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Kukho iinkqubo ezimbini zokwenziwa kwe-abrasives yentsimbi yebhondi, isinyithi somgubo kunye ne-electroplating, ezisetyenziselwa ubukhulu becala abrasives abrasive bonded abrasives.Indlela yokwenziwa komgubo wesinyithi isebenzisa ubhedu njengesibophelelo.Emva kokuxuba, kwenziwa ngokucinezela okutshisayo okanye ukucofa kwiqondo lokushisa, kwaye emva koko i-sintered.Indlela ye-electroplating isebenzisa i-nickel okanye i-nickel-cobalt alloy njengensimbi ye-electroplating, kwaye i-abrasive ihlanganiswe kwi-substrate ngokwenkqubo ye-electroplating yokwenza isixhobo esiqhekezayo.Iintlobo ezikhethekileyo ze-abrasives ziquka i-sintered corundum abrasives kunye ne-fiber abrasives.Isixhobo se-sintered corundum abrasive senziwa ngokuxuba, ukwenza, kunye ne-sintering malunga ne-1800 ℃ kunye ne-alumina ecocekileyo yomgubo kunye nenani elifanelekileyo le-chromium oxide.Olu hloboisixhobo abrasiveinesakhiwo esihlangeneyo kunye namandla aphezulu, kwaye isetyenziselwa ikakhulu ukucubungula iiwotshi, izixhobo kunye nezinye iindawo.Izixhobo ze-Fiber abrasive zenziwe nge-fiber filaments (ezifana ne-nylon filaments) eziqulethe okanye ezibambelela kwi-abrasives.Zine-elasticity entle kwaye zisetyenziselwa ukupholisha izinto zentsimbi kunye neemveliso zazo.

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Uluhlu lwenguqu lusetyenziselwa ukudibanisa i-matrix kunye ne-superabrasive layer, kwaye iqulethwe yi-agent edibeneyo, enokuthi ngamanye amaxesha ishiywe.Izibophelelo ezisetyenziswa ngokuqhelekileyo ziintlaka, isinyithi, isinyithi esinamacwecwe kunye neeseramikhi.
Inkqubo yokuvelisa i-abrasives edibeneyo ibandakanya: ukusabalalisa, ukuxuba, ukubunjwa, ukunyanga ukushisa, ukucubungula kunye nokuhlolwa.Ngezibophelelo ezahlukeneyo, inkqubo yokuvelisa nayo iyahluka.Ibhondi yeceramicisixhobo abrasive ikakhulu yamkela indlela yokucinezela.Emva kokulinganisa i-abrasive kunye ne-binder ngokomlinganiselo wobunzima befomyula, yibeke kwi-mixer ukuze udibanise ngokulinganayo, uyibeke kwi-mold yesinyithi, kwaye umise isixhobo esiqhekezayo singenanto kwi-press.Indawo engenanto iyomiswa ize emva koko ilayishwe kwi-onti ukuze yosiwe, kwaye ubushushu bokudubula bumalunga ne-1300 °C.Xa kusetyenziswa indawo ephantsi yokunyibilika i-sintered binder, iqondo lobushushu le-sintering lingaphantsi kwe-1000°C.Emva koko icutshungulwa ngokuchanekileyo ngokobukhulu obuchaziweyo kunye nemilo, kwaye ekugqibeleni imveliso ihlolwe.I-abrasives edibeneyo ye-resin yenziwa ngokubanzi kwi-press kwiqondo lokushisa legumbi, kwaye kukho neenkqubo zoxinzelelo ezishushu ezishushu kunye noxinzelelo phantsi kweemeko zokufudumeza.Emva kokubunjwa, iqiniswa kwiziko eliqinisayo.Xa i-phenolic resin isetyenziswa njenge-binder, ubushushu bokunyanga yi-180 ~ 200℃.I-abrasives edibeneyo ye-rubber ixutywe ngokukodwa kunye ne-roller, ifakwe kumaphepha amancinci, kwaye emva koko igxothwe ngeemela zokubhoboza.Emva kokubunjwa, ifakwe kwitanki ye-vulcanization kwiqondo lobushushu le-165 ~ 180 ℃.

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Ixesha lokuposa: Sep-05-2022