Cov ntaub so ntswg abrasive yog kwv yees muab faib ua peb pawg: nruj, nruab nrab thiab xoob.Txhua pawg tuaj yeem muab faib ua lej, thiab lwm yam, uas txawv ntawm cov koom haum cov lej.Qhov loj dua lub koom haum naj npawb ntawm covabrasive cuab yeej, qhov me me qhov ntim feem pua ntawm cov abrasive nyob rau hauvabrasive cuab yeej, thiab qhov dav ntawm qhov sib txawv ntawm cov khoom abrasive, uas txhais tau hais tias lub koom haum looser.Piv txwv li, lub koom haum me me, lub koom haum nruj dua.Abrasives nrog cov ntaub so ntswg tsis yooj yim rau passivate thaum siv, thiab ua kom muaj cua sov tsawg dua thaum sib tsoo, uas tuaj yeem txo cov thermal deformation thiab hlawv ntawm workpiece.Cov nplej abrasive ntawm cov cuab yeej abrasive nrog lub koom haum nruj tsis yooj yim kom poob tawm, uas yog qhov zoo los tswj cov duab geometric ntawm cov cuab yeej abrasive.Lub koom haum ntawm cov cuab yeej abrasive tsuas yog tswj raws li cov khoom siv abrasive thaum lub sijhawm tsim khoom, thiab feem ntau tsis ntsuas.Superabrasive bonded abrasives feem ntau yog ua los ntawm pob zeb diamond, cubic boron nitride, thiab lwm yam.Vim yog tus nqi siab ntawm pob zeb diamond thiab cubic boron nitride thiab hnav tsis kam, cov khoom sib txuas ua ke nrog lawv sib txawv ntawm cov khoom sib tsoo zoo sib xws.Ntxiv nrog rau cov txheej txheem superhard abrasive, muaj cov txheej txheem hloov pauv thiab substrates.Cov txheej txheem superabrasive yog ib feem uas ua lub luag haujlwm txiav, thiab yog tsim los ntawm superabrasives thiab cov khoom sib txuas.Lub matrix plays lub luag haujlwm txhawb kev sib tsoo thiab muaj cov khoom siv xws li hlau, bakelite lossis ceramics.
Muaj ob txoj kev tsim khoom rau hlau abrasives, hmoov metallurgy thiab electroplating, uas yog siv rau superhard abrasive bonded abrasives.Cov hmoov metallurgy txoj kev siv bronze ua tus khi.Tom qab sib tov, nws yog tsim los ntawm kub nias los yog nias ntawm chav tsev kub, thiab ces sintered.Cov txheej txheem electroplating siv nickel lossis nickel-cobalt alloy ua cov hlau electroplating, thiab cov abrasive yog sib sau ua ke ntawm cov substrate raws li cov txheej txheem electroplating los ua cov cuab yeej abrasive.Ntau yam tshwj xeeb ntawm abrasives suav nrog sintered corundum abrasives thiab fiber ntau abrasives.Cov cuab yeej sintered corundum abrasive yog tsim los ntawm kev sib xyaw, sib sau, thiab sintering ntawm li 1800 ℃ nrog alumina hmoov hmoov thiab ib qho tsim nyog ntawm chromium oxide.Hom noabrasive cuab yeejmuaj cov qauv compact thiab siab zog, thiab yog siv los ua cov moos, cov twj paj nruag thiab lwm qhov chaw.Fiber abrasive cov cuab yeej yog ua los ntawm fiber ntau filaments (xws li nylon filaments) uas muaj los yog ua raws li abrasives.Lawv muaj elasticity zoo thiab feem ntau yog siv rau polishing hlau cov ntaub ntawv thiab lawv cov khoom.
Cov txheej txheem hloov pauv yog siv los txuas cov matrix thiab cov txheej txheem superabrasive, thiab yog tsim los ntawm kev sib koom ua ke, uas qee zaum tuaj yeem raug tshem tawm.Feem ntau siv binders yog resins, hlau, plated hlau thiab ceramics.
Kev tsim cov txheej txheem ntawm kev sib raug zoo abrasives suav nrog: kev faib tawm, sib xyaw, sib sau, kho cua sov, ua haujlwm thiab tshuaj xyuas.Nrog cov binders sib txawv, cov txheej txheem tsim khoom kuj txawv.Ceramic bondabrasive cuab yeej feem ntau yog siv txoj kev nias.Tom qab qhov hnyav ntawm cov abrasive thiab cov binder raws li qhov hnyav piv ntawm cov mis, muab tso rau hauv lub tov khoom kom sib tov sib npaug, muab tso rau hauv cov pwm hlau, thiab ua cov cuab yeej abrasive dawb paug ntawm cov xovxwm.Cov khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob.Thaum siv cov sintered binder tsawg, qhov kub ntawm sintering yog qis dua 1000 ° C.Tom qab ntawd nws yog ua tiav raws li qhov loj me thiab cov duab, thiab thaum kawg cov khoom raug tshuaj xyuas.Resin-bonded abrasives feem ntau yog tsim los ntawm cov xovxwm ntawm chav tsev kub, thiab tseem muaj cov txheej txheem kub-nias uas tau rhuab thiab pressurized nyob rau hauv cov cua kub.Tom qab molding, nws yog hardened nyob rau hauv ib tug hardening rauv.Thaum phenolic resin siv los ua binder, qhov kub thiab txias yog 180 ~ 200 ℃.Rubber-bonded abrasives feem ntau yog sib xyaw nrog cov chais, dov rau hauv cov ntawv nyias, thiab tom qab ntawd xuas nrig ntaus nrog rab riam.Tom qab molding, nws yog vulcanized nyob rau hauv lub vulcanization tank ntawm qhov kub ntawm 165 ~ 180 ℃.
Post lub sij hawm: Sep-05-2022
