Ib qho ntawm cov khoom tseem ceeb ntawm cov abrasive yog nws cov hardness, uas yuav tsum nyuaj tshaj li cov khoom yuav tsum tau ua. Mohs hardness tester feem ntau yog siv los ntsuas qhov hardness ntawm ntau yam abrasives. Lwm yam khoom tseem ceeb ntawm abrasives yog toughness los yog bulk zog. Cov cuab yeej no tuaj yeem tswj tau los ntawm kev hloov pauv qhov sib xyaw, purity, particle loj thiab siv lead ua qauv ntawm cov khoom siv raw kom haum rau ntau yam kev siv.
Rau kev tsim cov khoom abrasive, tshwj tsis yog cov hmoov talc thiab hlau oxide, tag nrho cov ntaub ntawv raw yuav tsum tau crushed thiab tshuaj xyuas. Qhov ntsuas particle loj yuav tsum yog 4 txog 900, uas yog, ib txoj kab uas hla ntawm 6 millimeters (millimeters) mus rau 6 microns (txheej ntawm ib millimeters). ib) or finer. Kev sib tsoo lub log yog qhov tseem ceeb tshaj plaws abrasive khoom. Nws yog ua los ntawm abrasives thiab binders tov nyob rau hauv ib qho kev faib ua feem, molded thiab ces sintered. Thaum kawg, nws yuav tsum tau zoo li tus, sib npaug thiab overspeed xeem. Abrasive daim ntaub thiab cov ntawv xuab zeb yog lwm hom khoom abrasive nrog lub ntim ntau lawm. Lawv yog ua los ntawm cov khoom abrasive sib txuas nrog cov khoom siv hauv paus (daim ntaub lossis ntawv) thiab txiav rau hauv cov khoom sib txawv tom qab ziab. Lwm tus yog hmoov los yog granular abrasives. Tom qab kev tshuaj ntsuam, lawv yuav tsum tau ua qee yam txheej txheem, xws li abrasives rau kev sib tsoo lossis polishing. Mineral ointment los yog siv quav ciab thiab lwm yam khoom siv pab cuam feem ntau yog ntxiv kom haum rau cov kev xav tau ntawm kev ua haujlwm sib txawv.
Cov yam ntxwv ntawm Abrasives thiab Application Areas ntawm Abrasives
Abrasives yog dav siv nyob rau hauv kev lag luam, tshwj xeeb tshaj yog thaum ua high-precision los yog tsawg-roughness qhov chaw los yog tshwj xeeb tshaj yog nyuaj qhov chaw, abrasives thiab abrasive cov cuab yeej yog indispensable. Tsis tas li ntawd, kev sib tsoo lub log kuj tseem yog cov cuab yeej tseem ceeb rau cov cuab yeej ntse thiab txiav cov ntaub ntawv nyuaj. Hauv kev lag luam tsheb tsim, kev sib raug zoo ntawm piston rings thiab lub tog raj kheej, li qub thiab lub rooj zaum valve, thiab qhov tseeb ntawm kev sib kis thiab lub zog yuav tsum tau ua tiav nrog cov khoom siv abrasives thiab cov cuab yeej abrasive los xyuas kom meej. Lwm yam khoom tshiab muaj feem xyuam, xws li xov xwm rau cov yas sib txuas rau cov menyuam grinders, txuag lub sijhawm thiab ua kom cov khoom tsim tau zoo rau kev deburring ntau qhov chaw.
Kev tsim technology ntawm abrasives tau ua kom muaj kev vam meej. Kev ua tau zoo ntawm pob zeb diamond sib tsoo log tau nce plaub zaug piv nrog 14 xyoo dhau los; tag nrho cov nqi ntawm zirconia-alumina sib tsoo log siv nyob rau hauv steel dov mills tsuas yog 25% ntawm qhov ntawd xyoo 1948, thiab qhov ceev tau nce xya zaug. Qhov teeb meem tam sim no yog qhov kev xav ntawm kev sib tsoo tseem ceeb tseem tsis tau meej thiab yuav tsum tau kawm; cov specifications ntawm cov khoom yog complex thiab varied, thiab tsis yooj yim rau simplify.
