4 cov kauj ruam tseem ceeb los kov yeej cov khoom tsis xws luag

Yuav ua li cas" tsis muaj tseeb" txhais tau tiag tiag?

Ib qho teeb meem tseem ceeb tshwm sim thaum kev kos duab engineering hais" Tsis muaj qhov tsis xws luag"," tsis muaj residues"," tsis muaj roj, roj thiab cov khoom" ;," tsis muaj crumbs"," tsis muaj khawb" los yog lwm yam qhia tau hais tias ib qho khoom siv defect tsis tuaj yeem lees txais. Cov duab kos feem ntau cim nrog cov yam ntxwv xws li" tsis muaj kab kos"," tsis muaj" thiab" tsis muaj longitudinal tuag kab".

Qhov teeb meem nrog cov kev thov no yog, thaum koj saib ntawm qhov chaw, qhov no txhais tau li cas?

Yog tias koj ua tib zoo saib ntawm txhua qhov chaw, koj yuav pom qhov tsis xws luag. (Puas tau saib koj cov tawv nqaij hauv daim iav tsis tu ncua, tom qab ntawd saib koj cov tawv nqaij hauv 10x lub iav tsom iav?

Qhov sib txawv ntawm qib micro

Los ntawm qhov pom ntawm microscopic, qhov saum npoo yuav muaj cov kab uas tsis pom ntawm 10x magnification, tab sis zoo li cov kwj ha loj thaum kuaj xyuas hauv qab 50x magnification. Qhov saum npoo ntawm lub raj txiav yuav zoo ib yam ntawm 10 x magnification, tab sis qhov tsis xws luag hauv kev npaj cov nplej yuav raug nthuav tawm siv scanning electron microscopy (SEM) ntawm 500 x magnification.

Ntawm qhov kev nthuav dav heev, yuav luag txhua yam khoom muaj teeb meem saum npoo. Txawm li cas los xij, thaum qhov chaw yuav tsum yog" tsis muaj qhov tsis zoo", cov duab kos feem ntau tsis qhia meej tias yuav tsum ua tib zoo saib xyuas qhov chaw ntawm ib feem yuav tsum tau soj ntsuam los yog, qhov tseem ceeb tshaj, yuav ua tib zoo saib xyuas los ntawm tus neeg siv khoom.

Yog li, yuav ua li cas kov yeej qhov teeb meem ntawm cov khoom siv defects? Siv plaub kauj ruam no!

1. Txiav txim siab magnification

Txhawm rau kom ntseeg tau tias cov khoom raug tshuaj xyuas mus rau theem tsim nyog ntawm kev nthuav dav, nws yog ib qho tseem ceeb los txiav txim siab qhov loj ntawm cov khoom nto uas yuav tsum tau kuaj xyuas. Magnification yog qhov piv ntawm ib yam khoom' qhov loj me me (lossis nws qhov loj me hauv ib daim duab) thiab nws qhov loj me, qhia raws li 5x, 10x, 20x, 50x, thiab lwm yam.

Los ntawm kev qhia qhov kev nthuav dav ntawm daim duab, koj thiab koj tus neeg muag khoom yuav tau txais qib pom zoo uas tuaj yeem siv los ntsuas seb cov khoom siv' qhov chaw raws li koj xav tau.

Tab sis dab tsi yuav tsum tau txiav txim siab thaum qhia qhov loj?

Thaum xaiv cov qib magnification, nws tseem ceeb heev uas nws muaj txiaj ntsig rau kev siv kawg. Txij li kev soj ntsuam ze dua ntxiv rau tus nqi, koj yuav tsum xyuas kom meej tias koj tsis dhau ntawm cov cav tov thiab yuav tsum tau ua kom tiav qhov chaw tshaj qhov koj xav tau, uas yuav dhau koj cov peev nyiaj.

Piv txwv li, nws yuav dhau mus xyuas qhov ntawm 100 magnification yog tias me ntsis grooves hauv cov yeeb nkab lossis pas nrig tsis cuam tshuam rau qhov ua tau zoo ntawm qhov. Txawm li cas los xij, yog tias koj tab tom tsim cov pob bearings uas yuav siv rau hauv cov khoom siv dav hlau tseem ceeb, cov qib siab loj yuav tsum tau ua kom muaj kev ua haujlwm thiab ua tau raws li qhov yuav tsum tau muaj kev nyab xeeb.

Xav txog lub kaum sab xis ntawm lub teeb ci

Nco ntsoov tias lub kaum sab xis ntawm lub teeb ci tseem cuam tshuam rau qhov pom ntawm cov khoom nto ntawm qib microscopic.

Lub kaum sab xis ntawm lub teeb tuaj yeem ua rau cov duab ntxoov ntxoo thiab qhov cuam tshuam uas tuaj yeem nce lossis txo qhov pom qhov loj ntawm cov kab kos, kab nrib pleb, grooves, dents, thiab lwm yam tsis xws luag. Lub kaum sab xis kuj tuaj yeem hloov pauv qhov tsos lossis zais qhov muaj qhov tsis muaj xim.

Lub teeb microscopes tuaj yeem tso siab rau ntau yam teeb pom kev zoo, xws li cov teeb ci ncig, kos cov fiber ntau optics, cov kav dej fluorescent, thiab txawm tias cov teeb rov qab - txhua yam uas cuam tshuam cov duab ntxoov ntxoo sib txawv.

3. txheeb xyuas qhov kub thiab txias ntawm lub teeb

Lwm qhov sib txawv yog xim kub ntawm lub teeb, uas yog ib txoj hauv kev zoo dua los saib ntawm lub teeb pom kev zoo dua li tsuas yog txheeb xyuas seb lub tshuab tsom iav siv LED, fluorescent lossis incandescent teeb pom kev zoo.

Cov cuab yeej ntawm lub teeb pom kev no yog sawv cev los ntawm kelvin (K). Qhov kub siab tshaj 5,000 K yog hu ua xim txias (xiav-dawb) thiab qis qis (2,700-3,000 K) yog hu ua xim sov (daj-dawb mus rau liab).

Qhov sib txawv ntawm cov xim kub yuav cuam tshuam cov tsos ntawm qhov chaw ntawm qhov chaw. Qhov no tuaj yeem ua rau muaj kev tsis sib haum xeeb hauv:

Yuav ua li cas ob tug neeg yuav saib ib feem ntawm qhov sib txawv, yuav ua li cas lawv pom thiab piav qhia txog cov khoom nto

Hauv ib daim duab lossis yees duab sib koom, qhov tshwm sim ntawm qhov chaw uas nws lub hom phiaj yog kom paub meej tias qhov" yuav tsum saib"

Xav txog qhov pom ntawm qhov kaj

Txawm li cas los xij, lwm qhov sib txawv los xav txog yog tias tsis muaj teeb pom kev zoo - lossis, tshwj xeeb tshaj yog, tsis muaj teeb pom kev zoo li hauv SEM.

Txhua microscopy suav nrog saib cov khoom thiab / lossis thaj chaw ntawm lawv qhov chaw uas tsis pom ntawm qhov muag liab qab. Lub teeb microscopes siv diffraction, reflection, lossis refraction ntawm cov teeb pom kev zoo los tsim cov duab.

Txawm li cas los xij, SEM tshuaj xyuas ib qho piv txwv los ntawm kev tshuaj xyuas nws nrog lub teeb pom kev zoo electron uas tau cuam tshuam los ntawm cov qauv' s topography los tsim cov duab peb sab ntawm cov khoom thiab / lossis nto. Hauv lwm lo lus, rau tib neeg lub qhov muag, SEM saib qhov chaw hauv qhov tsaus ntuj tag nrho!

Qhov no txhais tau tias tsis muaj kev cuam tshuam duab ntxoov ntxoo.

Puas yog SEM haum rau koj daim ntawv thov?

Vim hais tias lub wavelength ntawm electrons tsawg dua li qhov pom lub teeb, SEM muaj peev xwm tsim tau ntau yam nthuav dav ntawm qhov kev daws teeb meem ntau dua li qhov uas tsim los ntawm lub tshuab ntsuas qhov muag. Tsis tas li ntawd, SEM muaj qhov tob focal loj dua thiab yog li nthuav dav 3D duab.

Txawm li cas los xij, SEM muaj qhov tsis zoo, suav nrog cov khoom siv hluav taws xob, lub lens thiab cov qauv yuav tsum tag nrho hauv lub tshuab nqus tsev. SEM kuj tseem kim heev, nyuaj thiab nyuaj rau siv rau kev siv niaj hnub.

Tsis tas li ntawd, vim tias SEM yog qhov sib txawv ntawm cov txheej txheem microscopy zoo tib yam, SEM tsis tuaj yeem muab piv nrog qhov muag pom uas siv ntau txoj kev siv lub teeb pom kev zoo. Yog li, thaum theem kev nthuav dav tsim los ntawm SEM yog qhov xav tsis thoob, nws tsis sib haum nrog cov peev txheej hauv lub Hoobkas lossis khw.

Qhov no txhais tau hais tias yuav tsum tau SEM qib" tsis muaj qhov tsis zoo" yog unrealistic, tsawg kawg rau tam sim no.

Kev xav txog tam sim no yuav pab ua kom zoo tom qab

Qhov xov xwm zoo yog tias koj tuaj yeem ua tau thiab yuav tsum tau qhia meej cov qib magnification rau ib feem ntawm qhov chaw siv ntau txoj hauv kev siv tshuab microscopy.

Ordinary light microscopes tuaj yeem ntsuas qhov twg los ntawm 5x txog 50x, thiab muaj lwm yam kev xaiv ntau dua. Piv txwv li, Metal Cut Corporation muaj lub tshuab ntsuas qhov muag uas muaj peev xwm nthuav dav txog li 200 zaug, thiab peb cov cuab yeej tshuaj ntsuam video tuaj yeem tso saib cov ntsiab lus ntau dua.

Qhov tseem ceeb tshaj plaws, xav txog cov khoom siv, kev nthuav dav thiab seb lawv cuam tshuam li cas rau kev siv thaum ntxov ntawm cov txheej txheem tsim khoom - piv txwv li, thaum koj kos duab lossis ua tiav RFQS. Qhov no tsis tsuas yog pab koj kom tsis txhob muaj teeb meem, tab sis kuj pab xyuas kom meej tias koj cov khoom dhau los soj ntsuam thiab ua tau raws li koj cov kev xav tau.

Thov hu rau peb ntawm zhang@pride-cnc.com