Kev Tshawb Fawb Txog Kev Cuam Tshuam ntawm Brown Fused Alumina Micropowder rau Cov Khoom Siv Nto Roughness
Hauv peb txoj haujlwm, tshwj xeeb tshaj yog hauv kev kho qhov chaw lossis kev ua cov ntaub ntawv, peb cuam tshuam nrog qhov qhia txog "roughness" yuav luag txhua hnub. Nws zoo li "ntiv tes" ntawm cov khoom siv, txiav txim siab ncaj qha seb cov txheej tom ntej puas tuaj yeem lo rau, cov khoom tiv taus kev hnav li cas, thiab txawm tias qhov cuam tshuam ntawm kev sib dhos. Niaj hnub no, cia peb tsis txhob tham txog cov kev xav siab ntawd, tab sis zaum thiab tham zoo li cov npoj yaig txog peb tus phooj ywg qub uas paub zoo tshaj plaws - xim av fused alumina micropowder - thiab nws "tswj" qhov roughness ntawm cov ntaub ntawv li cas.
I. Ua ntej, cia peb nkag siab: Dab tsi yog xim av fused alumina micropowder?
Xim av fused alumina, hais yooj yim xwb, yog yam peb "ua kom zoo" siv cov ntaub ntawv xws li alumina thiab coke hauv lub cub hluav taws xob arc. Vim tias nws muaj qee cov titanium thiab hlau oxides, nws muaj xim av, yog li ntawd lub npe. Nws muaj qhov nyuaj siab, zoo toughness, thiab pheej yig, ua rau nws yog "mainstay" hauv sandblasting thiab sib tsoo.
Thiab lo lus "micropowder" yog qhov tseem ceeb. Nws hais txog cov hmoov zoo heev uas tau los ntawm kev zom thiab sieving xim av fused alumina los ntawm cov txheej txheem tshwj xeeb, nrog rau qhov loj me ntawm cov khoom me me feem ntau yog los ntawm ntau pua txog ntau txhiab meshes. Tsis txhob saib tsis taus cov hmoov no; nws tsis yog ib rab riam "txiav ntoo" uas ntxhib, tab sis yog ib rab riam "sculpting" uas raug. Nws qhov tshwm sim tau tso cai rau xim av fused alumina txav mus los ntawm cov haujlwm hnyav xws li tshem tawm cov nplai oxide tuab los ntawm kev castings mus rau thaj chaw ntawm kev ua haujlwm raug, qhov twg xav tau qhov zoo ntawm qhov chaw siab heev.
II. Nws "Sculpting" qhov saum npoo li cas? - Lub Ntiaj Teb Dynamic Microscopic
Muaj ntau tus neeg xav tias kev siv xuab zeb tsuas yog ntaus rau saum npoo nrog xuab zeb xwb, thiab qhov nyuaj koj ntaus, qhov ntxhib nws yuav ua rau. Qhov ntawd yog ib nrab tseeb, tab sis rau cov neeg uas kawm txog cov hmoov me me, ib nrab ntxiv yog qhov tseem ceeb. Qhov cuam tshuam ntawm cov hmoov av alumina xim av fused rau qhov ntxhib ntawm qhov chaw yog ib qho txheej txheem nyuaj, uas kuv sau ua peb qhov cuam tshuam tseem ceeb:
"Kev Khawb" Cov Nyhuv (Macro-Cutting): Qhov no yog qhov yooj yim tshaj plaws. Cov hmoov me me uas ya ceev heev, zoo li ntau lub rauj me me thiab cov chisels, cuam tshuam rau qhov chaw ntawm cov khoom. Cov khoom tawv dua yuav ncaj qha "tom" ntawm cov khoom, tsim cov qhov me me. Theem no yog tus tsav tsheb tseem ceeb ntawm kev nce sai ntawm qhov roughness ntawm qhov chaw. Xav txog ib qho chaw du uas raug khawb tawm nrog ntau lub qhov me me; qhov sib txawv ntawm cov ncov thiab hav dej nce ntxiv dramatically, ntuj tsa cov nqi roughness (piv txwv li, Ra, Rz).
Qhov cuam tshuam ntawm "Plowing" (plastic deformation): Qhov no yog qhov nthuav. Thaum cov khoom me me tsis cuam tshuam rau saum npoo ntawm lub taub hau, tab sis "scrape" nws hla ntawm lub kaum sab xis, lawv yuav tsis txiav ncaj qha los ntawm cov khoom. Hloov chaw, zoo li plowing, lawv "nias" cov khoom ntawm qhov chaw mus rau sab, tsim ib qho "groove." Cov txheej txheem no tsis tshem tawm cov khoom ncaj qha, tab sis los ntawm kev hloov pauv yas, nws hloov pauv qhov morphology ntawm qhov chaw, ua rau muaj qhov sib txawv ntawm cov ncov thiab cov hav.
Cov teebmeem "Kev sib zog" thiab "kev qaug zog": Nyob rau hauv qhov kev cuam tshuam tas mus li ntawm cov khoom me me, qhov chaw ntawm cov khoom siv yuav dhau los ntawm cov txheej txheem ntawm "kev ua kom zoo" los ntawm kev cuam tshuam ntau zaus. Kev cuam tshuam thaum ntxov yuav ua rau qhov chaw xoob, tab sis kev cuam tshuam tas mus li yeej "kev sib zog" ntawm cov txheej saum npoo, tsim cov txheej tuab, muaj zog. Tib lub sijhawm, kev cuam tshuam ntau zaus ua rau qaug zog hauv cov qauv ntawm qhov chaw ntawm cov khoom siv, ua rau nws yooj yim dua rau cov khoom me me tom qab kom tshem tawm.
Raws li koj tuaj yeem pom, txawm tias yog cov txheej txheem xuab zeb yooj yim muaj peb qhov cuam tshuam tib lub sijhawm thiab cuam tshuam nrog ib leeg hauv ntiaj teb me me: "khawb," "plowing," thiab "tamping."
III. Peb Yam Tseem Ceeb Uas Cuam Tshuam Rau Cov Txiaj Ntsig: Qhov Loj ntawm Cov Khoom Me Me, Qhov Siab, thiab Lub Kaum
Tam sim no peb nkag siab txog lub hauv paus ntsiab lus, peb yuav ua li cas "txib" tusxim av fused alumina micropowderkom ua tiav qhov roughness ntawm qhov chaw uas xav tau thaum ua haujlwm tiag tiag? Nws feem ntau yog nyob ntawm peb yam tseem ceeb no:
Yam Ua Ntej: Qhov Loj ntawm Cov Khoom Me Me (Cov hmoov yuav tsum ntxhib npaum li cas?)
Qhov no yog qhov tseem ceeb tshaj plaws. Hais yooj yim xwb, nyob rau hauv tib qho xwm txheej, qhov coarser cov khoom me me, qhov ntau dua qhov roughness ntawm qhov chaw. Siv 80-mesh coarse hmoov yuav tsim ib qho chaw ntxhib heev hauv ob peb strokes; tab sis yog tias koj siv W40 lossis txawm tias finer micropowder, qhov chaw tshwm sim yuav du heev thiab muaj qhov xav zoo. Qhov no zoo ib yam li sanding ntoo nrog coarse sandpaper piv rau zoo sandpaper - cov txiaj ntsig yog sib txawv heev. Yog li ntawd, kom tau txais qhov roughness ntawm qhov chaw qis, xaiv zoo micropowder yog thawj kauj ruam.
Lub ntsiab lus tseem ceeb thib ob: Lub zog tsuag (Muaj zog npaum li cas?)
Kev nias yog lub zog uas muab rau cov khoom me me. Qhov siab dua, qhov nrawm dua cov khoom me me ya, qhov muaj zog kinetic ntau dua, thiab qhov "khawb" thiab "plowing" ua rau muaj kev ntxhib ntau dua, ua rau muaj kev ntxhib ntau dua. Txawm li cas los xij, muaj qhov tsis zoo: kev nias siab dua tsis zoo dua tas li. Kev nias ntau dhau tuaj yeem ua rau txiav ntau dhau, txawm tias ua rau puas tsuaj rau qhov tseeb ntawm cov khoom ua haujlwm, lossis txawm tias tawg cov khoom tawg. Peb qhov kev paub yog tias, thaum ua tau raws li qhov yuav tsum tau ntxuav thiab kev ntxhib, nws yog qhov zoo tshaj plaws los siv qhov siab qis tshaj plaws - "siv cov hlau zoo tshaj plaws qhov twg nws suav."
Lub ntsiab lus tseem ceeb thib peb: Lub kaum sab xis ntawm cov tshuaj tsuag (Los ntawm qhov twg?)
Muaj ntau tus neeg tsis quav ntsej txog qhov no. Kev tshawb fawb qhia tau tias thaum lub kaum sab xis ntawm cov tshuaj tsuag yog nyob nruab nrab ntawm 70 ° thiab 90 ° (yuav luag perpendicular), qhov nce ntawm qhov roughness yog qhov tseem ceeb tshaj plaws vim tias qhov "khawb" effect dominates. Thaum lub kaum sab xis me dua (piv txwv li, 30 ° -45 °), qhov "plowing" effect yuav pom tseeb dua, ua rau muaj qhov roughness profile sib txawv. Yog tias peb xav ntxuav ib qho chaw tab sis tsis xav kom nws ntxhib dhau, qee zaum peb siv lub kaum sab xis me dua los ua kom muaj kev sib npaug ntawm kev ntxuav thiab roughness.
IV. Cov "Zaj Dab Neeg" thiab Kev Xav Txog Hauv Kev Siv Tau
Kev xav xwb tsis txaus; muaj ntau yam "zais cia" uas yuav pom tau hauv kev ua haujlwm tiag tiag.
Piv txwv li, "tus cwj pwm" ntawm cov khoom ua haujlwm (cov khoom muaj nyob hauv cov khoom siv) yog qhov tseem ceeb heev. Siv cov txheej txheem tib yam los tshuab cov hlau uas muaj zog siab piv rau cov txhuas mos yuav ua rau muaj txiaj ntsig sib txawv kiag li. Cov khoom mos muaj feem yuav hloov pauv yas, ua rau muaj "grooves" tob thiab dav thiab yooj yim txhaws; cov khoom tawv muaj feem yuav tawg tawm yooj yim, ua rau muaj ntau qhov.
Lwm qhov piv txwv yog "lub neej ntev" ntawm cov hmoov me me.Xim av fused alumina micro-hmoovyuav hnav thiab tawg raws sijhawm. Ib pawg hmoov tshiab muaj qhov loj me sib npaug, cov npoo ntse, thiab lub zog txiav muaj zog, ua rau muaj qhov sib npaug thiab loj sib npaug. Txawm li cas los xij, cov hmoov siv, nrog cov npoo puag ncig thiab qhov me me, dhau los ua "laus thiab hnav," nrog rau lub zog txiav tsawg dua, tej zaum yuav ua rau muaj qhov sib npaug me dua thiab sib npaug dua, tsim nyog rau qhov tiav "satin" ntawm qhov chaw sib xws. Nws tag nrho nyob ntawm koj cov txheej txheem xav tau.
Yog li ntawd, kawm txog qhov cuam tshuam ntawmxim av fused alumina micro hmoovntawm qhov roughness ntawm qhov chaw tsis yog tsuas yog ib qho teeb meem ntawm kev saib cov khoom siv thiab ua haujlwm raws li. Nws yog ib qho kev kos duab ntawm kev tswj hwm meej hauv lub ntiaj teb me me. Peb yuav tsum ua zoo li tus kws kho mob Suav uas muaj kev paub dhau los, txawj ntse txog cov khoom thiab txoj hauv kev ntawm "cov tshuaj ntsuab" xws li "cov khoom me me, siab, thiab lub kaum sab xis," thiab tom qab ntawd sib xyaw qhov no nrog "kev tsim kho" ntawm cov khoom siv ua haujlwm, txhawm rau sau cov "kev kho" zoo tshaj plaws thiab ua tiav qhov roughness ntawm qhov chaw zoo meej.