Qhuav dej khov blasting tau dhau los ua txoj kev tu neeg nrov hauv kev lag luam xws li tsheb thiab aerospace mus rau kev tsim khoom noj. Nws muaj txiaj ntsig zoo, eco-tus phooj ywg, thiab tshuaj lom neeg-dawb - tab sis ib qho lus nug tseem nyob: Puas yog cov dej khov qhuav qhuav ua rau cov hlau puas tsuaj?
Cov lus teb luv luv yog tsis yog - thaum ua kom raug, cov dej khov qhuav qhuav tsis ua rau cov hlau puas. Qhov tseeb, nws yog ib qho kev nyab xeeb tshaj plaws thiab meej tshaj plaws ntawm kev siv thev naus laus zis muaj rau cov hlau nto. Hauv tsab xov xwm no, peb yuav tshawb xyuas seb cov dej khov qhuav qhuav ua haujlwm li cas, vim li cas nws thiaj li muaj kev nyab xeeb rau cov hlau, yuav tsum ceev faj dab tsi, thiab cov kev lag luam twg tau txais txiaj ntsig zoo tshaj plaws los ntawm txoj kev no.
Dry Ice Blasting yog dab tsi?
Qhuav dej khov blasting, tseem hu ua CO₂ blasting los yog qhuav dej khov tu, yog ib tug tsis yog -abrasive tu tshuab uas siv cov khoom carbon dioxide pellets (qhuav dej khov) ua qhov nruab nrab ntxuav. Cov pellets no, ntawm qhov kub ntawm -78.5 degree, tau nrawm los ntawm huab cua compressed kom nrawm txog 300 m / s thiab coj mus rau saum npoo kom tshem tawm cov kab mob.
Lub zog ntxuav yog los ntawm peb lub tshuab:
- Kinetic cuam tshuam - lub zog ntawm cov pellets dislodges nto residues xws li roj, carbon, los yog xim.
- Thermal shock - qhov txias txias ua rau cov kab mob sib kis thiab tawg.
- Sublimation - cov dej khov qhuav tam sim ntawd hloov mus rau CO₂ roj, nthuav dav sai thiab tshem tawm cov khoom seem.
Tsis zoo li sandblasting lossis tshuaj ntxuav, cov dej khov qhuav qhuav tsis yog -abrasive, residue- dawb, thiab ib puag ncig tus phooj ywg. Tsis muaj dej, tsis muaj cov khoom pov tseg, thiab tsis muaj qhov yaig ntawm qhov chaw - ua rau nws zoo tagnrho rau kev ntxuav cov hlau tsis zoo lossis cov khoom muaj txiaj ntsig zoo.
Yog vim li cas Dry Ice Blasting tsis puas Metal
Qhuav dej khov blasting yog tsim tshwj xeeb los ntxuav tsis ua rau saum npoo los yog deformation. Kev nyab xeeb ntawm cov txheej txheem no yog txhawb nqa los ntawm physics thiab kev sim ntau yam kev lag luam.
1. Mos Ntxuav Nruab Nrab
Cov dej khov qhuav qhuav muaj Mohs hardness tsuas yog 1.5–{1}} softer dua aluminium (2.5–3.0) lossis hlau (4.0–4.5). Qhov no txhais tau hais tias lawv tsuas yog tsis tuaj yeem khawb lossis zom cov hlau nto, tsis zoo li cov xuab zeb lossis iav hlaws siv hauv kev sib tsoo blasting.
2. Tsawg kawg Thermal Stress
Txawm hais tias cov dej khov qhuav yog txias heev, cov hlau muaj thermal conductivity siab. Qhov kub ntawm qhov chaw hloov me ntsis xwb (feem ntau<15°C), far below the threshold for structural stress or cracking.
3. Lub zog tsom rau cov kab mob
Thaum cov dej khov qhuav tsoo rau saum npoo, nws sai sai sublimates. Lub zog yog siv los rhuav tshem kev sib txuas ntawm av thiab hlau - kom tsis txhob yaig cov hlau nws tus kheej.
4. Chemical Neutrality
Cov dej khov qhuav yog cov ntshiab CO₂. Nws tawm tsis muaj residue, ya raws, los yog tshuaj tom qab, txhais tau tias tsis muaj corrosion los ntawm acidic los yog alkaline tshuaj.
Cov hlau sib txawv li cas rau kev ntxuav dej khov qhuav
Kev ntxuav dej khov qhuav muaj kev nyab xeeb rau yuav luag txhua yam hlau. Txawm li cas los xij, kev nkag siab yuav ua li cas txhua hom teb pab txhim kho qhov tsis zoo rau cov txiaj ntsig zoo tshaj plaws.
|
Hom hlau |
Pom zoo siab (MPa) |
Nto nyhuv |
Tej kev siv |
|
Stainless hlau |
0.3–0.8 |
Tsis pom kev hloov |
Khoom noj khoom haus, pwm kho mob |
|
Aluminium Alloy |
0.2–0.6 |
Roughness hloov<0.1 μm |
Cav qhov chaw, aerospace Cheebtsam |
|
Tooj Alloy |
0.2–0.5 |
Tsis muaj oxidation, tsis muaj deformation |
Hluav taws xob tiv tauj, cua sov dab dej |
|
Magnesium alloy |
0.3–0.5 |
Yuav tsum muaj kev tiv thaiv kab mob - xeb |
Lub teeb automotive qhov chaw |
|
Coated Hlau |
0.3–0.6 |
Txheej poob<0.1 μm |
Electroplated los yog dai qhov chaw |
- Stainless hlau thiab hlau yog cov resistant heev thiab zoo tagnrho rau rov tu dua.
- Aluminium dissipates txias sai, yog li nws pom zoo tsis muaj deformation.
- Tooj thiab magnesium xav tau kev hloov pauv tab sis nyob nyab xeeb.
- Cov txheej txheem (zinc, chrome, anodized txheej) tsis cuam tshuam vim tsis yog -abrasive yam ntawm CO₂ pellets.
Muaj peev xwm txaus ntshai thiab yuav tiv thaiv lawv li cas
Thaum cov dej khov qhuav blasting nws tus kheej tsis ua mob rau cov hlau, qee yam ib puag ncig lossis kev ua haujlwm tuaj yeem ua rau muaj teeb meem tsis ncaj yog tsis quav ntsej.
1. Condensation thiab Corrosion
In high-humidity environments (>60%), CO₂ tuaj yeem sib xyaw nrog cov dej noo kom tsim cov carbonic acid tsis muaj zog, txo qis pH me ntsis.
Kev daws: Ua kev tu hauv qhov chaw qhuav, lossis qhuav qhov chaw tam sim tom qab blasting.
2. Cov kab mob chloride
Nto nrog ntsev los yog chloride residue (xws li, nyob ze ntawm ntug hiav txwv dej) yuav pom muaj zog corrosion.
Kev daws: Ua ntej- ntxuav nrog xab npum nruab nrab lossis siv cov txheej tiv thaiv tom qab ntxuav.
3. Porous hlau
Nyob rau hauv cov ntaub ntawv xws li cam khwb cia hlau, CO₂ roj yuav nkag mus rau hauv lub qhov hws nyob rau hauv siab.
Kev daws: Siv lub siab qis (tsawg dua lossis sib npaug ntawm 0.4 MPa) thiab ua tiav nrog cua sov kom qhuav lossis nitrogen tshuab- tawm.
Los ntawm kev ua raws li cov kev coj ua zoo tshaj plaws no, txawm tias cov khoom me me tuaj yeem raug ntxuav kom zoo yam tsis muaj corrosion lossis kev puas tsuaj.
Cov kev coj ua zoo tshaj plaws rau kev nyab xeeb thiab ua haujlwm zoo
Txhawm rau ua kom cov txiaj ntsig zoo thiab tiv thaiv koj cov cuab yeej, cov kws tshaj lij pom zoo:
- Kho cua siab raws li cov khoom siv - feem ntau 0.2–0.8 MPa.
- Maintaining correct distance (20–30 cm) and spray angle (>45 degree).
- Siv lub nozzle thiab pellet loj rau precision tswj.
- Kev tshuaj xyuas ua ntej ntxuav kom tawg lossis xeb.
- Qhuav thiab tiv thaiv tom qab ntxuav, tshwj xeeb tshaj yog nyob rau hauv cov huab cua ntub.
- Xaiv cov cuab yeej tshaj lij, xws li siab -kev ua haujlwm ntawm cov dej khov qhuav qhuav nrog kev kho siab thiab CO₂ ntws tswj.
Muaj kev siv ntawm Qhuav Ice Blasting
Kev ntxuav dej khov qhuav yog siv nyob rau hauv ntau hom hlau- ntsig txog kev lag luam vim nws qhov ua tau zoo thiab kev nyab xeeb:
- Automotive: Tshem tawm cov pa roj carbon deposits los ntawm lub cav thiab lub tshuab tso pa tsis muaj kev puas tsuaj rau pistons lossis lub tog raj kheej phab ntsa.
- Manufacturing: Ntxuav pwm, tuag, thiab machinery nrog xoom abrasion los yog tshuaj residue.
- Aerospace: Tswj cov turbine hniav, tsaws iav, thiab rhiab alloy Cheebtsam yam xyuam xim.
- Khoom noj khoom haus & Pharmaceuticals: Sanitize stainless hlau nto raws li FDA thiab USDA cov qauv.
- Electronics: Ntxuav cov tooj liab thiab txhuas tiv thaiv kom rov ua tau zoo yam tsis muaj oxidation.
Txhua daim ntawv thov tau txais txiaj ntsig los ntawm tsis yog- abrasive, qhuav, thiab seem- ntxuav dawb, txo qis sijhawm thiab txuas ntxiv lub neej ntawm cov khoom.
Xaus
Yog li ntawd, cov dej khov qhuav puas ua puas rau hlau?
Tsis yog - thaum ua kom raug, nws yog ib qho kev nyab xeeb tshaj plaws, huv tshaj plaws, thiab muaj txiaj ntsig zoo tshaj plaws rau kev tswj xyuas cov hlau. Nws tsis yog -abrasive xwm, tshuaj lom neeg nruab nrab, thiab versatility ua rau nws zoo tagnrho rau kev lag luam uas xav tau precision thiab kev ntseeg tau.
Yog tias koj tab tom nrhiav rau cov dej khov qhuav qhuav uas ua kom muaj kev nyab xeeb ntawm cov hlau, kev ua haujlwm siab, thiab kev ua raws li ib puag ncig, tshawb xyuas peb cov ntau yam.qhuav ice blasting tshuabtsim los rau kev lag luam hlau tu.