Puas yog sandblasting haum rau txhua qhov hlau 3D luam tawm?

Ib, Lub luag haujlwm tseem ceeb thiab kev txwv ntawm kev siv tshuab sandblasting
1. Lub hom phiaj tseem ceeb ntawm sandblasting
Sandblasting siv compressed cua los thawb abrasives xws li quartz xuab zeb, pob zeb diamond xuab zeb, iav hlaws, thiab lwm yam rau saum npoo ntawm qhov chaw sai heev. Qhov no muaj cov teebmeem hauv qab no:
Ntxuav qhov chaw: tshem tawm cov av zoo li oxide nplai, cov roj me me, thiab cov hmoov uas tsis tau fused;
Kev tswj ntawm roughness: Hloov qhov roughness ntawm qhov chaw (Ra 0.8–6.3 μ m) los ntawm kev hloov qhov loj ntawm cov khoom abrasive (80–240 mesh) thiab lub siab ntawm lub dav hlau (0.2–0.8MPa). Kev ntxhov siab tso tawm: Qhov cuam tshuam tuaj yeem pab tshem tawm qee qhov kev ntxhov siab sab laug los ntawm kev luam ntawv thiab txo txoj hauv kev deformation.
Txheej pretreatment: ua rau saum npoo rougher kom cov txheej nplaum zoo dua (piv txwv li, txheej hydroxyapatite rau saum npoo ntawm titanium alloy implants).
2. Dab tsi Sandblasting ua tsis tau
Kev pheej hmoo ntawm nyias- cov qauv phab ntsa: Dav hlau siab tuaj yeem hloov cov duab lossis ua qhov hauv nyias- cov phab ntsa (thickness <0.5 mm). Qhov muag tsis pom kev nyob rau hauv txoj kab noj hniav nyuaj: Nws yog ib qho nyuaj rau nkag mus rau hauv lub qhov lossis hauv cov kab nrog txoj kab uas hla tsawg dua 2 hli, thiab cov hmoov seem yuav tsum tau ntxuav kom huv.
Kev pheej hmoo ntawm kev puas tsuaj saum npoo: Cov tawv abrasives zoo li silicon carbide tuaj yeem txhuam cov hlau mos zoo li aluminium alloys.
Poob qhov tseeb: Sandblasting ntau dhau tuaj yeem ua rau cov khoom zoo xws li xov thiab microstructures, uas yuav tsum tau kho los ntawm CNC machining tom qab.
2, Qhov cuam tshuam ntawm cov khoom siv rau kev siv ntawm Sandblasting
Lub hardness, ductility, thiab inclination rau oxidize ntawm cov hlau sib txawv ncaj qha cuam tshuam rau kev xaiv ntawm sandblasting txheej txheem tsis:
1. Titanium alloy (Ti6Al4V)
Kev siv tau: Nws yog cov khoom siv zoo tshaj plaws rau aviation cav hniav thiab orthopedic implants vim nws muaj zog heev thiab tsis xeb. Sandblasting tuaj yeem tshem tawm ntawm qhov chaw oxide nplai thiab ua kom cov coatings zoo dua.
Optimizing txheej txheem:
Xaiv cov abrasive: Siv iav hlaws lossis alumina xuab zeb es tsis txhob siv silicon carbide kom tsis txhob khawb qhov chaw.
Kev tswj lub siab: Txhawm rau kom nyias nyias- cov phab ntsa tsim los ntawm kev khoov, cov tshuaj tsuag yuav tsum tsawg dua 0.4MPa.
Tom qab sandblasting, acid ntxuav (HF + HNO3) yog xav tau kom tshem tawm cov imbedded abrasives. Tom qab ntawd, qhov saum npoo yog polished kom tau txais kev kho mob - qib tiav nrog Ra<0.8 μ m.
2. Aluminium alloy (AlSi10Mg)
Kev siv tau zoo: Vim tias nws yog lub teeb, nws feem ntau siv rau hauv tsheb qhov chaw. Tab sis qhov saum npoo ntawm aluminium alloy yog ib qho yooj yim rau oxidize, thiab sandblasting xav tau kev sib npaug ntawm kev huv thiab du.
Txhim kho cov txheej txheem:
Xaiv ib qho abrasive: dawb corundum lossis garnet xuab zeb nrog cov khoom uas yog 120 txog 180 mesh loj;
Txhawm rau kom lub zog qaug zog los ntawm kev poob qis, kev tswj xyuas siab yuav tsum nyob nruab nrab ntawm 0.3 thiab 0.5 MPa kom cov coarsening tsis ua phem heev.
Txhawm rau kom tsis txhob re-oxidation, ua anodizing lossis txheej txheej tom qab sandblasting.
3. Stainless hlau (316L)
Siv: Vim tias nws tsis xeb, nws yog cov khoom siv tseem ceeb rau cov khoom noj thiab tshuaj lom neeg. Sandblasting tuaj yeem ua rau qhov chaw ntau dua, tab sis koj yuav tsum tau ceev faj kom tsis txhob ua kom puas hauv qab.
Txhim kho cov txheej txheem:
Xaiv ib qho abrasive: stainless hlau pellets lossis ceramic hlaws kom ferrite los ntawm kev sib xyaw;
Kev tswj lub siab: 0.5-0.7 MPa, uas ua rau cov phab ntsa sab hauv ntawm lub qhov tob kom huv si.
Kev ntsuas tus qauv: Fluorescence penetrant testing (PT) yuav tsum tau ua tom qab sandblasting kom paub tseeb tias tsis muaj kab nrib pleb.
4. High-kub alloy raws nickel (Inconel 718)
Kev siv tau: Cov khoom uas ua haujlwm ntawm qhov kub thiab txias, xws li turbine discs hauv lub dav hlau cav, yuav tsum muaj peev xwm ua haujlwm hnyav heev. Sandblasting tuaj yeem txo kev ntxhov siab thaum luam ntawv, txawm li cas los xij nws yog ib qho tseem ceeb kom tsis txhob cuam tshuam intergranular corrosion.
Txhim kho cov txheej txheem:
Xaiv ib qho abrasive: alumina xuab zeb los yog silicon carbide xuab zeb nrog ib tug particle loj ntawm 80 mus rau 120 mesh.
Tswj lub siab: 0.6 txog 0.8 MPa kom tau txais cov nyhuv roughening;
Tom qab sandblasting, ib qho kev daws teeb meem (1080℃rwb thaiv tsev rau 1 teev) yog xav tau los kho cov kev puas tsuaj uas tshwm sim hauv qab ntawm qhov chaw.
3, Qhov teeb meem uas cov qauv ntawm cov khoom poses rau cov txheej txheem sandblasting
1. Cov qauv uas nyias nyias-walled thiab lub teeb
Case: Tom qab sandblasting, ib qho tshwj xeeb aviation bracket (nrog rau phab ntsa tuab ntawm 0.3mm) hloov cov duab los ntawm 15%, uas ua rau lub rooj sib txoos ua tsis tiav.
Kev daws: Siv qis - siab sandblasting (0.2-0.3 MPa) thiab cov khoom siv sib tw kom sib kis tau qhov cuam tshuam sib npaug.
Txhawm rau kom tsis txhob muaj kev puas tsuaj, koj tuaj yeem siv tshuaj txhuam hniav (nrog nitric acid thiab hydrofluoric acid) lossis electrolytic polishing.
2. Ib qho nyuaj lumen thiab microporous qauv
Case: Tom qab sandblasting, cov hmoov seem seem ntawm cov roj nozzle (nrog rau sab hauv txoj kab uas hla ntawm 1.5mm) yog siab li 30%.
Kev daws: Txhawm rau tshem tawm cov hmoov loj loj, kev tshuaj ntsuam kev vibration yog ua;
Txhawm rau kom paub tseeb tias sab hauv ntawm cov kab noj hniav yog huv rau ISO 16232-10 Chav Kawm 5, peb siv cov xuab zeb blasting thiab ultrasonic tu (40kHz zaus, 10 feeb).
3. Nto nrog kev ua haujlwm meej
Piv txwv li, tom qab sandblasting, smoothness ntawm ib tug optical pwm nrog ib tug nto roughness ntawm Ra<0.2 μ m was lowered to Ra 1.6 μ m, which does not match the standards for injection molding.
Kev daws: Siv magneto rheological polishing (MRF) los yog kua polishing kom tau sub-micron precision;
Segmented processing: Sandblasting tsuas yog siv los ua kom cov seem uas tsis ua haujlwm, thaum phau ntawv polishing tsuas yog siv los ua kom du thaj chaw uas ua.
4, Lub neej yav tom ntej ntawm sandblasting tshuab
1. Ntse tswj
Kev Tsim Kho: Ib qho kev sib txuas ua ke ntawm lub tshuab tsis pom kev thiab lub zog tawm tswv yim, nrog rau lub peev xwm los hloov cov tshuaj tsuag thiab lub kaum ntse ntse hauv lub sijhawm tiag tiag kom tsis txhob overspray lossis underspray.
IEPCO sandblasting tshuab nyob rau hauv lub teb chaws Yelemees tau mus txog kaw - voj tswj, uas tuaj yeem ua kom tus nqi deformation ntawm nyias- cov phab ntsa hauv qab 0.1%.
2. Kev hloov kho ntsuab: Siv cov khoom siv rov ua dua tshiab (xws li cov hlaws ceramic) thiab cov dej khov ua kom qhuav los txiav cov plua plav paug thiab tus nqi ntawm kev tshem cov khib nyiab.
Cov ntaub ntawv: Muab piv rau cov txheej txheem ib txwm, cov dej khov qhuav qhuav siv 40% tsawg zog thiab tsis muaj tshuaj lom neeg seem, uas yog raws li REACH cov cai.
3. Kev sib xyaw ua ke ntawm cov txheej txheem sib xyaw
Kev loj hlob: Siv sandblasting, laser tu, plasma spraying, thiab lwm yam technologies ua ke los muab ib qho kev kho mob rau "tu roughening txheej."
Cov ntaub ntawv: Cov txheej txheem "sandblasting + laser cladding" yog siv rau ntawm ib lub dav hlau cav hniav. Qhov no txiav lub sijhawm ua haujlwm ntawm 72 teev mus rau 24 teev.