Thaum peb Surface Roughness ntawm Dazao, peb tsis yog tham txog qhov zoo nkauj ci ntawm ib feem. Peb tab tom tham txog Invisible Architecture uas txiav txim siab yog tias qhov siab -aerospace bearing ceev 10,000 teev. Los yog nws yuav txeeb tau hauv kaum.
HauvCNC machining, 3D luam ntawv, thiab txhaj tshuaj molding, nto tiav yog feem ntau tsis to taub CAD kos duab specification. Ib qho kev xav tsis zoo yog tias smoother ib txwm zoo dua. Ntawm Dazao, peb 20 xyoo ntawm lub khw-kev paub hauv pem teb hais tias lwm yam. Kev ua tiav ntawm qhov tsis raug tuaj yeem ua rau tsis ua haujlwm lossis nkim nyiaj.
Hauv phau ntawv qhia no, peb rhuav tshem cov ntsiab lus tseem ceeb ntawm qhov roughness. Peb piv Ra thiab Rz. Peb npog cov txheej txheem tsim khoom, cov nqi, thiab kev siv engineering tiag. Qhov no yuav pab koj txiav txim siab paub.
Dab tsi yogNto tiavhauv Machining?
Yuav kom nkag siab txog daim ntawv roughness saum npoo, ib tus yuav tsum xub nkag siab tias "sov" tiag tiag yog dab tsi. Nyob rau hauv lub ntiaj teb zoo meej Euclidean, lub dav hlau yog tiaj tus. Nyob rau hauv lub ntiaj teb no ntawm subtractive manufacturing, ib tug nto yog ib tug chaotic toj roob hauv pes ntawm peaks, hav, thiab ripples.
Roughness vs Waviness vs Form: Qhov sib txawv tseem ceeb hauv Nto tiav
Qhov profile saum npoo yog cov teeb liab sib xyaw ntawm peb qhov sib txawv geometric Cheebtsam:
· Roughness (Primary Profile):Cov no yog siab -frequency irregularities tshuav los ntawm cov cuab yeej txiav ntug. Lawv tuaj yeem los ntawm kev sib tsoo log grit lossis txheej - los ntawm - txheej 3D luam ntawv. Qhov no yog lub suab nrov peb ntsuas thiab ntsuas siv Ra thiab Rz.
· Waviness (Secondary Profile):Cov no yog qhov dav dua - spaced irregularities. Macro teeb meem feem ntau ua rau waviness. Cov no muaj xws li tshuab chatter, spindle runout, tshav kub expansion thaum txiav, thiab ua hauj lwm tsis ruaj khov. Koj tuaj yeem muaj tus nqi qis Ra ntawm ib feem uas tsis tshua muaj wavy, uas tseem yuav ua rau lub foob tsis ua haujlwm.
· Daim ntawv (Yam ntawm Cov Duab):Qhov no yog tag nrho qhov sib txawv ntawm qhov npaj geometry. Piv txwv li, lub tog raj kheej yuav muaj me ntsis taper. Ib lub phaj tiaj yuav muaj me ntsis hneev.
Surface Lay yog dab tsi thiab vim li cas nws tseem ceeb hauv Machining?
Lub Lay yog qhov kev taw qhia ntawm tus qauv nto moo tshaj plaws. Vim li cas qhov no tseem ceeb rau koj DFM (Design for Manufacturing)?
· Longitudinal Lay:Yog hais tias cov cuab yeej cim khiav mus rau qhov kev taw qhia ntawm kev txav, lawv txo qhov kev sib txhuam.
· Radial/Circular Lay:Feem ntau pom nyob rau hauv lub ntsej muag milling, qhov twg lub cutter tsim swirling arcs.
· Hla-Hatched Lay:Qhov tseem ceeb rau lub tog raj kheej cav (honing) kom ntseeg tau cov roj tuav.
Ntawm Dazao, peb tsis yog ntaus tus lej ntawm daim ntawv; peb taw qhia qhov Lay rau koj txoj haujlwm ua haujlwm.
Surface Roughness Parameters piav qhia (Ra, Rz, Rq & Ntau)
Qhov yuam kev tseem ceeb tshaj plaws hauv kev tsim vaj tsev niaj hnub no yog qhov dhau - kev cia siab rau Ra (Roughness Average). Thaum Ra yog kev lag luam lingua franca, nws yog ib qho kev ntsuas nruab nrab uas feem ntau zais qhov tseeb.
Dab tsi yog Ra hauv Surface Roughness? Txhais, Formula thiab txwv
Ra yog tus lej lej nruab nrab ntawm txhua qhov profile sib txawv ntawm cov kab nruab nrab. zoo heev rau kev tswj xyuas zoo vim nws ruaj khov thiab rov ua dua.
Txawm li cas los xij, Ra tseem tsis tau paub txog dab tsi ua rau lub ncov siab. Ib qhov chaw nrog ntse, koob-zoo li lub ncov thiab ib qho chaw nrog puag ncig, toj -zoo li lub ncov tuaj yeem muaj Ra. Cov ntse peaks yuav rhuav tshem cov yas mating; cov rounds yuav tsis.
Rz yog dab tsi thiab vim li cas nws tseem ceeb rau kev ua tau zoo sealing?
Rz ntsuas qhov nruab nrab ntawm qhov nruab nrab ntawm tsib lub siab tshaj plaws thiab tsib qhov tob tshaj plaws.
Lub Dazao Engineering Insight: Rau hydraulic qhov chaw, lub tshuab nqus tsev ntsaws ruaj ruaj, thiab siab -siab fittings, tsuas yog Rz teeb meem. Ib qho kev sib sib zog nqus tob (txoj kev xau) tuaj yeem tso cov kua dej dhau los ntawm lub foob.Ra yuav nruab nrab lub kwj deg tawm thiab muab rau koj hla, tab sis ib feem yuav xau hauv thaj teb.
Rq (RMS Roughness): Thaum rhiab heev teeb meem ntau dua qhov nruab nrab
Lub hauv paus ntsiab lus Square yog rhiab heev rau qee zaus highs thiab lows tshaj Ra.
Tus qauv hauv kev lag luam kho qhov muag thiab rau siab -cov iav thiab iav cov khoom.
Advanced Surface Roughness Parameters: Rsk (Skewness) thiab Rku (Kurtosis)
Txhawm rau pab koj tus qauv tsim kom ncav cuag qib siab ntawm EEAT, xav txog cov hauv qab no.
Rsk (Skewness):Qhov no qhia tau hais tias qhov saum npoo yog qhov siab tshaj -qhov tseem ceeb lossis lub hav-dominant.Ib qhov tsis zoo (ntau lub kwj ha) zoo tagnrho rau cov zawv zawg zawv zawg qhov chaw vim tias cov kwj ha ua raws li cov roj ntim cov roj microscopic.
Kurtosis (Rkutosis):Qhov no ntsuas qhov spikiness.A Kurtosis tus nqi ntawm 3 yog Gaussian tis. Tus nqi saum toj no 3 txhais tau hais tias qhov saum npoo yog abrasive thiab yuav ua rau kev hnav sai sai (qhov so- nyob rau lub sijhawm).
Nto Roughness Chart (Ra, Rz, N Qib & Machining Methods)
(Cov hauv qab no yog cov ntaub ntawv tseem ceeb rau Dazao txoj kev siv. Nco ntsoov suav nrog N-Qib thiab Tus Nqi Sib Tw.)
|
Txoj kev Machining |
Rau (µm) |
Rau (µin) |
Rz (µm) |
N-Qib |
Function/Application |
Dazao Tus Nqi Index |
|
Nplaim / Plasma Txiav |
25 - 50 |
1000 - 2000 |
100 - 200 |
N12 |
Cov qauv thav duab, puag daim hlau |
1.0x |
|
Xuab zeb Casting |
12.5 - 25 |
500 - 1000 |
50 - 100 |
N11 |
Pump vaj tse, raw cav blocks |
1.1x |
|
Rough Milling / Tig |
3.2 - 12.5 |
125 - 500 |
12.5 - 50 |
N9 |
Clearance nto, tsis yog -mating qhov chaw |
1.5x |
|
Nruab nrab Machining |
1.6 - 3.2 |
63 - 125 |
6.3 - 12.5 |
N8 |
Standard bolts, brackets, vaj tse |
2.0x |
|
Fine Machining |
0.8 - 1.6 |
32 - 63 |
3.2 - 6.3 |
N7 |
Mating nto, zawv zawg qhia |
3.0x |
|
Sib tsoo / Fine Milling |
0.4 - 0.8 |
16 - 32 |
1.6 - 3.2 |
N6 |
Cov rooj tog zaum, siab -cov khoom siv kev ntxhov siab |
5.0x |
|
Honing/Lapping |
0.1 - 0.2 |
4 - 8 |
0.4 - 0.8 |
N3 |
Hydraulic spools, injector nozzles |
8.0x |
|
Daim iav Polishing |
< 0.05 |
< 2 |
< 0.2 |
N1 |
Optical lo ntsiab muag, phais implants |
15x+ |
ISO 21920 Nto Roughness Standard piav qhia
Feem ntau "Surface Roughness Charts" nyob rau hauv lub vev xaib yog dhau los, tseem xa mus rau ISO 4287. Ntawm Dazao, peb txaus siab rau peb tus kheej ntawm kev ua tiav ntawm cov qauv ntsuas ntsuas. Xyoo 2021, ISO tau tshaj tawm ISO 21920 los hloov cov laus 4287.
Yog vim li cas lub Shift?
Cov kws tsim qauv tsim cov qauv qub rau lub sijhawm ntawm analog stylus meters. Tus qauv tshiab txhawb nqa Optical Profilometry thiab kev ua cov ntaub ntawv digital.
· Filter Settings (Txiav-tawm):Tus qauv tshiab rov txhais li cas peb xam qhov "txiav- tawm" ntev (λc). Yav dhau los, engineers feem ntau tsis quav ntsej qhov kev txiav - tawm. Qhov no ua rau muaj kev ntsuas sib txawv rau tus neeg muag khoom thiab cov neeg siv khoom.
· Ua kom pom tseeb:ISO 21920 txuas cov lej ntawm daim ntawv mus rau qhov ua haujlwm tiag tiag. Yog tias koj tus neeg muag khoom tam sim no tsis yog ISO 21920, lawv poob qab lub ntiaj teb nkhaus.
Cov ntaub ntawv sib txawv cuam tshuam li cas rau saum npoo tiav?(Aluminium, Hlau, Titanium)
Koj tsis tuaj yeem hais meej Ra 0.4 ntawm txhua yam khoom siv thiab cia siab tias yuav tau txais cov txiaj ntsig zoo ib yam.
Aluminium(6061-T6, 7075): Tswj Kev Txhim Kho Edge thiab Smearing
Aluminium yog mos thiab muaj thermal expansion coefficient. Yog tias lub cuab yeej txiav tsis yog "daim iav- polished" thiab RPM tsis siab txaus, cov txhuas yuav smear es tsis yog txiav.Qhov no tsim ib qho Built-up Edge (BUE), uas ua rau lub npoo tiav. peb siv Pob Zeb Diamond-Zoo li Carbon (DLC) coated cov cuab yeej kom ua tiav Ra 0.4 ntawm txhuas yam tsis muaj polishing theem nrab.
Stainless hlau(304, 316L): Overcoming Work-Hardening in finishing
Stainless hlau yog cov khoom siv ruaj khov heev. Yog hais tias lub cuab yeej nyob twj ywm rau saum npoo rau ib millisecond ntev dhau lawm, qhov chaw ua hauj lwm - hardens.
Tom qab ntawd nws yuav ua tsis tau kom tiav mus rau qis Ra. Peb siv siab -siab, los ntawm -spindle coolant kom tshem tawm cua sov sai. Qhov no pab tswj kev ua tiav N6 zoo ib yam.
Titanium: Tsawg-Modulus Sib Tw hauv Nyias-Walled Aerospace Parts
Titanium yog hloov tau. Thaum lub cuab yeej thawb tawm tsam nws, cov khoom siv rov qab sai sai. Qhov no ua rau kom ua tiav qhov zoo Rz tus nqi nyuaj heev hauv nyias - cov phab ntsa aerospace. Peb siv tshwj xeeb vibration-damping tool tuav los tiv thaiv no chatter.
Surface Finish Cost vs Roughness (Ra 6.3 txog 0.05 Piav)
Muaj "Puas" ntawm Ra 0.8 (32 µin).
Nto Roughness Tus nqi nkhaus: Vim li cas Ra 0.4 Yog Tus Nqi
· Los ntawm Ra 6.3 rau 1.6:Tus nqi nce yog linear. Nws feem ntau yog hais txog tus nqi pub thiab lub sijhawm voj voog.
· Los ntawm Ra 1.6 rau 0.8:Tus nqi nkhaus pib khoov upward. Peb yuav tsum qhia "Wiper" inserts, txo cov cuab yeej kev cia siab, thiab ua ib nrab ntawm -kev soj ntsuam.
· Hauv qab Ra 0.4:Tus nqi tawg. Koj tsis yog "machining" lawm; koj "ua tiav." Qhov no yuav tsum muaj kev sib cais ntawm lub tshuab sib tsoo lossis kev siv tes ua haujlwm los ntawm tus tswv polisher.
Yuav ua li cas txo Machining nqi nrog Functional Surface Finish Zoning?
Tsis txhob txhais ib qho tag nrho saum npoo tiav rau tag nrho ib feem. Peb pab peb cov neeg siv khoom siv Functional Zoning:
· Mating Surfaces: Ra 0.8
· Foob qhov chaw: Rz 3.2
· Exposed/Aesthetic Surfaces: Ra 1.6
· Internal / Hidden Pockets: Ra 6.3
Los ntawm kev sib txawv ntawm cov cheeb tsam no, peb tau pab cov neeg siv khoom txo lawv cov nqi BOM (Bill of Materials) txog li 40%.
Yuav Ua Li Cas Cov Kev Kho Nto Ua Rau Nto Roughness (Anodizing, Polishing, Blasting)
Yuav ua li cas tom qab lub tshuab CNC nres? Tshaj tawm - kev ua tiav tuaj yeem txuag lossis rhuav tshem koj qhov chaw tiav.
Bead Blasting:Feem ntau siv los nkaum cov cim machining. Txawm li cas los xij, hlaws blasting yuav nce Ra ntawm ib feem ntawm cov tshuab ua haujlwm zoo. Yog tias koj muaj Ra 0.8 tiav thiab tom qab ntawd hlaws tawg nws, koj yuav zoo li xaus nrog Ra 2.0 matte tiav.
Anodizing (Hom II vs Hom III):Hard anodizing (Type III) tsim ib txheej tuab ntawm txhuas oxide. Cov txheej no ua raws li tus thawj topography tab sis ntxiv nws tus kheej "grain." Feem ntau, koj yuav tsum xav tias Ra nce ntawm 10-20% tom qab nyuaj anodizing.
Electropolishing:Tus cawm seej ntawm kev kho mob kev lag luam. Nws tshem tawm "micro-peaks" siv cov txheej txheem electrochemical. Qhov no txo cov Ra thiab tsim cov tshuaj huv si, du nto.
Yuav Ua Li Cas Nto Roughness Ntsuas (Cov Cuab Yeej & Txheej Txheem)
Yog tias koj ntsuas tsis tau, koj tsis muaj nws. Peb lub chaw ua haujlwm zoo yog nruab nrog:
· Stylus Profilometers (Kev Sib cuag): Rau rugged, txhim khu kev qha Ra / Rz cov ntaub ntawv ntawm tus qauv qhov chaw.
· Confocal Microscopy (Tsis yog-Kev Sib cuag): Rau cov ntaub ntawv me me lossis thaum peb xav tau daim ntawv qhia 3D ntawm qhov chaw (S- tsis muaj).
· Visual Comparators: Rau kev tshawb xyuas sai-ins thaum lub sijhawm tsim khoom kom paub tseeb tias tsis muaj cov cuab yeej siv tau tshwm sim.
Yuav ua li cas pub tus nqi thiab cuab yeej Radius cuam tshuam rau saum npoo Roughness?
Ntau tus engineers saib ntawm daim ntawv qhia qhov roughness thiab xav tias lub tshuab tsuas yog "tso tawm" tus lej ntawd. Peb paub tias qhov kawg ntawm qhov kawg yog qhov ua lej ntawm cov cuab yeej geometry thiab cov lus tsa suab.
Rt thiab Ra los ntawm Feed Rate thiab Nose Radius
Rautigthiabmilling, koj tuaj yeem xam qhov theoretical ncov- rau- hav qhov siab (Rt) siv tus nqi pub (f). Koj kuj xav tau lub cuab tam lub qhov ntswg radius (r).
Thiab qhov nruab nrab arithmetic (Ra) yog kwv yees li:
Lub Dazao Engineering Insight:
Txhawm rau txo koj tus nqi Ra ib nrab, koj muaj ob txoj kev xaiv:
· Txo tus nqi pub (f) los ntawm ib nrab, uas ua rau koj lub sijhawm ua haujlwm ob npaug (thiab tus nqi).
· Nce lub qhov ntswg lub qhov ntswg (r). Txawm li cas los xij, lub vojvoog loj dua tuaj yeem ua rau lub cuab yeej siab thiab tuaj yeem ua rau "sib tham" (waviness) hauv nyias- cov phab ntsa.
Qhov no yog qhov uas Dazao tus tswv machinists khwv tau lawv khaws - ntsuas lub vojvoog thiab pub kom ntaus koj cov spec yam tsis tau tshuab nyiaj txiag.
Surface Finish Requirements los ntawm Kev Lag Luam (Aerospace, Kho Mob, Hydraulic)
Cov kev lag luam sib txawv muaj qhov yuav tsum tau zais uas tsis tshwm sim ntawm tus qauv txheej txheem roughness daim ntawv.
Aerospace: Fatigue Life thiab Stress Risers
Nyob rau hauv aerospace (xws li, turbine blades los yog structural tsaws iav), ib tug nto tsis yog ib tug nto xwb. Ib qho ntxhib tiav (Ra> 3.2) ua raws li cov kev ntxhov siab nce siab. Nyob rau hauv cyclic loading, cov kab nrib pleb pib nyob rau hauv qab ntawm cov microscopic hav.
Dazao's Aerospace Protocol: Peb feem ntau siv Phom Peening tom qab machining. Txoj kev no hits nto nrog me me spherical media.
Nws tsim compressive residual stresses. Cov kev ntxhov siab no ua rau cov kwj ha hauv qhov roughness profile. Qhov no tuaj yeem ua kom ntev lub neej qaug zog.
Kev Kho Mob: Biocompatibility thiab Bacteria Retention
Rau orthopedic implants (hip pob qij txha, pob txha screws), tus nqi Ra yog ib qho teeb meem ntawm lub neej thiab kev tuag.
· Txoj Kev:Yog tias qhov chaw du dhau lawm (Ra <0.05), cov pob txha pob txha yuav tsis ua raws (osseointegration).
· Kev phom sij:Yog tias nws ntxhib heev (Ra> 0.8), cov kwj ha tuaj yeem muaj cov kab mob uas tiv taus kom tsis muaj menyuam.
· Dazao's Solution:Peb siv Centrifugal Barrel Finishing los tsim qhov tsis yog -directional, isotropic tiav. Nws ua tau raws li Rz kev kho mob nruj.
Hydraulics: Lub "Seal{0}}Killer" Nto
Hauv hydraulic thooj voos kheej kheej, tus pas nrig piston yuav tsum du txaus kom tsis txhob hnav lub foob. Nws kuj yuav tsum yog ntxhib txaus los tuav ib zaj duab xis nyias ntawm cov roj.
Qhov Sweet Spot: Ib Ra ntawm 0.2 txog 0.4 µm yog tus qauv. Tab sis qhov tseem ceeb tshaj, koj yuav tsum tswj Rmax. Ib lub pob tsuas tuaj yeem rhuav tshem qhov siab - siab polyurethane foob, ua rau muaj kev puas tsuaj rau cov kua dej xau.
Common Surface Finish Defects thiab yuav kho lawv li cas
Thaum ib feem tawm ntawm lub tshuab thiab tsis ua raws li tus qauv Dazao, peb saib rau plaub qhov Surface Killers:
1.Chaw (Waviness):
· Cov tsos mob:Periodic nthwv dej los yog "tus tsov kab txaij."
· Ua rau:Tsis muaj rigidity nyob rau hauv lub teeb los yog harmonic resonance.
· Solution:Hloov cov spindle ceev (SSV - Spindle Speed Variation) los yog siv qhov sib txawv -helix kawg mills.
2.Tearing (BUE - Ua-Up Ntug):
· Cov tsos mob:Plucked los yog npub, ntawv xuab zeb -zoo li nto.
· Ua rau:Txiav ceev yog tsawg dhau. cov khoom yog welding rau lub cuab yeej.
· Solution:Nce txiav ceev (Vc) thiab hloov mus rau siab -lubricity PVD txheej.
3.Feed Marks:
· Cov tsos mob:Pom cov xov ntawm ib feem.
· Ua rau:Pub tus nqi yog siab dhau ntawm lub qhov ntswg vojvoog.
· Solution:Siv Wiper ntxig, uas muaj thaj tsam me me ntawm ntug txiav kom hlau tawm cov cim pub.
4. Kev kub nyhiab:
· Cov tsos mob:Ib tug ci tab sis smeared nto.
· Ua rau:Cov cuab yeej yog npub thiab txhuam tsis yog txiav.
· Solution:Tam sim ntawd hloov cov cuab yeej thiab tshawb xyuas kev ua haujlwm - hardening hauv cov khoom.
Environmental Impact ntawm Nto Finishing hauv Manufacturing
Raws li lub luag haujlwm tsim khoom lag luam, Dazao kuj tseem txiav txim siab txog kev ruaj ntseg ntawm cov khoom siv nto. High-precision finishing (sib tsoo, Lapping, Polishing) siv ntau lub zog.
Nws kuj tsim swarf. Swarf yog cov hmoov hlau zoo sib xyaw nrog cov dej txias. Swarf yog ib qho nyuaj rau rov ua dua dua li txheej txheem CNC chips.
Peb Cov Lus Qhia:
Los ntawm kev siv Ra 1.6 hloov Ra 0.4 qhov twg nws tseem ua haujlwm, koj tuaj yeem txiav cov pa roj carbon hneev taw los ntawm 25%. Qhov no yog lub sij hawm siv tshuab tsawg dua thiab siv cov khoom pov tseg tsawg dua.
3D Surface Roughness Parameters (ISO 25178 piav qhia)
Lub ntiaj teb tab tom txav los ntawm 2D (Profile) mus rau 3D (Areal) qhov ntsuas saum npoo. Qhov no yog ISO 25178 tus qauv.
Sa (Areal Average Roughness): Hloov ntawm ib kab, peb ntsuas thaj tsam square.
Sp (Maximum Peak): Qhov tseem ceeb rau kev txheeb xyuas "burrs" lossis cov chaw siab hauv 3D luam ntawv hlau.
Sv (Maximum Valley): Qhov tseem ceeb rau kev kuaj xyuas cov roj nplua nyeem.
Ntawm Dazao, peb nqis peev hauv White Light Interferometry (WLI). Qhov no pab peb xa tag nrho 3D daim duab qhia chaw rau lub hom phiaj- qhov tseem ceeb.
Xaus
Daim ntawv roughness saum npoo yog ntau tshaj li cov lej; nws yog ib txoj hauv kev rau kev ua tiav engineering.
Peb ntseeg tias qhov kev pom tseeb yog tus yuam sij rau kev sib koom tes ua tiav. Los ntawm kev paub tias Ra 0.8 tiav nqi ntau dua Ra 3.2 tiav, koj tsim tau zoo dua. Koj kuj tsim tau zoo dua thaum koj paub thaum twg siv Rz hloov Ra.
Peb lub hom phiaj yog txhawm rau txuas qhov sib txawv ntawm "Digital Design" thiab "Physical Reality." Txawm hais tias koj tab tom tham nrog kev sib tham ntawm titanium aerospace ib feem, peb pab neeg ua haujlwm tuaj yeem pab.
Peb kuj tuaj yeem pab koj txo tus nqi ntawm ib lub tsev nyob hauv tsheb.
FAQ
01.Puas "Zoo" nto ib txwm txhais tau tias "Low Ra" nto?
Tsis yog. Qhov no yog ib qho kev pom qhov muag pom. Ib qhov chaw tuaj yeem hlais- blasted rau matte tiav thiab muaj Ra ntawm 1.2. Los yog, koj tuaj yeem hlawv nws nrog lub cuab yeej npub kom nws zoo li ci iab.
Nws tseem yuav muaj Rz siab thiab tob micro- tawg. Nco ntsoov cia siab rau qhov profileometer, tsis yog koj ob lub qhov muag.
02.Vim li cas kuv qhov kev ntsuas Ra txawv ntawm ob lub khw sib txawv?
03.Can 3D luam ntawv ua tiav CNC-theem roughness?
Txheem DMLS (Hlau 3D Printing) feem ntau ua rau ib qho Ra ntawm 10-15 µm. Txhawm rau kom ncav cuag "CNC zoo" (Ra 1.6), koj xav tau cov txheej txheem thib ob.
Cov no suav nrog HIDP (High-Intensity Diffusion Polishing) lossis CNC re-machining ntawm qhov tseem ceeb interfaces.
04.Qhov txheej txheej (zoo li DLC lossis Chrome) cuam tshuam li cas rau Ra?
05.Kuv ib feem yog nyob rau hauv spec raws li tus nqi Ra, tab sis nws zoo nkaus li txaus ntshai nrog "pom dab kab" lossis "huab". Qhov no puas yog machining tsis ua hauj lwm?
Ra yog qhov nruab nrab, txhais tau tias nws tuaj yeem npog qhov pom qhov tsis xws luag xws li kev co (sib tham) lossis cov cim cim. Ib feem tuaj yeem ntsuas Ra 0.8 tab sis muaj huab cua tshwm sim vim qhov siab Waviness (Wt) lossis qhov tsis sib xws Lay.
Peb qhia tias yog tias kev zoo nkauj yog qhov tseem ceeb, koj yuav tsum tau hais kom pom qhov yuav tsum tau ua nrog rau tus nqi Ra, los yog siv Surface Finish Comparator los txhais cov kev ntxhib los mos. Ra ntsuas tus lej, tab sis nws tsis ntsuas qhov zoo nkauj.
06.I teev Ra 0.8, tab sis tom qab Hom II Anodizing, qhov saum npoo zoo li rougher. Leej twg yog tus lav?
Anodizing (tshwj xeeb tshaj yog Hard Coat Type III) tsim ib txheej txheej aluminium oxide uas ua raws li -thiab feem ntau ua kom zoo dua - cov hauv paus qoob loo. Yog tias koj xav tau qhov kawg Ra ntawm 0.8 tom qab txheej, koj yuav tsum qhia kom meej lub tshuab ua kom tiav Ra 0.4 lossis smoother.
Tswv yim:Ib txwm hais ntawm koj daim duab seb qhov kev xav tau roughness siv "Ua ntej Plating" lossis "Tom qab Plating." Peb pab pawg DFM tau kuaj xyuas qhov no los tiv thaiv cov teeb meem sib dhos tom qab- txheej.
