Surface Finish yog dab tsi?

Deg tiav yog hais txog kev ntxhib los mos thiab topography ntawm cov khoom tsim cov txheej txheem txheej, uas yog roughness, waviness, thiab lays qauv. Cov cuab yeej no txiav txim siab seb qhov chaw zoo li cas, zoo li, thiab ua tiav hauv nws daim ntawv thov. Cov kws tsim qauv qhia qhov ua tiav saum npoo siv cov qauv ntsuas zoo li Ra (qhov nruab nrab qhov ntxhib) thiab Rz (ncej- txog -} qhov siab), feem ntau qhia hauv micrometers lossis microinches.

Qhov zoo ntawm qhov chaw tiav ncaj qha cuam tshuam rau kev ua haujlwm ntawm cov khoom. Hauv kev tsim khoom xws liHlau Txhaj Molding, ua kom tiav qhov chaw tiav yog qhov tseem ceeb rau kev ua haujlwm ib feem, raws li cov khoom siv sintered feem ntau ncav cuag qhov ntom siab tshaj 97% nrog rau qhov chaw roughness nyob ib ncig ntawm 0.8 micrometers ua ntej ua tiav cov haujlwm ntxiv.

Ua kom yooj yim, lub ntsiab lus ntawm qhov chaw tiav yog hais txog tag nrho cov xwm txheej ntawm ib feem ntawm txheej txheej tom qab tag nrho kev tsim khoom thiab xa tawm - cov txheej txheem ua tiav. Txhawm rau txheeb xyuas qhov ua tiav hauv cov ntsiab lus: nws yog qhov sib xyaw ua ke ntawm roughness, waviness, thiab nteg uas txiav txim siab seb qhov ua tiav saum npoo zoo li cas, zoo li, thiab ua tau zoo. Txawm hais tias lub ntsiab lus ntawm kev ua tiav saum npoo yuav zoo li yooj yim, lub tswv yim nqa qhov hnyav engineering hnyav-txhua qhov txheej txheem ntog tawm ib qho kev kos npe tshwj xeeb rau ntawm qhov chaw ua haujlwm, thiab qhov kos npe ncaj qha cuam tshuam rau qhov ua haujlwm zoo li cas hauv kev pabcuam.

To taub dab tsi nto finishing yog dab tsi thiab yog vim li cas nws tseem ceeb mus dhau qhov kev kawm xav paub. Thaum cov engineers xaiv qhov zoo ntawm qhov chaw tiav qhov tshwj xeeb thaum ntxov ntawm cov qauv tsim, lawv tsis txhob raug nqi rov ua dua, txo cov nqi seem, thiab xyuas kom meej tias cov khoom ua tau raws li qhov yuav tsum tau ua thiab kev zoo nkauj los ntawm thawj qhov kev tsim khoom. Qhov no yog qhov tseeb tshwj xeeb tshaj yog nyob rau hauv kev lag luam xws li pwm ua thiab txhaj tshuaj molding, qhov chaw tiav ntawm pwm kab noj hniav hloov mus rau txhua qhov yas uas tsim los ntawm nws.

Peb Cheebtsam uas txhais tau tias Deg tiav

Nto tiav tsis yog ib tus cwj pwm nkaus xwb tab sis peb qhov sib txawv ua haujlwm ua ke. Kev nkag siab txhua yam yuav pab cov tuam txhab lag luam qhia meej thiab ua tiav qhov zoo rau lawv daim ntawv thov.

Roughnesssawv cev rau qhov tsawg tshaj plaws irregularities ntawm ib qhov chaw. Cov microscopic peaks thiab kwj ha, ntsuas perpendicular mus rau nteg kev taw qhia, feem ntau yog nyob ntawm submicron qib mus rau ob peb micrometers. Lub profileometer taug qab cov kev hloov pauv no los tsim cov txiaj ntsig roughness. Qhov feem ntau parameter, Ra, nruab nrab txhua qhov siab sib txawv ntawm cov kab nruab nrab ntawm qhov ntsuas qhov ntev. Rau precision bearings nyob rau hauv aerospace daim ntaub ntawv, roughness yuav tsum nyob rau hauv 0.1 mus rau 0.4 micrometers Ra los xyuas kom meej kev ua tau zoo.

Wavinesspiav qhia dav dav, ntau qhov sib txawv ntawm qhov chaw sib txawv. Cov imperfections lub sij hawm no yog loj dua roughness sampling lengths tab sis me dua tag nrho flatness defects. Waviness feem ntau tshwm sim los ntawm kev vibrations thaum lub sij hawm machining, cov khoom deflection nyob rau hauv txiav quab yuam, los yog thermal warping los ntawm cua sov thiab cua txias mus. Txawm hais tias tsawg dua qhov kev ntxhib los mos hauv ntau daim ntawv thov, ntau dhau waviness tuaj yeem cuam tshuam qhov chaw sib khi thiab thauj khoom- muaj peev xwm ua tau.

Layqhia txog cov qauv kev coj ua ntawm qhov chaw. Cov txheej txheem tsim khoom ib txwm tsim cov qauv kev taw qhia- tig ua cov voj voog, milling tsim cov qauv sib npaug lossis sib tsoo, thiab kev sib tsoo feem ntau ua rau cov kab sib txuas. Lay kev taw qhia tseem ceeb heev rau kev ua haujlwm tribological. Ib tug nto nrog perpendicular nteg mus rau cov kev taw qhia ntawm cov lus tsa suab muaj kev sib txawv kev sib txhuam thiab hnav cov yam ntxwv dua li ib tug uas parallel lay.

Qhov Nto Roughness ntsuas li cas

Niaj hnub nimno metrology siv ob txoj hauv kev: kev sib cuag thiab tsis yog - txoj kev sib cuag. Txhua qhov ua haujlwm tshwj xeeb ntsuas qhov xav tau nrog qhov zoo sib xws.

Kev ntsuas kev sib cuag siv lub stylus profileometer, qhov twg lub pob zeb diamond-tipped sojntsuam lub cev taug qab hla ntawm qhov chaw. Lub stylus caij hla lub ncov thiab hav, nrog nws txoj kab ntsug hloov mus rau hauv cov cim hluav taws xob. Cov cuab yeej no ntsuas roughness nrog cov neeg siab, feem ntau nyob rau hauv 0.01 micrometers, ua rau lawv tus qauv rau kev tswj kom zoo hauv kev tsim khoom. Cov txheej txheem ntsuas yuav siv sij hawm vib nas this thiab muab cov txiaj ntsig tam sim rau Ra, Rz, thiab lwm yam.

Tsis yog-txoj kev sib cuag muaj xws li optical interferometry, confocal microscopy, thiab tsom variation cov tswv yim. Cov tshuab no siv lub teeb es tsis yog kev sib cuag ntawm lub cev, ua rau lawv zoo tagnrho rau qhov chaw mos, cov ntaub ntawv mos, lossis qhov chaw uas yuav tsum tau zam. Txoj kev kho qhov muag tuaj yeem tshawb xyuas tag nrho cov cheeb tsam es tsis yog ib kab, muab peb - daim duab qhia qhov chaw. Txawm li cas los xij, lawv feem ntau raug nqi ntau dua li hu rau profileometers thiab yuav tsum tau ua tib zoo teeb tsa kom ua tiav cov txiaj ntsig raug.

Key Roughness Parameters

Ratseem yog qhov kev qhia dav dav tshaj plaws thoob ntiaj teb. Nws suav cov zauv nruab nrab ntawm qhov sib txawv ntawm cov kab nruab nrab: Ra=(1/L) ∫|z(x)|dx los ntawm 0 mus rau L. Cov mis no tsim ib tus lej uas sawv cev rau tag nrho saum npoo av. Ib qhov chaw nrog Ra=3.2 micrometers- qhov raug machined tiav- muaj qhov nruab nrab ncov - mus rau - hav variation ntawm 3.2 micrometers nyob rau hauv lub sampling ntev.

Rz muab qhov kev xav sib txawv los ntawm kev ntsuas qhov nruab nrab ntawm qhov nruab nrab ntawm tsib lub siab tshaj plaws thiab tsib qhov tob tshaj plaws hauv qhov ntsuas qhov ntev. Tsis zoo li Ra, uas qhov nruab nrab ntawm tag nrho cov ntaub ntawv cov ntsiab lus, Rz qhia txog qhov txawv txav. Ob qhov chaw nrog cov txiaj ntsig Ra zoo ib yam tuaj yeem muaj qhov sib txawv Rz ntsuas yog tias ib qho muaj qee zaus khawb tob lossis siab siab. Hloov ntawm Ra thiab Rz yuav tsum tau ceev faj; Qhov kev kwv yees ntxhib qhia tias Rz sib npaug Ra muab 5 rau 7, tab sis qhov no txawv txav raws li cov yam ntxwv saum npoo.

Standard Surface Finish Values ​​thoob plaws kev lag luam

Cov txheej txheem tsim ua tiav qib sib txawv ntawm qhov sib txawv raws li lawv qhov xwm txheej thiab cov cuab yeej siv. Kev nkag siab txog cov kab no pab cov engineers xaiv cov txheej txheem tsim nyog thiab qhia cov kev xav tau tiag tiag.

Cov txheej txheem tsim roughest muaj xws li nplaim taws txiav (50 txog 200 micrometers Ra) thiab kub dov (12.5 txog 25 micrometers Ra). Cov no tsim cov chaw ua haujlwm tab sis tsis muaj qhov tseeb lossis smoothness. Xuab zeb casting yields 6.3 mus rau 25 micrometers Ra, haum rau tsis yog - cov khoom tseem ceeb uas qhov tsos tseem ceeb me ntsis.

Cov txheej txheem Machining muaj qhov nruab nrab - qhov ua tiav. Roughmilling thiab tigFeem ntau ua tiav 3.2 txog 6.3 micrometers Ra- lub neej ntawd ua tiav rau ntau yam haujlwm CNC. Qhov roughness no tseem pom ntawm qhov muag liab qab tab sis ua pov thawj pom zoo rau feem ntau cov kev siv tshuab. Kev ua haujlwm zoo nrog cov cuab yeej ntse thiab qhov ntsuas tsis zoo tuaj yeem ncav cuag 0.8 mus rau 1.6 micrometers Ra, ua kom zoo dua qhov chaw tsim nyog rau nruab nrab - qhov yuav tsum tau muaj tseeb.

Kev sib tsoo tawg rau hauv qhov ntau, xa tawm 0.2 txog 0.8 micrometers Ra nyob ntawm kev xaiv lub log thiab kev sib tsoo.Cylindrical thiab nto sib tsoo ua haujlwmtsis tu ncua ua tiav cov tiav ntawm cov khoom siv tawv tawv. Rau cov txiaj ntsig zoo dua, honing tsim 0.1 txog 0.4 micrometers Ra los ntawm kev tswj cov pob zeb abrasive.

Cov txheej txheem tsim khoom zoo tshaj plaws suav nrog lapping thiab superfinishing. Lapping nrog nplua abrasive slurries ua tiav 0.025 mus rau 0.1 micrometers Ra, tsim daim iav-zoo li qhov chaw. Cov txheej txheem superfinishing tuaj yeem ncav cuag qis dua 0.02 micrometers Ra, txawm hais tias qhov kev ua haujlwm zoo li no tsuas yog siv tshwj xeeb xws li precision optics lossis siab -kev ua haujlwm bearings.

Lub 2024-2025 kev kho mob saum npoo kev lag luam, muaj nuj nqis ntawm $ 13.5 nphom thoob ntiaj teb thiab loj hlob ntawm 4.5% txhua xyoo, qhia txog kev xav tau ntau ntxiv rau kev ua tiav saum npoo av thoob plaws.Automotive thiab aerospace sectors. Qhov kev loj hlob no yog ib feem los ntawm cov kev cai nruj dua nyob ib puag ncig PFAS chemicals thiab nce kev tsom mus rau cov txheej txheem ua tiav ib puag ncig.

Lub luag haujlwm tseem ceeb ntawm Nto tiav hauv cov khoom ua tau zoo

Cov yam ntxwv ntawm qhov chaw txiav txim siab seb cov khoom siv cuam tshuam li cas nrog lawv ib puag ncig thiab lwm qhov chaw. Kev qhia txog qhov ua tiav tsis raug tuaj yeem ua rau ua tsis tiav ntxov, nce nqi kho, lossis tsim khoom pov tseg.

Kev sib txhuam thiab hnav tswj

Nto roughness ncaj qha cuam tshuam rau kev sib txhuam coefficients ntawm zawv zawg qhov chaw. Smoother nto feem ntau tsim kev sib txhuam qis, tab sis kev sib raug zoo tsis yog linear. Ib tug du nto tuaj yeem ua rau muaj kev sib txhuam los ntawm cov hlau ntau dhau - mus rau - hlau kov. Qhov zoo tshaj plaws roughness muab cov kwj me me uas khaws cov roj nplua nyeem thaum ua kom lub ncov qis txaus los tiv thaiv kev sib cuag hlau. Pob bearings, piv txwv li, yuav tsum muaj kev sib tw roughness ntawm 0.1 thiab 0.25 micrometers Ra kom sib npaug cov kev sib tw.

Hnav cov qauv nyob ntawm ntau yam ntawm qhov chaw tiav. Cov nplaim ntxhib hnav sai dua thaum lub ncov tau tsoo, tab sis tom qab ntawd tuaj yeem ncav cuag qhov xwm txheej ruaj khov. Qhov chaw du heev tuaj yeem ua rau khaus lossis txeeb tau hauv siab -load daim ntawv thov vim tsis muaj qhov ntxhib txaus los rhuav tshem cov nplaum nplaum. Kev lag luam aerospace qhia txog qhov ua tiav ntawm qhov chaw tsaws iav ntawm 0.4 thiab 1.6 micrometers Ra, muab kev hnav tsis kam thaum tswj cov qib kev sib txhuam.

Sealing thiab tiv thaiv dej

Gasket interfaces yuav tsum tau ua tib zoo saib xyuas qhov ua tiav. Kev ntxhib dhau, thiab cov dej ntws tawm ntawm cov khoom siv gasket; du heev, thiab lub gasket tsis tuaj yeem ua raws li cov kab mob microscopic. Feem ntau cov ntawv thov gasket qhia meej 1.6 txog 3.2 micrometers Ra raws li kev pom zoo. Hydraulic lub tog raj kheej bores feem ntau xav tau 0.4 mus rau 0.8 micrometers Ra los tiv thaiv kev puas tsuaj thaum tuav cov roj zaj duab xis kom zoo.

O-ntiv nplhaib sealing nto ua qauv qhia meej. Qhov saum npoo rougher tshaj 1.6 micrometers Ra tuaj yeem txiav lossis abrade lub elastomer, txo lub neej foob. Hloov pauv, qhov chaw smoother tshaj 0.4 micrometers Ra tej zaum yuav dhau slick rau o-ntiv nplhaib kom tuav tau zoo thaum muaj kev kub ntxhov. Qhov chaw qab zib ntawm 0.8 txog 1.2 micrometers Ra sib npaug cov kev xav tau no.

Txheej thiab Plating Adhesion

Xim, hmoov txheej, thiab plating txheej txheem yuav tsum tau tshwj xeeb nto roughness rau pom adhesion. Cov ntaub ntawv txheej yuav tsum tau microscopic ncov thiab kwj deg los tuav mechanically. Cov khoom npaj rau cov hmoov txheej feem ntau yog lub hom phiaj 3.2 txog 6.3 micrometers Ra- du txaus rau qhov zoo nkauj tab sis ntxhib txaus rau txheej adhesion.

Electroplating nthuav qhia cov kev xav tau sib txawv. Lub hauv paus hlau nto yuav tsum polished rau 0.4 mus rau 0.8 micrometers Ra ua ntej plating. Qhov smoothness no ua kom cov txheej txheej plated ua rau qhov tsis sib xws ntawm qhov sib npaug, ua kom muaj qhov sib xws, tsis xws luag - txheej dawb. Chrome plating rau aerospace Cheebtsam xav tau lub hauv paus nto tiav hauv qab 0.4 micrometers Ra kom tau raws li cov qauv nruj.

Corrosion Resistance

Rougher nto tuav ntau noo noo thiab paug nyob rau hauv lawv kwj, accelerating corrosion. Passivation efficiency ntawm stainless hlau txhim kho dramatically nrog smoother finishes. Qhov chaw nrog 0.8 micrometers Ra lossis zoo dua cov txheej txheem passive oxide ntau dua li cov uas muaj 3.2 micrometers Ra tiav.

Cov ntawv thov dej hiav txwv qhia txog txoj cai no. Nkoj nkoj nto pib nrog kev ua tiav zoo (1.6 txog 3.2 micrometers Ra) kom txo qis qis thiab pib corrosion. Txawm hais tias cov kev pabcuam erode no tiav sai, pib du txuas ntxiv lub sijhawm ua ntej corrosion yuav teeb meem.

Surface Finish Standards thiab Symbols

Cov engineers sib txuas lus cov kev xav tau saum npoo los ntawm cov cim cim thiab cov cim ntawm kev kos duab. Ob tus qauv tseem ceeb yog: ASME (Asmeskas) thiab ISO (International).

ASME Y14.36M Txuj

CovASME Y14.36Mtus qauv tswj hwm cov cim kev ntxhib los mos hauv North America. Lub cim tseem ceeb zoo li lub cim kos nrog lub ntsiab lus kov lub ntsej muag uas xav tau tshwj xeeb. Tus lej muaj nuj nqis thiab cov ntaub ntawv ntxiv tshwm nyob rau hauv qhov chaw nyob ib ncig ntawm lub cim no.

Txoj hauj lwm "a" qhia txog tus nqi roughness (feem ntau Ra) hauv micrometers lossis microinches. Txoj hauj lwm "b" tuaj yeem qhia txog cov txheej txheem tsim khoom, txheej txheej, lossis lwm cov ntawv sau. Txoj hauj lwm "c" qhia qhov roughness sampling ntev. Txoj hauj lwm "d" qhia nteg cov kev taw qhia uas siv cov cim qauv:=rau qhov sib npaug, ⊥ rau perpendicular, X rau hla, M rau multidirectional, C rau ncig, thiab R rau cov qauv radial.

Lub cim siab heev yuav nyeem tau: Ra 1.6 / 0.8, qhia qhov siab tshaj plaws ntawm 1.6 micrometers thiab yam tsawg kawg nkaus ntawm 0.8 micrometers. Qhov kev qhia tshwj xeeb no txwv tsis pub dhau - ua tiav, uas nkim sijhawm thiab nyiaj txiag.

ISO 1302: 2002 Txuj

Tus txheej txheem ISO muab kev ua haujlwm zoo sib xws nrog kev hloov pauv me ntsis hauv cov cim pom thiab qhov tsis zoo. ISO siv tib lub cim kos cim yooj yim tab sis hais txog kev txhais lus txawv. Thaum tsis muaj qhov ntsuas tau teev tseg, ISO xav tias Ra ntsuas, thaum cov duab qub yuav siv Rz raws li lub neej ntawd.

ISO 21920-1: 2021tau hloov pauv tus qauv xyoo 2002, qhia txog kev ua kom zoo dua qub thiab cov ntsuas ntsuas niaj hnub no. Txawm li cas los xij, ntau cov duab kos uas twb muaj lawm tseem hais txog tus qauv qub, xav kom engineers to taub ob lub tshuab.

Cov Khoom Siv Tshem Tawm Specifications

Cov cim saum npoo tuaj yeem suav nrog cov khoom siv tshem tawm. Lub cim nrog lub voj voog ntawm lub vertex qhia tias kev tshem tawm cov khoom raug txwv tsis pub- saum npoo yuav tsum tuav nws li - tsim khoom. Kab rov tav bar saum lub cim qhia tias yuav tsum tau tshem tawm cov khoom, feem ntau los ntawm machining. Tsis muaj ntxiv rau cov cim tseem ceeb txhais tau hais tias tshem tawm cov khoom siv yog xaiv tau.

Nto Finishing txheej txheem thiab cov txheej txheem

Ua kom tiav qhov chaw tiav yuav tsum xaiv cov txheej txheem tsim khoom tsim nyog thiab ua tiav. Txhua txoj kev haum rau ntau hom khoom, geometries, thiab lub hom phiaj roughness qhov tseem ceeb.

Mechanical Finishing

Sib tsoo siv rotating abrasive log kom tshem tawm cov khoom thiab du nto. Txoj siv sib tsoo ua pov thawj zoo rau qhov chaw tiaj tus los yog maj mam nkhaus, thaum cylindrical sib tsoo tuav cov ncej thiab bores. Kev sib tsoo ua tiav 0.2 txog 1.6 micrometers Ra nyob ntawm lub log grit, ceev, thiab pub tus nqi. Silicon carbide thiab aluminium oxide lub log ua haujlwm feem ntau, thaum lub pob zeb diamond thiab CBN (cubic boron nitride) log tuav cov ntaub ntawv nyuaj heev.

Honing txhim kho kev sib tsoo los ntawm kev siv cov pob zeb abrasive tswj hauv ib qho qauv tshwj xeeb. Hydraulic cylinders, cav lub tog raj kheej bores, thiab bearing haiv neeg feem ntau undergo honing mus cuag 0.1 mus rau 0.8 micrometers Ra nrog meej crosshatch qauv. Cov txheej txheem tshem tawm cov khoom me me thaum kho ob qho tib si geometry thiab nto tiav.

Lapping tsim cov txheej txheem zoo tshaj plaws los ntawm xoob abrasive slurry ntawm cov khoom ua haujlwm thiab cov cuab yeej muag muag. Pob zeb diamond muab tshuaj txhuam los yog lwm yam zoo abrasives raug tshem tawm hauv cov roj ntws ntawm qhov chaw thaum lawv txav mus rau ib leeg. Lapping nce mus txog 0.025 txog 0.1 micrometers Ra tab sis tseem lub sijhawm -siv thiab kev txawj ntse- hnyav. Gauge blocks, optical flats, thiab precision sealing qhov chaw pom zoo rau lapping tus nqi los ntawm lawv cov kev xav tau loj.

Cov txheej txheem tshuaj thiab Electrochemical

Electropolishing tshem tawm cov khoom los ntawm anodic dissolution nyob rau hauv ib da dej electrolyte. Hluav taws xob tam sim no nyiam tawm tsam qhov chaw siab tshaj plaws, ua kom lub ntsej muag zoo nkauj thaum tshem tawm cov txheej nyias nyias. Stainless hlau, txhuas, thiab titanium Cheebtsam tau txais txiaj ntsig los ntawm electropolishing, uas ua tiav 0.1 txog 0.4 micrometers Ra thaum tib lub sijhawm txhim kho corrosion kuj.Kev kho mob cog thiab cov khoom siv tshuajtsis tu ncua qhia qhov chaw electropolished rau lawv cov khoom tu cev.

Tshuaj etching siv acidic los yog alkaline daws rau yaj cov khoom nto. Tsis zoo li electropolishing, tshuaj etching tsis xav tau hluav taws xob tam sim no tab sis muaj kev tswj tsawg dua. Cov txheej txheem roughens nto nyob rau hauv ib txoj kev tswj, ua rau nws muaj txiaj ntsig zoo rau kev npaj cov chaw rau cov nplaum nplaum los yog txheej txheej ntau dua li smoothing lawv.

Abrasive Media Txheej txheem

Vibratory finishing qhov chaw nyob rau hauv lub vibrating lub tais ntim nrog ceramic, yas, los yog hlau xov xwm. Cov xov xwm cascades hla qhov chaw, abrading siab me ntsis thiab maj mam smoothing nto. Cov txheej txheem batch no tswj cov khoom lag luam loj, ua tiav 0.4 txog 3.2 micrometers Ra nyob ntawm kev xaiv xov xwm thiab lub sijhawm ua haujlwm. Vibratory finishing kuj deburrs ntug ib txhij.

Sandblasting thiab hlaws blasting propel abrasive hais ntawm qhov chaw siv cua compressed. Tsis zoo li cov txheej txheem smoothing, cov roughen nto rau 3.2 txog 12.5 micrometers Ra. Cov ntawv thov suav nrog kev npaj nto rau kev pleev xim, tsim cov matte kho kom zoo nkauj tiav, thiab tshem tawm cov oxides lossis cov kab mob. Cov iav hlaws blasting ua rau ntau yam sib xws, tsis tshua muaj kev ntxhib los mos dua li aluminium oxide lossis silicon carbide blasting.

Thermal thiab txheej txheej txheem

Anodizing hloov kho aluminium thiab titanium nto los ntawm electrochemical oxidation, tsim ib txheej ntxeem tau oxide. Cov txheej txheem me ntsis roughens nto- feem ntau nce Ra los ntawm 0.1 txog 0.3 micrometers-thaum txhim kho corrosion thiab hnav tsis kam. Aerospace Cheebtsam vam khom hnyav rau anodizing rau nws kev sib xyaw ua ke ntawm kev tiv thaiv thiab kev ua haujlwm hnyav.

Electroplating deposits hlau coatings uas yuav du los yog roughen nyob ntawm lub hauv paus nto npaj thiab plating thickness. Chrome plating feem ntau txo qhov roughness ntawm 20 mus rau 30% piv rau lub hauv paus hlau, raws li cov chrome deposited nyob rau hauv microscopic hav. Nickel plating coj zoo ib yam, txawm hais tias nws tsis tshua muaj txiaj ntsig ntawm smoothing ntxhib heev.

Nto tiav hauv Txhaj Moulding: SPI thiab VDI Standards

Hauvyas txhaj tshuaj molding, lub tswv yim ntawm nto tiav yuav siv sij hawm nyob rau hauv ib tug tshwj xeeb dimension. Tsis zoo li CNC machining lossis 3D luam ntawv, qhov chaw ua tiav txheej txheem tshwm sim tom qab ua tiav, kev txhaj tshuaj molding ua tiav rau hauv pwm nws tus kheej. Cov pwm kab noj hniav saum npoo yog polished lossis textured rau ib qib tshwj xeeb, thiab txhua qhov molded replicates qhov kev ntxhib los mos thoob plaws lub cuab yeej lub neej. Qhov no txhais tau tias cov txheej txheem ua tiav yuav tsum tau muab xauv rau hauv lub sijhawm tsim pwm-tsis raug kho raws li qhov xav tau.

Kev lag luam plastics tso siab rau ob lub hauv paus kev faib tawm rau kev txheeb xyuas cov pwm tiav. Tus qauv SPI (Lub Zej Zog ntawm Kev Lag Luam Plastics) faib ua tiav rau plaub qib -A (glossy), B (semi-glossy), C (matte), thiab D (textured)-nrog peb theem nyob rau hauv txhua qib, tsim kaum ob qhov sib txawv ntawm qhov tiav hauv tag nrho. A-1 ua tiav siv pob zeb diamond buffing kom ua tiav daim iav-zoo li qhov chaw nrog Ra qhov muaj nuj nqis qis li 0.012 micrometers, haum rau cov lo ntsiab muag kho qhov muag thiab pob tshab. B- qib tiav nyob rau ntawm grit sandpaper polishing rau cov neeg siv khoom siv hluav taws xob vaj tsev. C-qib pob zeb- polished tiav zais cov kab ntws thiab cov cim dab dej, thaum D-qib qhuav-blasted textures txhim kho tuav thiab npog me me molding imperfections.

Tus qauv VDI 3400, tsim los ntawm German Engineering Association, siv txoj hauv kev sib txawv los ntawm kev txhais 46 qib kev ntxhib los mos ua tiav los ntawmHluav taws xob tawm Machining (EDM). Feem ntau siv cov qib ntawm VDI 12 (zoo matte) rau VDI 45 (ntxhiab ntxhib ntxhib ntxhib ntxhib los mos), nrog rau txhua qib sib raug rau tus nqi Ra. Tsis zoo li SPI, VDI qib tsis suav nrog daim iav- polishing tiav- txhua qhov VDI textures yog matte rau qee qhov kev kawm.

Xaiv cov qib kawm tiav yuav tsum ntsuas ntau yam. Tus cwj pwm ntawm cov khoom ua si lub luag haujlwm tseem ceeb:amorphous polymers zoo li ABS thiab polycarbonatereproduce siab -gloss A- qib ua tiav zoo, thaum semi-crystalline resins xws li polypropylene tawm tsam nrog glossy replication vim muaj ntau dua shrinkage. Textured finishes (SPI D-qib los yog VDI 30 thiab siab dua) thov kom muaj zog cov duab los tiv thaiv cov cim thaum lub sij hawm ejection-feem ntau 1.5 degrees ntawm cov cua ntsawj ntshab ntxiv rau txhua txhua 0.025 mm ntawm kev ntxhib los mos qhov tob.

Ntawm ABIS Pwm, peb ua haujlwm nrog cov neeg siv khoom los txiav txim siab qhov zoo tshaj plaws ntawm qhov chaw tiav ua ntej txiav cov hlau. Txawm hais tias koj qhov phiaj xwm hu rau qhov siab -gloss A-1 polish rau cov ntim tshuaj pleev ib ce lossis kev ua haujlwm VDI 24 kev ntxhib los mos rau lub ntsej muag ergonomic, peb pab neeg ua haujlwm engineering tuaj yeem qhia txog cov khoom siv sib xws, cov qauv tsim, thiab cov nqi lag luam tawm. Yog tias koj tsis paub tseeb tias qhov twg nto tiav hom zoo tshaj plaws haum rau koj daim ntawv thov,tiv tauj peb pab neegrau kev tshuaj xyuas DFM pub dawb-ua kom tiav txoj cai ntawm lub pwm tsim theem txuag lub sij hawm tseem ceeb thiab cov cuab yeej siv tau nqes hauv kab.

Nto tiav hauv Hlau Txhaj Molding

Hlau Txhaj Moulding (MIM) tsim cov khoom siv tshwj xeeb los ntawm kev txhaj tshuaj hlau hmoov khoom noj rau hauv pwm, tom qab ntawd debinding thiab sintering. Qhov tshwm sim feem ntau pom qhov roughness nyob ib ncig ntawm 0.8 micrometers Ra nyob rau hauv raws li -sintered mob, smoother dua li cov pa hmoov metallurgy tab sis rougher dua precision machining.

Raws li - molded MIM cov khoom qee zaus ua tau raws li qhov xav tau kawg yam tsis muaj kev ua tiav ntxiv, tshwj xeeb tshaj yog rau cov yam ntxwv sab hauv lossis tsis yog - qhov chaw tseem ceeb. Txawm li cas los xij, pom qhov chaw, mating ntsej muag, los yog qhov chaw precision feem ntau xav tau kev ua haujlwm thib ob. Gate marks, parting lines, thiab ejector pin marks yuav tsum tau tshem tawm los ntawm kev ua kom tiav.

MIM qhov chaw ncav cuag 97% lossis siab dua ua haujlwm tau zoo rau feem ntau cov txheej txheem tiav. Vibratory finishing tshem tawm me me deg imperfections thiab tsim uniform matte tiav. Rau cov kev xav tau zoo dua, kev sib tsoo lossis polishing tuaj yeem ua tiav 0.4 micrometers Ra lossis zoo dua. Qhov siab ceev ntawm sintered MIM Cheebtsam tso cai rau lawv txais electroplating, txheej, thiab kev kho cua sov zoo ib yam li cov hlau wrought.

Cov tshuaj kho qhov chaw ua haujlwm tshwj xeeb zoo nrog MIM stainless hlau. Passivation tsim kev tiv thaiv oxide txheej, txhim khu kev tiv thaiv corrosion tshaj li -sintered zog. Cov khoom tseem tuaj yeem raug anodizing (rau MIM titanium lossis txhuas) lossis phosphate txheej (rau MIM steels) nyob ntawm daim ntawv thov.

Qhov ze ntawm -net-zoo li ntawm MIM txo qis cov kev xav tau tshem tawm, ua rau nws raug nqi- siv tau rau cov geometry nyuaj uas xav tau ntau qhov chaw tiav. Ib feem ntawm MIM tuaj yeem sib xyaw ua ke raws li -moulded nto (qhov chaw ua haujlwm tau tso cai) nrog cov yam ntxwv tshwj xeeb polished-ib txoj hauv kev ua tsis tau zoo nrog kev ua haujlwm ib txwm muaj.

Cov ntawv thov xav tau qhov tshwj xeeb nto tiav

Cov kev lag luam sib txawv tsim cov kev xav tau saum npoo av raws li kev ua haujlwm, kev ua haujlwm ib puag ncig, thiab kev cia siab rau kev ua haujlwm.

Aerospace Components

Lub dav hlau sab nrauv yuav tsum roughness qis dua 0.5 micrometers Ra kom txo qis aerodynamic luag. Txhua micro-inch ntawm roughness nce kev sib txhuam, txo cov roj efficiency ntawm lub davhlau ntev. Turbine blades undergo txhaj peening los tsim compressive nto kev nyuaj siab, ces polishing rau 0.2 micrometers Ra kom txo tau qaug zog tawg pib thaum tswj peening cov txiaj ntsig.

Kev tsaws iav Cheebtsam piv txwv qhov sib npaug ntawm hnav tsis kam thiab smoothness. Chrome-plated struts tuav 0.4 mus rau 1.6 micrometers Ra tiav los tiv thaiv corrosion thaum cia hydraulic seals ua haujlwm zoo. Gear hniav flanks nyob rau hauv aerospace kis tau tus mob superfinishing rau hauv qab no 0.2 micrometers Ra, ncua kev pab cuam lub neej los ntawm kev txo kev qaug zog thiab micropitting.

Tshaj li ib tus neeg cov khoom, lub aerospace nto tiav toj roob hauv pes yog zoo li lub web complex ntawm proprietary thiab thoob ntiaj teb specifications. Cov OEMs loj xws li Boeing thiab Airbus tswj hwm lawv tus kheej cov qauv kev ua tiav saum npoo-Piv txwv li, Boeing's PS551170, txhais cov kev xav tau roughness rau machined nto thoob plaws thaj chaw ua haujlwm sib txawv. Ib qho kev ua tiav tag nrho ntawm Ra 3.2 micrometers tuaj yeem npog tsis yog - qhov chaw tseem ceeb, thaum sib txuas sib txuas thiab hydraulic bore nto tau txais ib tus neeg hu xov tooj nruj li Ra 0.1 txog 0.2 micrometers. Aerospace engineers tseem yuav tsum xav txog tias qhov kev xav tau saum npoo av feem ntau siv rau qhov ua ntej - kev kho mob: yog tias daim duab qhia Ra 0.8 ntawm qhov chaw anodized, qhov ntsuas yuav tsum tau ua ua ntej txheej txheem anodizing, txij li txheej oxide hloov cov txheej txheem qub.

Qhov txheej txheem txheej txheem no rau aerospace nto tiav specification piav qhia txog vim li cas cov txheej txheem ua tiav hauv qhov haujlwm no siv qhov tsis sib xws ntawm lub sijhawm tsim khoom- qee qhov kev kwv yees hais tias kev ua tiav tiav rau 30% lossis ntau dua ntawm tag nrho cov sijhawm ua haujlwm ntawm lub davhlau- cov qauv tseem ceeb. Rau cov pwm thiab cov khoom siv tuag siv hauv aerospace composite layup tooling, qhov kawg ntawm lub ntsej muag lub ntsej muag cuam tshuam ncaj qha rau qhov zoo ntawm cov khoom tiav tiav, ua precision polishing yog ib qho tseem ceeb hauv cov cuab yeej ua haujlwm.

Automotive Precision qhov chaw

Cav lub tog raj kheej bores qhia tau hais tias sophisticated nto tiav yuav tsum tau. Plateau honing tsim ib tug dual - textured nto: tob kwj ha (ib ncig ntawm 6.3 micrometers Rz) khaws cov roj, thaum lub tiaj tiaj tiaj (0.4 mus rau 0.8 micrometers Ra) muab cov kabmob nto rau piston rings. Qhov kev sib xyaw ua ke no txo ​​qis kev sib txhuam thiab kev siv roj thaum tswj kev hnav tsis kam.

Cov roj txhaj tshuaj ua haujlwm ntawm qhov kub siab heev, yuav tsum tau 0.2 txog 0.4 micrometers Ra ntawm qhov chaw sib khi kom tiv thaiv kom tsis txhob tawg. Ib yam li ntawd, hydraulic nres Cheebtsam xav tau 0.4 mus rau 0.8 micrometers Ra ntawm lub piston bores thiab foob qhov chaw los xyuas kom meej teb braking yam tsis muaj dej to.

Cov cuab yeej kho mob

Cov khoom siv cog qoob loo xav tau daim iav tiav rau kev lom zem sib xws. Lub duav thiab lub hauv caug implants feem ntau hais txog 0.1 txog 0.2 micrometers Ra ntawm qhov chaw sib txuas kom txo qis cov khoom tsim, uas tuaj yeem ua rau cov lus teb inflammatory. Cov cuab yeej phais yuav tsum tau ua kom tiav zoo sib xws rau kev huv huv- cov chaw ntxhib hauv cov kab mob hauv cov microscopic crevices txawm tias siv zog ua kom tsis muaj menyuam.

Electronics thiab Semiconductors

Silicon wafer polishing ua tiav sub-nanometer roughness (hauv qab 0.001 micrometers Ra) rau microchip fabrication. Cov neeg sib txuas lus xav tau 0.1 txog 0.4 micrometers Ra kom ntseeg tau tias cov hluav taws xob ua tau zoo nrog kev tiv thaiv tsawg heev. Rougher tiav ua rau muaj kev tiv thaiv thiab muaj peev xwm ua rau muaj kev sib cuam tshuam.

Tus nqi cuam tshuam thiab kev xav txog nyiaj txiag

Cov kev xav tau ntawm qhov chaw tiav ncaj qha cuam tshuam cov nqi tsim khoom los ntawm lub sijhawm ua, cov khoom xav tau, thiab cov nqi seem. Kev nkag siab txog cov kev sib raug zoo no pab cov engineers qhia cov kev ua tiav tiav yam tsis muaj dhau - engineering.

Ua kom tiav cov txheej txheem machined tiav (3.2 micrometers Ra) tus nqi pib tus nqi, raws li qhov roughness no tshwm sim los ntawm kev txiav tsis raug. Kev txhim kho rau 1.6 micrometers Ra tuaj yeem nce tus nqi los ntawm 20 mus rau 30% los ntawm kev pub qeeb qeeb, kev hla ntxiv, lossis cov cuab yeej zoo dua. Mus txog 0.8 micrometers Ra tuaj yeem ua tiav ob npaug ntawm cov nqi, vim nws feem ntau xav tau kev sib tsoo lossis kev ua haujlwm tiav.

Ultra- du tiav (qis dua 0.2 micrometers Ra) tuaj yeem muab cov nqi sib npaug los ntawm 5 mus rau 10 npaug piv rau cov qauv machining. Cov khoom tiav no xav tau cov cuab yeej tshwj xeeb, cov neeg ua haujlwm txawj, thiab ntau cov kauj ruam ua. Ib feem uas xav tau 0.05 micrometers Ra thoob plaws thaj chaw loj tuaj yeem ua pov thawj ob peb teev ntawm tes lapping - kev lag luam tsuas yog siv tau rau cov ntawv thov tseem ceeb.

"Golden txoj cai" ntawm qhov chaw tiav qhov tshwj xeeb hais tias: xaiv qhov roughest tiav uas txaus siab rau kev ua haujlwm. Qhia meej 0.8 micrometers Ra thaum 1.6 micrometers Ra yuav ua haujlwm sib npaug zoo nkim nyiaj yam tsis tau txhim kho kev ua haujlwm. Hloov pauv, kev ua tiav tsis tiav tuaj yeem ua rau kev ua haujlwm tsis tiav, kev lees paub kev lees paub, thiab kev puas tsuaj rau lub tuam txhab lub koob npe nrov- tus nqi ntau tshaj qhov kev txuag nyiaj los ntawm cov lus qhia xoob.

Kev tsim cov txheej txheem muaj peev xwm yuav tsum ua raws li cov lus qhia tshwj xeeb. Lub khw nruab rau cov txheej txheem machining tsis tuaj yeem tsim cov khoom lag luam uas xav tau 0.2 micrometers Ra tiav-lawv yuav ua haujlwm sib tsoo, ntxiv cov nqi thiab sijhawm ua haujlwm. Kev sib koom ua ke thaum ntxov ntawm cov kws tsim qauv tsim thiab cov kws tsim khoom tshwj xeeb tiv thaiv cov ntsiab lus ntawm kev sib xyaw ua ke tsis zoo.

Common Surface Finish Teeb meem thiab kev daws teeb meem

Manufacturing defects thiab ntsuas inconsistencies nyuaj ua kom tiav cov hom phiaj tas li. Paub txog cov teeb meem ib txwm ua kom daws teeb meem sai.

Chatter Marks

Machining vibration tsim cov qauv nthwv dej tsis tu ncua superimposed ntawm lub hom phiaj roughness. Cov no tshwm sim raws li ripples pom ntawm qhov muag liab qab thiab ua rau nce qhov ntsuas Ra thiab Rz qhov tseem ceeb. Cov kev daws teeb meem suav nrog kev ua kom cov cuab yeej ua kom nruj, txo qhov tob ntawm kev txiav, ua kom zoo dua spindle ceev kom tsis txhob muaj cov resonant zaus, thiab siv cov cuab yeej vibration damping.

Feed Marks

Tig thiab milling kev ua haujlwm ib txwm tsim cov cim pub khoom noj - ntu ntu raws li cov cuab yeej siv. Pub cov cim tshwm raws li pom kauv los yog kab sib txuas txawm tias ntsib Ra specifications. Txo tus nqi noj lossis siv lub wiper ntxig (txoj kev txiav ntug uas ua kom lub ntsej muag zoo nkauj) tshem tawm cov cim no yam tsis hloov qhov nruab nrab roughness loj.

Nto Cov Kab Mob

Roj, chips, los yog tuav cov av skew nto tiav ntsuas. Lub profileometer stylus caij hla cov hlau nti sau cov nti qhov siab raws li qhov chaw roughness. Kev tu kom zoo nrog cov kuab tshuaj tsim nyog ua ntej kev ntsuas tiv thaiv kev nyeem tsis raug. Isopropyl cawv ua haujlwm rau cov hlau feem ntau; zam cov kuab tshuaj hnyav uas yuav ua rau etch lossis stains.

Kev ntsuas tsis sib xws

Cov neeg ua haujlwm sib txawv ntsuas tib qhov chaw qee zaum qhia txog qhov sib txawv. Stylus siab, ntsuas qhov chaw, thiab kev sojntsuam taw qhia txhua yam cuam tshuam rau cov txiaj ntsig. Standardizing cov txheej txheem ntsuas - qhia meej qhov chaw, soj ntsuam cov lus qhia, thiab ntsuas qhov ntev - txhim kho kev rov ua dua. Kev ntsuas ntau yam thiab qhov nruab nrab ntawm lawv them nyiaj rau cov kev hloov hauv zos.

Cov Khoom Siv Khoom Zoo

Cov ntaub ntawv mos zoo li aluminium zoo li smear thaum lub sijhawm ua tiav, tsim kom pom tseeb ntawm qhov chaw uas muaj cov khoom siv abrasive lossis hlau. Cov ntaub ntawv nyuaj zoo li cov cuab yeej steel tiv thaiv kev ua tiav tab sis qhia txhua lub cuab yeej cim. Kev nkag siab txog tus cwj pwm ntawm cov khoom siv pab tsim cov kev cia siab tiag tiag thiab xaiv cov txheej txheem tiav.

Kev Tshaj Tawm thiab Kev Qhia

Nto xov tshuab txuas ntxiv hloov zuj zus, tsav los ntawm kev txhawj xeeb txog kev ruaj ntseg, muaj peev xwm ua haujlwm, thiab cov khoom siv tshiab.

Kev tshem tawm ntawm PFAS (ib - thiab polyfluoroalkyl tshuaj) los ntawm cov tshuaj pleev xim rau saum npoo yog qhov kev hloov pauv loj hauv kev lag luam. Cov "tshuaj lom mus ib txhis" ntsib kev tswj hwm kev txwv thoob ntiaj teb, yuam kev txhim kho lwm yam chemicals rau plating, txheej, thiab kev ua haujlwm tu. Kev lag luam tshuaj kho qhov chaw cia siab tias yuav ncav cuag $ 19.5 nphom los ntawm 2034, nrog ntau qhov kev loj hlob no tau txais txiaj ntsig zoo dua lwm txoj hauv kev.

Automated xov tshuab siv robotic caj npab thiab tswj kev hloov pauv hloov phau ntawv polishing. Cov tshuab no ntsuas qhov ua tiav hauv qhov tiag -lub sijhawm, kho lub siab abrasive thiab lub sijhawm kom ua tiav lub hom phiaj roughness tau. Aerospace manufacturers tshaj tawm 40 mus rau 60% txo nyob rau hauv lub sij hawm tiav thaum txhim kho kev sib xws siv neeg hlau polishing hlwb.

Additive manufacturing txoj kev loj hlob tsim tshiab nto tiav kev cov nyom. Hlau 3D- cov khoom luam tawm feem ntau nthuav tawm 10 txog 25 micrometers Ra raws li - luam tawm - deb rougher dua li cov khoom siv. Cov txheej txheem tshwj xeeb ua tiav rau cov txheej txheem lattice thiab cov channel sab hauv tau tshwm sim, suav nrog tshuaj lom neeg smoothing thiab abrasive flow machining uas ncav cuag lwm qhov chaw nkag tsis tau.

Laser nto texturing ua rau kev tsim cov kev tswj hwm micro-cov qauv uas ua kom zoo rau kev ua haujlwm tribological. Tsis yog tsuas yog smoothing nto, engineers tam sim no tuaj yeem tsim cov qauv roughness tshwj xeeb uas txhim kho lubrication tuav, txo kev sib txhuam hauv cov lus qhia ua ntej, lossis txhim kho txheej adhesion. Qhov kev txiav txim siab mus kom ze rau qhov chaw engineering qhib qhov muaj peev xwm ua tsis tau nrog cov qauv ua tiav.

Yuav Ua Li Cas Xaiv Qhov Zoo Nto Ua tiav rau koj qhov project

Nrog rau ntau qhov chaw ua tiav thiab cov txheej txheem tiav muaj, xaiv qhov tsim nyog tuaj yeem hnov ​​​​zoo heev -tshwj xeeb tshaj yog thaum muaj kev lag luam sib txawv, cov qauv, thiab cov khoom siv tag nrho ua rau lawv tus kheej ua tiav qhov yuav tsum tau ua. Ntawm no yog ib lub tswv yim uas siv txawm tias koj tab tom tsim ib qho kev txhaj tshuaj molded cov neeg siv khoom, ib tug tuag- nrum automotive vaj tsev, los yog ib tug precision kho mob cuab yeej.

Pib los ntawm kev txheeb xyuas qhov ua haujlwm ntawm txhua qhov chaw. Mating ntsej muag uas nias tawm tsam gaskets los yog O-rings yuav tsum tau tswj roughness nyob rau hauv ib tug tshwj xeeb Ra band. Cov ntsej muag zoo nkauj pom rau cov neeg siv kawg yuav xav tau ib lub ntsej muag glossy lossis txhob txwm matte zoo nkauj. Cov kab noj hniav sab hauv uas tsis pom kev sib cuag nrog lwm qhov feem ntau tuaj yeem lees txais raws li - ua tiav, txuag nqi tseem ceeb. Kev faib cov chaw los ntawm kev ua haujlwm tiv thaiv qhov yuam kev ntau dhau ntawm - qhia txog - siv daim pam Ra 0.4 hla tag nrho ib feem thaum tsuas yog ob lub ntsej muag tiag tiag xav tau.

Tom ntej no, phim koj qhov chaw tiav specification rau koj cov txheej txheem tsim. Txhua tus txheej txheem muaj ntau yam kev ntxhib los mos: kev txhaj tshuaj molding rov tsim txhua yam ua tiav cov pwm nqa (SPI A-1 txog D-3), CNC machining feem ntau xa 0.8 txog 3.2 micrometers Ra yam tsis muaj kev ua haujlwm thib ob, thiabtuag castingua 1.6 mus rau 6.3 micrometers Ra nyob ntawm cov hlau thiab pwm mob. Qhia meej txog qhov ua tiav nyob rau hauv qab ntawm tus txheej txheem lub peev xwm ntuj ua rau cov haujlwm tseem ceeb thib ob- sib tsoo, lapping, lossis electropolishing- mus rau cov kab ntau lawm.

Thaum kawg, xav txog lub neej tag nrho. Ib tug zoo nkauj polished nto uas corrodes nyob rau hauv lub hlis nyob rau hauv ib tug marine ib puag ncig pab tsis muaj lub hom phiaj. Lub ntsej muag zoo nkauj tuav uas ntxiab cov kab mob hauv cov zaub mov- daim ntawv thov kev sib cuag ua rau muaj kev pheej hmoo ntawm kev nyiam huv. Qhov zoo tshaj plaws saum npoo tiav yog qhov sib npaug ntawm cov tsos, kev ua tau zoo, ua haujlwm ntev, thiab tus nqi rau ib puag ncig tshwj xeeb uas qhov yuav ua haujlwm.

Yog tias koj tab tom tsim cov khoom tshiab thiab xav tau kev taw qhia ntawm kev xaiv qhov chaw tiav -los ntawm thawj lub tswv yim los ntawm pwm tsim thiab tsim khoom-hu rau peb pab neeg engineering. Peb muab cov lus qhia pub dawb rau Kev Tsim Khoom Tsim Khoom (DFM) rau txhua qhov kev nug txog qhov project, suav nrog cov lus pom zoo ua kom tiav raws li koj cov khoom siv, geometry, thiab daim ntawv thov.

Cov lus nug nquag

Dab tsi yog qhov txawv ntawm qhov chaw tiav thiab qhov roughness?

Deg tag encompasses peb yam ntxwv: roughness, waviness, thiab nteg. Nto roughness tshwj xeeb ntsuas qhov me tshaj qhov tsis sib xws- lub microscopic ncov thiab hav. Feem ntau cov engineers siv "surface finish" thiab "durface roughness" interchangeably nyob rau hauv xws li kev sib tham, txawm technically roughness tsuas yog ib feem ntawm tag.

Puas yog Ra thiab Rz qhov tseem ceeb tuaj yeem hloov pauv ncaj qha?

Tsis muaj kev hloov pauv ncaj qha vim lawv ntsuas qhov sib txawv. Ra nruab nrab txhua qhov sib txawv ntawm qhov chaw, thaum Rz tsom mus rau qhov siab tshaj plaws thiab hav. Raws li qhov kev kwv yees ntxhib, Rz feem ntau sib npaug Ra muab los ntawm 5 txog 7, tab sis qhov no txawv txav raws li cov yam ntxwv saum npoo. Ib txwm ntsuas qhov tshwj xeeb parameter koj daim duab qhia.

Vim li cas qhov chaw ntsuas sib txawv muab qhov sib txawv Ra tus nqi?

Nto roughness sib txawv nyob rau hauv ib feem ntawm lub cuab yeej siv, sib txawv tej yam kev mob, thiab manufacturing inconsistencies. Ib qho kev ntsuas tsuas yog ib qho me me xwb. Kev coj ua txheej txheem suav nrog kev ntsuas ntau yam ntawm qhov chaw tshwj xeeb thiab tshaj tawm qhov nruab nrab lossis qhov phem tshaj - tus nqi ntawm cov ntaub ntawv nyob ntawm qhov kev thuam ntawm daim ntawv thov.

Puas yog smoother ib txwm txhais tau tias zoo dua?

Tsis tas li. Qhov chaw du heev tuaj yeem ua rau muaj kev sib txhuam hauv ciam teb lubrication tej yam kev mob los ntawm cov hlau ntau dhau - mus rau - hlau kov. Qee daim ntawv thov txhob txwm siv rougher tiav-zoo li toj siab honing hauv lub tog raj kheej cav- kom khaws cov roj nplua nyeem. Qhov zoo tshaj plaws ua tiav sib npaug ntau yam xws li kev sib txhuam, hnav, sealing, txheej adhesion, thiab nqi.

Dab tsi saum npoo tiav kuv yuav tsum qhia meej rau kev txhaj tshuaj molded qhov chaw?

Rau kev txhaj tshuaj molded qhov chaw, nto tiav yog teev siv SPI qib (A-1 txog D-}3) lossis VDI 3400 qib es tsis yog Rab qhov nqi. Yog tias koj qhov yuav tsum tau muaj glossy, iav-zoo li zoo li-xws li lub lens optical lossis pob tshab npog-xws li SPI A-1 lossis A-2. Rau feem ntau cov neeg siv khoom vaj tsev nyob, SPI B-2 (400 grit polish) muaj qhov sib npaug zoo ntawm cov tsos thiab tus nqi. Matte tiav (SPI C-1 txog C-3) ua haujlwm zoo thaum koj xav tau nkaum qhov tsis zoo ntawm qhov chaw xws li cov kab sib txuas lossis cov cim dab dej. Textured finishes (SPI D-qib los yog VDI 30+) txhim kho tuav thiab npog me me molding tsis xws luag tab sis yuav tsum tau ntxiv lub kaum sab xis. Nco ntsoov tias qhov ua tiav koj xaiv yuav tsum tau sib xws nrog koj cov khoom siv iav-iav-filled tsis tuaj yeem ua tiav qhov ua tiav zoo vim muaj fiber ntau pom-dhau, thiab cov khoom siv siab-shrinkage semi-crystalline plastics zoo li polypropylene nyuaj rau polish rau A-qib zoo.

Surface finish sawv cev rau ib qho tseem ceeb specification uas txuas hniav tsim lub hom phiaj thiab tsim muaj peev xwm. Kev nkag siab txog nws cov khoom, kev ntsuas, thiab kev cuam tshuam kev ua haujlwm ua rau cov kws tshaj lij qhia cov kev ua tiav uas tsim nyog uas txhim kho kev ua tau zoo yam tsis muaj nqi tsim nyog. Raws li kev tsim cov thev naus laus zis tau nce zuj zus thiab cov kev xav tau kev ruaj ntseg tau nruj, cov txheej txheem ua tiav ntawm qhov chaw yuav txuas ntxiv hloov zuj zus ntxiv -tab sis cov hauv paus ntsiab lus ntawm qhov kev ntxhib los mos cuam tshuam li cas rau cov khoom ua haujlwm tsis tu ncua. Txawm hais tias ua haujlwm nrog kev ua haujlwm ib txwm muaj, niaj hnub Hlau Txhaj Moulding, lossis kev tsim khoom ntxiv ntxiv, kev ua tiav cov txheej txheem ua tiav cov nyiaj them nyiaj los ntawm kev txhim kho cov khoom lag luam thiab kev tsim khoom.