CNC Machining Parts: Ib Tus Kws Tsim Qauv Kev Qhia rau Cov Khoom Siv, Kev Ua Siab ntev, thiab Txheej Txheem Ua Haujlwm
Koj cov lus teb DFM nyuam qhuav rov los. Phab ntsa 0.4 hli ntawm qhov 6061-T6 lub tes tsho - lub khw hais tias nws yuav chatter thiab caij nplooj ntoos hlav rov qab tom qab unclamping. Lub ± 0.01mm cylindricity callout ntawm lub bore? Ua tiav, tab sis tsis nyob rau tib lub teeb raws li OD profile tshwj tsis yog koj xav noj cov nqi kho dua tshiab. Suab paub?
Feem ntauCNC machining qhov chawkev ua tsis tiav rov qab mus rau tib qhov peb qhov kev txiav txim siab tau ua ntxov dhau ntawm lub voj voog tsim: cov khoom siv kaw ua ntej cov txheej txheem raug txiav txim siab, kev kam rau siab tau theej los ntawm daim duab dhau los yam tsis muaj kev tshuaj xyuas, thiab cov txheej txheem kev xav tau ua yam tsis paub lub tshuab lub hnab ntawv muaj peev xwm tiag tiag. Cov lus qhia no ua haujlwm los ntawm tag nrho peb - tsis yog los ntawm daim ntawv muag khoom, tab sis los ntawm DFM cov lus qhia peb sau txhua lub lim tiam.
Vim li cas Kev Xaiv Khoom Siv Tsav Tsheb Ntau dua li tus nqi xwb
Lub instinct rau spec 6061-T6 rau txhua yam txhuas yog tsim nyog - nws pheej yig, nws tshuab ceev, thiab txhua lub khw muaj nws. Tab sis ntawm nyias-phab ntsacnc machining qhov chaw, aluminium cnc machining qhov chaw nyias phab ntsa geometry tsim ib qho teeb meem tshwj xeeb uas xaiv cov khoom ib leeg kho tsis tau: residual stress.
Kub- dov thiab txawm tias qee lub phaj Tshuag nqa cov kev ntxhov siab sab hauv. Thaum koj tshem tawm cov khoom asymmetrically - machining ib sab ntawm 0.5mm phab ntsa ua ntej lwm - koj tau tso qhov kev ntxhov siab tsis sib xws. Ib feem txav. Tsis pom kev thaum txiav, tab sis ntsuas tau ntawm kev soj ntsuam: lub ntsej muag uas nyeem tiaj tus ntawm lub tshuab nyeem 0.03-0.08mm nyo peb caug feeb tom qab ntawm chav tsev kub.
Ob txoj kev ua haujlwm. Ua ntej, qhia qhov kev ntxhov siab-relived los yog ua ntej{2}}stretched phaj (7075-T651 es tsis yog 7075-T6 yog lub zog yog tus tsav tsheb; MIC-6 cam khwb cia tooling phaj rau fixturing thiab structural brackets qhov twg flatness yog ib qho tseem ceeb). Thib ob, ua raws cov haujlwm: ntxhib mus rau hauv 0.5mm ntawm qhov kawg ntawm qhov ntev, cia qhov chaw zaum - qhov zoo tshaj plaws thaum hmo ntuj - tom qab ntawd ua tiav. Qhov thib ob pass, coj ntawm lub teeb qhov tob, txiav rau hauv cov khoom uas twb tau so lawm. Lub caij nplooj ntoos hlav-rov qab tau ploj mus vim tias qhov kev ntxhov siab reservoir tau drained nyob rau hauv lub roughing theem.
Rauprecision cnc machining qhov chaw rau aerospacedaim ntawv thov qhov twg ob qho tib si lub zog thiab qhov ntev ntawm qhov ruaj ntseg teeb meem, Ti-6Al-4V qhia nws tus kheej cov kev txwv. Titanium tsis tshua muaj thermal conductivity txhais tau tias thaum tshav kub kub concentrates ntawm lub cuab tam es tsis txhob khiav nrog lub nti. Qhov ntawd hloov txhua yam hais txog qhov koj sau cov txheej txheem:
Txiav ceev: 40-60 m / min rau uncoated carbide, mus txog 80 m / min nrog TiAlN-coated tooling
Pub rau ib tus hniav: 0.05–0.12mm - nyob hauv lub qhov rais no; rubs lub teeb dhau es tsis yog txiav thiab ua haujlwm - ua kom tawv nqaij
Coolant: siab-siab los ntawm- spindle (tsawg kawg 70 bar) qhia ntawm qhov chaw txiav, tsis yog dej nyab lub coolant tsom rau ntawm lub cev
Cov cuab yeej lub neej: aggressive hloov lub sij hawm; ib lub cuab yeej hnav ntawm titanium ua kom sov ntau dua, tsis tsawg
Hloov "dhau dej nyab thiab ua kom qeeb" rau cov kev txwv no yog li cas titanium txoj hauj lwm xaus nrog kev ua hauj lwm - hardened nto thiab tawm - ntawm - bores kam rau ua.
| Khoom siv | Machinability Index | Hom Achievable Tolerance | Yuav tsum muaj kev ntxhov siab? | Sau ntawv |
|---|---|---|---|---|
| 6061-T6 | Zoo heev (100% ref.) | ± 0.01mm niaj hnub | Rau phab ntsa <1.5mm | Default xaiv; saib nyias phab ntsa |
| 7075-T651 | Zoo (70%) | ± 0.008mm nrog kev saib xyuas | Ua ntej-txog - qis dua | Siab zog; nyuaj rau weld |
| Ti-6Al-4V | Nyuaj (20%) | ± 0.01mm nrog cov txheej txheem nruj | Tsis siv tau | Kev tswj cua sov yog txhua yam |
| 303 Stainless hlau | Nruab nrab (50%) | ± 0.015mm niaj hnub | Tsis muaj | Dawb-machining; zam rau sealing ntsej muag |
| 316L Stainless hlau | Nyuaj (40%) | ± 0.02mm kev ua haujlwm | Tsis muaj | Ua haujlwm- tawv; slower feeds yuav tsum tau |
| ib 718 | Nyuaj heev (10%) | ± 0.015mm nrog kev sib tsoo | Tsis muaj | Ceramic lossis CBN cuab yeej rau kev ua tiav |
Machinability Performance index txheeb ze rau 6061-T6=100%; Cov nuj nqis kam rau ua sawv cev rau qhov muaj txiaj ntsig zoo ntawm cov chaw ua haujlwm zoo uas tsis muaj kev sib tsoo.
Tsim kom muaj peev xwm txaus siab rau CNC Machining Parts
Cov kab uas kim tshaj plaws ntawm ib qho kev tsocai feem ntau yog kev zam txim uas tsis muaj leej twg yuav ntsuas hauv thaj teb. Ua ntej tso ib daim duab, khiav ntawm qhovcnc machining qhov chaw kam rau ua pawg -uprau txhua qhov kev hu xovtooj nruj: qhov kev sib dhos ua haujlwm tiv thaiv dab tsi, thiab dab tsi tshwm sim ntawm MMC / LMC ciam teb?
Qee cov ntsiab lus siv los ntawm peb cov ntaub ntawv tshuaj xyuas:
Ib qho 100 hli txhuas tuav rau ± 0.005mm ntawm lub qhov taub tseem ceeb yog ua tiav yam tsis muaj kev sib tsoo - tab sis nws yuav tsum muaj kev ua tiav tiav, qhov kub thiab txias - qhov chaw ntsuas qhov ruaj khov (peb siv 20℃± 0.5 degree), thiab 100% CMM tshuaj xyuas. Lub sij hawm voj voog nce kwv yees li 40% piv rau ± 0.02mm callout ntawm tib yam. Yog hais tias tus bore mates nrog ib tug bearing uas muaj 0.015mm diametral clearance lawm, lub tighter callout pab tsis muaj nuj nqi thiab ntxiv nqi tiag.
Kev sib tsoo nkag mus rau hauv daim duab thaum koj xav tau zoo dua ± 0.005mm ntawm ib qho hardened, los yog thaum Ra hauv qab 0.1μm yuav tsum tau rau sealing kev sib cuag los yog optical mounting nto. Peb qhov chaw sib tsoo tuaj yeem tuav ± 0.002mm nrog Ra 0.02μm - tab sis cov no tsis yog CNC naj npawb, lawv tau ua tiav cov haujlwm saum CNC, thiab lawv nyob ntawm daim duab tsuas yog thaum daim ntawv thov tiag tiag xav tau lawv.
Lub tswv yim txiav txim tsob ntoo:
± 0.1mm los yog coarserCov txheej txheem machining, tsis muaj kev tshuaj xyuas tshwj xeeb, ISO 2768-m default
± 0.05mm txog 0.02mm: Tswj tiav dhau, pom CMM kos
± 0.01mm txog 0.005mm: kev ua haujlwm tiav tiav, CMM tag nrho ntawm cov yam ntxwv tseem ceeb, kev tswj kub
± 0.002 hli: sib tsoo los yog lapping, 100% kev soj ntsuam, npaj rau lub sij hawm ua hmoov txhuas ntev
Ib qho geometric callout tsim nyog tshawb xyuas tshwj xeeb: runout ntawm tig nta. Tag nrho cov lus hais tawm ntawm 0.01mm ntawm lub taub hau OD txheeb ze rau lub bore datum yog nruj dua li feem ntau bearing clearances warrant, thiab nws yuam lub khw yuav zom tom qab tig. Yog tias koj daim ntawv thov zam 0.025mm, hais li ntawd - thiab tau txais qhov nrawm dua, pheej yig dua.
Txheej Txheem Pairing: Sib piv qhov txiav rau qhov tshwj xeeb
Tsis yog txhuacnc machining qhov chawtxoj hauj lwm belongs rau 5-axis machining chaw. Txoj kev sib koom ua ke ntawm cov yam ntxwv thiab cov txheej txheem yog dab tsi cais lub voj voog 40-feeb los ntawm 4-teev ib teev.
Pockets thiab qhib contours: 3-axis milling npog feem ntau ntawm prismatic nta. Cov lus nug uas txiav txim seb koj puas xav tau 5-axis tsis yog "yog qhov geometry complex?" - nws yog "Yuav tsum muaj pes tsawg lub teeb tsa 3-axis xav tau?" Ib feem nrog cov yam ntxwv ntawm tsib lub ntsej muag uas xav tau plaub qhov rov kho dua yuav feem ntau tuaj tawm pheej yig dua thiab muaj tseeb dua ntawm lub tshuab 5-axis hauv ib qho kev teeb tsa, vim tias txhua qhov rov kho dua qhia txog qhov me me datum-hloov yuam kev uas sib txuas.
Ntev shafts: Swiss tig nrog cov lus qhia bushing yog cov lus teb raug rau txhua yam nrog qhov ntev - rau - txoj kab uas hla > 12: 1. Standard tig cia lub bar overhang unsupported yav dhau los chuck, thiab deflection nyob rau hauv txiav quab yuam ua concentricity thiab txoj kab uas hla tswj unreliable. Lub bushing nyob rau hauv Swiss tig txhawb lub workpiece nyob rau hauv millimeters ntawm lub txiav cheeb tsam - deflection yeej tseem zoo ploj. Rauprecision cnc machining qhov chaw rau aerospacezoo li hydraulic valve stems thiab roj system pins, Swiss tig yog feem ntau tsuas yog txoj kev siv tau rau kev ua tiav ± 0.003mm concentricity ntawm 150mm ib feem ntawm 6mm txoj kab uas hla.
Qhov tob tob: Yog hais tias qhov tob - mus rau - dav tshaj 4: 1, txheem kawg mills pib deflect thiab chatter. Ob txoj kev xaiv: trochoidal milling yog tias lub qhov qhib rau ntawm ob qhov kawg, lossis plunge milling yog tias koj tshem tawm lub ntim loj thiab nkag tau. Qhov kev ua tau zoo: trochoidal outperforms plunge milling thaum lub qhov dav yog tsawg dua 1.5 × lub cutter txoj kab uas hla; plunge milling yog nrawm dua rau qhov dav, qhov tob tob qhov twg qhov kev txwv tseem ceeb yog cov khoom siv tshem tawm ntau dua li phab ntsa zoo. Tau txais qhov kev txiav txim siab tsis ncaj ncees lawm tsis yog ib txwm tsim ib qho seem - nws ua ib feem uas dhau kev soj ntsuam tab sis raug nqi ob zaug qhov nws yuav tsum muaj.
| Hom Feature | Thawj - Txheej Txheem Xaiv | Fallback / Thaum Yuav Ua Li Cas |
|---|---|---|
| Prismatic hnab ris, bores, slots | 3-axis milling | 5-axis yog> 3 teeb tsa xav tau |
| Complex contoured nto | 5-axis ib txhij | - |
| Cylindrical, shafts, bushings | CNC tig | Swiss tig yog L / D > 12: 1 |
| Slender precision shafts | Swiss tig | - |
| Hardened nta, ntse sab hauv ces kaum | Hlau EDM / Sinker EDM | - |
| Siab- ntim puag ncig bar qhov <32mm | Swiss tig | - |
| Pav ca, av datums | Nto sib tsoo | CNC milling yog kam rau ua> ± 0.01mm |
Qhov twg MID Precision haum rau koj lub voj voog tsim
Peb tshuaj xyuas STEP cov ntaub ntawv ua ntej hais. Qhov ntawd tsis yog kab kev muag khoom - nws yog qhov peb ntes cov yam ntxwv uas yuav ua rau peb npaug ntawm koj tus nqi ib feem ntawm - tus nqi lossis thawb xa khoom dhau los ntawm koj txoj haujlwm tseem ceeb.
Cov chij feem ntau los ntawm peb cov kab DFM xyoo no: 0.2mm sab hauv kaum radii ntawm 15mm- cov hnab tshos sib sib zog nqus (yuav tsum 0.4mm kawg zeb khiav ntawm qhov tsis yog-cov khoom nrawm), xov qhov tob ntawm 3 × nominal txoj kab uas hla hauv 316L (kais qhov kev pheej hmoo tawg ua rau hauv daim duab), thiab ob sab ± 05 hli mating. ntsej muag vim qhov kev kam rau siab tau theej los ntawm kev hloov kho yav dhau los.
Peb khiavCNC machininghla 5-axis, Swiss tig, tig-mill compound, thiab xaim EDM - tag nrho nyob rau hauv ib lub ru tsev, nrog ISO 13485-raws li kev tswj hwm zoo thiab cov ntaub ntawv digital ntawm txhua qhov haujlwm. Rauprecision CNC machined qhov chawuas kov aerospace, kev kho mob, lossis semiconductor muab cov saw hlau, peb muab FAI cov ntaub ntawv thiab tag nrho CMM cov ntaub ntawv raws li tus qauv ntawm thawj kab lus.
Yog tias koj nyob rau theem DFM, xa peb cov ntaub ntawv STEP. Peb yuav xa rov qab daim ntawv tshaj tawm DFM hauv 24 teev - tsis tas yuav muaj kev cog lus. Yog tias koj txuas ntxiv nrog thiab xav tau tham los ntawm cov peev nyiaj kam rau siab lossis kev xaiv cov txheej txheem, pebtxheej txheem engineering teamyog qhov pib qhov tseeb. Tiv tauj peb ntawm bishenprecision.com los pib sib tham.
FAQ
Kuv yuav tsum qhia lub kaum sab xis dab tsi kom tsis txhob kim me me - cov cuab yeej ua haujlwm?
Rau lub hnab tshos qhov tob D, qhia qhov tsawg kawg nkaus sab hauv kaum sab xis ntawm D/4 - thiab tsis txhob qis dua 0.5mm tshwj tsis yog tias cov yam ntxwv ua haujlwm tau tsav. Ib lub 12 hli- hnab tshos tob xav tau yam tsawg kawg nkaus R3 txiav nrog lub cuab yeej uas khiav ntawm qhov ua tau zoo thiab ua kom muaj sia nyob ntawm txoj haujlwm. Txhua yam nruj dua ua rau me me - txoj kab uas hla kawg zeb: qeeb dua, ntau deflection, ntau dua qhov yuav tawg. Yog hais tias lub ces kaum geometry tsis muaj mating muaj nuj nqi, nce lub vojvoog thiab tso nyiaj rau lub voj voog lub sij hawm txuag.
Koj puas tuaj yeem tuav ± 0.005mm ntawm 100mm txhuas qhov tsis sib tsoo?
Yog - ntawm lub bore lossis OD feature, nrog rau txoj cai sib lawv liag. Peb niaj hnub tuav ± 0.005mm ntawm aluminium bores mus txog 100mm siv lub siab ua tiav boring pass nyob rau hauv qhov kub thiab txias - tswj ib puag ncig, ua raws li CMM pov thawj. Qhov kev txwv yog thermal: aluminium expands roughly 23μm ib℃ib 100mm ntawm qhov ntev, yog li yog hais tias lub khw hauv pem teb yog 5℃saum toj no 20℃siv kub thiab ib feem tsis stabilized ua ntej ntsuas, tus xov tooj tshuaj xyuas yog tsis ncaj ncees lawm txawm lub tshuab txiav zoo npaum li cas. Cia 30-60 feeb ntawm thermal stabilization ua ntej ntsuas zaum kawg.
Thaum twg cnc machining qhov chaw kam rau ua pawg- nce kev ncaj ncees rov- kam rau ua daim duab?
Thaum cov sum ntawm ib tug neeg feature tolerances nyob rau hauv ib tug sib dhos pawg tshaj lub functional clearance ntawm lub mating interface. Khiav qhov phem tshaj - cov ntaub ntawv lej lej ua ntej: yog tias tag nrho cov yam ntxwv nyob ntawm lawv cov kev txwv ib txhij, lub rooj sib txoos puas tseem ua haujlwm? Yog hais tias cov lus teb tsis yog, nruj cov tolerances uas ua rau feem ntau ntawm cov pawg (feem ntau yog lub datum nta thiab thawj mating txoj kab uas hla). Yog tias cov lus teb yog muaj nrog cov paj, koj tuaj yeem dhau - siab ntev - uas raug nqi nyiaj yam tsis muaj kev yuav khoom.
Dab tsi saum npoo tiav kuv yuav tsum qhia rau ntawm lub ntsej muag sealing rau O- nplhaib zawj?
Ra 0.8μm yog tus qauv zoo li qub O-ring sealing ntsej muag; Ra 0.4μm rau dynamic seals. Ob leeg ua tiav nrog kev tswj xyuas tiav milling dhau - tsis muaj kev sib tsoo. Kev qhia Ra 0.2μm lossis zoo dua ntawm qhov sib khi zawj thawb koj mus rau hauv kev sib tsoo lossis lapping thaj chaw thiab nce nqi ntau. Yog tias koj O-ntiv nplhaib cov chaw tsim khoom cov lus qhia kev teeb tsa hu tawm qhov yuav tsum tau ua tiav, siv tus lej ntawd ncaj qha; Yog tias nws tsis yog, Ra 0.8μm yog tiv thaiv rau kev siv zoo li qub.
