Fixture & Jig Manufacturing: Cov txheej txheem tseem ceeb rau kev nce tag nrho cov khoom raug
Dab tsi "fixture & jig manufacturing" tiag tiag txhais tau tias
Nws tsis yog tsuas yog lub machining ntawm qhov chaw, clamps, hauv paus- phaj thiab laum- bushings, tab sis kuj lawv cov tom ntej sib dhos, calibration thiab validation kom cov cumulative yuam kev uas lawv qhia yog tsawg dua los yog sib npaug rau 30 % ntawm cov hauj lwm -piece tolerance band. Hauv cov nroj tsuag niaj hnub no qhov kev ua haujlwm no raug kho raws li kev sib cais, siab - txheej txheem precision sib npaug ntawm qhov tseem ceeb rau kev ua haujlwm ntawm qhov kawg- khoom nws tus kheej.
Vim li cas nws ncaj qha txiav txim qhov raug
60-80% ntawm qhov loj me ntawm qhov sib tsoo hauv cov khoom tsim tawm los ntawm qhov tsis sib xws, tsis yog los ntawm CNC tshuab cuab yeej.
Ib tug nrhiav tus pin dhuav rau H7 hloov H6 tuaj yeem ntxiv 15 µm datum- ua haujlwm; lub hauv paus- phaj nyo hau 0.02 hli tuaj yeem ua ob npaug ntawm qhov profile yuam kev ntawm aerospace tav.
Conversely, ib tug jig milled, hauv av thiab lapped kom tsawg dua los yog sib npaug li 3 µm flatness, nrog pins lapped rau gage - zoo (± 1 µm), tuaj yeem thawb Cpk los ntawm 1.2 txog 1.67 yam tsis tau kov cov kev txiav.
Cov kauj ruam tsim khoom tseem ceeb thiab qhov tseeb levers
Cov khoom ua ntej- xaiv
- Tsawg- carbon steel (20#) rau tus nqi- rhiab vuam jigs; ua ntej-hardened 40Cr los yog 45# (28–32 HRC) rau siab- hnav drilling jigs; 7075-T6 txhuas rau qhov hnyav-tseem ceeb aerospace fixtures.
Rough machining nrog kev tswj nyiaj txiag
- Tawm 0.3-0.5 hli rau ib sab rau kev ntxhov siab- nyem; vibratory stress-relief ntawm 120℃rau 30 min txo qhov ntev -lub sij hawm distortion los ntawm 50%.
Kev kho cua sov & stabilization
- Quench-thiab- kub rau 38–42 HRC, ces cryogenic soak (−190 degree, 8 h) los hloov cov austenite khaws cia; Qhov kawg hardness variation < 1 HRC guarantees hnav khaub ncaws.
Precision tiav machining
- CNC jig- tho txawv lossis ntsug machining chaw nrog spindle khiav - tawm Tsawg dua lossis sib npaug li 2 µm; interpolate nrhiav qhov ntawm 200 mm / min, 0.05 mm qhov tob ntawm kev txiav kom ua tiav IT6 ncaj qha.
- Siv CBN lossis PCD ntxig rau txhuas kom ncav cuag Ra 0.4 µm yam tsis muaj polishing, txuag 30% lub sijhawm voj voog.
High- precision sib tsoo & lapping
- Nto grinder nrog tsawg dua lossis sib npaug li 1 µm parallelism; match- sib tsoo dowel qhov rau 3 µm clearance rau gage pins.
- Tes-phaj tseem ceeb pads nrog 1 µm pob zeb diamond muab tshuaj txhuam; Qhov kawg flatness Tsawg dua los yog sib npaug ntawm 2 µm tshaj 200 mm × 200 mm.
Txheej & nto engineering
- Hard-chrome flash (5 µm) ntawm steel clamps muab 72 HRC nto thiab 0.2 kev sib txhuam coefficient, ob npaug lub neej thaum clamping Ti qhov.
- Hard-anodize (Type III, 50 µm) ntawm txhuas tiv thaiv galling nrog stainless ua hauj lwm- pieces.
Metrology- tsav los ua ke
- Xiav rau qhov chaw sib cuag; 80% yam tsawg kawg nkaus bearing cheeb tsam yuav tsum tau.
- Laser{0}}tracker lossis CMM validates tag nrho fixture raug; ib qho yuam kev > 5 µm raug kho los ntawm kev xaiv lapping lossis shim- kho.
Qhov kawg kev tsim nyog nrog "golden part"
- Tshuab peb qhov chaw siv; Yog tias lawv qhov profile nyob rau hauv 10% ntawm kev kos duab kam rau ua thiab 6σ kis < 25% ntawm kev kam rau siab band, lub fixture raug tso tawm rau ntau lawm.
Cov qib raug raug ua tiav niaj hnub no
- Nrhiav qhov rov ua tau: ± 2 µm (3σ) ntawm kev hloov tsheb tsheb - kab teeb tsa.
- Perpendicularity: Tsawg dua los yog sib npaug li 5 µm ntawm bore -axis thiab puag tshaj 100 mm ntev.
- Kev ua tiav ntawm cov ntaub qhwv ntsej muag: Ra 0.1 µm, tshem tawm micro- plam thaum lub sij hawm milling hnyav.
Kev cuam tshuam rau kev ua haujlwm hauv qab
- Txo thawj - lub sijhawm tshuaj xyuas kab lus los ntawm 40 % vim tias datum- cuam tshuam tsis zoo - kev sib raug zoo ploj mus.
- Txiav rework / seem nqi 15-25% hla ib feem ntawm 10 000-ib pawg.
- Ua kom "tshuab- txoj cai- thawj- lub sijhawm" rau 5-axis aerospace qhov chaw, qhov twg 0.1 hli phab ntsa- thickness kam rau ua yuav ua tsis tau yam tsis muaj ultra-stable jig.
Yav tom ntej tiam
- Additive manufacturing ntawm complex clamping puab tsaig (Ti-6Al-4V luam tawm, ces 5 µm-precision machined) shortens tus me nyuam los ntawm 3 lub lis piam mus rau 3 hnub.
- Embedded piezo sensors ntsuas clamping quab yuam hauv lub sijhawm, pub cov ntaub ntawv rau CNC rau kev hloov pauv pub- tus nqi tswj.
- Digital ntxaib: cov qauv sib txuas nrog lub khw-pem teb CMM; kwv yees thermal kev loj hlob yog compensated txiav los ntawm lub tshuab offsets.
Los ntawm kev kho fixture & jig manufacturing raws li ib tug siab - txheej txheem precision- ua tiav nrog tswj kev kho cua sov, micron - theem machining thiab nruj metrology - tuam txhab uas muag hloov lawv tag nrho cov txheej txheem ntau lawm, txav los ntawm "tau txais" mus rau "lub ntiaj teb-chav kawm" qhov tseeb yam tsis tau nqis peev hauv cov cuab yeej siv tshuab tshiab.
