Positioning method ib
Ib txoj kev muab tso rau raws li lub dav hlau. Cov khoom tso rau hauv qhov chaw muaj xws li cov paib txhawb nqa, kev txhawb nqa tuaj yeem kho tau thiab kev txhawb nqa nws tus kheej, thiab lwm yam. Cov txheej txheem rau kev tso rau ntawm cov khoom nto yog raws li hauv qab no.
Positioning txoj kev ob
Ib txoj kev muab tso rau thiab muab tso rau hauv cov khoom siv raws li qhov chaw cylindrical sab nraud ntawm lub workpiece. Thaum lub cylindrical nto ntawm lub workpiece yog siv raws li ib tug positioning siv, feem ntau siv positioning txoj kev yog rau nruab lub sab nrauv lub tog raj kheej nyob rau hauv ib tug puag ncig lub qhov, ib tug semi-vrcular qhov, ib tug V-shaped block los yog ib tug centering clamping mechanism.
2.1 Txhim kho lub tog raj kheej sab nraud hauv lub qhov puag ncig
2.2 Txhim kho lub tog raj kheej sab nraud rau hauv V-shaped thaiv
2.3 Txhim kho lub tog raj kheej sab hauv hauv nruab nrab clamping mechanism
Muab txoj hauv kev peb
Txoj kev muab tso rau thiab muab tso rau ntawm lub workpiece siv lub voj voog raws li qhov chaw siv. Thaum qhov kev siv qhov chaw nyob yog ib lub voj voog, lub positioning pin thiab positioning mandrel feem ntau yog siv rau qhov chaw. Tsis tas li ntawd, nws tuaj yeem muab tso rau los ntawm kev siv lub hauv paus clamping mechanism.
3.1 Nrhiav tus pin positioning
3.2 Positioning mandrel positioning
3.3 Qhov chaw ntawm qhov nruab nrab clamping mechanism
Lub ntsiab yog vim li cas rau qhov kev ua yuam kev ntawm lub machining loj nyob rau hauv CNC machining yog: vim qhov loj thiab geometric duab yuam kev ntawm lub positioning datum nws tus kheej thiab qhov sib txawv ntawm lub positioning datum thiab lub positioning caij, ob qho tib si saum toj no ua rau lub positioning datum. tib batch ntawm workpieces raws li cov kev taw qhia ntawm kev ua luaj li cas Qhov siab tshaj plaws hloov chaw yog hu ua qhov positioning reference displacement yuam kev. Yog li, cov ntsiab lus hauv qab no yuav tsum tau them sai sai rau thaum tsim cov khoom siv rau CNC machining:
1) Lub rau qib ntawm kev ywj pheej ntawm lub workpiece yog tag nrho cov txwv los ntawm qhov chaw nyob rau hauv lub fixture, thiab tuav ib tug kiag li txiav txim siab txoj hauj lwm nyob rau hauv lub fixture, uas yog hu ua tiav positioning.
2) Raws li kev ua haujlwm sib txawv ntawm qhov chaw ua haujlwm ntawm qhov chaw ua haujlwm, tus naj npawb ntawm qhov chaw txhawb nqa cov ntsiab lus tuaj yeem tsawg dua rau. Qee qib kev ywj pheej muaj feem cuam tshuam rau kev ua haujlwm, thiab qee qhov kev ywj pheej tsis muaj kev cuam tshuam rau kev ua haujlwm. Qhov xwm txheej no yog hu ua qhov chaw tsis tiav. Kev tso cai tsis tiav yog tso cai.
3) Raws li cov txheej txheem ua tiav, qib ntawm kev ywj pheej uas yuav tsum tau txwv tsis pub txwv, uas yog hu ua under positioning. Tsis tso cai undertargeting. Vim hais tias under-positioning tsis tuaj yeem lav cov kev xav tau ua.
4) Qhov chaw nyob qhov twg ib lossis ob peb qib ntawm txoj kev ywj pheej ntawm cov khoom ua haujlwm raug txwv ntau zaus los ntawm qhov chaw sib txawv yog hu ua over positioning. Thaum over positioning ua rau deformation ntawm lub workpiece los yog positioning ntsiab thiab cuam tshuam rau machining raug, nws yuav tsum nruj me ntsis txwv tsis pub. Txawm li cas los xij, over-positioning tsis cuam tshuam rau kev ua haujlwm raug, tab sis txhim kho kev ua haujlwm ruaj khov.
Positioning Design Example Analysis
Lub tshuab dhos tee clamp nyob rau hauv daim duab saum toj no yog tsim ntawm chassis, caij nplooj ntoos hlav, txav thaiv, puab tsaig, positioning pin thiab lwm yam. Los ntawm qhov kev nyab xeeb ntawm qhov pom, nws tsis yog qhov nyuaj kom pom tias lub fixture muaj qhov tsis xws luag: thaum lub fixture yog ntsia rau ntawm lub tshuab dhos pib ua, lub centerline ntawm spindle rotation yog perpendicular mus rau lub positioning pin ntsia ntawm lub fixture. Yog tias tsis muaj kev dag ntxias, lub spindle rotating positioning pin yuav raug muab pov tseg kom ua rau muaj kev phom sij. Yog li ntawd, ntxiv rau kev tsom mus rau cov ntsiab lus tsim, qhov chaw ntawm lub workpiece kuj yuav tsum muaj kev nkag siab txog cov txheej txheem.
