CNC machining thev naus laus zis muaj qib siab ntawm qhov tseeb thiab qhov tseeb thiab tuaj yeem tsim cov khoom zoo nrog rau qhov me me li 0.025 hli. Txoj kev machining no belongs rau qeb ntawm kev tsim tawm, uas txhais tau hais tias thaum lub sij hawm machining txheej txheem, cov khoom yuav tsum tau tsim los ntawm kev tshem tawm cov khoom. Yog li ntawd, cov cim txiav me me yuav nyob twj ywm rau ntawm qhov chaw tiav, ua rau muaj qee qhov kev ntxhib los mos ntawm qhov chaw.
Qhov roughness yog dab tsi?
Qhov saum npoo roughness ntawm cov khoom tau los ntawmCNC machiningyog ib qho qhia txog qhov nruab nrab fineness ntawm qhov chaw zoo nkauj. Txhawm rau txhawm rau txheeb xyuas tus yam ntxwv no, peb siv ntau yam kev ntsuas los txhais nws, ntawm cov uas Ra (arithmetic txhais tau tias roughness) yog qhov feem ntau siv. Nws yog xam raws li qhov sib txawv me me ntawm qhov siab ntawm qhov chaw thiab qhov hloov pauv tsis tshua muaj, feem ntau yog ntsuas raws li lub tshuab ntsuas hauv microns. Nws yog ib nqi sau cia hais tias nto roughness thiab nto tiav yog ob lub ntsiab lus sib txawv: txawm hais tias high-precision machining tshuab tuaj yeem txhim kho qhov smoothness ntawm qhov chaw, qhov roughness tshwj xeeb yog hais txog kev ntxhib los mos ntawm qhov chaw tom qab machining.
Peb ua li cas thiaj ua tau qhov sib txawv ntawm qhov roughness?
Qhov saum npoo roughness ntawm cov khoom tom qab machining tsis yog randomly generated tab sis yog nruj me ntsis tswj kom ncav cuag tus qauv tus nqi. Tus nqi tus qauv no yog pre-set, tab sis nws tsis yog ib yam dab tsi uas yuav muab arbitrarily. Hloov chaw, nws yog ib qho tsim nyog yuav tsum ua raws li Ra tus nqi qauv uas tau lees paub dav hauv kev tsim khoom lag luam. Piv txwv li, raws li ISO 4287, hauvCNC machining txheej txheem, Ra tus nqi ntau tuaj yeem qhia meej meej, xws li los ntawm ntxhib 25 microns mus rau qhov zoo heev 0.025 microns kom haum rau ntau yam kev thov sib txawv.
Peb muab plaub qib roughness saum npoo, uas kuj yog qhov tseem ceeb rau CNC machining daim ntaub ntawv:
3.2m r ib
Ra 1.6 μm Ra
Ra 0.8 μm Ra
Ra 0.4 μm Ra
Ntau cov txheej txheem machining muaj qhov xav tau sib txawv rau qhov roughness ntawm qhov chaw. Tsuas yog thaum cov ntawv thov tshwj xeeb tau teev tseg yuav txo qis qhov kev ntxhib los mos tau teev tseg vim tias ua tiav cov txiaj ntsig qis dua yuav tsum muaj kev ua haujlwm ntau dua thiab kev tswj xyuas nruj dua, uas feem ntau nce nqi thiab sijhawm. Yog li ntawd, thaum yuav tsum muaj ib qho kev ntxhib los mos, kev ua haujlwm tom qab ua haujlwm feem ntau tsis raug xaiv ua ntej vim tias cov txheej txheem tom qab ua haujlwm nyuaj rau kev tswj kom raug thiab yuav muaj kev cuam tshuam tsis zoo rau qhov ntev ntawm qhov ntev.
Hauv qee cov txheej txheem machining, qhov roughness ntawm ib feem muaj qhov cuam tshuam loj rau nws txoj haujlwm, kev ua tau zoo, thiab kav ntev. Nws yog ncaj qha ntsig txog kev sib txhuam coefficient, suab nrov, hnav, tsim hluav taws xob, thiab kev sib txuas ua haujlwm ntawm qhov chaw. Txawm li cas los xij, qhov tseem ceeb ntawm cov xwm txheej no yuav txawv nyob ntawm qhov tshwj xeeb daim ntawv thov scenario. Yog li ntawd, nyob rau hauv tej rooj plaub, deg roughness tej zaum yuav tsis yog ib qho tseem ceeb, tab sis nyob rau hauv lwm yam mob, xws li siab nro, siab kev nyuaj siab, siab vibration ib puag ncig, thiab qhov twg haum haum, smooth txav, ceev ceev, los yog raws li ib tug kho mob cog yuav tsum tau. Hauv cov khoom, qhov roughness ntawm qhov chaw yog qhov tseem ceeb. Nyob rau hauv luv luv, txawv daim ntawv thov tej yam kev mob muaj sib txawv yuav tsum tau rau lub nto roughness ntawm qhov chaw.
Tom ntej no, peb yuav ua kom tob tob rau hauv cov qhab nia roughness thiab muab tag nrho cov ntaub ntawv koj xav paub thaum xaiv tus nqi Ra rau koj daim ntawv thov.
3.2mRa ua
Qhov no yog qhov dav siv qhov kev npaj ua ntej uas tsim nyog rau ntau qhov chaw thiab muab cov smoothness txaus tab sis tseem muaj cov cim pom tseeb. Thaum tsis muaj cov lus qhia tshwj xeeb, qhov txheej txheem roughness saum npoo no feem ntau tau txais los ntawm lub neej ntawd.
3.2 μm Ra machining cim
Rau qhov chaw uas yuav tsum tau tiv thaiv kev ntxhov siab, thauj khoom, thiab kev co, qhov pom zoo tshaj plaws ntawm qhov roughness tus nqi yog 3.2 microns Ra. Nyob rau hauv cov xwm txheej ntawm lub teeb load thiab qeeb zog ceev, qhov roughness tus nqi no kuj siv tau los phim qhov chaw txav. Txhawm rau kom ua tiav qhov roughness, high-speed txiav, nplua pub, thiab me ntsis txiav quab yuam yuav tsum tau thaum lub sij hawm ua.
1.6m r ib
Feem ntau, thaum xaiv qhov kev xaiv no, cov cim txiav ntawm ib feem yuav yog lub teeb heev thiab tsis paub meej. Tus nqi Ra no yog qhov zoo rau cov khoom siv nruj nruj, qhov chaw raug kev ntxhov siab, thiab qhov chaw txav mus qeeb thiab maj mam thauj khoom. Txawm li cas los xij, nws tsis haum rau qhov chaw uas tig nrawm los yog muaj kev vibration hnyav. Qhov roughness saum npoo no yog ua tiav los ntawm kev siv cov txiav ceev, nplua txau, thiab txiav lub teeb nyob rau hauv kev tswj nruj nruj.
Hais txog tus nqi, rau cov qauv aluminium alloys (xws li 3.1645), xaiv qhov kev xaiv no yuav nce cov nqi tsim khoom los ntawm kwv yees li 2.5%. Thiab raws li qhov nyuaj ntawm ntu nce, tus nqi yuav nce raws li.
0.8m r ib
Ua kom tiav qib siab ntawm qhov chaw tiav no yuav tsum tau tswj nruj heev thaum lub sijhawm tsim khoom thiab yog li ntawd, kuj kim heev. Qhov kev ua tiav no feem ntau yog siv rau ntawm qhov chaw uas muaj kev ntxhov siab thiab qee zaum siv rau cov kabmob uas txav thiab thauj khoom qee zaus thiab lub teeb.
Hais txog tus nqi, xaiv qhov kev ua tiav qib siab no yuav nce cov nqi tsim khoom los ntawm kwv yees li 5% rau cov qauv aluminium alloys xws li 3.1645, thiab cov nqi no nce ntxiv raws li qhov ua haujlwm ntau dua.
0.4m r ib
Qhov zoo tshaj plaws (lossis "smother") nto tiav yog qhov qhia tau hais tias muaj qhov zoo ntawm qhov chaw tiav thiab tsim nyog rau qhov chaw uas muaj kev ntxhov siab lossis kev ntxhov siab, nrog rau cov khoom sib hloov ceev xws li bearings thiab shafts. Vim tias cov txheej txheem ntawm kev tsim cov txheej txheem no yog qhov nyuaj, nws tsuas yog xaiv thaum smoothness yog qhov tseem ceeb.
Hais txog tus nqi, rau cov qauv aluminium alloys (xws li 3.1645), xaiv qhov zoo ntawm qhov roughness yuav ua rau cov nqi ntau lawm los ntawm kwv yees li 11-15%. Thiab raws li qhov nyuaj ntawm qhov nce, cov nqi yuav tsum tau nce ntxiv.
Post lub sij hawm: Dec-10-2024