Kumasebe olawulo lomgangatho kwihlabathi liphela, umatshini wokulinganisa olungelelanisiweyo (i-CMM) uthatha isikhundla segunya. Xa icandelo le-aerospace elinomatshini lifuna ukuqinisekiswa ngokuchasene nomzobo walo wobunjineli, xa iseti yegiya yokuchaneka kufuneka ihlolwe ngaphambi kokuhlanganiswa, xa i-implant yezonyango ifuna isiqinisekiso sobukhulu ngaphambi kokuba isetyenziswe kwinkqubo yotyando - i-CMM idla ngokuba ngumlamli wokugqibela. Ukulinganisa kwayo kuthwele ubunzima bokuthembeka kobugcisa obuchaphazela izigqibo ezichaphazela ukhuseleko, ukusebenza, kunye noxanduva lorhwebo.
Sekunjalo kuzo zonke izixhobo ze-elektroniki ezintsonkothileyo, izikali ezichanekileyo, kunye nesoftware entsonkothileyo eyenza i-CMM yanamhlanje, isiseko sokuchaneka komatshini sisiqwenga selitye. Ukuqonda isizathu - nokuqonda okwenzekayo xa elo litye lingekho kumgangatho owaneleyo - kutyhila into ebalulekileyo malunga nendlela ukuchaneka kokulinganisa okufezekiswa ngayo kwiinkqubo zomzimba.
Indlela iCMM elinganisa ngayo nendlela esebenza ngayo
Umatshini wokulinganisa olungelelanisiweyo ulinganisa ii-coordinates ezintathu-dimensional zamanqaku kwinto ebonakalayo. Ukwenza oku ngokuzisa i-sensing probe ukuba idibane (okanye kufutshane, kwimeko yee-non-contact scanning probes) umphezulu wenxalenye elinganiswayo, urekhoda indawo ye-XYZ yendawo nganye yokunxibelelana, kwaye ubale iimpawu zejometri (iiplane, ii-cylinders, ii-cones, iindawo ezikhululekileyo) ezifanelana kakuhle nelifu le-point elilinganisiweyo.
Ukuchaneka kwale nkqubo kuxhomekeke kwizinto ezininzi ezisebenzisana njengenkqubo:
- Ukuchaneka kwee-axes ezintathu ezithe tye zomatshini (ukuba zihamba kakuhle kangakanani kwimigca ethe tye, kunye nokuba izikhundla zazo zilinganiswa ngokuchanekileyo kangakanani ngee-encoders ezithe tye)
- Ukuchaneka kunye nokuphindaphinda kwenkqubo ye-probe (indlela ehlala ibangela ngayo xa iqhagamshelwa kunye nendlela echaneke ngayo ukutshintshwa kwayo kwinqanaba lokufunda isikali)
- Uzinzo lobushushu besakhiwo somatshini (ukuthintela ukwanda okwahlukileyo phakathi kwezinto ezahlukeneyo)
- Umgangatho womphezulu we-datum reference (umphezulu othe tyaba apho zonke izilinganiso ze-Z-axis zivela khona kwaye apho i-geometry yomatshini isekelwe khona)
Le nto yokugqibela — umphezulu we-datum reference — yipleyiti yomphezulu wegranite apho iCMM yakhelwe khona. Kwiintlobo ezininzi ze-CMM designs, ipleyiti yomphezulu wegranite ayisiyo nje itafile engasebenziyo apho umatshini uhleli khona. Yinxalenye esebenzayo yenkqubo yokulinganisa. Imvelaphi yesikali se-Z-axis seCMM ichazwa ngokumalunga nalo mphezulu; iindlela zokuqondisa zee-axes ezithe tye zomatshini zifakelwe kwaye zifumana ukuthe tye kwazo kulo mphezulu; inxalenye elinganiswayo ixhomekeke kulo mphezulu (okanye kwisixhobo esifakelwe kuwo). Nasiphi na impazamo ekusitheleni okanye ekuzinzeni kwexesha elide kwepleyiti yegranite isasazeka ngqo kwii-coordinates ezixelwa yiCMM.
Ipleyiti yoMphezulu weGranite njengeDatum Zero
Kwi-metrology yakudala, i-datum luphawu oluchanekileyo ngokwethiyori (inqaku, i-axis, okanye iplane) apho kuthathwa khona imilinganiselo. Kwihlabathi le-CMM, i-datum plane ngumphezulu wepleyiti yomphezulu wegranite.
Xa umenzi weCMM elinganisa umatshini omtsha, usebenzisa umphezulu wetafile yegranite njengesalathiso sokuseka inkqubo yangaphakathi yomatshini. Ngokukodwa:
- Umphezulu wetafile uchaza iplani ye-XY yenkqubo yokulungelelanisa umatshini
- Ibhulorho yeCMM okanye i-gantry vertical axis (Z) ibhekiselwa kule plane
- Ukuthe tye kwee-axes ezithe tye (X kunye no-Y) kulinganiswa kwaye kuhlawulelwa xa kuthelekiswa nemo yokwenyani yomphezulu wetafile
Olu calibration lugcinwa njengetafile ye-geometric compensation ngaphakathi kwe-CMM controller. Xa umatshini elinganisa inxalenye, ezi compensation zigciniweyo zilungisa iimpazamo ezicwangcisiweyo kwintshukumo yomatshini — iimpazamo ezilinganisiweyo nezachazwa ngokumalunga nomphezulu wegranite ngexesha lo calibration.
Ukuba ipleyiti yomphezulu wegranite emva koko itshintsha imo — ngenxa yokuguguleka, i-gradient yobushushu, okanye ukukhululeka koxinzelelo lwangaphakathi — itheyibhile yokuhlawula ayisachazi ngokuchanekileyo i-geometry yomatshini. Kubonakala ngathi i-CMM isebenza ngokuqhelekileyo (iyashukuma, i-probe ibangela, imilinganiselo iyaxelwa) kodwa imilinganiselo iqulethe iimpazamo ezicwangcisiweyo ezikhula njengoko imeko yegranite isiya isiba mandundu. Ezi mpazamo zifihlakele ngakumbi kuba azikho ngokungacwangciswanga — zihambelana ngokwendawo, zibonakala njengeziphazamiso ezicwangcisiweyo kwiindawo zetheyibhile apho kuye kwavela khona impazamo yefom.
Ukukhethwa KwamaBanga kwiZicelo zeCMM
Ayizizo zonke izicelo zeCMM ezifuna umgangatho ofanayoipleyiti yomphezulu wegranite, kodwa ukhetho kufuneka luqhutywe ziimfuno zokungaqiniseki komlinganiselo wesicelo, kungekhona ixabiso lokuthenga letafile.
Ii-CMM ezibhekiselele kuzo kunye neeLabhoratri zoLungiso
Ii-CMM ezisetyenziswa njengoomatshini bokubhekisa — ukulinganisa ezinye ii-CMM, ukuqinisekisa izinto ezisetyenzisiweyo, okanye ukusebenza njenge-anchor yokulandelela inkqubo yokulinganisa — zihlala zifuna ibakala 00 (ibanga lelebhu ngokwe-DIN 876) okanye iLebhu yebakala ngokwe-ASME B89.3.7. Ezi ziiplate zomphezulu ezikumgangatho ophezulu eziveliswa kurhwebo, ezinokunyamezelana okuthe tyaba kuluhlu oluphantsi lwe-micrometer yedijithi enye phezu komphezulu wetafile epheleleyo.
Kule nqanaba, umphezulu wetafile yegranite kufuneka uphinde uhlolwe kwaye uphinde uqinisekiswe, kunye nemilinganiselo elandelelwa ngokwemigangatho yesizwe. Ixesha lokuhlolwa kwakhona lixhomekeke kubunzulu bokusetyenziswa kunye nokubaluleka kwemilinganiselo, kodwa ngokuqhelekileyo iba minyaka le okanye kabini ngonyaka.
Uhlolo loMgangatho weMveliso CMMs
Ii-CMM ezisetyenziswa ekuhlolweni kwemveliso — ukuqinisekisa ukuba iindawo ezifakwe ngomatshini ziyahlangabezana nemilinganiselo yobukhulu ngaphambi kokuba zihlanganiswe — zihlala zisebenza neepleyiti zomphezulu zebanga 0 okanye zebanga 1. Iimfuneko zokungaqiniseki komlinganiselo wokuhlolwa kwemveliso zikhululekile ngakumbi kunomsebenzi wokulinganisa, kwaye ngokufanayo, iimfuno zokuthamba kwitafile yegranite azinzima kangako.
Nangona kunjalo, "ukukhululeka ngakumbi" kusafuneka kuqondwe kwimeko yokunyamezelana kwenxalenye ehlolwayo. Ukuba i-CMM yemveliso isetyenziselwa ukuqinisekisa iimpawu ezinokunyamezelana kwe-10–20 μm, ipleyiti yomphezulu yebanga loku-1 (enobuthebelele kuluhlu lwe-5–10 μm phezu kwetafile ephakathi) kufanelekile. Ukusebenzisa ipleyiti yomphezulu yebanga lesi-2 okanye yebanga leworkshop kwesi sicelo kunobungozi bokuba impazamo yefom yetafile inegalelo kwinxalenye enkulu yokungaqiniseki kokulinganisa iyonke.
IiCMM ezincinci ze-Electronics kunye ne-Precision Optics
Kwicandelo le-elektroniki lokuvelisa kunye ne-precision optics, ii-CMM ezincinci zisetyenziselwa ukulinganisa iimpawu kwinqanaba le-micrometer kunye ne-sub-micrometer kwizinto ezifana neendawo zokudibanisa, ii-optical mounts, kunye neekhamera ezisebenza ngomatshini ochanekileyo. Ezi zicelo zifuna iipleyiti zomphezulu ze-grade 00 - kwaye, kwezinye iimeko, iitafile ze-granite ezilawulwa ngobushushu - ukufezekisa ukungaqiniseki komlinganiselo okufunekayo.
Iindlela Eziqhelekileyo Zokusilela: Yintoni Engalunganga Xa Umgangatho WeGranite Unganelanga
Iziphumo zokuchaza okanye ukwamkela i-granite esemgangathweni onganelanga kwi-CMM zibonakala kwiindlela ezahlukeneyo zokusilela:
Ukunciphisa iNkqubo kwindawo ethile kwiindawo ezisetyenziswa kakhulu
Umbindi wetafile yeCMM, kunye neendawo ezingaphantsi kweendawo ezisetyenziswa rhoqo, zifumana uxinano oluphezulu loqhagamshelwano lweprobe kunye nenani elikhulu lemijikelo yokulayisha inxalenye. Ekuhambeni kwexesha, ezi ndawo zinokukhula ziguge ngendlela enokulinganiswa, zivelise ukugoba okuncinci. Itafile yegranite yebanga 0 okanye yebanga 00 eyenziwe kakuhle, eyenziwe ngezinto eziqinileyo neziqinileyo, iyamelana nokuguguleka ngempumelelo. Ilitye elikumgangatho ophantsi - ngakumbi igranite yemarble okanye igranite engwevu enobunzima obuphantsi - ithambile kakhulu kwaye iphuhlisa iipatheni zokuguguleka ngokukhawuleza.
Kwiindawo zemveliso apho indawo ethile yokufakelwa isetyenziswa amawakawaka eenkulungwane ngenyanga, oku kugruzuka kunokuqokelelwa kude kube negalelo ekuchanekeni kokulinganisa kungekapheli unyaka omnye ukuya kwemibini. Iimpawu zibonakala njenge-systematic positive okanye negative bias kwi-Z-coordinate yeenxalenye ezilinganiswe kwindawo egruzukayo — i-bias engenakubonwa ngoko nangoko njengengxaki yokugruzuka kwetafile.
Ukuphambuka kobushushu obuvela kuMgangatho woMgangatho
Iitafile zegranite zeCMM kwiindawo zemveliso zihlala zibekwe ngqo kumgangatho wefektri ofumana i-gradients yobushushu - ngakumbi kufutshane neendonga zangaphandle, iingcango zedokhi yokulayisha, okanye kufutshane nezixhobo zenkqubo yokuvelisa ubushushu. Ukuba itafile yegranite isondelelene kakhulu nomgangatho ongalinganiyo, ubushushu buhamba ngokungalingani etafileni, nto leyo edala i-gradient yobushushu ephazamisa umphezulu wetafile.
I-granite exineneyo ye-premium (njenge-granite emnyama enoxinano oluphezulu) ine-thermal conductivity ephantsi kunye ne-CTE ephantsi kune-granite eqhelekileyo engwevu, oko kuthetha ukuba zombini zisabela kancinci kwiingxaki zobushushu kwaye aziguquguquki kangako xa kukho i-gradient yobushushu. Ixesha elihlala lihleli lobushushu letafile yegranite etyebileyo nexineneyo lide kakhulu - kuthatha iiyure ezininzi ukuba isiphumo esipheleleyo sokuphazamiseka kobushushu sibonakale - kodwa xa ukuguquguquka kumiselwe, kuyaqhubeka ixesha elide elifanayo emva kokuba umthombo wobushushu ususiwe.
Ukunciphisa okuqhelekileyo kukwahlulwa ngokufanelekileyo kwetafile yegranite yeCMM ukusuka kumgangatho — kusetyenziswa izixhobo zokwahlula ukungcangcazela ezikwabonelela ngokwahlulwa kobushushu — kunye nokubekwa kweCMM kwindawo ezinzileyo kubushushu kude nemithombo yobushushu kunye neendonga zangaphandle.
Ukuqhekeka kunye nokuphumla kwiLitye Elidala Kangako
I-granite engakavuthwa ngokwaneleyo kwaye ingakhange iphelelwe ngumthwalo ngaphambi kokwenziwa kwe-machining ngokuchanekileyo ingaqhubeka iphumla kancinci emva kokuthunyelwa, nto leyo ebangela ukuba umphezulu ofakwe kwi-machine ukhukuleke kwimo yawo echaziweyo kangangeenyanga. Le nkqubo ihlala icotha kwaye ivelisa amazinga okukhukuleka angaphantsi kwe-micrometer ngonyaka kwizinto ezicutshungulwe kakuhle - kodwa kwimeko yeemfuno zokuchaneka kwe-CMM engaphantsi kwe-micron, kwanolu khukuleka lucothayo lubalulekile kwiminyaka emininzi yokusebenza kwezixhobo zokuchaneka.
Isisombululo esifanelekileyo kukufumana ulwazi oluqinileyo ngezinto ezifikayo ngumvelisi wepleyiti yomphezulu, kuquka amaxesha amancinci okuguga kwezinto ezisikiweyo ngaphambi kokuba kuqalwe ukucutshungulwa ngokuchanekileyo. Umenzi otsiba eli nyathelo ukuze anciphise ixesha lokuvelisa uthengisa imveliso ebonakala ihambelana nokuhanjiswa kodwa yonakala xa isetyenziswa.
Ukugcina iitafile ze-CMM Granite zisebenza
Njengazo zonke izixhobo zokulinganisa ngokuchanekileyo, iipleyiti zomphezulu wegranite zeCMM zifuna ukulungiswa rhoqo kunye nokuqinisekiswa kwakhona ukuqinisekisa ukuba ziyaqhubeka nokuhlangabezana nobunzima bazo obuchaziweyo. Iindlela ezilungileyo zokugcina iitafile ze-CMM zegranite ziquka:
Ukubeka iliso kubushushu kunye namaxwebhu — Ukugcina irekhodi yemeko-bume yobushushu betafile kuchonga iindlela zokutsiba kwaye kunceda ukulungelelanisa ukungalingani kokulinganisa neziganeko zobushushu.
Ukucoca rhoqo — Umphezulu kufuneka ucocwe rhoqo ngezicoci ezifanelekileyo (i-pH engathathi cala, engarhawuzeliyo) ukususa amabala, iintsalela ze-coolant, kunye namaqhekeza arhabaxa anokubangela umonakalo kumphezulu. Umphezulu akufuneki ucocwe ngezinto ezirhabaxa.
Ukuqinisekiswa kwakhona kokuthe tyaba rhoqo — Ukuthe tyaba kufuneka kulinganiswe kwakhona ngokuchasene nesiqinisekiso sokuqala ukuze kubonwe naluphi na ukutyibilika okanye ukuguguleka. Indlela yokulinganisa kunye nesixhobo kufuneka zibhalwe phantsi kwaye zilandelelwe ngokwemigangatho efanayo nesiqinisekiso sokuqala.
Ukuphathwa ngononophelo kwezinto ezisindayo — Izinto ezisindayo okanye iinxalenye kufuneka zibekwe kakuhle kumphezulu wegranite kwaye zixhaswe kwiindawo ezilinganayo ukuze kuthintelwe ukulayisha iindawo ezinokuqhekeza imiphetho okanye zibangele uxinzelelo lwendawo.
Ukulungiswa kweetshiphu kunye nomonakalo — Iitshiphu kunye neendawo ezonakeleyo kufuneka zibhalwe phantsi kwaye zihlolwe. Iitshiphu ezincinci kwiindawo ezingezizo ezibalulekileyo zisenokungachaphazeli ukuchaneka komatshini ukuba zingaphandle kwendawo yokusebenza yeprobe. Iitshiphu kwiindawo zokulinganisa ezisetyenziswa kakhulu kufuneka zihlolwe ngokwebhajethi yeempazamo zomatshini ukuze kuchongwe ukuba kuyimfuneko na ukuphinda udibanise okanye ukutshintshwa.
ITheyibhile yeGranite njengenxalenye yoHlahlo-lwabiwo mali lokungaqiniseki komlinganiselo
I-ISO 10360, umgangatho wamazwe ngamazwe olawula uvavanyo lokusebenza kwe-CMM, ichaza indlela ukuchaneka komlinganiselo we-volumetric we-CMM ekufuneka kumiselwe kwaye kuchazwe ngayo. Lo mgangatho wahlula phakathi kokuchaneka komthamo we-CMM okuchaziweyo kunye nokungaqiniseki komlinganiselo opheleleyo osebenzayo kumsebenzi othile wokulinganisa.
Ukungaqiniseki okupheleleyo komlinganiselo we-CMM kuquka igalelo elivela:
- Ukuchaneka kwevolumu yeCMM (ukusuka kuvavanyo lwe-ISO 10360)
- Iimpazamo zokufaneleka kophando
- Iziphumo zokubambelela kunye nokulungisa iindawo
- Imiphumo yobushushu kwinxalenye nakumatshini
- Impazamo yesimo somphezulu wetafile yegranite
Eli galelo lokugqibela — impazamo yesimo setafile yegranite — lidla ngokushiywa kuhlalutyo olulula lokungaqiniseki, ingakumbi kwiindawo zemveliso apho kugxilwe kwixesha lomjikelo wenxalenye nganye kunohlalutyo lokungaqiniseki. Ukungayifaki kukhokelela ekungaqinisekini komlinganiselo okuchaziweyo okunethemba; iziphumo zokulinganisa zokwenyani ziqulathe inxalenye eyongezelelweyo yempazamo engabalulekanga.
Uhlahlo-lwabiwo mali olupheleleyo nolungqongqo lokungaqiniseki kokulinganisa — njengoko kufuneka yi-ISO/IEC 17025 kwiilabhoratri zokulinganisa ezivunyiweyo, kwaye njengendlela elungileyo yobunjineli kuyo nayiphi na isicelo sokulinganisa esibalulekileyo — kufuneka ibandakanye igalelo lomphezulu wetafile yegranite. Oku kufuna ukwazi ukuba itheyibhile ithambile kangakanani (kwi-calibration yakutshanje), kunye nokuqikelela indlela loo mpazamo yokuthambile ehambelana ngayo nokulinganisa okwenziwayo.
Isiphelo: Idatha Exhomekeke Kuyo Yonke Enye Into
I-CMM yinkqubo yokulinganisa, kwaye njengazo zonke iinkqubo zokulinganisa, ukuchaneka kwayo ekugqibeleni kuthintelwa kukuchaneka kwesalathiso sayo. Ipleyiti yomphezulu wegranite yileyo reference - ye-Z axis, ye-XY plane, yokufakela iindawo, kunye nokulinganisa yonke imaphu yeempazamo zejiyometri yomatshini.
Ukutyala imali ngokufanelekileyo kumgangatho wale ngxelo — ukucacisa umgangatho ochanekileyo, ukuqinisekisa umgangatho wezinto, ukuzigcina zisemgangathweni, kunye nokuzilungisa rhoqo — akuyonto iphambili. Yisiseko sokuthembeka komlinganiselo. Kwaye ukuthembeka komlinganiselo, kumashishini ukusuka kwi-aerospace ukuya kwizixhobo zonyango ukuya kwimveliso ye-semiconductor, sisiseko somgangatho wemveliso kunye nokhuseleko lomsebenzisi.
Ixesha leposi: Juni-26-2026