Eminyangweni yokulawula ikhwalithi emhlabeni jikelele, umshini wokulinganisa ohlanganisiwe (i-CMM) uphethe isikhundla segunya. Lapho ingxenye yendiza esetshenzisiwe idinga ukuqinisekiswa ngokumelene nomdwebo wayo wobunjiniyela, lapho isethi yegiya lokunemba kufanele ihlolwe ngaphambi kokuhlanganiswa, lapho ukufakelwa kwezokwelapha kudinga isitifiketi sobukhulu ngaphambi kokuba kusetshenziswe enkambisweni yokuhlinzwa — i-CMM ngokuvamile iyisinqumo sokugcina. Ukulinganisa kwayo kunesisindo sokwethembeka kobuchwepheshe esithinta izinqumo ezithinta ukuphepha, ukusebenza, kanye nesibopho sezentengiselwano.
Kodwa-ke kuzo zonke izinto zobuchwepheshe eziyinkimbinkimbi, izikali zokunemba, kanye nesofthiwe eyinkimbinkimbi eyakha i-CMM yesimanje, isisekelo sokunemba komshini yitshe elincane. Ukuqonda ukuthi kungani - nokuqonda okwenzekayo lapho lelo tshe lingekho ezingeni elifanele - kwembula okuthile okubalulekile mayelana nendlela ukunemba kokulinganisa okufezwa ngayo ngempela ezinhlelweni zomzimba.
Lokho Okulinganiswa yi-CMM nokuthi Isebenza Kanjani
Umshini wokulinganisa ohlanganisayo ulinganisa ama-coordinate anama-three-dimensional amaphuzu entweni ebonakalayo. Lokhu ukwenza ngokuletha i-sensing probe ukuthintana (noma eduze, uma kwenzeka ama-non-contact scanning probes) ubuso bengxenye elinganiswayo, uqopha isikhundla se-XYZ sendawo ngayinye yokuxhumana, futhi ubale izici zejiyometri (ama-planes, ama-cylinder, ama-cone, izindawo ezikhululekile) ezifanelana kahle nefu lendawo elilinganisiwe.
Ukunemba kwale nqubo kuncike ezintweni eziningana ezisebenza ndawonye njengohlelo:
- Ukunemba kwezimbazo ezintathu eziqondile zomshini (ukuthi zihamba kahle kangakanani emigqeni eqondile, nokuthi izikhundla zazo zilinganiswa ngokunembile kangakanani ngabafaki bekhodi abaqondile)
- Ukunemba kanye nokuphindaphindeka kohlelo lwe-probe (ukuthi luqala kanjani njalo endaweni yokuxhumana nokuthi luchazwa ngokunembile kangakanani ukususwa kwalo endaweni yokufunda isikali)
- Ukuqina kokushisa kwesakhiwo somshini (ukugwema ukwanda okuhlukile phakathi kwezingxenye ezahlukene)
- Ikhwalithi yendawo yokubhekisela yedatha (indawo eyisicaba lapho zonke izilinganiso ze-Z-axis zivela khona futhi lapho kusekelwa khona i-geometry yomshini)
Lesi sici sokugcina — indawo yokubhekisela ye-datum — yipuleti lobuso be-granite lapho kwakhiwe khona i-CMM. Emiklamo eminingi ye-CMM, ipuleti lobuso be-granite aliyona nje itafula elingasebenzi lapho umshini uhlala khona. Liyingxenye esebenzayo yesistimu yokulinganisa. Imvelaphi yesikali se-Z-axis se-CMM ichazwa maqondana nale ndawo; izindlela zokuqondisa zama-axes avundlile omshini zifakwe futhi zithola ukunemba kwazo kule ndawo; ingxenye elinganiswayo ihleli kule ndawo (noma ku-fixture efakwe kuyo). Noma yiliphi iphutha ekusithekeni noma ekuzinzeni kwesikhathi eside kwepuleti le-granite lisakazeka ngqo kuma-coordinates abikwa yi-CMM.
Ipuleti Lomphezulu Wegranite njengeDatum Zero
Ku-metrology yakudala, i-datum iyisici esiqondile ngokwemfundiso (iphuzu, i-axis, noma indiza) lapho kuthathwa khona izilinganiso. Ezweni elingokoqobo le-CMM, i-datum plane ingaphezulu kwepuleti lobuso le-granite.
Uma umenzi we-CMM elinganisa umshini omusha, usebenzisa ubuso betafula le-granite njengereferensi yokusungula uhlelo lwangaphakathi lomshini. Ngokuqondile:
- Ubuso betafula buchaza indiza ye-XY yesistimu yokuxhumanisa yomshini
- Ibhuloho noma i-gantry vertical axis (Z) ye-CMM ibhekiselwa kule ndiza
- Ukuqondakala kwezingqimba ezivundlile (X no-Y) kulinganiswa futhi kunxeshezelwe uma kuqhathaniswa nesimo sangempela sobuso betafula.
Lokhu kulinganiswa kugcinwa njengethebula lesinxephezelo sejiyometri ngaphakathi kwesilawuli se-CMM. Uma umshini ulinganisa ingxenye, lokhu kulinganiswa okugciniwe kulungisa amaphutha ahlelekile ekuhambeni komshini - amaphutha alinganiswa futhi achazwa maqondana nobuso be-granite ngesikhathi sokulinganiswa.
Uma ipuleti lobuso begranite lishintsha isimo kamuva — ngokuguguleka, ukuthambekela kokushisa, noma ukukhululeka kokucindezeleka kwangaphakathi — ithebula lesinxephezelo alisachazi kahle i-geometry yomshini. Kubonakala sengathi i-CMM isebenza kahle (iyahamba, i-probe ibangela, izilinganiso ziyabikwa) kodwa izilinganiso ziqukethe amaphutha ahlelekile anda njengoba isimo segranite siwohloka. Lawa maphutha ayimfihlo kakhulu ngoba awahleliwe — ahlobene ngokwendawo, abonakala njengobandlululo oluhlelekile ezindaweni zethebula lapho kuvele khona iphutha lefomu.
Ukukhethwa KwamaBanga Kwezicelo ze-CMM
Akuzona zonke izinhlelo zokusebenza ze-CMM ezidinga izinga elifanayo le-ipuleti lobuso begranite, kodwa ukukhetha kufanele kuqhutshwe yizidingo zokungaqiniseki zokulinganisa zesicelo, hhayi intengo yokuthenga yethebula.
Ama-CMM Abhekiselayo kanye namaLabhoratri Okulinganisa
Ama-CMM asetshenziswa njengemishini yokubhekisela — ukulinganisa amanye ama-CMM, ukuqinisekisa izinto zobuciko zokubhekisela, noma ukusebenza njenge-anchor yokulandelela uhlelo lokulinganisa — ngokuvamile adinga ibanga 00 (ibanga lelebhu nge-DIN 876) noma ibanga lelebhu nge-ASME B89.3.7. Lawa amapuleti obuso ebanga eliphakeme kakhulu akhiqizwa kwezentengiselwano, anokubekezelelana okuyisicaba ebangeni eliphansi le-micrometer yedijithi eyodwa phezu kobuso betafula eligcwele.
Kuleli zinga, ubuso betafula le-granite kumele buphinde buqinisekiswe futhi buqinisekiswe kabusha ngezikhathi ezithile, kanti izilinganiso zingalandelelwa ngokwezindinganiso zikazwelonke. Isikhathi sokufaneleka kabusha sincike ekuqineni kokusetshenziswa kanye nokubaluleka kwezilinganiso, kodwa ngokuvamile siba minyaka yonke noma kabili ngonyaka.
Ukuhlolwa Kwephansi Lokukhiqiza Ama-CMM
Ama-CMM asetshenziswa ekuhlolweni kokukhiqiza — okuqinisekisa ukuthi izingxenye ezifakwe ngomshini ziyahlangabezana nezimfuneko zobukhulu ngaphambi kokuhlanganiswa — ngokuvamile asebenza namapuleti obuso ebanga 0 noma lebanga 1. Izidingo zokungaqiniseki kokulinganisa zokuhlolwa kokukhiqiza zikhululekile kakhulu kunomsebenzi wokulinganisa, futhi ngokufanayo, izidingo zokuthamba etafuleni le-granite aziqinile kangako.
Kodwa-ke, "ukukhululeka kakhudlwana" kusamele kuqondwe ngokomongo wokubekezelelana kwezingxenye okuhlolwayo. Uma kusetshenziswa i-CMM yokukhiqiza ukuqinisekisa izici ezinezimo zokubekezelelana ezingu-10-20 μm, ipuleti lobuso lebanga loku-1 (elinobucaba ebangeni elingu-5-10 μm phezu kwetafula eliphakathi nendawo) kufanelekile. Ukusebenzisa ipuleti lobuso lebanga lesi-2 noma lebanga le-workshop kulolu hlelo lokusebenza kuyingozi yokuthi iphutha lefomu lethebula linikele engxenyeni enkulu yokungaqiniseki kokulinganisa okuphelele.
Ama-CMM Amancane Ezinto Zogesi Nezokukhanya Okuqondile
Emikhakheni yokukhiqiza ama-elekthronikhi kanye ne-precision optics, ama-CMM amancane asetshenziswa ukukala izici ezingeni le-micrometer kanye ne-sub-micrometer ezingxenyeni ezifana nezindawo zokuxhuma, ama-optical mounts, kanye nemizimba yekhamera enziwe ngomshini wokunemba. Lezi zinhlelo zokusebenza zidinga amapuleti obuso ebanga le-00 - futhi, kwezinye izimo, amatafula e-granite alawulwa ngokushisa - ukuze kufezwe ukungaqiniseki kokulinganisa okudingekayo.
Izindlela Zokwehluleka Ezivamile: Yini Engahambi Kahle Uma Ikhwalithi Yegranite Inganele
Imiphumela yokucacisa noma yokwamukela i-granite yekhwalithi enganele ku-CMM ibonakala ngezindlela eziningana zokwehluleka ezihlukile:
I-Systematic Positional Offset Ezindaweni Ezisetshenziswa Kakhulu
Isikhungo setafula le-CMM, kanye nezindawo ezingaphansi kwezindawo ezisetshenziswa kakhulu, zithola ukuminyana okuphezulu kokuxhumana kwe-probe kanye nenani elikhulu kakhulu lemijikelezo yokulayisha izingxenye. Ngokuhamba kwesikhathi, lezi zindawo zingakhula ukuguguleka okulinganiselwe, okukhiqiza ukugoba okuncane. Itafula le-granite le-grade 0 noma le-grade 00 elenziwe kahle, elenziwe ngezinto eziqinile, eliqinile, limelana nokuguguleka ngempumelelo. Itshe elisezingeni eliphansi - ikakhulukazi i-marble noma i-granite empunga ephansi - lithambile kakhulu futhi lithuthukisa amaphethini okuguguleka ngokushesha okukhulu.
Ezindaweni zokukhiqiza lapho indawo ethile yokubeka izinto isetshenziswa khona izikhathi eziyizinkulungwane ngenyanga, lokhu kuguga kunganqwabelana kuze kube sezingeni lokuthinta ukunemba kokulinganisa kungakapheli unyaka owodwa kuya kwemibili. Izimpawu zibonakala njengokubandlulula okuhle noma okubi okuhlelekile ku-Z-coordinate yezingxenye ezilinganiswe endaweni egugile — ukubandlulula okungase kungabonakali ngokushesha njengenkinga yokuguguleka kwetafula.
Ukuhlanekezelwa Kokushisa Okuvela Ekuthinteni Kwephansi
Amatafula e-granite e-CMM ezindaweni zokukhiqiza avame ukubekwa ngqo ezitezi zefektri ezihlangabezana nokuguquguquka kwezinga lokushisa — ikakhulukazi eduze kwezindonga zangaphandle, iminyango yedokhi yokulayisha, noma eduze kwemishini yokucubungula ekhiqiza ukushisa. Uma itafula le-granite lisondelene kakhulu nokushisa phansi okungalingani, ukushisa kugeleza ngokungalingani etafuleni, kudala ukuguquguquka kwezinga lokushisa okuphambukisa ubuso betafula.
I-granite ende kakhulu (njenge-granite emnyama enobukhulu obuphezulu) inokushisa okuphansi kanye ne-CTE ephansi kune-granite evamile empunga, okusho ukuthi isabela kancane kakhulu ekuphazamisekeni kokushisa futhi ayiphazamisi kangako uma kukhona i-gradient yokushisa. Isikhathi sokushisa setafula le-granite elijiyile, elinobukhulu side kakhulu - kuthatha amahora amaningi ukuthi kuvele umphumela ogcwele wokuphazamiseka kokushisa - kodwa uma ukuphazamisa sekuqinisekisiwe, kuqhubeka isikhathi eside esifanayo ngemva kokuba umthombo wokushisa ususiwe.
Ukunciphisa okujwayelekile ukuhlukaniswa okufanele kwetafula le-granite le-CMM phansi — kusetshenziswa izikhonkwane zokuhlukaniswa kokudlidliza eziphinde zinikeze ukuhlukaniswa kokushisa — kanye nokubekwa kwe-CMM endaweni ezinzile ngokushisa kude nemithombo yokushisa kanye nezindonga zangaphandle.
Ukucwila Nokuphumula Etsheni Elidala Kangangokwanele
I-granite engakagugi ngokwanele futhi engakaqedwa ukucindezeleka ngaphambi komshini wokulungisa ngokunemba ingaqhubeka nokuphumula kancane ngemva kokulethwa, okubangela ukuthi indawo efakwe umshini ikhukhuleke isuke esimweni sayo esibekiwe ezinyangeni eziningi. Le nqubo ivame ukuhamba kancane futhi ikhiqiza amazinga okukhukhuleka angaphansi kwe-micrometer ngonyaka ezintweni ezicutshungulwe kahle — kodwa ngokwezidingo zokunemba kwe-CMM engaphansi kwe-micron, ngisho nalokhu kukhukhuleka okuhamba kancane kubalulekile empilweni yenkonzo yeminyaka eminingi yemishini yokulungisa ngokunemba.
Ikhambi elifanele ukufaneleka okuqinile kwezinto ezingenayo ngumkhiqizi wepuleti lobuso, okuhlanganisa nezikhathi zokuguga ezincane zezinto ezisikiwe ngaphambi kokuba kuqale ukucubungula ngokunemba. Umenzi oweqa lesi sinyathelo ukuze anciphise isikhathi sokukhiqiza uthengisa umkhiqizo obonakala uvumelana nokulethwa kodwa onciphayo ekusetshenzisweni.
Ukugcina Amatafula e-CMM Granite Esebenza
Njengazo zonke izinto zokulinganisa ngokunemba, amapuleti obuso be-granite e-CMM adinga ukulungiswa njalo kanye nokufaneleka kabusha ukuqinisekisa ukuthi ayaqhubeka nokuhlangabezana nokuthamba kwawo okubekiwe. Imikhuba emihle yokulungisa amatafula e-granite e-CMM ifaka:
Ukuqapha izinga lokushisa kanye nemibhalo — Ukugcina irekhodi lendawo yokushisa yethebula kukhomba izitayela zokukhukhuleka futhi kusiza ukuhlanganisa ukungalingani kokulinganisa nemicimbi yokushisa.
Ukuhlanza okuvamile — Indawo kufanele ihlanzwe njalo ngezihlanzi ezifanele (i-pH engathathi hlangothi, engagugi) ukuze kususwe ama-swarf, izinsalela zokupholisa, kanye nezinhlayiya ezigugisayo ezingadala umonakalo endaweni. Indawo akufanele neze ihlanzwe ngezinto ezigugisayo.
Ukuqinisekiswa kabusha kokuthamba ngezikhathi ezithile — Ukuthamba kufanele kulinganiswe kabusha ngokuqhathanisa nesitifiketi sokuqala ukuze kutholakale noma yikuphi ukukhukhuleka noma ukuguguleka. Indlela yokulinganisa kanye nethuluzi kumele kubhalwe phansi futhi kulandelelwe ngezindinganiso ezifanayo nesitifiketi sokuqala.
Ukuphathwa ngokucophelela kwezinto ezisindayo — Izinto ezisindayo noma izingxenye kufanele zibekwe ebusweni be-granite ngobumnene futhi zisekelwe ezindaweni ezilinganisiwe ukuze kugwenywe ukulayisha amaphuzu okungase kuqhekeze imiphetho noma kubangele ukucindezeleka kwendawo.
Ukulungiswa kwama-chip kanye nomonakalo — Ama-chip nezindawo ezonakele kufanele kubhalwe phansi futhi kuhlolwe. Ama-chip amancane ezindaweni ezingezona ezibucayi angase angaphazamisi ukunemba komshini uma engaphandle kwendawo yokusebenza ye-probe. Ama-chip ezindaweni zokulinganisa ezisetshenziswa kakhulu kumele ahlolwe ngokwesabelomali samaphutha somshini ukuze kutholakale ukuthi kudingeka yini ukugoqa kabusha noma ukushintshwa.
Ithebula Le-Granite Njengengxenye Yesabelomali Sokungaqiniseki Sokulinganisa
I-ISO 10360, indinganiso yamazwe ngamazwe elawula ukuhlolwa kokusebenza kwe-CMM, icacisa ukuthi ukunemba kokulinganisa kwe-volumetric ye-CMM kufanele kunqunywe futhi kuvezwe kanjani. Indinganiso ihlukanisa phakathi kokunemba kwe-volumetric okushiwo yi-CMM kanye nokungaqiniseki okuphelele kokulinganisa okusebenza emsebenzini othile wokulinganisa.
Ukungaqiniseki okuphelele kokulinganisa kwe-CMM kuhlanganisa iminikelo evela ku:
- Ukunemba kwevolumu ye-CMM (kusukela ekuhlolweni kwe-ISO 10360)
- Amaphutha okufaneleka kokuhlola
- Imiphumela yokubopha izingxenye kanye nokulungisa
- Imiphumela yokushisa engxenyeni nasemshinini
- Iphutha lesimo sobuso betafula le-granite
Lo mnikelo wokugcina — iphutha lefomu letafula le-granite — uvame ukukhishwa ekuhlaziyweni okulula kokungaqiniseki, ikakhulukazi ezindaweni zokukhiqiza lapho kugxilwe khona esikhathini somjikelezo ngengxenye kunokuhlaziywa kokungaqiniseki. Ukungakwenzi kuholela ekungaqinisekini kokulinganisa okushiwoyo okunethemba; imiphumela yangempela yokulinganisa iqukethe ingxenye eyengeziwe yephutha engabalwanga.
Isabelomali esiphelele nesiqinile sokulinganisa ukungaqiniseki — njengoba kudingeka yi-ISO/IEC 17025 kuma-laboratory okulinganisa agunyaziwe, kanye nomkhuba omuhle wobunjiniyela kunoma yisiphi isicelo sokulinganisa esibucayi — kumele sifake umnikelo wobuso betafula le-granite. Lokhu kudinga ukwazi ukuthi itafula lisicaba kangakanani (kusukela ekulinganisweni kwamuva), kanye nokulinganisa ukuthi lelo phutha lokuba sicaba lihambisana kanjani nezilinganiso ezenziwayo.
Isiphetho: Idatha Okuxhomeke Kuyo Konke Okunye
I-CMM iyisistimu yokulinganisa, futhi njengazo zonke izinhlelo zokulinganisa, ukunemba kwayo ekugcineni kunqunyelwe ukunemba kwenkomba yayo. Ipuleti lobuso be-granite yilelo referensi - ye-axis ye-Z, yendiza ye-XY, yokufakwa kwezingxenye, kanye nokulinganiswa kwemephu yamaphutha ejiyometri yomshini wonke.
Ukutshala imali ngendlela efanele ekhwalithini yalesi sithenjwa — ukucacisa ibanga elifanele, ukuqinisekisa ikhwalithi yezinto ezibonakalayo, ukuyigcina kahle, nokuyiphinda uyifaneleke njalo — akulona icala. Kuyisisekelo sobuqotho bokulinganisa. Futhi ubuqotho bokulinganisa, ezimbonini kusukela ezindiza kuya kumadivayisi ezokwelapha kuya ekukhiqizweni kwe-semiconductor, kuyisisekelo sekhwalithi yomkhiqizo nokuphepha komsebenzisi.
Isikhathi sokuthunyelwe: Juni-26-2026