Ngena kuyo nayiphi na ivenkile yoomatshini echanekileyo, ilebhu yokulinganisa, okanye indawo yokuhlanganisa iindiza kulo lonke elaseYurophu okanye eMntla Melika, kwaye uya kufumana umbono oqhelekileyo: ilitye elimnyama, elicwebezelayo legranite elisebenza njengesiseko esithuleyo sokulinganisa okubalulekileyo. Le yiGranite Surface Plate—ilitye lesiseko le-metrology kangangeminyaka engaphezu kwesiqingatha senkulungwane. Kodwa nantsi imibuzo embalwa ebuzwayo: ingaba elo cwecwe linikezela ukuchaneka elaliyilelwe kona, okanye ukusebenza kwalo kuyaphazamiseka kancinci yindlela elifakwe ngayo, elixhaswa ngayo, neligcinwa ngayo?
Inyaniso yile,Ipleyiti yomphezulu weGraniteayisiyonto nje ilitye elithe tyaba. Yinto eyenziwe ngobuchule—umzekelo obonakalayo wenyaniso yejiyometri. Sekunjalo abasebenzisi abaninzi bayiphatha njengefenitshala: ibotshelelwe kwisakhelo esibuthathaka, ibekwe kufutshane nomthombo wobushushu, okanye ishiywe ingalungiswanga iminyaka emininzi phantsi kwengcinga yokuba “igranite ayitshintshi.” Nangona kuyinyani ukuba igranite inika uzinzo olukhethekileyo xa ithelekiswa neentsimbi, ayinangxaki kwiimpazamo. Kwaye xa idibene nezixhobo ezibuthathaka ezifana neegeyiji zokuphakama, izalathisi zedayile, okanye ii-comparators ze-optical, nokuba ukuphambuka kwe-10-micron kunokungena kwiingcamango ezingalunganga ezibizayo.
Kulapho umahluko phakathi kwepleyiti engenanto kunye nenkqubo epheleleyo uba yinto ebalulekileyo. Ipleyiti yoMphezulu weGranite ene-stand ayisiyonto nje yokwenza kube lula—imalunga nokuthembeka kwe-metrological. I-stand ayisosincedisi; yinxalenye eyenziwe ngobunjineli eqinisekisa ukuba ipleyiti ihlala ithe tyaba, izinzile, kwaye ifikeleleka phantsi kweemeko zokwenyani. Ngaphandle kwayo, kwanegranite yodidi oluphezulu inokudilika, ingcangcazele, okanye itshintshe—iyeke yonke into ethathwa kuyo.
Masiqale ngezinto ezisetyenzisiweyo ngokwazo. I-granite emnyama ye-Metrology—edla ngokuvela kwiindawo zokumbiwa ezicociweyo, ezithomalaliswe kuxinzelelo eIndiya, eTshayina, okanye eScandinavia—ikhethwa ngenxa yesakhiwo sayo se-isotropic, ukwanda okuphantsi kobushushu (malunga ne-6–8 µm/m·°C), kunye neempawu zendalo zokufunxa. Ngokungafaniyo nentsimbi ephoswe ngesinyithi, egqwala, egcina uxinzelelo loomatshini, kwaye yanda ngokubonakalayo ngobushushu, i-granite ihlala ihambelana ngokwemilinganiselo kwiindawo eziqhelekileyo zokusebenzela. Yiyo loo nto imigangatho yamazwe ngamazwe efana ne-ASME B89.3.7 (US) kunye ne-ISO 8512-2 (yehlabathi) ichaza i-granite njengeyona nto ifanelekileyo yokubeka iipleyiti zomphezulu ezichanekileyo ezisetyenziswa ekulinganisweni nasekuhlolweni.
Kodwa izinto zodwa azanele. Cinga ngoku: iPlate yeGranite Surface Plate eqhelekileyo eyi-1000 x 2000 mm inobunzima obumalunga ne-600–700 kg. Ukuba ibekwe kumgangatho ongalinganiyo okanye kwisakhelo esingaqinanga, umxhuzulane wodwa unokubangela ukuphambuka okuncinci—ingakumbi embindini. Oku kuphambuka kusenokungabonakali emehlweni kodwa kulinganiswe nge-interferometry, kwaye kuyaphula ngokuthe ngqo ukunyamezeleka kokuthamba. Umzekelo, ipleyiti yeGrade 0 yobukhulu obunjalo kufuneka igcine ukuthamba ngaphakathi kwe-±13 microns kulo lonke umphezulu wayo ngokwe-ISO 8512-2. Ipleyiti engaxhaswanga kakuhle ingadlula loo nto—nokuba igranite ngokwayo yayidibene ngokugqibeleleyo.
Ngawo lawo amandla—kunye nesidingo—senjongo eyakhelweyoIpleyiti yomphezulu weGranitenge-stand. I-stand esemgangathweni ophezulu yenza okungaphezulu kakhulu kunokuphakamisa ipleyiti iye kubude obuqhelekileyo (ngesiqhelo yi-850–900 mm). Inika inkxaso ebalwe ngokuchanekileyo enamachaphaza amathathu okanye amanqaku amaninzi ehambelana namanqaku endalo epleyiti ukuthintela ukugoba. Ibandakanya ukubethelela okuqinileyo ukuze imelane nokugoba. Uninzi lubandakanya iinyawo ezidambisa ukungcangcazela okanye izikhonkwane zokwahlukanisa ukuzikhusela kwiingxaki ezithwalwa kumgangatho ezivela kumatshini akufutshane. Ezinye zide zibe nee-terminals zokumisa umhlaba ukuze zisuse i-static—ebalulekileyo kwizixhobo ze-elektroniki okanye kwiindawo zokucoca.
Apha eZHHIMG, sisebenze nabathengi ababecinga ukuba ipleyiti yabo yegranite "ilungile ngokwaneleyo" kuba yayibukeka igudile kwaye yayingaqhekekanga. Omnye umthengisi weemoto eMidwest ufumanise ukuba ukufundwa kokulungelelaniswa kwebhorethi okungahambelaniyo kwiimeko zothumelo. Emva kophando, ityala yayingeyiyo iCMM okanye umqhubi—yayiyifreyimu yentsimbi eyenziwe ekhaya eyayiguquguquka phantsi komthwalo. Ukutshintshela kwiPlate yeGranite Surface eqinisekisiweyo ene-stand, eyakhiwe ngokwezikhokelo ze-ASME, kwasusa utshintsho ngobusuku obunye. Izinga labo le-scrap lehle ngama-30%, kwaye izikhalazo zabathengi zanyamalala.
Enye into eqhelekileyo yokungalungi kukulinganisa. I-Granite Surface Plate—nokuba izimele okanye ifakelwe—kufuneka ihlengahlengiswe rhoqo ukuze ihlale ithembekile. Imigangatho icebisa ukulinganisa kwakhona rhoqo ngonyaka iipleyiti ezisetyenziswa ngokusebenzayo, nangona iilebhu ezichanekileyo zinokukwenza rhoqo emva kweenyanga ezintandathu. Ukulinganisa ngokwenene akusiso isitampu serabha; kubandakanya ukumapha amakhulu eenqaku kumphezulu kusetyenziswa amanqanaba e-elektroniki, ii-autocollimators, okanye ii-laser interferometers, emva koko kuvelisa imephu ye-contour ebonisa ukuphambuka kwe-peak-to-valley. Le datha ibalulekile ekuthobeleni i-ISO/IEC 17025 kunye nokulungela uphicotho.
Ukugcinwa kwayo kubalulekile. Nangona i-granite ingadingi i-oyile okanye ii-coating ezikhethekileyo, kufuneka icocwe rhoqo nge-isopropyl alcohol ukususa i-coolant residue, ii-metal chips, okanye uthuli olunokungena kwi-micro-pores. Ungaze ubeke izixhobo ezinzima ngqo kumphezulu ngaphandle kwee-protective pads, kwaye uphephe ukutsala ii-gage blocks—hlala uziphakamisa kwaye uzibeke. Gcina ipleyiti igqunyiwe xa ingasetyenziswa ukuthintela ungcoliseko oluvela emoyeni.
Xa ukhetha iGranite Surface Plate, jonga ngaphaya kobuhle bayo. Qinisekisa:
- Ibanga lokutyibilika (Ibanga 00 leelebhu zokulinganisa, Ibanga 0 lokujonga, Ibanga 1 lokusetyenziswa ngokubanzi)
- Isiqinisekiso se-ASME B89.3.7 okanye i-ISO 8512-2
- Imephu eneenkcukacha zokuthamba—hayi nje ingxelo yokupasa/yokusilela
- Imvelaphi kunye nomgangatho wegranite (iinkozo ezincinci, akukho zimfanta okanye imithambo ye-quartz)
Kwaye ungaze uyithathele phantsi istandi. Buza umthengisi wakho ukuba yenzelwe uhlalutyo lwesakhiwo, ukuba iinyawo zokulinganisa zifakiwe na, kwaye ukuba yonke indibano ivavanyiwe phantsi komthwalo. Kwi-ZHHIMG, yonke iGranite Surface Plate enestandi esiyihambisayo icwangciswa ngokwe-serial, iqinisekiswe nganye nganye, kwaye ihamba nesatifikethi esilandelekayo se-NIST. Asithengisi iislabs—sihambisa iinkqubo ze-metrology.
Kuba ekugqibeleni, ukuchaneka akubhekiselele ekubeni nezixhobo ezibiza kakhulu. Kuxhomekeke ekubeni nesiseko onokusithemba. Nokuba uhlola i-turbine blade, ulungelelanisa i-mold core, okanye ulinganisa uluhlu lwee-height gauges, idatha yakho iqala ngomphezulu ongaphantsi kwayo. Ukuba loo mphezulu awuthe tyaba ngokwenene, awuzinzanga, kwaye awunakulandeleka, yonke into eyakhelwe phezu kwawo iyakrokreleka.
Ngoko ke zibuze: xa uthatha umlinganiselo wakho obaluleke kakhulu namhlanje, ngaba uqinisekile ngesalathiso sakho—okanye unethemba lokuba sisachanekile? Kwi-ZHHIMG, sikholelwa ukuba ithemba alilocebo lokulinganisa. Sikunceda utshintshe ukungaqiniseki ngokusebenza okuqinisekisiweyo—kuba ukuchaneka kokwenyani kuqala ukusuka ekuqaleni ukuya phezulu.
Ixesha leposi: Disemba-09-2025