I-granite straightedge "yindlela engabonakaliyo" yokuqinisekisa ukuchaneka kwimigca yemveliso yezixhobo zoomatshini.

I-granite straightedge "yindlela engabonakaliyo" yokuqinisekisa ukuchaneka kwimigca yemveliso yezixhobo zoomatshini. Izinto ezibalulekileyo eziqwalaselwayo zichaphazela ngokuthe ngqo uzinzo lomgca wonke wemveliso kunye nezinga lokufaneleka kwemveliso, ezibonakala kakhulu kwezi milinganiselo zilandelayo:
"Ukungatshintshi" kwesalathiso esichanekileyo
Ukufakelwa kunye nokuqaliswa kweendlela zesikhokelo sezixhobo zomatshini kunye neetafile zokusebenza kumgca wemveliso kufuneka kusekelwe kubuchule obuthe tye (≤0.01mm/m) kunye nokuhambelana (≤0.02mm/m) bomgca othe tye wegranite. Izinto zayo zendalo ezinoxinano oluphezulu (3.1g/cm³) zinokugcina ukuchaneka ixesha elide, kunye ne-thermal expansion coefficient ye-1.5×10⁻⁶/℃ kuphela. Nokuba umahluko wobushushu mkhulu kangakanani kwindawo yokusebenzela, awuyi kubangela ukuba ireferensi itshintshe ngenxa "yokwandiswa kobushushu kunye nokucutheka" - oku "kuzinza" iirula zesinyithi ezingenakufezekisa, ziphepha ngokuthe ngqo iimpazamo zokuhlanganisa izixhobo ezibangelwa ziireferensi ezingachanekanga.
2. "Umdlalo Wokuqina" Wokulwa nokungcangcazela kunye nokuNqaba
Indawo yomgca wemveliso iyinkimbinkimbi, kwaye kuqhelekile ukuba ii-coolant kunye nee-iron filings zitshize. Ubunzima obukhulu be-granite (enobunzima be-Mohs obuyi-6-7) buyenza ingakrweleki kwaye ayizukugqwala okanye ibole ngenxa yee-iron filings njenge-cast iron ruler. Kwangaxeshanye, inomoya onamandla wokufunxa ukungcangcazela kwendalo. Ngexesha lokulinganisa, inokunciphisa ukuphazamiseka kokungcangcazela okubangelwa kukusebenza kwesixhobo somatshini, yenze ukufundwa kwe-vernier caliper kunye ne-dial indicator kube kuzinzile ngakumbi kwaye kuthintelwe ukuphambuka komlinganiselo okubangelwa kukuguguleka kwesixhobo.

"Uhlengahlengiso lwe-lexile" kwiimeko
Imigca eyahlukeneyo yemveliso ineemfuno ezahlukeneyo zobude kunye nomgangatho wokuchaneka kwerula:

Kwimigca yemveliso yezinto ezincinci, khetha irula ye-0-grade enobubanzi obuyi-500-1000mm, elula kwaye ihlangabezana nemigangatho yokuchaneka.
Imigca yokudibanisa izixhobo zomatshini ezinzima ifuna iirula ezithe tye ezingama-2000-3000mm 00. Uyilo lomphezulu osebenza kabini lwenza ukuba kulinganiswe ngaxeshanye ukuhambelana kweereyile eziphezulu nezisezantsi zesikhokelo.

4. "Ixabiso Elifihliweyo" Lolawulo Lweendleko
Irula yegranite esemgangathweni ophezulu inokuhlala iminyaka engaphezu kwe-10, nto leyo ebiza kakhulu kwixesha elide kunerula yesinyithi (enomjikelo wokutshintshwa weminyaka emi-3 ukuya kwemi-5). Okubaluleke ngakumbi, inokunciphisa ixesha lokulungisa izixhobo ngokulinganisa ngokuchanekileyo. Umzi-mveliso othile wezixhobo zeemoto uxele ukuba emva kokusebenzisa iirula zegranite, ukusebenza kakuhle kotshintsho kunye nokulungisa imigca yomgca wemveliso kunyuke nge-40%, kwaye izinga leenkunkuma liye lehla ukusuka kwi-3% ukuya kwi-0.5%. Le yeyona nto ibalulekileyo "ekongeni imali nasekuphuculeni ukusebenza kakuhle".

Kwimigca yemveliso, iirula zegranite azizozixhobo zokulinganisa ezilula nje kuphela kodwa "ziigebenga ezichanekileyo". Ukukhetha efanelekileyo kuqinisekisa ukuzithemba komgangatho womgca wonke. Zizixhobo ezibalulekileyo zokulinganisa igranite kwimigca yemveliso echanekileyo yemizi-mveliso.