Bincike kan tasirin sauyin yanayin zafi a yanayi kan daidaiton ma'aunin daidaiton dandamalin granite.

A fannin auna daidaito, dandamalin daidaiton granite tare da kyakkyawan kwanciyar hankali, babban tauri da juriya mai kyau, ya zama tushen tallafi mai kyau ga ayyukan auna daidaito da yawa. Duk da haka, canjin yanayin zafi a cikin abubuwan muhalli, kamar "mai kisan daidai" da aka ɓoye a cikin duhu, yana da tasiri mara iyaka akan daidaiton ma'auni na dandamalin daidaiton granite. Yana da matukar muhimmanci a bincika matakin tasiri sosai don tabbatar da daidaito da amincin aikin aunawa.

Duk da cewa an san granite da kwanciyar hankali, ba ya da kariya daga canjin zafin jiki. Manyan abubuwan da ke cikinsa su ne quartz, feldspar da sauran ma'adanai, waɗanda za su samar da yanayin faɗaɗa zafi da matsewa a yanayin zafi daban-daban. Lokacin da zafin yanayi ya tashi, ana dumama da faɗaɗa tsarin daidaiton granite, kuma girman dandamalin zai ɗan canza kaɗan. Lokacin da zafin ya faɗi, zai koma yanayinsa na asali. Canje-canjen da suka yi kama da ƙananan girma za a iya ƙara su zuwa manyan abubuwan da ke shafar sakamakon aunawa a cikin yanayin aunawa daidai.

Idan aka ɗauki kayan aikin auna daidaito na gama gari da suka dace da dandamalin granite a matsayin misali, a cikin aikin auna daidaito na babban tsari, buƙatun daidaiton ma'auni sau da yawa suna kaiwa matakin micron ko ma sama da haka. Ana ɗauka cewa a yanayin zafin jiki na yau da kullun na 20℃, sigogi daban-daban na girma na dandamalin suna cikin yanayi mai kyau, kuma ana iya samun bayanai masu inganci ta hanyar auna aikin. Lokacin da zafin jiki na yanayi ya canza, yanayin ya bambanta sosai. Bayan adadi mai yawa na ƙididdigar bayanai na gwaji da nazarin ka'idoji, a ƙarƙashin yanayi na yau da kullun, canjin zafin muhalli na 1℃, faɗaɗa layi ko matsewar dandamalin daidaito na granite shine kusan 5-7 ×10⁻⁶/℃. Wannan yana nufin cewa ga dandamalin granite mai tsawon gefe na mita 1, tsawon gefe na iya canzawa da microns 5-7 idan zafin jiki ya canza da 1 ° C. A cikin ma'aunin daidaito, irin wannan canjin girma ya isa ya haifar da kurakuran aunawa fiye da kewayon da aka yarda.
Ga aikin aunawa da matakan daidaito daban-daban ke buƙata, matakin tasirin canjin zafin jiki shi ma ya bambanta. A cikin ma'aunin daidaito na yau da kullun, kamar auna girman sassan injina, idan kuskuren aunawa da aka yarda yana cikin ± microns 20, bisa ga lissafin ma'aunin faɗaɗawa da ke sama, ana buƙatar sarrafa canjin zafin jiki a cikin kewayon ± 3-4 ℃, don sarrafa kuskuren aunawa da canjin girman dandamali ya haifar a matakin da aka yarda. A cikin yankunan da ke da manyan buƙatun daidaito, kamar auna tsarin lithography a cikin kera guntu na semiconductor, an yarda da kuskuren a cikin ± 1 micron, kuma canjin zafin jiki yana buƙatar a sarrafa shi sosai a cikin ± 0.1-0.2 ° C. Da zarar canjin zafin ya wuce wannan iyaka, faɗaɗa zafin jiki da matsewar dandamalin granite na iya haifar da karkacewa a cikin sakamakon aunawa, wanda zai shafi yawan samar da guntu.
Domin magance tasirin sauyin yanayin zafi a yanayin zafi akan daidaiton ma'aunin dandamalin daidaiton dutse, ana ɗaukar matakai da yawa a cikin aiki na zahiri. Misali, ana shigar da kayan aikin zafin jiki mai daidaito mai ƙarfi a cikin yanayin aunawa don sarrafa canjin yanayin zafi a cikin ƙaramin kewayon; Ana gudanar da diyya ta zafin jiki akan bayanan aunawa, kuma ana gyara sakamakon aunawa ta hanyar algorithm na software bisa ga ma'aunin faɗaɗa zafi na dandamalin da canje-canjen zafin jiki na ainihin lokaci. Duk da haka, komai matakan da aka ɗauka, fahimtar tasirin canjin yanayin zafi a yanayin zafi akan daidaiton ma'aunin dandamalin daidaiton dutse shine ginshiƙin tabbatar da aikin aunawa daidai kuma abin dogaro.