Isimiso Sokusebenza Komshini Wokuhlanza I-Cryogenic Sichaziwe

By UMike Chen, Umqondisi Wokukhiqiza | Iminyaka eyi-12+ Ekukhiqizeni Irabha |I-LinkedIn

Izinto Ezibalulekile Okufanele Uzicabangele

• Umshini wokukhipha ukungcola obizwa nge-cryogenic ususa i-flash ngokuyiqandisa nge-nitrogen ewuketshezi kuze kube yilapho iqina, bese uyiphula ngomphetho wokuwa ngaphakathi kwe-roller ejikelezayo.
• Le nqubo iyasebenza ngoba i-flash encane iyaphola futhi iqhume ngokushesha kakhulu kunomzimba wengxenye ejiyile, ngakho i-flash iyaphuka ngenkathi ingxenye isinda.
• Amapharamitha amathathu alawula umphumela: izinga lokushisa lokusebenza (kufika ku-−150°C), isivinini se-roller (20–70 RPM), kanye nesikhathi sokujikeleza (ngaphansi kwemizuzu engu-8).
• Lesi isimiso esingokomzimba, esingathintani esisusa i-flash encane kakhulu ngaphandle kokusika amathuluzi, yingakho sifinyelela izinga lokudlula elingaphezu kuka-98% ezingxenyeni ezinembile.

Impendulo emfushane: Umshini wokukhipha ugesi obizwa ngokuthi i-cryogenic deflashing ususa i-flash kanye nama-burrs ngokusebenzisa ushintsho ekuziphatheni kwezinto ezisetshenziswayo ekushiseni okuphansi. Uqandisa izingxenye nge-nitrogen ewuketshezi kuze kube yilapho i-flash encane iba lukhuni futhi iqhekeke, bese uziphonsa ku-roller ejikelezayo ukuze umthelela uphule i-flash engxenyeni eqhubekayo. Kuyinqubo ebonakalayo, engathintani: akukho ama-blade, akukho ama-abrasives, akukho ukukhetha ngesandla.

Izindlela eziningi zokuqeda ziyasika, zigaye, noma zihlikihle izinto. I-cryogenic deflashing yenza okuhlukile: ishintsha izinto ngokwayo, yenza kube lula ukuphula i-flash engafuneki kunomkhiqizo enamathiselwe kuwo. Isimiso sizwakala njenge-physics kunokuba kube yi-machining, futhi yilokho kanye okuyikho.

Lo mhlahlandlela uchaza isayensi ngemuva kwale nqubo, uhamba ngomjikelezo womshini isinyathelo ngesinyathelo, uhlukanisa izingxenye ezibalulekile kanye namapharamitha, futhi ucacise ukuthi kungani i-flash iphuka kuyilapho ingxenye isinda. Uma wake wazibuza ukuthi umshini ungawuhlanza kanjani ingxenye ngaphandle kokuthinta ingxenye, nansi impendulo.

Kuyini Ukuhlanza I-Cryogenic?

Ukususa i-cryogenic deflashing kuyinqubo yokuqeda esusa i-flash, ama-burrs, kanye ne-parting-line excess ezingxenyeni ezibunjiwe ngokuzipholisa ziye emazingeni okushisa acwebezelayo ukuze izinto ezincane ezingeziwe ziqhekeke, bese kusetshenziswa i-mechanical impact ukuphula leyo flash eqhekekayo.Igama elithi “cryogenic” libhekisela ekusetshenzisweni kwamazinga okushisa aphansi kakhulu, ngokuvamile alethwa yi-nitrogen ewuketshezi.

Ngokungafani nokususa uthuli ngomshini, okusebenzisa umgqomo ojikelezayo futhi ngokuvamile isenzo sokusika noma sokugaya, ukususa uthuli ngomshini ocijile kusebenzisa okubandayo njengethuluzi eliyinhloko.Ngenxa yokuthi inqubo ayicindezeli i-blade engxenyeni, isusa ukukhanya emininingwaneni emincane, emaphethelweni angaphakathi, kanye nezimo eziyinkimbinkimbi ithuluzi lokusika elingenakuzifinyelela.Yingakho isibe yindinganiso yezivalo zokunemba, izingxenye ezincane zezindiza, kanye nezingxenye ze-microelectronic.

I-Fiziksi Engemuva Kwenqubo

Yonke indlela isekelwe kusakhiwo esisodwa sezinto ezibonakalayo: izinga lokushisa lokushintsha kwengilazi, noma i-Tg.Ngaphezu kwe-Tg yayo, inhlanganisela yerabha ithambile futhi iyanwebeka; ngaphansi kwayo, into efanayo iba lukhuni, ibe yingilazi, futhi iqhekeke.I-Tg eqondile iyahlukahluka ngokwenhlanganisela—irabha yemvelo kanye nezinto eziningi zokwenziwa ziyaqhekeka uma zingaphansi kuka-0°C, kuyilapho i-silicone ihlala iguquguquka uma kubanda kakhulu—kodwa lesi simiso sisebenza kuwo wonke ama-elastomer.

Nansi ukuqonda okubalulekile okwenza inqubo ikhetheke.I-Flash incane futhi ilula, ngakho-ke ayinasisindo sokushisa esincane kakhulu futhi iphola ibe ngaphansi kwe-Tg yayo cishe ngokushesha uma itholakala ku-nitrogen ewuketshezi.Umzimba wengxenye eyinhloko ujiyile futhi usinda, ngakho-ke ubamba ukushisa okwengeziwe futhi uhlala ngaphezu kwephuzu lawo lokuphuka isikhathi eside. Esikhathini esifushane izingxenye ezisichitha ku-roller, i-flash iyaqina kuyilapho ingxenye igcina ukuqina okwanele ukusinda emshayweni olandelayo.

I-nitrogen ewuketshezi ingumthombo wokuqandisa ngoba ibanda kakhulu—ibila cishe ku-−196°C—futhi ayibizi. Umshini uyayijova ukuze ushayele igumbi eligoqekayo liye ezingeni lokushisa lokusebenza elingu-−150°C, izinga lokushisa eliphansi ngokwanele ukuba likhanye ngokushesha ngenkathi kushiya iwindi lenqubo yomqhubi lilawuleka.

Indlela Umshini Osebenza Ngayo, Isinyathelo Ngesinyathelo

Umjikelezo womshini ulula ukuwusebenzisa kodwa kuncike esikhathini esinembile kanye nokushisa. Nansi indlela elandelanayo ngaphakathi komshini ojwayelekile wokuhlanza i-cryogenic:

1. Layisha inqwaba.Izingxenye zilayishwa ekamelweni eligoqekayo, elithwala kufika ku-80 L—cishe u-15–20 kg womkhiqizo kuye ngokuthi izingxenye zimi kanjani.
2. Pholisa igumbi.I-nitrogen ewuketshezi ifakwa ukuze kwehliswe izinga lokushisa le-roller liye endaweni yokusebenza kwayo engu-−150°C. Umthamo wesiqandisi olinganiselwe ngu-1.1 kW usiza ukugcina izinga lokushisa lizinzile phakathi nomjikelezo.
3. Gcoba i-flash.I-flash encane iphola idlule izinga lokushisa layo lokushintsha kwengilazi bese iphenduka iqine futhi iqhekeke, kuyilapho ingxenye yomzimba ejiyile ihlala ithambile.
4. Ukudilika nokuphahlazeka.I-roller ijikeleza ku-20-70 RPM, iwisa izingxenye ukuze zithintane kanye nesigubhu. Amandla okushaya asusa ukukhanya okubuthakathaka emgqeni wokuhlukanisa.
5. Linda isikhathi somjikelezo.Umjikelezo ogcwele uthatha imizuzu engaphansi kwengu-8—ude ngokwanele ukususa i-flash, umfushane ngokwanele ukuvimbela ingxenye ukuthi iphole kuze kube yilapho yonakala.
6. Khulula bese uhlukanisa.Izingxenye ezisusiwe ziyaphuma kanye nezingcezu ze-flash eziphukile, ezibe sezihlukaniswa nomkhiqizo oqediwe.

Qaphela okungekho: akukho blade, akukho media yokuklwebheka, futhi akukho opharetha ofinyelela enkambisweni.Ngenxa yokuthi amandla okususa asetshenziswa yizingxenye ngokwazo eziwayo, umshini usika yonke indawo ngendlela efanayo, okuhlanganisa ukunqunywa okungaphansi kanye nemiphetho yangaphakathi.

Izingxenye Eziyinhloko Nezindima Zazo

Ingxenye ngayinye emshinini wokuhlanza i-cryogenic ihambisana nesinyathelo esisodwa sesimiso. Ukuqonda izindima kwenza inqubo ibe lula ukuyilungisa nokuyixazulula.

Imininingwane evela ku-umshini wokuhlanza i-nitrogen cryogenic owuketsheziikhasi lomkhiqizo.

Ubukhulu bomshini obuncane—obungaba ngu-1200 mm ubude no-2000 mm ububanzi no-1200 mm ukuphakama, obunesisindo esingu-200 kg—busho ukuthi yonke le nqubo ingena ekhoneni elincane ngokumangalisayo legumbi lokuqeda.

Kungani I-Thin Flash Breaks Futhi Ingxenye Isinda

Ukukhetha kwe-cryogenic deflashing yisona sizathu esenza ithembeke ekusebenzeni ngokunemba, futhi kufanelekile ukuyiqonda ngokuningiliziwe ngoba yikona okuvimbela inqubo ekubhubhiseni ingxenye kanye ne-flash.

Ukungaqini kuhamba phakathi kwezinto ngokuhamba kwesikhathi, futhi izingxenye ezincane zifinyelela esimweni sokuqhekeka ngaphambi kokuba izingxenye ezijiyile zifinyelele.I-flash, evame ukuba yingxenyana yemilimitha ubukhulu, iphola nge-Tg yayo cishe ngokushesha. Ingxenye yomzimba, ekhulu kaningana, iphola kancane ukusuka ebusweni kuya ngaphakathi. Phakathi nomjikelezo omfushane, i-flash igcwele amathe ngenkathi ingxenye engaphakathi—futhi ngokuvamile indawo yayo yokusebenza—ihlala ithambile ngokwanele ukumunca umthelela wokuwa ngaphandle kokuqhekeka.

Yingakho isikhathi somjikelezo sibaluleke kangaka.Sebenzisa umjikelezo isikhathi eside kakhulu bese ingxenye ngokwayo iphola ngaphansi kwe-Tg yayo bese iba buthakathaka, lapho ukugoba okususa i-flash kuqala ukuphula umkhiqizo.Yisebenzise imfushane kakhulu futhi i-flash ayikakabonakali, ngakho-ke iyanwebeka esikhundleni sokuqhekeka. Iwindi lomjikelezo elingaphansi kwemizuzu engu-8 lihlelwe ukuthi lihlale phakathi kwalezo ziphazamiso ezimbili.

Amapharamitha Omjikelezo Nalokho Akulawulayo

Ama-dial amathathu—izinga lokushisa, isivinini, nesikhathi—anquma ukuthi inqubo isusa i-flash kahle noma yonakalise izingxenye. Zilungise ndawonye, ​​hhayi zodwa.

Izilungiselelo ezifanele zincike ku-Tg ehlanganisiwe, ukujiya kwengxenye, kanye ne-geometry ye-flash. Ukulungisa kahle umsebenzi owenziwa ngomkhiqizo ngamunye, hhayi ukusetha okukodwa.

Ngenxa yokuthi izinga lokushisa lokuqhekeka eliqondile liyahlukahluka ngokwenhlanganisela, isethi yamapharamitha afanele ihlukile ngerabha yemvelo, i-NBR, i-FKM, kanye ne-silicone.Ukuziphatha kokubuthaka kwerabha ngokwako kuyisilinganiso esijwayelekile—i-ASTM D2137 kanye ne-ISO 812 zichaza izindlela zokunquma iphuzu lokubuthaka kwenhlanganisela yerabha—okuyinkomba ewusizo lapho kusungulwa ifasitela lokushisa lomkhiqizo omusha.

Izinto Ezifanelekela Ukuhlanza Okungcolile Kwe-Cryogenic

Le nqubo isebenza noma kuphi lapho i-flash ingenziwa ibe buthakathaka khona kunengxenye.Kuyindlela ekhethwayo yezingxenye zerabha nepulasitiki ezinembile, futhi iphatha nezinhlobo ezahlukene zezingxenye zensimbi ezibunjiwe.

Izicelo ezijwayelekile zifaka izingxenye zerabha eziyinkimbinkimbi, izingxenye ezincane zezindiza, izingxenye zerabha zezimoto, irabha yokwenziwa enembile, izingxenye zepulasitiki enembile, izingxenye ze-microelectronic, izingxenye ze-elekthronikhi eziyinkimbinkimbi, kanye ne-zinc, i-magnesium, noma i-aluminium die castings, kanye nezivalo zokunemba. Kulezi zingxenye, isimiso sokungathintani yisona sizathu: isusa ukukhanya okungenakufinyelelwa yi-blade futhi ishiye indawo ingathintekile.

Ukuze kube lula futhi kube nomthamo ophezulu we-O-ring noma i-silicone lapho kunzima khona ukufeza ukuphuka, ezinye izimiso zingase zifaneleke kangcono.ububanzi bomshini wokuhlanza irabhakufaka phakathi ezinye izindlela zamandla emishini kanye nomoya ezigwema ngokuphelele i-nitrogen ewuketshezi.

Izinkinga Ezivamile Nendlela Yokuzilungisa

Ukususa i-cryogenic deflashing kuyinqubo yokulungisa. Izinkinga eziningi zixazululwa ngokulungisa izinga lokushisa, isivinini, noma isikhathi—hhayi ngokufaka ezinye izingxenye esikhundleni sazo.

Isiphetho: Ukuhlanza Ngokushisa, Hhayi Ngethuluzi

Umgomo wokusebenza komshini wokukhipha ugesi obizwa nge-cryogenic deflashing ulula kakhulu: uqandisa i-flash ize ibe buthakathaka, bese uvumela umthelela wokuwa uyichithe engxenyeni esathambile. Akukho blade, akukho ukuklwebheka, akukho sandla. I-physics yenza lokho ithuluzi lokusika elingenakukwenza—ukufinyelela emininingwaneni emincane kanye nemiphetho yangaphakathi bese isusa i-flash ngokulinganayo ngaphandle kokuthinta indawo.

Le nqubo iyakhetha ngoba incike ku-thermal mass: i-flash encane iyaqhuma ngaphambi kokuba ingxenye ejiyile iqhume, futhi ifasitela lomjikelezo omfushane ligcina ingxenye iphephile. Izinga lokushisa, isivinini sokugoqa, kanye nesikhathi somjikelezo yizona zindlela ezintathu zokugcina inqubo ngaphakathi kwalelo fasitela.

Ngezingxenye zerabha, ipulasitiki, kanye nezingxenye ezifakwe ngomshini oqinile, lowo umehluko phakathi kokuqeda okusika umkhiqizo kanye nokuqeda okusika i-flash. Uma usuqonda lesi simiso, umshini uyayeka ukubukeka njengebhokisi elibandayo bese uqala ukubukeka njengenqubo elawulwayo nephindaphindwayo—leyo ongayilungisa, uyilinganise, futhi uyethembe.