Mfundo Yogwirira Ntchito ya Makina Ochotsera Madzi Oipa a Cryogenic Yafotokozedwa

By Mike Chen, Mtsogoleri Wopanga | Zaka 12+ mu Kupanga Rabara |LinkedIn

Mfundo Zofunika Kwambiri

• Makina ochotsera kuwala kwa cryogenic amachotsa kuwalako mwa kuzizira ndi nayitrogeni yamadzimadzi mpaka itayamba kusweka, kenako n’kuphwanya ndi kugwa mkati mwa chozungulira.
• Njirayi imagwira ntchito chifukwa kuwala kochepa kumazizira ndipo kumatuluka mofulumira kwambiri kuposa thupi la gawo lokhuthala, kotero kuwalako kumasweka pamene gawolo likupulumuka.
• Magawo atatu amalamulira zotsatira zake: kutentha kogwira ntchito (mpaka −150°C), liwiro la roller (20–70 RPM), ndi nthawi yozungulira (osakwana mphindi 8).
• Iyi ndi mfundo yogwira ntchito, yosakhudza yomwe imachotsa flash yopyapyala kwambiri popanda zida zodulira, ndichifukwa chake imafika pamlingo wopitilira 98% pazida zolondola.

Yankho lalifupi: Makina ochotsera kuwala a cryogenic amachotsa kuwala ndi ma burrs pogwiritsa ntchito kusintha kwa kachitidwe ka zinthu pa kutentha kochepa. Amaundana ndi nayitrogeni yamadzimadzi mpaka kuwala kopyapyala kutakhala kolimba komanso kosweka, kenako amawagwetsa mu chozungulira chozungulira kotero kuti kugwedezekako kumaswa kuwalako kuchoka ku gawo lomwe silili lolimba. Ndi njira yeniyeni, yosakhudzana: palibe masamba, palibe zoletsa, kapena kutola ndi manja.

Njira zambiri zomalizira zimadula, kupukuta, kapena kupukuta zinthu. Cryogenic deflashing imachita zosiyana: imasintha zinthuzo zokha, zomwe zimapangitsa kuti kuwala kosafunikira kusweke mosavuta kuposa chinthu chomwe chalumikizidwa nacho. Mfundoyi ikumveka ngati fizikisi osati makina, ndipo ndicho chomwe chili.

Bukuli likufotokoza sayansi yomwe ili kumbuyo kwa njirayi, limafotokoza za kayendedwe ka makina pang'onopang'ono, limagawa zigawo ndi magawo ofunikira, ndikufotokozera chifukwa chake flash imasweka pamene gawolo likupulumuka. Ngati munayamba mwadzifunsapo momwe makina angachotsere gawo popanda kukhudza gawolo, yankho lake ndi ili.

Kodi Cryogenic Deflashing ndi Chiyani?

Kuchotsa zinthu zophwanyika pogwiritsa ntchito cryogenic deflashing ndi njira yomaliza yomwe imachotsa zinthu zophwanyika pogwiritsa ntchito flash, burrs, ndi parting-line excess kuchokera ku zinthu zopangidwa mwa kuziziziritsa mpaka kutentha kwambiri kotero kuti zinthu zophwanyika pang'ono zimaphwanyika, kenako nkugwiritsa ntchito makina kuti achotse flash yophwanyika.Mawu akuti "cryogenic" amatanthauza kugwiritsa ntchito kutentha kochepa kwambiri, komwe nthawi zambiri kumaperekedwa ndi nayitrogeni yamadzimadzi.

Mosiyana ndi makina ochotsera mpweya, omwe amagwiritsa ntchito mbiya yozungulira komanso nthawi zambiri kudula kapena kupukuta, cryogenic deflashing imagwiritsa ntchito kuzizira ngati chida chachikulu.Chifukwa chakuti njirayi siikankhira tsamba pa gawolo, imachotsa kuwala kuchokera kuzinthu zazing'ono, m'mphepete mwa mkati, ndi mawonekedwe ovuta omwe chida chodulira sichingafikire.Ichi ndichifukwa chake chakhala muyezo wa zisindikizo zolondola, zida zazing'ono zoyendera ndege, ndi zida zamagetsi.

Fiziki Yakumbuyo kwa Ndondomekoyi

Njira yonseyi imadalira pa chinthu chimodzi: kutentha kwa kusintha kwa galasi, kapena Tg.Pamwamba pa Tg yake, rabara imakhala yofewa komanso yotanuka; pansi pake, chinthu chomwecho chimakhala cholimba, chooneka ngati galasi, komanso chophwanyika.Tg yeniyeni imasiyana malinga ndi zinthu zina—labala lachilengedwe ndipo zinthu zambiri zopangidwa zimakhala zofooka kwambiri zikafika pa 0°C, pomwe silicone imakhala yosinthasintha ikafika pa kutentha kozizira—koma mfundo imeneyi imagwira ntchito pa ma elastomer onse.

Apa pali chidziwitso chofunikira chomwe chimapangitsa kuti njirayi ikhale yosankha.Kuwala ndi kopepuka komanso kopepuka, kotero kumakhala ndi kutentha kochepa kwambiri ndipo kumazizira mpaka pansi pa Tg yake pafupifupi nthawi yomweyo kukakhala ndi nayitrogeni yamadzimadzi.Thupi la gawo lalikulu ndi lolimba komanso lolemera, kotero limasunga kutentha kwambiri ndipo limakhala pamwamba pa malo ake ofooka kwa nthawi yayitali. Pakapita nthawi yochepa yomwe ziwalozo zimakhala mu roller, kuwala kumaphulika pomwe gawolo limasunga ductility yokwanira kuti lipulumuke kugwedezeka komwe kumabwera pambuyo pake.

Nayitrogeni yamadzimadzi ndi gwero la kuzizira chifukwa kuzizira kwambiri—kumawira pafupifupi −196°C—ndipo ndi kotsika mtengo. Makinawo amaikamo kuti achepetse kutentha kwa chipinda chozungulira kufika pa −150°C, kutentha kochepa kokwanira kung'anima mwachangu pamene zenera la wogwiritsa ntchito likusintha.

Momwe Makina Amagwirira Ntchito, Gawo ndi Gawo

Kuzungulira kwa makina ndi kosavuta kugwiritsa ntchito koma kumadalira nthawi yeniyeni komanso kutentha. Nayi njira yomwe ili mkati mwa makina wamba ochotsera madzi a cryogenic:

1. Kwezani gulu.Zigawo zimayikidwa mu chipinda chozungulira, chomwe chimatha kunyamula mpaka 80 L—pafupifupi 15–20 kg ya chinthucho kutengera kuchuluka kwa zigawozo.
2. Ziziritsani chipinda.Nayitrogeni yamadzimadzi imalowetsedwa kuti ichepetse kutentha kwa roller kufika pa malo ake ogwirira ntchito -150°C. Mphamvu yosungira mufiriji ya 1.1 kW imathandiza kuti kutentha kukhale kokhazikika panthawi ya kayendedwe kake.
3. Landirani kuwala.Kuwala kopyapyalako kumazizira kuposa kutentha kwake kwagalasi ndipo kumakhala kolimba komanso kofooka, pomwe gawo lokhuthala la thupi limakhalabe lofewa.
4. Gubudukani ndi kusweka.Chozunguliracho chimazungulira pa 20–70 RPM, ndikugwetsa ziwalozo kotero kuti zimagundana wina ndi mnzake komanso ng'oma. Mphamvu yogunda imachotsa kuwala kofooka pa mzere wolekanitsa.
5. Dikirani nthawi yonse ya kuzungulira.Kuzungulira konse kumatenga mphindi zosakwana 8—kutalika kokwanira kuchotsa flash, kochepa kokwanira kuti gawolo lisazizire mpaka kuwonongeka.
6. Tulutsani ndi kulekanitsa.Zigawo zochotsedwa zimatulutsa pamodzi ndi zidutswa zosweka, zomwe zimalekanitsidwa ndi chinthu chomalizidwa.

Onani zomwe palibe: palibe tsamba, palibe cholumikizira chogunda, komanso palibe wogwiritsa ntchito amene akuyang'ana njira yogwirira ntchito.Popeza mphamvu yochotsera imagwiritsidwa ntchito ndi ziwalo zomwe zimagwa, makinawo amadula malo onse mofanana, kuphatikizapo zodulidwa pansi ndi m'mbali mwa mkati.

Zigawo Zofunika ndi Ntchito Zawo

Chigawo chilichonse mu makina ochotsera madzi a cryogenic chimagwirizana ndi gawo limodzi la mfundoyi. Kumvetsetsa ntchito zake kumapangitsa kuti ntchitoyi ikhale yosavuta kusintha ndi kuthetsa mavuto.

Mafotokozedwe ochokera kumakina oyeretsera madzi a nayitrogeni cryogenic deflashingtsamba la malonda.

Kapangidwe kakang'ono ka makinawo—kakafupi mamita 1200 m'litali ndi mamita 2000 m'lifupi ndi mamita 1200 m'lifupi, kolemera makilogalamu 200—kumatanthauza kuti mfundo yonseyi ikugwirizana ndi ngodya yaying'ono kwambiri ya chipinda chomalizira.

Chifukwa Chake Kuphwanyika Kochepa Kumasweka Ndipo Chiwalo Chimapulumuka

Kusankha kwa cryogenic deflashing ndiko chifukwa chake imadziwika kuti imagwira ntchito molondola, ndipo ndiyofunika kumvetsetsa mwatsatanetsatane chifukwa ndiyo imalepheretsa njirayi kungowononga gawo limodzi ndi flash.

Kuphwanyika kwa zinthu kumadutsa m'zinthu pakapita nthawi, ndipo zigawo zoonda zimafika pamlingo wophwanyika zisanafike zigawo zokhuthala.Kuwala kumeneku, komwe nthawi zambiri kumakhala kokulirapo pang'ono ngati milimita imodzi, kumazizira nthawi yomweyo kudzera mu Tg yake. Thupi la gawolo, lokhuthala kangapo, limazizira pang'onopang'ono kuchokera pamwamba kupita mkati. Pa nthawi yochepa, kuwalako kumakhala kolimba kwambiri pomwe pakati pa gawolo—ndipo nthawi zambiri pamwamba pake pogwirira ntchito—pamakhalabe ductile mokwanira kuti igwire bwino ntchito popanda kusweka.

Ichi ndichifukwa chake nthawi yozungulira ndi yofunika kwambiri.Yendetsani nthawi yayitali kwambiri ndipo gawolo limazizira pansi pa Tg yake ndipo limakhala lofooka, pomwe kugwa komwe kumachotsa flash kumayamba kuphwanya chinthucho.Itha kuyimitsa kwakanthawi kochepa ndipo flash sinayambe kusweka, kotero imatambasuka m'malo modumpha. Nthawi yoyambira ya mphindi zosakwana 8 yakonzedwa kuti ikhale pakati pa zolephera ziwirizi.

Ma Parameter a Cycle ndi Zomwe Amalamulira

Ma dial atatu—kutentha, liwiro, ndi nthawi—ndi omwe amatsimikiza ngati njirayo ikuchotsa flash bwino kapena kuwononga ziwalo. Zisintheni pamodzi, osati padera.

Makonda abwino kwambiri amadalira Tg yophatikizika, makulidwe a magawo, ndi mawonekedwe a flash. Kukonza bwino ndi ntchito ya pa chinthu chilichonse, osati kukhazikitsa kamodzi kokha.

Popeza kutentha kwenikweni kwa kufooka kumasiyana malinga ndi zinthu zosiyanasiyana, seti yoyenera ya zinthuzo ndi yosiyana pa mphira wachilengedwe, NBR, FKM, ndi silicone.Khalidwe la kufooka kwa mphira palokha ndi muyeso wokhazikika—ASTM D2137 ndi ISO 812 amafotokoza njira zodziwira kufooka kwa mphira—zomwe ndi chitsanzo chothandiza pokhazikitsa zenera la kutentha kwa chinthu chatsopano.

Zipangizo Zoyenera Kuchotsa Madzi Oipa a Cryogenic

Njirayi imagwira ntchito kulikonse komwe flash ingapangidwe kukhala yolimba kuposa gawolo.Ndi njira yabwino kwambiri yopangira zinthu za rabara ndi pulasitiki, komanso imagwira ntchito zosiyanasiyana zopangidwa ndi zitsulo.

Ntchito zomwe zimagwiritsidwa ntchito nthawi zambiri zimaphatikizapo zida zovuta za rabara, zida zazing'ono zoyendera ndege, zida za rabara zamagalimoto, rabara yopangidwa mwaluso, zida zapulasitiki zolondola, zida zamagetsi zazing'ono, zida zamagetsi zovuta, ndi zinc, magnesium, kapena aluminiyamu, komanso zomatira zolondola. Pazigawo izi, mfundo yosakhudzana ndi izi ndi yakuti: imachotsa kuwala komwe tsamba silingathe kufikira ndikusiya pamwamba pake osakhudzidwa.

Kuti ntchito ya O-ring ikhale yosavuta komanso yokwera kwambiri kapena silicone komwe kufooka kumakhala kovuta, mfundo zina zingagwirizane bwino.makina ochotsera mphiraimaphatikizapo njira zina zamagetsi ndi mpweya zomwe zimapewa nayitrogeni yamadzimadzi konse.

Mavuto Ofala ndi Momwe Mungawakonzere

Kuchotsa zinthu zowononga mpweya pogwiritsa ntchito cryogenic deflashing ndi njira yosinthira zinthu. Mavuto ambiri amathetsedwa mwa kusintha kutentha, liwiro, kapena nthawi—osati kusintha ziwalo zina.

Kutsiliza: Kutulutsa mpweya pogwiritsa ntchito kutentha, osati chida

Mfundo yogwirira ntchito ya makina ochotsera kuwala kwa cryogenic ndi yokongola kwambiri: kuziziritsa flash mpaka itayamba kuphwanyika, kenako lolani kuti igwe pansi iwononge mbali yomwe ilibe ductile. Palibe tsamba, palibe kukwapula, kapena dzanja. Fiziki imachita zomwe chida chodulira sichingathe—kufika m'mbali zazing'ono ndi m'mphepete mwa mkati ndikuchotsa flash mofanana popanda kukhudza pamwamba.

Njirayi ndi yosankha chifukwa imadalira kutentha: kuwala kochepa kumatuluka mbali yokhuthala isanayambe, ndipo zenera lalifupi la kuzungulira limasunga gawolo kukhala lotetezeka. Kutentha, liwiro la roller, ndi nthawi ya kuzungulira ndi zinthu zitatu zomwe zimasunga njirayi mkati mwa zenera limenelo.

Pa zinthu zolondola za rabara, pulasitiki, ndi zotayidwa ndi die-cast, ndiye kusiyana pakati pa kumaliza komwe kumadula chinthucho ndi kumaliza komwe kumadula flash. Mukamvetsetsa mfundoyi, makinawo amasiya kuwoneka ngati bokosi lozizira ndipo amayamba kuwoneka ngati njira yolamulidwa, yobwerezabwereza—yomwe mungathe kusintha, kuyeza, ndi kudalira.