Momwe Mungasankhire Pakati pa Kuponya ndi Kupangira
Pakupanga zitsulo, njira ziwiri zomwe zimaganiziridwa kwambiri popanga zinthu ndi kupangira ndi kupanga zinthu. Ngakhale kuti zonsezi zimatha kupanga zinthu zovuta, zimakhala ndi kusiyana kwakukulu pa makhalidwe a makina, mtengo, kuchuluka kwa zinthu zomwe zapangidwa, ndi zofooka za kapangidwe kake. Kusankha njira yoyenera si nkhani yoti "ndi iti yolimba," koma nkhani yokhudzana ndi zofunikira za zinthu, zolinga za mtengo, ndi luso lopanga zinthu. Nkhaniyi ikufotokoza momwe mungasankhire pakati pa kupanga ndi kupanga zinthu.
1. Kumvetsetsa kusiyana kwakukulu komwe kumachitika mu ndondomekoyi
Kuponya ndi njira yopangira chitsulo mwa kusungunula zinthuzo kenako nkuzithira mu chikombole. Pambuyo poziziritsa ndi kulimbitsa, chigawocho chimachotsedwa mu chikombole ndipo nthawi zambiri chimafuna njira zinazake zomalizitsa kapena zopangira. Pali mitundu yosiyanasiyana ya kuponya, kuphatikizapo kuponya mchenga, kuponya ndalama, kuponya die, ndi kuponya kwa centrifugal.
Kupangira ndi njira yopangira chitsulo cholimba kudzera mu kusintha kwa pulasitiki pogwiritsa ntchito kupanikizika (kumenya kapena kukanikiza) pa kutentha kwina (kupangira kotentha, kupangira kotentha, kapena kupangira kozizira). Zipangizozo "zimakakamizidwa" kuti zigwirizane ndi mawonekedwe a die kudzera mu kuyenda kwa tirigu, zomwe nthawi zambiri zimawonjezera mphamvu ndi kulimba.
2. Zofunikira zazikulu: makhalidwe a makina ndi kudalirika
Ngati chinthu chanu chimafuna mphamvu zambiri, kukana kutopa, komanso kulimba, nthawi zambiri kupangira zinthu ndiye chisankho chabwino kwambiri. Izi zili choncho chifukwa kupanga zinthu kumapangitsa kuti zikhale zolimba kwambiri zomwe zimagwirizana ndi mawonekedwe a chinthucho, zomwe zimapangitsa kuti zikhale zolimba kwambiri komanso kuti zikhale zolimba. Zinthu monga ma crankshaft, ndodo zolumikizira, ma gear blanks, ndi zida zofunika kwambiri za injini nthawi zambiri zimapangidwa.
Mosiyana ndi zimenezi, zinthu zotayidwa zimatha kupanga zinthu zabwino zamakina, koma zimakhala zosavuta kugwidwa ndi zolakwika zamkati monga ma porosity (voids), shrinkage, inclusions, kapena hot cracks, makamaka ngati kuwongolera njira sikokhwima kwambiri. Mu ntchito zofunika kwambiri za kapangidwe kake (monga zigawo zotetezeka kwambiri), zinthu zotayidwa zimafuna kuwongolera kwambiri khalidwe ndi kuyang'aniridwa.
Mafunso otsogolera:
- Kodi gawoli lidzakumana ndi kutopa kwambiri?
– Kodi kulephera kwa zigawo zake n’koopsa (kofunikira kwambiri pa chitetezo)?
- Kodi kulimba kwambiri kumafunika pa kutentha kwinakwake kogwira ntchito?
Ngati yankho ndi “inde”, kupanga zinthu ndi kotetezeka kwambiri, ngakhale kuti kungakhale kokwera mtengo kwambiri.
3. Kuvuta kwa mawonekedwe ndi kusinthasintha kwa kapangidwe
Kuchokera pa kapangidwe kake, kuyika zinthu kumapambana kwambiri pakupanga ma geometri ovuta. Kuyika zinthu kumathandiza kupanga mabowo amkati, makoma opyapyala (m'njira zina), mawonekedwe achilengedwe, ndi zinthu zomwe zimakhala zovuta kapena zosatheka kupanga pogwiritsa ntchito forging. Mwachitsanzo, ma pampu, ma impeller, ma gearbox casing, kapena zigawo zokhala ndi njira zamkati nthawi zambiri zimakhala bwino kwambiri pakuyika zinthu.
Kupangira nthawi zambiri kumakhala ndi mawonekedwe omwe "amayenda" okha ndipo si ovuta kwambiri mkati. Ngakhale njira monga kupangira closed-die forging zimatha kupanga mawonekedwe ovuta, zimakhalabe ndi zoletsa monga ngodya yolowera, mzere wopatulira, ndi zofunikira pakuyenda kwa zinthu. Ngati kapangidwe kake kali ndi ma undercuts ambiri, ma canopy ovuta mkati, kapena makulidwe osiyanasiyana, kupangira kungakhale kosathandiza kapena kumafuna makina ambiri.
Mafunso otsogolera:
- Kodi pali mabowo ovuta amkati?
- Kodi mawonekedwe a chinthucho ndi ovuta kwambiri komanso ofotokoza bwino?
- Kodi makina okwana angati omwe akuvomerezekabe?
Ngati zinthu zovuta kwambiri, kupangira zinthu nthawi zambiri kumakhala kothandiza kwambiri.
4. Kulekerera ndi zofunikira pa khalidwe la pamwamba
Kawirikawiri, kupanga zinthu zomangira zinthu kumapanga kapangidwe kolimba komanso kogwirizana, koma kulekerera kwa "monga momwe zimakhalira" kumadalira njira. Zigawo zambiri zomangira zinthu zimafunikirabe makina kuti zikwaniritse miyeso yomaliza, makamaka m'malo olondola.
Kuyika kumakhala kosiyana malinga ndi mtundu wa zinthu:
– Kuponya zinthu pogwiritsa ntchito die casting kumatha kupanga malo osalala komanso kulekerera bwino zinthu zopanda chitsulo (monga aluminiyamu kapena zinki).
- Kuyika ndalama mu migodi kumadziwika kuti kumapereka zinthu zabwino komanso zolekerera bwino kuposa kuyika mchenga.
– Kupopera mchenga nthawi zambiri kumakhala ndi malo omasuka komanso okhwinyata.
Ngati chinthucho chikufuna kupirira bwino popanda makina akuluakulu, muyenera kuwunika mtundu woyenera wa kuponyera kapena kupangira—osati kungosankha chimodzi mwazonse.
5. Kuchuluka kwa kupanga ndi ndalama zogwiritsira ntchito zida
Zinthu zachuma nthawi zambiri zimakhala zomwe zimayambitsa mavuto.
Kuponya:
- Kugwiritsa ntchito zida kungakhale kotsika mtengo (monga kuponyera mchenga pogwiritsa ntchito mapatani osavuta).
- Yoyenera kugwiritsidwa ntchito pa zinthu zazing'ono mpaka zapakati komanso ndalama zochepa zoyambira.
- Komabe, mtengo pa unit iliyonse ukhoza kukwera ngati pali ntchito zambiri zomaliza kapena zowunikira.
Kupanga:
- Imafuna zida zodula kwambiri komanso zogwirira ntchito, makamaka zopangira zida zotsekedwa.
- Yoyenera kupanga zinthu zapakati mpaka zazikulu, chifukwa ndalama zogwiritsira ntchito zida zimatha kugawidwa m'mayunitsi ambiri.
- Nthawi zambiri zimapangitsa kuti pakhale zinthu zolimba zomwe zingachepetse mtengo wa kulephera kapena zopempha chitsimikizo mtsogolo.
Mafunso otsogolera:
- Kodi kuchuluka kwa zinthu zomwe mukufuna kupanga pachaka ndi kotani?
- Kodi chinthucho chidzasinthidwanso kapangidwe kake (kusintha pafupipafupi)?
- Kodi malire a ndalama zoyambira ndi ati?
Ngati kapangidwe kake kamasintha pafupipafupi, kupangira pogwiritsa ntchito zida zosavuta nthawi zambiri kumakhala kosinthasintha. Ngati kapangidwe kake ndi kokhwima ndipo voliyumu yake ndi yayikulu, kupangira kungakhale kotsika mtengo pakapita nthawi.
6. Zipangizo ndi zinthu zachitsulo
Sizinthu zonse zomwe zimachita zinthu mofanana.
- Ma alloy ena ndi osavuta kupangidwa chifukwa amakhala ndi madzi abwino ndipo kuchepa kwake kumatha kulamulidwa.
- Zipangizo zina zimakhala "zosavuta kupanga" chifukwa cha kusinthasintha kwake komanso kuthekera kwake kusintha bwino kutentha kwina.
Mwachitsanzo, zitsulo zambiri za kaboni ndi aloyi nthawi zambiri zimapangidwa kuti zigwiritsidwe ntchito pazida zolemera zamakina. Aluminiyamu imatha kupangidwa kapena kupangidwa—aluminiyamu yopangidwa nthawi zambiri imasankhidwa kuti igwiritsidwe ntchito pazida zomwe zimafuna chiŵerengero champhamvu kwambiri (monga ndege kapena magalimoto ogwira ntchito kwambiri).
Ngati mukugwiritsa ntchito chinthu china, onetsetsani kuti wogulitsa wanu kapena gulu lokonza zinthu akumvetsa mavuto omwe angakhalepo: kufooka kwa kutentha pamene mukuponya, kuuma kwa ntchito panthawi yopangira zinthu zozizira, kapena zofunikira pakukonza kutentha pambuyo pa ntchito.
7. Kuopsa kwa zolakwika, kuyang'anira ndi kuwongolera khalidwe
Kupangira nthawi zambiri kumakhala ndi chiopsezo chochepa cha ma porosity kuposa kuponya, chifukwa zinthuzo sizimauma kuyambira pamene zayamba kusungunuka. Komabe, kupanga kumakhala ndi mavuto omwe angakhalepo, monga kupindika, kudzaza pansi, kapena ming'alu chifukwa cha kusagwiritsidwa ntchito bwino.
Kuponya kumafuna kuyang'ana kwambiri pa kapangidwe ka ma geting system, risers, air ventilation, ndi temperature control kuti muchepetse zolakwika. Ngati zigawozo zili zofunika kwambiri, kuponya kungafunike kuwunika kosawononga (NDT) monga X-ray/CT scans, dye penetrant testing, kapena ultrasound testing kuti muwonetsetse kuti palibe zolakwika zamkati.
Ganizirani ndalama zowunikira ndi nthawi ngati gawo la ndalama zonse, osati ndalama zoyambira kupanga zokha.
8. Nthawi yopezera chithandizo ndi kupezeka kwa ogulitsa
Mu ntchito zamafakitale, kusankha nthawi zambiri kumatsimikiziridwa ndi:
- kupezeka kwa wogulitsa,
- mphamvu ya injini,
- nthawi yopangira zida,
- ndondomeko yotumizira.
Kupopera mchenga kungakhale kofulumira kwambiri popanga zinthu zofananira. Kupopera miyala kumafuna nthawi yayitali yopangira ndi kupanga, koma kupanga kwake kukakhala kokhazikika komanso mwachangu ngati zinthu zambiri zapezeka.
Ngati mukufuna nthawi yofulumira yogulitsira, kupanga zinthu kungakhale sitepe yoyamba, kenako pitirizani kupanga zinthu pamene kuchuluka kwa zinthu kukuwonjezeka ndipo kapangidwe kake kakhazikika.
9. Momwe mungasankhire: njira yosavuta
Kuti zisankho zikhale zokonzedwa bwino, gwiritsani ntchito njira zotsatirazi:
1. Fotokozani zofunikira pa katundu ndi zoopsa zolephera
Pamene zigawozo zikupirira katundu wamphamvu komanso chitetezo chili chofunikira, choyamba muyenera kusankha zomangira.
2. Kuwunika kwa zovuta za jiometri
Ngati kapangidwe kake ndi kovuta, kali ndi mabowo ambiri amkati, kapena zinthu zazing'ono, perekani ntchito yopangira zinthuzo.
3. Werengani chuma chonse
Yerekezerani ndalama zogwiritsira ntchito zida, ndalama zogwiritsira ntchito mayunitsi, makina, mitengo ya zinthu zotsalira, kuwunika, ndi ndalama zomwe zingawonongeke.
4. Ganizirani kuchuluka ndi kukhazikika kwa kapangidwe kake
Kupangira zinthu mosinthasintha pakupanga zinthu zazing'ono/kubwerezabwereza mwachangu. Kupangira zinthu bwino kwambiri pakupanga zinthu zazikulu/mapangidwe okhazikika.
5. Funsani akatswiri a njira kuyambira pachiyambi cha kapangidwe kake.
Mavuto ambiri a mtengo amabwera chifukwa cha mapangidwe omwe "sangathe kupangidwa." Kugwiritsa ntchito DFM (Design for Manufacturing) kuyambira pachiyambi kungathandize kuchepetsa ndalama zambiri.
Mapeto
Palibe yankho lachindunji la chomwe chili chabwino, kupangira kapena kupangira. Kupangira kumapambana pa mphamvu, kulimba, ndi kudalirika, pomwe kupangira kumapambana pakusintha kapangidwe ndi kuthekera kopanga mawonekedwe ovuta ndipo nthawi zambiri kumakhala kotsika mtengo pamitundu yaying'ono mpaka yapakati. Chisankho chabwino chimachokera pakugwirizana pakati pa zofunikira zaukadaulo, zolinga zamtengo, kuchuluka kwa zopangira, ndi kuthekera kwa unyolo woperekera.
Ngati mukufuna, ndingakuthandizeni kupanga tebulo loyerekeza la kuponyera motsutsana ndi kupanga la chikwama chanu (mtundu wa zinthu, kukula kwa gawo, ntchito, ndi kuchuluka kwa kupanga koyerekeza) kuti ndipereke upangiri wolondola kwambiri.
