Zowonongeka Zobisika mu Aluminium Die Casting Parts: Katswiri Wowongolera Kuwongolera Kwabwino

Zowonongeka Zobisika Zazigawo za Aluminium Die Casting

Opanga chigawo cha kufa amakumana ndi vuto lawo lalikulu ndi zolakwika zobisika. Zolakwika zosawoneka izi zimatha kufooketsa kukhulupirika kwa kapangidwe kake, kuchepetsa magwiridwe antchito, ndikupangitsa kuti zigawo zilepheretse msanga. Akatswiri owongolera upangiri ayenera kumvetsetsa zolakwika izi pamlingo wocheperako kwambiri kuti zinthu zisamayende bwino.

 

Porosity: Chiwopsezo Chosawoneka pa Kukhulupirika Kwamapangidwe

Zing'onozing'ono kapena zibowo zomwe zili mkati mwachitsulo zimafooketsa mphamvu zamagulu mu zigawo za aluminiyamu. Zowonongeka izi, zomwe zimadziwika kuti porosity, zimapanga pafupifupi 5% ya kuchuluka kwa magawo. Gasi porosity ndi shrinkage porosity ndi mitundu iwiri ikuluikulu. Kuchuluka kwa mpweya kumawoneka ngati mabowo ozungulira, osalala omwe amapangika pamene mpweya utsekeredwa pamene chitsulo chikulimba. Izi zimachitika m'njira zingapo: haidrojeni imatuluka muzitsulo zosungunula, chipwirikiti chimachitika pakudzazidwa, kapena mpweya umachokera ku zinthu zotulutsa nkhungu.

Chitsulocho chimagwirizanitsa mosagwirizana panthawi yozizira ndipo chimapangitsa kuti shrinkage porosity ikhale yofanana. Ma voids awa amawoneka ngati aang'ono ndipo nthawi zambiri amawonekera mkati mwa magawo okhuthala omwe kusiyana kwa kutentha pakati pa pamwamba ndi pakati ndipamwamba kwambiri. Mitundu yonse iwiri ya porosity imapangitsa kuti magawowo akhale ofooka, osalimba mtima, ndikupanga njira zotayikira pazigawo zonse zoponyera aluminiyamu.

 

Cold Shuts ndi Flow Lines: Zopanda Ungwiro Zapamwamba

Kutsekera kozizira ndi zina mwa zolakwika zomwe zimapezeka m'zigawo za kufa. Mutha kuwawona ngati mizere yowoneka bwino, yosakhazikika, yolowera m'mphepete momwe amakumana. Zowonongeka izi zimachitika pamene mitsinje iwiri yachitsulo sichilumikizana bwino pakudzaza. Kuthamanga kwachitsulo kumagawanika kukhala zingwe zingapo, ndipo kutsogolo kwa mtsinje uliwonse kumapanga kutsogolo kolimba komwe sikungagwirizane ndi zitsulo zomwe zikubwera.

Kutentha kwachitsulo chosungunuka, kuwongolera kutentha kwa nkhungu, mapangidwe oyipa a zipata, komanso kuthamanga kwapang'onopang'ono kumabweretsa kuzizira. Zolakwika zam'mwambazi nthawi zambiri zimawonekera kumadera akutali kwambiri ndi zipata zomwe zimayendera zitsulo zingapo. Kutsekera kozizira sikungowoneka koyipa - kumapanga malo ofooka omwe amatha kusweka ndi kupsinjika kwamakina.

 

Kuwonongeka kwa Shrinkage: Zovuta za Dimensional

Chitsulo mwachibadwa chimagwirizanitsa pamene chikuzizira, chomwe chimayambitsa kuwonongeka kwa shrinkage panthawi yolimba. Mupeza zolakwika izi m'njira ziwiri: kutsika kotseguka pamtunda woponyedwa ndi kutsekeka kotseka mkati ngati voids. Maonekedwe aang'ono a shrinkage cavities amawasiyanitsa ndi mpweya wa porosity, ndipo nthawi zambiri amapanga nthambi zamkati zamkati.

Ziwalo zokhuthala za aluminiyamu zokhala ndi ngodya zingapo zimatha kukhala ndi vuto locheperako, makamaka ngati mawonekedwe olimba sakhala ofanana. Kapangidwe kake kozizira kozizira, kutsegula nkhungu msanga kwambiri, komanso kutentha kwambiri kumayambitsa mavutowa. Zigawo zokhala ndi miyeso iyi sizimangowoneka mosiyana komanso sizingafanane bwino pakuphatikiza.

 

Kuphatikizidwa kwazitsulo: Kuwonongeka kwazinthu Zakunja

Kuphatikizika kwazitsulo ndi mtundu wina wa cholakwika chobisika - tinthu tating'onoting'ono kapena zinthu zomwe zimawononga zitsulo panthawi yoponya. Mosiyana ndi gasi porosity, inclusions imachokera ku tinthu tolimba. Amawoneka ngati mabowo osawoneka bwino pamtunda kapena mkati mwazoponya ndipo amakhala ndi zinthu zakunja.

Mudzapeza mitundu yosiyanasiyana ya inclusions: slag kuchokera ku kusagwira bwino, ma oxides (makamaka aluminiyamu okusayidi), tinthu tating'onoting'ono, matope, ndi mawanga olimba. Ma aluminiyamu aloyi amakumana ndi zovuta zina zophatikizira intermetallic monga FeAl3 (chitsulo ndi aluminiyamu) chifukwa amawoneka komanso kumva mosiyana ndi zinthu zozungulira. Zowononga izi zimalowa m'malo oponyedwa kudzera mu ng'anjo yauve, kuyeretsedwa kosakwanira, kuchotsa koyipa, kapena kusweka kwa graphite kuchokera ku crucibles. Kuphatikizikako kumapangitsa kuti magawo azikhala pachiwopsezo cha zovuta zina, kuchititsa kukokoloka kwa nthaka, kufooketsa kapangidwe kake, ndikutha zida mwachangu pakukonza.

Njira Zowunikira Zofunikira za Die Cast Aluminium Parts

 

Magulu owongolera khalidwe amafunikira njira zowunikira mwapadera kuti apeze zolakwika m'zigawo za aluminiyamu zomwe zimafa. Njirazi zimathandiza kudziwa ngati magawo amakwaniritsa miyezo yapamwamba asanafikire makasitomala. Kuwongolera kwamtundu wabwino kumaphatikiza njira zosiyanasiyana kuti muwone zolakwika zamkati ndi zamkati.

 

X-ray ndi CT Scanning for Internal Detection

Kuwunika kwa X-ray kumakhalabe njira yabwino yowonera mawonekedwe amkati a zida za aluminiyamu popanda kuziwononga. Njirayi imasonyeza kusiyana kwa kachulukidwe kuchokera ku porosity, shrinkage cavities, ndi inclusions zomwe simungathe kuziwona ndi maso anu. Ma X-ray achikhalidwe amapanga zithunzi za 2D. Kusanthula kwa Advanced Computed Tomography (CT) kumatenga zithunzi zambiri kuchokera kosiyanasiyana kuti apange mitundu yatsatanetsatane ya 3D.

Makanema aposachedwa a Micro-CT amatha kuwona zing'onozing'ono zapakati pa 1.7 μm ndi 30 μm. Makinawa amapanga zithunzi za grayscale pomwe voids zimawoneka zakuda kuposa zitsulo zowazungulira. Kusanthula kwamakono kwamakampani a CT kumatenga masekondi 12 okha, kupangitsa kuti ikhale yabwino pakuwunika kopanga. Mainjiniya atha kugwiritsa ntchito pulogalamu yowunikira ya CT kuti apange malipoti atsatanetsatane okhudza kukula kwake, kukhazikika, ndi malo poyesa magawo.

 

Kuyesa kwa Dye Penetrant kwa Zolakwika Zapamwamba

Dye penetrant inspection (DPI) imapeza zolakwika zosweka m'zigawo za aluminiyamu zoponya kufa kudzera mu capillary. Kuyesa kosawononga kumeneku kumawononga ming'alu, porosity, ndi zovuta zapamtunda zomwe sizingadziwike. Njirayi imagwira ntchito m'magawo asanu ndi limodzi:

1. Yeretsani pamwamba kuchotsa mafuta, zinyalala ndi zowononga
2. Ikani utoto wolowera pang'onopang'ono pomiza, kupopera mbewu mankhwalawa kapena kupaka utoto
3. Lolani utotowo ulowetse zolakwika
4. Chotsani zowonjezera zowonjezera osasamba pamwamba
5. Ikani wopanga mapulogalamu kuti akoke olowera ku zolakwika
6. Yang'anani pansi pa kuyatsa koyenera

Zowonongeka zimawoneka ngati zofiira zowala - ming'alu imawoneka ngati mizere kapena madontho, pomwe porosity imawoneka ngati madontho kapena madera amitundu. DPI imapereka njira yotsika mtengo yopezera zolakwika zamtundu wa aluminiyamu chifukwa imafunikira zida zochepa ndipo imagwira ntchito m'ma lab komanso pamalo.

 

Kuyesedwa kwa Pressure kwa Chizindikiro cha Leakage

Zida zomwe zimayenera kukhala zolimba kwambiri zimafunikira mayeso apadera kuti awone kukhulupirika kwawo popanda kuwawononga. Kuyesa kupanikizika kumapeza porosity yachilendo kapena kutayikira kwakung'ono komwe kungayambitse mavuto panthawi yogwira ntchito. Magulu abwino amayesa magawo pazovuta zapakati pa 80-300 psi, okhala ndi miyezo yatsopano yogwiritsa ntchito zitsenderezo zapamwamba kuti zikhale zodalirika.

Mayesowa amathandiza opanga kupeza malo ofooka m'zigawo za aluminiyamu ya die cast asanasanduke ming'alu kapena kutayikira. Kuyesa koyambirira kopanga - musanapange makina kapena kusonkhanitsa - kumachepetsa mtengo wazovuta. Kuyesa kwathunthu kumatenga mphindi ziwiri zokha ndikupanga malipoti osindikizidwa nthawi kuti alembedwe.

 

Dimensional Verification Techniques

Zida zoponyera ma aluminiyamu zimafunikira macheke am'mbali kuti zitsimikizire kuti zikukwanira ndikugwira ntchito moyenera. Opanga amagwiritsa ntchito zida zosiyanasiyana, kuyambira ma micrometer oyambira ndi ma gage mpaka makina apamwamba a Coordinate Measuring Machines (CMM). Ukadaulo wa CMM umapereka kulondola kwa mawonekedwe ovuta pogwiritsa ntchito ma probe oyendetsedwa ndi makompyuta.

Zinthu zosiyanasiyana zimafunikira milingo yolondola. Zigawo zina zoponyera aluminium kufa ziyenera kukhala mkati mwa ± 0.05 mm m'lifupi ndi ± 0.2 mm kutalika. Magulu abwino amawunika miyeso yofunikira panthawi yopanga ndikuwunika komaliza, makamaka m'malo omwe makasitomala amalemba kuti ndi ofunikira. Deta yoyezera imathandiza opanga kukonza zovuta zomwe zingayambitse mawonekedwe osagwirizana, zomwe zimapangitsa kuti zikhale zabwinoko.

 

Zomwe Zimayambitsa Mavuto Abwino mu Die Casting Process

Kupanga bwino mu njira zopangira kufa kumadalira kuzindikira ndi kuwongolera zosintha zomwe zimakhudza mtundu wina. Kupambana kumabwera chifukwa chomvetsetsa zomwe zimayambitsa zolakwika m'malo mongokonza zovuta zowoneka.

 

Mavuto Oletsa Kutentha

Zosagwirizanakutenthachikuwoneka ngati vuto lalikulu kwambiri mu njira zopangira aluminiyamu. Kutentha komwe kumatsika pansi pamiyezo yoyenera kumabweretsa zovuta zazikulu monga kudzaza nkhungu, kusalondola bwino, komanso kulimba koyambirira kwa kusungunuka. Kutentha kwakukulu kumayambitsa zovuta zazikulu monga mapindikidwe, kumamatira kufa, ndi kufota kwa mabowo.

Kutentha kumafunika kukhala pafupifupi 40% ya kutentha kwa mpweya kuti mupeze zotsatira zabwino. Zosakaniza za aluminiyamu zoponyedwa pa 670-710 ° C zimagwira ntchito bwino ndi kutentha kwapakati pa 230-280 ° C. Kutentha kumeneku kumapangitsa kuti pakhale malo abwino opangira makina apamwamba kwambiri omwe ali ndi miyeso yofanana.

Kuwongolera kutentha kumapanga mawonekedwe osati gawo la geometry-imapanga mwachindunji microstructure yachitsulo. Kusamalira kutentha mosamala kumachepetsa porosity. Chitsulocho chimalimba pang'onopang'ono kuchokera ku zigawo zakutali kwambiri ndi zipata kupita ku machitidwe oyendetsa. Kutentha koyenera kumathandizira kufa kwanthawi yayitali ndikuyimitsa ming'alu yapakatikati kuchokera pakuwotcha kwam'deralo.

 

Chipata Cholakwika ndi Mapangidwe Othamanga

Dongosolo la mageti limachita zambiri kuposa chitsulo chosungunula - limawongolera kuthamanga kwa kuthamanga, kusamutsa kuthamanga, komanso kukhazikika kwamafuta. Mapangidwe oyipa a zipata ndi othamanga amapanga chipwirikiti panthawi yachitsulo. Izi nthawi zambiri zimatsekereza gasi ndikupangitsa kuwonongeka kwa porosity.

Kayeseleledwe ka makompyutatsopano zimathandizira kukhathamiritsa mapangidwe a zipata ndi othamanga. Zoyeserera zapamwamba zomaliza zimathandiza mainjiniya kukhazikitsa kukula kwa zipata zoyenera, malo, ndi kamangidwe ka makina othamanga asanapangidwe kwenikweni. Kusunthaku kuchokera ku njira zakale zoyesera ndi zolakwika kwakweza mitengo yamtundu woyamba popanga kwambiri popanga zida zakufa.

 

Kayendetsedwe Ka mpweya Wosakwanira

Kusatulutsa mpweya wabwino kumayambitsa zovuta zambiri zoponya. Popanda njira zabwino zothawira mpweya, kupanikizika kumawonjezeka m'mafawo. Izi zimayimitsa kudzaza kwathunthu ndikupanga zolakwika zokhudzana ndi gasi. Kukula kwa mpweya kuyenera kuthana ndi kuchuluka kwa mpweya womwe wachotsedwa panthawi ya jakisoni osafika pamikhalidwe ya sonic.

Mainjiniya aziyika zolowera m'malo omaliza kuti mudzaze komanso pomwe mizere yowotcherera ipangike. Ma geometries ovuta amafunikira mayankho apadera. Mpweya wopindika wokhala ndi ma pores ofananirako amalola mpweya wotsekeka kuti utuluke koma amaletsa zitsulo kuti zisadutse.

 

Die Lubricant Application Nkhani

Kuwongolera kwamafuta kumakhudza gawo limodzi mwa njira ziwiri: imagwira ntchito ngati chotulutsa ndikuwongolera kutentha. Mafuta ochulukirapo amawonjezera kulimba kwa gasi pamene zinthu zimawonongeka ndikutulutsa mpweya ukakhudza chitsulo chosungunuka. Mafuta ochepa kwambiri amayambitsa zovuta zowotchera pomwe aluminiyumu amamatira kumtunda.

Mafuta opangira mafuta amakhudzanso kuchuluka kwamafuta chifukwa cha kuziziritsa kwawo. Kafukufuku akuwonetsa kuti kuzizira kumasintha kwambiri ndi kutentha kwapamtunda. Kutentha kwabwino kwambiri kumachitika pansi pa kutentha kwa Leidenfrost-kumene filimu ya nthunzi yosalekeza imaphimba pamwamba pake. Kuziziritsa kumakhala kochepa kwambiri kuposa kutenthaku chifukwa mafuta opaka mafuta sangathe kudutsa chotchinga mpweya.

Kukhazikitsa Njira Zabwino Zowongolera Ubwino

Kasamalidwe kabwino ndiye gawo lalikulu la moyo wakuchita bwino pakupanga aluminiyamu yakufa. Zomera zopanga zimafunikira njira zowongolera mwatsatanetsatane zomwe zimazindikiritsa ndikukonza zovuta panthawi yonse yopangira kuti zitsimikizire kukhazikika kwagawo.

 

Statistical Process Control for Die Casting

Statistical Process Control (SPC) imagwiritsa ntchito njira zowerengera kuwunika ndikuwongolera njira zopangira. SPC imathandizira opanga oponya kufa kuwona ndikukonza zovuta mwachangu pogwiritsa ntchito zida zowonera ngati ma chart owongolera. Njira imeneyi imagwira zizindikiro zochenjeza zisanachitike zowonongeka.

Kukhazikitsa kwa SPC kumatsata zosintha zazikulu monga kuthamanga kwa jekeseni (100-150 MPa), kutentha kwasungunuka (680-720 ° C), ndi kuzizira (10-20 ° C / s). Opanga amatha kukhala ndi ulamuliro wokhazikika pamayendedwe oponyera posanthula magawowa. Kukhathamiritsa kumeneku kumachepetsa zinyalala, kumachepetsa ndalama, komanso kumapangitsa makasitomala kukhala osangalala.

 

Kukhazikitsa Malo Oyang'anira Ubwino Wofunika Kwambiri

Kuwongolera kwaubwino kuyenera kuchitika pagawo lililonse lopanga, kuyambira pakuwunika koyambira mpaka kutsimikizira komaliza. Mapulani abwino kwambiri amakhazikitsa macheke pamagawo ofunikira panthawi yonse yopanga.

Opanga amayamba ndikuyesa zinthu zomwe zikubwera mwamankhwala komanso pamakina. Ma aluminiyamu aloyi ali ndi 95% aluminiyamu ndi 5% silikoni, ndi mphamvu yolimba ya 250-300 MPa. Njirayi imapitilira ndi makina oyezera (CMM) omwe amafananiza magawo ndi mitundu itatu. Kuyang'anitsitsa bwino musanatumize kumatsimikizira kuti makasitomala salandira zinthu zolakwika.

 

Zofunikira Zolemba ndi Kutsata

Kutsatiridwa kwakhala kofunikira pazigawo zoponyera ma aluminiyamu, makamaka pazigawo zodalirika kwambiri. Dongosolo lathunthu lotsatiridwa limafunikira zinthu zitatu zofunika:

1. Chigawo chapadera cholemba ndi zizindikiritso zamunthu payekha
2. Kuwerenga ma code pamagawo apadera opanga
3. Kusamalira deta pogwiritsa ntchito machitidwe opangira zinthu

Malo ovuta omwe amachokera kumapangitsa izi kukhala zovuta, koma luso la laser marking limapereka chizindikiritso chodalirika chomwe chimapulumuka kutentha. Zolemba izi zimapanga "chikalata chobadwa" pagawo lililonse. Dongosololi limapereka mwayi wopeza ma alloy ndikusintha zidziwitso ngati zovuta zichitika ndikuwongolera gawo, kasamalidwe, ndi kasamalidwe.

 

Njira Zapamwamba Zopewera Zowonongeka Zotayira Aluminiyamu

 

Kuwongolera kwaubwino kokha sikungalepheretse kuwonongeka kwa njira zopangira aluminiyamu. Makampani amafunikira ukadaulo wapamwamba kwambiri kuti awonetsetse kuti zinthu zikuyenda bwino nthawi zonse.

 

Vacuum-Assisted Die Casting Technology

Kuponya mothandizidwa ndi vacuum kumachepetsa kwambiri zolakwika zokhudzana ndi gasi pazigawo za aluminiyamu. Tekinoloje iyi imapangitsa kuti pakhale kupanikizika koyipa mkati mwa kufa ndikuchotsa mpweya wotsekeka ndi mpweya womwe umayambitsa porosity. Standard vacuum-assisted die casting (VADC) imasunga ma vacuum ochepera pakati pa 60-300 mbar. High vacuum die casting (HVDC) imakwaniritsa ma vacuum abwinoko pansi pa 60 mbar. Tekinoloje iyi ili ndi maubwino angapo:

• Kutentha-kuchiritsa popanda matuza chifukwa cha kuchepa kwa gasi porosity
• Bwino makina katundu kudzera bwino kachulukidwe
• Kukhazikika bwino kwamapangidwe pamapulogalamu apamwamba kwambiri

Makampani amasunga ndalama pogwiritsa ntchito vacuum system pochepetsa ntchito yokonza pambuyo pokonza komanso zinyalala zochokera kuzinthu zolakwika.

 

Pulogalamu Yoyeserera Yokometsera Kuyenda Kwachitsulo

Mapulogalamu apakompyuta oyerekeza asintha njira zamapangidwe a aluminiyamu. Mainjiniya tsopano amatha kulosera zamavuto mwatsatanetsatane kupanga kusanayambe. Mapulogalamu amakono amatsanzira zitsulo zosungunula, mawonekedwe olimba, ndi kusintha kwa kutentha panthawi yonseyi.

Zida monga MAGMASOFT® zimayendetsa mapangidwe osiyanasiyana opangira kufa ndi kuphatikiza kwa magawo kuti mupeze njira zabwino kwambiri. Zoyezera izi zimatsata kupsinjika kotsalira, kulosera momwe ma microstructure akuyendera, ndikuwerengera makina. Zinthu zonsezi zimathandiza kupewa zolakwika ndikukulitsa moyo wagawo.

 

Madongosolo Odzitetezera Othandizira Zida Zoponyera Die

Kusamalira pafupipafupi kumawonjezera moyo wa zida ndikuchepetsa kuwonongeka kwazinthu. Ndondomeko yabwino yodzitetezera imayang'ana magawo asanu ndi atatu ofunikira: mawonekedwe a makina, makina opangira ma hydraulic, zida zamagetsi, makina omangira, makina ojambulira, mafuta odzola, makina oziziritsa, ndi zida zotentha kwambiri.

Mafuta a Hydraulic amafunikira chisamaliro chapadera chifukwa 70% ya kulephera kwa makina oponya kufa kumachokera kumavuto okhudzana ndi mafuta. Magulu amayenera kuyang'ana zolumikizira mapaipi amafuta, zomangira zomangira ma valve, ndi zolumikizira miyezi isanu ndi umodzi iliyonse. Izi zimalepheretsa kutayikira ndikuletsa mpweya kulowa mu hydraulic system.

 

Mapeto

Ubwino wowongolera bwinoimakhalabe yofunikira pakupanga bwino kwa aluminiyumu yakufa. Kumvetsetsa mwatsatanetsatane zolakwika zobisika kwapangitsa opanga kugwiritsa ntchito njira zowunikira komanso njira zodzitetezera zomwe zimasunga miyezo yapadera.

Chitsimikizo chaubwino chasinthika. Tsopano ikuphatikiza kuyesa kwachikhalidwe ndi mayankho apamwamba monga CT scanning, vacuum-assisted casting, ndi pulogalamu yoyeserera yamakompyuta. Zida izi zimathandiza opanga kuwona zolakwika zazing'ono msanga. Amatha kukhathamiritsa njira zoyendetsera zitsulo ndikuletsa zolakwika zomwe zitha kukhala zotsika mtengo.

Kuwongolera kwadongosolo lachiwerengero kumagwira ntchito ndi zowunikira zazikulu kuti zisungidwe mwamphamvu pazosintha zofunika kwambiri zopanga. Kuwongolera kwamphamvu kwabwino kumachokera ku zolembedwa zolondola komanso njira zotsatirira. Machitidwewa amapereka chidziwitso chofunikira kuti apititse patsogolo machitidwe mosalekeza.

Kupambana kwa aluminium kufa kumadalira pazifukwa zazikulu. Kuwongolera kutentha koyenera, mapangidwe a zipata zokongoletsedwa bwino, mpweya wokwanira, ndi kuthirira koyenera kumapangitsa kusiyana konse. Opanga omwe amapambana pazinthu izi ndikugwiritsa ntchito njira zowunikira zapamwamba amapanga zida zapamwamba zomwe zimakwaniritsa miyezo yolimba yamakampani nthawi zonse.