Shell molding casting e fana ka ho nepahala, ho pheta-pheta, le pheletso ea bokaholimo e sa bapisoang le ho chesoa ha lehlabathe ho tloaelehileng - haholo-holo bakeng sa ho rarahana ha mahareng, likarolo tse phahameng joalo ka 'mele oa li-valve tsa hydraulic, matlo a pompo le li-winch shafts. Re hlahisitse tse fetang 12,000 tse entsoeng ka tšepe le litšepe lilemong tse tharo tse fetileng feela - boholo bo ka tlase ho ± 0.15 mm dimensional tolerance le Ra 3.2 µm as-cast surface. Sena ha se khopolo-taba. Ke se etsahalang ha o kopanya khemistri ea phenolic resin, mocheso o laoloang oa core-box, le tlhahlobo ea nako ea sebele ea likhetla mokatong oa lebenkele.
Mohato oa 1: Tokiso ea Paterone - Ho Nepahalla ho Qala ka Monghali
Re sebelisa litšepe tse thata kapa lipaterone tsa aluminium—ha ho mohla e leng lehong kapa li-alloys tse qhibilihang ka tlaase—bakeng sa ho etsa likhetla. Hobaneng? Hobane bophelo ba mohlala bo laola ka kotloloho litšenyehelo ka karolo e 'ngoe le e 'ngoe ka bongata bo kaholimo ho li-unit tse 500. Lipaterone tsa rona li kenyelletsa li-angles tse nepahetseng hantle (0.5 ° -1.5 °), li-grooves tse sa tšesaane ho feta 0.8 mm, le likarolo tse kopaneng tsa menyako tse felisang ho itšeha ha semathi ka letsoho. Paterone e 'ngoe le e' ngoe e netefatsoa ke CMM khahlano le GD&T ea bareki pele e sebelisoa. Basebelisi ba bang ba re romella li-prototypes tse hatisitsoeng tsa 3D bakeng sa tlhahlobo ea ts'ebetso - empa ha ho mohla re lahlang ho tsoa ho tsona. Ho se lumellane hoa katoloso ea mocheso pakeng tsa resin e hatisitsoeng le tšepe e qhibilihisitsoeng e baka warpage e sa lebelloang ka har'a khetla.
Mohato oa 2: Sebopeho sa Shell - Mocheso, Resin, le Nako ha li Buisanoe
Paterone e besitsoe pele ho 220-250 ° C. Ho bata haholo? Pheko e sa phethahalang ea resin. Ho chesa haholo? Ho bola pele ho nako le bofokoli ba khase. Re e roala ka lehlabathe le letle la silica (40-100 mesh) le kopantsoeng le 2.5-5% thermosetting phenolic resin. Paterone e koahetsoeng e potoloha ka har'a lebokose la ho lahlela ka metsotsoana e 10-20 - e telele e lekaneng hore khetla ea junifomo ea 6-12 mm e ka thehoa. Ka mor'a moo, e kenngoa 'me e chesoe ka 380-420 ° C ka metsotso e 2-4. Bake eo ea ho qetela e kopanya resin ka botlalo. E tlole, 'me khetla e senyeha nakong ea ho kopanya hlobo. Re beha leihlo mocheso oa onto ka metsotsoana e meng le e meng e 90 re sebelisa li-thermocouples tse lekantsoeng—eseng lipalo tse teng.
Mohato oa 3: Kopano ea Mold - Ho tsamaisana ho Laetsa botsitso ba Dimensional
Likhetla tse peli tse halofo li khomaretsoe ka sekhomaretsi sa phenolic se kentsoeng mocheso kapa se kenngoa ka mochine. Ha ho letsopa, ha ho lipekere, ha ho teipi. Ho se tsamaisane hantle ha esita le 0.3 mm ho bonahala e le khanya holim'a libaka tse nang le khatello-joaloka li-cylinder house flanges kapa litulo tsa li-valve. Bakeng sa likarolo tsa asymmetrical, re sebelisa lithakhisa tsa dowel tse nang le mamello ea ± 0.01 mm. Pele o tšela, hlobo e 'ngoe le e' ngoe e kopantsoeng e feta seteisheneng sa optical alignment. Haeba lekhalo pakeng tsa li-halves le feta 0.1 mm ka nako leha e le efe, le hlakotsoe-ha le sa tsosolosoa. Reassembly e hlahisa phoso e akaretsang.
Mohato oa 4: Ho Tšela le ho Tiisa - Phallo e Laolehileng e Thibela Moferefere
- Thempereichara ea ho tšela e ts'oaroa ka har'a ± 15 ° C ea mofuta o nepahetseng - mohlala, 1,420-1,450 ° C bakeng sa ASTM A126 Class B ea tšepe e putsoa.
- Metal e kena ka heke e ka tlase ho fokotsa oxide e kenang
- Shakeout e etsahala ka mor'a metsotso e 15-25 ka mor'a ho tšeloa - nako e behiloeng ka karolo ea botenya, eseng nako ea oache
- Ha ho pholiso e qobelloang. Ho tima ka potlako ho senya likhetla 'me ho baka khatello e setseng matlong a marako a masesaane
Ka lekhetlo le leng re ile ra tšela matlo a 48 a tšoanang a pompo ea piston mochesong o le mong. Tse tšeletseng li bonts'itse li-micro-shrink sebakeng sa phomolo sa li-valve. Sesosa sa ho qala? Ho theoha ha mocheso oa ladle ka 7°C nakong ea ho tšeloa ha 12 ho qetela. Hona joale re kenya mocheso oa mocheso bakeng sa hlobo e 'ngoe le e' ngoe-'me re hana beche leha e le efe moo phapang e fetang ±10°C.
Mohato oa 5: Ho Ts'oara ka Morao-Moo Botšepehi ba Bokahohle bo Hpuoang Kapa bo Lahlehang
Ho bopa ha khetla ho fana ka sebopeho se haufi-ufi-empa eseng letlooa. Libaka tse thata tsa ho tiisa li ntse li hloka mochini oa CNC. Ke ka lebaka leo re kopanyang ho lahla le ho sebetsa ka tlas'a marulelo a le mong. Lisebelisoa tsa rona tsa tšepe li tloha ho shakeout ho ea litsing tsa machining tse tšekaletseng - ha ho polokelo ea mahareng. Hobaneng? Ho kenngoa ha mongobo libakeng tse nang le masoba ho baka masoba a hydrogen nakong ea kalafo e latelang ea mocheso. Re boetse re qoba ho phatloha ha lithunya likarolong tse reretsoeng ho sebelisana le AMS 5387; mecha ea phatlalatso ea angular e senya sebopeho sa lijo-thollo se haufi-ufi se hlokahalang bakeng sa ho hanyetsa mokhathala likarolong tsa pompo ea cobalt-alloy.
Ho etsa likhetla ho ipabola moo ho lahla lehlabathe ho se nang botsitso le lichelete tsa lichelete - hangata bakeng sa likarolo tse boima ba 0.5 kg ho isa ho 50 kg, li-volumes tsa selemo le selemo ho tloha ho li-unit tse 1,000 ho isa ho tse 50,000, le lisebelisoa tse kenyelletsang tšepe ea ductile, tšepe ea carbon, litšepe tse sa hloekang le li-nickel-resist alloys. Ho QINGDAO QIANGSENYUAN TECHNOLOGY CO., LTD., ha re nke ho bopa likhetla e le mokhoa o ikemetseng empa e le node e le 'ngoe e tiisitsoeng ea "casting-machining-finishing loop". Karolo e 'ngoe le e' ngoe e entsoeng ka khetla eo re e romellang e na le traceability e feletseng ea thepa, litekanyo tse tiisitsoeng tsa CMM, le histori e ngotsoeng ea mocheso-ho tloha ho bake ea mohlala ho ea ho phomolo ea ho qetela ea khatello ea kelello. Ke kamoo li-valve tsa khatello li pholohang ka 20,000 PSI cycles. Ke kamoo li-winch center shaft rollers li bolokang ho phalla ka tlase ho 0.02 mm ka mor'a lihora tse 10,000. Ho nepahala ha ho finyelloe ka mohato o le mong. E notletsoe - mohato ka mohato.
