Shell molding casting inopa kunyatsojeka, kudzokororwa, uye kupera kwepamusoro kusingaenzaniswi neyakajairwa jecha kukanda-kunyanya kune yepakati-kuoma, yakakwirira-vhoriyamu zvikamu senge hydraulic valve miviri, pombi dzimba, uye winch shafts. Takagadzira pamusoro pe12,000 shell-yakaumbwa simbi uye simbi inokandwa mumakore matatu apfuura chete-akawanda ari pasi pe ± 0.15 mm dimensional tolerance uye Ra 3.2 µm as-cast surface. Izvi hazvisi dzidziso. Ndizvo zvinoitika kana iwe ukabatanidza phenolic resin chemistry, inodzorwa yepakati-bhokisi tembiricha, uye chaiyo-nguva goko ukobvu hwekutarisisa pauriri hwechitoro.
Danho 1: Kugadzirira Kwepatani - Kurongeka Kunotanga naTenzi
Tinoshandisa simbi dzakaomeswa kana mapeteni ealuminium—kwete huni kana kuti maalloys anonyungudika zvishoma—kuumba goko. Sei? Nekuti maitiro ehupenyu anodzora zvakananga mutengo pachikamu pamavhoriyamu pamusoro pe500 mayunitsi. Mapatani edu anosanganisira chaiwo maekiseni ekudhirowa (0.5 ° -1.5 °), vent grooves isina kutetepa kupfuura 0.8 mm, uye akabatanidzwa egedhi maficha anobvisa manyore kucheka mumhanyi. Imwe neimwe pateni inosangana neCMM verification inopesana nevatengi GD&T isati yatanga kushandiswa. Vamwe vatengi vanotitumira 3D-yakadhindwa prototypes kuti ishande bvunzo-asi isu hatimbokanda kubva kwavari. Thermal yekuwedzera kusawirirana pakati peakadhindwa resin nesimbi yakanyungudutswa inokonzera isingafungidzike warpage mugoko.
Nhanho yechipiri: Kuumbwa kweShell - Kupisa, Resin, uye Nguva Hazvitaurike
Iyo pateni inotaridzwa kusvika 220-250 ° C. Kunyanya kutonhora? Kusakwana resin kurapa. Kupisa zvakanyanya? Kuora nguva isati yakwana uye gasi kukanganisa. Tinoipfekedza nejecha rakanaka resilica (40-100 mesh) yakasanganiswa ne 2.5-5% thermosetting phenolic resin. Iyo yakavharwa pateni inotenderera mukati mebhokisi rekurasira kwemasekonzi gumi-20-inongorebesa kuti yunifomu 6-12 mm shell iumbe. Zvadaro inverted uye yakabikwa pa 380-420 ° C kwemaminitsi 2-4. Iyo yekupedzisira bake inosanganisa resin zvizere. Svetuka, uye goko rinoputsika panguva yekuunganidza mold. Isu tinotarisisa tembiricha yeovheni masekonzi makumi mapfumbamwe ega ega tichishandisa calibrated thermocouples-kwete kuverenga ambient.
Nhanho 3: Mold Assembly - Kurongeka kunoraira Dimensional Kugadzikana
Mahafu-mashells maviri anonamirwa nekupisa-activated phenolic adhesive kana mechanically pini. Hapana ivhu, hapana zvipikiri, hapana tepi. Kusarongeka kwe kunyange 0.3 mm kunoratidza kupenya panzvimbo inomanikidza-senge silinda yeimba flanges kana chigaro chevharuvhu. Kune asymmetrical zvikamu, tinoshandisa dowel pini ne ± 0.01 mm kushivirira kwenzvimbo. Usati wadira, mold imwe neimwe yakaunganidzwa inopfuura nepanzvimbo yekuona. Kana gaka riri pakati pehafu richipfuura 0.1 mm chero nguva, rakaraswa-kwete reworked. Reassembly inounza kukanganisa kukanganisa.
Nhanho 4: Kudira uye Kusimbisa - Kunodzorwa Kuyerera Kunodzivirira Kusagadzikana
- Kudurura tembiricha inobatwa mukati me ± 15°C yemhando yakakwana-semuenzaniso, 1,420–1,450°C yeASTM A126 Kirasi B grey iron.
- Simbi inopinda nepazasi gedhi kuti ideredze kupindirwa kweoxide
- Shakeout inoitika 15-25 maminetsi mushure mekudururwa-nguva yakatarwa pachikamu chechikamu, kwete nguva yewachi
- Hapana kutonhora kwekumanikidza. Kudzima nekukasira kunotsemuka magoko uye kunoparira kushushikana mudzimba dzakatetepa-madziro
Takambodira 48 yakafanana piston pombi silinda dzimba mukupisa kumwe chete. Vatanhatu vakaratidza micro-shrink muvhavha port recess. Root cause? Kudonha kwe7°C mutembiricha yeladle panguva yekudururwa gumi nemaviri ekupedzisira. Iye zvino isu tinotora tembiricha ye mold yega yega- uye tinoramba chero batch uko musiyano unopfuura ± 10 ° C.
Nhanho yechishanu: Post-Casting Kubata - Iko Kutendeseka Kwepamusoro Kwahwina kana Kurasika
Shell molding inopa pedyo-net chimiro-asi kwete net shape. Yakakosha yekuisa chisimbiso nzvimbo ichiri kuda CNC machining. Ndicho chikonzero isu tichibatanidza kukanda uye machining pasi pedenga rimwe. Masimbi edu anokandwa kubva kushakeout kuenda kunzvimbo dzakachinjika machining-hapana chengetedzo yepakati. Sei? Kunyura kwehunyoro munzvimbo dzine porous kunokonzera hydrogen pinholes panguva yekutevera kurapwa kwekupisa. Isu tinodzivirirawo kuputika kwepfuti pazvikamu zvakagadzirirwa AMS 5387-inoenderana application; angular media inokuvadza padhuze-pamusoro pezviyo chimiro chinodiwa kuti usaneta mukuramba mune cobalt-alloy pombi zvikamu.
Shell molding casting inopfuura apo kukanda jecha kunoshaya kuenderana uye kukanda mari kunokanganisa mabhajeti - kazhinji kune zvikamu zvinorema 0.5 kg kusvika 50 kg, mavhoriyamu epagore kubva ku1,000 kusvika 50,000 mayuniti, uye zvinhu zvinosanganisira ductile iron, kabhoni simbi, simbi isina tsvina, uye nickel-resist alloys. KuQINGDAO QIANGSENYUAN TECHNOLOGY CO., LTD., Tinobata kuumbwa kwegoko kwete senzira yakazvimirira asi senodi imwe mune yakasimbiswa yekukanda-machining-finishing loop. Chese chakaumbwa-chakaumbwa chikamu chatinotakura chinotakura zvinhu zvizere zvekuteedzera, zvimiro zvakasimbiswa neCMM, uye nhoroondo yekupisa yakanyorwa-kubva patani yekubheka kusvika kuzororo rekupedzisira rekushushikana. Ndiwo mavharuvhu ekumanikidza anopona 20,000 PSI kutenderera. Ndiwo magadzirirwo ewinch centre shaft rollers anochengetedza runout pasi pe 0.02 mm mushure memaawa 10,000. Precision haiwanikwe mune imwe nhanho. Yakavharirwa mukati-nhanho nhanho.
