Xa iinjineli zichaza intsimbi yotyalo-mali yokuphosa umzi-mveliso wokuvelisa Izisombululo, azithengi nje iinxalenye-zikhusela uzinzo phantsi kwebhayisekile eshushu, ukuhambelana kwe-microstructural kwiibhetshi zeeyunithi ezingama-500, kunye nokunyamezela i-porosity kwimizimba yevalvu yoxinzelelo oluphezulu. Siye sabona iiprojekthi ezininzi zilibazisekile ngababoneleli abaphatha utyalo-mali njengenkqubo enye-ingakumbi kunye ne-grey kunye ne-ductile cast irons, apho ulawulo olulinganayo lwekhabhoni, i-mold preheat ramp rates, kunye nokulawulwa kwendawo yombethe kwi-shell-building ngqo ilawula ubuchule kunye nobomi bokudinwa.
Kutheni i-Cast iron ifuna ngaphezulu kune-Foundry nje
Intsimbi yentsimbi "ayilula ukuyiphosa" ngenxa yokuba ihamba kakuhle. I-graphite morphology yayo-i-flakes kwi-iron engwevu, i-nodules kwi-ductile-iphendula ngokukhawuleza kwizinga lokupholisa, ixesha lokugonywa, kunye nokufuma kwe-ambient ngexesha lokuhlanganiswa kwepatheni ye-wax. Kwiziko lethu elithobela i-ISO eQingdao, siphatha iqashiso ngalinye njengovavanyo lwetsimbi: izatifikethi zezinto eziluhlaza eziqinisekisiweyo ngaphambi kokufakwa kwe-alloying, iziko liyanyibilika lilandelwa yi-spectrometry yexesha lokwenyani, kunye nokubumba iqokobhe elibhakwe kwi-1,100 ° C kunye nexesha lokuhlala lemizuzu engama-30-hayi ngenxa yokuba umgangatho usitsho njalo, kodwa ngenxa yokuba sincipha ukuncitshiswa kwe-micro2% ngaphezulu kwe-2% 1,050°C for >25 imizuzu.
Sihambise phezu kwe-470 yezindlu zevalve yoxinzelelo kwiinkqubo ze-hydraulic ezisebenza kwi-bar ye-420-akukho namnye ongaphumelelanga kwinkonzo. Ngoba? Ngenxa yokuba asiyeki kwi-ASTM A536 okanye i-GB/T 1348. Siqinisekisa ukunyanzeliswa kwe-nodularity ngokuhlalutya umfanekiso kwi-casting nganye yesithathu, sebenzisa imivalo yokuqina ukusuka kwigalo elifanayo njengenxalenye yemveliso, kunye ne-map hardness gradients kwiindonga zezindlu ze-cylinder usebenzisa i-12-point Rockwell C scans. Yiloo ndlela obamba ngayo indawo epholileyo epholileyo ejika udonga lwe-30-mm ibe yi-interface brittle.
Apho uTyalo-mali olulahlwayo lubetha isanti-kwaye xa lungekho
Utyalo-mali lunikezela nge-±0.05 mm unyamezelo olungqameneyo kunye neRa 1.6 µm njengokuphoswa komphezulu ogqityiweyo-ibalulekile kwizindlu zepiston pump cylinder apho ijiyometri yophawu lokutywina imisela amazinga okuvuza. Kodwa sixelela abathengi ngaphambili: ukuba inxalenye yakho inobunzima obungaphezulu kwe-45 kg okanye ineepaseji zangaphakathi ezibanzi kune-8 mm, ukuchithwa kwesanti kuhlala kunika uzinzo olungcono kunye neendleko eziphantsi ngekhilogram nganye. Siye sahamba sisuka kwiingcaphuno apho isanti iza kuhambisa ukuqina kodonga olungqingqwa-kuba ukunyaniseka kuthintela ukusilela kwintsimi.
Umsebenzi wethu oxutyiweyo uvala umsantsa. Umzekelo: iirola ze-winch center shaft ziqala njenge-investment-cast ductile iron (ASTM A), emva koko zingene kwi-CNC ngokuvula i-5-axis lathes ukuya kwiijenali ezithwele ngokwenene ngaphakathi kwe-0.015 mm TIR. Unyango olushushu lulandela-ukucima kwi-890 ° C, ukutshisa kwi-620 ° C-emva koko ukudubula ukuchama ukubangela + i-280 MPa yoxinzelelo loxinzelelo. Isiphumo? Ubomi be-Shaft bandiswa nge-3.7 × kwizicelo zezithuthi zobunjineli ezikude nonxweme apho i-grit enetyuwa ikhawuleza i-pitting.
Ezine ezingaxoxiswanayo kwiMveliso yentsimbi yokuCasa eSebenza ngokuPhezulu
Nayiphi na intsimbi yotyalo-mali yokuphosa umzi-mveliso wokuvelisa ibango lokuthembeka kufuneka libonise olu lawulo lune:
- Ukulandeleka kwezinto phantsi ukuya kwinani lobushushu-kungekhona nje ii-certs ze-mill, kodwa i-spectral retest iingxelo ze-Si, Mn, P, S, kunye ne-Cu/Ni/Cr eshiyekileyo kwibhetshi nganye;
- Ukuqinisekiswa kwengqibelelo yeqokobhe-Sisebenzisa uvavanyo lokuvuza kwe-helium kwi-castings ebalulekileyo, kungekhona nje ukuhlolwa okubonakalayo;
- Kwinkqubo yokugcinwa kwesango-I-CMM ihlola emva kokuchithwa kwe-waxing, emva kokudubula, kunye ne-post-shot-blast-ngaphambi kokuba i-machining iqale;
- Ukuqinisekiswa okusebenzayo kwizixhobo zovavanyo-izidumbu ze-valve zivavanywa kwi-1.5 × uxinzelelo olulinganisiweyo; pump housings spin-balanced ukuya kwibakala G2.5.
Siyakugatya i-8.3% yenqaku lokuqala-hayi ngenxa yeziphene zokuthambisa, kodwa ngenxa yokuba i-GD&T callouts kwi-flange mounting surfaces idlule i-0.03 mm yokunyamezela ukuvuleka. Olo qeqesho luqhubela phambili ukuya kumthamo ophakathi: inkqubo yethu yokucwangcisa ebhityileyo yabela ixesha le-buffer kuhlengahlengiso lomjikelo weqokobhe owomileyo xa ukufuma kwemonsoon kunyuka ngaphezulu kwe-75% RH. Kuba ukuphosa akukho malunga nemozulu egqibeleleyo-imalunga nokulawula iinguqu onokuthi uzilinganise.
Oko Kufunwa Ngoononjineli—Asikuko Oko Iincwadana Ezinemifanekiso Zithembisayo
Udinga ukucaciswa kurhwebo lwexesha lokukhokela: utyalo-mali longeza iiveki ezi-2-3 zezixhobo kunye nokwakhiwa kweqokobhe, kodwa kuphelisa umatshini wesibini kwi-68% yeempawu kuyilo lwesiseko sempompo yethu eqhelekileyo. Udinga ukucaca ngokuhambelana kwe-cobalt-alloy-sihlala siphosa i-AMS 5387 ecaleni kwentsimbi ye-ductile kwiinkqubo zokungena ekwabelwana ngazo, kodwa emva kokuqinisekisa ukungafani kolwandiso lwe-thermal ngendlela yokulinganisa i-finite-element ye-frontification front. Udinga umntu oza kuhlaba umkhosi kwi-GD&T kungquzulwano kwangethuba: sibambe i-0.02 mm yokunyamezela indawo kumngxunya wedowel we-12-mm ofune ukufuduswa kweskimu sedatum sisonke-ukugcina i-24k yeedola kwii-castings ezilahliweyo.
QINGDAO QIANGSENYUAN TECHNOLOGY CO., LTD. ayithengisi iicastings. Sisombulula iindlela zokungaphumeleli ezisebenzayo-iindlela ezivuzayo, ukugqwethwa kwe-thermal, ukunxitywa kwe-abrasive-ngokulungelelanisa i-metallurgy, inkqubo ye-physics, kunye nenjongo yoyilo lomatshini. Amandla ethu alele ekwenzeni izinto ezimbalwa, kodwa ukuzenza ngokuphindaphindwa okubhaliweyo: ukusuka kwimilomo ye-cobalt ye-T800 ephethe i-650 ° C ye-slag etyhidiweyo ukuya kwiziseko zempompo zentsimbi ezisindileyo kwiminyaka eli-15 yokuthunyelwa ngaphandle konxweme ngaphandle kokuthotywa komgangatho.
Ukuba iprojekthi yakho elandelayo ifuna intsimbi yotyalo-mali yokuphosa umzi-mveliso wokuvelisa isakhono esimiliselwe kumlinganiselo-hayi ukuthengisa-qala ngokuphonononga umzobo. Siza kukuxelela into eyenziwayo, yintoni efuna ukuyilwa ngokutsha, kunye nalapho umngcipheko uhlala khona. Hayi ngamagama angacacanga. Kwiimicrons, megapascals, kunye namanani obushushu bezinto eziphathekayo.
