Optimization thiab txhim kho cov hlau casting plhaub pwm casting txheej txheem

Plhaub castingyog siv cov xuab zeb coated raws li raw khoom, pwm yog rhuab mus rau ib tug tej yam kub, los ntawm cov xuab zeb tua, rwb thaiv tsev los ua coated xuab zeb solidification, molding, tsim ib tug tej thickness ntawm lub plhaub, lub sab sauv thiab sab plhaub bonded ua ke nrog binder, ua kom tiav kab noj hniav rau casting molding castings. Plhaub casting muaj cov yam ntxwv ntawm kev nqis peev tsawg hauv cov khoom siv, kev ua haujlwm siab ntau lawm, lub voj voog luv luv, cov nqi tsim khoom tsawg, cov plua plav tsawg hauv qhov chaw tsim khoom, tsis tshua muaj suab nrov, tsis muaj kuab paug rau ib puag ncig, siab nto tiav ntawm castings, ruaj khov loj thiab cov txheej txheem kev ua tau zoo, thiab tau siv dav hauv tsheb, maus taus, siv tshuab thiab lwm yam lag luam.

1 Tom qab

Txij li thaum cov txheej txheem ntawm lub plhaub casting txheej txheem, qhov ruaj khov thiab ua tau zoo ntawm lub plhaub cam khwb cia hlau tau tiav. Txawm li cas los xij, cov txiv kab ntxwv tev thiab cov xuab zeb nplaum rau ntawm qhov chaw ntawm castings pom tias yog qhov tshwj xeeb hauv kev tsim khoomhlau castings, thiab qhov zoo ntawm qhov chaw tsis zoo. Qhov kev faib ua feem ntawm cov txiv kab ntxwv tev thiab cov xuab zeb nplaum hauv cov khoom tsis raug yog siab li 50%, uas ua rau txo qis kev ua haujlwm zoo thiab cov khoom zoo ntawm castings.

1.1 Kev qhia luv luv ntawm cov txheej txheem tsim khoom qub

Kev tsim khoom ntawm ib feem ntawm cov khoom cam khwb cia hlau, siv coated xuab zeb plhaub txheej txheem casting, ib hom ntawm ob daim, ob txheej ntawm stacked thawv, siv ob chav nres tsheb rov qab xuab zeb shooting mechanism plhaub.

1.2 Qhov loj thiab qhov chaw ntawm qhov tsis xws luag

Qhov chaw thiab tus naj npawb ntawm qhov tsis xws luag tau txheeb xyuas, thiab cov txiv kab ntxwv tev thiab cov xuab zeb sticking tsis xws luag yog tshwj xeeb tshaj yog pom tseeb nyob rau hauv lub rooj vag sab hauv thiab sab sauv ntawm lub casting.

2 defect thiab ua rau kev tsom xam

2.1 Defect formation mechanism

Txiv kab ntxwv tev yog hais txog cov flake lossis qog tsim ntawm qhov chaw casting thaum hlau thiab molding xuab zeb sib xyaw rau ntawm qhov chaw casting. Nyob rau hauv casting, plhaub nto vim tsis tu ncua scouring ntawm kub kub hlau kua, uas ua rau lub plhaub nto hauv zos vau, vau xuab zeb thiab molten hlau ua ke rau hauv cov kab noj hniav nyob rau hauv lub casting nto tsim protruding caws pliav, uas yog tsim ntawm txiv kab ntxwv tev, caws pliav thiab lwm yam tsis xws luag. , cam khwb cia hlau cov khoom tsis tshua muaj nyob rau hauv cov khoom cam khwb cia hlau. Sand sticking yog qhov tsis xws luag ntawm qhov chaw ntawm qhov casting. Nws yog ib qho nyuaj rau tshem tawm cov gritty burr los yog compound tsim los ntawm molding xuab zeb thiab hlau oxide adhered rau saum npoo ntawm lub casting, uas ua rau ntxhib casting nto, uas feem ntau tsub kom lub workload ntawm casting tu, txo lub finishing efficiency thiab muaj feem xyuam rau cov tsos ntawm lub casting. khoom.

2.2 Kev soj ntsuam ua rau

Ua ke nrog kev tsim cov txheej txheem ntawm nplaum xuab zeb thiab txiv kab ntxwv tev, nws tuaj yeem txiav txim siab tias qhov tsim ntawm cov xuab zeb nplaum thiab txiv kab ntxwv tev ntawm lub plhaub cam khwb cia hlau yog raws li hauv qab no:

(1) Thaum lub sij hawm pouring txheej txheem, qhov kub ntawm molten hlau yog siab, thiab lub plhaub casting nyob ze ntawm lub rooj vag yog rhuab mus ntev. Vim hais tias cov xuab zeb coated yog ib qho yooj yim rau vau thiab rhuab rau ib lub sij hawm ntev, cov xuab zeb plhaub ntawm qhov no yog overheated, thiab lub cev qhuav dej ntawm cov xuab zeb ntawm cov kab noj hniav ua rau cov phenomenon ntawm sticking xuab zeb thiab txiv kab ntxwv tev rau ntawm qhov chaw. ntawm qhov casting;

(2) Cov txheej txheem kho ntawm cov xuab zeb plhaub yog nyias thiab lub zog ntawm cov xuab zeb plhaub yog tsawg. Thaum lub qhov kub thiab txias siab los yog lub sij hawm ntws tawm ntawm cov hlau molten ntev thiab lub zog ntws tawm yog loj, qhov saum npoo ntawm cov xuab zeb yog yooj yim tawg thiab tawg, ua rau "infiltration" ntawm cov hlau molten rau hauv cov xuab zeb. plhaub, los yog cov xuab zeb tawg thiab cov hlau molten solidify ua ke los tsim qhov tsis xws luag ntawm cov xuab zeb nplaum;

(3) Lub refractoriness ntawm cov xuab zeb coated yog tsawg. Thaum cov hlau molten nkag mus rau hauv cov kab noj hniav, qhov chaw ntawm cov kab noj hniav ntawm cov xuab zeb plhaub tau pib tawg ua ntej lub zog ntawm cov hlau molten, ua rau "infiltration" ntawm cov hlau molten mus rau sab hauv ntawm lub plhaub xuab zeb, lossis cov xuab zeb tawg. particles solidify nrog cov hlau molten los ua cov xuab zeb nplaum;

(4) Qhov cuam tshuam quab yuam ntawm lub sprue yog loj, thiab lub sprue ib feem ntawm lub sij hawm scouring yog ntev tshaj plaws, lub sprue yog ncaj qha mus txuas nrog lub puab rooj vag, thaum lub kub kub molten hlau rushed mus rau hauv lub sprue ncaj qha mus rau hauv cov kab noj hniav, vim mus rau turbulent ntws ntawm molten hlau, ua rau lub hauv paus ntawm lub rooj vag xuab zeb plhaub ntov, ntab xuab zeb nrog kua hlau rau hauv kab noj hniav.

3. Txheej txheem optimization xeem thiab tsom xam

3.1 Txo qhov kub thiab txias

Cov xuab zeb coated siv rau casting steel yog quartz refractory khoom. Lub casting kub yog siab dhau los yog lub zos overheating, uas yog ib qho yooj yim rau lub cev qhuav dej, tawg, xuab zeb flushing thiab lwm yam phenomena, uas ua rau cov xuab zeb sticking, txiv kab ntxwv tev thiab lwm yam tsis xws luag casting. Hauv cov txheej txheem ntawm lub plhaub pwm tsim, txhawm rau txo cov nqi tsim khoom, lub plhaub pwm casting txheej txheem feem ntau tsis siv cov txheej txheem refractory, ncaj qha tom qab casting. Qhov chaw nyob ze ntawm lub qhov rooj sab hauv ntawm lub casting yog siv los ua cov dej nkag. Lub molten steel kub yog siab, thiab ib feem ntawm cov xuab zeb plhaub overheats rau lub sij hawm ntev. Qhov saum npoo ntawm lub plhaub xuab zeb tawg, thiab kub kub molten hlau txuas ntxiv mus ua nplawm, ua rau cov xuab zeb nplaum thiab txiv kab ntxwv tev. Ntawm qhov chaw tsis cuam tshuam rau cov khoom lag luam zoo, qhov ntsuas kub yuav tsum raug txo kom tsim nyog, thiab lub plhaub hom casting yog txias plhaub casting. Qhov kub ntawm casting yuav tsum tsis txhob qis dhau los tiv thaiv kev sib cais txias. Yog li ntawd, txo qhov ntsuas kub tuaj yeem txhim kho qhov zoo ntawm qhov chaw, tab sis tsis tuaj yeem daws cov teeb meem ntawm cov txiv kab ntxwv tev thiab cov xuab zeb nplaum ntawm qhov chaw.

3.2 Txhim kho lub solidified txheej thickness ntawm xuab zeb plhaub

Lub curing txheej ntawm xuab zeb plhaub yog nyias thiab lub zog ntawm cov xuab zeb plhaub yog tsawg. Thaum lub qhov kub thiab txias siab los yog lub sij hawm ntws tawm ntawm cov hlau molten ntev thiab lub zog ntws tawm yog qhov loj, qhov saum npoo ntawm cov xuab zeb tau yooj yim tawg thiab tawg, ua rau "infiltration" ntawm cov hlau molten mus rau sab hauv ntawm cov xuab zeb plhaub, los yog cov xuab zeb tawg ua ke nrog cov hlau molten los ua cov xuab zeb nplaum thiab cov txiv kab ntxwv tev. Lub plhaub txheej yog nyias dhau, lub zog ntawm cov xuab zeb plhaub yog txo, thiab muaj kev pheej hmoo ntawm overheat breaking thiab xuab zeb ntxuav hauv cov txheej txheem pouring. Vim tias qhov no tau cuam tshuam ncaj qha los ntawm cov hlau molten, lub zog ntawm cov xuab zeb plhaub ntawm no yog ncaj qha cuam tshuam rau qhov zoo ntawm qhov casting. Nyob rau hauv cov txheej txheem tas mus li, cov pwm yog txias sai, uas ua rau muaj qhov tshwm sim ntawm cov xuab zeb tiam thiab tsis paub qab hau xuab zeb plhaub. Yog hais tias hauv qab ntawm lub sprue yog tuab heev, lub sij hawm crust yuav ua rau overburning ntawm lwm qhov chaw ntawm lub plhaub xuab zeb, thiab lub zog ntawm cov xuab zeb plhaub yuav raug txo. Tom qab kev ua kom zoo, cov xuab zeb plhaub yuav ua tiav tiav hauv kev tsim khoom tas mus li yam tsis muaj xuab zeb tiam thiab tawv nqaij thiab pob txha.

3.3 Txhim kho cov refractoriness ntawm coated xuab zeb

Cov xuab zeb coated muaj tsawg refractoriness. Thaum molten hlau nkag mus rau hauv cov kab noj hniav, qhov chaw ntawm cov kab noj hniav ntawm cov xuab zeb plhaub tau pib tawg ua ntej cov hlau molten solidification, ua rau "infiltration" ntawm cov hlau molten mus rau sab hauv ntawm lub plhaub xuab zeb, los yog cov xuab zeb tawg ua kom muaj zog. nrog molten hlau los ua cov xuab zeb nplaum. Tom qab kho qhov sib xyaw ntawm cov xuab zeb coated, cov ntawv pov thawj me me tau pom tias cov txiv kab ntxwv tev tshwm sim ntawm qhov chaw pov tseg tau raug tshem tawm, tab sis qhov tshwm sim ntawm cov nplaum nplaum tseem muaj nyob, thiab qhov tsis xws ntawm cov nplaum nplaum ntawm cov khoom nto tsis tuaj yeem daws tau tag nrho.

3.4 Optimize lub rooj vag system tsim

Pouring system muaj kev cuam tshuam zoo rau kev tau txais cov khoom zoo. Nyob rau hauv cov txheej txheem ntawm pwm filling, cov xuab zeb plhaub ze ntawm lub rooj vag tawg ua ntej, ua rau cov hlau molten "infiltrating" mus rau sab hauv ntawm cov xuab zeb plhaub los yog cov xuab zeb tawg ua kom muaj zog nrog cov hlau molten, yog li tsim cov tsis xws li nplaum xuab zeb thiab txiv kab ntxwv tev. nyob ze ntawm lub rooj vag thiab hauv dav hlau loj. Txo qhov cuam tshuam quab yuam ntawm cov hlau molten nyob rau saum npoo ntawm cov xuab zeb plhaub thiab ua kom lub peev xwm buffering ntawm cov txheej txheem tseem tuaj yeem txhim kho qhov tshwm sim ntawm cov xuab zeb nplaum thiab txiv kab ntxwv tev ntawm cov khoom. Lub nruam nruam casting system yog txiav txim siab los hloov qhov qub casting system, uas ua rau cov hlau molten nkag mus rau hauv cov kab noj hniav ruaj khov thiab txo cov scouring lub zog ntawm lub plhaub pwm. Cov duab ntawm lub spat yuav siv lub tiaj tus trapezoid, uas tuaj yeem txo qhov turbulent flow phenomenon ntawm kua hlau scour lub plhaub xuab zeb. Qhov ntev ntawm cov sprue yuav tsum yog luv li sai tau kom txo tau qhov tsis xws luag xws li kev sib cais txias thiab cov kab khiav vim qhov txias ntawm cov hlau molten.

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Post lub sij hawm: Oct-14-2021