Knowledge point ib:
Pwm kub: Cov pwm yuav tsum tau preheated rau ib tug tej yam kub thiab txias ua ntej ntau lawm, txwv tsis pub nws yuav txias thaum lub high-temperature hlau kua yog sau lub pwm, ua rau lub kub gradient ntawm lub puab thiab txheej txheej ntawm pwm kom nce, ua rau thermal. kev ntxhov siab, ua rau saum npoo ntawm pwm kom tawg lossis tawg. Thaum lub sij hawm tsim khoom, pwm kub tseem nce ntxiv. Thaum cov pwm kub kub dhau lawm, pwm nplaum yog nquag tshwm sim, thiab txav qhov chaw ua haujlwm tsis zoo, ua rau muaj kev puas tsuaj rau pwm nto. Lub tshuab ua kom txias txias yuav tsum tau teeb tsa kom cov pwm ua haujlwm kub nyob rau hauv ib qho chaw.
Knowledge point ob:
Alloy filling: Cov kua hlau yog ntim nrog kev kub siab thiab kev kub ceev, uas yuav ua rau muaj kev cuam tshuam loj heev thiab yaig ntawm cov pwm, yog li ua rau muaj kev ntxhov siab thiab thermal stress. Thaum lub sij hawm cuam tshuam cov txheej txheem, impurities thiab gases nyob rau hauv lub molten hlau kuj yuav tsim complex tshuaj los ntawm cov pwm, thiab accelerate qhov tshwm sim ntawm corrosion thiab tawg. Thaum cov hlau molten yog qhwv nrog roj, nws yuav nthuav ua ntej nyob rau hauv qhov chaw uas tsis muaj zog ntawm cov pwm kab noj hniav. Thaum cov roj siab nce ntxiv, sab hauv tawg tau tshwm sim, rub tawm cov hlau hais nyob rau saum npoo ntawm cov pwm kab noj hniav, ua rau kev puas tsuaj, thiab tawg vim cavitation.
Knowledge point peb:
Pwm qhib: Thaum lub sij hawm tus txheej txheem ntawm cov tub ntxhais rub thiab pwm qhib, thaum ib co Cheebtsam deformed, mechanical stress kuj yuav tshwm sim.
Knowledge point plaub:
Txheej txheem ntau lawm:
Nyob rau hauv cov txheej txheem ntawm txhuas alloy tuag-casting ib feem, vim lub tshav kub pauv ntawm cov pwm thiab cov hlau molten, lub sij hawm kub hloov tshwm sim nyob rau saum npoo ntawm cov pwm, ua rau lub sij hawm thermal expansion thiab contraction, uas ua rau lub sij hawm thermal stress.
Piv txwv li, thaum lub sij hawm pouring, qhov saum npoo ntawm cov pwm yog raug compressive kev nyuaj siab vim cua sov, thiab tom qab lub pwm qhib thiab lub casting yog ejected, lub nto ntawm pwm yog raug rau tensile kev nyuaj siab vim txias. Thaum qhov kev hloov pauv kev ntxhov siab no rov ua dua, qhov kev ntxhov siab hauv pwm yuav loj dua thiab loj dua. , thaum qhov kev ntxhov siab tshaj qhov kev sib tsoo ntawm cov khoom siv, cov kab nrib pleb yuav tshwm sim ntawm qhov chaw ntawm cov pwm.
Paub ntsiab lus tsib:
Blank casting: Qee cov pwm tsuas yog tsim ob peb puas daim ua ntej cov kab nrib pleb tshwm, thiab cov kab nrib pleb loj hlob sai. Los yog nws yuav yog tias tsuas yog cov txheej txheem sab nraud tau lees paub thaum lub sijhawm forging, thaum lub dendrites hauv cov hlau yog doped nrog carbides, shrinkage kab noj hniav, npuas thiab lwm yam xoob tsis xws luag uas yog stretched raws txoj kev ua streamlines. Qhov kev hloov pauv no tseem ceeb heev rau qhov kawg quenching yav tom ntej. Deformation, tawg, brittleness thaum siv, thiab tsis ua hauj lwm tendencies muaj kev cuam tshuam zoo.
Knowledge point six:
Cov kev ntxhov siab txiav tawm thaum tig, milling, npaj thiab lwm yam kev ua haujlwm tuaj yeem raug tshem tawm los ntawm qhov chaw annealing.
Paub ntsiab lus xya:
Kev sib tsoo kev ntxhov siab yog tsim los ntawm kev sib tsoo ntawm quenched steel, kev sib txhuam kub yog tsim thaum lub sij hawm sib tsoo, thiab txheej softening thiab decarburization txheej yog tsim, uas txo cov thermal shrinkage zog thiab yooj yim ua rau kub tawg. Rau cov kab nrib pleb thaum ntxov, tom qab kev sib tsoo zoo, HB steel tuaj yeem ua kom sov rau 510-570 ° C thiab tuav rau ib teev rau txhua 25 hli tuab rau kev ntxhov siab annealing.
Knowledge point yim:
EDM machining ua rau muaj kev ntxhov siab, thiab txheej txheej nws tus kheej ci nplua nuj nyob hauv cov khoom siv hluav taws xob thiab cov khoom siv hluav taws xob tau tsim nyob rau saum npoo ntawm cov pwm. Nws yog tawv thiab nkig. Cov txheej no nws tus kheej yuav muaj cov kab nrib pleb. Thaum EDM machining nrog kev ntxhov siab, lub siab zaus yuav tsum tau siv los ua cov txheej txheem ntawm tus kheej lub ci ci yog txo kom tsawg thiab yuav tsum tau muab tshem tawm los ntawm polishing thiab tempered. Lub tempering yog ua nyob rau hauv lub thib peb-theem tempering kub.
Knowledge point cuaj:
Kev ceev faj thaum ua pwm: kev kho cua sov tsis zoo yuav ua rau pwm tawg thiab khawb ntxov ntxov. Tshwj xeeb tshaj yog tias tsuas yog quenching thiab tempering yog siv yam tsis muaj quenching, thiab tom qab ntawd cov txheej txheem nitriding nto yog ua tiav, cov kab nrib pleb yuav tshwm sim tom qab ntau txhiab tuag castings. thiab tawg. Qhov kev ntxhov siab tsim tawm tsuas yog tom qab quenching yog qhov tshwm sim ntawm superposition ntawm thermal stress thaum lub sij hawm txias thiab cov txheej txheem strain thaum lub sij hawm hloov. Lub quenching kev ntxhov siab yog qhov ua rau deformation thiab tawg, thiab tempering yuav tsum tau ua kom tshem tawm kev ntxhov siab annealing.
Paub point kaum:
Pwm yog ib qho ntawm peb yam tseem ceeb hauv kev tsim khoom tuag-casting. Qhov zoo ntawm kev siv pwm ncaj qha cuam tshuam rau lub neej ntawm pwm, kev ua haujlwm ntawm cov pwm thiab cov khoom zoo, thiab muaj feem cuam tshuam rau tus nqi ntawm kev tuag-casting. Rau kev cob qhia tuag-casting, kev saib xyuas zoo thiab kev saib xyuas ntawm cov pwm yog qhov muaj zog lav rau kev ua tiav ntawm kev tsim khoom ib txwm muaj txiaj ntsig rau kev ruaj ntseg ntawm cov khoom zoo, txo qis cov nqi tsim khoom mus rau qhov loj, thiab yog li txhim kho kev tsim khoom.
Post lub sij hawm: Jun-28-2024
