Txhawm rau tiv thaiv castings los ntawm deformation, tawg thiab lwm yam tsis xws luag vim txias txias tom qab pouring, thiab xyuas kom meej tias castings muaj txaus lub zog thiab toughness thaum lub sij hawm xuab zeb tu, castings yuav tsum muaj txaus lub sij hawm txias nyob rau hauv pwm. Kev tsim cov castings tsis tu ncua yuav tsum tau tsim kom muaj qhov txias txaus kom ntev kom ntseeg tau lub sijhawm txias ntawm cov castings.
Lub sij hawm txias hauv pwm ntawm castings muaj feem xyuam rau ntau yam xws li qhov hnyav, phab ntsa thickness, complexity, alloy hom, pwm zog, ntau lawm tej yam kev mob thiab lwm yam ntawm castings.
1 、 Lub sijhawm txias ntawm cov hlau nrum hauv cov xuab zeb pwm
Lub sij hawm txias ntawm cam khwb cia hlau qhov chaw nyob rau hauv cov xuab zeb pwm yog txiav txim raws li qhov kub thiab txias thaum unpacking. Koj tuaj yeem xa mus rau cov ntaub ntawv hauv qab no: 300-500 ° C rau cov khoom siv dav dav; 200-300 ° C rau castings nquag mus rau txias cracking thiab deformation; 200-300 ° C rau castings nquag kub tawg Casting kub yog 800-900 ℃. Tam sim ntawd tom qab unpacking, tshem tawm lub pouring riser thiab ntxuav cov xuab zeb core, ces muab tso rau hauv ib tug kub xuab zeb pit los yog nkag mus rau hauv lub cub tawg kom txias maj mam.
1, Lub sij hawm txias ntawm cov hlau nrum hauv cov xuab zeb pwm tuaj yeem xaiv los ntawm kev xa mus rau Table 11-2-1 thiab Table 11-2-3.
Table 11-2-1 Txias lub sij hawm ntawm nruab nrab thiab me me castings nyob rau hauv cov xuab zeb pwm
| Casting hnyav / kg | <5 | 5 ~ 10 | 10-30 Nws | 30 ~ 50 | 50 ~ 100 | 100-250 | 250-500 | 500-1000 |
| Casting phab ntsa thickness / hli | <8 | <12 | <18 | <25 | <30 | <40 | <50 | <60 |
| Lub sijhawm txias / min | 20-30 Nws | 25-40 Nws | 30 ~ 60 | 50 ~ 100 | 80-160 : kuv | 120-300 Nws | 240-600 Nws | 480-720 : kuv |
Lus Cim: Rau castings nrog cov phab ntsa nyias, lub teeb yuag thiab cov qauv yooj yim, lub sijhawm txias yuav tsum tau muab coj los ua tus nqi me me, txwv tsis pub, lub sijhawm txias yuav tsum tau coj los ua tus nqi loj.
Table 11-2-2 Txias lub sij hawm ntawm loj castings hauv xuab zeb pwm
| Casting hnyav / t | 1 ~ 5 | 5 ~ 10 | 10 ~ 15 | 15 ~ 20 | 20-30 Nws | 30 ~ 50 | 50 ~ 70 | 70-100 Nws |
| Lub sijhawm txias / h | 10-36 : kuv | 36-54 : kuv | 54-72 : kuv | 72-90 : kuv | 90-126 : kuv | 126-198 : kuv | 198-270 : kuv | 270-378 : kuv |
Lus Cim: Thaum ua qauv hauv qhov dej, lub sijhawm ua kom txias yuav tsum tau nce li ntawm 30%.
Table 11-2-3 Txias lub sij hawm nyob rau hauv cov xuab zeb pwm rau nruab nrab thiab me me castings thaum lub sij hawm ntau lawm pouring
| hnyav / kg | <5 | 5 ~ 10 | 10-30 Nws | 30 ~ 50 | 50 ~ 100 | 100-250 | 250-500 |
| Lub sijhawm txias / min | 8 ~ 12 | 10 ~ 15 | 12-30 Nws | 20 ~ 50 | 30 ~ 70 | 40 ~ 90 | 50 ~ 120 |
Lus Cim: 1. Casting hnyav yog hais txog qhov hnyav tag nrho hauv txhua lub thawv
2, Castings raug yuam kom txias los ntawm qhov cua ntawm cov kab ntau lawm, thiab lub sijhawm txias yog luv.
Lub sij hawm txias hauv pwm ntawm cov hlau loj loj tuaj yeem raug xam raws li cov qauv hauv qab no.
t = vG (2-1)
nyob rau hauv tus qauv t — Casting txias lub sij hawm (h)
v — Casting txias npaum li cas, noj 4 ~ 8h / t
g — Casting hnyav (t)
k yog qhov piv ntawm qhov hnyav ntawm qhov casting rau nws contour ntim. Qhov loj dua tus nqi k, qhov tuab ntawm phab ntsa thickness ntawm cov casting thiab lub sijhawm txias dua. Cov qauv kev suav ntawm k yog
k = G/V (2-2)
nyob rau hauv cov mis k — Qhov hnyav ntawm lub casting thiab nws contour ntim piv (t / m³);
G - Qhov hnyav ntawm casting (t)
V-Gradual txheej contour ntim (m³)
二 、 Lub sijhawm txias ntawm cov hlau castings hauv cov xuab zeb pwm
Hlau castings rau hydraulic xuab zeb tu, tua blasting xuab zeb tu thiab pneumatic cuab yeej xuab zeb tu yuav tsum tau txias rau 250-450 ° C hauv cov xuab zeb pwm kom co tawm. Cov xuab zeb poob siab tshaj 450 ° C tuaj yeem ua rau deformation thiab tawg hauv castings. Lub sijhawm txias hauv cov xuab zeb tuaj yeem pom hauv daim duab 11-2-1 thiab daim duab 11-2-3.
Thaum siv peb daim duab saum toj no, koj yuav tsum xyuam xim rau cov ntsiab lus hauv qab no:
(1) Thaum qhov hnyav ntawm carbon steel casting tshaj 110t, nyob rau hauv lub hauv paus ntawm kev nrhiav lub sij hawm txias tus nqi sib xws rau 110t raws li daim duab 11-2-2, rau txhua qhov ntxiv 1t ntawm qhov hnyav, nce lub sijhawm txias los ntawm 1-3h.
(2) Thaum qhov hnyav ntawm ZG310-570 thiab alloy steel castings ntau tshaj 8.5t, lub sij hawm txias tuaj yeem raug muab faib ua ob npaug piv rau lub sij hawm txias ntawm carbon steel castings tau raws li daim duab 11-2-1 thiab daim duab 11-2-2 .
(3) Thick-walled castings (xws li anvils, thiab lwm yam) nrog cov duab yooj yim thiab cov phab ntsa tuab tuaj yeem loosened (los yog pried xoob) 20-30% ua ntej lub sij hawm cua txias teev hauv daim duab. Xws li cov castings kuj tuaj yeem ua kom txias hauv lub qhov dej tsis muaj kev kho cua sov hauv lub qhov cub, thiab lub sij hawm txuag hluav taws xob yog xam li 1.5-2t txhua 24 teev.
(4) Rau castings nrog complex qauv, loj phab ntsa thickness sib txawv, thiab nws yuav ua rau tawg, lub sij hawm txias yuav tsum yog kwv yees li 30% ntev tshaj li tus nqi teev nyob rau hauv daim duab.
(5) Rau qee qhov pit-shaped castings, lub thawv npog yuav tsum tau muab tshem tawm ua ntej lossis cov xuab zeb pwm yuav tsum tau muab pov tseg. Qhov no yuav ua rau kom qhov txias txias, yog li lub sijhawm txias tuaj yeem raug txo los ntawm 10%.
三 、 Pwm kub ntawm non-ferrous alloy castings
Lub molding kub ntawm non-ferrous alloy castings tuaj yeem pom raws li Table 11-2-4.
Table 11-2-4 Extrusion kub ntawm non-ferrous alloy castings
| Casting yam ntxwv | Casting zog | Alloy casting pej xeem welfare | Casting site ib puag ncig | Casting tawm kub / ℃ | |
| Cov khoom me me thiab nruab nrab | Cov khoom loj | ||||
| Cov duab yooj yim thiab cov phab ntsa tuab | Coreless, ntub core, ntub hom | Qhov nyiam ntawm kub tawg yog me me, xws li AI-Si alloy | Qhov kub thiab txias yog siab dhau thiab tsis muaj cua ntsawj ntshab | 300-500 | 250-300 Nws |
| Cov tub ntxhais qhuav, hom qhuav | 250-300 Nws | 200-250 | |||
| Cov duab yooj yim thiab cov phab ntsa tuab | Coreless, ntub core, ntub hom | Qhov nyiam ntawm kub tawg yog siab, xws li AI-Cu series alloys | Qhov kub thiab txias yog qhov tsawg thiab muaj cov cua ntsawj ntshab | 250-300 Nws | 200-250 |
| Cov tub ntxhais qhuav, hom qhuav | 200-250 | 150-200 Nws | |||
| Cov duab tsis sib xws thiab cov phab ntsa tsis sib xws | Coreless, ntub core, ntub hom | Qhov nyiam ntawm kub tawg yog me me, xws li AI-Si alloy | Qhov kub thiab txias yog siab dhau thiab tsis muaj cua ntsawj ntshab | 200-250 | 150-250 |
| Cov tub ntxhais qhuav, hom qhuav | 150-250 | 100-200 | |||
| Coreless, ntub core, ntub hom | Qhov nyiam ntawm kub tawg yog siab, xws li AI-Cu series alloys | Qhov kub thiab txias yog qhov tsawg thiab muaj cov cua ntsawj ntshab | 150-200 Nws | 100-200 | |
| Cov tub ntxhais qhuav, hom qhuav | 100-150 | <100 | |||
Post lub sij hawm: May-26-2024
