Cov yam ntxwv uas cuam tshuam rau qhov tseeb ntawm Castings hauv Precision Castings

Precision casting yog ib txoj kev tshwj xeeb casting piv rau cov txheej txheem casting ib txwm. Nws tuaj yeem tau txais cov duab zoo thiab qhov tseeb casting qhov tseeb, ntxiv rau, cov khoom lag luam yog qhov tseeb, txoj hauv kev, ze rau qhov kawg ntawm qhov, tuaj yeem siv ncaj qha yam tsis muaj kev ua haujlwm lossis kev ua haujlwm tsawg heev, yog cov txheej txheem siab heev hauv kev lag luam casting. zoo ib yam li molding.

Precision casting txheej txheem:

Ciab nias----- ciab trimming----- ciab tshuaj xyuas----- pawg ntoo----- plhaub ua----- dewaxing (steam dewaxing), ----- pwm plhaub roasting{ {6}} Laboratory (spectral assay chemical muaj pes tsawg leeg) - pouring (poov hlau molten nyob rau hauv lub puab plhaub), ---- vibration shelling, shelling----- casting thiab pouring pas nrig txiav thiab sib cais---- sib tsoo , rooj vag --- kev kho cua sov---- tua blasting---- kev tshuaj xyuas dawb huv---- machining----- kev kho deg---- tiav cov khoom tshuaj xyuas---- warehousing

Cov yam ntxwv cuam tshuam rau qhov tseeb ntawm castings:

Nyob rau hauv ib txwm muaj qhov xwm txheej, qhov tseeb qhov tseeb ntawm qhov tseeb castings cuam tshuam los ntawm ntau yam xws li cov qauv casting, cov khoom siv casting, molding, plhaub ua, roasting, pouring, thiab lwm yam, thiab ib qho ntawm cov kev sib txuas tau teeb tsa thiab ua haujlwm tsis tsim nyog yuav hloov pauv tus nqi shrinkage. ntawm qhov casting, uas ua rau muaj qhov sib txawv ntawm qhov tseeb qhov tseeb ntawm qhov casting thiab qhov yuav tsum tau ua. Cov hauv qab no yog cov yam ntxwv uas tuaj yeem ua rau qhov tseeb qhov tsis xws luag hauv precision castings:

(1) Kev cuam tshuam ntawm cov qauv casting: a. Lub phab ntsa thickness ntawm lub casting yog loj, thiab phab ntsa ntawm casting yog nyias, thiab shrinkage yog me me. b. Tus nqi shrinkage dawb yog loj, thiab tus nqi hindered shrinkage yog me me.

(2) Kev cuam tshuam ntawm cov khoom siv casting: a. Qhov siab dua cov ntsiab lus carbon nyob rau hauv cov khoom, qhov me me ntawm linear shrinkage, thiab qis cov ntsiab lus carbon, qhov ntau dua linear shrinkage. b. Lub casting shrinkage ntawm cov khoom siv yog raws li nram no: casting shrinkage K=(LM-LJ)/LJ × 100%, LM yog kab noj hniav loj, LJ yog qhov loj casting. K yog cuam tshuam los ntawm cov hauv qab no: ciab pwm K1, casting qauv K2, alloy hom K3, pouring kub K4.
(3) Kev cuam tshuam ntawm pwm ua rau ntawm qhov shrinkage tus nqi ntawm cov kab casting: a. Qhov cuam tshuam ntawm kev txhaj tshuaj wax kub, wax txhaj tshuaj siab thiab tuav lub sij hawm ntawm qhov loj ntawm cov pwm peev yog qhov pom tseeb tshaj plaws nrog rau qhov kub thiab txias, ua raws li kev txhaj tshuaj siv quav ciab, thiab lub sijhawm tuav tsis tshua muaj kev cuam tshuam rau qhov kawg ntawm qhov loj me. peev pwm tom qab ua tiav cov peev txheej molding. b. Cov linear shrinkage ntawm wax (pwm) cov khoom yog hais txog 0.9-1.1%. c. Thaum lub peev pwm khaws cia, nws yuav qis dua, thiab nws cov nqi shrinkage yog kwv yees li 10% ntawm tag nrho cov shrinkage, tab sis thaum nws khaws cia rau 12 teev, qhov loj ntawm peev pwm yog qhov ruaj khov. d. Lub radial shrinkage ntawm cov quav ciab pwm tsuas yog 30-40% ntawm qhov shrinkage nyob rau hauv qhov ntev kev taw qhia, thiab lub zog ntawm cov wax txhaj tshuaj kub nyob rau hauv lub dawb shrinkage yog ntau ntau dua li lub zog ntawm lub hindered shrinkage (lub wax txhaj tshuaj kub. yog 57-59 degree, qhov kub thiab txias, qhov ntau dua qhov shrinkage).

(4) Kev cuam tshuam ntawm cov khoom siv plhaub: kev siv zircon xuab zeb, zircon hmoov, Shangdian xuab zeb, Shangdian hmoov, vim nws qhov me me expansion coefficient, tsuas yog 4.6 × 10-6 / degree, yog li nws tuaj yeem tsis quav ntsej.

(5) Kev cuam tshuam ntawm lub plhaub roasting: vim qhov me me expansion coefficient ntawm lub plhaub, thaum lub plhaub kub yog 1150 degree, nws tsuas yog 0.053%, yog li nws tseem tuaj yeem tsis quav ntsej.

(6) Kev cuam tshuam ntawm qhov kub thiab txias: qhov siab dua qhov kub, qhov ntau dua qhov shrinkage, thiab qhov kub ntawm lub ncuav qis dua, qhov me me ntawm qhov shrinkage, yog li qhov ntsuas kub yuav tsum tsim nyog.