Txheej txheem cej luam ntawm Valve Casting

1. Dab tsi yog casting

Cov hlau ua kua raug nchuav rau hauv lub pwm uas muaj cov duab zoo rau qhov khoom, thiab tom qab nws khov lawm, ib qho khoom nrog qee yam duab, qhov loj me thiab qhov zoo ntawm qhov chaw tau txais, uas hu ua casting. Peb lub ntsiab lus tseem ceeb: alloy, modeling, pouring thiab solidification. Qhov zoo tshaj plaws: cov khoom nyuaj tuaj yeem tsim tau.

2. Kev txhim kho ntawm kev casting

Kev tsim khoom pib xyoo 1930 los ntawm kev siv cov tshuab pneumatic thiab cov txheej txheem xuab zeb av nplaum cuav.

Hom xuab zeb cement tau tshwm sim hauv xyoo 1933

Xyoo 1944, hom xuab zeb tawv tawv uas muaj txheej txheej txias tau tshwm sim

CO2 hardened dej iav xuab zeb pwm tshwm sim hauv xyoo 1947

Xyoo 1955, hom plhaub xuab zeb thermal coating resin tau tshwm sim

Xyoo 1958, cov pwm xuab zeb furan resin uas tsis yog-ci tau tshwm sim

Xyoo 1967, cov pwm xuab zeb cement tau tshwm sim

Xyoo 1968, cov iav dej uas muaj cov organic hardener tau tshwm sim

Tau 50 xyoo dhau los no, muaj ntau txoj kev tshiab los ua pwm los ntawm kev siv lub cev, xws li: magnetic pellet molding, vacuum sealing molding, lost foam molding, thiab lwm yam. Ntau txoj kev casting raws li cov pwm hlau. Xws li centrifugal casting, high pressure casting, low pressure casting, liquid extrusion, thiab lwm yam.

3. Cov yam ntxwv ntawm kev pov tseg

A. Kev hloov pauv tau dav thiab yooj ywm. Txhua yam khoom siv hlau. Kev casting tsis txwv los ntawm qhov hnyav, qhov loj me thiab cov duab ntawm qhov. Qhov hnyav tuaj yeem yog los ntawm ob peb grams mus rau ntau pua tons, phab ntsa tuab tuaj yeem yog los ntawm 0.3 hli mus rau 1m, thiab cov duab tuaj yeem yog cov khoom nyuaj heev.

B. Feem ntau ntawm cov ntaub ntawv nyoos thiab cov khoom siv pabcuam siv yog los ntawm ntau qhov chaw thiab pheej yig, xws li cov hlau seem thiab xuab zeb.

C. Kev ua cov castings tuaj yeem txhim kho qhov tseeb ntawm qhov ntev thiab qhov zoo ntawm cov castings los ntawm kev siv tshuab casting siab heev, yog li ntawd cov khoom tuaj yeem txiav tsawg dua thiab tsis tas txiav.