(1) Tsim nyog tsim cov qauv ntawm castings
Qhov ntau ntawm cov duab ntawm casting, qhov sib txawv ntawm phab ntsa thickness ntawm qhov sib txawv, qhov sib txawv ntawm qhov kub thiab txias thaum lub sij hawm txias, thiab qhov ntau dua qhov kev ntxhov siab casting. Yog li ntawd, thaum tsim castings, kev siv zog yuav tsum tau ua kom ntseeg tau tias cov duab ntawm cov castings yog qhov yooj yim, symmetrical, thiab phab ntsa thickness yog uniform.
(2) Kev siv cov txheej txheem solidification ib txhij
Qhov hu ua simultaneous solidification yog hais txog kev siv qee qhov kev ntsuas thev naus laus zis los txo qhov kub ntawm qhov sib txawv ntawm ntau qhov chaw ntawm cov casting thiab yuav luag ib txhij solidify. Vim yog qhov sib txawv me me ntawm qhov sib txawv ntawm ntau qhov chaw, nws tsis yooj yim los tsim thermal stress thiab cracking, thiab deformation ntawm casting yog me me. Sim txhim kho cov txiaj ntsig ntawm cov pwm thiab cov tub ntxhais, thiab tsim nyog teeb tsa lub rooj vag thiab riser. Daim duab schematic ntawm ib txhij solidification, uas yuav ntxiv cov hlau txias rau cov phab ntsa tuab ntawm lub workpiece thiab teeb tsa ib phab ntsa nyias ntawm lub riser.
(3) Kev laus kev kho mob yog ib qho kev ntsuas zoo los tshem tawm kev ntxhov siab.
Kev laus muaj xws li natural aging, thermal aging, thiab resonance aging. Lub npe hu ua natural aging yog hais txog kev tso cov casting rau hauv qhov chaw qhib rau ntau tshaj li ib nrab xyoo kom tshem tawm cov kev ntxhov siab sab hauv. Thermal aging (artificial aging), tseem hu ua stress relieving annealing, yog tus txheej txheem ntawm cua sov casting rau 550-650 degree, tuav nws rau 2-4 teev, txias nws nyob rau hauv lub cub tawg rau 150-200 T, thiab tom qab ntawd tso tawm. Txoj kev resonance yog vibrate lub casting ntawm nws resonance zaus ntawm 10-60ndn kom tshem tawm cov residual kev nyuaj siab nyob rau hauv lub casting.
