Qhov ua haujlwm ntawm txhaj mould yog kev sib xyaw ntawm cov khoom siv raw.Hauv Suav teb ， ntau lub tuam txhab tsis tuaj yeem yuav cov khoom lag luam tiag tiag.Kev xaiv cov khoom siv ， cov khoom tsis zoo ， thiab tsis hnav tsis kam; cov khoom siv ntawm kev txhaj tshuaj pwm yog lub neej ua haujlwm ntawm pwm ， thiab qhov zoo ntawm cov pwm raug txo vim muaj teeb meem nrog cov khoom pwm.Qhov tseem ceeb ， Kev kho cua sov ntawm cov pwm kuj tseem yog qhov tseem ceeb ntawm qhov zoo ntawm cov pwm.Because cov khoom pwm tsis tsim nyog lossis kev kho kub tsis ua haujlwm ， qhov zoo ntawm cov pwm kuj tseem yog qhov tseem ceeb.Ib yam ， cov hlau pwm tsis ua kom zoo ， muaj ntau ntawm cov khoom tsis tuaj yeem ， cov punch thiab concave pwm ， cov txheej txheem forging yog tsis muaj qhov zoo tshaj plaws a Muaj kev phom sij raug zais ntawm kev kho cua sov.
Cov txheej txheem tsim tsis zoo tag nrho - feem ntau ua rau pom qhov tsis zoo ntawm qhov tsis zoo sab hauv ntawm cov punch thiab tuag kev zam txim ， muaj teeb meem nrog cov txheej txheem kev kho cua sov thiab cov txheej txheem ， kev tawm tsam ntawm qhov punch tuag ， cov mos mos thiab lub zog tsis sib xws. Txawm tias qhov sib tsoo ， sib tsoo thiab polishing tsis nyob hauv qhov chaw ， qhov saum npoo roughness tus nqi loj dhau.Qhov kev ua lag luam xav tau cov pwm sab nraud zoo dua thiab tsim qauv zoo nkauj.Nws yog cov haujlwm uas yuav tsum tau ua hauv cov txheej txheem tsim.Finally ， ntawm ib sab tes Tus nqi ntawm cov qis npog phaj pwm Cov cuab yeej tsim pwm tsim thiab kev ua hauj lwm ntau lawm tus nqi pwm yog qhov tseem ceeb ntawm kev txhim kho pwm kev lag luam.Kev ua raws li kev cai tsim nyiaj txiag thiab kev tswj hwm nyiaj txiag ruaj khov ， muaj zog los txhawb txoj kev loj hlob ntawm kev ywj pheej kev tsim kho tshiab thiab kev hloov pauv hloov optim thiab kho kom pom tus qauv kev lag luam ， qhov xav tau siab Cov theem ntawm pwm tshuab thiab cuab yeej siv tau qhov chaw nthuav dav rau kev tsim kho pwm kev lag luam.
