Lub hauv paus ntsiab lus ntawm cov ntawv hlau stamping yog ua cov ntawv hlau siv cov khoom siv stamping thiab tuag. Cov khoom siv stamping feem ntau suav nrog cov tshuab nias lossis hydraulic presses, thaum cov tuag muaj qhov tuag sab sauv thiab qis dua.
Thaum cov ntawv hlau muab tso rau ntawm qhov tuag, cov khoom siv stamping siv lub siab, ua rau daim ntawv deform lossis cais raws li cov duab ntawm cov tuag. Cov txheej txheem no tuaj yeem muab faib ua ob peb kauj ruam: ua ntej, kev npaj cov khoom siv, xaiv cov ntawv hlau tsim nyog; thib ob, kev ua haujlwm stamping, ua cov ntawv siv cov tuag; thiab thaum kawg, tshaj tawm - ua, xws li deburring thiab kho deg.