Cov punch yog cov xovxwm stamping, uas yog siv cov xuas nrig ntaus los ntawm kev tuag los ua blanking, xuas nrig ntaus, sib sau, kos duab, trimming, nplua blanking, shaping, riveting thiab extrusion. Cov txheej txheem stamping muaj qhov zoo ntawm kev txuag cov ntaub ntawv thiab lub zog piv nrog cov tsoos machinery, kev ua haujlwm siab, tsis tshua muaj kev xav tau rau tus neeg teb xov tooj, thiab cov khoom uas tsis tuaj yeem ua tiav los ntawm machining los ntawm ntau yam kev siv tuag. Punch processing yog dav siv nyob rau hauv ntau yam teb, xws li keyboards thiab sockets, khob, cupboards, saucers, computer case, thiab txawm missile aircraft.