Punch pressure uneven, in the course of the work out of the product depth of uneven, deep and shallow, how to repair? There is always the sound of the card issued how
In the stamping process, this is the punching machine bottom dead center precision problem, usually in the mold to join the bottom dead center ceiling block, and then install the mold when the mold will be adjusted to increase the amount of pre-pressure can improve the problem
Not necessarily, work for some time will automatically change
