Any feedback for this matter?
There is one customer had this problem like you are facing right now in last year Feb.. We recommend that customer using hydraulic press machine to change the blanking punch. Right now, they send back the blanking punch with holder plate to us while they need to replace the blanking punch. Till now, they do not have this problem anymore.
If there is anything else I can do for you regarding this matter, please feel free to contact me at any time. Thank you!