Greetings to all!! Need some recommendations for a Hydraulic Punch and Die for punching 1/8” hard black plastic. We are currently using one setup on a 3 ton arbor press with a 3’ handle. Pulling force is (guessing) around 50-60 pounds. The set up punches holes in office chair backs. The original owner (deceased) doesn’t have any records or specifications on what looks like a professionally made Punch and Die. We added a new back that needs a different size opening and that is where the fun begins. I gave the punch to our machine shop who makes some of the parts for us. They can’t handle making and hardening a new one and called some professional companies who want a couple of thousand dollars to make the set and are too busy to bother with it.
Original punch is two 5/8” holes about 1-1/2” overall length. The new set needs one of the holes to be 1-1/8” and same overall length. Think of a cross section of a pill capsule and a pear respectably.
What would be the best steel to use? What kind of clearance tolerances? What hardening procedure would be best? Lastly I’m thinking of dishing the punch to get more of a shearing action. Looked around on the Internet and couldn't find any information that was relevant.
Thanks to all in advance. Charles
Original punch is two 5/8” holes about 1-1/2” overall length. The new set needs one of the holes to be 1-1/8” and same overall length. Think of a cross section of a pill capsule and a pear respectably.
What would be the best steel to use? What kind of clearance tolerances? What hardening procedure would be best? Lastly I’m thinking of dishing the punch to get more of a shearing action. Looked around on the Internet and couldn't find any information that was relevant.
Thanks to all in advance. Charles