Industrial Blacksmithing-Slug Punching a Hole, Part Two

This shows the conclusion of the punching operation. After going most of the way through from one side, the piece is flipped over, the punch is lined up over the hole, and then driven down. This shears out a thin disk of metal (slug, where the process gets its name from), thus leaving a nice clean hole. Then I go back and flatten things out and round up the disk a bit.

About 1/3 of the way through, you can see the slug fall out. I then put a tool called a bolster (nothing more that a piece of steel with a hole in it) under the workpiece so the punch can be driven all the way through.

You can

Category:

Science & Technology

Tags:

• Blacksmithing
• Industrial
• Say
• Mak
• power
• hammer
• pneumatic
• forge
• punch
• tong
• disk
• steel
• slug
• doughnut
• bolster