INTERIOR CUTTING DIES

 

1. Tool Steel
2. Supplies
3. Preparation
4. Layout Fluids
5. The Design
6. Clamp Plates
7. Drill Holes
8. Taper Holes
9. Thread Holes
10. Attach Plates
11. Drill Access Hole
12. Cut Interior Die
13. Two Methods
14. Stripper Plate 1
15. Stripper Plate 2
16. Make the Hinge
17. Cut Exterior Die
18. Assemble Plates
19. Final Alignment
20. Bend top Plate
21. Bend Bottom Plate
22. Heat Treating
23. Blanking
24. Notes
25. General Info

INTERIOR CUTTING DIES
Two Methods back | next

IT'S DECISION TIME, FOLKS!
When the die-set is used to blank out a part, the interior piece is shoved upwards and will fall out into your hand when the die-set is turned over. The exterior piece is shoved downwards and becomes trapped by the punch. The part is a bit difficult to remove and a choice of methods has to be made at this time. Your decision determines the next step in making the die-set.

Method #1: Using a Knife
A relatively simple method to remove the part is to use a thin knife blade to slide between the metal and the bottom plate and gently pry the metal off of the punch. This can be time consuming and the likelihood of tweaking the metal is significant.

Note: This operation is shown out of sequence, because a choice of how to proceed must be made now.

Method #2: Using a Stripper Plate
A much better way is to make a stripper to push the metal off of the punch. To accomplish this, a number of holes are drilled around the punch that will allow short pins to push against the metal and push it off of the punch. These pins are fastened to a plate, called a stripper plate. Drill a series of holes around the periphery of the punch as shown here.

If you are going to make a stripper plate, follow the directions in the next two steps. Otherwise skip ahead to step #16 (Make the Hinge).

Download Catalogue
© Copyright 2006 Bonny Doon Engineering, Inc. All rights reserved.