rated tool life of cutting punch and die?

[rogieanastacio]

please help!! how can i be able to determine the theoretical rated life (in strokes) of a cutting parts such as punch and die in a tool and die application?
Considering the given..( mechanical property of the cutting members, Force of the press, workpiece mechanical properties and thickness and the geometry of the pierced part and etc.)

[ggathen]

Originally Posted by rogieanastacio

please help!! how can i be able to determine the theoretical rated life (in strokes) of a cutting parts such as punch and die in a tool and die application?
Considering the given..( mechanical property of the cutting members, Force of the press, workpiece mechanical properties and thickness and the geometry of the pierced part and etc.)

I assume you mean life between sharpenings Total life will depend on the amount of die life (punch length and entrance) This is a complex problem.

Sharp corners, thin blades, amount and geometry of shear, cutting steel hardness and toughness,die lubricant, die and press alignment, surface angle of the part at the cutting area, press speed, guiding of the punch (if any), amount and consistency of the punch-to-die cutting clearance (breakage), hole dimensional tolerance, and other factors will all have an impact on the life of the cutting components.

Suggestions: Call a punch and button manufacturer. They will want all the specifications you mentioned as well as a 3-D drawing of the part. Other suppliers may also be able to help, such as cutting steel material manufacturer, steel mill, heat treat source, etc. If you can, you will learn much by doing a series of actual tests before and during production.