Creating User-Defined Stamping Features

Two user-defined stamping features are available:

Create a punch with die:  define the punch and die features, select a base feature, choose the punch and die as stamping elements, select an edge on the base surface and give an angle for orientation purposes.
Create a punch with opening faces: define the punch, select a base feature, define the opening faces of the punch, select an edge on the base feature and give an angle for orientation purposes.
  Edit a user-defined stamp: double-click the existing stamp and change its type, or select, or remove opening faces

What You Should Know 

In both tasks illustrating either a stamp based on a punch with die, or a punch with opening faces, the punch positioning is defined as below:

Defining the Punch in Relation to the base feature to be Stamped

The punch is defined within the absolute (default) axis-system of the .CATPart document. (o, x, y, z) is the axis associated with the punch. The punching direction on the punch (Dp) must be equal to z.

The punching direction on the base feature (Dw) is normal to the selected base feature face, and is oriented from the selected base feature face towards the opposite face.
The punch is applied matching Dp on Dw and matching the punch's (x, y) plane onto the selected base feature face:

Defining the Die in Relation to the base feature to be Stamped

This is useful only when defining a punch with die, and does not apply to punches with opening faces.
The die is also defined within the absolute (default) axis-system of the .CATPart document. (o, x, y, z) is the axis associated with the punch. The punching direction on the die (Dd) must be equal to z.

The illustration is a section view of the die.

The die is applied matching Dd on Dw and matching the die's (x, y) plane onto the selected face: