eta/DYNAFORM provides four methods for auto tipping and user define, as illustrated in Figure 7.1.60.

Figure 7.1.60  Auto tipping

·                AVERAGE NORMAL

This function automatically rotates the part to an appropriate stamping position by averaging all normal vectors of elements to minimize undercut.

·                SURFACE NORMAL

This function enables the user to tip by using the normal of the selected surface.

·                MIN DRAW DEPTH

This function enables the user to tip by calculating the minimum draw depth of the part.

·                MAX WIDTH

Calculate the maximum width of part and keep it consistent with U direction. The part only rotates about W-Axis during tipping.

·                USER DEFINE

This function allows the user to define stamping direction by defining a direction vector. Upon clicking this button, the program will pop up a Vector dialog box illustrated in Figure 7.1.61. Refer to Section 5.1.4 Shortest Curve for detailed description about defining direction vector.

Figure 7.1.61  Define Vector