CREATE PROPERTIES
In the eta/DYNAFORM, each drawbead carries its own property. Prior to creating the drawbead, the user must define the property accordingly. In the create property field, the NEW, EDIT, DELETE functions enable the user to create, modify and delete the property, respectively.
Click on the NEW
button to display the DRAWBEAD PROPERTY dialog box as shown in Figure
Figure
SECTION TITLE
Allow the user to name title for the property, the default title is bead1, bead2 and so on.
STATIC FRICTION COEF.
Allow the user to set the static coefficient of friction between the blank and the drawbead, the default static coefficient of friction is 0.1.
DYNAMIC FRICTION COEF.
Allow the user to set the dynamic coefficient of friction between the blank and the drawbead, the default dynamic coefficient of friction is 0. It means the dynamic friction between the blank and the drawbead is ignored.
BENDING LOAD CURVE ID
Allow the user to define the Fbending
component of the drawbead restraining force. The Fbending
component is referred as force per unit drawbead length as a function of
displacementas illustrated in Figure
NOTE: The
Figure
The user can click on the button to define the
bending curve for the property using the DRAWBEAD LOAD CURVE dialog as
illustrated in Figure
AUTO – This function enables the user to create bending curve according to the
drawbead section figure and the material of the blank as illustrated in Figure
MANUAL – This function enables the user to manually create a bending curve for
the property using the function in the dialog box as illustrated in Figure
Figure
Figure
Figure
FULL LOCK FORCE
This is an optional method to define the BENDING FORCE for the drawbead. If the checkbox is toggled on, the user can manually key in the FULL LOCK FORCE value in the input data field or click on the DEFAULT button to calculate the default full lock force. Then, the BENDING FORCE will calculate automatically according to the FULL LOCK FORCE.
NOTE: The default FULL LOCK FORCE is calculated by the material ultimate tensile strength and the thickness of the blank. The user has to define the blank material and properties prior to obtaining the default FULL LOCK FORCE.
DRAWBEAD DEPTH
Allow the user to define the depth of the drawbead, The default depth of drawbead is set as 1.0 (mm).
BENDING CURVE SCALE
Allow the user to set the scale factor for the BENDING CURVE. The default scale factor is set as 1.0 (or 100%).
After the user creates each new property, the new property is added to the property list and set as the current property.
This function enables the use to edit the current property.
This function enables the use to remove the current property.
NOTE: The current property can be removed only if the current property is not assigned to any drawbead. Else, the following message is printed in the message prompt window:
THE PROPERTY ASSIGNED TO DRAWBEAD. CAN NOT BE DELETED.