DRAWBAR
The drawbar menu provides functions to generate drawbars in the die. There are three types of drawbars available:
1.
DRAW BAR ENDS
WITH A SPHERICAL SHAPE (TEAR DROP HEAD). Figure
.
Figure
2.
DRAW BAR
ENDS WITH A CONICAL SHAPE (TEAR DROP TAIL). Figure
Figure
3.
TEAR DROP (DRAW
BAR WITHOUT MAIN BODY). Figure
Figure
Control Parameters:
Rs: Drawbar Radius
Rf: Fillet Radius
Wh: Wall Height (can be zero)
Sw: Top Strip Width (can be zero)
A: Wall Angle (default of 6 degrees)
Rt:
Lt: Length of Tear Drop
Create a drawbar using the following steps:
.
Click the DRAWBAR
function, Figure 6.4, and the program will display a dialog window as shown in
Figure
Figure
. Select one type of drawbar. DRAW BAR ENDS WITH A SPHERICAL SHAPE (TEAR DROP HEAD) is used as the default selection.
.
Click the
PARAMETERS button, and the program will display the corresponding dialog window
as shown in Figure
. Select the element size for the drawbar, either by AUTO ELEMENT SIZE or by user-defined element size. The default option is AUTO ELEMENT SIZE where the element size of the draw bar is calculated based on the connecting mesh of the tool. The user may define any other value suitable for the specific requirements.
. The CREATE DRAWBAR SURFACE option will generate the surfaces when the drawbar mesh is created. This option is selected as default. The user may disable the option if the drawbar surface is not required.
. Define the centerline of the drawbar. The centerline is the center of the drawbar's main body, including both ends.
. If there is a centerline in the current database, click the SELECT CENTER LINE button to select the centerline, or click the CONSTRUCT CENTER LINE button to create a line by selecting nodes on the mesh.
. After the drawbar parameters and centerline are defined, click the APPLY button to generate the drawbar. The program will activate the mesh acceptance buttons and prompt the user to accept the drawbar mesh. Click YES to keep the drawbar mesh and NO to reject the mesh. The REVERSE button is used to put the drawbar on the opposite side of the tool. If the CREATE DRAWBAR SURFACE option is selected, the drawbar surface will be generated with the mesh.
If the draw bar type is tear drop, the program will display a dialog window as
shown in Figure
Figure
Figure
Figure