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 6.4.8 shows the control parameters in the dialog window.
Figure 6.4.8 Parameters for Tear Drop Head
2.Draw bar ends with a conical shape (tear drop tail). Figure 6.4.9 shows the parameters in the dialog window.
Figure 6.4.9 Parameters for Tear Drop Tail
3.Tear Drop (draw bar without main body). Figure 6.4.10 shows the parameters in the dialog window.
Figure 6.4.10 Parameters for Tear Drop
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: Tail Circle Radius
- 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 6.4.11a. If the user wishes to define the element size of the drawbar, un-check the AUTO ELEMENT SIZE option. The dialog window will be changed to Figure 6.4.11b to allow the user to enter the desirable element size.
Figure 6.4.11a Drawbar with Auto Element Size Figure 6.4.11b Drawbar With User Defined Element Size
Select one type of drawbar. Draw bar ends with 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 6.4.8, Figure 6.4.9, or Figure 6.4.10.
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.
Define the center line of the drawbar. The center line is the center of the drawbar¡¯s main body, including both ends.
If there is a center line in the current database, click the SELECT
CENTER LINE button to select the center line, or click the CONSTRUCT
CENTER LINE button to create a line by selecting nodes on the mesh.
If the draw bar type is Tear drop, the program will display a dialog window
as shown in Figure 6.4.12. Click the SELECT TWO NODES button to
select two nodes to define the direction of the center line. The head of the
Tear drop will be placed at the first selected node. The length of the Tear
drop is determined by the parameters defined in the PARAMETER window.
Figure 6.4.12 Tear Drop
Figure 6.4.13 shows the details of three types of drawbars.
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Figure 6.4.13 Three Types of Draw bars