Manufacturing Solutions

Blankholder

Blankholder

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Blankholder

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The Blankholder panel allows you to specify blankholder parameters.  From the Setup menu, select Blankholder to display this panel.

blankholder_panel

Before you specify blankholder parameters, you must organize the elements to be defined as the blankholder.  You can define the blankholder force in two ways: tonnage force or pressure level (high, medium and low).

Note:The pressure level is proportional to the area of blank under the blankholder as well as thickness.  A pressure level of 2MPa, 5MPa and 10MPa for a 1mm blank has been chosen as a reference for Low, Medium, and High (based on practical experience).  The tonnage (metric ton unit) is equivalent to the pressure times the blankholder area normalized/scaled by the thickness (1 metric ton = 9810N).

 

How do I...

expand-green-10Specify a Blankholder
1.Select the on element subpanel.
2.Click blankholder: and select a blankholder name.
3.Click elems and use the extended entity selection menu to specify the elements.
4.Click create.
5.Click friction = and enter the friction value.
6.Select the method of applying Blankholder force.

-        For tonnage, enter the value

-        For pressure level, select High, Medium or Low.

7.Click update.

 

expand-green-10Apply blankholder force along the edge of the part
1.Select the on edge subpanel.
2.Type a name in the blankholder field.
3.Click on two nodes along the edge of the part.
4.Toggle the search direction to whole edge, clockwise or counter-clockwise.
5.Type a value for the blankholder force (N/mm) or choose high, medium, or low.
6.Click create.

The edge blankholder segment between the two selected nodes is displayed with a colored line.

The applied qualitative force is based on a locking (necking) force , first computed in the background, then 80 percent, 50 percent, and 20 percent of that value is used for high, medium, and low conditions respectively.

7.To apply a force on a different edge of the part, repeat steps 1 through 7.  
Note:You should be able to update the location and force value or level for any existing edge blankholder segment.

 

See also

Alphabetical List of Panels