Insert Undercut

Undercut is a special machining operation that is required in cavities to ensure increased flow requirements through ports of the same size. Undercut increases the port area to handle the increased flow. This section shows how to model undercuts using MDTools^® 965.

Insert an optional undercut in a selected cavity on a manifold. MDTools inserts an undercut in a cavity at the specified depth from the cavity’s face and at a specified angle from the center of the selected cavity.

1.     MDTools 965 > Undercut

The Insert Undercut dialog box displays.

2.     Select the cavity in which you want to insert the undercut.

3.     Select any optional undercut from the list, if defined for the cavity or Select the port area of the cavity.

Default values for the undercut per the selected port/optional undercut are displayed.

4.     Select/Deselect Concentric, if required.

This option is available for undercuts at zero offset distance.

Diameter should be larger than the selected port starting step diameter for concentric undercut.

5.     Enter Undercut ID.

<Selected Cavity ID>_UC is the default component ID. 
For example, if the ID of the selected cavity is 23, then by default the component ID for the undercut will be 23_UC.

6.     Modify the Offset distance, as required.

Modify the desired distance between the center of the undercut and the selected cavity.

7.     Modify the Undercut diameter, as required.

Undercut diameter should be larger than the selected port diameter.

8.     Modify the Undercut depth.

Modify the desired depth of the undercut from the spot face of the cavity.

9.     Modify the Undercut height, as required.

Default value is the diameter of the selected port.

10.  Select the Orientation from the drop-down list or enter the orientation angle.

Enter the orientation angle between 0 to 360 degrees.

11.  Enter the machining ID.

12.  Click OK.

MDTools automatically creates an undercut in the selected cavity.

Note:

·       Use $DIA, $DEPTH, $OFFSET & $HEIGHT for the machining sequence of any field for easy maintenance of the Machining chart information.

·       $DEPTH is measured from the surface of the manifold in the Machining chart.

·       Optional undercuts linked to the cavity inside the Library Manager are displayed in the Optional Undercuts drop-down list.

·       Mandatory undercuts can be defined inside the Library Manager for a cavity. and this undercut is created automatically when the cavity is inserted.

·       Insert an undercut in the dead area of a cavity when the Concentric option is selected.

·       Insert an undercut overlapping with dead area and working area.