The Inner Fill function is used to fill interior holes and missing geometry on the outer boundary of the parts such as windows, wheel houses, tail light lamps, access holes, bolt holes, etc. as illustrated in Figure 6.1.57.
CREATE SURFACE
This
option allows user to decide if surfaces are generated upon completion of the
inner fill operation.
USE REFERENCE LINE
It is an
advanced option. For filling complicated surface, the user can create some
reference curves to fill the holes.
KEEP TANGENT
This option enables the user to maintain tangency between the existing surfaces and surfaces generated by the fill operation. Figure 6.1.58 illustrates the surface generated with and without tangency option.
Figure 6.1.58 Toggle on/off Keep Tangent option
ADVANCED
The advanced option includes some auxiliary
functions that are mainly applied on single hole fill, as shown in Figure 6.1.59.
These functions are used for generation of reference lines, removal of curves, surfaces
and elements. Detailed description about these functions refers to Section 5.2.11
Surface
Figure 6.1.59 Advanced option
DELETE
This
option enables the user to remove the selected entities from the database.
MORPH HOLE FILL
This
function enables the user to edit the filled hole by adding control lines. Clicking
this button, the program pops up a dialog box illustrated in Figure 6.1.60. The user can toggle on the Tangent
option to maintain tangency between the generated surface boundary after
editing and the part. The user can click the Add, Edit or Remove button to add,
edit or delete control lines, and click Preview to preview the generated
surface after editing.
Figure 6.1.60 Morph hole surface
There are four functions available in Inner Fill dialog box: Auto Fill, Hole Fill, Curve Fill and Polygon Fill.
TO PART
The user
must specify a part prior to hole fill. The user may directly input a part name
or click the select part button to select a created part.
·
AUTO FILL
After
selecting this button and clicking Apply, the program will automatically find
all the inner holes and highlight their boundaries, as shown in Figure 6.1.61.
Figure 6.1.61 Before Inner Fill
Simultaneously, eta/DYNAFORM prompts:
CLICK ON INNER BOUNDARY TO
DE-SELECT
MIDDLE MOUSE BUTTON – DONE, RIGHT
MOUSE BUTTON - CANCEL
If there are holes which do not need to be filled, the user can de-select them by mouse cursor and click on the middle mouse button to confirm. The result is shown in Figure 6.1.62.
Figure 6.1.62 After Inner Fill
UNDO
If the user is not satisfied with the result of Auto Fill, he/she can select Undo button to cancel this result.
EXIT
Exit the Inner Fill interface.
·
HOLE FILL
This
function allows the user to fill holes individually. Once this function is
selected, the boundaries of all the inner holes on the current screen are
highlighted. The program prompts the user to select an inner boundary to be
filled by using the left mouse button. After an inner boundary is selected, the
program will automatically fill the hole, as illustrated in Figure 6.1.63.
Figure 6.1.63 Boundary Lines of Inner Holes
If Hole Fill function is selected,
the Use Reference Line option is activated for the user to create some
reference lines for hole filling, as illustrated in Figure 6.1.64.
Figure 6.1.64 Filled Mesh within a Closed Curve
·
CURVE FILL
This
function allows the user to fill a cut-out area. Click Apply to highlight all
the boundaries. The program will prompt:
SELECT
A BOUNDARY TO FILL
Use the
left mouse button to select a point on the boundary line to be filled. The
program prompts:
SELECT
A LINE TO CLOSE THE OPEN AREA
Select an
existing line as the outer boundary to finish filling.
Figure 6.1.65
Before Curve Fill
Figure 6.1.66 After Curve Fill
Figure 6.1.65 and Figure 6.1.66 show the filling process in an open area using spline curve.
·
POLYGON FILL
This
function allows the user to select a set of nodes as the boundary edge to
create a mesh to fill the boundary. After the function
is selected, the Select Nodes dialog box is displayed. The following message is
printed in the message prompt window:
SELECT A SET OF NODES IN SEQUENCE
ALONG THE BOUNDARY
After
a set of nodes is selected, eta/DYNAFORM will generate a set of elements to
fill the inner boundary.