TWO-LINE BINDER
The TWO-LINE
BINDER function is used to create a binder with curvatures in both the X and Y
directions. The dialog box is illustrated in Figure
Figure
The BINDER MARGIN and BINDER SHIFT parameters are used to control the binder size and position relative to the part, respectively.
• BINDER MARGIN
This function allows the user to expand the binder
size. The value of the BINDER MARGIN is the distance between the boundary of
the original binder and the expanded binder. Please see the Figure
Figure
• BINDER SHIFT
This function is used to adjust the shortest vertical
clearance between the part edge and the binder surface. If positive
BINDER SHIFT is entered, the binder will be shifted along the -Z axis and vice
versa. The BINDER SHIFT directly affects the draw depth of a part.
Please see the Figure
Figure
• DEFINE BINDER ORIENTATION
The DEFINE BINDER ORIENTATION function controls the U-V direction of the binder surface.
When the button is clicked, the part is displayed in the X-Y view. The POINT OF FIRST CONTACT is highlighted with a white circle and the following message is printed in the message prompt window:
CLICK AND HOLD THE LEFT MOUSE BUTTON AT THE
MOVE THE MOUSE TO ROTATE. RELEASE THE MOUSE BUTTON WHEN DONE
As illustrated in Figure
• TRIM REFERENCE LINE
The shape of the binder is determined by the following
factors: reference point, orientation of the U-V axes, length of the U-V axes,
and the part geometry. If some of the details on the part are not
acceptable during creation of binder shape, the user can truncate the reference
line to adjust the curvature of the binder. Figures
Figure
Figure
The following steps are needed to create a binder:
1. Enter the BINDER MARGIN and BINDER SHIFT.
2. Define the proper orientation of the U-V direction.
3. Adjust the binder shape by using the TRIM REFERENCE LINE function.
4. Click the CREATE button at the bottom of the dialog box. eta/DYNAFORM generates the binder surface and stores it in a new part named C_BINDER. The part is automatically assigned as TOOL (binder). Refer to Section 9.2 for a detailed explanation on the TOOL part.
5. If a binder has already been created in the C_BINDER
part, a DYNAFORM QUESTION dialog box as illustrated in Figure
Figure
YES – Override previously created binder with the current definition.
NO – Keeps the previously created binder.
• SELECT BINDER PART
When more than one binder is available in the
database, the user can click the SELECT BINDER PART button to select a specific
binder from the SELECT BINDER dialog box as illustrated in Figure
Figure
Once the binder
is created, the user can edit binder using the editing functions as illustrated
in Figure
Figure
The editing functions are described as following:
• MOVE BINDER
This function allows the user to adjust relative
distance between the binder and the part. The relative distance will
affect the draw depth of the part. Click on the MOVE BINDER button to
display a dialog box as illustrated in Figure
The user can select the following methods to move the binder:
1. Select MOVE DIRECTION (U, V or W) and enter the translation distance in the input field of U, V and W. Click on the APPLY button to move the binder along the selected direction. The REVERSE OPERATION option is used to reverse the translation of binder.
2. Translate the binder by dragging
the SLIDER bar as illustrated in Figure
The total binder travel will be displayed in the input field of BINDER TRAVEL. The total binder travel is dynamically updated as the user moves the slider.
Figure
• ROTATE BINDER
This function allows the user to rotate the binder to an orientation relative to the part.
1.
Click on the ROTATE BINDER
button to display a dialog box as illustrated in Figure
Figure
2. After the center of rotation is defined, the user can select axis of rotation by toggle on one of the three toggle boxes for U, V and W. The angle of rotation is entered in the input field, following by clicking on the APPLY button to rotate the binder.
3. The user is given an option to rotate the binder by
moving the SLIDER bar to either left or right. Moving the slider to the left
will rotate the binder in clockwise direction, and vice versa. While moving the
slider, the user can observe the dynamic view of binder from the display area.
The amount of rotation angle is recorded on the box right below the SLIDER bar
as illustrated in Figure
4. The user can also create a LCS which U, V and W axes
are parallel to the X, Y, Z of global coordinate system.
Click on the CREATE button to display a dialog box as illustrated in Figure
5. Once the appropriate LSC is selected, the user can select the axis of rotation by toggle on U, V, or W. The angle of rotation is entered in the input field, following by clicking on the APPLY button to rotate the binder. The user can also rotate the binder by moving the slider bar to either left or right.
Figure
6. If the REVERSE OPERATION option is selected, and the binder will be rotated about the defined axis of rotation in the opposite direction after clicking the APPLY button.
7. Click on the OK button to dismiss the dialog box.
• MODIFY BINDER
This function provides the user with four options to change the binder shape by modifying one of two cross section lines which defines the binder shape.
1. Click on the MODIFY BINDER button, following by
selecting one of the section lines from the display area. Two cross section
lines which define the binder shape are illustrated in Figure
Figure
2. After a section line is selected, the CURVE EDIT dialog box is displayed. There are four option tabs available to the user for editing the section line.
1. SIMPLIFY
This function reduces the number of points of the
selected line. The dialog box is illustrated in Figure
Figure
TOL
The criteria used to simplify the curve. If the distance between two adjacent points is less than the defined tolerance, one of the points will be removed from the curve.
PREVIEW
This function displays the new section line after some points are removed.
RESELECT CURVE
This function enables the user to select the other section line.
APPLY
The function completes the operation.
OK
Accept the operation and dismiss the dialog box.
CANCEL
Abort the operation and dismiss the dialog box.
2. SMOOTH
This function enables the user to smooth the selected
section line. The dialog box is illustrated in Figure
Figure
AUTO SMOOTH
If this function is toggled ON, the program will automatically smooth the selected section line.
MANUAL SMOOTH
If this function is toggled on, the slider and SELECT
POINT button will be activated. The user can enter any value between 0 and
THROUGH FIXED POINTS
When this function is toggled ON, the SELECT POINT button will be activated. Click on the SELECT POINT button to highlight all the points on the selected curve. A new spline curve passing through the selected point(s) will be created.
STRAIGHT SEGMENT
This function enables user to smooth the curve through replacing the segment that user selected with straight line. If user toggles on this option, the Select Segment button is activated. User can click this button to select two points in curve. Click the Apply button after selected two points to change the curve to straight line.
3. MORPHING
This function allows the user to modify the section
line using four different morphing methods. Figure
Figure
Figure
NO CONSTRAINT
There is no constraint imposed on the section line
when it is morphed. The morphed shape will assume a natural spline curve. Refer to type 1 as illustrated in
Figure
KEEP C ANGLE
The tangent at the control point on the section line
is constrained. The morphed shape will maintain the original tangent
direction at the control point of the section line. Refer to type 2 as
illustrated in Figure
KEEP E ANGLE
The tangent at both end points on the section line is
constrained. The morphed shape will maintain the original tangent
direction at the end points of the section line. Refer to type 3 as
illustrated in Figure
KEEP CONVEX
Maintain the convex edge by changing the curvature of the section line.
Figure
4. EDIT
This function provides a method to edit the selected
section line by modifying the points on the line. As illustrated in Figure
Figure
ADD POINT
When this option is selected, the BY CURSOR LOCATION and BETWEEN TWO POINTS buttons are activated. The user may toggle on the BY CURSOR LOCATION button to add point on any location on the section line. Toggle on the BETWEEN TWO POINTS option, and click on the SELECT POINT button. eta/DYNAFORM displays existing points on the section line and request the user to select two adjacent points. After two adjacent points are selected, the POINT NUMBER input field is activated to allow the user to enter the number of points to be added between two selected points. If the second selected point is not adjacent to the first one, the following an error message is printed in the message prompt window:
INVALID POINT SELECT, REJECTED
MOVE CURVE
This function enables the user to move a selected section line. The binder surface will be moved along with the section line. Toggle the option on and the program will activate three data windows next to DX, XY and DZ. The user may enter any three displacement vectors with respect to the global X, Y and Z direction. Click APPLY button to move the section line and the binder.
MOVE POINT
This function allows the user to move a point on the section line in order to move the binder accordingly. If the option is selected, the SELECT POINT button and three input field next to DX, DY and DZ will be activated. The user may click on the SELECT POINT button to select a point on the section line, following by entering the displacement value with respect to the global X, Y and Z direction. Click on the APPLY button to move the points. The binder shape will be modified according to the new shape of the section line.
REMOVE POINT
This function enables the user to remove the control
points from the selected section line. If the option is selected, the SELECT
POINT button is activated to enable the user to select the point(s) on the
section line. Click on the middle mouse button to complete the point
selection. Refer to Figure
Figure
• MESH BINDER
This function is used to generate the binder mesh
using the binder surface. A dialog box as illustrated in Figure
Figure
eta/DYNAFORM calculates the default maximum and minimum element size of the mesh based on the shape and size of the binder surface. The user may enter the desirable value in the input fields. MAX SIZE controls the maximum element size of the mesh, while MIN SIZE controls the minimum element size of the mesh.
• CREATE
This function creates a binder surface and stores it in the part named C_BINDER.
NOTE: If there is an existing C_BINDER part in the current database, eta/DYNAFORM creates a part named BINDER01. Subsequently, if additional binders are created, BINDERn+1 will be created. eta/DYNAFORM recognizes the binder created from the binder menu.
• DELETE
Remove all binder surfaces and mesh from the database.
• EXIT
Close the BINDER dialog box.