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 window is shown in Figure
Figure
BINDER MARGIN and BINDER SHIFT parameters are used to control the binder size and position relative to the part.
l BINDER MARGIN
BINDER MARGIN allows the user to expand the binder. The value of the BINDER MARGIN is the distance between the boundary of the original binder and the expanded binder.
l BINDER SHIFT
BINDER SHIFT is used to adjust the vertical distance between the part and the binder. If the value of the BINDER SHIFT is positive, the binder will be shifted along the -Z axis. A negative value will shift the binder along the +Z axis. BINDER SHIFT directly affects the draw depth of a part.
l DEFINE BINDER ORIENTATION
DEFINE BINDER ORIENTATION controls the U-V direction of the binder surface. TRIM REFERENCE LINE adjusts the length of the REFERENCE LINE, which controls the binder shape.
When the button
is clicked, the program displays the part in the X-Y view. The program
will highlight the POINT OF FIRST CONTACT with a white circle and prompt:
CLICK AND HOLD THE LEFT MOUSE BUTTON AT THE
MOVE THE MOUSE TO ROTATE. RELEASE THE MOUSE BUTTON WHEN DONE
The program
draws two orthogonal cross lines on the binder as shown in Figure
l TRIM REFERENCE LINE
The shape of
the binder is determined by the following factors: the reference point, the
orientation of the U-V axes, the length of the U-V axes, and the part
geometry. If some of the details on the part are not acceptable for
the binder shape, the user can trim the reference line to adjust the curvature
of the binder. Refer to Figure
Figure
Figure
To create a binder follows these steps:
1. Enter the desired BINDER MARGIN and BINDER SHIFT.
2. Define the proper orientation of the U-V direction for the binder surface.
3. Adjust the binder shape by using the TRIM REFERENCE LINE function.
4. Click the CREATE button at the bottom of the window. The program will create the binder surface and put it in a new part called C_BINDER that will be automatically assigned to TOOL (binder). Refer to Section 9.1 for a detailed explanation on the TOOL part.
5.
If a binder has already been created in the C_BINDER
part, DYNAFORM will display a QUESTION WINDOW as in Figure
Figure
YES - Recreates the binder with the current definition.
NO - Keeps the old binder.
l SELECT BINDER PART
When there is
more than one binder in the database and the user wants to modify a specific
binder, the user can click the SELECT BINDER PART button and the SELECT BINDER
window as shown in Figure
Figure
Once one binder is created, the editing
functions are activated for the user. The editing functions are used to modify
the binder as shown in the lower part of Figure
Figure
The description for each editing function follows:
l MOVE BINDER
This function
allows the user to adjust the relative distance between the binder and the
part. The relative distance will affect the draw depth of the part.
Click the MOVE BINDER button, and the program will display a dialog window as
shown in Figure
There are two methods to move the binder.
1. Select MOVE DIRECTION U, V or W and enter the vector distance to be moved directly in the data window. The value in the data window is the translation distance of the binder. Click APPLY once and the binder will be moved along the selected direction with the defined distance. Toggle on the REVERSE OPERATION option and the binder will be moved in the opposite direction by clicking APPLY.
2. The SLIDER can also be used to translate the binder. Move the slider to the right, and the binder will be moved in the positive direction along the selected axis. Move the slider to the left and the binder will be moved in the opposite direction. Click APPLY to accept the new binder position.
The total binder movement will be displayed in the data window below the slider. The program will display the binder in the new position as the user moves the slider.
Figure
l ROTATE BINDER
This function allows the user to rotate the binder to a desirable orientation relative to the part.
1.
Click the ROTATE BINDER button, and the program will
display a dialog window as in Figure
Figure
2.
After defining the origin, the LCS is created with U, V
and W parallel to the global coordinates. The program will display a dialog
window as in Figure
Figure
3. Once the LSC is defined, the user has a choice of either rotating the binder by the defined rotational angle or using the slider to rotate the binder in dynamic mode. To define the rotation, the user may select the U, V or W axis and enter the rotational angle in the data window next to the axis. Click APPLY once, and the binder will rotate counter clockwise about the selected axis of the LCS with the defined angle. Click OK to exit the function.
4. Toggle ON the REVERSE OPERATION option, and the binder will rotate about the defined axis of the LCS in the opposite of the selected direction when the APPLY button is clicked. To use the slider, the user selects the U, V or W axis and moves the slider to rotate the binder. Move the slider to the right to rotate the binder in a counter clockwise direction about the selected axis. Move the slider to the left to rotate in the opposite direction. The program shows the new binder position as the user moves the slider.
5. Click APPLY to accept the new binder position. The program displays the total rotational angle about the selected axis in the data window below the slider.
l MODIFY BINDER
This function provides the user with four options to edit the binder by modifying one of two cross section lines on the binder.
1. Click the MODIFY BINDER button, and the program displays the SELECT LINE window and prompts: SELECT ONE LINE TO EDIT. Two cross section lines are displayed as shown in Figure 6.2.112.
Figure
2. After selecting a section line, the program displays a CURVE EDIT window. There are four option tabs available to the user.
1. SIMPLIFY
This function
simplifies the selected curve by reducing the number of points in the line.
Refer to Figure
TOL
These are the criteria used to simplify the curve. If the distance
between two adjacent points is less than the defined criteria, one of the
points will be removed from the curve
PREVIEW
This function shows the new section line after some points are removed
RESELECT CURVE
This function enables the user to select the other section line to be
simplified.
APPLY
Accepts the simplified curve without exiting the function.
OK
Accepts the simplified curve and exits the function.
CANCEL
Discards the simplified result and exits the function.
Figure
2. SMOOTH
This function enables the user to smooth the selected section line. There are
three methods to smooth the section line; refer to 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
the SELECT POINT button, and the program will highlight all the points
on the selected curve. A new spline curve will be created passing through
the selected point(s).
Figure
3. MORPHING
This function allows the user to modify the section line by morphing.
There are four methods available in the MORPHING function. 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
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
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
KEEP CONVEX
Maintains the convex edge by changing the curvature of the section line.
Figure
Figure
4. EDIT
This function provides a method to edit the section line by editing the points
on the selected line. Figure
ADD POINT
When this option is toggled ON, the BY CURSOR LOCATION and BETWEEN TWO
POINTS buttons are activated. The user may toggle on the BY CURSOR LOCATION
button to pick any location on the section line to add a point. Toggle on the
BETWEEN TWO POINTS option, and click the SELECT POINT button.
The program will display points on the section line and prompt the user to
select two adjacent points. After two adjacent points are selected, the program
will activate the POINT NUMBER field for 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 program will issue an error message:
INVALID POINT SELECT, REJECTED.
MOVE CURVE
This function enables the user to move a selected section line. The binder
surface will be moved 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 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. Toggle the option on and the SELECT POINT button and
three data windows next to DX, DY and DZ will be activated. The user may click
SELECT POINT to select a point on the section line, enter the displacement
value with respect to the global X, Y and Z direction, and click APPLY to move
the section point. 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. Toggle the option on, and the SELECT POINT button is activated
for the user to select the point(s) on the section line. Click the MIDDLE MOUSE
BUTTON to complete the point selection. Refer to Figure
Figure
Figure
l MESH BINDER
This function
is used to generate the binder mesh from the binder surface. DYNAFORM displays
a dialog window as shown in Figure
Figure
The program 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 data windows. MAX SIZE controls the maximum element size of the mesh. MIN SIZE controls the minimum element size of the mesh.
l CREATE
This function creates a binder surface and adds it to the part called C_BINDER.
Note: If there is a part called C_BINDER in the current database, eta/DYNAFORM will create a part called BINDER01. Subsequently, if additional binders are created, BINDERn+1 will be created. eta/DYNAFORM will recognize the binder created from the binder menu.
l DELETE
Deletes surface and mesh in the binder from the database.
l EXIT
Closes the BINDER DIALOGUE WINDOW.