ADDENDUM
This menu provides
functions to create, edit and modify the addendum,
etc. The functions provided in the ADDENDUM menu are illustrated in
Figure
Figure
The following three options allow the user to control the update and display of the addendum and profile. Each of these options can be selected individually any time during process of creating addendum.
AUTO UPDATE ADDENDUM (toggle)
If checkbox of this option is toggled on, the addendum is automatically updated after the profile is modified.
ADDENDUM MESH (toggle)
If checkbox of this option is toggled on, the addendum mesh is displayed.
PROFILE (toggle)
If checkbox of this option is toggled on, the profiles are displayed.
eta/DYNAFORM provides two methods to create the addendum. If checkbox of the BY SEGMENTS option is toggled on, the user is can create the addendum by multiple segments using different master profiles. If the checkbox toggled off, the entire addendum will be created based on a single master profile.
After selecting a master profile, the user
clicks on the ASSIGN button to display the dialog box as illustrated in Figure
Figure
Select one of the types, OUTER, INNER or CORNER addendum, and click on the APPLY button to insert the addendum.
OUTER ADDENDUM (toggle on OUTER)
If checkbox of the BY SEGMENTS is toggled on, the SELECT REGION button is enabled. Click on the button to highlight the outer boundary of the part. The following message is printed in the message prompt window:
SELECT A NODE ON PART BOUNDARY AS STARTING POINT
After selecting a node on the part boundary, the following message is printed in the message prompt window:
SELECT A NODE ON PART BOUNDARY AS END POINT
After two nodes are selected on the outer
boundary, click on the APPLY button to create an addendum segment in the
defined region. Figure
If checkbox of the BY SEGMENT is toggled off,
the SELECT REGION button is disabled. The user clicks on the APPLY button to create
addendum around the entire outer boundary. Figure
Figure
Figure
INNER ADDENDUM (toggle on INNER)
The SELECT REGION button is enabled if the INNER option is toggled on.
If checkbox of the BY SEGMENTS is toggled on, the user clicks on the SELECT REGION button to select two nodes on the same inner boundary. The user clicks on the APPLY button to generate addendum segment in the selected region.
If checkbox of the BY SEGMENTS is toggled off, the user clicks on the SELECT REGION button to select a node on an inner boundary.
CORNER ADDENDUM (toggle on CORNER)
This function is used to create addendum connecting
a part with a flange and the neighboring addenda. In this case, the
flange may be part of the binder. Refer to Figure
The steps listed below are used to create a corner addendum:
1. When the CORNER option is selected, the SELECT BOUNDARY button as
illustrated in Figure
2. Click the SELECT PROFILE button to select a profile on the addendum
boundary. The selected profile will be highlighted as illustrated in Figure
3. Select two nodes on the part boundary as illustrated in Figure
4. Click on the APPLY button to generate the corner addendum as illustrated
in Figure
Figure
Figure
Figure
Figure
Figure
This function is used to fill an
addendum segment between two adjacent addenda. The filled segment is
typically a transition area between two adjacent addenda generated using
different profile types. Figure
Figure
The user need to select two end profiles
of adjacent addenda after clicking on the PATCH button. After the
profiles are selected, the segment is created. Figure
Figure
This function
enables the user to remove the selected addendum from database. The user
selects an addendum from the ADDENDUM LIST and clicks on the DELETE button as
illustrated in Figure
Figure
Click on the YES button to confirm removal of the selected addendum. If NO is selected, the operation is aborted.
This function
enables the user to modify a segment of addendum by morphing the POP LINE, BAR
HEIGHT, BAR WIDTH, CBAR HEIGHT and WALL ANGLE. The MORPH ADDENDUM dialog box is
illustrated Figure
Figure
Figure
POP LINE
This function allows the user to morph selected region
of the POP LINE. The user needs to select the starting and ending profile
to define the region which is subjected morphing. If more than one region
is defined in the addendum, the starting and ending profiles in each region is
highlighted with a circle at each profile. After selecting two profiles,
the user needs to confirm the selection in order to highlight the POP LINE as
illustrated Figure
Figure
Figure
Figure
Figure
BAR HEIGHT
This function allows the user to morph drawbar height of the profiles in the user-defined region. The user selects the starting and ending profile to define the region. The operation is similar to the POP LINE morphing operation, with an exception that the control line on top of the drawbar is morphed to alter the drawbar height of the profiles.
BAR WIDTH
This function allows the user to morph the drawbar width of the profiles in the user-defined region. The user selects the starting and ending profiles to define the region. This operation is similar to the BAR HEIGHT line morphing operation with an exception that the control line on top of the drawbar is morphed to alter the drawbar width of the profiles.
CBAR HEIGHT
This function allows the user to morph the counter bar height of the profiles in the user-defined region. The user selects the starting and ending profiles to define the region. This operation is similar to the POP LINE morphing operation with an exception that the control line on the bottom of the counter bar is morphed to alter the counter bar height of the profiles.
WALL ANGLE
This function allows the user to morph the wall angle of the profiles in the user-defined region. The user selects the starting and ending profiles to define the region. This operation is similar to the POP LINE morphing operation with an exception that the POP LINE is morphed to alter the wall angle of the profiles.
This function enables the user to modify a segment of addendum by
smoothing the POP LINE, BAR HEIGHT, BAR WIDTH, CBAR HEIGHT and WALL ANGLE. The
user selects the SMOOTH function to display a dialog box as illustrated in
Figure
Figure
The options for smoothing operation are quite similar to the morphing function described in previous section. Instead of morphing, the user smoothes the control line.
The following example demonstrates different smooth methods used to smooth the POP LINE.
The POP LINE can be smoothed using one of the three options
described below. Please refer to Section
AUTO SMOOTH
Automatically smooth the entire POP LINE.
MANUAL SMOOTH
Entire POP LINE is smoothed according to the
movement of slider. The SELECT FIXED POINTS option enables the user to
select more than one fixed point. These selected points will not be moved
during the smooth operation. A typical result of manual smoothing with
fixed points is illustrated in Figure
Figure
THROUGH FIXED POINTS
This function allows the user to smooth a segment of the POP LINE by selecting a number of fixed points on the POP LINE. Click on the PREVIEW button to view the smoothed POP LINE. If the smoothed shape is acceptable, clicks on the APPLY to accept the smoothed POP LINE. Click OK to exit the SMOOTH dialog box. Click on the CLOSE button in the SMOOTH ADDENDUM dialog box to exit the menu. The profiles and the addendum are automatically updated according to the smoothed POP LINE.
This function enables the user to merge (or map) the control line of the POP LINE, BAR HEIGHT, BAR WIDTH, CBAR HEIGHT and WALL ANGLE to a selected line. The profiles are repositioned according to the distance from the control line to the selected line.
POP LINE
Modifies profiles according to the merged POP LINE.
BAR HEIGHT
Modifies profiles according to the merged BAR HEIGHT control line.
BAR WIDTH
Modifies profiles according to the merged BAR WIDTH control line.
CBAR HEIGHT
Modifies profiles according to the merged CBAR HEIGHT control line.
WALL ANGLE
Modifies profiles according to the merged WALL ANGLE control line.
Figure
Figure
This function enables the user to move a selected addendum segment to another location. If more than one addendum segment are available in the database, the following message is printed in message prompt window:
PICK A PROFILE GROUP
After the user
selected a group of profile, eta/DYNAFORM highlights the profiles and addendum
of the selected group such as illustrated in Figure
PICK NODE ON DIE BOUNDARY AS DESTINATION POSITION
Figure
A DYNAFORM
QUESTION dialog box is displayed requesting the user to confirm the selected
location. The new boundary on the part is highlighted, as illustrated in Figure
Figure
This function copies the selected profiles and addendum to another location on the part boundary. The operation procedure is similar to the MOVE function with an exception that the original addendum is kept in the database.
This function
generates the entire addendum defined for half symmetry by mirroring it about
the symmetry plane. The user must define the symmetry axis for the part in the
DFE/PREPARATION menu in order to use this function. Refer to Section
The symmetry axis is
displayed after the mirror function is selected. The user selects an addendum
segment to display the mirrored boundary. From the displayed DYNAFORM QUESTION
dialog box as illustrated in Figure
Figure
NOTE: If the generated addendum by the MOVE, COPY or MIRROR functions interferes with existing addendum, the operation will be aborted.
This function is used to estimate the elongation ratio of the blank along the specified profile direction. It is useful for estimating the level of blank deformation.
If this function
is selected, the user needs to select a profile. After selecting a profile, two
section lines are highlighted as illustrated in Figure
Figure
Figure
Next, the user
selects a reference point on the highlighted line or clicks the middle button
to select the default point. As illustrated in Figure
ELONGATION: 5.8%; LENGTH: 1: 434.1 2:521.7 3:207.7
ELONGATION is the elongation percentage of the specified section line after deformation. It is calculated by the following equation:
ELONGATION = (LENGTH 1+ LENGTH 3 -LENGTH 2)/ LENGTH2 *100%
LENGTH 1 and LENGTH 3 indicate the lengths of the punch and addendum after deformation, respectively. LENGTH 2 indicates the length of the line 2 prior to deformation.
Then, the user continues by selecting another profile or click on the right mouse button to exit the function.
This function enables the user to divide an addendum segment into two independent segments. This function is useful for locally modifying the addendum without changing the shape of other addenda. If only one addendum segment is available in the database, the user can select two different profiles to define the split region. If there is more than one addendum, the user needs to select only one profile in a region. The region is automatically split into two regions with the selected profile. After splitting, a new addendum name is listed in the addendum list, while a master profile type is listed in the master profiles list.
This function helps the user to identify the addendum type with ID number. If the user clicks on the SHOW button, addenda are identified with different ID numbers displayed at the center of each addendum.
This function enables the user to
adjust orientation of the profile parallel to the symmetry plane. Prior to
mirroring an addendum of a symmetric part, it is necessary to adjust the
profiles whose boundary nodes fall in the symmetry plane. If the user selects a
profile with a boundary node falls in the symmetry plane, eta/DYNAFORM will
automatically change the orientation of the profile to the symmetry plane and
requests the user to select other profiles. Figure
Fig.6.
If the user selects profiles that
have no boundary node in the symmetry plane, a DYNAFORM QUESTION dialog box as
illustrated in Figure
Figure
If the AUTO UPDATE ADDENDUM option is not selected, eta/DYNAFORM will not update the addendum after the profiles are modified. This function allows the user to update the addendum mesh according to the modified profiles. If the AUTO UPDATE ADDENDUM option is selected, this function is not needed.