ADDENDUM

 

This menu provides functions to create, edit and modify the addendum, etc.  The functions provided in the ADDENDUM menu are illustrated in Figure 6.3.13.

 

Figure 6.3.13 Create and Edit Addendum

 

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.

 

 

6.3.3.1  ASSIGN

 

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 6.3.14.

Figure 6.3.14 Insert Addendum dialog box

 

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 6.3.15 illustrates a typical addendum segment.

 

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 6.3.16 illustrates a typical addendum around the entire out boundary of a part.

Figure 6.3.15 Create Addendum by Segment

Figure 6.3.16 Complete Addendum by Master Profile

 

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 6.3.18 for illustration of a typical part with flange on the binder.

 

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 6.3.17 is enabled.

 

2.        Click the SELECT PROFILE button to select a profile on the addendum boundary. The selected profile will be highlighted as illustrated in Figure 6.3.19.

 

3.        Select two nodes on the part boundary as illustrated in Figure 6.3.20. Click on the YES button to accept the defined corner region.

 

4.        Click on the APPLY button to generate the corner addendum as illustrated in Figure 6.3.20.

 

Figure 6.3.17 Corner Addendum

Figure 6.3.18 Flange on Binder Surface

 

Figure 6.3.19 Select End Profile on Addendum

 

Figure 6.3.20 Select Two Nodes on Part Boundary

Figure 6.3.21 Generated Corner Addendum

 

6.3.3.2  PATCH

 

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 6.3.22 illustrates a typical addendum region of different profile types.

 

Figure 6.3.22 Transition Area between Adjacent Regions

 

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 6.3.23 illustrates a typical transition area generated by the patch function.

 

Figure 6.3.23 Typical Result of Patch Function

 

6.3.3.3  DELETE

 

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 6.3.13eta/DYNAFORM highlights the selected addendum and displays a dialog box as illustrated in Figure 6.3.24.

Figure 6.3.24 Dynaform Question dialog box

Click on the YES button to confirm removal of the selected addendum. If NO is selected, the operation is aborted.

 

 

6.3.3.4  MORPHING

 

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 6.3.25.  As illustrated in Figure 6.3.26, eta/DYNAFORM displays the profiles and POP LINE in red and blue, respectively. The UPDATE ADDENDUM function is used to update the addendum after a completion of morphing operation.

Figure 6.3.25 Morphing Addendum dialog box

 

 

Figure 6.3.26 Profiles and POP Line

 

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 6.3.27. The morphing operation of POP LINE is similar to the LINE MORPHING function. 

Figure 6.3.27 Selected POP Line for Morphing

 

Figure 6.3.28 illustrates the morphed POP LINE and the related profiles.  After the POP LINE is morphed, the user can click on the CLOSE button to dismiss the dialog box.  The profiles and addendum are updated according to the morphed POP LINE.  Figure 6.3.29 illustrated the updated addendum after the POP LINE is morphed.

 

Figure 6.3.28 Morphed POP Line and Profiles

 

 

Figure 6.3.29 Updated Addendum According to the Morphed POP Line

 

 

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.

 

 

6.3.3.5  SMOOTH

 

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 6.3.30.

 

Figure 6.3.30 Smooth dialog box

 

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 6.2.1 for a detailed description of methods used for smoothing.

 

 

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 6.3.31.

Figure 6.3.31 Manual Smooth With Fixed Point

 

 

         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. 

 

 

6.3.3.6  MERGE

 

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 6.3.32a illustrates the definition of a straight line for MERGE POP LINE operation.  Figure 6.3.32b illustrates the result of the profiles after the POP LINE is merged to the selected line.  The addendum mesh is automatically updated after the MERGE ADDENDUM dialog box is closed.

 

Figure 6.3.32a   Merge POP Line              Figure 6.3.32b Merge POP Line

 

 

 

6.3.3.7  MOVE

 

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 6.3.33a. The following message is then printed in the message prompt window.

 

PICK NODE ON DIE BOUNDARY AS DESTINATION POSITION

 

  

 

Figure 6.3.33a Move Addendum                     Figure 6.3.33b Move Addendum

 

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 6.3.33b.  If the location of the new boundary is wrong, the user can select NO to put the new boundary on the opposite side of the reference point as illustrated in Figure 6.3.33c. Click on the YES button to accept the boundary location.  The selected addendum will be moved to the location as illustrated in Figure 6.3.33d.

 

Figure 6.3.33c Move Addendum                      Figure 6.3.33d Move Addendum

 

6.3.3.8  COPY

 

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.

 

6.3.3.9  MIRROR

 

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 6.1.5 for information about the symmetry definition.

 

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 6.3.34a, the user selects YES to mirror the addendum.  The mirrored result is illustrated in Figure 6.3.34b.

Figure 6.3.34a Mirror Addendum                      Figure 6.3.34b Mirror Addendum

 

NOTE: If the generated addendum by the MOVE, COPY or MIRROR functions interferes with existing addendum, the operation will be aborted.

 

6.3.3.10  ELONGATE

 

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 6.3.35. These section lines are created from the plane of the profile intersecting with the binder and the die.

Figure 6.3.35 Select profile

 

Figure 6.3.36 Point Selection on Line

 

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 6.3.36, the lines are divided into three lines identified as 1, 2, 3 respectively. The result is printed in the message prompt window:

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.

 

6.3.3.11  SPLIT

 

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.

 

 

6.3.3.12  SHOW

 

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.

 

6.3.3.13  SYMMETRY

 

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 6.3.37 illustrates the result of the profiles before and after adjusting the boundary profile.

 

 

Fig.6.3.367a Before Symmetry is Defined               Fig.6.3.37b After Symmetry is Defined

 

If the user selects profiles that have no boundary node in the symmetry plane, a DYNAFORM QUESTION dialog box as illustrated in Figure 6.3.38 is displayed. The user clicks on YES button to continue the operation. Eta/DYNAFORM changes the orientation of the selected profile to be parallel to the symmetry plane. The user can click NO to cancel this operation and continues to select another profile.

Figure 6.3.38 eta/DYNAFORM Question dialog box

 

 

 

6.3.3.14  UPDATE ADDENDUM

 

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.