ADDENDUM

 

This menu provides functions to create addendum from the master profile, edit and modify the addendum, etc.  The available functions in the ADDENDUM menu are shown in Figure 6.3.12.

 

 

Figure 6.3.12 Create and Edit Addendum

 

The following three options allow the user to control the update and display of the addendum and profile.  Each of the options can be selected individually any time during addendum generation.

 

AUTO UPDATE ADDENDUM (toggle)

 

If this option is toggled ON, the addendum will be automatically updated when the profile is modified.

 

ADDENDUM MESH (toggle)

 

If this option is toggled ON, the addendum mesh will be displayed.

 

PROFILE (toggle)

 

If this option is toggled ON, the profiles will be displayed.

 

 

6.3.3.1  ASSIGN

 

eta/DYNAFORM provides two methods to create the addendum.  If the BY SEGMENTS option is toggled ON, the user is can create the addendum by multiple segments with different master profiles.  If the BY SEGMENTS option is toggled OFF, the entire addendum will be created based on a master profile.

 

After the user selects a Master profile and clicks the ASSIGN button as in Figure 6.3.12, DYNAFORM opens a dialog window (Figure 6.3.13).

 

 

Figure 6.3.13 Insert Addendum

 

Select one of the options, OUTER, INNER or CORNER addendum, and click the APPLY button.

 

OUTER ADDENDUM (toggle on OUTER)

 

If BY SEGMENTS is toggled ON, the SELECT REGION button is activated.  Click SELECT REGION, and the program highlights the outer boundary of the part and prompts with the following message.

SELECT A NODE ON PART BOUNDARY AS STARTING POINT

 

After selecting a node on the part boundary, the program will prompt the user to select the end point of the region:

       SELECT A NODE ON PART BOUNDARY AS END POINT

 

After two nodes are selected on the outer boundary, click APPLY to create a partial addendum in the defined region.  Figure 6.3.14 illustrates a typical partial addendum.

 

If BY SEGMENT is toggled off, clicking the APPLY button will create the addendum around the entire outer boundary.  Figure 6.3.15 illustrates a typical complete addendum of a part.

Figure 6.3.14 Create Addendum by Segment

 

Figure 6.3.15 Complete Addendum by Master Profile

 

INNER ADDENDUM (toggle on INNER)

 

         The SELECT REGION button will be activated when the INNER option is toggled ON.

If BY SEGMENTS is toggled ON, click the SELECT REGION button to select two nodes on the same inner boundary.  Click APPLY to generate the partial addendum in the selected region.

If BY SEGMENTS is toggled OFF, click the SELECT REGION button to select a node on an inner boundary.

 

 

CORNER ADDENDUM (toggle on CORNER)

 

This function is used to connect a part with a flange and the addendum.  In this case, the flange may be part of the binder.  Refer to Figure 6.3.17 for a typical part with flange on the binder.

 

Follow these steps to create a corner addendum.

1.        When the CORNER option is selected, the dialog window in Figure 6.3.13 will change to Figure 6.3.16.

2.        Click the SELECT PROFILE button to select a profile on the addendum boundary. The selected profile will be highlighted as shown in Figure 6.3.18.

3.        Select two nodes on the part boundary as shown in Figure 6.3.19.  The program will prompt the user to confirm if the defined corner is correct.  Click YES to accept the defined corner region.

4.        The APPLY button in Figure 6.3.15 is activated. Click APPLY to generate the corner addendum as shown in Figure 6.3.20.

 

Figure 6.3.16 Corner Addendum

 

Figure 6.3.17 Flange on Binder Surface

 

 

Figure 6.3.18 Select End Profile on Addendum

 

   

 

Figure 6.3.19 Select Two Nodes on Part Boundary

 

Figure 6.3.20 Generated Corner Addendum

 

 

 

6.3.3.2  PATCH

 

This function is used to fill in a section of the addendum between two adjacent regions.  The filled part of the addendum is typically a transition area between two adjacent regions generated with different profile types.  Figure 6.3.21 shows typical addendum regions of different profile types.

 

Figure 6.3.21 Transition Area Between Adjacent Regions

 

Using this function, the program prompts the user to select two end profiles of adjacent regions.  After the profiles are selected, DYNAFORM will fill in the portion of the addendum between the selected profiles.  Figure 6.3.22 shows a typical transition area generated by the patch function.

 

6.3.3.3  DELETE

 

This function enables the user to delete the selected addendum.  The user selects an addendum from the ADDENDUM LIST window and clicks the DELETE button as shown in Figure 6.3.12.  The program will highlight the selected addendum and display a dialog window as shown in Figure 6.3.23 to prompt the user to confirm the deletion of the addendum.

 

 

Figure 3.3.23 Confirmation to Delete Addendum

 

Click YES to delete the selected addendum or NO to reject the selection.

 

 

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. Click one of the options and then the APPLY button, DYNAFORM will display a dialog window as in Figure 6.3.24.  The program will display the profiles in red and the POP LINE in blue as shown in Figure 6.3.25. The UPDATE ADDENDUM button is used to update the addendum after a morphing operation.

 

 

Figure 6.3.24 Morphing Addendum Options

 

 

 

Figure 6.3.25 Profiles and POP Line

 

POP LINE

 

This function allows the user to morph part of the POP LINE.  The program will prompt the user to select the starting profile and ending profile to define the region of the POP LINE to be morphed.  If there is more than one profile region defined in the addendum, the program will highlight the starting and ending profiles in each region with a circle at each profile.  After selecting two profiles, DYNAFORM will prompt the user to confirm the region and will highlight the POP LINE in the region as in Figure 6.3.26. The operation of morphing the POP LINE is the same as the LINE MORPHING function described in Section 6.4.1.  Figure 6.3.27 shows the morphed POP LINE and the related profiles.  After the POP LINE is morphed, click the CLOSE button to exit the dialog window.  The program will update the profiles and addendum according to the morphed POP LINE.  Figure 6.3.28 shows the updated addendum.

Figure 6.3.26 Selected POP Line for Morphing

 

 

Figure 6.3.27 Morphed POP Line and Profiles

 

 

Figure 6.3.28 Updated Addendum According to the Morphed POP Line

 

 

BAR HEIGHT

 

This function allows the user to morph the drawbar height of the profiles in the user-defined region.  The program will prompt the user to select the starting profile and ending profile to define the region.  The operation is similar to POP LINE morphing except that it morphs the control line on the top of the drawbar 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 program will prompt the user to select the starting and ending profiles to define the region.  This operation is similar to BAR HEIGHT line morphing except that it morphs the control line on the top of the drawbar 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 program will prompt the user to select the starting and ending profiles to define the region.  This operation is similar to POP LINE morphing except that it morphs the control line on the bottom of the counter bar 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 program will prompt the user to select the starting and ending profiles to define the region.  This operation is similar to POP LINE morphing except that it morphs the POP LINE 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 program will display a dialog window similar to Figure 6.3.24 and display the profiles and the POP LINE in the graphic display window as shown in Figure 6.3.25.

 

Select the SMOOTH option, click the APPLY button as in Figure 6.3.24, and the program will display a dialog window as shown in Figure 6.3.29.

 

 

Figure 6.3.29 Smooth Options

 

The smoothing operation of each option is similar to the morphing function except that the control line is smoothed instead of morphed.

 

The following example of smoothing the POP LINE demonstrates different smooth methods.

There are three methods to smooth the POP LINE.  Please refer to Section 6.2.1, EDIT BINDER, for a detailed description of smooth methods.

        

AUTO SMOOTH

 

         Smooths the entire POP LINE automatically.

 

         MANUAL SMOOTH

 

Smooths the entire POP LINE by moving the 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 shown in Figure 6.3.30.

 

 

Figure 6.3.30 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 the PREVIEW button to view the smoothed POP LINE.  If the smoothed shape is acceptable, click APPLY to accept the smoothed POP LINE.  Click OK to exit the SMOOTH dialog window.  Click the CLOSE button in the SMOOTH ADDENDUM dialog window to exit the menu.  The program will update the profiles and the addendum 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.  DYNAFORM will move the profiles 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 HEIGHTcontrol 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 6.3.31a illustrates the definition of a straight line to which the POP LINE can merge.  Figure 6.3.31b shows the result of the profiles after the POP LINE is merged to the selected line.  The program will update the addendum mesh after the MERGE ADDENDUM dialog window is closed.

 

 

Figure 6.3.31a   Merge POP Line                  Figure 6.3.31b Merge POP Line

 

 

6.3.3.7  MOVE

 

This function enables the user to move a region of addendum to another location.  If there are more than one addendum regions in the database, DYNAFORM will prompt the user to select a profile group:

         PICK A PROFILE GROUP

 

The program will highlight the profiles and addendum in the selected group as shown in Figure 6.3.32a. The program will then prompt the user to select a node on the part boundary as the starting point for moving the addendum.

         PICK NODE ON DIE BOUNDARY AS DESTINATION POSITION

  

 

Figure 6.3.32a Move Addendum                     Figure 6.3.32b Move Addendum

 

DYNAFORM will open a DYNAFORM QUESTION window to confirm the moved location and will highlight the new boundary on the part, Figure 6.3.32b.  If the location of the new boundary is not correct, select NO to put the new boundary on the opposite side of the reference point as shown in Figure 6.3.32c. Click YES to accept the boundary location.  The selected addendum will be moved as shown in Figure 6.3.32d.

 

Figure 6.3.32c Move Addendum                      Figure 6.3.32d 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 same as the MOVE function except 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 6.1.2, GEOMETRY TYPE, for the symmetry definition.

 

The mirror function of the program displays the symmetry axis. Select a region of addendum, and the program will display the mirrored boundary and prompt the user for acceptance as shown in Figure 6.3.33a.  Click YES to accept.  The mirrored result is shown in Figure 6.3.33b.

Figure 6.3.33a Mirror Addendum                      Figure 6.3.33b 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 prior to simulation.  

 

If the user selects this function, the program will prompt the user to select a profile. After selecting a profile, two section lines will be highlighted which are created from the plane of the profile intersecting with the binder and the die. See the Figure 6.3.34.

Figure 6.3.34 Select profile

 

Figure 6.3.35 Point Selection on Line

 

Then the program will prompt the user to select a reference point on the highlighted line or click the middle button to select the default point. If selecting a point on the highlighted line, see Figure 6.3.35. The lines will be divided into three lines identified 1, 2, 3 respectively and in the PROMPT MESSAGE window eta/DYNAFORM will give the result in the following format:

ELONGATION: 5.8%; LENGTH: 1: 434.1   2:521.7   3:207.7

ELONGATION means the elongation percentage of the specified section line after deformation. It can be calculated by:

ELONGATION = (LENGTH 1+ LENGTH 3 -LENGTH 2)/ LENGTH2 *100%

LENGTH 1 and LENGTH 3 are the lengths of the punch and addendum after deformation. LENGTH 2 means the length of the line 2 before deforming.

 

After the above response, the program will prompt the user to select another profile to continue. The user can go on or click the right mouse button to exit the function.

 

6.3.3.11  SPLIT

This function enables the user to divide a region of addendum into two independent regions. This function is useful for modifying the addendum locally without changing the shape of other addenda. If there is only one addendum region in the database, eta/DYNAFORM will prompt the user to select two different profiles to define the region to be split. If there is more than one addendum, the user needs to select only one profile in a region. The program will automatically split the region into two regions with the selected profile. After splitting, the program will add a new addendum name in the addendum window and add new a master profile type 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 the SHOW button, the different addendum will be identified with different ID numbers that will be displayed at the center of the addendum.

 

 

6.3.3.13  SYMMETRY

This function enables the user to adjust the orientation of the profile parallel to the symmetry plane. Before mirroring an addendum for a symmetric part, it is necessary to adjust the profiles whose boundary nodes are in the symmetry plane. If the user selects a profile with a boundary node in the symmetry plane, the program will change the orientation of the profile to the symmetry plane automatically and prompt the user to select other profiles.  Figure 6.3.36 shows the result of the profiles before and after adjusting the boundary profile.

 

 

Fig.6.3.36a Before Symmetry is Defined               Fig.6.3.36b After Symmetry is Defined

 

If the user selects profiles that have no boundary node in the symmetry plane, the program will open an eta/DYNAFORM QUESTION window to confirm this operation as show in Fig 6.3.37. Click YES to continue this operation. The program will change the orientation of the selected profile to be parallel to the symmetry plane. Click NO to cancel this operation and select another profile.

 

Figure 6.3.37 eta/DYNAFORM Question Window

 

 

6.3.3.14  UPDATE ADDENDUM

 

If the AUTO UPDATE ADDENDUM option is not selected, DYNAFORM will not update the addendum after the user modifies the profiles.  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 will not be necessary.