OUTER SMOOTH
The functions provided in the OUTER SMOOTH dialog box are used to smooth the outer boundary of the selected part. As illustrated in Figure 6.1.34, there are four functions in the dialog box (ROLLER, MORPHING, CORNER SMOOTH, EXPAND).
Figure 6.1.34 Outer Smooth dialog box
6.1.11.1 ROLLER
This function allows the user to roll a cylinder with a defined radius along the boundary and fill the gaps between the part boundary and the cylinder. Once this function is selected, a dialog box as illustrated in Figure 6.1.35 is displayed. The default radius of the cylinder is 300 (mm) in the ROLL RADIUS input field.
Figure 6.1.35 Roller dialog box
1. After the desired radius is entered, click on the CREATE BOUNDARY button to show the new boundary line with the cylinder rolled along the part boundary. If the result is acceptable, click on the FILL BOUNDARY button to fill the gap with elements and new surface. A new part will be created to include the elements and surfaces. The part will be automatically assigned as the DIE.
2. The UNDO function is used to remove the filled mesh in the gap and allow the user to go back to the original part. Figure 6.1.36 illustrates the result of a typical roller operation.
Figure 6.1.36 An illustration of a roller operation
3. Click on the CLOSE button to exit the function.
The LOCAL option allows the user to roll a cylinder with a defined radius along a selected boundary. eta/DYNAFORM will fill the gap between the part boundary and the cylinder surface to smooth the local boundary.
Click on the ROLLER button and select the LOCAL option. The default radius of the cylinder is set to 300 (mm) in the ROLL RADIUS input field. The user can input any desired PART NAME and ROLL RADIUS.
Fig. 6.1.37 An illustration of Outer Smooth/Roller using Local option
6.1.11.2 MORPHING
This function allows the user to locally modify the part mesh by morphing the boundary line of the part. Figure 6.1.38 illustrates dialog box of the MORPHING function.
Figure 6.1.38 Morphing dialog box
1. Click on the MORPHING BOUNDARY button to highlight the boundary of die. Eta.DYNAFORM requests the user to select two points on the part boundary to define a morphing region. Figure 6.1.39 illustrates the selected region on the part boundary for morphing operation.
Figure 6.1.39 Select Morphing Boundary
2. After two points are selected, the CURVE EDIT dialog box as illustrated in Figure 6.1.40 is displayed. There are several options to allow the user to morph and smooth the boundary line.
Figure 6.1.40 Curve Edit dialog box
About the detailed description of Curve Edit function, user can refer to the Section 6.2.1.
3. Click on the FILL BOUNDARY button to fill elements between the original boundary and the smoothed boundary. The result from a typical morphing operation is illustrated in Figure 6.1.41.
Figure 6.1.41 Morphing Result
4. The UNDO button is used to remove the elements from the gap, allowing the user to return to the original boundary and keep the newly created part in IGS_SMH. PART NAME enables the user to assign a name to the part; it will be automatically assigned as TOOL.
5. Click on the CLOSE button to exit the function .
6.1.11.3 CORNER SMOOTH
This function allows the user to smooth sharp corners on a part using a defined radius. eta/DYNAFORM will generate a set of elements in circular shape with the defined radius around the selected point.
When this function is selected, the dialog box as illustrated in Figure 6.1.42 is displayed. The default corner radius is 30 (mm) as displayed in the input field of CORNER RADIUS.
Figure 6.1.42 Corner Smooth dialog box
1. After entering the desired corner radius, click on the CORNER SMOOTH button to highlight the boundary line of the part such as illustrated in Figure 6.1.43.
Figure 6.1.43 Sharp Corner
2. The user selects a node on the boundary for the corner smooth operation.
3. After a node is selected at a sharp corner, eta/DYNAFORM will generate a set of elements around the part boundary to create a circular shape to smooth the edge. Figure 6.1.44 illustrates a typical result of a corner smooth operation.
Figure 6.1.44 Corner Smooth
4. The UNDO button is used to remove the elements from the smoothed corner and allowing the user to obtain the original boundary.
5. Click on the CLOSE button to exit the function.
6.1.11.4 EXPAND
The EXPAND function is used to extend the part boundary with elements. When this function is selected, dialog box as illustrated in Figure 6.1.45 is displayed. The value in the input field of EXTENSION is the default extension value for the active part. The user can type in any positive value.
Figure 6.1.45 Boundary Expand dialog box
1. Click on the BOUNDARY EXPAND button to highlight the boundary of extension as illustrated in Figure 6.1.46a. The default extension value is calculated from the average element size. The user can input other value following by clicking the BOUNDARY EXPAND button once again to modify the default value.
2. Select the MORPH BOUNDARY button to morph the boundary line. Refer to Section 6.5.1 LINE MORPHING for description of this function.
3. The FLATTEN BOUNDARY SEGMENT function allows the user to flatten line segment between two selected points on the boundary line.
a) Extended boundary b) Filling extended boundary
Figure 6.1.46 An illustration of the Boundary Expand operation
4. When the morphed boundary is accepted, click on the FILL BOUNDARY button to generate the mesh between the original boundary and the extension boundary. An illustration of extended boundary with filled elements is illustrated in Figure 6.1.46b.
5. The SMOOTH CORNER function allows the user to smooth a selected a sharp corner.
NOTE: A sharp angle is determined by two adjacent boundary elements when the angle between two boundary edges is greater than 30º.
6. Click on the UNDO button to remove the generated mesh and exit the function.