Modeling with advanced techniques > Sheet parts > Change a bend
  
Change a bend
In general, Creo Elements/Direct Modeling allows you to change the angles, radii, or lengths of bends, as well as the K factor.
To modify a bend's parameters,
1. Activate the Basic Sheets module:
a. Click File > Modules. The Modules dialog box opens.
b. Click Modules.
c. Click Basic Sheets under Free.
2. Click Sheets and then, in the Modify Sheet group, click the arrow next to Bend.
3. Click Modify. The Modify Bends dialog box opens.
4. Click a bend of your sheet metal part. Creo Elements/Direct Modeling highlights the bend you have clicked and displays the current values of the bend under Old Parameters.
5. Specify a face of the sheet (the Anchor) that is to be held while the other part of the sheet is folded.
6. Depending on where you want the bend to start, click Centered on or off. The default is not centered.
7. Select the bend parameter that should "float" with respect to the other two parameters. The floating parameter can be the angle (Ang), inner radius (Rad), or length (Len) of the bend.
8. Enter a new bend Angle, Inner Rad, or Length in the relevant fields under New Parameters.
9. If necessary, enter a new K Factor.
10. If necessary, click Reverse to reverse the bend direction.
11. Click Next to retain the bend attribute settings in the menu and continue bending parts.
12. Click Preview to preview the bend or click to complete the operation.
The anchored face, the bend allowance change, and the centered option
The following figure shows how the bend is modified when L1 is the anchored side and when L2 is the anchored side (Centered is off). When L1 is the anchored face, the Bend Allowance Change (C) is adjacent to L2. When L2 is the anchored face, the Bend Allowance Change (C) is adjacent to L1.
1. Original bend (B = Bend Allowance length).
2. 2A & 2B: L1 is anchored.
3. 3A & 3B: L2 is anchored.
When Centered is on, the bend allowance change is distributed equally on both sides of the bend.