GuiCommand: Name: SheetMetal AddCornerRelief MenuLocation: SheetMetal , Add Corner Relief Workbenches: SheetMetal_Workbench Shortcut: C R
SheetMetal AddCornerRelief
Description
The SheetMetal AddCornerRelief command adds a corner relief. A relief is usually created at corners where two bends meet, but the command can also create a relief at an open corner.
The command can only create one relief at a time.
![](https://raw.githubusercontent.com/FreeCAD/FreeCAD-documentation/master/wiki/images/SheetMetal_AddCornerRelief-01.png)
![](https://raw.githubusercontent.com/FreeCAD/FreeCAD-documentation/master/wiki/images/SheetMetal_AddCornerRelief-02.png)
![](https://raw.githubusercontent.com/FreeCAD/FreeCAD-documentation/master/wiki/images/SheetMetal_AddCornerRelief-03.png)
![](https://raw.githubusercontent.com/FreeCAD/FreeCAD-documentation/master/wiki/images/SheetMetal_AddCornerRelief-04.png)
Usage
- Select two edges of a corner.
- There are several ways to invoke the command:
- Press the
Add Corner Relief button.
- Select the SheetMetal →
Add Corner Relief option from the menu.
- Right-click in the Tree view or the 3D view and select the Sheet Metal →
Add Corner Relief option from the context menu.
- Use the keyboard shortcut: C then R.
- Press the
- The Generate Sheet Metal base shape Task panel opens (introduced in version 0.5.00).
- Optionally press the Select button to reselect the edges.
- Press the Preview button to finish the selection and display the changes.
- Optionally adjust the parameters in the Task panel.
- Press the OK button to finish the command and close the Task panel.
- A CornerRelief object will be created consisting of one new corner relief at the selected corner.
- Optionally adjust the parameters in the Property editor.
Relief shapes
The shape of a corner relief can be altered by changing its property values:
The value of the property ReliefSketch can be chosen from a list: {{value|Circle}} (default), {{value|Circle-Scaled}}, {{value|Square}}, {{value|Square-Scaled}}, {{value|Sketch}}.
-
{{value|Circle}}and {{value|Square}} use the value of the property Size to scale the relief.
-
{{value|Circle-Scaled}}and {{value|Square-Scaled}} use the value of the property Size Ratio to scale the relief.
-
{{value|Sketch}}activates the use of the sketch listed in the property Sketch to define the relief shape.
![](https://raw.githubusercontent.com/FreeCAD/FreeCAD-documentation/master/wiki/images/SheetMetal_AddCornerRelief-05.png)
![](https://raw.githubusercontent.com/FreeCAD/FreeCAD-documentation/master/wiki/images/SheetMetal_AddCornerRelief-06.png)
![](https://raw.githubusercontent.com/FreeCAD/FreeCAD-documentation/master/wiki/images/SheetMetal_AddCornerRelief-07.png)
A closer look at relief sizes
To get an idea how and where the relief is placed we unfold a default corner without a relief.
![](https://raw.githubusercontent.com/FreeCAD/FreeCAD-documentation/master/wiki/images/SheetMetal_AddCornerRelief-08.png)
![](https://raw.githubusercontent.com/FreeCAD/FreeCAD-documentation/master/wiki/images/SheetMetal_AddCornerRelief-09.png)
![](https://raw.githubusercontent.com/FreeCAD/FreeCAD-documentation/master/wiki/images/SheetMetal_AddCornerRelief-10.png)
Default corner of two bends → Corner with unfold solid → Corner in top view
The next step is to open the unfold sketch, create a circle through 3 points and add a radius dimension. Now we add a corner relief, create the corresponding unfold solid and open the first unfold sketch again. Adding a concentric circle of 3 mm radius reveals that we have found out how the internal circle is positioned as the new circle fits perfectly into the cut-out of the relief\'s unfold solid.
![](https://raw.githubusercontent.com/FreeCAD/FreeCAD-documentation/master/wiki/images/SheetMetal_AddCornerRelief-11.png)
![](https://raw.githubusercontent.com/FreeCAD/FreeCAD-documentation/master/wiki/images/SheetMetal_AddCornerRelief-12.png)
Default corner with unfold sketch → Corner with default relief and the same unfold sketch
Trying to set the property Size to a value below the determined 1,67 mm will result in an error; any value above should work fine.
Switching to Circle-Scaled and creating another unfold solid shows that 1,67 mm is the base for the property Size Ratio, too.
Notes
- The k factor defines where within the thickness of a sheet the neutral axis is located according to the ANSI standard.
- The selection accepts more than two edges, but only the first two edges are taken into account.
Properties
See also: Property editor.
A SheetMetal CornerRelief object is derived from a Part Feature object or, if it is inside a PartDesign Body, from a PartDesign Feature object, and inherits all its properties. It also has the following additional properties:
Data
{{Properties_Title|Parameters}}
-
ReliefSketch|Enumeration: \"Corner Relief Type\". {{value|Circle}} (default), {{value|Circle-Scaled}}, {{value|Square}}, {{value|Square-Scaled}}, {{value|Sketch}}.
-
Size|Length: \"Size of Shape\". Default: {{value|3,00 mm}}.
-
Size Ratio|Float: \"Size Ratio of Shape\". Default: {{value|1,50}}.
-
base Object|LinkSub: \"Base Object\". Links to the pair of edges defining the Corner Relief position.
-
kfactor|FloatConstraint: \"Neutral Axis Position\". Default: {{value|0,50}}.
{{Properties_Title|Parameters1}}
-
Sketch|Link: \"Corner Relief Sketch\".
-
XOffset|Distance: \"Gap from side one\". Default: {{value|0,00 mm}}.
-
YOffset|Distance: \"Gap from side two\". Default: {{value|0,00 mm}}.
⏵ documentation index > SheetMetal > Addons > External Command Reference > SheetMetal AddCornerRelief
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