Since commercial sheet metal bending can be done with less concern for stresses caused during forming operation the radius can be near zero for thin sheet metal.
Relief ratio sheet metal.
When sheet metal makes a transition from a bend to a flat surface or to another bend it tends to rip and tear.
It is most economical to use a single bend radius throughout the design but if necessary you can utilize multiple radii.
If you select rectangular or obround specify the relief ratio.
To eliminate this a bend relief is added so the edge of the sheet metal is perpendicular to the bend.
Right click the sheet metal feature in the featuremanager design tree and select edit feature.
The minimum bend radius data shown in these charts is measured to the inside of the bend.
Ratios are configured for the hard material condition.
6 shows when the ratio to thickness is used in a obround relief the width ratio has more influence on the shape of the relief than the length ratio.
Enter relief size by bend radius ratio or force bend reliefs.
The length ratio 3 2 fig.
User can configure the ratio based on the material.
In the propertymanager under auto relief change the type of relief cut.
The width of the relief cut and the depth it extends past the bend will be determined by relief ratio part thickness.
Choose create relief in the sheet metal menu.
For a 3 width ratio when the part is 1 mm in thickness the width of the slot will be 3 mm.
Bend radii minimum bend sizes.
Sheet metal fabrication is the process of forming parts from a metal sheet by punching cutting stamping and bending.
Examples of i tear.
Sheet metal in solidworks sheet metal parts are generally used as enclosures for components or to provide support to other.
The value of the relief ratio must be between 0 05 and 2 0.
Do one of the following.
Click the create relief tool button on the sheet metal ribbon tab.
Select an item see the note below.
Type smreliefcreate in the command bar.
Quick video about bend radius watch more tech tip videos bend radii minimum bend sizes.
Once the base flange feature is created this setting will be.
Select a hard edge bend face flange face or 3d solid entire model.
The higher the value the larger the size of the relief cut added during insertion of bends.
Protocase tech tip video.
In general a minimum bend relief is equal to the material thickness plus the inside bend radius.
3d cad files are converted into machine code which controls a machine to precisely cut and form the sheets into the final part.
The value of the relief ratio must be between 0 05 and 2 0.
7 only affects the relief within a narrow margin.
The bend radii listed are standard minimum if manufacturing for aircraft and aerospace applications.
