Relief Ratio Sheet Metal

The value of the relief ratio must be between 0 05 and 2 0.

Relief ratio sheet metal. In the propertymanager under auto relief change the type of relief cut. In general a minimum bend relief is equal to the material thickness plus the inside bend radius. Sheet metal in solidworks sheet metal parts are generally used as enclosures for components or to provide support to other. 7 only affects the relief within a narrow margin.

If you select rectangular or obround specify the relief ratio. The length ratio 3 2 fig. Ratios are configured for the hard material condition. The higher the value the larger the size of the relief cut added during insertion of bends.

Sheet metal parts with a minimum of 0 9mm to 20mm in thickness can be manufactured. To eliminate this a bend relief is added so the edge of the sheet metal is perpendicular to the bend. The higher the value the larger the size of the relief cut added during insertion of bends. Right click the sheet metal feature in the featuremanager design tree and select edit feature.

A 1 degree tolerance on all bend angles. D relief ratio part thickness the bend region is represented by the dark gray area of the diagram. Bends in sheet metal are manufactured using sheet metal brakes. When starting a sheet metal part by creating a base flange feature one of the initial parameters along with sheet metal gauge and bend allowance are the auto relief settings.

When sheet metal makes a transition from a bend to a flat surface or to another bend it tends to rip and tear. User can configure the ratio based on the material. Examples of i tear ii obround and iii rectangle. This check computes inside bend radius and checks the ratio of bend radius to sheet thickness.

The higher the value the larger the size of the relief cut added during insertion of bends. When designing parts for laser cutting one should not make holes smaller than the thickness of the material. For a 3 width ratio when the part is 1 mm in thickness the width of the slot will be 3 mm. 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.

Auto relief types rectangular tear obround using understanding auto relief ratio cases when relief not working. When sheet metal makes a transition from a bend to a flat surface or to another bend it tends to tear depending on the geometry.