Edge Distance For Holes In Sheet Metal

In a sheet metal design specifying hole sizes locations and their alignment is critical.

Edge distance for holes in sheet metal. Though these calculations can help you approximate the minimum distance you ll need to place between a hole and the edge or bend in sheet metal different situations call for. The preferred distance. In low carbon steel sheet metal the minimum radius of a bend should be one half the material thickness or 0 80 mm 0 03 inch whichever is larger. Avoid large sheet metal parts with small bent flanges.

Dfmpro provides pre configured design guidelines dfm best practices which helps to develop better quality parts at reduced cost. When designing parts for laser cutting one should not make holes smaller than the thickness of the material. Creating an extruded hole using a punching process requires extreme pressure force. Dfmpro for sheet metal.

A look at the formula for the edge distance or setback that is required when drilling rivet holes near the edge of a metal sheet. The strength of riveted met. Extruded holes very close to the part edge can lead to sheet metal deformation or tearing. Therefore the minimum distance between the extruded hole to edge if maintained.

Some of the common sheet metal design guidelines included are minimum distance between holes cutouts slots distance between holes cutouts slots to part edge and bends multiple bends in same direction minimum bend radius minimum radius. 45 gussets shouldn t be designed to be more than 4 times material thickness on their flat edge. If they are placed too far away from the edge the sheet is apt to turn up at the edge. Sheet metal parts with a minimum of 0 9mm to 20mm in thickness can be manufactured.

The minimum space between the edge and holes should be at least the sheet. A 1 degree tolerance on all bend angles. Bends in sheet metal are manufactured using sheet metal brakes. On most repairs the general practice is to use the same rivet spacing and edge distance that the manufacturer used in the surrounding area or the structural repair manual for the particular aircraft may be consulted figure and edge distance.

In most cases minimum hole bend distance equals 1 5 times sheet thickness plus bend radius though the multiplying factor may increase as hole size increases in diameter.