Design Rules For Sheet Metal Stamping

Holes are best kept at least 2 times material thickness beyond the radius of a formed feature.

Design rules for sheet metal stamping.

When the metal sheet folded or bent the metal around the bend is deformed and stretched. When the manufacturing team and component design team work together the result is the best design for manufacturing and sometimes a component stamping cost savings of as much as 50 percent. Stamping design guidelines jonathan zhang 2 stamping design guideline stamping includes a variety of sheet metal forming manufacturing processes using a machine press or stamping press the processes including punching blanking embossing bending forming drawing flanging and coining. 1 stamping is carried out at room temperature that is it does not require heating so it is called cold stamping.

This could be a single stage operation where every. Relief height is generally kept greater than two times of sheet thickness plus bend radius. The rule of thumb in stamping design is to leave a minimum of 1 1 2 times material thickness between trimmed or perforated features. As this happens it gains a small amount of total length in the stamped part.

The drawbar radius should be a minimum of 20 millimeters. It needs three elements. The bend allowance is defined as the added length to the actual leg lengths of the part in order to develop a flat pattern. It is always better to specify hole diameters that are greater than the sheet s thickness t.

2 the objects of stamping processing are all sheets so it is also called sheet metal stamping. The die radius should be nine times the sheet thickness along the straight sides and nine to 12 times the sheet thickness in the corners. Extrude hole size position guidelines creating an extruded hole using a punching process requires extreme pressure force. Since the sheet metal has thickness of 019 inches there must be a gap between the two dies that allows the sheet metal to fit during the stamping process.

While it would be possible to include this offset in my 3d models i decided to incorporate it later on in the process. Because sheet metal parts are manufactured from a single sheet of metal the part must maintain a uniform wall thickness. Sheet metal parts with a minimum of 0 9mm to 20mm in thickness can be manufactured. Bend relief is provided at the end of bending edge in sheet metal design to avoid any crack tearing in the corner.

A distance of 16 to 20 millimeters from the draw bead usually is sufficient for aluminum stampings. 3 stamping is done by equipment and molds. When designing parts for laser cutting one should not make holes smaller than the thickness of the material. In a sheet metal design specifying hole sizes locations and their alignment is critical.