Design Rules For Sheet Metal Stamping

Why manufacturing and component design teams don t collaborate on each job is inexplicable.

Design rules for sheet metal stamping. Bend relief is provided at the end of bending edge in sheet metal design to avoid any crack tearing in the corner. Because sheet metal parts are manufactured from a single sheet of metal the part must maintain a uniform wall thickness. The bend allowance is defined as the added length to the actual leg lengths of the part in order to develop a flat pattern. As this happens it gains a small amount of total length in the stamped part.

Also the stretching and compression of forming can distort holes adjacent to a form or bend. 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.

3 stamping is done by equipment and molds. A distance of 16 to 20 millimeters from the draw bead usually is sufficient for aluminum stampings. It is always better to specify hole diameters that are greater than the sheet s thickness t. In a sheet metal design specifying hole sizes locations and their alignment is critical.

Holes are best kept at least 2 times material thickness beyond the radius of a formed feature. 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. Punch equipment mold and raw materials. The drawbar radius should be a minimum of 20 millimeters.

1 stamping is carried out at room temperature that is it does not require heating so it is called cold stamping. Extrude hole size position guidelines creating an extruded hole using a punching process requires extreme pressure force. When the metal sheet folded or bent the metal around the bend is deformed and stretched. 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.

2 the objects of stamping processing are all sheets so it is also called sheet metal stamping. 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. 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. It needs three elements.