Sheet Metal Hole Extrude

You can imagine the shape as being a body to the punch of any shape and from this protrudes the punch pin of the diameter you want.

Sheet metal hole extrude.

The mandrel is fitted within this hole. H r h r h r h r h r h r. A pre punched hole is required as a one hit pierce and extrude gives poor hole quality and has limited adjustment on the machine. Recommended minimum distance between hole slot edge to bend in sheet metal design is three times the sheet thickness plus bend radius.

Extrusions our commonly used to accept sheet metal screws or permit tapping into a deeper distance than just the material thickness. 0 024 0 035 0 042 0 048 0 06 0 09 0 106 0 122. Usually thought of for larger parts that require individual attention bending cutting forming joining sheet metal fabrication still is a major manufacturing process. Performance in extruded holes is slightly higher than in drilled holes.

Center to center distance between two holes minimum center to center distance between two holes in sheet metal parts is required to avoid metal distortion deformation and fracturing. First prevailing off torque is an indication of locking torque and resistance to vibrational loosening and is favorably high for extrude tite screws in thin sheet metal. All materials can be formed with thickness of metal varying from 0 020 0 5mm up to 0 25 6 5 mm. The extruded metal flows between the mandrel and the die surfaces forming the part.

D inches aproximate material thickness t inches. For the tapped screw hole this is typically made using a male punch that creates the hole and extrudes the metal.