Sheet Metal Pierce And Extrude

Extruding a hole sounds like a reasonably easy process.

Sheet metal pierce and extrude.

Piercing operation produces an extruded hole or slot. What could go wrong. Piercing of all the holes is best done together to ensure good hole to hole tolerance and part repeatability. Piercing can also be combined with other operations such as lance and form to make a small feature such as tab pierce and extrude to make an extruded hole.

All these operations can be combined with blanking. Clinch nuts vs tapped extrusions sheet metal ornerynorsk industrial 27 aug 13 15 31 installing a clinch nut vs pierce extrude tap is about a horse apiece when considering semi automated labor. Extrude tite screws were designed to resolve the fastening problems of stripping and spin out in thin sheet metal found when using standard round bodied sheet metal screws. This causes metal to be pulled from the apron area around the extrusion creating a drawing effect.

Die buttons with oversized internal diameters typically with a 020 radius instead of a cutting edge are used to permit the material to flow downward and punch an extruded hole. At the beginning of the stroke the metal is pinched very tightly between the face of the extrusion punch and the high pressure pad. Embossing is a raised or sunken indentation in sheet metal without cutting the material one of many forming operations that can be done with unipunch tooling. To request a quote provide screw sizes and material type and thickness.

Another ideal application for unipunch tooling is the pierced and extruded hole to prepare sheet metal for tapping. As explained in the above image. Just pierce a hole into a metal blank and bend the metal down to create a continuous radial profile. In other words piercing operation produces an extruded hole in sheet metal.

A pre punched hole is required as a one hit pierce and extrude gives poor hole quality and has limited adjustment on the machine. As a result of applied force from the piercing tool sheet metal starts tearing and produces extruded hole slot.