Extruded Tapped Hole Sheet Metal

Prepunched or extruded holes on the sheet are threaded through a coordinated rotation of the turret press autoindex station and ram stroke.

Extruded tapped hole sheet metal.

Extruded hole to part edge b 3t d 2. Extrusions our commonly used to accept sheet metal screws or permit tapping into a deeper distance than just the material thickness. Performance in extruded holes is slightly higher than in drilled holes. In low carbon steel sheet metal the minimum radius of a bend should be one half the material thickness or 0 80 mm.

The following illustration shows the extruded hole geometry. Tap fix screws for extruded holes in light gauge steel this article provides tap fix hole size recommendations for metals using light gauge punched extruded materials. 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.

Tapped holes may need to be re tapped after plating to ensure accuracy. The minimum distance from an extruded hole to a bend is three times the material thickness plus the bend radius. A pre punched hole is required as a one hit pierce and extrude gives poor hole quality and has limited adjustment on the machine. They are used in thin materials.

Design for manufacturability sheet metal guidelines bends for the ease of manufacturing multiple bends on the same plane should occur in the same direction. Creating an extruded hole using a punching process requires extreme pressure force. Extruded tapped hole u nuts push the workpiece material downward to create a tapped hole. The tooling produces a full range of threaded holes in.