Extruded Tapped Hole Sheet Metal

Avoid large sheet metal parts with small bent flanges.

Extruded tapped hole sheet metal.

Performance in extruded holes is slightly higher than in drilled holes. The minimum distance from an extruded hole to a bend is three times the material thickness plus the bend radius. Prepunched or extruded holes on the sheet are threaded through a coordinated rotation of the turret press autoindex station and ram stroke. In low carbon steel sheet metal the minimum radius of a bend should be one half the material thickness or 0 80 mm.

Extruded holes very close to the part edge can lead to sheet metal deformation or tearing. 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. Creating an extruded hole using a punching process requires extreme pressure force.

A pre punched hole is required as a one hit pierce and extrude gives poor hole quality and has limited adjustment on the machine. Avoid large sheet metal parts with small bent flanges. The tooling produces a full range of threaded holes in. Tapped holes may need to be re tapped after plating to ensure accuracy.

Extruded tapped hole u nuts push the workpiece material downward to create a tapped hole. Extrusions our commonly used to accept sheet metal screws or permit tapping into a deeper distance than just the material thickness. Extruded hole to part edge b 3t d 2. 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.