Extruded Tapped Hole Sheet Metal

Avoid large sheet metal parts with small bent flanges.

Extruded tapped hole sheet metal.

They are used in thin materials. 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. Prepunched or extruded holes on the sheet are threaded through a coordinated rotation of the turret press autoindex station and ram stroke. Creating an extruded hole using a punching process requires extreme pressure force.

The minimum distance from an extruded hole to a bend is three times the material thickness plus the bend radius. Performance in extruded holes is slightly higher than in drilled holes. Extruded tapped hole u nuts push the workpiece material downward to create a tapped hole. 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. Avoid large sheet metal parts with small bent flanges. Extrusions our commonly used to accept sheet metal screws or permit tapping into a deeper distance than just the material thickness. 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.

Design for manufacturability sheet metal guidelines bends for the ease of manufacturing multiple bends on the same plane should occur in the same direction. A pre punched hole is required as a one hit pierce and extrude gives poor hole quality and has limited adjustment on the machine. The following illustration shows the extruded hole geometry. In low carbon steel sheet metal the minimum radius of a bend should be one half the material thickness or 0 80 mm.