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Punching

Punching is a separation process in which a sheet is perforated by a single stroke of the machine. Individual hits can produce shapes such as circular holes or outer contours.

punching
shearing
shearing sketch
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Shearing

Shearing punches does not overlap, resulting in a faster process but sometime unwanted small edge protrusion.

sloting
sloting sketch
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Sloting

Sloting punches does overlap, resulting in a slower process, but essential, when smooth edges are desired

nibling
nibling sketch
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Nibling

Nibling is a process when curved contours or bigger holes are desired, therefore changing the punch head with either a circular one or a crescent one to perform the process.

Forming

The additional of forming capabilities greatly increases the versatility of punch presses. No longer just machines for making holes in sheet metal. punch presses have been used for years to produce common formed features such as extrusions, beads, and louvers. The tools are designed so that the workpiece is formed between the punch and die.

forming
extruding

Extruding

Extrusion is a forming process that forms material outward that is sometimes used to increase surface grip or used as a process before tapping, to increase the tap length.

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    Pre - Tapping
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    Guide Hole
tapping

Tapping

Punch presses can be equiped with tapping tool to produce threads, reducing post process work. Threads are made by first punching a hole and then forming the threads on the inside of the hole.

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    Fastening
center boss

Center Boss

Circular, flat elevation on the sheet. A hole is punched only partially through the sheet, causing the slug to protrude from the other side.

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    Assembly / Fastening aid
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    End stop for inserted elements
louver

Louver

Oblong opening in the sheet resembling a gill. The punch cuts and forms the louser in one stroke.

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    Ventilation slots in housings
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    Enclosures
bridge

Bridge

A strip projects from the sheet surface in a bridge-like fashion. The bridge is cut and formed in one stroke.

  • Cable Guide
  • Card Holder
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  • Fastening Aid