Sheet Metal Cutting Operations

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Sheet metal cutting operations involves the removal of the material from larger sheet. It is caused by shearing forces acting on the metal through the edges of the punch and die. Variety of sheetmetal cutting operations are possible. In this article we will discuss various sheet metal cutting operations and their application. Various sheet metal cutting operations are given below. 

Shearing Operation

Shearing operation involves cutting of sheet in a straight line or at an angle. It is preliminary used to cut a larger sheet into smaller sheets.

Sheet Metal Blanking

Blanking operation produces a enclosed part from large piece of sheet metal. As a result blank part is used as final product.

For example disk or plane washers are manufactured with blanking operation. 

Read this article to know the difference between blanking punching and piercing.

Sheet metal Punching

Punching operation removes scrap from the larger piece of sheet metal. Therefore larger piece of sheet metal becomes final product. In another words, combination of punching operations deliver final product.

Various sheet metal Punching operations are given below.

  • Slotting
  • Lancing
  • Nibbling
  • Perforation
  • Piercing
Slotting

Punching operation in which a rectangular tool creates a rectangular slot in sheet.

Lancing

Punching operation in which the work piece is sheared and bent with one strike of the die. This operation is used to make tabs, vents, and louvers. Lancing operation is done on a mechanical press. 

Nibbling

Nibbling process is used to cut a contour by a series of overlapping punches. Complex shapes can be cut in sheet metal using simple tools (round or rectangular punches) with nibbling process.

For example, Combinations of series of punches of small diameter (2mm) can make round hole of larger diameter (20 mm). 

Perforation

Perforation involves punching a large number of closely spaced holes. Specialized tools and machines are also available for perforation. 

Piercing
Piercing operation produces extruded hole or slot

Piercing operation produces extruded hole or slot. As a result of applied force from piercing tool, sheet metal starts tearing and produces extruded hole/slot.

In another words, Piercing is combination of cutting and forming operation.

Notching in Sheetmetal

Notching is a sheetmetal cutting operation to remove material from work piece. It is used to provide relief to sheet metal bend area.

Notching is a sheetmetal cutting operation to remove material from work piece. It is used to provide relief to sheet metal bend area.

Trimming

Trimming involves the removal of excess material from the perimeter of work piece.

Trimming involves the removal of excess material from the perimeter of work piece. It is the last operation in sheet metal manufacturing.

Deburring in Sheet metal

Deburring is a finishing operation. Where excess material is removed from a sheet metal part. It is used to remove all sharp edges and corners to make the part smooth.

Noga DB1000 sheet metal deburring tool

Conclusion

To sum up, various sheet metal cutting operations are used to provide desired shape to sheet metal parts. Type of operation used depends on product design requirements.

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