Piercing Operation In Sheet Metal

Difference between blanking and piercing.

Piercing operation in sheet metal.

Piercing in sheet metal. It consists of several different material parting operations such a piercing perforating shearing notching cutoff and blanking. As explained in the above image. The punch used in the piercing operation is usually bullet shaped.

Piercing is the operation of punching holes in the sheet metal. Sheet metal fabrication is a metalworking process to cut and form sheet metal into the desired shape which can be useful for end applications. The nibbling process cuts a contour by producing a series of overlapping slits or notches. There are two main operations of the sheet metal fabrication process.

Piercing is the process in which desired shape holes are produced in a piece of sheet metal without eliminating any material from the sheet or removing a very small amount of material as shown in the figure. As a result of applied force from a piercing tool sheet metal starts tearing and produces an extruded hole or slot. In other words piercing is a combination of cutting and forming operation. Piercing operation in sheet metal piercing operation produces an extruded hole or slot in sheetmetal.

Notching is a piercing operation that removes material from the edge of the workpiece. This allows for complex shapes to be formed in sheet metal up to 6 mm 0 25 in thick using simple tools. In case of piercing or punching the material which is cut out from the sheet metal is scrap and the reining material is the actual part. As a result of applied force from the piercing tool sheet metal starts tearing and produces extruded hole slot.

Both punch and die are also applied in this operation. In other words piercing operation produces an extruded hole in sheet metal. One is cutting and the other is bending. Piercing operation produces an extruded hole or slot.

Blanking piercing and punching comes under sheet metal cutting operations. The process and machinery are usually the same as that used in blanking except that the piece being punched out is scrap in the piercing process. Both blanking and piercing are shearing operations.