Enlist press operations . Explain lancing and piercing.

Enlist press operations . Explain lancing and piercing. 
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1 Answer

Answer :

Press Operations:

[1] Cutting or Shearing Operations: Blanking, Punching, Piercing, Notching, perforating, trimming, shaving, slitting, lancing.

[2] Bending Operation: Angle bending

[3] Forming Operations: Flanging, curling, wiring, tube forming, stretch forming, embossing

[4] Drawing Operations: Cupping, redrawing, Reverse redrawing, deep drawing, panel drawing, bulging. 

[5] Reducing Operations: Ironing, necking, redrawing

[6] Squeezing Operation: Coining, sizing, swaging, hot pressing.


Lancing operation:

The lancing is the operation of cutting a sheet metal through part of its length and then bending the cut portion. It is the operation of cutting through a metal sheet partially without removing any material, in which a hole is partially cut and then one side is bent down to form a sort of tab or louver. Since no metal is removed, there will be no scrap. This operation commonly incorporates a single shear angle on the face of the punch.

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Piercing: The piercing is the operation of production of hole in a sheet metal by the punch and the die. The materials punched out to form the hole constitute the waste. The punch point diameter in the case of piercing is less than or equal to the work material thickness. The punch governs the size of the hole and clearance is provided on the die. Figure shows punch and die set for piercing. 

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