1. Classification based on operations performed: 1.Shearing · Piercing · Punching · Perforating · Blanking · Cutting off · Parting off · Notching · Slitting · Lancing 2. Bending · Angle bending · Curling · Forming · Plunging 3.Drawing · Cupping 4.Squeezing · Coining · Embossing · Flattening 2. Classification based on construction: · Simple · Follow or progressive · Combination · Compound Source: Press Operation Classification EXPLANATION ACCORDING TO OPERATIONS: 1. Shearing operation: The shearing operation between a punch and a die is illustrated in Fig. As the punch descends upon the workpiece, the pressure exerted by the punch causes the metal to be deformed plastically in the die. · 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 ...
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