Forgings

  • Cold Forging - Near net shape forging is most common when parts are forged without heating the slug, bar or billet. Aluminium is a common material that can be cold forged depending on final shape. Lubrication of the parts being formed is critical to increase the life of the mating dies.
     

  • Drop Forging - Drop forging is a forging process where a hammer is raised and then "dropped" onto the workpiece to deform it according to the shape of the die. There are two types of drop forging: open-die drop forging and closed-die drop forging. As the names imply, the difference is in the shape of the die, with the former not fully enclosing the workpiece, while the latter does.
     

  • Press Forging - Press forging works by slowly applying a continuous pressure or force, which differs from the near-instantaneous impact of drop-hammer forging. The amount of time the dies are in contact with the workpiece is measured in seconds (as compared to the milliseconds of drop-hammer forges). The press forging operation can be done either cold or hot.
     

  • Roll Forging - Roll forging is a process where round or flat bar stock is reduced in thickness and increased in length. The advantage of this process is there is no flash and it imparts a favourable grain structure into the workpiece.
     

  • Upset Forging - Upset forging increases the diameter of the workpiece by compressing its length. Based on number of pieces produced, this is the most widely used forging process. A few examples of common parts produced using the upset forging process are engine valves, couplings, bolts, screws, and other fasteners.

ADVANTAGES

Parts manufactured by forging are stronger

It is more reliable and less costly

It offers better response to heat treatment

It offers more consistent and better metallurgical properties

It offers broad size range of products

It requires fewer secondary operations

It has great design flexibility

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