Describe briefly, hand forging and machine forging.
1 Answer
Answer :
Hand Forging:
[1] Hand forging is the oldest type of metal working process and has influenced the formation of other materials through the age.
[2] Smith forging was formerly the process envisioned when we think of the blacksmith wielding a hammer against a piece of hot metal placed upon a rigid anvil.
[3] The modern process is the same except that the crafts-person uses a mechanical hammer and manipulators to move heavy pieces.
[4] Hand forging is performed in the black smithy shop. The job is heated at the forging temperature in hearth and it is then brought on anvil using tong.
[5] It is then forged using hand hammers and other hand forging tools for imparting specific shape.
Machine (Power) Forging:
[1] Hand hammer blows impact will not be always sufficient enough to affect the proper plastic flow in a medium sized or heavy forging.
[2] It also causes fatigue to the hammer man. To have heavy impact or blow for more plastic deformation, power hammer are generally employed.
[3] These hammers are operated by compressed air, steam, oil pressure, spring and gravity. [4] They are generally classified as spring hammer and drop hammers. The capacity of these hammers is given by the total weight.
[5] The heavier these parts and greater the height from which they fall, the higher will be intensity of blow the hammer will provide.