more cutting metals

more cutting metals

1. hand forging

   • iron and steel can be heated until they are soft
     • metal can then be reformed by applying force from a hammer or press.
       • this process is known as forging
   • shaping by forging (rather than cutting the material by hand or machine tool)
     • ensures that the natural grain flow of the meterial is used to strengthen the components being made.
   • traditionally, blacksmiths forge metals using;
     • a hearth to heat the iron or steel
     • an anvil to withstand the hammer blowws.
   • by bending, twisting and hammering, a wide variety of forms can be produced

2. drop forging

   • industrial forging is done by a process called drop forging or die forging
     • a piece of white hot metal is placed between two dies.
     • a very large force is applied in a single blow by a mechanical hammer
     • a similar cold forging process is used to stamp out coins and medals, it is appropriately called coining

3. sawing

   • hand saws
     • hack saw
     • junior hack saw
     • piercing saw
       • accurate work
   • machine sawing
     • the powered hack saww
       • uses forwards/ backwards motion that copies the manual verision
       • is driven by a crank slider mechanism.
     • scroll saws use blades that can be used for thin sheet metals