Cold working processes

 Cold working processes:
Below the recrystallization temperature if the mechanical work is done on the metals , there will no grain growth but it must be grain this integration elongation , the process is known is cold working processes. In cold working process greator pressure is required than that required in hot working. As the metal is in a more rigid state. It is not permanently deform until stress exceeds the elastic limit. Most of the cold processes are performed at room temperature , the different cold working processes are
1: Drawing
·        Wire drawing
·        Tube drawing
·        Blanking
·        Spinning
2:  Sequeezing
·        Coining
·        Sizing
·        Riveting
 3:   Bending
·        Angle bending
·        Plate bending
·        Roll forming
 4:  Shearing
      >Punching                >Blanking
           > Trimming               > Perforating
             >Notching                     >Launcing

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