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MANUFACTURING PROCESS UNIT 3, SHEET METAL WORKING, SHEET METAL BENDING,…

- - - - Large deformation can be obtained.
        In hot working process, the grain structure of the metal is refined and thus mechanical properties improved.
        Porosity of the metal is considerably minimized.
        If process is properly carried out, hot work does not affect tensile strength, hardness, corrosion resistance, etc.
        Concentrated impurities, if any in the metal are disintegrated and
        distributed throughout the metal.
    - - *Some metals cannot be hot worked because of their
        brittleness at high temperatures.
        Handling and maintaining of hot working setups is
        difficult and troublesome.
        Because of the thermal expansion of metals, the
        dimensional accuracy in hot working is difficult to achieve.
        Rapid oxidation of metals occurs.*
    - - ROLLING
      - FORGING
        
        FORGING METHODS
        
        DROP FORGING
        
        PRESS FORGING
        
        SMITH
        OR
        HAND FORGING
        
        SWAGING
        
        PUNCHING
        
        DRIFTING
        
        FLATTENING
        
        BENDING
        
        FULLERING
        
        MACHINE
        OR
        UPSET FORGING
      - HOT DRAWING
      - EXTRUSION