Materials Science and Manufacturing Engineering Miscellaneous


Materials Science and Manufacturing Engineering Miscellaneous

Materials Science and Manufacturing Engineering

  1. The cutting force in punching and blanking operations mainly depends on









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    Cutting force = τ × A
    τ = Shear strength

    Correct Option: B

    Cutting force = τ × A
    τ = Shear strength


  1. A 50 mm diameter disc is to be punched out from a carbon steel sheet 1.0 mm thick. The diameter of the die should be (Take clearance as 3% of sheet thickness) _______.









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    Clearness should be given on punch in Blanking operation. Die should be exact.

    Correct Option: B

    Clearness should be given on punch in Blanking operation. Die should be exact.



  1. The thickness of the blank needed to produce, by power spinning a missile cone of thickness 1.5 mm and half cone angle 30°









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    Thickness of blank =
    cone thickness
    cos( 2α )

    Thickness of blank =
    1.5
    = 3 mm
    cos60°

    Correct Option: A

    Thickness of blank =
    cone thickness
    cos( 2α )

    Thickness of blank =
    1.5
    = 3 mm
    cos60°


  1. For blanking and piercing operations, clearance is provided on the..... and the.... respectively.









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    Punch & Die

    Correct Option: A

    Punch & Die



  1. The blank diameter used in thread rolling will be









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    NA

    Correct Option: D

    NA