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Objectives :
Objectives :
To describe formability of material.
To perform test for the determination and comparison of formability.
Experimental Video: 1
Experimental Video: 1
(Sheet Metal Testing)
Video elucidate :
Basic principle
Testing Machine
Practical procedure
Ref- ZwickRoellTV (2012) ZwickRoell Sheet Metal Testing - Blechumform-Prüfmaschine.
Available at: https://youtu.be/-NYJsuI9Oxg (Accessed: 19 Sept 2020).
Experimental Video : 2
Experimental Video : 2
(Cupping Test)
Video elucidate :
Testing Machine
Practical procedure
Ref- NOVOTEST WORLD (2015) Erichsen Cupping Test NOVOTEST SE-1 in operation.
Available at: https://youtu.be/CYM9plKt560 (Accessed: 19 Sept 2020).
Experimental Video (हिन्दी):
Experimental Video (हिन्दी):
Video elucidate :
Testing Machine
Practical procedure
(in Hindi)
Ref- Class Room DADA (2018) HOW TO DUCTILITY TEST (ERICH SEN CUPPING MACHINE) IN हिन्दी.
Available at: https://youtu.be/iJKx0_jMepg (Accessed: 19 Sept 2020).
Test Principle :
Test Principle :
Equipment Operating Procedure :
Equipment Operating Procedure :
Adjust the punch actuating wheel at "0" reading.
Hold the sheet between two ring-shaped clamping dies.
Fit the sheet with rotating the wheel.
Rotate punch actuating wheel so that a hemispherical punch of 20 mm is forced against one side of the sheet until fracture occurs or there is sudden drop in the load.
Observe the crack in the mirror, as it appears stop rotating wheel.
Note down the reading on micrometer scale. This is the height of the dome.
This is reported in mm as a measure of formability.
(The Cup height is very sensitive to the thickness of sheet and increases approximately by 0.24 mm with every 0.1 mm increase in sheet thickness.)
Observations :
Observations :
Diameter of punch (D) = 20 mm
Sheet thickness (t) in mm
Sheet Height (H) in mm
Nature of crack - Radial or Circumferential types
Conclusion:
Conclusion:
Formability of Aluminum is_____mm. We observed Radial/ Circumferential crack material is isotropic/anisotropic.
Formability of Brass is_____mm. We observed Radial/ Circumferential crack material is isotropic/anisotropic.
Aluminum is more/less ductile than Brass.
Additional Resources:
Additional Resources:
Questions/ Assignments Submission:
Questions/ Assignments Submission:
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