SKM754C-69-17102513280_0010.jpg - ME 467 Exam 1 Fall 2017 NAME 21 An upset forging operation creates simple tokens(coins for a subway system The coins

SKM754C-69-17102513280_0010.jpg - ME 467 Exam 1 Fall 2017...

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Unformatted text preview: ME 467 Exam 1 Fall 2017 NAME: 21. An upset forging operation creates simple tokens (coins) for a subway system. The coins start as stock cylinders from an initial diameter of 20.0 mm. The initial cylinder height is 10 pt 6.75 mm. The strength coefficient for the metal = 550 MPa, and the strain hardening exponent = 0.20. Coefficient of friction at the die work interface = 0.10. The final token diameter = 30 mm, and its final thickness is 3 mm. Compute the maximum force that the press must apply to form the token. (NOTE: This is not a "coining" operation, it is upset forging). DO - 20 mm DIA D 30 mm DIA ho = 6.75 mm - 3 mm Initial stock Final Token =, 801 YA = Kene 527.423 M Pd - 1.400 Fa Ke YEAR = (1. 4 ) (527. 427 mom F 521, 939 8 80 N Page 10 of 13 C...
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