Question

Hot forging is used to reduce a metallic cylindrical workpiece with a diameter of 12 cm and height of 25 cm to a height of 12 cm. Barreling of the workpiece is eminent knowing that the coefficient of friction of the open die plate with the workpiece is 0.3. The process takes 8 seconds to complete at a constant forging speed. The strength coefficient of the workpiece C= 200 MPa and strain rate sensitivity exponent m = 0.32. Calculate the following:

- The maximum forging force (kN).
- The power of the machine (W) knowing that forging machines has 70% efficiency.

Answer #1

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