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  3. 2 describe the effects of controlling rolling speed temperature friction...

Question: 2 describe the effects of controlling rolling speed temperature friction...

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2. Describe the effects of controlling rolling speed, temperature, friction, and rolling force on a rolling operation. Describe how the proper selection of the blanks volume in closed-die forging affects the quality of the finished part? Included in the discussion should be the cases when the blanks volume is too large and too small. A forging operation presses an Aluminum 1100-0 workpiece that is 100 mm thick, 25 mm wide, and 40 mm high. The friction coefficient is u0.2. Estimate the forging force that is required to reduce the height by 30%. A rolling operation will cold-roll an Aluminum 5052-O rectangular slab that is 0.25 m wide from a thickness of 35 mm to 20 mm on a mill at room temperature that has a roll diameter of 600 mm. The friction coefficient is μ-0.25. Estimate the maximum roll pressure and maximum roll force. Assume that the slabs width remains constant during the rolling process. 3. 4. 5.

values for Kand m in Eq. [2.11)room temperature unless nated

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