EBK MANUFACTURING ENGINEERING & TECHNOL
7th Edition
ISBN: 9780100793439
Author: KALPAKJIAN
Publisher: YUZU
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Textbook Question
Chapter 13, Problem 35QLP
Can the forward slip ever become negative? Why or why not?
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Questions:
1. Two thick slabs of 300mm each, the first one is used in cold rolling where
u=0.08 while the second is used in cold rolling where u-0.5. The mill roll
diameter in each case is the same as 600mm. Determine the max draft
(reduction) in both cases. Discuss the wide difference in results.
=
2. A tensile specimen of the metal of 100 mm is length stretched to a length
157 mm during the rolling process. If the metal has a flow curve with
parameters: K = 850 MPa and strain hardening exponent n = 0.30. Determine
the average flow stress that the metal has been subjected to during the
deformation.
Why the cupping test may not predict well the formability of sheet metals in actual forming
processes?
Cupping test uses square or rectangular specimens only.
Strain in some forming operations is not axi-symmetric.
Cupping test is mainly for compression
Stress is rarely uni-directional in sheet metal forming.
I need the answer as soon as possible
Chapter 13 Solutions
EBK MANUFACTURING ENGINEERING & TECHNOL
Ch. 13 - What is the difference between a plate and a...Ch. 13 - Define roll gap, neutral point, and draft.Ch. 13 - What factors contribute to spreading in flat...Ch. 13 - What is forward slip? Why is it important?Ch. 13 - Describe the types of deflections that rolls...Ch. 13 - Describe the difference between a bloom, a slab,...Ch. 13 - Why may roller leveling be a necessary operation?Ch. 13 - List the defects commonly observed in flat...Ch. 13 - What are the advantages of tandem rolling? Pack...Ch. 13 - How are seamless tubes produced?
Ch. 13 - Why is the surface finish of a rolled product...Ch. 13 - What is a Sendzimir mill? What are its important...Ch. 13 - What is the Mannesmann process? How is it...Ch. 13 - Describe ring rolling. Is there a neutral plane in...Ch. 13 - How is back tension generated?Ch. 13 - Explain why the rolling process was invented and...Ch. 13 - Flat rolling reduces the thickness of plates and...Ch. 13 - Explain how the residual stress patterns shown in...Ch. 13 - Explain whether it would be practical to apply the...Ch. 13 - Describe the factors that influence the magnitude...Ch. 13 - Explain how you would go about applying front and...Ch. 13 - What typically is done to make sure that the...Ch. 13 - Make a list of parts that can be made by (a) shape...Ch. 13 - Describe the methods by which roll flattening can...Ch. 13 - It was stated that spreading in flat rolling...Ch. 13 - Flat rolling can be carried out by front tension...Ch. 13 - Explain the consequence of applying too high a...Ch. 13 - Note in Fig. 13.3f that the driven rolls (powered...Ch. 13 - Describe the importance of controlling roll...Ch. 13 - In Fig. 13.9a, if you remove the top compressive...Ch. 13 - Name several products that can be made by each of...Ch. 13 - List the possible consequences of rolling at (a)...Ch. 13 - It is known that in thread rolling, as illustrated...Ch. 13 - If a rolling mill encounters chatter, what process...Ch. 13 - Can the forward slip ever become negative? Why or...Ch. 13 - In Example 13.1, calculate the roll force and the...Ch. 13 - Calculate the individual drafts in each of the...Ch. 13 - Estimate the roll force, F, and the torque for an...Ch. 13 - A rolling operation takes place under the...Ch. 13 - Estimate the roll force and power for annealed...Ch. 13 - A flat-rolling operation is being carried out...Ch. 13 - A simple sketch of a four-high mill stand is shown...Ch. 13 - Obtain a piece of soft, round rubber eraser, such...Ch. 13 - If you repeat the experiment in Problem 13.45 with...Ch. 13 - Design a set of rolls to produce cross-sections...Ch. 13 - Design an experimental procedure for determining...Ch. 13 - Derive an expression for the thickest workpiece...
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- Why are guidelines drawn on the surface of a free-bend specimen?arrow_forward4. How we can measure shear modulus?arrow_forward0/ Two thick slabs of 300mm each, the first one is used in cold rolling where μ=0.08 while the second is used in cold rolling where µ-0.5. The mill roll diameter in each case is the same as 600mm. Determine the max draft (reduction) in both cases. Discuss the wide difference in results.arrow_forward
- Please Identify the correct answer along with concise reasoning( Step-by-step is preferred) on why the selected option is the right answer. Please also explain concisely why the remaining options are incorrect. I'll rate for the response positively if the answer is correct. Thx!arrow_forwardWhat is rolling process and its parameters? Diagrams?arrow_forwardThis is a True or false question that has been bothersome please helparrow_forward
- I need Answer & Explanation In Handwritten Format. Take time ,No hurry.arrow_forwardHow to study rolling process and its parameters?arrow_forwardHomework: In hot rolling process, the following data was collected: N=20rpm, R=20cm, to=40mm, tF35mm, C=415MPA, m=0.02, w-60cm one pass rolling. Find Froll, T and Power.arrow_forward
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