Manufacturing Engineering & Technology
7th Edition
ISBN: 9780133128741
Author: Serope Kalpakjian, Steven Schmid
Publisher: Prentice Hall
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Chapter 33, Problem 21QLP
To determine
What is the significance of surface-temperature rise resulting from friction? Give some examples based on topics covered in the preceding chapters.
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Explain in detail the different types of friction?
Explain (i) Angle of repose with a Neat diagram
(ii) Impending Motion and Limiting Friction
Lets assume that a block has been kept on a rough floor. We started applying a variable force "F" (assume that the force is being increased) on the block. Draw the graph of Frictional force (Y axis) vs Applied Force (X axis) !
Also tell the peculiar change observed in the latter part of the graph !
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Chapter 33 Solutions
Manufacturing Engineering & Technology
Ch. 33 - What is tribology?Ch. 33 - Explain what is meant by (a) surface texture and...Ch. 33 - List and explain the types of defects typically...Ch. 33 - Define the terms (a) roughness, and (b) waviness.Ch. 33 - Explain why the results from a profilometer are...Ch. 33 - Prob. 6RQCh. 33 - List the types of wear generally observed in...Ch. 33 - Define the terms wear, friction, and lubricant.Ch. 33 - How can adhesive wear be reduced? Abrasive wear?Ch. 33 - Prob. 10RQ
Ch. 33 - Explain the functions of a lubricant in...Ch. 33 - Prob. 12RQCh. 33 - Prob. 13RQCh. 33 - Describe the factors involved in lubricant...Ch. 33 - Prob. 15RQCh. 33 - Prob. 16QLPCh. 33 - Explain the significance of the fact that the...Ch. 33 - Prob. 18QLPCh. 33 - Explain why identical surface-roughness values do...Ch. 33 - Prob. 20QLPCh. 33 - Prob. 21QLPCh. 33 - Prob. 22QLPCh. 33 - Prob. 23QLPCh. 33 - Comment on the surface roughness of various parts...Ch. 33 - Prob. 25QLPCh. 33 - Do the same as for Problem 33.25, but for surface...Ch. 33 - Describe your observations regarding Fig. 33.7.Ch. 33 - Give the reasons that an originally round specimen...Ch. 33 - Prob. 29QLPCh. 33 - Explain the reason that the abrasive-wear...Ch. 33 - Prob. 31QLPCh. 33 - List the similarities and differences between...Ch. 33 - Explain why the types of wear shown in Fig. 33.11...Ch. 33 - List the requirements of a lubricant.Ch. 33 - List manufacturing operations in which high...Ch. 33 - List manufacturing operations in which high wear...Ch. 33 - Prob. 37QLPCh. 33 - Prob. 38QTPCh. 33 - A surface with a triangular sawtooth roughness...Ch. 33 - List the steps you would follow if you wished to...Ch. 33 - Discuss the tribological differences between...Ch. 33 - Section 33.2 listed major surface defects. How...Ch. 33 - Describe your own thoughts regarding biological...Ch. 33 - Prob. 48SDPCh. 33 - Prob. 49SDPCh. 33 - Prob. 50SDPCh. 33 - Describe your thoughts on the desirability of...
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- Hellp with thisarrow_forwardA hard metal ball of 10mm diameter is slid across a soft metal surface and produces a groove of3mm width. The interfacial shear strength is one-tenth of the bulk shear strength of the softermetal. For an experimentally measured coefficient of friction of 0.45 for the contact, calculatethe percentage contribution of adhesive and ploughing components to the total coefficient offriction.arrow_forward. What are the advantages and disadvantages of hot deformation as compared to cold deformationarrow_forward
- A 1-in diameter hole is to be punched through a 1/8-in thick annealed titanium-alloy Ti-6Al-4V (grade 5, annealed) sheet at room temperature. Estimate the force required for the punching operation. Show your work and list any values you reference/use. Hint: Use the equation F=T*L*Shear Strengtharrow_forward7. A strip of annealed low-carbon steel (K = 528 MPa, n = 0.25) is rolled from its initial dimensions (210 mm wide and 13 mm thick) to a thickness of 7 mm. The rollers have a radius of 250 mm, the roller rotates at 200 rpm, and u = 0.1. Compare this high frictional force and power with the low frictional (u = 0) forces and power. a. Estimate the roll force and power required for this process.arrow_forwardExplain EXTERNAL WORK AND STRAIN ENERGY?arrow_forward
- In a rolling operation using a roll of diameter 1.5 m, if a 35 mm thick plate cannot be reduced to less than 12 mm in a single pass then calculate the coefficient of friction btween the rolls and the plate.arrow_forwardA 42mm thick low carbon steel plate is reduced to 34mm in one rolling pass. At the same time that the thickness is reduced, the plate is widened by 4%. The elastic limit of the steel plate is 174MPa and its resistance is 290MPa. The input speed of the plate is 15m/min. The radius of the cylinder is 52.8mm and the rotation speed is 49 revolutions per minute. Determine: a) The minimum coefficient of friction that will make this rolling operation possible. b) The output speed of the plate c) Slide forwardarrow_forwardCould I please get some help with this problem and the key concepts, please and thank youarrow_forward
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