Manufacturing Engineering & Technology
7th Edition
ISBN: 9780133559897
Author: KALPAKJIAN
Publisher: PEARSON
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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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With suitable sketches of the relationship of friction force and applied load, briefly explain the concept of friction force.
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What is Limiting Friction? Describe it with some real case example.
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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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, mechanical-engineering and related others by exploring similar questions and additional content below.Similar questions
- Explain why friction is undesirable in metal forming operations.arrow_forwardList manufacturing operations in which high friction is desirable and those in which low friction is desirable,arrow_forwardIn a sheet metal forming press, the shape to be formed is hemispherical cup of radius 15 cm in 2mm thick mild steel sheet. The force required to deform sheet is 8 kN. The forming hammer should approach job from a distance of 30 cm. The production rate required is 240 components/hr. Calculate and suggest the following specifications of the various hydraulic components used: a. Hydraulic cylinder (bore & length); b. Pump pressure and flow rate; c. Electric motor HP considering 75% pump efficiency; d. Reservoir size; and e. Size of pump inlet and discharge tubing.arrow_forward
- I don't know much about frictionarrow_forwardA solid cylindrical work piece is reduced in height by an open die forging process using flat dies on a mechanical press, powered by a 20 kW motor which operates at 35 strokes per minute with a stroke length of 160 mm. The work piece is 60 mm high and 100 mm in diameter and is to be reduced in height by 15%. The coefficient of friction during the operation is 0,18. Calculate the flow stress of work piece material if the press is set to operate at 90% of its maximum capacity.arrow_forwardCan you show the solution and can you provide a illustration for this problem? Thank youarrow_forward
- Discuss challenges you encounter in using Vernier caliper. Would you prefer digital caliper over manual Vernier caliper? Why? How important to know the principle of manual Vernier Caliper before using digital caliper?arrow_forwardIn 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_forwardConsider your own undertaking in the light of the one that is provided as an example in the piece, and then assess whether or not the waterfall method would be suitable for tackling it.arrow_forward
- Q1: How do your results for μs and μk compare to literature values for dry metal on plastic? Cite what you compared to. Do they agree with the literature within error? If not, discuss any systematics that could have contributed to the discrepancy. Q2: Is the force of static friction constant as the incline rises? Explain your answer. My Us value is 0.4452, and Uk value is 0.33arrow_forwardA cold rolling operation is to be used to reduce a 50 mm thick and 200 mm wide copper plate. The entering velocity of the plate is 15 m/min and the exit velocity is 18 m/min. The coefficient of friction is 0.2 and assuming that the reduction in thickness during this process is the maximum draft permissible. If the plate widens by 5% after rolling, calculate the power required to drive the rolls. Assume average flow stress of the material as 180 MPa.arrow_forwardGive a detailed explanation. Explain why fasteners, such as bolt-and-nut, used in machines operating at high temperature must be re-tightened regularly.arrow_forward
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