EBK MANUFACTURING ENGINEERING & TECHNOL
7th Edition
ISBN: 9780100793439
Author: KALPAKJIAN
Publisher: YUZU
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Chapter 33, Problem 44SDP
List the steps you would follow if you wished to reduce friction in a manufacturing process.
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List and describe two (2) situations in which conceptual (qualitative) and numerical descriptions of friction are relevant in Mechanical Engineering
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Manufacturing Processes
Explain the causes of lay on surfaces.
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Chapter 33 Solutions
EBK MANUFACTURING ENGINEERING & TECHNOL
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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- Please solve no 4 (engineering tribology)arrow_forward1) What is the difference between kinetic and static friction? 2) What is the effect of static coefficient between two surfaces wood and steel? discuss it carefully by step.arrow_forward2) Drawing: A round rod of annealed 302 stainless steel (K = 1300 MPa and n = 0.3) is being drawn from a diameter of 15 mm to a diameter of 12 mm at a speed 0.25 m/s, using a semidie angle of 8º. a. Calculate the percentage reduction, the applied force due to ideal deformation, friction, and inhomogeneous deformation. Assume coefficient of friction of 0.1. b. Calculate the required power, process efficiency, and the die pressure at the exit.arrow_forward
- A cylindrical workpiece of 100mm diameter and 150mm in height (Fig. 1) is upset (open die forged) at 1200° C to 100mm height disk (Fig. 2). Material of the workpiece is low carbon steel. A graphite lubricant reduces the friction to u=0.25. A press with 2-m/sec speeds is used to make this part. At 1200° C the material has the values for its C=48MPA and m=0.08 parameters Fig. 1 Height=150mm, Diameter=100mm Fig. 2 Height = 100mm, Diamete = ? mm (a) (b) (c) Determine the final diameter of the disk (see Fig. 2) Determine the true strain rate at the end of process. Calculate the flow stress at the end of the stroke.arrow_forwardWhat are the important factors to take into consideration when solving problems related to friction (Dry or Coulomb friction)?arrow_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
- Please give answers to both of these parts, thanks (a) Manufacturing is “ the transformation of materials into items of greater value by means of one or more processing and/or assembly operations”. Elaborate on this statement (b) It is not possible to conduct a rolling process without friction. Explain this statement.arrow_forwardExplain (i) Angle of repose with a Neat diagram (ii) Impending Motion and Limiting Frictionarrow_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_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_forwardPropose a suitable machine and drive system for a paper industry. Also explain various factors to be considered for selection of machine for a particular industry?arrow_forwardQ1: 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_forward
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