Manufacturing Engineering & Technology
7th Edition
ISBN: 9780133128741
Author: Serope Kalpakjian, Steven Schmid
Publisher: Prentice Hall
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Textbook Question
Chapter 34, Problem 27QTP
Taking a simple example, such as the parts shown in Fig. 34.1, estimate the force required for roller burnishing. (Hint: See Sections 2.6 and 14.4.)
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Consider the extrusion of a cylindrical billet. Assume the billet to have a length of 0.3m and a diameter of 0.15m. This is extruded into a cylindrical product that is 0.03m in diameter and 7.5m long (a reduction ratio of 25). Neglecting the areas on the two ends, compute the ratio between the product surface area (wraparound cylinder) and the surface area of the starting billet.
How would this ratio change if the product were a square with the same cross-sectional area as that of the 0.03m diameter circle?
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Chapter 34 Solutions
Manufacturing Engineering & Technology
Ch. 34 - Explain why surface treatments may be necessary...Ch. 34 - What is shot peening? Why is it performed?Ch. 34 - What are the advantages of roller burnishing?Ch. 34 - Explain the difference between case hardening and...Ch. 34 - Describe the principles of physical and chemical...Ch. 34 - Review Fig. 34.2 and describe the principles...Ch. 34 - Prob. 7RQCh. 34 - Prob. 8RQCh. 34 - Prob. 9RQCh. 34 - Prob. 10RQ
Ch. 34 - Prob. 11RQCh. 34 - Prob. 12RQCh. 34 - Prob. 13RQCh. 34 - Prob. 14RQCh. 34 - Prob. 15RQCh. 34 - Prob. 16RQCh. 34 - Describe how roller-burnishing processes induce...Ch. 34 - Explain why some parts may be coated with...Ch. 34 - Prob. 19QLPCh. 34 - Prob. 20QLPCh. 34 - Prob. 21QLPCh. 34 - It is well known that coatings may be removed or...Ch. 34 - Make a list of the coating processes described in...Ch. 34 - Sort the coating processes described in this...Ch. 34 - Why is galvanizing important for automotive-body...Ch. 34 - Explain the principles involved in various...Ch. 34 - Taking a simple example, such as the parts shown...Ch. 34 - Estimate the plating thickness in electroplating a...Ch. 34 - Which surface treatments are functional, and which...Ch. 34 - An artificial implant has a porous surface area...Ch. 34 - If one is interested in obtaining a textured...Ch. 34 - It is known that a mirrorlike surface finish can...Ch. 34 - It has been observed in practice that a thin layer...Ch. 34 - Prob. 34SDPCh. 34 - Prob. 35SDPCh. 34 - Because they evaporate, solvents and similar...Ch. 34 - Prob. 37SDPCh. 34 - The shot-peening process can be demonstrated with...Ch. 34 - Prob. 39SDPCh. 34 - Prob. 40SDP
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- The figure below shows a symmetric plane-strain upsetting process. The process may also be thought of as a form of side extrusion. Observations show that the deformation is confined to two shear planes, each one being analogous to that seen in plane-strain cutting. You may assume that there is no friction between the work material and the tool/die walls; the uniaxial yield strength of the material is σy and is independent of strain rate and temperature, and the material behaves as a rigid plastic solid. a) Calculate the pressure (p) required for the upsetting process in terms of σy. b) If friction existed at the die walls and the frictional work (energy) dissipation was 30% of the energy required for shape change alone (part (a) above), then what would be the pressure (p)?arrow_forwardA 10 mm thick plate is rolled to 7 mm thick in a rolling mill using 1000 mm diameter rigid rolls. The neutral point is located at an angle of 0.3 times the bite angle from the exit. What will be the thickness of the plate at the neutral point.arrow_forwardExplain (i) Angle of repose with a Neat diagram (ii) Impending Motion and Limiting Frictionarrow_forward
- Forging procedures may be characterised in part by the degree to which the amount of work that can be done is restricted in the die. Give me the names of the three primary categories that result from this grouping.arrow_forward* A cylindrical workpiece made of 1100-0 Aluminum that is 18 in high and 16 in in diameter and is to be reduced in height by 25% by open-die forging. Let the coefficient of friction be 0.15. K=20 mpa,n=0.35, Calculate the forging force.arrow_forward5) Thread rolling is considered the best commercial mass production process that give higher strength threads and better fatigue resistance more than conventional machining processes of threads. 6) In explosive forming, the tank that is filled with water should be open from the top, and not closed by a sealing roof. Why?arrow_forward
- please answer to both of these parts of the question, thanks (a) Explain the advantage of corner radii of punch and die in Sheet Metal Drawing Process. (b) Explain the disadvantages of Tube Drawing process in which mandrel is not used.arrow_forwardExplain the principles of metal rolling in not more than 10 sentences.arrow_forwardConsider the extrusion of a cylindrical billet, and compute the following. Assume the starting billet to have a length of 0.3m and a diameter of 15cm. This is extruded into a cylindrical product that is 3cm in diameter and 7.5cm long. Neglecting the areas on the two ends, compute the ratio between the product surface area (wraparound cylinder) and the surface area of the starting billet. How would this ratio change if the product were a square with the same corss-sectional area as that of the 3cm diameter circle?arrow_forward
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