Manufacturing Engineering & Technology
7th Edition
ISBN: 9780133128741
Author: Serope Kalpakjian, Steven Schmid
Publisher: Prentice Hall
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Chapter 34, Problem 38SDP
The shot-peening process can be demonstrated with a ball-peen hammer (in which one of the heads is round). Using such a hammer, make numerous indentations on the surface of a piece of aluminum sheet (a) 2 mm and (b) 10 mm thick, respectively, placed on a hard flat surface such as an anvil.
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After a machinist quickly slips a hot, snugly fitting iron ring over a very cold brass cylinder, the two cannot be separated intact. Can you explain why this is so?
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.
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(i) Determine the Force applied on an aluminum specimen subjected to Brinell hardness
test. If the surface area is 34 mm². Take, Brinell hardness number as 1234.
(ii)
& indenter diameter on a work piece.
Draw a neat diagram of Brinell hardness test to show the applied force, indentation
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_forwardIn a metal forming industry, you are assigned to setup an equipment which is required to reduce the cross section of a bar from a 100x50mm into 75x25 mm.i. Identifythetypeoftechniqueinvolvedinthisprocess. ii. Explaintheprocesswithaneatdiagram.iii. Justifythereasonfortheselectionofthisprocess.arrow_forwardWhen deforming metal at room temperature, what kind of forging will you prefer?arrow_forward
- SHOW YOUR COMPLETE SOLUTIONarrow_forward(i)Determine the Force applied on an aluminum specimen subjected to Brinell hardness test. If the surface area is 34 mm2. Take, Brinell hardness number as 1234.(ii) Draw a neat diagram of Brinell hardness test to show the applied force, indentation & indenter diameter on a work piece.arrow_forwardin the diagram below, which one of the temperatures cannot be used for hot metal forming?arrow_forward
- Answer detailly 7(i)arrow_forwardA cylindrical brass rod with a minimum tensile strength of 450 MPa, a ductility of at least 13% EL (elongation), and a final diameter of 12.7mm is required. You have in your inventory some 19.0mm diameter brass stock that has been cold worked to 35%. Assuming that the cross section of the rod is still circular after being cold worked, and that brass experiences cracking at 65% CW, describe the necessary working steps in order to achieve the final product. Take the expression for % cold work to be = (Ao - Af)/ Ao x 100%, where Ao and Af are the original and final circular cross-sectional areas of the rod.arrow_forwardDescribe the function of a double-acting cylinder. Which differences between advancing and retracting the cylinder need to be taken into consideration.arrow_forward
- Example Problem-2 A cylindrical rod of non cold-worked brass having an initial diameter of 6.4 mm (0.25 in.) is to be cold worked by drawing such that the cross-sectional area is reduced. It is required to have a cold-worked yield strength of at least 345 Mpa (50,000 psi) and a ductility in excess of 20%EL; in addition, a final diameter of 5.1 mm (0.20 in.) is necessary. Describe the solution.arrow_forwardDescribe the Castigliano's Theorem?arrow_forwardA blank workpiece with 200 mm diameter is to be blanked from 3.2- mm-thick half-hard stainless steel (ultimate tensile strength of 650 MPa). Find (a) the diameters of blank die and punch, and (b) blanking force.arrow_forward
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