Manufacturing Engineering & Technology
7th Edition
ISBN: 9780133128741
Author: Serope Kalpakjian, Steven Schmid
Publisher: Prentice Hall
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Textbook Question
Chapter 17, Problem 54SDP
The axisymmetric parts shown in Fig. P17.54 are to be produced through PM. Describe the design changes that you would recommend.
FIGURE P17.54
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QUESTION 1
(a)
Powder Metallurgy (PM) has become competitive with processes such as casting,
forging and machining, particularly for complex parts made of high strength and hard
alloys. Compare the design considerations for products made of powder metallurgy,
casting and forging process. Evaluate your observation.
(b)
Products made of sheet metals can be easily found around us. Identify some of the
products in your automobile which are made from sheet metal, and discuss the process
or combination of processes required to produce such products.
Use brief sentences, sketches or calculations to answer the following questions:
What were the main needs to develop colloidal technique for powder processing, explain your arguments clearly?
Chapter 17 Solutions
Manufacturing Engineering & Technology
Ch. 17 - Describe briefly the production steps involved in...Ch. 17 - Name the various methods of powder production and...Ch. 17 - Explain why metal powders may be blended.Ch. 17 - Describe the methods used in metal powder...Ch. 17 - What is isostatic pressing? How is it different...Ch. 17 - What hazards are involved in PM processing?...Ch. 17 - Describe what occurs to metal powders during...Ch. 17 - Prob. 8RQCh. 17 - Why might secondary and finishing operations be...Ch. 17 - Prob. 10RQ
Ch. 17 - Prob. 11RQCh. 17 - Prob. 12RQCh. 17 - Prob. 13RQCh. 17 - What is screening of metal powders? Why is it...Ch. 17 - Why are protective atmospheres necessary in...Ch. 17 - Why is there density variation in the compacting...Ch. 17 - What is the magnitude of the stresses and forces...Ch. 17 - List the similarities and differences of forging...Ch. 17 - Give some reasons that powder-injection molding is...Ch. 17 - How does the equipment used for powder compaction...Ch. 17 - Explain why the mechanical and physical properties...Ch. 17 - What are the effects of the different shapes and...Ch. 17 - Describe the relative advantages and limitations...Ch. 17 - How different, if any, are the requirements for...Ch. 17 - The powder metallurgy process can be competitive...Ch. 17 - What are the reasons for the shapes of the shown...Ch. 17 - Should green compacts be brought up to the...Ch. 17 - Because they undergo special processing, metal...Ch. 17 - In Fig. 17.12, it can be seen that the pressure is...Ch. 17 - Why do the compacting pressure and the sintering...Ch. 17 - What will be stronger: a blend of stainless steel...Ch. 17 - Name the various methods of powder production and...Ch. 17 - Estimate the maximum tonnage required to compact a...Ch. 17 - Refer to Fig. 17.11a. What should be the volume of...Ch. 17 - Determine the shape factors for (a) a cylinder...Ch. 17 - Estimate the number of particles in a 500-g sample...Ch. 17 - Prob. 37QTPCh. 17 - A coarse copper powder is compacted in a...Ch. 17 - A gear is to be manufactured from iron powders. It...Ch. 17 - What volume of powder is needed to make the gear...Ch. 17 - The axisymmetric part shown in Fig. P17.41 is to...Ch. 17 - Prepare an illustration similar to Fig. 13.1,...Ch. 17 - Prob. 44SDPCh. 17 - Compare the design considerations for PM products...Ch. 17 - Prob. 46SDPCh. 17 - Prob. 47SDPCh. 17 - Using the Internet, locate suppliers of metal...Ch. 17 - Explain why powder metal parts are commonly used...Ch. 17 - Prob. 50SDPCh. 17 - Describe how the information given in Fig. 17.15...Ch. 17 - It was stated that, in the process shown in Fig....Ch. 17 - Prob. 53SDPCh. 17 - The axisymmetric parts shown in Fig. P17.54 are to...Ch. 17 - Assume you are working in technical sales. What...
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- Name the various methods of powder production and the morphology of the powders produced.arrow_forwardIn powder processing, a cylinder with a diameter of 2 inches and a height of 10 inches is to be made from fine copper powders. A single-action press is used for compaction. If the average density of the green product is 7 g/cm3 at the bottom half of the cylinder, estimate the compaction pressure at the punch surface. Assume no friction between the powders. The coefficient of friction between particles and containers is 0.2.arrow_forwardWhat are the practical applications of powder metallurgy components? List at least four items produced by powder metallurgy.arrow_forward
- What laws of thermodynamics applicable to the compression molding machine concept? Explain.arrow_forwardBriefly explain the Casting and Molding processes and define their basic requirements. If a manufacturer was asked to produce a set of plastic bottles, which method would you suggest?Justify your answer.arrow_forwardPls answer ASAP. Thanks!arrow_forward
- 2. Briefly describe one method for creating a hollow composite component. Sketch the component that you are considering. Explain what process you would use and describe all the steps, tooling and materials that are required (order is important for process steps). Describe any potential problem areas and how they could be avoided or compensated for.arrow_forwardWhat are the main parameters that influence the flow of a polymer in an extrusion process? Explain this for 3D FDM printing as well as injection moulding and discuss similarities and differences.arrow_forwardGive your hypothesis on the creation of the spinel structure and the density of the material as the sintering temperatures are increased.arrow_forward
- Explain why G-Codes (CNC programs) are used to control and fabricate the parts for the material extrusion, binder jetting and material jetting systems such as Fused Deposition Modelling (FDM); however, the G-codes are not required in the print files for the vat polymerization and powder bed fusion systems, such SLA, SLS, SLM, EBM and DLP.arrow_forwardYour die setter brings you a print of a cylinder with a 2 inch outside diameter and a 1.75 inch inside diameter. The cylinder is to be molded of iron powder with a green density of 6.8 g/cc. The apparent density of the powder is 2.9 g/cc. What is the die fill if the green part is to have a height of 2.5 inches? (show your work)arrow_forwardFor a powder binding process that mixes a 3:1 volume ratio mixture of semi-crystalline polyethylene powder with a density of 0.900 g/cm³ and crystalline polyethylene powder, what is the percent crystallinity of the manufactured parts? (The density of polyethylene in its amorphous and crystalline states is 0.870 g/cm³ and 0.998 g/cm³ respectively)arrow_forward
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