Manufacturing Engineering & Technology
7th Edition
ISBN: 9780133128741
Author: Serope Kalpakjian, Steven Schmid
Publisher: Prentice Hall
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Chapter 17, Problem 21QLP
Explain why the
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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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- What are the characteristics and mechanical properties of PMMA? Is PMMA a thermoplastic or thermoset polymer?arrow_forwardBriefly explain how each of the following influences the tensile or yield strength of a semicrystalline polymer and why: (a) Molecular weight (b) Degree of crystallinity (c) Deformation by drawingarrow_forwardwhich is correct? 0.20 , 0.80, 2.00, 0.25arrow_forward
- An injection molded polyethylene part has a dimension of 6.25 cm. A new material, polycarbonate, is used in the same mold. What is the expected corresponding dimension of the polycarbonate molding?arrow_forwardwhat is specific strength? why fibers have very high specific strength?arrow_forwardThermal plastics are stronger than thermoset plastics.arrow_forward
- Explain why the fatigue life (Nf) of a polymer specimen should decrease with increasing frequency.arrow_forwardDifferentiate thermoplastics and thermosetting plastics with example materials .arrow_forwardViscosity is an important property of a polymer melt in plastics shaping processes. Upon what parameters does viscosity depend?arrow_forward
- The use and applications of plastics in our everyday life cannot be denied. Identify and discuss three specific properties of plastics that has led to their applications in the following fields: (i) Construction (ii) Transportarrow_forward(b) Which of the following plastic and composite materials processing is most suitable for the application of polymer automotive body panel? Explain how the selected manufacturing process selected can be used to produce the product shown in Figure 1.2 below • Injection Moulding • Reaction injection Moulding (RIM) • Blow Moulding • Rotational Moulding • Thermoforming • Compression Moulding (CM) • Transfer Moulding (TM) • Casting • Foam Moulding SULIT SULIT (BMCG 2323) Figure 1.2 Example of polymer automotive body panelarrow_forwardAn extruder barrel has a diameter of 110 mm and a length of 3.0 m. The screw channel depth = 7.0 mm, and its pitch = 95 mm. The viscosity of the polymer melt is 105 Pa-s, and the head pressure in the barrel is 4.0 MPa. What rotational speed of the screw is required to achieve a volumetric flow rate of 90 cm3/s?arrow_forward
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