Manufacturing Engineering & Technology
7th Edition
ISBN: 9780133128741
Author: Serope Kalpakjian, Steven Schmid
Publisher: Prentice Hall
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Textbook Question
Chapter 17, Problem 29QLP
In Fig. 17.12, it can be seen that the pressure is not uniform across the diameter of the compact at a particular distance from the punch. What is the reason for this variation?
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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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- An extrusion operation is used to produce a parison whose mean diameter = 27 mm. The inside and outside diameters of the die that produced the parison are 18 mm and 22 mm, respectively. If the minimum wall thickness of the blow-molded container is to be 0.40 mm, what is the maximum possible diameter of the blow mold?arrow_forwardA thin steel disk of an oil separator of 100mm outside diameter is shrunk onto a solid steel shaft of 20mm diameter. The system is to be designed to make sure the disc does not become loose at speeds lower than 100000rev/min. Determine the shrinkage allowance required in order to avoid separation disc and shaft, at a speed of 100000rev/min. For the material assume a Young's Modulus, Poisson Ratio and density of 210GPa, 0.3 and 7850kg/m³ respectively.arrow_forwardA round slug 10 mm in diameter and made of a metal with average flow stress 300 MPa is reduced to a final diameter of 7 mm by cold extrusion. Estimate the force on the punch.arrow_forward
- A bearing of simple geometry is to be pressed out of bronze powders, using a compacting pressure of 240 MPa. Outside diameter of the bearing 45mm, inside diameter 20 mm, and length 18 mm. What is the required press tonnage to perform this operation? Whole number answer.arrow_forwardWrite a detail note on direct extrusion process.arrow_forwardA typical plastic shopping bag made by blown film has a lateral dimension (width) of 550 mm. Assume the tube is expended from 1.5 to 2.5 times the extrusion die diameter. Calculate the extrusion die diameter size.arrow_forward
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- 8arrow_forwardReview Problems The extrusion die for a polyethylene parison used in blow molding has a mean diameter of 18.0 mm. The size of the ring opening in the die is 2.0 mm. The mean diameter of the parison is observed to swell to a size of 21.5 mm after exiting the die orifice. If the diameter of the blow molded container is to be 150 mm, determine (a) the corresponding wall thickness of the container and (b) the wall thickness of the parison.arrow_forwardDescribe the defects found on the injection/ compression moulded parts with different temperatures or time setting. Discuss the possible causes for each case.arrow_forward
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