EBK MANUFACTURING ENGINEERING & TECHNOL
7th Edition
ISBN: 8220100793431
Author: KALPAKJIAN
Publisher: PEARSON
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Chapter 15, Problem 33QLP
Occasionally, steel wire drawing will take place within a sheath of a soft metal, such as copper or lead. What is the purpose of this sheath?
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Chapter 15 Solutions
EBK MANUFACTURING ENGINEERING & TECHNOL
Ch. 15 - How does extrusion differ from rolling and...Ch. 15 - Explain the difference between extrusion and...Ch. 15 - What is a spider die? What is it used for?Ch. 15 - Why are wires sometimes drawn in bundles?Ch. 15 - What is a dead-metal zone?Ch. 15 - Define the terms (a) cladding, (b) dummy block,...Ch. 15 - Why is glass a good lubricant in hot extrusion?Ch. 15 - What types of defects may occur in (a) extrusion...Ch. 15 - Describe the difference between direct and reverse...Ch. 15 - What is land? What is its function in a die?
Ch. 15 - How are tubes extruded? Can they also be drawn?...Ch. 15 - Prob. 12RQCh. 15 - What is the difference between piping and...Ch. 15 - What is impact extrusion?Ch. 15 - What is the pipe defect in extrusion?Ch. 15 - List the similarities and differences between...Ch. 15 - Explain why extrusion is a batch, or...Ch. 15 - The extrusion ratio, die geometry, extrusion...Ch. 15 - Explain why cold extrusion is an important...Ch. 15 - What is the function of a stripper plate in impact...Ch. 15 - Explain the different ways by which changing the...Ch. 15 - Glass is a good lubricant in hot extrusion. Would...Ch. 15 - How would you go about avoiding center-cracking...Ch. 15 - Table 15.1 gives temperature ranges for extruding...Ch. 15 - Will the force in direct extrusion vary as the...Ch. 15 - Comment on the significance of metal flow patterns...Ch. 15 - In which applications could you use the type of...Ch. 15 - What is the purpose of the land in a drawing die?...Ch. 15 - Can spur gears be made by (a) drawing and (b)...Ch. 15 - How would you prepare the end of a wire in order...Ch. 15 - What is the purpose of a dummy block in extrusion?...Ch. 15 - Describe your observations concerning Fig. 15.9.Ch. 15 - Occasionally, steel wire drawing will take place...Ch. 15 - Explain the advantages of bundle drawing.Ch. 15 - Under what circumstances would backward extrusion...Ch. 15 - Why is lubrication detrimental in extrusion with a...Ch. 15 - In hydrostatic extrusion, complex seals are used...Ch. 15 - Describe the purpose of a container liner in...Ch. 15 - Estimate the force required in extruding 7030...Ch. 15 - Assuming an ideal drawing process, what is the...Ch. 15 - Prob. 41QTPCh. 15 - Calculate the extrusion force for a round billet...Ch. 15 - Prob. 43QTPCh. 15 - A round wire made of a perfectly plastic material...Ch. 15 - Assume that the summary to this chapter is...Ch. 15 - Prob. 47SDPCh. 15 - Figure 15.2 shows examples of discrete parts that...Ch. 15 - The parts shown in Fig. 15.2 are economically...Ch. 15 - Survey the technical literature, and explain how...Ch. 15 - Prob. 51SDPCh. 15 - List the processes that are suitable for producing...
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- (4) The average flow stress is the flow stress multiplied by which of the following factors: (a) n, (b) (1-n), (c) 1/n, or (d) 1/(1+n), where n is the strain hardening exponent? (5) The strength of a brazed joint is typically (a) equal to, (b) stronger than, or (c) weaker than soldered joint? (6) Thread cutting operation is normally performed on which one of the following machine tools: (a) drill press, (b) lathe, (c) milling machine, (d) planer, or (e shaper? (7) Of the following cutting conditions, which one has the greatest effect on cutting temperature: (a) cutting speed, (b) depth of cut, or (c) feed? (8) The maximum possible draft in a rolling operation depends on which of the following parameters (two correct answers): (a) coefficient of friction, (b) roll diameter, (c) roll velocity, (d) stock thickness, (e) strainarrow_forwardCorrect and complete solution please don't copyarrow_forwardi need the answer quicklyarrow_forward
- What is the general equation for bending?arrow_forwardIt is proposed to use an axisymmetric drawing operation to reduce the diameter of a cylindrical rod of steel from Do to Do/4. If the steel behaves like a perfectly-plastic material, and there is no redundant deformation or friction in the process, what is the minimum number of drawing stages needed to obtain this reduction?arrow_forwardCalculate the percent cold reduction after cold rolling 0.050-in.-thick stainless steel sheet to 0.029 in.arrow_forward
- i need the answer quicklyarrow_forwardCircles of a metal are being punched that will be later stamped into coins. The metal has a shear strength of 32,575 psi. The sheets are 2.1 mm thick. The coin blanks are to be 16.5 mm in diameter. If sheet of metal is expected to produce 50 coin blanks, how much force is required to punch the sheets?arrow_forwardBoth extrusion and bar drawing processes can be used to reduce the cross section. What can be the basic differences between extrusion and bar drawing processes? Also discuss briefly why must the drawing stress never exceed the yield strength of the work metal?arrow_forward
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