Manufacturing Engineering & Technology
7th Edition
ISBN: 9780133128741
Author: Serope Kalpakjian, Steven Schmid
Publisher: Prentice Hall
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Textbook Question
Chapter 15, Problem 30QLP
How would you prepare the end of a wire in order to be able to feed it through a die so that a drawing operation can commence?
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A drawing operation is used to form a cylindrical cup with inside diameter of 75 mm and height of 50 mm. The starting blank size is 140 mm and the stock thickness is 2.4 mm.
Based on the data, is the operation feasible?
It 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?
what is Deep Drawing?
Chapter 15 Solutions
Manufacturing Engineering & Technology
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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- In which of the following forming operations, the workpiece is pulled through a die resulting in reduction of area? a. Wire drawing O b. Rolling O c. Extrusion d. Deep drawingarrow_forwardIn a two stage wire drawing operation, the fractional reduction (ratio of change in cross- sectional area to initial cross-section area) in the first stage is 0.4. The fractional reduction in the second stage is 0.3. determine the overall fraction of the operation.arrow_forwardI need the answer as soon as possiblearrow_forward
- How long does the Forging process take?arrow_forwardIdentify the type of forming process in which the material is required to pass repeatedly through dies of different size. a. Drop forging process b. Wire drawing process c. Rolling process d. Extrusion procesarrow_forwardWhich of the following operations are closely related to open-die forging: Select one: a. Coining b. Hobbing c. Upsetting d. Flashless forgingarrow_forward
- Which defect arises due to small Punch force in sheet drawing operations? O Tearing O Wall wrinkling O Flange wrinkling Earingarrow_forwardWhat is the difference between plate and sheet material?arrow_forward1. What types of drawing process? 2. What are the Defects in cold drawn products? 3. What advantages of hot extrusion? 4. What disadvantages of cold extrusion? 5. What is the principle of the formation process? 6. Rolling is classified according to the temperature of the metal rolled:arrow_forward
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