EBK MANUFACTURING ENGINEERING & TECHNOL
7th Edition
ISBN: 8220100793431
Author: KALPAKJIAN
Publisher: PEARSON
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Chapter 15, Problem 26QLP
Comment on the significance of metal flow patterns shown in Fig. 15.6.
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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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- In a sheet metal forming press, the shape to be formed is hemispherical cup of radius 15 cm in 2mm thick mild steel sheet. The force required to deform sheet is 8 kN. The forming hammer should approach job from a distance of 30 cm. The production rate required is 240 components/hr. Calculate and suggest the following specifications of the various hydraulic components used: a. Hydraulic cylinder (bore & length); b. Pump pressure and flow rate; c. Electric motor HP considering 75% pump efficiency; d. Reservoir size; and e. Size of pump inlet and discharge tubing.arrow_forwardExplain the importance of lubrication in wire drawingarrow_forwardExplain why friction is undesirable in metal forming operations.arrow_forward
- Please use computer writing . And explain every things .arrow_forward• In a sheet metal forming press the shape to be formed is hemispherical cup of radius 15 cm in 2mm thick mild steel sheet. The force required to deform sheet is 8 kN. The forming hammer should approach job from a distance of 30 cm. The production rate required is 240 components/hr. Calculate and suggest the following specifications of the various hydraulic components used: a) Hydraulic cylinder (bore & length) b) Pump pressure and flow rate c) Electric motor HP considering 75% pump efficiency d) Reservoir size e) Size of pump inlet and discharge tubingarrow_forward4) Make a summary of the types of defects found in sheet-metal forming processes, and include brief comments on the reason(s) for each defect.arrow_forward
- A cup of internal diameter 80 mm and height 45 mm is to be drawn from a sheet metal 2 mm thick. Four blank sizes are available for the operation. You want to ensure the blank is large enough to make the required cup height while minimizing the material waste. Calculate the starting blank diameter for this operation?arrow_forwardAn aluminum oxide cutting tool will be produced. Would you produce it by casting? If you don't agree, please explain your reasoning and suggest a production method.arrow_forwardplease answer to both of these parts of the question, thanks (a) Explain the advantage of corner radii of punch and die in Sheet Metal Drawing Process. (b) Explain the disadvantages of Tube Drawing process in which mandrel is not used.arrow_forward
- Question 2. It is reduced to 80 mm with forging by stacking a part with a height of 120 mm and a diameter of 75 mm. The friction coefficient between the workpiece and the mold is 0.13. The flow curve of the workpiece is defined by a strength coefficient of 165 MPa and a ping-top of 0.24. Calculate the force during the process at the moments given below and obtain the force-workpiece height graph (1) as soon as it reaches the flow point (flow unit shape change = 0.002), (2) height h = 115 mm, (3) height h = 110 mm, (4) height h = 105 mm, (5) height h = 100 mm, (6) height h = 95 mm, (7) height h = 90 mm, (8) height h = 85 mm, (9) height h = 80 mm,arrow_forwardList the types of forming. Your listing should be based on workpiece temperature. Write down only three advantages per each type.arrow_forwardHow can we possibly measure the drawability of sheet metal ?arrow_forward
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