EBK MANUFACTURING ENGINEERING & TECHNOL
7th Edition
ISBN: 9780100793439
Author: KALPAKJIAN
Publisher: YUZU
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Textbook Question
Chapter 16, Problem 47QTP
Measure the respective areas of the solid outlines in Fig. 16.14a, and compare them with the areas of the original circles. Calculate the final thicknesses of the sheets, assuming that the original sheet is 1 mm thick.
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A cup of 5o mm diameter and 20 mm height is to be
produced by drawing from a 1.5 mm thick sheet metal.
What is the maximum drawing force ? If ultimate tensile
strength of metal is 650 MPa.
please 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.
A compound die is used to blank and punch a large washer out of 6061ST aluminum alloy sheet
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mm. Determine (a) the punch and die sizes for the blanking and punching operations, (b) the force
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and punching occur simultaneously and (b) the punches are staggered so that punching occurs first,
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Chapter 16 Solutions
EBK MANUFACTURING ENGINEERING & TECHNOL
Ch. 16 - How does sheet-metal forming differ from rolling,...Ch. 16 - What causes burrs? How can they be reduced or...Ch. 16 - Prob. 3RQCh. 16 - Describe the difference between compound,...Ch. 16 - Describe the characteristics of sheet metals that...Ch. 16 - Describe the features of forming-limit diagrams...Ch. 16 - List the properties of materials that influence...Ch. 16 - Give one specific application for each of the...Ch. 16 - Why do tubes buckle when bent? What is the effect...Ch. 16 - Define normal anisotropy, and explain why it is...
Ch. 16 - Describe earing and why it occurs.Ch. 16 - What are the advantages of rubber forming? Which...Ch. 16 - Explain the difference between deep drawing and...Ch. 16 - How is roll forming fundamentally different from...Ch. 16 - What is nesting? What is its significance?Ch. 16 - Describe the differences between compound,...Ch. 16 - What is microforming?Ch. 16 - Explain the advantages of superplastic forming.Ch. 16 - What is hot stamping? For what materials is it...Ch. 16 - What is springback? What is negative springback?Ch. 16 - Explain the differences that you have observed...Ch. 16 - Take any three topics from Chapter 2, and, with...Ch. 16 - Do the same as for Problem 16.22, but for Chapter...Ch. 16 - Identify the material and process variables that...Ch. 16 - Explain why springback in bending depends on yield...Ch. 16 - Explain why cupping tests may not predict well the...Ch. 16 - Identify the factors that influence the...Ch. 16 - Why are the beads in Fig. 16.36b placed in those...Ch. 16 - A general rule for dimensional relationships for...Ch. 16 - Section 16.2 stated that the punch stripping force...Ch. 16 - Is it possible to have ironing take place in an...Ch. 16 - Note the roughness of the periphery of the flanged...Ch. 16 - What recommendations would you make in order to...Ch. 16 - It has been stated that the quality of the sheared...Ch. 16 - Give several specific examples from this chapter...Ch. 16 - As you can see, some of the operations described...Ch. 16 - Through changes in clamping or die design, it is...Ch. 16 - How would you produce the part shown in Fig....Ch. 16 - It has been stated that the thicker the sheet...Ch. 16 - Prob. 41QTPCh. 16 - Calculate the value of R in Problem 16.41. Will...Ch. 16 - Estimate the limiting drawing ratio for the...Ch. 16 - Using Eq. (16.15) and the K value for TNT, plot...Ch. 16 - Section 16.5 states that the k values in bend...Ch. 16 - For explosive forming, calculate the peak pressure...Ch. 16 - Measure the respective areas of the solid outlines...Ch. 16 - Plot Eq. (16.6) in terms of the elastic modulus,...Ch. 16 - What is the minimum bend radius for a 1.0-mm-thick...Ch. 16 - Survey the technical literature and explain the...Ch. 16 - Using the data in Table 16.3 and referring to Eq....Ch. 16 - What is the force required to punch a square hole...Ch. 16 - In Case Study 16.2, it was stated that the reason...Ch. 16 - A cup is being drawn from a sheet metal that has a...Ch. 16 - Prob. 55QTPCh. 16 - Figure P16.57 shows a parabolic profile that will...Ch. 16 - Prob. 59SDPCh. 16 - Consider several shapes to be blanked from a large...Ch. 16 - Prob. 61SDPCh. 16 - Many axisymmetric missile bodies are made by...Ch. 16 - Metal cans are either two-piece (in which the...Ch. 16 - The design shown in Fig. P16.65 is proposed for a...Ch. 16 - Suggest consumer-product designs that could...Ch. 16 - How would you produce the part shown in Fig. 16.44...Ch. 16 - Using a ball-peen hammer, strike the surface of...Ch. 16 - Inspect a common paper punch and observe the shape...Ch. 16 - Obtain an aluminum beverage can and slit it in...Ch. 16 - Prob. 71SDPCh. 16 - Prob. 73SDPCh. 16 - On the basis of experiments, it has been suggested...Ch. 16 - Design a box that will contain a 4-in. 6-in. ...Ch. 16 - Repeat Problem 16.77, but design the box from a...
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- A shell of 100 mm diameter and 100 mm height with the corner radius of 0.4 mm is to be produced by cup drawing. What is the required blank diameter?arrow_forwardA 10 mm thick plate is rolled to 7 mm thick in a rolling mill using 1000 mm diameter rigid rolls. The neutral point is located at an angle of 0.3 times the bite angle from the exit. What will be the thickness of the plate at the neutral point.arrow_forward2) A washer is going to be manufactured by cutting operation out of 2024ST aluminum alloy sheet that has a thickness of 2.5 mm. The outside diameter of the washer is 25.0 mm, and the inside diameter is 12.0 mm. Make a rough sketch, define the geometries to be used and determine a. The punch and die size for the blanking operation b. The punch and die size for the punching operation c. The force required performing the blanking and punching operation simultaneously. The aluminum has a tensile strength = 300 MPa.arrow_forward
- Please answer all partsarrow_forwardQuestion 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_forwardA compound die will be used to blank and punch a large washer out of 6061ST aluminum alloy sheet stock 3.50 mm thick. The outside diameter of the washer is 50.0 mm and the inside diameter is 15.0 mm. Determine (a) the punch and die sizes for the blanking operation, and (b) the punch and die sizes for the punching operation Vallue for allowance = 0.060arrow_forward
- 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 Except that the starting blank size diameter is 160 mm, compute the drawing forceand The holding force given that the tensile strength of the sheet metal = 490MPa and (7)yield strength = 200 MPa.arrow_forwardA compound die will be used to blank and punch a large rectangle (90x150mm blank dimensions) out of 6061ST aluminum alloy sheet stock 3.5 mm thick. The diameter of inside hole is 25 mm. The aluminum sheet metal has a tensile strength 310 MPa. Determine the minimum tonnage press (force) to perform the blanking and punching operation (1) assume that blanking and punching occur simultaneously and (2) assume that punching occurs first, then blanking, Take: Ac-0.06arrow_forwardA compound die will be used to blank and punch a large washer out of 6061ST aluminum alloy sheet stock 4.50 mm thick. The outside diameter of the washer is 60.0 mm and the inside diameter is 25.0 mm. Determine the punch and die sizes for the blanking operation. Determine the force required to perform the blanking and punching operation, assuming that the punches are staggered so that punching occurs first, then blanking. The aluminum sheet metal has a tensile strength = 310 MPa. Consider a clearance allowance value of 0.060.arrow_forward
- In a wire drawing operation diameter of a steel wire is reduced from 10 mm to 8 mm. The mean flow stress of the material is 400 MPa.what is the ideal force required for drawing (ignoring friction and redundant work).?arrow_forwardQ26. Compare any ten major differences between Drawing process and Extrusion processarrow_forwardExplain the difference between deep drawing and redrawing.arrow_forward
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