DeGarmo's Materials and Processes in Manufacturing
12th Edition
ISBN: 9781118987674
Author: J. T. Black, Ronald A. Kohser
Publisher: WILEY
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Chapter 19, Problem 20RQ
To determine
The difference between progressive dies and transfer dies.
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(USCS units) A part is hot forged in an impression die. The projected area of the part, including flash, = 17.3 in2. After trimming, the part has a projected area of 12.5 in2. Part geometry is complex. As heated the work metal yields at 13,000 lb/in2and no strain hardening occurs. At room temperature, the metal yields at 30,000 lb/in2. Determine the maximum force required to perform the forging operation. (use table 18.1 for Kf )
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Chapter 19 Solutions
DeGarmo's Materials and Processes in Manufacturing
Ch. 19 - What distinguishes sheet forming from bulk...Ch. 19 - What is a definition of shearing?Ch. 19 - Prob. 3RQCh. 19 - What measures can be employed to improve the...Ch. 19 - How does fineblanking create shearing in a...Ch. 19 - Prob. 6RQCh. 19 - What types of cuts are made by squaring shears?Ch. 19 - Why might a long shearing cut be made in a...Ch. 19 - What is a slitting operation?Ch. 19 - What is the difference between piercing and...
Ch. 19 - Prob. 11RQCh. 19 - Prob. 12RQCh. 19 - Prob. 13RQCh. 19 - Prob. 14RQCh. 19 - Prob. 15RQCh. 19 - Prob. 16RQCh. 19 - What is the benefit of making dies as a multipiece...Ch. 19 - Prob. 18RQCh. 19 - Prob. 19RQCh. 19 - Prob. 20RQCh. 19 - Prob. 21RQCh. 19 - Prob. 22RQCh. 19 - When making bends in sheet metal, what is the...Ch. 19 - Prob. 24RQCh. 19 - Prob. 25RQCh. 19 - Why does a metal usually become thinner in the...Ch. 19 - Prob. 27RQCh. 19 - Prob. 28RQCh. 19 - Prob. 29RQCh. 19 - What types of operations can be performed on a...Ch. 19 - Prob. 31RQCh. 19 - Prob. 32RQCh. 19 - Prob. 33RQCh. 19 - Prob. 34RQCh. 19 - What is the primary benefit of incorporating a...Ch. 19 - Prob. 36RQCh. 19 - What is the benefit of using a urethane (rubber)...Ch. 19 - What is the objective of the roll bending process?Ch. 19 - What is the role of the form block in draw bending...Ch. 19 - Prob. 40RQCh. 19 - Prob. 41RQCh. 19 - Prob. 42RQCh. 19 - Prob. 43RQCh. 19 - Prob. 44RQCh. 19 - Prob. 45RQCh. 19 - Prob. 46RQCh. 19 - Prob. 47RQCh. 19 - Prob. 48RQCh. 19 - Prob. 49RQCh. 19 - Prob. 50RQCh. 19 - Prob. 51RQCh. 19 - Prob. 52RQCh. 19 - Prob. 53RQCh. 19 - What is the distinction between shallow drawing...Ch. 19 - What is the function of the pressure ring or...Ch. 19 - Prob. 56RQCh. 19 - Prob. 57RQCh. 19 - Prob. 58RQCh. 19 - Prob. 59RQCh. 19 - Prob. 60RQCh. 19 - Prob. 61RQCh. 19 - Prob. 62RQCh. 19 - Prob. 63RQCh. 19 - Prob. 64RQCh. 19 - Prob. 65RQCh. 19 - Prob. 66RQCh. 19 - Prob. 67RQCh. 19 - Prob. 68RQCh. 19 - Prob. 69RQCh. 19 - Prob. 70RQCh. 19 - Prob. 71RQCh. 19 - Prob. 72RQCh. 19 - Prob. 73RQCh. 19 - Prob. 74RQCh. 19 - Prob. 75RQCh. 19 - What are some of the basic methods that have been...Ch. 19 - Prob. 77RQCh. 19 - Prob. 78RQCh. 19 - Prob. 79RQCh. 19 - Prob. 80RQCh. 19 - Prob. 81RQCh. 19 - What properties from a uniaxial tensile test can...Ch. 19 - How is the formability in biaxial tension...Ch. 19 - What is normal anisotropy, R and planar...Ch. 19 - Prob. 85RQCh. 19 - Prob. 86RQCh. 19 - Prob. 87RQCh. 19 - Prob. 88RQCh. 19 - What two hot�forming operations can be used to...Ch. 19 - Prob. 90RQCh. 19 - What are the primary assets and limitations of...Ch. 19 - Prob. 92RQCh. 19 - Prob. 93RQCh. 19 - What are some of the attractive features of...Ch. 19 - What are some of the common types of press frames?Ch. 19 - What are some features that may be included into a...Ch. 19 - Prob. 97RQCh. 19 - Prob. 98RQCh. 19 - Prob. 99RQCh. 19 - Prob. 100RQCh. 19 - The maximum punch force in blanking can be...Ch. 19 - Prob. 2PCh. 19 - Prob. 3PCh. 19 - What are some of the techniques for minimizing the...Ch. 19 - Prob. 5PCh. 19 - Prob. 6PCh. 19 - Prob. 1CSCh. 19 - Prob. 2CSCh. 19 - Prob. 3CSCh. 19 - Polymeric materials have characteristically low...Ch. 19 - If adhesive bonding is specified as a replacement...Ch. 19 - Which of the material/process options do you feel...Ch. 19 - Prob. 7CSCh. 19 - Prob. 8CS
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- 4. What are the advantages and limitations of using die inserts?arrow_forwardQuestion 5 5.1 Calculate the final bend radius for a 3 mm thick 6061 T6 aluminum plate that is formed using a forming punch with an 8 mm radius, as shown in Figure 3. R 8 Figure 3: Bend profile that is formed using a V-block die and a punch with a 8 mm radius 5.2 Explain why there would be a difference between the initial and final bend radius during the bending process and how this occurrence depends upon material properties, sheet thickness and the bend radius.arrow_forwardExplain steps of extrusion process in forming process?arrow_forward
- Manufacturingarrow_forwardThe quantity of work that can be done in the die may be used as a defining feature of forging processes. Please identify the following three broad classes that this sorting generates.arrow_forwardQ3: In drawing of circular rod, it is required to perform 15% reduction in cross sectional area through a tapered die. Estimate a die angle in order to assure at least 80% homogeneous deformation in produced part and then compare the current process efficiency with ideal deformation? Take C-1.08 and C-0.45.arrow_forward
- WHAT ARE THE 5 USES/APPLICATIONS OF ROLLING CONES AND ROLLING CYLINDERS?arrow_forwardChapter 18: (USCS units) Aluminium rod stick with a starting diameter = 0.50 in 5) is drawn through a draw die with an entrance angle = 13°. The final diameter of the rod is = 0.375 in. The metal has a strength coefficient = 25,000 lb/in?. and a strain-hardening exponent = 0.20. Coefficient of friction at the work-die interface = 0.1. Determine the (a) area reduction, (b) draw force for the operation, and (c) horsepower o perform the operation if the exit velocity of the stock = 5 ft/sec.arrow_forward3) A direct extrusion process is used to reduce a cylindrical part that has a diameter of 5 inch and is 10 inch long to a cylinder with 2 inch diameter. The die angle is 90°. The cylinder material has a strength coefficient of 10 ksi and strain hardening exponent Of 0.15. Determine a. Extrusion strain b. Ram forcearrow_forward
- A deep drawing operation for a cup is performed in which the inside diameter = 60 mm %3D and the height = 50 mm. The blank thickness = 3 mm, and %3D %3D the starting blank diameter = 108 mm. Punch and die radii = %3D 4 mm. Tensile strength = 400 MPa and yield strength = 180 %3D MPa for this sheet metal. Determine (a) drawing ratio, (b) reduction, (c) drawing force, and (d) blankholder force. *arrow_forwardfollowing figure. What is the liners function in reverse extrusion? Container A- Describe the purpose of a container liner in direct extrusion, as shown in the Container liner - Pressing stem Billet Die. Die backer, Dummy block B- Estimate the force required in extruding 70-30 brass at 700 C if the billet diameter is 200 mm and the extrusion ratio is 30. Use the following figure. Extrusion 800 1000 1200 1400 600 400 80 Stainless steel Beryllium 400 60 70-30 Brass Cold-rolled Copper 200 steel 20 1100 Aluminum 2500 2000 1500 1000 Temperature ("F) Chromit Molybdenum Extrusion constant, k (10° psi) MPaarrow_forwardYou have been asked to work on some design problems and technically support the team working on extrusion and forging operations: 1) The team are extruding a billet that is 80 mm long with diameter of 40 mm is directly to a diameter of 20 mm. The extrusion die has a die angle of 75°, see Figure 1. For the work metal, K = 600 MPa and n = 0.25. In the Johnson extrusion strain equation, a = 0.8 and b = 1.4. Remaining billet length 75 Ram pressure, p D. Dr Figure 1: Extrusion process. Determine the following design parameters: (a) Extrusion ratio. (b) True strain (homogeneous deformation). (c) Extrusion strain. (d) Ram pressure at L= 80, 40, and 10 mm. (e) Draw the relationship between the ram pressure and billet length and discuss the results. What are your recommendations to dccrcase the required ram pressure?arrow_forward
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