EBK MANUFACTURING ENGINEERING & TECHNOL
7th Edition
ISBN: 8220100793431
Author: KALPAKJIAN
Publisher: PEARSON
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Chapter 30, Problem 43QLP
Describe your observations concerning Fig. 30.20.
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1. In the manufacture of automotive-body panels from carbon-steel sheet, stretcher strains (Lueders
bands) are observed, which detrimentally affect surface finish. How can stretcher strains be
eliminated? Explain with appropriate sketches. Also discuss how wrinkles in a deep drawing operation
can be eliminated.
Chapter 30 Solutions
EBK MANUFACTURING ENGINEERING & TECHNOL
Ch. 30 - Describe fusion as it relates to welding...Ch. 30 - Explain the features of neutralizing, reducing,...Ch. 30 - What is stick welding?Ch. 30 - Explain the basic principles of arc-welding...Ch. 30 - Why is shielded metal-arc welding a commonly...Ch. 30 - What keeps the weld bead on a steel surface...Ch. 30 - Describe the functions and characteristics of...Ch. 30 - What are the similarities and differences between...Ch. 30 - What properties are useful for a shielding gas?Ch. 30 - What are the advantages to thermit welding?
Ch. 30 - Explain where the energy is obtained in...Ch. 30 - Explain how cutting takes place when an...Ch. 30 - What is the purpose of flux? Why is it not needed...Ch. 30 - What is meant by weld quality? Discuss the...Ch. 30 - How is weldability defined?Ch. 30 - Why are welding electrodes generally coated?Ch. 30 - Describe the common types of discontinuities...Ch. 30 - Prob. 18RQCh. 30 - Explain why hydrogen welding can be used to...Ch. 30 - Prob. 20RQCh. 30 - Prob. 21QLPCh. 30 - It has been noted that heat transfer in gas-metal...Ch. 30 - Explain why some joints may have to be...Ch. 30 - Describe the role of filler metals in welding.Ch. 30 - List the processes that can be performed with...Ch. 30 - What is the effect of the thermal conductivity of...Ch. 30 - Describe the differences between oxyfuel-gas...Ch. 30 - Could you use oxyfuel-gas cutting for a stack of...Ch. 30 - What are the advantages of electron-beam and...Ch. 30 - Describe the methods by which discontinuities...Ch. 30 - Explain the significance of the stiffness of the...Ch. 30 - Prob. 32QLPCh. 30 - Which of the processes described in this chapter...Ch. 30 - Prob. 34QLPCh. 30 - Prob. 35QLPCh. 30 - Comment on the factors involved in electrode...Ch. 30 - Prob. 38QLPCh. 30 - Prob. 39QLPCh. 30 - Prob. 40QLPCh. 30 - Prob. 41QLPCh. 30 - What is weld spatter? What are its sources? How...Ch. 30 - Describe your observations concerning Fig. 30.20.Ch. 30 - Prob. 44QLPCh. 30 - Plot the hardness in Fig. 30.20d as a function of...Ch. 30 - A welding operation will take place on carbon...Ch. 30 - In Fig. 30.26b, assume that most of the top...Ch. 30 - A welding operation takes place on an...Ch. 30 - An arc welding operation is taking place on carbon...Ch. 30 - Comment on workpiece size and shape limitations...Ch. 30 - Arc blow is a phenomenon where the magnetic...Ch. 30 - Review the types of welded joints shown in Fig....Ch. 30 - Comment on the design guidelines given in...Ch. 30 - Prob. 55SDPCh. 30 - Prob. 56SDPCh. 30 - Make a list of welding processes that are suitable...Ch. 30 - Prob. 58SDPCh. 30 - Prob. 59SDPCh. 30 - Review the poor and good joint designs shown...Ch. 30 - In building large ships, there is a need to weld...Ch. 30 - Prob. 62SDPCh. 30 - Comment on whether there are common factors...Ch. 30 - Prob. 64SDPCh. 30 - Lattice booms for cranes are constructed from...Ch. 30 - A common practice in repairing expensive broken...
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- Identify the defects and remedial actions in welding and casting process. Moreover, how rolling and forging defects can be removed effectively?arrow_forwardIdentify the difference between a circular and a flat knitting needles..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_forward
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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_forwardDescribe the series of box passes applied to hot rolled blooms to obtain square or round sections.arrow_forwardList the materials that can give off dangerous fumes during welding and require forced ventilation.arrow_forward
- describe the effect that tempering has on material propertiesarrow_forwardA pipe can be manufactured as (a) seamless (cold rolled and extruded) or (b) hot rolled and welded. (i) Describe the process for manufacturing each type of pipe: (a) Seamless (cold rolled and extruded) pipe; (b) Hot rolled and welded pipe. (ii) Why might a cold rolled seamless pipe be better suited to drilling operations than a hot rolled and welded pipe? A particle reinforced composite (containing flakes) has particles evenly distributed throughout the matrix where the rule of mixtures applies. (i) State THREE effects that a larger volume of carbon particles within the matrix produces. A drill bit is a cutting tool on the end of a rotary subsea drill. A Thermally Stable Polycrystalline (TSP) drill bit can be used to drill a subsea well. TSP bits are man-made polycrystalline structures consisting of a multitude of synthetic diamond crystals sintered together at high pressure and temperature, used to aid cutting into hard rock formations. (i) Describe THREE reasons why this type…arrow_forward1. Wire drawing is cold working process use to decrease the dimeter of wire. A) Explain the process. B) Discuss the effect of this process on mechanical properties in'details? Sketch to illustrate your explanation. 2. Name and explain a manufacturing process of making open end wrench? 3. How can you decided whether to use a cold work or hot work processes? 4. Briefly explain arc welding and oxyacetylene welding? ( 5. Submerged arc welding is suitable for non-ferrous metals. YES, OR NO, AND EXPALIN WHY? 6. Briefly explain powder metallurgy (P/M)? 7. What is flux in welding. What is the main purpose of using it? . 8. Name and explain a method used to measure particle size of powder, especially if you have variety of sizes?( 9. Briefly explain the metallurgy of welding. Sketch it?arrow_forward
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