EBK MANUFACTURING ENGINEERING & TECHNOL
7th Edition
ISBN: 9780100793439
Author: KALPAKJIAN
Publisher: YUZU
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Chapter 5, Problem 52SDP
Referring to Fig. 5.4a, note that the mold has cooling channels incorporated to remove heat. Can continuous casting be done without such cooling channels? Can it be done with a heated mold? Explain your answer.
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a riser in the shape of a sphere is to be designed for a sand casting mold. the casting is a rectangular plate, with length 200mm, width 100mm, and thickness 18mm. if the total solidification time of the casting itself is known to be 3.5 mm, determine the diameter of the riser so that it will take 25% longer for the riser to solidify. assume a value of 2 for ‘n’ m( the exponent in chvorinov’s rule). know the volume and surface area of a sphere.
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Chapter 5 Solutions
EBK MANUFACTURING ENGINEERING & TECHNOL
Ch. 5 - What are the major categories of ferrous alloys?Ch. 5 - Prob. 2RQCh. 5 - List the basic raw materials used in making iron...Ch. 5 - List the types of furnaces commonly used in...Ch. 5 - List and explain the characteristics of the types...Ch. 5 - Prob. 6RQCh. 5 - What is continuous casting? What advantages does...Ch. 5 - What is the role of a tundish in continuous...Ch. 5 - Prob. 9RQCh. 5 - What are trace elements?
Ch. 5 - What are the percentage carbon contents of...Ch. 5 - Prob. 12RQCh. 5 - Prob. 13RQCh. 5 - Prob. 14RQCh. 5 - Prob. 15RQCh. 5 - What is high-speed steel?Ch. 5 - Prob. 17RQCh. 5 - Prob. 18RQCh. 5 - Prob. 19RQCh. 5 - What effect does carbon content have on mechanical...Ch. 5 - Identify several different products that are made...Ch. 5 - Professional cooks generally- prefer carbon-steel...Ch. 5 - Prob. 23QLPCh. 5 - Explain why continuous casting has been such an...Ch. 5 - Describe applications in which you would not want...Ch. 5 - Explain what would happen if the speed of the...Ch. 5 - The cost of mill products of metals increases with...Ch. 5 - Describe your observations regarding the...Ch. 5 - Prob. 29QLPCh. 5 - Prob. 30QLPCh. 5 - In Table 5.9, D2 steel is listed as a more common...Ch. 5 - List the common impurities in steel. Which of...Ch. 5 - Explain the purpose of the oil shown at the top...Ch. 5 - Recent research has identified mold-surface...Ch. 5 - Prob. 35QLPCh. 5 - List and explain the advantages and disadvantages...Ch. 5 - Conduct an Internet search and determine the...Ch. 5 - Refer to the available literature, and estimate...Ch. 5 - Some soft drinks are now available in steel cans...Ch. 5 - Using strength and density data, determine the...Ch. 5 - The endurance limit (fatigue life) of steel is...Ch. 5 - Using the data given in Table 5.4, obtain the...Ch. 5 - Based on the information given in Section 5.5.1,...Ch. 5 - Assume that you are in charge of public relations...Ch. 5 - Assume that you are in competition with the steel...Ch. 5 - In the past, waterfowl hunters used lead shot in...Ch. 5 - Aluminum is being used as a substitute material...Ch. 5 - In the 1940s (the Second World War), the Yamato...Ch. 5 - Search the technical literature, and add more...Ch. 5 - Referring to Fig. 5.4a, note that the mold has...
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- Which of these factors causes more porosity to form toward the interior of a casting rather than toward the outside? (a) Gasses are less soluble in the solid metal than the liquid, so solidified areas push dissolved gasses toward the interior. (b) Casting under a vacuum causes gasses near the liquid metal surface to be drawn out of the liquid during solidification. (c) The feeding structures of the mold are designed to force entrapped air into the center of the casting. (d) Draft on the mold wall forces air bubbles toward the interior of the solidifying metal. (e) None of the above Non-eutectic alloys (most commercial alloys) solidify over a temperature range. Which of the following statements explains how this affects the casting process. (a) Solidified non-eutectic alloys are especially difficult to remove from metal dies (b) Non-eutectic alloys have significantly less fluidity than pure metals or eutectic alloys. (c) Non-eutectic alloys solidify starting from the outside of the…arrow_forwardA riser in the shape of a sphere is to be designed for a sand casting mould at Simon Castings. The casting is a rectangular plate, with length = 400 mm, width = 250 mm, and thickness = 15 mm. If the total solidification time of the casting itself is known to be 7 min, determine the diameter of the riser so that it will take 30% longer for the riser to solidify.arrow_forwardWhat is a pattern? What are the consideration necessary while designing pattern in casting?arrow_forward
- Manufacturing Processesarrow_forwardParvinbhaiarrow_forwardDescribe the die casting process in detail. Use neat sketches for clarity. Differentiate clearly between hot-chamber die casting and cold-chamber die casting processes. What is the difference between true centrifugal and semi-centrifugal casting? Describe the centrifugal casting process in detail. Use neat sketches to elaborate your description.arrow_forward
- For sand-casting a steel rectangular plate with dimensions 80mm×120mm×20mm, a cylindrical riser has to be designed. The height of the riser is equal to its diameter. The total solidification time for the casting is 2 minutes. In Chvorinov‟s law for the estimation of the total solidification time, exponent is to be taken as 2. For a solidification time of 3 minutes in the riser, the diameter (in mm) of the riser is ____arrow_forwardWhy Venting holes and passageways must be built in die casting and not in sand casting? Why the cost of products reduce when increase the quantity? Why the actual size and shape of the cavity must be slightly oversized the product?arrow_forward(27) List the applications of permanent mold casting along with metals most commonly cast for permanent mold casting.arrow_forward
- A flat plate is to be cast in an open mold whose bottom has a square shape that is 200 mm by 200 mm. The mold is 40 mm deep. A total of 106 mm3 of molten aluminum is poured into the mold. Solidification shrinkage is known to be 6.0%. The linear shrinkage due to thermal contraction after solidification is 1.3%. If the availability of molten metal in the mold allows the square shape of the cast plate to maintain its 200 mm by 200 mm dimensions until solidification is completed, determine the final dimensions of the plate.arrow_forward4. Riser (a) What is the purpose of a riser in sand casting? (b) What are the design parameters for a riser, and what are the design constraints that you need to satisfy given your answer in (a)? (c). Assuming you are using a sand casting process, use an example to show the appropriate relationships between the design parameters for your riser that result in the longest solidification time.arrow_forwardA riser in the shape of a sphere is to be designed for a sand casting mold. The casting is a rectangular plate, with length = 100 mm, width = 50 mm, and thickness = 10 mm. If the total solidification time of the casting itself is known to be 2.5 min, determine the diameter of the riser so that it will take 20% longer for the riser to solidify. %3D %3!arrow_forward
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