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Problem 2(b): The total solidification times of two casting shapes are to be compared: (1) a...
Problem 2 (a): A mold has a downsprue of length - 6.0 in. The cross-sectional area...
Problem 2 (a): A mold has a downsprue of length - 6.0 in. The cross-sectional area at the bottom of the sprue is 0.5 in'. The sprue leads into a horizontal runner that feeds the mold cavity, whose volume = 75 in'. Determine (a) the velocity of the molten metal flowing through the base of the downsprue, (b) the volume rate of flow and (c) the time required to fill the mold cavity. Problem 2(b): The total solidification times of...
A cylindrical riser is to be designed for a sand casting mold. The length of the...
A cylindrical riser is to be designed for a sand casting mold. The length of the cylinder is 1.25 its diameter . The casting is a square plate, each side =10 in and thickness=.75 in . If the metal is Cast Iron, and the mold constant is 16.00 min/in^2 in chvorinov's rule, determine the dimensions of the riser so that it will take (40%) longer time for the riser to solidify. Can you show where the 40% is incorporated into...
Manufacturing methods 2. (25 pts) During a sand casting process, the constant C in Chvorinov's rule...
Manufacturing methods
2. (25 pts) During a sand casting process, the constant C in Chvorinov's rule is 3 santerof 7 proce the OD and the ID surfaces. a) Estimate the time for the casting to fully solidify. (15 pts) ss is used to produce a hollow cylindrical casting with an OD (outside diameter) of 75 mm. diameter) of 50 mm, and a height of 125 mm. The mold contacts the cylinder on both b) Write the equation used to calculate...
(Metal-Casting Processes) (Groups) 10.47 A round casting is 0.2 m in diameter and 0.75 m in...
(Metal-Casting Processes) (Groups) 10.47 A round casting is 0.2 m in diameter and 0.75 m in length. Another casting of the same metal is elliptical in cross-section, with a major-to-minor axis ratio of 2, and has the same length and cross-sectional area as the round casting. Both pieces are cast under the same conditions. What is the difference in the solidification times of the two castings? 10.48 A cylinder with a diameter of 50 mm and a height of 75...
1) Turbulence during pouring of the molten metal is undesirable since (two best answers): a) it...
1) Turbulence during pouring of the molten metal is undesirable since (two best answers): a) it causes discoloration of the mold surfaces, b) it dissolves the binder used to hold together the sand mold, c) it increases erosion of the mold surfaces, d) it increases the formation of metallic oxides that can become entrapped during solidification, e) it increases the mold filling time, and f) it increases total solidification time 2) Total solidification time is defined as a) time between...
Question 1 2) Manufacturing processes can be classified into 2 (Two) major groups. Briefly describe the...
Question 1 2) Manufacturing processes can be classified into 2 (Two) major groups. Briefly describe the characteristics of each group. Aid your answer with hierarchy. (10 marles) 1) Sand casting is a process for casting metal in sand molds. Explain FIVE (3) sand casting benefits to the industry (marks) Riser, also known as feeder, is an important part in a sand mold. Briefly describe the function of a riser in a sand casting mold Hence, illustrate the possible types and...
Problem 1: Fibre optics (2 points) Figure 1: Sketches of the geometry of an optical fibre...
Problem 1: Fibre optics (2 points) Figure 1: Sketches of the geometry of an optical fibre A long cylinder of dielectric material can guide light via total internal reflection. This idea dates back to the 1870s and forms the basis of the modern fibre optics communication technology. As long as the diameter of these fibres is large compared to the wavelength of the infalling light, its wave nature is negligible and we can use Geometric Optics to study the propagation...
1 2 3 4 5 6 7 Which of the following statements about extrusion additive manufacturing...
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Which of the following statements about extrusion additive manufacturing is true? Extrusion AM results in parts with anisotropic mechanical The strength of printed parts is highly correlated to layer thickness and infill density o With decreasing layer thickness, surface quality improves All of the above This is a performance running sneaker, the Futurecraft 4D, which is produced by adidas. The shoe features a 3D printed midsole, with a gradated poometry to use the...
Please answer all parts of the questions and please try making them clear and easy to understand. CONCEPTUAL QUESTIONS: (Total Points 10, 1 points each question) 1- A plate is support...
Please answer all parts of the questions and please
try making them clear and easy to understand.
CONCEPTUAL QUESTIONS: (Total Points 10, 1 points each question) 1- A plate is supported by a bal-and-socket joint at A, a roller joint at B, and a cable at C. How many unknown support reactions are there in this problem? 300 N 400 N i m A) Four forces and two moments B) Six forces C) Five forces D) Four forces and one...
Consider a cylindrical capacitor like that shown in Fig. 24.6. Let d = rb − ra...
Consider a cylindrical capacitor like that shown in Fig. 24.6. Let d = rb − ra be the spacing between the inner and outer conductors. (a) Let the radii of the two conductors be only slightly different, so that d << ra. Show that the result derived in Example 24.4 (Section 24.1) for the capacitance of a cylindrical capacitor then reduces to Eq. (24.2), the equation for the capacitance of a parallel-plate capacitor, with A being the surface area of...
Problem 2 (a): A mold has a downsprue of length - 6.0 in. The cross-sectional area at the bottom of the sprue is 0.5 in'. The sprue leads into a horizontal runner that feeds the mold cavity, whose volume = 75 in'. Determine (a) the velocity of the molten metal flowing through the base of the downsprue, (b) the volume rate of flow and (c) the time required to fill the mold cavity. Problem 2(b): The total solidification times of...
Manufacturing methods
2. (25 pts) During a sand casting process, the constant C in Chvorinov's rule is 3 santerof 7 proce the OD and the ID surfaces. a) Estimate the time for the casting to fully solidify. (15 pts) ss is used to produce a hollow cylindrical casting with an OD (outside diameter) of 75 mm. diameter) of 50 mm, and a height of 125 mm. The mold contacts the cylinder on both b) Write the equation used to calculate...
(Metal-Casting Processes) (Groups) 10.47 A round casting is 0.2 m in diameter and 0.75 m in length. Another casting of the same metal is elliptical in cross-section, with a major-to-minor axis ratio of 2, and has the same length and cross-sectional area as the round casting. Both pieces are cast under the same conditions. What is the difference in the solidification times of the two castings? 10.48 A cylinder with a diameter of 50 mm and a height of 75...
Question 1 2) Manufacturing processes can be classified into 2 (Two) major groups. Briefly describe the characteristics of each group. Aid your answer with hierarchy. (10 marles) 1) Sand casting is a process for casting metal in sand molds. Explain FIVE (3) sand casting benefits to the industry (marks) Riser, also known as feeder, is an important part in a sand mold. Briefly describe the function of a riser in a sand casting mold Hence, illustrate the possible types and...
Problem 1: Fibre optics (2 points) Figure 1: Sketches of the geometry of an optical fibre A long cylinder of dielectric material can guide light via total internal reflection. This idea dates back to the 1870s and forms the basis of the modern fibre optics communication technology. As long as the diameter of these fibres is large compared to the wavelength of the infalling light, its wave nature is negligible and we can use Geometric Optics to study the propagation...
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Which of the following statements about extrusion additive manufacturing is true? Extrusion AM results in parts with anisotropic mechanical The strength of printed parts is highly correlated to layer thickness and infill density o With decreasing layer thickness, surface quality improves All of the above This is a performance running sneaker, the Futurecraft 4D, which is produced by adidas. The shoe features a 3D printed midsole, with a gradated poometry to use the...
Please answer all parts of the questions and please
try making them clear and easy to understand.
CONCEPTUAL QUESTIONS: (Total Points 10, 1 points each question) 1- A plate is supported by a bal-and-socket joint at A, a roller joint at B, and a cable at C. How many unknown support reactions are there in this problem? 300 N 400 N i m A) Four forces and two moments B) Six forces C) Five forces D) Four forces and one...
Consider a cylindrical capacitor like that shown in Fig. 24.6. Let d = rb − ra be the spacing between the inner and outer conductors. (a) Let the radii of the two conductors be only slightly different, so that d << ra. Show that the result derived in Example 24.4 (Section 24.1) for the capacitance of a cylindrical capacitor then reduces to Eq. (24.2), the equation for the capacitance of a parallel-plate capacitor, with A being the surface area of...
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