An ECM operation is to be used to cut a hole into a plate of aluminum...
- An ECM operation is to be used to cut a hole into a plate of aluminum that is 12 mm thick. The hole has a rectangular cross section, 10 mm by 30 mm. The ECM operation will be accomplished at a current = 1200 amps. The specific removal rate for aluminum = 3.44×10-2 mm3-Amp/sec. Determine (a) feed rate, and (b) time required to cut through the plate.
- In the casting of steel under certain mold conditions, the mold constant in Chvorinov’s rule is known to be 4.0 min/cm2, based on previous experience. The casting is a flat plate whose length=30 cm, width=10 cm, and thickness=20 mm. Determine how long it will take for the casting to solidify.
- An extruder has barrel diameter and length of 100 mm and 2.8 m, respectively. The screw rotational speed = 50 rev/min, channel depth = 7.5 mm, and flight angle =17°. The plastic melt has a shear viscosity = 175 Pa-s. Determine: (a) the extruder characteristic, (b) the shape factor Ks for a circular die opening with diameter = 3.0 mm and length =12.0 mm, and (c) the operating point (Q and p).
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An ECM operation is to be used to cut a hole into a plate of
aluminum...
A square hole is to be cut using ECM through a plate of low alloy steel...
A square hole is to be cut using ECM through a plate of low alloy steel that is 12 mm thick. The hole is 35 mm on each side, but the electrode used to cut the hole is slightly less than 35 mm on its sides to allow for overcut, and its shape includes a hole in its center to permit the flow of electrolyte and to reduce the area of the cut. This will produce a center core that...
(A) (SI units) In an ECM operation the frontal working area of the electrode is 1555...
(A) (SI units) In an ECM operation the frontal working area of the electrode is 1555 mm2. Applied current = 1200 amps and voltage = 12 volts. The material being cut is nickel (valence = 2). Consult Table 25.1 for the specific removal rate of nickel. (a) If the process is 90% efficient, determine the rate of metal removal in mm3/min. (b) If the resistivity of the electrolyte = 150 ohm-mm, determine the working gap.
(5 pts) Continuous tubing is produced in a plastic extrusion operation through a die orifice whose outside diameter = 2...
(5 pts) Continuous tubing is produced in a plastic extrusion operation through a die orifice whose outside diameter = 2.0 in and inside diameter = 1.5 in. The extruder barrel diameter 5.0 in and length = 12 ft. The screw rotates at 50 rev/min; it has a channel depth 0.30 in and flight angle 16°. The head pressure has a value of 350 lb/in2 and the viscosity of the polymer melt is 90 x 10-4 lb-sec/in2. Under these conditions, what...
Question 1 A turning operation is carried out on aluminum. Based on the specific energy values...
Question 1 A turning operation is carried out on aluminum. Based on the specific energy values in Table 20.2, determine material removal rate and cutting power in the operation under the following sets of cutting conditions: (a) Cutting speed 5.6 m/s, feed 0.25 mm/rev, and depth of cut 2.0 mm; and (b) cutting speed- 1.3 m/s, feed 0.75 mm/rev, and depth 4.0 mm. Question 2 Consider a turning operation performed on steel whose hardness 225 HB at a cutting speed...
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...
A.) A circular hole is drilled through an aluminum plate. When the plate is at a...
A.) A circular hole is drilled through an aluminum plate. When the plate is at a temperature of 20.0 ◦C the hole is measured and found to have a diameter of 1.994 cm. To what temperature will it be necessary to bring the plate if a spherical ball of diameter 2.000 cm is to pass through the hole? The coefficient of linear expansion for aluminum is 2.4 × 10−5 ◦C−1). A) 87.6 ◦C B) 59.7 ◦C C ¯ ) 145...
A circular hole in an aluminum plate is 3.201 cm in diameter at 0.000°C. What is...
A circular hole in an aluminum plate is 3.201 cm in diameter at 0.000°C. What is its diameter when the temperature of the plate is raised to 107.2°C? The linear expansion coefficient of aluminum is 23.00 x 10-6/Cº.
A circular hole in an aluminum plate is 2.731 cm in diameter at 0.000°C. What is...
A circular hole in an aluminum plate is 2.731 cm in diameter at 0.000°C. What is the change in its diameter when the temperature of the plate is raised to 142.0°C? x cm Table 18-2 Some Coefficients of Linear Expansiona Substance a (10-09) Ice (at 0 C) 51 Lead Aluminum Brass Copper 17 Concrete 12 Steel Glass (ordinary) Glass (Pyrex) 3.2 Diamond Invart 0.7 Fused quartz 0.5
2 parts thx 1. A flat aluminum plate has a circular hole of diameter 1.858 cm...
2 parts thx 1. A flat aluminum plate has a circular hole of diameter 1.858 cm at 0.00 °C.What is the change in its diameter when the temperature of the plate is increased to 114 °C? For reference, the coefficient of thermal expansion for aluminum is 2.3 x 10-5/C°. Give at least 2 significant figures in your answer, which should be in cm. 2.A flat plate made of an unknown metal has a circular hole of diameter 3 cm at...
(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...
A square hole is to be cut using ECM through a plate of low alloy steel that is 12 mm thick. The hole is 35 mm on each side, but the electrode used to cut the hole is slightly less than 35 mm on its sides to allow for overcut, and its shape includes a hole in its center to permit the flow of electrolyte and to reduce the area of the cut. This will produce a center core that...
(5 pts) Continuous tubing is produced in a plastic extrusion operation through a die orifice whose outside diameter = 2.0 in and inside diameter = 1.5 in. The extruder barrel diameter 5.0 in and length = 12 ft. The screw rotates at 50 rev/min; it has a channel depth 0.30 in and flight angle 16°. The head pressure has a value of 350 lb/in2 and the viscosity of the polymer melt is 90 x 10-4 lb-sec/in2. Under these conditions, what...
Question 1 A turning operation is carried out on aluminum. Based on the specific energy values in Table 20.2, determine material removal rate and cutting power in the operation under the following sets of cutting conditions: (a) Cutting speed 5.6 m/s, feed 0.25 mm/rev, and depth of cut 2.0 mm; and (b) cutting speed- 1.3 m/s, feed 0.75 mm/rev, and depth 4.0 mm. Question 2 Consider a turning operation performed on steel whose hardness 225 HB at a cutting speed...
A circular hole in an aluminum plate is 3.201 cm in diameter at 0.000°C. What is its diameter when the temperature of the plate is raised to 107.2°C? The linear expansion coefficient of aluminum is 23.00 x 10-6/Cº.
A circular hole in an aluminum plate is 2.731 cm in diameter at 0.000°C. What is the change in its diameter when the temperature of the plate is raised to 142.0°C? x cm Table 18-2 Some Coefficients of Linear Expansiona Substance a (10-09) Ice (at 0 C) 51 Lead Aluminum Brass Copper 17 Concrete 12 Steel Glass (ordinary) Glass (Pyrex) 3.2 Diamond Invart 0.7 Fused quartz 0.5
(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...
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