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15 Points In one workshop, five holes (12 mm diameter) need to be drilled in a...
A through hole with a diameter of 32.0 mm is to be drilled through a steel...
A through hole with a diameter of 32.0 mm is to be drilled through a steel plate that is 55 mm thick. Cutting conditions are as follows: cutting speed 25 mlmin, feed- 0.08 mm/rev.and the point angle of the drill115°. If machining time begins as soon as the drill makes contact with the work, how much time will the drilling operation take?
ion is performed on a steel part using a 12.7-mm-diameter twist drill mmirev. Determine (a) cutting...
ion is performed on a steel part using a 12.7-mm-diameter twist drill mmirev. Determine (a) cutting time of the operation and (b) max metal removal 2. (10 pts) A drilling operat with point angle 118. The hole is a blind hole with a depth 60 mm. Cutting speed 15 m/min and feed- 0.2 rate.
Items 12-15 pertain to the following data: SAE 8617 R.29 and 4.500 inches in diameter is turned u...
Items 12-15 pertain to the following data: SAE 8617 R.29 and 4.500 inches in diameter is turned using hard coated carbide in TPU322 insert (use Opt. values) 12. What is the correct rpm for this tool/workpiece combination 13. What is the correct feed-rate for this tool/workpiece combination? 14. What is the correct cutting speed for this tool/workpiece combination? 15. What is the correct cutting speed for this tool/workpiece combination? 16. 7/8 drill is used to drill a hole to have...
a) A workpiece (φ-75 mm, 1 275 mm) is machined using turning at a feed rate of 0.25 mm/rev. At a cutting speed- 3.5 m/s, the turning tool is ineffective after machining 3 parts, and at a cutting s...
a) A workpiece (φ-75 mm, 1 275 mm) is machined using turning at a feed rate of 0.25 mm/rev. At a cutting speed- 3.5 m/s, the turning tool is ineffective after machining 3 parts, and at a cutting speed = 2.5 m/s, the turning tool is effective for producing 20 parts. Calculate the Cutting Speed that will allow 30 parts to be machined between tool changes [20 marks] b) An aluminium alloy workpiece (tensile strength - 325 N/mm2 and yield...
Problem Statement You are the manager of a workshop. You need to turn 1,500 shafts as...
Problem Statement You are the manager of a workshop. You need to turn 1,500 shafts as an intermediate step in a larger manufacturing process. It takes your workshop technician 20 min to machine a single shaft at a cutting speed of 15 m/min and 10 min to set up the blank in the spindle. Since you are turning 1,500 shafts, the technician will certainly change the cutting tool to maintain quality - a tool change would require five minutes. The...
Problem 1 Consider the drilling of Feature 3 (Thru Hole) on the flashlight head (Figure 1)...
Problem 1 Consider the drilling of Feature 3 (Thru Hole) on the flashlight head (Figure 1) Assume the feed of the drilling opcration (i.e., the distance the drill penetrates per unit revolution) is,f= 0.01 inrev. " a) Calculate the material removal rate (in in3/s or mm3/s). b) Use the Taylor Tool Life equation to estimate the tool life (in minutes) for this operation. Use Table 1 to pick appropriate values of C and n (the flashlight material is aluminum and...
Stainless steel rod with a diameter of 15 mm and a length of 15 cm is...
Stainless steel rod with a diameter of 15 mm and a length of 15 cm is machined to a diameter of 10 mm. The spindle rotates at a revolution speed of 480 rps. And tool is travelling with an axial speed of 200 mm/min. Calculate the cutting speed, material removal rate, cutting time, power dissipated and cutting force.
Fundamentals of Mechanical Manufacturing Technology: Exercise5 Material-removal Rate The rate (MRR) in turning is the volume...
Fundamentals of Mechanical Manufacturing Technology: Exercise5 Material-removal Rate The rate (MRR) in turning is the volume of material removed per unit time, with the units of m/min De + D t also can be written as MRR = drv Do: Orignal diameter of workpiece,mm Dr: Final diameter of workpiece, mm Davg: Average diameter of workpiece, mm d: Depth of cut, mm f: Feed, mm/rev 4feed rate ofdf-㈢ )-mm, the distance traveled is l mn, the cutting time is Eq. (2)...
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...
Question 3 Suppose a cemented carbide tool with a brazed insert is used to turn a steel workpart that is 375 mmlong and 62.5 mnm in diameter. The parameters in the Taylor equation are: n = 0.25 an...
Question 3 Suppose a cemented carbide tool with a brazed insert is used to turn a steel workpart that is 375 mmlong and 62.5 mnm in diameter. The parameters in the Taylor equation are: n = 0.25 and C = 300 (m/min) for a feed of 0.30 mm/rev. The price of the brazed insert N$30.00, and it can be used a total of 15 times before it must be scrapped. The tool change time for the regrindable tooling 3.0 min....
A through hole with a diameter of 32.0 mm is to be drilled through a steel plate that is 55 mm thick. Cutting conditions are as follows: cutting speed 25 mlmin, feed- 0.08 mm/rev.and the point angle of the drill115°. If machining time begins as soon as the drill makes contact with the work, how much time will the drilling operation take?
ion is performed on a steel part using a 12.7-mm-diameter twist drill mmirev. Determine (a) cutting time of the operation and (b) max metal removal 2. (10 pts) A drilling operat with point angle 118. The hole is a blind hole with a depth 60 mm. Cutting speed 15 m/min and feed- 0.2 rate.
Items 12-15 pertain to the following data: SAE 8617 R.29 and 4.500 inches in diameter is turned using hard coated carbide in TPU322 insert (use Opt. values) 12. What is the correct rpm for this tool/workpiece combination 13. What is the correct feed-rate for this tool/workpiece combination? 14. What is the correct cutting speed for this tool/workpiece combination? 15. What is the correct cutting speed for this tool/workpiece combination? 16. 7/8 drill is used to drill a hole to have...
a) A workpiece (φ-75 mm, 1 275 mm) is machined using turning at a feed rate of 0.25 mm/rev. At a cutting speed- 3.5 m/s, the turning tool is ineffective after machining 3 parts, and at a cutting speed = 2.5 m/s, the turning tool is effective for producing 20 parts. Calculate the Cutting Speed that will allow 30 parts to be machined between tool changes [20 marks] b) An aluminium alloy workpiece (tensile strength - 325 N/mm2 and yield...
Problem Statement You are the manager of a workshop. You need to turn 1,500 shafts as an intermediate step in a larger manufacturing process. It takes your workshop technician 20 min to machine a single shaft at a cutting speed of 15 m/min and 10 min to set up the blank in the spindle. Since you are turning 1,500 shafts, the technician will certainly change the cutting tool to maintain quality - a tool change would require five minutes. The...
Problem 1 Consider the drilling of Feature 3 (Thru Hole) on the flashlight head (Figure 1) Assume the feed of the drilling opcration (i.e., the distance the drill penetrates per unit revolution) is,f= 0.01 inrev. " a) Calculate the material removal rate (in in3/s or mm3/s). b) Use the Taylor Tool Life equation to estimate the tool life (in minutes) for this operation. Use Table 1 to pick appropriate values of C and n (the flashlight material is aluminum and...
Fundamentals of Mechanical Manufacturing Technology: Exercise5 Material-removal Rate The rate (MRR) in turning is the volume of material removed per unit time, with the units of m/min De + D t also can be written as MRR = drv Do: Orignal diameter of workpiece,mm Dr: Final diameter of workpiece, mm Davg: Average diameter of workpiece, mm d: Depth of cut, mm f: Feed, mm/rev 4feed rate ofdf-㈢ )-mm, the distance traveled is l mn, the cutting time is Eq. (2)...
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...
Question 3 Suppose a cemented carbide tool with a brazed insert is used to turn a steel workpart that is 375 mmlong and 62.5 mnm in diameter. The parameters in the Taylor equation are: n = 0.25 and C = 300 (m/min) for a feed of 0.30 mm/rev. The price of the brazed insert N$30.00, and it can be used a total of 15 times before it must be scrapped. The tool change time for the regrindable tooling 3.0 min....
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