3) Turning: A turning operation is to be adopted under the following machining conditions: Cutting speed: V = 75 m/min Feed rate: f= 0.25 mm/rev Depth of cut: a = 1.75 mm. External workpiece diameter: Do = 50 mm Determine: a. The final workpiece diameter b. The rotational speed of the workpiece c. The tool feed rate expressed in m/min d. The material removal rate in mm³/min e. The specific energy of the material assuming that the measured cutting force is F= 750 N. Knowing the specific energy, which of materials from the table below could the workpiece be composed? Approximate Specific-Energy Requirements in Cutting Operations SPECIFIC ENERGY* MATERIAL Aluminum alloys Cast irons Copper alloys High-temperature alloys W-s/mm³ 0.4-1.1 1.6-5.5 1.4-3.3 3.3-8.5 0.4-0.6 4.9-6.8 3.8-9.6 3.0-5.2 2.7-9.3 3.0-4.1 hp-min/in³ 0.15-0.4 0.6-2.0 0.5-1.2 1.2-3.1 0.15-0.2 1.8-2.5 1.1-3.5 1.1-1.9 1.0-3.4 1.1-1.5 Magnesium alloys Nickel alloys Refractory alloys Stainless steels Steels Titanium alloys *At drive motor, corrected for 80% efficiency; multiply the energy by 1.25 for dull tools.
3) Turning: A turning operation is to be adopted under the following machining conditions: Cutting speed: V = 75 m/min Feed rate: f= 0.25 mm/rev Depth of cut: a = 1.75 mm. External workpiece diameter: Do = 50 mm Determine: a. The final workpiece diameter b. The rotational speed of the workpiece c. The tool feed rate expressed in m/min d. The material removal rate in mm³/min e. The specific energy of the material assuming that the measured cutting force is F= 750 N. Knowing the specific energy, which of materials from the table below could the workpiece be composed? Approximate Specific-Energy Requirements in Cutting Operations SPECIFIC ENERGY* MATERIAL Aluminum alloys Cast irons Copper alloys High-temperature alloys W-s/mm³ 0.4-1.1 1.6-5.5 1.4-3.3 3.3-8.5 0.4-0.6 4.9-6.8 3.8-9.6 3.0-5.2 2.7-9.3 3.0-4.1 hp-min/in³ 0.15-0.4 0.6-2.0 0.5-1.2 1.2-3.1 0.15-0.2 1.8-2.5 1.1-3.5 1.1-1.9 1.0-3.4 1.1-1.5 Magnesium alloys Nickel alloys Refractory alloys Stainless steels Steels Titanium alloys *At drive motor, corrected for 80% efficiency; multiply the energy by 1.25 for dull tools.
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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Question
![3) Turning: A turning operation is to be adopted under the following machining conditions:
Cutting speed: V = 75 m/min
Feed rate: f= 0.25 mm/rev
Depth of cut: a = 1.75 mm
External workpiece diameter: Do = 50 mm
Determine:
a. The final workpiece diameter
b. The rotational speed of the workpiece
c. The tool feed rate expressed in m/min
d. The material removal rate mm³/min
e. The specific energy of the material assuming that the measured cutting force is F= 750 N.
Knowing the specific energy, which of materials from the table below could the workpiece be
composed?
Approximate Specific-Energy Requirements in Cutting Operations
SPECIFIC ENERGY*
MATERIAL
Aluminum alloys
Cast irons
Copper alloys
High-temperature alloys
W-s/mm³
0.4-1.1
1.6-5.5
1.4-3.3
3.3-8.5
0.4-0.6
4.9-6.8
3.8-9.6
3.0-5.2
2.7-9.3
3.0-4.1
hp-min/in³
0.15-0.4
0.6-2.0
0.5-1.2
1.2-3.1
0.15-0.2
1.8-2.5
1.1-3.5
1.1-1.9
1.0-3.4
1.1-1.5
Magnesium alloys
Nickel alloys
Refractory alloys
Stainless steels
Steels
Titanium alloys
* At drive motor, corrected for 80% efficiency; multiply the energy by 1.25 for dull tools.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fce0a58ad-57fb-4927-ac11-40e4d0cfe182%2F435b9557-9138-407f-a65b-5defdeca218c%2Fhxtcogs_processed.jpeg&w=3840&q=75)
Transcribed Image Text:3) Turning: A turning operation is to be adopted under the following machining conditions:
Cutting speed: V = 75 m/min
Feed rate: f= 0.25 mm/rev
Depth of cut: a = 1.75 mm
External workpiece diameter: Do = 50 mm
Determine:
a. The final workpiece diameter
b. The rotational speed of the workpiece
c. The tool feed rate expressed in m/min
d. The material removal rate mm³/min
e. The specific energy of the material assuming that the measured cutting force is F= 750 N.
Knowing the specific energy, which of materials from the table below could the workpiece be
composed?
Approximate Specific-Energy Requirements in Cutting Operations
SPECIFIC ENERGY*
MATERIAL
Aluminum alloys
Cast irons
Copper alloys
High-temperature alloys
W-s/mm³
0.4-1.1
1.6-5.5
1.4-3.3
3.3-8.5
0.4-0.6
4.9-6.8
3.8-9.6
3.0-5.2
2.7-9.3
3.0-4.1
hp-min/in³
0.15-0.4
0.6-2.0
0.5-1.2
1.2-3.1
0.15-0.2
1.8-2.5
1.1-3.5
1.1-1.9
1.0-3.4
1.1-1.5
Magnesium alloys
Nickel alloys
Refractory alloys
Stainless steels
Steels
Titanium alloys
* At drive motor, corrected for 80% efficiency; multiply the energy by 1.25 for dull tools.
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