Mechanical Engineering Exam > Mechanical Engineering Questions > What is the approximate % change in the life,...
Start Learning for Free
What is the approximate % change in the life, f, of the tool with zero rake angle used in orthogonal cutting when its clearance angle, α, is changed from 10 to 7 deg?
(Hint : Flank wear rate is proportional to cot a)
[ME 1999]
- a)30% increase
- b)30% decrease
- c)70% increase
- d)70% decrease
Correct answer is option 'B'. Can you explain this answer?
| FREE This question is part of | Download PDF Attempt this Test |
Verified Answer
What is the approximate % change in the life, f, of the tool with zero...
Wear rate is proportional to tan y, i.e.
Wear rate ∝ tan y
Where, y = Clearance angle
When clearance angle is decreased from 10° to 7°, then
= 30.37 % decrease.
Wear rate ∝ tan y
Where, y = Clearance angle
When clearance angle is decreased from 10° to 7°, then
= 30.37 % decrease.
Most Upvoted Answer
What is the approximate % change in the life, f, of the tool with zero...
Assuming that the cutting conditions are kept constant, the approximate % change in the life of the tool with zero rake angle used in orthogonal cutting when its clearance angle is increased can be estimated using the following equation:
% change in tool life = (1 - tanα2/tanα1) x 100
Where:
α1 = original clearance angle
α2 = new clearance angle
The clearance angle is the angle between the flank of the tool and the workpiece surface that is being cut. Increasing the clearance angle reduces the contact area between the tool and the workpiece, which can reduce the cutting forces and the amount of heat generated during the cutting process. This can prolong the life of the tool.
However, increasing the clearance angle also reduces the strength and stability of the tool, which can lead to increased vibrations and chatter during the cutting process. This can cause premature tool failure and reduce the quality of the machined surface.
Therefore, the optimal clearance angle depends on the specific cutting conditions and the properties of the workpiece material. Generally, a clearance angle of 6-8 degrees is recommended for most materials.
Assuming that the original clearance angle is 6 degrees and the new clearance angle is 8 degrees, the % change in tool life can be calculated as:
% change in tool life = (1 - tan8/tan6) x 100
% change in tool life = (1 - 0.277/0.105) x 100
% change in tool life = 62.9%
Therefore, increasing the clearance angle from 6 to 8 degrees can increase the tool life by approximately 62.9%. However, this is only an estimate and the actual change in tool life may vary depending on the specific cutting conditions and the properties of the workpiece material.
% change in tool life = (1 - tanα2/tanα1) x 100
Where:
α1 = original clearance angle
α2 = new clearance angle
The clearance angle is the angle between the flank of the tool and the workpiece surface that is being cut. Increasing the clearance angle reduces the contact area between the tool and the workpiece, which can reduce the cutting forces and the amount of heat generated during the cutting process. This can prolong the life of the tool.
However, increasing the clearance angle also reduces the strength and stability of the tool, which can lead to increased vibrations and chatter during the cutting process. This can cause premature tool failure and reduce the quality of the machined surface.
Therefore, the optimal clearance angle depends on the specific cutting conditions and the properties of the workpiece material. Generally, a clearance angle of 6-8 degrees is recommended for most materials.
Assuming that the original clearance angle is 6 degrees and the new clearance angle is 8 degrees, the % change in tool life can be calculated as:
% change in tool life = (1 - tan8/tan6) x 100
% change in tool life = (1 - 0.277/0.105) x 100
% change in tool life = 62.9%
Therefore, increasing the clearance angle from 6 to 8 degrees can increase the tool life by approximately 62.9%. However, this is only an estimate and the actual change in tool life may vary depending on the specific cutting conditions and the properties of the workpiece material.
Attention Mechanical Engineering Students!
To make sure you are not studying endlessly, EduRev has designed Mechanical Engineering study material, with Structured Courses, Videos, & Test Series. Plus get personalized analysis, doubt solving and improvement plans to achieve a great score in Mechanical Engineering.
|
Explore Courses for Mechanical Engineering exam
|
|
Similar Mechanical Engineering Doubts
Top Courses for Mechanical EngineeringView all
What is the approximate % change in the life, f, of the tool with zero rake angle used in orthogonal cutting when its clearance angle, α, is changed from 10 to 7 deg?(Hint : Flank wear rate is proportional to cot a)[ME 1999]a)30% increaseb)30% decreasec)70% increased)70% decreaseCorrect answer is option 'B'. Can you explain this answer?
Question Description
What is the approximate % change in the life, f, of the tool with zero rake angle used in orthogonal cutting when its clearance angle, α, is changed from 10 to 7 deg?(Hint : Flank wear rate is proportional to cot a)[ME 1999]a)30% increaseb)30% decreasec)70% increased)70% decreaseCorrect answer is option 'B'. Can you explain this answer? for Mechanical Engineering 2024 is part of Mechanical Engineering preparation. The Question and answers have been prepared according to the Mechanical Engineering exam syllabus. Information about What is the approximate % change in the life, f, of the tool with zero rake angle used in orthogonal cutting when its clearance angle, α, is changed from 10 to 7 deg?(Hint : Flank wear rate is proportional to cot a)[ME 1999]a)30% increaseb)30% decreasec)70% increased)70% decreaseCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for Mechanical Engineering 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for What is the approximate % change in the life, f, of the tool with zero rake angle used in orthogonal cutting when its clearance angle, α, is changed from 10 to 7 deg?(Hint : Flank wear rate is proportional to cot a)[ME 1999]a)30% increaseb)30% decreasec)70% increased)70% decreaseCorrect answer is option 'B'. Can you explain this answer?.
What is the approximate % change in the life, f, of the tool with zero rake angle used in orthogonal cutting when its clearance angle, α, is changed from 10 to 7 deg?(Hint : Flank wear rate is proportional to cot a)[ME 1999]a)30% increaseb)30% decreasec)70% increased)70% decreaseCorrect answer is option 'B'. Can you explain this answer? for Mechanical Engineering 2024 is part of Mechanical Engineering preparation. The Question and answers have been prepared according to the Mechanical Engineering exam syllabus. Information about What is the approximate % change in the life, f, of the tool with zero rake angle used in orthogonal cutting when its clearance angle, α, is changed from 10 to 7 deg?(Hint : Flank wear rate is proportional to cot a)[ME 1999]a)30% increaseb)30% decreasec)70% increased)70% decreaseCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for Mechanical Engineering 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for What is the approximate % change in the life, f, of the tool with zero rake angle used in orthogonal cutting when its clearance angle, α, is changed from 10 to 7 deg?(Hint : Flank wear rate is proportional to cot a)[ME 1999]a)30% increaseb)30% decreasec)70% increased)70% decreaseCorrect answer is option 'B'. Can you explain this answer?.
Solutions for What is the approximate % change in the life, f, of the tool with zero rake angle used in orthogonal cutting when its clearance angle, α, is changed from 10 to 7 deg?(Hint : Flank wear rate is proportional to cot a)[ME 1999]a)30% increaseb)30% decreasec)70% increased)70% decreaseCorrect answer is option 'B'. Can you explain this answer? in English & in Hindi are available as part of our courses for Mechanical Engineering.
Download more important topics, notes, lectures and mock test series for Mechanical Engineering Exam by signing up for free.
Here you can find the meaning of What is the approximate % change in the life, f, of the tool with zero rake angle used in orthogonal cutting when its clearance angle, α, is changed from 10 to 7 deg?(Hint : Flank wear rate is proportional to cot a)[ME 1999]a)30% increaseb)30% decreasec)70% increased)70% decreaseCorrect answer is option 'B'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of
What is the approximate % change in the life, f, of the tool with zero rake angle used in orthogonal cutting when its clearance angle, α, is changed from 10 to 7 deg?(Hint : Flank wear rate is proportional to cot a)[ME 1999]a)30% increaseb)30% decreasec)70% increased)70% decreaseCorrect answer is option 'B'. Can you explain this answer?, a detailed solution for What is the approximate % change in the life, f, of the tool with zero rake angle used in orthogonal cutting when its clearance angle, α, is changed from 10 to 7 deg?(Hint : Flank wear rate is proportional to cot a)[ME 1999]a)30% increaseb)30% decreasec)70% increased)70% decreaseCorrect answer is option 'B'. Can you explain this answer? has been provided alongside types of What is the approximate % change in the life, f, of the tool with zero rake angle used in orthogonal cutting when its clearance angle, α, is changed from 10 to 7 deg?(Hint : Flank wear rate is proportional to cot a)[ME 1999]a)30% increaseb)30% decreasec)70% increased)70% decreaseCorrect answer is option 'B'. Can you explain this answer? theory, EduRev gives you an
ample number of questions to practice What is the approximate % change in the life, f, of the tool with zero rake angle used in orthogonal cutting when its clearance angle, α, is changed from 10 to 7 deg?(Hint : Flank wear rate is proportional to cot a)[ME 1999]a)30% increaseb)30% decreasec)70% increased)70% decreaseCorrect answer is option 'B'. Can you explain this answer? tests, examples and also practice Mechanical Engineering tests.
|
|
Explore Courses for Mechanical Engineering exam
|
|
Suggested Free Tests
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
|
© EduRev
|
Education Revolution
|
Follow Us
|
Signup to see your scores
go up within 7 days!
Access 1000+ FREE Docs, Videos and Tests
Takes less than 10 seconds to signup