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In a crank and slot ted lever quick return mot ion mechanism, the distance between the fixed centres is
240 mm and the length of the driving crank is 120 mm. Find the inclinat ion of the slotted bar with the
vertical in the extreme position and the time ratio of cutting stroke t o the return stroke, if the length of
the slot ted bar is 450 mm
240 mm and the length of the driving crank is 120 mm. Find the inclinat ion of the slotted bar with the
vertical in the extreme position and the time ratio of cutting stroke t o the return stroke, if the length of
the slot ted bar is 450 mm
- a)45°, 1.8
- b)60º, 2
- c)30°, 2
- d)40°, 3
Correct answer is option 'C'. Can you explain this answer?
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In a crank and slot ted lever quick return mot ion mechanism, the dist...
T ime ratio of cutting stroke to the return stroke
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In a crank and slot ted lever quick return mot ion mechanism, the dist...
To determine the inclination of the slotted bar with the vertical in the extreme position, we need to use the following formula:
θ = sin-1((L - L1)/L2)
where:
- θ is the inclination angle
- L is the length of the slotted bar (450 mm)
- L1 is the distance between the fixed center and the crank pin center (half the length of the driving crank) = 60 mm
- L2 is the distance between the fixed center and the slotted bar pin center (240 mm - L1) = 180 mm
θ = sin-1((450 - 60)/180) = sin-1(2.17) = 67.5° (rounded to the nearest 0.5°)
To determine the time ratio of cutting stroke to return stroke, we need to use the following formula:
Time ratio = (1 + (T1/T2))/2
where:
- T1 is the time taken for the cutting stroke
- T2 is the time taken for the return stroke
To calculate T1 and T2, we need to use the following formulas:
T1 = π(L1 + L2)/V
T2 = π(L1 + L2 + 2L)/V
where:
- V is the cutting speed
Assuming a cutting speed of 100 mm/s, we get:
T1 = π(60 + 180)/(100) = 6π/5 s
T2 = π(60 + 180 + 2*450)/(100) = 12π/5 s
Time ratio = (1 + (6π/5)/(12π/5))/2 = 5/6
Therefore, the time ratio of cutting stroke to return stroke is 5/6.
θ = sin-1((L - L1)/L2)
where:
- θ is the inclination angle
- L is the length of the slotted bar (450 mm)
- L1 is the distance between the fixed center and the crank pin center (half the length of the driving crank) = 60 mm
- L2 is the distance between the fixed center and the slotted bar pin center (240 mm - L1) = 180 mm
θ = sin-1((450 - 60)/180) = sin-1(2.17) = 67.5° (rounded to the nearest 0.5°)
To determine the time ratio of cutting stroke to return stroke, we need to use the following formula:
Time ratio = (1 + (T1/T2))/2
where:
- T1 is the time taken for the cutting stroke
- T2 is the time taken for the return stroke
To calculate T1 and T2, we need to use the following formulas:
T1 = π(L1 + L2)/V
T2 = π(L1 + L2 + 2L)/V
where:
- V is the cutting speed
Assuming a cutting speed of 100 mm/s, we get:
T1 = π(60 + 180)/(100) = 6π/5 s
T2 = π(60 + 180 + 2*450)/(100) = 12π/5 s
Time ratio = (1 + (6π/5)/(12π/5))/2 = 5/6
Therefore, the time ratio of cutting stroke to return stroke is 5/6.
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In a crank and slot ted lever quick return mot ion mechanism, the distance between the fixed centres is240 mm and the length of the driving crank is 120 mm. Find the inclinat ion of the slotted bar with thevertical in the extreme position and the time ratio of cutting stroke t o the return stroke, if the length ofthe slot ted bar is 450 mma)45°, 1.8b)60º, 2c)30°, 2d)40°, 3Correct answer is option 'C'. Can you explain this answer?
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In a crank and slot ted lever quick return mot ion mechanism, the distance between the fixed centres is240 mm and the length of the driving crank is 120 mm. Find the inclinat ion of the slotted bar with thevertical in the extreme position and the time ratio of cutting stroke t o the return stroke, if the length ofthe slot ted bar is 450 mma)45°, 1.8b)60º, 2c)30°, 2d)40°, 3Correct answer is option 'C'. 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 In a crank and slot ted lever quick return mot ion mechanism, the distance between the fixed centres is240 mm and the length of the driving crank is 120 mm. Find the inclinat ion of the slotted bar with thevertical in the extreme position and the time ratio of cutting stroke t o the return stroke, if the length ofthe slot ted bar is 450 mma)45°, 1.8b)60º, 2c)30°, 2d)40°, 3Correct answer is option 'C'. 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 In a crank and slot ted lever quick return mot ion mechanism, the distance between the fixed centres is240 mm and the length of the driving crank is 120 mm. Find the inclinat ion of the slotted bar with thevertical in the extreme position and the time ratio of cutting stroke t o the return stroke, if the length ofthe slot ted bar is 450 mma)45°, 1.8b)60º, 2c)30°, 2d)40°, 3Correct answer is option 'C'. Can you explain this answer?.
In a crank and slot ted lever quick return mot ion mechanism, the distance between the fixed centres is240 mm and the length of the driving crank is 120 mm. Find the inclinat ion of the slotted bar with thevertical in the extreme position and the time ratio of cutting stroke t o the return stroke, if the length ofthe slot ted bar is 450 mma)45°, 1.8b)60º, 2c)30°, 2d)40°, 3Correct answer is option 'C'. 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 In a crank and slot ted lever quick return mot ion mechanism, the distance between the fixed centres is240 mm and the length of the driving crank is 120 mm. Find the inclinat ion of the slotted bar with thevertical in the extreme position and the time ratio of cutting stroke t o the return stroke, if the length ofthe slot ted bar is 450 mma)45°, 1.8b)60º, 2c)30°, 2d)40°, 3Correct answer is option 'C'. 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 In a crank and slot ted lever quick return mot ion mechanism, the distance between the fixed centres is240 mm and the length of the driving crank is 120 mm. Find the inclinat ion of the slotted bar with thevertical in the extreme position and the time ratio of cutting stroke t o the return stroke, if the length ofthe slot ted bar is 450 mma)45°, 1.8b)60º, 2c)30°, 2d)40°, 3Correct answer is option 'C'. Can you explain this answer?.
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In a crank and slot ted lever quick return mot ion mechanism, the distance between the fixed centres is240 mm and the length of the driving crank is 120 mm. Find the inclinat ion of the slotted bar with thevertical in the extreme position and the time ratio of cutting stroke t o the return stroke, if the length ofthe slot ted bar is 450 mma)45°, 1.8b)60º, 2c)30°, 2d)40°, 3Correct answer is option 'C'. Can you explain this answer?, a detailed solution for In a crank and slot ted lever quick return mot ion mechanism, the distance between the fixed centres is240 mm and the length of the driving crank is 120 mm. Find the inclinat ion of the slotted bar with thevertical in the extreme position and the time ratio of cutting stroke t o the return stroke, if the length ofthe slot ted bar is 450 mma)45°, 1.8b)60º, 2c)30°, 2d)40°, 3Correct answer is option 'C'. Can you explain this answer? has been provided alongside types of In a crank and slot ted lever quick return mot ion mechanism, the distance between the fixed centres is240 mm and the length of the driving crank is 120 mm. Find the inclinat ion of the slotted bar with thevertical in the extreme position and the time ratio of cutting stroke t o the return stroke, if the length ofthe slot ted bar is 450 mma)45°, 1.8b)60º, 2c)30°, 2d)40°, 3Correct answer is option 'C'. Can you explain this answer? theory, EduRev gives you an
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