Answered: R1 Line of stroke P2 P1 B2 B1 (90°– S A

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Mechanical Engineering

R1 Line of stroke P2 P1 B2 B1 (90°– S A

International Edition---engineering Mechanics: Statics, 4th Edition

4th Edition

ISBN:9781305501607

Author:Andrew Pytel And Jaan Kiusalaas

Publisher:Andrew Pytel And Jaan Kiusalaas

Chapter7: Dry Friction

Section: Chapter Questions

Problem 7.70P: Solve Sample Problem 7.16 if the contact pressure under the polisher varies parabolically from p0 at...

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Concept explainers

Machining Processes and Machine Tools

Machining is represented as the process in which an excessive amount of substance is eliminated from the particular element in the form of pieces. In machining, cutting tools such as rotary tools, lathe, drill press, grinder, chop saw, welders, and many more are applied to get the desired shape. As compared to other manufacturing processes, machining is precise and versatile.

Question

In a crank and slotted lever quick return motion mechanism shown in Fig. for Q. No.
1(c), the distance between the fixed centers is 224 mm and the length of the
driving crank is 126 mm. Find the inclination of the slotted bar with the vertical in
the extreme position and the time ratio of cutting stroke to the return stroke.
If the length of the slotted bar is 442 mm, find the length of the stroke if the line of
stroke passes through the extreme positions of the free end of the lever.

R2
R1
Line of stroke
Q
P2
B2
B1
(90°– S
Fig. for Q. No. 1(c)

Branch of science that deals with the stationary and moving bodies under the influence of forces.

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Step 1 Calculation of inclination and Quick return ratio.

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Step 2 Calculation of length of stroke.

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