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b) Distinguish between the cycloid and involute forms of gear teeth.

Derive an expression for the minimum number of teeth in an involute profile
gear.
PART C
Answer any four full questions, each carries 10 marks.
In the given gear train, the shaft B is stationary and shaft C is driven at 380 rpm
in the counter clockwise direction. Determine the speed and direction of rotation
of shaft A.

a) Sketch a reverted gear train and epicyclic gear train.

b) Establish the relation between speed ratio and train value of a simple gear
train.

Discuss the method of determining the angles for input and output link in a

four-bar mechanism for function generation with an example.

The motions of the input and output links are related by the equation y = x’, The
range of x is from | to 4. Find x and y values using Chebychev spacing for five
precision points.

In a slider crank mechanism, for the three position coordination, the angular
displacements of the crank are 40° and 100°. The respective linear
displacements of the slider are 120 mm and 220 mm. The eccentricity of the
slider is 20 mm. Design the mechanism graphically.

Synthesize a four-bar mechanism to guide a rod (coupler) AB through three
consecutive positions A;B;, 0232 and ^\383 as follows.

A; (3,0), Bi (3.5), ഷാ (11.7), 82 (6,7), ७3 (5.2) and 83 (8,6)

The motions of the input and output links of a four-bar mechanism are governed
by the function y = 3×2. The x varies from 1 to 3 with an interval of 1. Assume
the input angle varies from 30° to 110° and output angle varies from 70° to 130°.
Synthesize the mechanism using Freudenstien’s equation.

मैप RK ‏بد‎

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