Answer to Question #281316 in Mechanical Engineering for Dev

Question

The mechanism, as shown in Fig. 3, has the dimensions of various links as follows: AB = DE

= 150 mm; BC = CD = 450 mm; EF = 375 mm. The crank AB makes an angle of 45° with the

horizontal and rotates about A in the clockwise direction at a uniform speed of 120 r.p.m. The

lever DC oscillates about the fixed-point D, which is connected to AB by the coupler BC. The

block F moves in the horizontal guides, being driven by the link EF. Determine: 1. velocity of

the block F, 2. angular velocity of DC, and 3. rubbing speed at the pin C which is 50 mm in

diameter.

Answer 1

Answer with diagrams given below: