Problem 1 Consider the follower has the following motion characteristics: • Rise to h= 30mm with a harmonic motion for 0

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Problem 1 Consider The Follower Has The Following Motion Characteristics Rise To H 30mm With A Harmonic Motion For 0 1 (63.75 KiB) Viewed 43 times

Problem 1 Consider the follower has the following motion characteristics: • Rise to h= 30mm with a harmonic motion for 0 = 0 to 120°, • Dwell at h = 30 mm for = 120° to 0= 180° • Return (fall) to 0 mm with a parabolic motion for 0 - 180 to 0 - 300 • Dwell at h=0 mm for 0=300"to 0= 360° (a) Fill the following table 0 (0) 0 30 60 90 120 180 210 240 270 300 y (mm) 0 360 0 (b) Sketch roughly the following diagrams (versus cam angle (0) where I 05360): o follower displacement diagrams follower velocity diagram follower acceleration diagram, (b) If o-10 rad's (constant), find the velocity and acceleration at 0-60 and 240° Problem 2 Design a full return (fall) polynomial cam that satisfies the following boundary conditions (B.C): At 0-0, y = h. y'=0.y" = 0 At 8-B, y = 0, y'=0,7" =0 Problem 3 Use the displacement diagram in Problem I to draw the cam profile for a radial inline knife- edge follower. The base circle radius is 50 mm and the cam is rotating counterclockwise. Determine the pressure angle at 1-60° and 240" Problem 4 Consider the follower has the following motion characteristics: • Rise to 40 mm with a cycloidal motion for 0=0° to 120 • Dwell at h-40 mm for 0 - 120 to 0-240 Return (fall) to 0 mm with a harmonic motion for 8=240° to 0= 360° (a) Fill the following table 00) 030 60 90 120 240 270 300 330 360 (mm) 0 (6) Draw the cam profile for inline radial roller follower of radius R-15 mm. The base circle radius is 25 mm and the cam is rotating clockwise. (c) Sketch roughly the following diagrams (versus cam angle (0) where 0 < 360): o follower displacement diagrams follower velocity diagram o follower acceleration diagram, 0