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

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Problem 1 Consider The Follower Has The Following Motion Characteristics Rise To H 30 Mm With A Harmonic Motion For 0 0 1 (62.93 KiB) Viewed 61 times

Problem 1 Consider the follower has the following motion characteristics: Rise to h=30 mm with a harmonic motion for 0-0 to 120°, • Dwell at h - 30 mm for 0-120° 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 00 0 30 60 90 120 180 210 240 270 300 y (mm) 0 360 0 (6) Sketch roughly the following diagrams (versus cam angle (0) where 03 0360): o follower displacement diagrams o follower velocity diagram o follower acceleration diagram, (b) If 0-10 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=hy=0,7" = 0 At 0-B.y = 0, y'=0.y" = 0 Problem 3 Use the displacement diagram in Problem 1 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 8-60 and 240 Problem 4 Consider the follower has the following motion characteristics: • Rise to h 40 mm with a cycloidal motion for 0-0 to 120°. • Dwell at h = 40 mm for 0-120to 0 240 Return (fall) to 0 mm with a harmonic motion for 0 - 240 to 0 - 360° (a) Fill the following table 30 60 90 120 240 270 300 330 y (mm) (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 0 3360): o follower displacement diagrams o follower velocity diagram o follower acceleration diagram, 0 0 360 0