Page 465 - Cam Design Handbook
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THB14 9/19/03 7:58 PM Page 453
CHAPTER 14
SPECIAL CAM MECHANISMS
Harold A. Rothbart, D. Eng.
14.1 SLIDING BODIES 454 14.22 CONTROLLED TRANSLATING CYCLE
14.2 ROLLING BODIES 456 CAMS 477
14.3 ROLLING BODIES OF BASIC 14.23 CIRCULAR ARC CAMS—CONSTANT
CONTOURS 457 BREADTH FOLLOWER 477
14.4 INVOLUTE CAM 459 14.24 SWASH PLATE CAM 479
14.5 ECCENTRIC CIRCLE CAM— 14.25 VARIABLE-ANGULAR-VELOCITY
TRANSLATING ROLLER CAM 480
FOLLOWER 460 14.26 CAM INTERMITTENT-MOTION
14.6 ECCENTRIC CIRCLE CAM— MECHANISMS 481
TRANSLATING FLAT-FACED 14.26.1 Comparison of Intermittent-Motion
FOLLOWER 463 Mechanisms 481
14.7 CONTOUR-SHAPED RADIAL 14.26.2 Cylindrical Cam for Intermittent
CAMS 464 Motion 484
14.7.1 Special Contour 464 14.26.3 Grooved Concave Globoidal Cam
14.7.2 Circular Arc Cams 465 for Intermittent Motion 486
14.8 CIRCULAR ARC CAM—TRANSLATING 14.26.4 Spider Cam for Intermittent
ROLLER FOLLOWER 465 Motion 487
14.9 TANGENT CAM—TRANSLATING 14.26.5 Multiple Double-End Cam for
ROLLER FOLLOWER 466 Intermittent Motion 488
14.10 CIRCULAR ARC CAM—TRANSLATING 14.26.6 Star-Wheel Cam for Intermittent
FLAT-FACED FOLLOWER 467 Motion 489
14.11 BALL AND GROOVE CAM 468 14.27 CAM-MODULATED MECHANISMS 489
14.12 SPIRAL CAM CUTTING 14.27.1 Cam-Modulated Stamping
MECHANISM 468 Mechanism 489
14.13 UNIDIRECTIONAL CAM 14.27.2 Cam-Modulated Worm and Worm
CLUTCHES 470 Gear 490
14.14 TWO INDEPENDENT CAMS IN SERIES 14.27.3 Cam-Modulated Epicyclic Gears and
(AUTOMOTIVE) 471 Moving Cam (Type 1) 492
14.15 QUICK ACTION CAMS 471 14.27.4 Cam-Modulated Epicyclic Gearing
14.16 VARIABLE-DWELL CAM 472 and Moving Cam (Type 2) 492
14.17 CAM TO CONVERT LINEAR TO ROTARY 14.27.5 Cam-Modulated Epicyclic Gearing
MOTION 473 and Fixed Cam 492
14.18 CAM TO CONVERT ROTARY TO LINEAR 14.27.6 Cam-Modulated Noncircular
MOTION 474 Gears 493
14.19 TWO-REVOLUTIONS-PER-CYCLE 14.28 CAM COMPUTING MECHANISMS 494
CAMS 474 14.28.1 Cam Types 495
14.20 INCREASED STROKE CAMS 475 14.28.2 Archimedes Spiral Gear Cam 497
14.21 ADJUSTABLE STROKE CAMS 475 14.28.3 Basic Spiral Cam (Nonlinear) 498
14.28.4 Basic Spiral Cam Constants 501
SYMBOLS
c e = p 0 + p i = distance between centers of rotation, in
C = a constant
D = effective diameter of rollers, in
E = distance from cam center to circular arc center of curvature, in
h = 2E = maximum displacement of follower, in
K i, K 0 = constants
M = equivalent mechanism connecting rod length, in
r = instantaneous radial distance from center of cam, in
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