Today, I am sharing animations illustrating the operating principles of 13 common self-centering clamping mechanisms-clear and intuitive!
1. Self-centering fixture 1
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Green double-eccentric cams and two blue wedge-shaped sliders center the yellow workpiece both laterally and longitudinally.
2. Self-centering fixture 2
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An orange screw with left- and right-hand threads moves V-blocks to center the yellow workpiece laterally and longitudinally. Blue pins and screws (in the lower part of the base) are used to adjust the fixture's center position in the longitudinal direction.
3. Self-centering fixture 3
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An orange screw with left- and right-hand threads moves V-blocks to center the yellow workpiece laterally and longitudinally. A blue nut and red screw on the green slider are used to adjust the center position longitudinally.
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Regarding this adjustment, the final scene of the animation shows how to move one V-block while keeping the other stationary.
4. Self-centering fixture 4
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A pink cam lever controls the clamping process, while a red spring maintains contact between the cam and the pusher. It can also be used in dies for stamping undercuts into workpieces (made of soft metal).
5. Self-centering fixture 5
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Two symmetrical face cams center the yellow workpiece longitudinally.
6. Self-centering fixture 6
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Two symmetrical V-shaped levers center the yellow workpiece longitudinally.
7. Self-centering fixture 7
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Green links forming a parallelogram mechanism center the yellow workpiece longitudinally.
8. Self-centering fixture 8
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V-blocks (one fixed, one movable) center the yellow workpiece longitudinally.
9. Self-centering fixture 9
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The yellow workpiece is centered longitudinally when it contacts both pairs of pink rollers. This fixture is used in a bamboo longitudinal cutting machine; the red blade remains stationary. 10. Self-centering fixture 10
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Rotate the orange and yellow gear sets to clamp the brown workpiece. Two gray pads center the workpiece along its longitudinal axis.
Centering condition: R1/R3 = R2/R4 (angular velocities of the blue and green gears are equal).
Relationship of gear pitch radii: R4 = R1 + R2 + R3.
R1, R2, R3, and R4 are the pitch radii of the orange, yellow, blue, and green gears, respectively.
11. Self-centering fixture 11
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Multi-piece clamping. V-blocks center the yellow workpiece longitudinally; compression springs are placed between the V-blocks.
12. Self-centering fixture 12
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A hydraulic cylinder clamps the workpiece (orange) using a green wedge on the piston, two pins, and two yellow levers. A pink V-block centers the workpiece longitudinally.
13. Self-centering fixture 13
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A floating cylinder moves the two pink jaws synchronously. The slider-crank mechanism formed by the orange linkage bears minimal load and ensures equal displacement of the two jaws.
