Cylinder driven index table 01
Application Overview
Purpose
Purpose
To rotate workpieces on 8-position index table.
Operation
Retracting the (indexing) cylinder, removes the finger from the groove of the indexing gear.
When the (rotation) cylinder is extended, the claw engages the ratchet gear and the index table rotates. The tension springs keeps the claw pressed against the gear.
When the (indexing) cylinder is extended, the finger is inserted into the groove to fix the rotational position.
Target workpiece
Shape: connector
Size: W50 x D50 x H30 mm
Weight: 0.15 kg
Design Specifications
Operating Conditions or Design Requirements
Movement angle: 45degrees
Cylinder stroke: 100mm
Stopper stroke: 10mm
Outer dimensions: φ600 x H114mm
Selection Criteria for Main Components
Selected an air cylinder that has the thrust specification required to rotate the index table 45 degrees in 1 second.
Design Evaluation
Verification of main components
Air Cylinder thrust calculation
Conditional value: angle θ = 45degrees, movement time t = 1sec., link arm length L = 0.125m, moment of inertia applied to air cylinder I = 0.5492kg·m²
As uniform acceleration motion is assumed as angular velocity here, θ: oscillating angle (rad), 45° = 2π/8rad
Angular velocity after t seconds: ω = 2·θ/ｔ = 2 x (2 π/8)/1 = 1.571rad/sec
Equation of rotary motion: from I·ω = M and M = F·L, cylinder thrust F = I·ω/L = 0.5492 x 1.571/0.125 = 6.9N
Theoretical thrust of φ40 air cylinder: 628 (N) when air pressure in use is