Welding fixture index table: which shock absorber?

Index table, J = 20 kg·m², 100 N·m drive. Watch the 35-second explainer, check the calculation, then open the same example in ImpactCal and change it to your own machine.

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Inputs (SI units)

Inertia J	20 kg·m²
Speed ω	1 rad/s
Torque M	100 N·m
Torque radius r	0.5 m
Absorber radius R	0.5 m
Cycles C	120 /h

Calculation

Kinetic energyE1 = ½·J·ω² = ½·20·1²	10 J
Impact velocityv = ω·R = 1·0.5	0.5 m/s
Drive energyE2 = (M / r)·s = (100 / 0.5)·0.020	4 J
Energy per cycleE3 = E1 + E2	14 J
Energy per hourE4 = E3·C = 14·120	1 680 J/h
Effective massme = 2·E3 / v²	112 kg

s = stroke of the selected model · g = 9.81 m/s²

ImpactCal selection

AC-20-20

Best-centred utilisation

Stroke20 mm

Stopping force875 N

Deceleration7.8 m/s²

Stopping time0.100 s

Open this example in ImpactCalSize my own application