Page 901 - MiSUMi FA Mechanical Components Economy Series

Economy Series
Example of Use / Selection Method Anti-vibration Rubber Mounts

2Example of Customer Use
· Suitable for the prevention and weakening of vibration phenomena generated by vibrating equipment. For
example, anti-vibration rubber mount is often used to prevent the impact of external vibration factors on
precision equipment

Compression Support Shear Support Inclination Support

2 Selection Method

2STEP 1
Determine spring constant
· Assuming that the equipment is now vibrating in the vertical direction under force,
the formula for the conductivity Tr is as follows:
u: Vibration ratio
f f: Vibration number of the machine itself (Hz)
U=
fn
fn: The number of inherent vibrations during
machine damping (Hz)
Example
F: Exciting force transmitted by the
F 1 machine to the base (N)
Tr= =
FO 1-U 2 Fo: Exciting force of the machine itself (N)
· The weight m of the vibration-damping
· Tr is the conductivity, and the vibration damping effect machinery required by the customer is
is available only when the conductivity is <1, that is u> 2 100kg, the number of vibrations f
¥
* When u=2~4, that is, when the conductivity is 7%~33%, the occurring in the machinery is 16Hz, and fn
vibration damping effect is the best is 8Hz Calculate according to the formula 18
· The anti-vibration rubber mount can be selected
by calculating the appropriate spring constant Ks (2ʌ×16) ×100
2
according to the following formula ks= =180(N/mm)
2 ×1.4×1000
2
m: Machine mass (kg) Mounts/ Trims Anti-vibration Rubber
2
(2ʌf) m
ks= Į: When the Shore hardness of The spring constant of 180N/mm is
2
u ×Į×1000 natural rubber is 60, Į is 1.4 obtained.
* The above formula requires confirmation of the weight m of the equipment above the anti-vibration rubber mount,
the vibration number f of the machine itself and the desired vibration number fn (after vibration damping).
· Depending on how the equipment is Rubber Mounts Anti-vibration
2STEP 2 mounted, two external threads are required.
Select the appropriate installation type Selected C-VV Series P.897
of anti-vibration rubber mount
2STEP 3 Required thread specification M6, Trims
height 20mm
Select the appropriate size of
anti-vibration rubber mount P.905
2 Model Selection Selected model: C-VV2520-18

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