2.

Operating

conditions

3.

Specifications

and operational

instructions

4.

Calculation

of kinetic

5.

Calculation

of thrust

6.

Calculation of

corresponding

mass of

impacting

object Me

7.

Selection

of RB0604

2.

Operating

conditions

3.

Specifications

and operational

instructions

4.

Calculation

of kinetic

5.

Calculation

of thrust

6.

Calculation of

corresponding

mass of

impacting

object Me

7.

Selection of

applicable

model

YES

≅ 0.125

≅ 0.157

of impacting object Me

b Selection of RB0604

YES

Me

≅ 2.3

1.

Type

of impact

υ

Kinetic energy

Thrust energy

Absorbed energy

E

mass of

impacting object

Me

Cylinder stroke at load (Horizontal)

υ

YES

≅ 2.3 J

≅ 9.4 J

of impacting object Me

b Selection of applicable

model

YES

Select RB2015

Me

≅ 260 kg

Model Selection

m = 1 kg

d = 10 mm

p = 0.5 MPa

n = 30 cycle/min

t = 25

°C

m = 50 kg

d = 40 mm

p = 0.5 MPa

n = 20 cycle/min

t = 25

°C

—·m·

1

2

2

1674

Shock Absorber

Technical Data:

Series

RB

RB0604 satisfies

Me = 2.3 < 3 kg

(Max. corresponding mass of im-

pacting object). Ultimately, it will

result in an operating frequency

of 30 < 80, without causing a

problem.

Use

the

Formula

“Absorbed

energy

calculate

Me. Substitute 0.282 for

E and 0.5 for

υ.

Model Selection Step

Selection Example

1. Type of impact

2. Enumeration of operating conditions

3. Specifications and operational instructions

Cylinder stroke at load (Horizontal)

Cylinder stroke at load (Downward)

Cylinder stroke at load (Upward)

Conveyor stroke at load (Horizontal)

Free horizontal impact

Free dropping impact

Rotating impact (With torque)

Symbol

m

υ

h

ω

R

d

p

F

T

n

t

μ

Operating condition

Impacting object mass

Collision speed

Dropping height

Angle speed

Distance between axis of

cylinder and impact point

Bore size

Cylinder operating pressure

Thrust

Torque

Operation cycle

Ambient temperature

Friction coefficient

Unit

kg

m / sec

m

rad/sec

m

mm

MPa

N

N · m

cycle / min

°C

—

Ensure that the collision speed, thrust,

operation cycle, the ambient temperature

and atmosphere fall within the specifications.

∗ Be aware of the min. installation radius in

the case of rotating impacts.

Using the equation suitable for the classifica-

tion of impact.

Select any shock absorber as a provisional

model.

Corresponding mass of impacting object

Me = —·E

2

υ ··· 0.3 < 5 (max.)

t ··· –10 (min.) < 25 < 80 (max.)

υ ··· 0.5 < 1.0 (max.)

t ··· –10 (min.) < 25 < 80 (max.)

Use

Formula to calculate E1.

Substitute 50 for

m and 0.3 for

υ.

Use

Formula to calculate E1.

Substitute 1.0 for

m and 0.5 for

υ.

Use the formula “Absorbed energy

to calculate

Me. Substitute 11.7 J

for

E and 0.3 for

υ.

ly selected RB2015 satisfies

Me

= 260 kg < 400 kg at

υ = 0.3. Ulti-

mately, it will result in an operat-

ing frequency of

n···20 < 25, with-

out causing a problem.

Substitute both absorbed energy

E and collision

speed

responding mass of the impacting object

Me.

Provisionally

select

a

model

RB2015 and make the use of

Data B

. According to

is obtained.

Provisionally

select

a

model

RB0604 and make the use of

. According to

d =

10,

In the case of thrust energy of cylinder

Cylinder

Load

Shock absorber

In the case of cylinder stroke at load and free horizontal impact,

7. Selection of applicable model

In order for the shock absorbers to operate

accurately for long hours, it is necessary to

select a model that is well-suited to your

operating conditions. If the impact energy is

smaller than 5% of the maximum energy

absorption, select a model that is one class

smaller.

Caution on Selection

Taking into consideration the corresponding

mass of the impacting object

Me, calculated

υ, check

provisional model compatibility with the

condition of application. If this is satisfactory,

then the said provisional model will be the

applicable one.

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