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Pneumatic Cylinders 1

Apr 05, 2018

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    Step

    Obtain the bore of the cylinder tube. Refer to Graphs 1 and 2.

    qDetermine the load factor in accordance with the purpose.

    Purpose of operation

    Static operation (clamping, low speed vise crimping, etc.)

    Dynamicoperation

    Horizontal movement of load on guide

    Vertical and horizontal movement of the load

    Load factor

    0.7 or less(70% or less)

    1 or less(100% or less)

    0.5 or less(50% or less)(1)

    Note 1) If it is particularly necessary to operate at high speeds,the load rate must be reduced further. (In the graph, it ispossible to select a load rate of 0.4, 0.3, 0.2, or less.)

    wDetermine the operating pressure.

    Generally, set the regulator to 85% of the source air pressure.

    (In the graph, a selection between 0.2MPa and 0.8MPa is possible.)

    eDetermine the direction in which the cylinder force will be used.

    Extending side Refer to Graph 1.

    Retracting side Refer to Graph 2.

    Note: If the same load is applied both for pushing and pulling in ahorizontal operation, set the direction to the pulling side.

    Take the impact at the stroke end into consideration.

    qWhen an external stopper (shock absorber, etc.) is provided to

    absorb the impact, select a stopper with sufficient absorption capacity.

    wStopping the piston with the cylinder without a stopper:

    Verify in Graphs 3 to 7 the absorption capacity of the cushion that is

    enclosed in the cylinder.

    1) Rubber bumper: Urethane rubber is used for preventingmetal-to-metal contact between the pistonand the cover.

    2) Air cushion: The air in the exhaust side is compressedslightly before the stroke end, and its reactionforce absorbs the kinetic energy of the load,thus enabling the piston to stop quietly.

    The aspects indicated below may need to be taken into

    consideration, depending on how the cylinder is operated.qIf a lateral load is applied to the piston rod:

    Verify in Graphs 8 to 11 whether the lateral load is within an allowable

    range.

    wWhen using a cylinder with a relatively long stroke, if a buckling force

    acts on the piston rod or the cylinder tube, verify in the table whether

    the stroke or the operating pressure is within a safe range.

    Obtain the cylinder's air consumption and required air volume.

    Obtain the air consumption (Graphs 12, 13) that is necessary forselecting a compressor and for calculating the running cost and the

    required air volume (Graph 14) that is necessary for selecting equipment

    such as an air filter or a regulator, or the size of the piping upstream.

    Technical data for air cylinders

    For detailed technical data other than the air cylinder model

    selection procedure, refer to p.5.6-1 to 5.6-8.

    Data 1: Tube Bore Selection (p.5.6-2 to 5.6-5)

    Data 2: Air consumption and Required Air volume (p.5.6-6)

    Data 3: Theoretical Force Table (p.5.6-7 and 5.6-8)

    1

    Step

    2

    Step

    Step

    3

    4

    Series MB

    Series CJ2

    Series CM2

    Series CG1

    Series CA1

    Series CS1

    Series CQ2

    Air Cylinder Model Selection Procedures

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    Air Cylinder Model Selection Procedures

    Obtain the bore of the cylinder tube. Refer to Graphs 1 and 2.

    Example 1: If a minimum force of 1000N is necessary to keep theworkpiece pressed as shown in Fig. 1, because this is the

    extending side, use Graph 1 to determine the load factor of 0.7and the operating pressure of 0.5MPa. Then, seek the pointat which the cylinder force of 1000N intersects, and this willresult in a bore size of 63mm.

    Example 2: To move a load with a 30kg weight horizontally on a guide asshown in Fig. 2, because the load is the same for both thepushing and retracting sides, use Graph 2, which is theretracting side with a smaller force. Determine the load factorof 1, and the operating pressure of 0.4MPa. Then, seek the

    point at which it intersects with the load weight of 30kg, andthis will result in a bore size of 40mm.

    Example 3: To pull a load with a 100kg weight vertically upward as shown

    in Fig. 3, use Graph 2 to determine the load factor of 0.5 andthe operating pressure of 0.5MPa. Then, seek the point at whichit intersects with the load weight of 100kg, and this will result ina bore size of 80mm.

    Conversion to gravitational units

    1MPa 10.2kgf/cm2 1N 0.102kgf1kgf/cm20.098MPa 1kgf 9.8N

    Step

    1

    P=0.4MPa

    W

    Fig. 2

    30kgP=0.5MPa

    Fig. 3

    W

    100kg

    Fig. 1

    P=0.5MPa

    Example: Example:

    600005000040000

    300002500020000

    15000

    10000

    50004000

    300025002000

    1500

    1000

    500400

    300250200

    150

    100

    5040

    302520

    15

    10

    54

    32.5

    2

    1.5

    10.80.8

    0.70.6

    0.50.4

    0.3

    0.2

    600050004000

    300025002000

    1500

    1000

    500400

    300250200

    150

    100

    5040

    302520

    15

    10

    54

    32.52

    1.5

    1

    0.50.4

    0.30.250.2

    0.15

    0.10.08

    CylinderforceF(N)

    Operatingpressure(MPa)

    Loadweightm(kg)

    Load factor ()

    300250

    200180160140125

    100

    80

    63

    50

    40

    32

    25

    20

    16

    10

    6

    300250

    200180160140

    125

    100

    80

    63

    50

    40

    32

    25

    20

    16

    10

    6

    1 0.70.5

    0.40.3

    0.2

    Retracting side cylinder force (Double acting cylinder)

    Bore size (mm)

    600005000040000

    300002500020000

    15000

    10000

    50004000

    300025002000

    1500

    1000

    500400

    300250200

    150

    100

    5040

    302520

    15

    10

    54

    32.5

    2

    1.5

    10.8

    0.70.6

    0.50.4

    0.3

    0.2

    600050004000

    300025002000

    1500

    1000

    500400

    300250200

    150

    100

    5040

    302520

    15

    10

    54

    32.52

    1.5

    1

    0.50.4

    0.30.250.2

    0.15

    0.1

    CylinderforceF(N)

    Operatingpressure(MPa)

    Loadweightm(kg)

    Load factor ()

    300

    250

    200180160140125

    100

    80

    63

    50

    40

    32

    25

    20

    16

    10

    6

    300

    250

    2001801601401

    25100

    80

    63

    50

    40

    32

    25

    20

    16

    10

    6

    1 0.70.5

    0.40.3

    0.2

    Extending side cylinder force (Double acting cylinder)

    Bore size (mm)

    0-19

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    Take the impact at the stroke end into consideration.

    How to view the Graphs

    Example 1: According to Graph 3, to move a load weight of 50kg using CM2-40A, it is necessary to set the maximum speed at

    300mm/s or less, considering the capacity of the air cushion.

    Cylinder with an air cushion

    CJ2

    CM2

    CG1

    CA1

    CS1

    Step

    2

    200

    100

    50

    30

    20

    10

    5

    3

    2

    1

    0.4

    0.3

    0.2

    100 200 300 500 1000

    Load(kg)

    Max. speed (mm/s)

    Series CJ2/CM2

    CM2-40

    CM2-32

    CM2-25

    CM2-20

    CJ2-16

    CJ2-10

    1000

    500

    300

    200

    100

    50

    30

    20

    10

    5

    3

    2

    1

    0.5

    Load(kg)

    Max. speed (mm/s)

    Series CG1CG1-100

    CG1-80

    CG1-63

    CG1-50

    CG1-40

    CG1-32

    CG1-25

    CG1-20

    10000

    5000

    3000

    2000

    1000

    500

    300

    200

    100

    50

    30

    20

    10

    5

    100 200 300 500 1000100 200 300 500 1000

    Load(kg)

    Max. speed (mm/s)

    Series CA1/CS1

    CS1-300

    CS1-250

    CS1-200

    CS1-180

    CS1-160

    CS1-140CS1-125

    CA1-100

    CA1-80

    CA1-63

    CA1-50

    CA1-40

    Air Cylinder Model Selection Procedures

    0-20

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    Example 2: According to Graph 7, to move a load weight of 50kg at a maximum speed of 500mm/s, in the CG1 series, a bore size

    of 80 can be selected.

    Cylinder with a rubber bumper

    MB

    How to view the Graphs

    CJ2

    CM2

    CG1

    200

    100

    50

    30

    20

    10

    5

    3

    2

    1

    0.4

    0.3

    0.2

    0.1

    0.05

    100 200 300 500 750 1000

    Load(kg)

    Max. speed (mm/s)

    Series CJ2/CM2

    CM2-40

    CM2-32

    CM2-25

    CM2-20

    CJ2-16

    CJ2-10

    CJ2-6

    1000

    500

    300

    200

    100

    50

    30

    20

    10

    5

    3

    2

    1

    0.5

    100 200 300 500 1000

    Load(kg)

    Max. speed (mm/s)

    Series CG1CG1-100

    CG1-80

    CG1-63

    CG1-50

    CG1-40

    CG1-32

    CG1-25

    CG1-20

    1000

    500

    300

    200

    100

    50

    30

    20

    10

    5

    4

    3

    2

    100 200300 500 1000 2000

    Load(kg)

    Max. speed (mm/s)

    Series MB

    MB100

    MB80

    MB63

    MB50

    MB40

    MB32

    Air Cylinder Model Selection Procedures

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    Bushing (Bearing)fR

    The aspects indicated below may need to be taken into consideration, depending on how the cylinder is operated.

    qThe maximum stroke at which the cylinder can be operated under a lateral load.The region that does not

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