HGDT_EN.PDF - 第10页

Subject to c hange – 2017/04 10 è Internet: www .festo.c om/catalogue/... He avy-duty three-point grippers HG D T T echnical data High forc e – HGD T- … -F Gripping force F Gri p per gripper jaw as a function of operatin…

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2017/04 – Subject to change
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è Internet: www.festo.com/catalogue/...
Heavy-duty three-point grippers HGDT
Technical data
High force – HGDT-…-F
Gripping force F
Grip
per gripper jaw as a function of operating pressure and lever arm x
The gripping forces as a function of
operating pressure and lever arm can
be determined from the following
graphs.
External gripping (closing)
HGDT-25-A-F HGDT-35-A-F
HGDT-40-A-F HGDT-50-A-F
HGDT-63-A
3 bar
6 bar
8 bar
Subject to change – 2017/04
10
è Internet: www.festo.com/catalogue/...
Heavy-duty three-point grippers HGDT
Technical data
High force – HGDT-…-F
Gripping force F
Grip
per gripper jaw as a function of operating pressure and lever arm x
The gripping forces as a function of
operating pressure and lever arm can
be determined from the following
graphs.
Internal gripping (opening)
HGDT-25-A-F HGDT-35-A-F
HGDT-40-A-F HGDT-50-A-F
HGDT-63-A-F
3 bar
6 bar
8 bar
2017/04 – Subject to change
11
è Internet: www.festo.com/catalogue/...
Heavy-duty three-point grippers HGDT
Technical data
Spring force F
S
as a function of size, gripper jaw stroke l and gripper length x, per gripper finger
Gripping force retention for HGDT-…-G…
The spring forces F
S
as a function of
the gripper jaw stroke can be deter
mined from the following graph.
Standard – HGDT-… High force – HGDT-…-F-…
HGDT-25-A-G…
HGDT-35-A-G…
HGDT-40-A-G…
HGDT-50-A-G…
HGDT-63-A-G…
HGDT-25-A-F-G…
HGDT-35-A-F-G…
HGDT-40-A-F-G…
HGDT-50-A-F-G…
HGDT-63-A-F-G…
The lever arm x [mm] must be taken
into consideration when determining
the actual spring force F
Stotal
.
The formulae for calculating the
spring force are provided in the table
below.
Size F
Stotal,
per gripper finger
Standard – HGDT-… High force – HGDT-…-F
25 –0.3* x+0.85* F
S
–2.24* x+0.64* F
S
35 –0.5* x+0.75* F
S
–0.97* x+0.7* F
S
40 –0.5* x+0.8* F
S
–1.45* x+0.66* F
S
50 –0.6* x+0.7* F
S
–0.97* x+0.51* F
S
63 –0.6* x+0.75* F
S
–2.35* x+0.72* F
S
Determining the actual gripping forces F
Gr
for HGDT-...-A-G1 and HGDT-...-A-G2 as a function of the application, per gripper finger
The three-point grippers with
integrated spring type HGDT-...-G1
(opening gripping force retention) and
HGDT-...-G2 (closing gripping force
retention) can be used as:
– single-acting grippers
– grippers with supplementary
gripping force and
– grippers with gripping force
retention depending on the
requirements.
In order to calculate the available
gripping forces F
Gr
(per gripper finger),
the gripping force (F
Grip
) and spring
force (F
Stotal
) must be combined
accordingly.
Application forces per gripper finger
Single-acting Supplementary gripping force Gripping force retention
Gripping with spring force:
F
Gr
= F
Stotal
Gripping with pressure force:
F
Gr
= F
Grip
– F
Stotal
Gripping with pressure and spring
force:
F
Gr
= F
Grip
+ F
Stotal
Gripping with spring force:
F
Gr
= F
Stotal