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2_Kap_VT_EN_2016_VT_KAT 18.02.16 09:36 Seite 47
PA01019111_inh_EN.pdf
Vacuum Knowledge
System Design – Calculation Example
PA01019111_inh_EN.pdf Load case I – Suction cup horizontal, direction of force horizontal PA01019111_inh_EN.pdf

The workpiece (in this case the steel sheet with the dimensions 2.5 x 1.25 m) is lifted up vertically and transported horizontally.
The acceleration is 5 m/s². Schmalz - The Company

F = m x (g + a) x S F
TH TH
F = theoretical holding force [N]
TH
m = Weight [kg]
2
g = Gravity [9.81 m/s ] Vacuum Knowledge
2
a = Acceleration [ m/s ] of the system
S = Safety factor
F G
Our example: Vacuum Suction Cups
2
F TH = 61.33 kg x (9.81 m/s² + 5 m/s /0.5) x 1.5
F TH = 1,363 N The suction cups land on a workpiece vertically that is to be
lifted up.
Load case II – Suction cup horizontal, direction of force horizontal Special Grippers
The workpiece (in this case the steel sheet with the dimensions 2.5 x 1.25 m) is lifted up vertically and transported horizontally.
The acceleration is 5 m/s².
F = m x (g + a/µ) x S F
TH TH Vacuum Grip- ping Systems
F TH = theoretical holding force [N]
F a = Acceleration force = m x a
m = Weight [kg]
2
g = Gravity [9.81 m/s ]
2
a = Acceleration [m/s ]of the system Mounting Elements
µ = Friction coefficient
S = Safety factor F G F a
Our example: The suction cups land on a workpiece horizontally that is to be Generators
F TH = 61.33 kg x (9.81 m/s² + 5 m/s² /0.5) x 1.5 moved to the side. Vacuum
F TH = 1,822 N

Load case III – Suction cup vertical, direction of force vertical Technology
Description of load case: The workpiece (in this case the steel sheet with the dimensions 2.5 x 1.25 m) is picked up from a pallet and Valve
moved with a rotary motion at an acceleration of 5 m/s².
F = (m/µ) x (g + a) x S
TH Switches and
F = theoretical holding force [N] Monitoring
TH
m = Weight [kg]
2
g = Gravity [9.81 m/s ]
2
a = Acceleration [m/s ] of the plant F TH
μ = Friction coefficient Filters and Connections
S = Safety factor
Our example:
2
2
F = (61.33 kg /0,5) x (9.81 m/s + 5 m/s ) x 2
TH
F = 3,633 N Services
TH
Comparison:
For our scenario, the workpiece is lifted off a pallet, moved to the F G
side and placed on a machining center. The rotary motion from
load case III is not needed in this application, therefore one only Contact
needs to consider the result from load case II.

The result in this case is a maximum theoretical holding force Produktindex Produktindex Produktindex
(F ) of 1,822 N. This theoretical holding force acts on the suction The following calculations are based on this value to safely solve Index of Products
TH
cup during horizontal transport of the workpiece. the task.
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PA01019111_inh_EN.pdf