MA0886RHG
38
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Consider the hydraulic circuit design so that the operation is easy and no
mistakes in operation occur.
Attempt failsafe for the circuit so as not to cause any accidents even in the case
of blackout. (Fig. 17)
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It is incorporated with a lock mechanism (lock valve) to maintain the specified
gripping force even if the supplied pressure abnormally drops due to blackout
or malfunction of the pressure resource while processing a work, however, it
does not function unless the following warnings are observed.
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Additionally, the solenoid valve is to be in a circuit to retain the gripping port
position when no electric current is carried.
The switching of the cylinder is to be 4 port 2 position with electromagnetic
valve, and design the hydraulic circuit which grips the work in the state that
the solenoid valve is degaussed.
If the circuit is designed in the opposite way, if there is a blackout, the work
could be released and fly out.
・
Provide a valve to switch over the inside and outside diameter gripping to
prevent an operation mistake when changing the gripping.
Additionally, when a solenoid valve is used as this switching valve, use a 4
port 2 position valve with a position stopper that can retain the indicator
circuit at the time of blackout.
Fig. 17
10. About Hydraulic Circuit Design
