Title:
CONTROL METHOD FOR STEPPING CYLINDER
Document Type and Number:
Japanese Patent JP2679910
Kind Code:
B2
Abstract:
PURPOSE: To conduct control to give an input value to a stepping motor in considering a flow characteristic and working load of oil flowing in a communication hole so that advance/retreat quantity of a piston rod in a cylinder main body may become a set value, so as to make an output value follow a specified setting with high accuracy.
CONSTITUTION: A spool valve 5 for controlling movement of a piston rod 3 is arranged in a pilot communication hole 4 formed in an external part of a cylinder main body 1 of the piston rod 3 arranged in a first oil pressure chamber 2 inside the cylinder main body 1, when this method is applied to a stepping cylinder S for vibrating a mold M of a continuous casting equipment. Advance/retreat motion of the piston rod 3 is made to follow movement of the spool valve 5 by means of controlling movement of this spool valve 5 by a stepping motor 9. The stepping motor 9 is made to control in considering passage flow quantities q1, q2 of two pilot communication holes and load acting on the piston rod 3 so as to make the advance/retreat quantity of the piston rod 3 become a specified vibration curve.
Inventors:
Suzuki Motomitsu
Application Number:
JP33733891A
Publication Date:
November 19, 1997
Filing Date:
December 20, 1991
Export Citation:
Assignee:
Hitachi Zosen Corporation
International Classes:
F15B9/09; (IPC1-7): F15B9/09
Domestic Patent References:
| JP57110801A | ||||
| JP6334302A | ||||
| JP63282069A | ||||
| JP2118201A | ||||
| JP3303A | ||||
| JP57192603A | ||||
| JP5810004Y2 |
Attorney, Agent or Firm:
Yoshihiro Morimoto
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