MA0886RHG
22
< Treatment when the cylinder cannot be operated >
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Regardless of trial operation or normal operation, when the cylinder cannot be operated,
try the operations specified below.
1. When the lathe spindle is rotating, stop rotation.
2. Turn the pressure adjusting handle of the pressure regulation valve for the chuck setting
pressure (cylinder setting hydraulic pressure) at the hydraulic unit part, and raise the
chuck setting pressure for about 0.5 MPa and repeat switching over the operation
selecting switch of the cylinder to check the operation of the cylinder.
3. If the operation inability still continues, raise the chuck setting pressure additionally
(about 0.5 MPa at a time), and repeat the operation in the same manner as item (2), to
check the action of the cylinder. In this case, the limit of the pressure raising is up to
30% increase of the maximum operating hydraulic pressure.
When the cylinder operation is recovered, bring back the preset chuck pressure to the
normal level.
4. If the cylinder cannot be operated even after the chuck setting pressure is raised to the
maximum and the operation specified in the above item (3) is repeated several times,
return to the chuck setting pressure, turn off the power supply, cool down the
temperature of the cylinder surface to be almost the same as the room temperature, and
then repeat the operations specified in the above items (2) and (3) to check the
operation of the cylinder.
The cylinder can be cooled down more quickly by forcibly blowing air to the cylinder
using an air gun, etc.
5. If the cylinder cannot be operated even after cooling down, loosen the draw screw on
the chuck side and remove the connection, and then check the operation of the cylinder.
< Usage >
This product is a hydraulic device to control the operation of power chuck installed on the
lathes or rotary tables.
The piston moves forward and backward by supplying hydraulic pressure to the cylinder. By
this, the linked jaws of the power chuck move toward the closing side to grip the workpiece,
so that the workpiece is clamped during the machining. After the machining, the jaws move
toward the open side to allow the workpiece to be removed.
