PURPOSE: To ensure the intermittent movement of a fluid pressure actuator by enabling the easy installation thereof on an existing circuit in such a way that an intensifying piston and a change-over valve for the reciprocating motion thereof are repeatedly actuated on a pressurized fluid, and the fluid is intermittently discharged from a load passage.
CONSTITUTION: When a solenoid changeover valve 37 has been turned to the right side, a cylinder 36 is controlled in respect of speed and moves to the right side, thereby causing a pressurized fluid for a circuit 41 to move a piston 2 to the left side, and flow into and fill an intensifying chamber 8. At this stage, a pressurized fluid in a pressure passage P flows into an application chamber 11 and a change-over valve body 3 is kept at the right side position. As soon as an operation member 30 has contacted a retaining member 31, a change-over valve body 4 moves to the left side, thereby changing over application chambers 11 and 12 for continuity to a discharge passage R and said passage P respectively, while a valve body 3 is made to move to the left, thereby changing over connecting passages 13 and 14 for continuity to said passages P and R respectively. Thereafter, the piston 2 moves to the right, thereby causing an increase in fluid pressure within the intensifying chamber 8, delivering the fluid from a load passage A to a circuit 42 for retreating the cylinder 36. As a result, the valve body 4 moves to the right, due to contact by a member 30 and causes the valve body 3 to restore the original position. In this way, the cylinder 36 repeats motion back and forth for intermittent machining feed.
JPH05104316 | COUNTER BORING DEVICE |
JPH08108306 | CUTTING CONTROLLER |
ISHIKAWA MASATO
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