JPH0524432Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a drive control device for a turret head for mounting cutting tools such as lathes.

BACKGROUND TECHNOLOGY AND PROBLEMS Conventional devices for driving and controlling turret heads include those using an intermittent drive method using a cam and those using a continuous drive method using a hydraulic motor or electric motor. The former method does not allow high-speed indexing, and the latter method is preferably a continuous drive type index drive method as shown in Figure 2, but even with this method, if the inertia of the rotating body becomes large, the rotation stop position will be unstable. Therefore, there were problems in that high-speed indexing was not possible and a separate device for positioning was required.

Means for Solving the Problems The present invention relates to an improvement of the method shown in FIG. It is equipped with an index motor that performs rotational positioning using a hydro-mechanical method, with a built-in turret head, a pilot pressure and mechanical operation switching valve, and an electromagnetic operation valve for rotation direction control, and three control ports: clamp, unclamp, and common. A turret head drive control device comprising an index motor device having an index motor device, the device being equipped with a pilot pressure control device for controlling the interlock between the clamping and unclamping of the turret head and the rotation by the index motor by hydraulic switching. A main control valve is interposed between the cylinder of the piston and the index motor device, and further includes a pilot pressure shutoff valve for the main control valve, which is operated using the forward and backward strokes of the piston rod. This provides a turret head drive control device that does not have the above-mentioned problems.

Function During ramping, the pressure oil from the clamp control port (CL port) of the Intex motor device enters the CL port of the cylinder of the turret body, the piston is moved in the clamping direction, the turret head is clamped to the turret body, and the cylinder is released. The oil on the clamp side is drained.

At the same time, the shut-off valve is pushed by the piston rod and moves to the shut-off position, cutting off the pilot pressure of the main control valve.

During unclamping, pressure oil from the unclamping control port (UN port) of the index motor device passes through the main control valve to the UN of the cylinder.
The piston is moved in the unclamping direction, the turret head is separated from the turret body and unclamped, and at the same time the oil on the clamp side of the cylinder is discharged from the CL port.

The shut-off valve is then actuated using the unclamping stroke of the piston rod, and is moved from the pilot pressure cutoff position to the conduction position, and the pilot pressure is applied to the main control valve, so that the main control valve is actuated. By operating the main control valve, the destination of the pressure oil from the UN port of the index motor device is switched from the piston to the CO port of the index motor device, and the index motor is rotated to the unclamping position. The turret head located in the cylinder is rotated, and at the same time, the UN port of the cylinder is opened to the discharge side by switching the main control valve.

When the index motor and the turret head are rotated to a predetermined position, the operation switching valve of the index motor device is mechanically operated, and the pressure oil is switched from the UN port side to the CL port side to switch the pressure oil passage. Pressure oil to the off valve and the index motor are cut off, rotation of the index motor and turret head is stopped, and pressure oil is supplied to the cylinder.
A voltage is applied to the CL port, causing the piston and turret head to move toward the clamp side, and at the same time, the UN port is opened to the discharge side.

Also, since the pilot pressure is cut off, the main control valve operates as a spring return valve and returns to the initial clamp position.

Embodiment The structure of the present invention will be described below with reference to the embodiment shown in FIG.

The turret head 1 is connected to a piston rod 5 of a piston 4 that can move back and forth within the cylinder 3 of the turret body 2, and is engaged by a coupling 6 in the direction of unclamping (UN) (arrow A) in which it is separated from the turret body 2. It is movable in the direction of the clamp (CL) (arrow B), and is also rotatable in the direction of the double arrow C by an index motor 8 via a rotary shaft 7.

The index motor device 9 has a known configuration and is switched and operated by the index motor 8, an electromagnetic operation valve 10 for controlling on/off and rotational direction of the motor 8, pilot pressure, and mechanical operation of the index motor 8. It consists of a mechanically operated switching valve 11 and a pilot switching valve 12 for switching the pilot pressure of the switching valve 11, and three control ports, CO (common), UN (unclamp), and CL (clamp), are provided on the output side. .

A main control valve device 1 is provided between the cylinder 3 of the piston 4 and the index motor device 9.
3 is interposed. The main control valve device 13 is provided with a pilot pressure operated main control valve 14 for controlling the interlock between the clamping and unclamping of the turret head 1 and the rotation by the index motor 8 by hydraulic switching, and a passage. .

The passage includes a CL passage 1 which connects the CL port 16 communicating with the clamp side chamber 15 of the cylinder 3 and the CL port of the index motor device 9;
7. UN passage 18 connecting the UN port and main control vibe 14; main control valve 1;
4 and the UN port 20 communicating with the unclamping side chamber 19 of the cylinder 3, a CO passage 22 connecting the CO port and the main control valve 14, and the UN passage 18 and the shaft of valve 23. a pilot passage 24 connecting the
A pilot passage 26 connecting the shaft-off valve 23 and a pilot end 25 of the main control valve 14 and a drain passage 27 of the main control valve 14 are provided. A check valve 28 which is operated is provided in the drain passage 29 from the pilot passage 26, and a check valve 30 which is pilot operated by the internal pressure of the CL passage 17 is provided. When the turret head 1 is clamped, pressure oil from the CL port of the index motor device 9 enters the clamp side chamber 15 of the cylinder 3 from the CL port 16 of the cylinder 3 through the CL passage 17 and the check valve 28.
The piston 4 is moved in the direction of the clamp (CL) shown by arrow B, and the turret head 1 is moved toward the coupling 6.
The oil in the unclamp side chamber 19 of the cylinder 3 is clamped to the turret body 2 through the UN port 2.
0, UN passage 21, main control valve 14, UN
It is discharged through passage 18 and the UN port. At the same time, the shaft-off valve 23 is pushed by the piston rod 5 and moved to the shaft-off position, the pilot passages 24 and 26 are cut off, and the pilot pressure applied to the pilot end 25 of the main control valve 14 is cut off.

FIG. 1 shows the above-mentioned situation.

When unclamping the turret head 1,
Pressure oil from the UN port of the index motor device 9 flows through the UN passage 18, the main control valve 14, and the UN port.
It enters the unclamping side chamber 19 of the cylinder 3 from the UN20 port of the cylinder 3 through the passage 21, the piston 4 is moved in the unclamping (UN) direction shown by arrow A, and the turret head 1 is separated from the turret body 2 and unclamped. It is rotatable, and the oil in the clamp side chamber 15 flows through the CL port 16 and the UN passage 21.
It is discharged through the check valve 28 pilot operated by internal pressure, the CL passage 17, and the CL port.

Next, by the backward stroke of the piston rod 5 in the direction of arrow A, the shutter off valve 23 is actuated with a spring offset, and the pilot passage 2 is opened.
4, 26 is moved from the blocking position to the conducting position,
Pilot pressure from pressure oil from the UN port is applied to the pilot end 25 of the main control valve 14, and the main control valve 14 is operated in an offset manner. By the offset operation of the main control valve 14, the UN passage 18 and the CO passage 22 are communicated,
The CO port and the UN port are communicated with each other, and the index motor 8 is made rotatable.
is forced to rotate. At the same time, by switching the main control valve 14, the UN passage 21 and the drain passage 27 are communicated with each other, the oil pressure in the UN passage 21 disappears, and the turret head 1 can be immediately switched to the clamp position.

Note that it is preferable that a check valve be interposed on the conduction offset side of the shutoff valve 23.

When the index motor 8 and therefore the turret head 1 are rotated to a predetermined position, the mechanical operation switching valve 1 of the index motor device 9 is rotated.
1 is mechanically operated, and the pressure oil is switched from the UN port side to the CL port side in order to switch the pressure oil passage, and the pressure oil to the above-mentioned shut-off valve 23 is also cut off, and the rotation of the index motor 8 and the turret head 1 is stopped. is stopped, pressure oil is applied to the clamp side chamber 15 through the CL port 16 of the cylinder 3, the piston 4 and the turret head 1 are moved in the clamping direction of arrow B, and the turret head 1 is connected to the turret body 2 via the coupling 6. is engaged, and at the same time the UN port is communicated with the discharge side. In addition, the main control valve 14 is switched to the shut-off side by the operation of the piston rod 5, and the pilot passages 24 and 26 are shut off, and the check valve 30 is opened and the pressure at the pilot end 25 is lost. It returns to the original clamp position as shown in FIG.

Effects of the invention The present invention combines the turret head drive control device equipped with the conventional index motor device with a main control valve device and a piston rod actuated shut-off valve to control rotation and stop of the index motor and control of the turret head. The clamping and unclamping of the turret head can be operated quickly and reliably, and the interlock between the turret head's high-speed indexing and positioning and the unclamping and clamping can be performed quickly and reliably, resulting in stable machining accuracy and shortening of machining time. be able to.

Furthermore, since the main control valve device and the shut-off valve are designed to be compact, they can be integrated into the turret body. This effect can be achieved.

[Brief explanation of the drawing]

Figure 1 is a layout diagram including a partial cross section of the embodiment;
The figure is a layout diagram of a conventional example. 1...turret head, 1...turret body,
3... Cylinder, 4... Piston, 5... Piston rod, 8... Index motor, 9... Index motor device, 10... Solenoid operated valve, 1
1... Mechanical operation switching valve, 14... Main control valve, 23... Shut-off valve.

Claims (1)

[Scope of utility model registration request] The turret head is locked to the piston rod and can be clamped and unclamped from the turret body by the movement of the piston back and forth, and is rotatable. It is a hydraulic mechanical system with a built-in pilot pressure and mechanical operation switching valve and an electromagnetic operation valve for rotational direction control. An index motor is provided for rotational positioning.
In a turret head drive device comprising an index motor device having a control port, the main control valve operated by pilot pressure controls the interlock between clamping and unclamping of the turret head and rotation by the index motor by hydraulic switching. A shut-off valve for pilot pressure of the main control valve is provided, which is interposed between the cylinder of the piston and the index motor device and is operated using the forward and backward strokes of the piston rod. A drive control device for the turret head.