JPH0639863Y2 - Rotary table equipment - Google Patents

Description

The present invention relates to a rotary table device for a machine tool, and more particularly to a rotary table in which a distributor for supplying a pressure fluid to a clamp device or the like mounted on the rotary table is compactly incorporated. Regarding the device.

2. Description of the Related Art In a conventional rotary table device 70, as shown in FIG. 4, a rotary table 72 is rotatably supported on a fixed base 71 by a shaft portion 72a, and a conduction shaft 73 is provided at the center of the rotary table 72. Is rotatably inserted integrally with the rotary table 72 and is rotatably fitted to the distributor 74, and a pressure fluid is distributed from each port of the distributor 74 to attach a pressure fluid to the rotary table 72. Is configured to operate.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention However, since the above-mentioned conventional device has a structure in which the distributor 74 is arranged below the shaft portion 72a of the rotary table 72, the height of the rotary table device 70 is increased by the length of the distributor 74. The bulkiness in the vertical direction is increased, and therefore the rotary table when placed on the machine tool.
There is a problem that the machining range of the workpiece fixed on the rotary table 72 is narrowed because the 72 is supported at a high position.

Means for Solving the Problem A rotary table device in which a rotary table is rotatably supported by a fixed base, and a connection port for pressure fluid supply / discharge for operating a clamp device and the like attached to the rotary table is provided. At the outer peripheral surface of the rotary table, an annular fitting groove is provided, and a supply ring having a supply port capable of communicating with a fluid pressure source is relatively rotatably fitted into the fitting groove, and the fitting surface of the supply ring is An annular supply groove having a T-shaped cross section and communicating with the supply port is provided on the inner surface of the fitting groove, and an annular receiving groove facing the supply groove is provided on the inner surface of the fitting groove. The receiving groove and the connecting port are connected to the rotary table. And a ring-shaped packing having a communication hole in the supply groove, which is fitted to both edges of the receiving groove by fluid pressure so as to be crimpable.

Action When pressure fluid is supplied from the fluid pressure source to the supply port of the supply ring, the pressure fluid enters the supply groove of the supply ring and presses the ring-shaped packing onto both edges of the receiving groove of the mating groove of the rotary table. Prevent pressure fluid from leaking, and then enter the check valve from the communication hole of this packing to activate the check valve.The check valve is supplied through the connecting port to the clamp device on the rotary table, and the clamp device is Activate. When the supply of the pressure fluid is stopped, the packing is elastically restored and separated from both edges of the receiving groove to be in a non-contact state.Besides, the check valve prevents the backflow of the pressure fluid supplied by the check valve. The clamped state can be maintained. By thus supplying and discharging the pressure fluid from the supply ring fitted in the fitting groove of the rotary table device, the installation height of the rotary table device can be reduced, and the processing range of the workpiece can be widened. it can.

Embodiment In FIGS. 1 and 2, a rotary table device 1 includes a fixed base 2 fixed to a machine base of a machine tool and a rotary table 4 shown by a solid line. The rotary table 4 includes a main table 5 and an auxiliary table. The main table 5 is rotatably supported by the fixed base 2 by the shaft portion 5a, and is rotated by the rotation driving means (not shown). The main table 5 may be a table of a conventional rotary table device. The auxiliary table 6 is configured as follows. Reference numeral 7 is an annular supply main body, 8 is a disk-shaped table plate, and both 7 and 8 are fixed to each other by a bolt 9, and further the supply main body 7 is fixed to the main table 5 by a bolt 10. Reference numeral 14 denotes an annular supply ring which is relatively rotatably fitted in an annular fitting groove 12 formed by the supply body 7 and the table plate 8, and is fixed stationary with respect to the rotation of the rotary table 4. Supply ring 14 has supply ports 15, 16
And a supply port 15 and 16 are connected to a fluid pressure source (not shown). On the upper fitting surface of the supply ring 14, annular supply grooves 21 and 22 having a T-shaped cross section are provided concentrically, and further, annular grooves 23 and 24 are provided at the bottoms of the supply grooves 21 and 22. There is. Annular packings 25 and 26 having a large number of communication holes 25a and 26a are fitted in the supply grooves 21 and 22, respectively. The annular grooves 23, 24 and the supply ports 15, 16 are connected by passages 27, 28, respectively. On the lower surface of the table plate 8 which is the inner surface of the fitting groove 12, annular projections 31a, 31b and 32a, 32b are provided at positions corresponding to the supply grooves 21, 22, respectively, and these projections 31a, 31b and 32a are provided. , 32b are provided with annular receiving grooves 31, 32, which face the supply grooves 21, 22, respectively. Therefore, when the pressure fluid is supplied to the supply grooves 21 and 22, the packings 25 and 26 are crimped to the ridges 31a, 31b and 32a and 32b, respectively, and the reception groove 31 does not leak the pressure fluid to the outside from the communication holes 25a and 26a. , 32 can be supplied. Reference numeral 40 denotes a check valve fixed to the table plate 8 in the hollow hole 7a of the supply body 7, and the check valve 40 and the receiving grooves 31, 32 communicate with each other by passages 35, 36 provided in the table plate 8, respectively. Has been done. Reference numerals 43 and 44 denote connection ports opened on the upper surface of the table plate 8, which communicate with the check valve 40 by the passages 41 and 42, and supply and discharge the pressurized fluid to a clamp device (not shown) provided on the table plate 8. The check valve 40 prevents the backflow of the pressure fluid supplied to the receiving groove 31 or 32, and at the same time, these receiving groove 3
Although the pressure fluid is discharged to the other of the pressure fluids 1 and 32 by supplying the pressure fluid to one of them, the check valve 40 is disclosed in detail in, for example, Japanese Patent Publication No. 55-35564. Detailed description is omitted. Reference numeral 46 denotes an auxiliary discharge pipe line for supplying the pressure fluid discharged from the receiving groove 31 to the supply ring.
The pressure fluid is discharged smoothly by acting so as to escape from the gap between the fitting groove 12 and the fitting groove 12. Since the auxiliary table 6 configured as described above can be detachably attached to the main table 5 with the bolts 10, it can be easily attached to the existing main table 5 and maintenance work can be performed easily. it can.

Next, the operation will be described.

From the fluid pressure source (not shown), one supply port of the supply ring 14
When the pressure fluid is supplied to 15, the pressure fluid passes through the passage 27 and enters the annular groove 23 and the supply groove 21, and the annular packing 25 is projected onto the ridge 31.
Prevent pressure fluid from leaking by crimping to a and 32b, then enter the receiving groove 31 from the communication hole 25a of the packing 25, operate the check valve 40 through the passage 35, and then pass through the passage 41. To the connection port 43 to operate a clamp device (not shown) to clamp the workpiece. On the other hand, at the same time, a pressure fluid to be discharged from a clamp device (not shown) or the like is sent into the connection port 44, and the passage 42, the check valve 40, the passage 36,
It is discharged from the supply port 16 through the receiving groove 32, the supply groove 22, the annular groove 24, and the passage 28. From the supply groove 22, the supply ring 14
It is also discharged to the outside through the gap between the fitting groove 12 and the fitting groove 12, and smooth discharge is performed. Although the supply of the pressure fluid is stopped after the operation of the clamp device (not shown), the check valve prevents the backflow of the pressure fluid supplied from the connection port 43, so the clamp fluid is clamped even after the supply of the pressure fluid is stopped. State is retained. Further, when the supply of the pressure fluid is stopped, the packing 25 is elastically restored and separated from the protrusions 31a and 31b to be in the non-contact state. After that, the rotary table 4 is rotated to process the workpiece. When the rotation of the rotary table 4 is stopped after the processing is completed, the pressure fluid is supplied from the supply port 16 this time, and a reverse operation to the above is performed to release the clamped state.

In the above embodiment, the supply / discharge circuit is composed of only one circuit, but it is also possible to provide a supply groove on the lower surface of the supply ring 14 to form two circuits.

Next, FIG. 3 shows a different embodiment, and the same components as those of the above embodiment are designated by the same reference numerals as those of the corresponding portions and the alphabet A is added to omit duplicated explanation. The rotary table 4A shown in FIG. 3 is constructed by integrally fixing the supply main body 7A to the main table 5A with unillustrated bolts or the like.
Directly on the ridges 31aA, 31bA and 32aA, 32bA, the receiving grooves 31A, 32
A, passages 35A, 36A, 41A, 42A and connection ports 43A, 44A are provided. If configured in this way, the rotary table device
The installation height of 1A can be further reduced.

As described above, in the rotary table device of the present invention, the rotary table is provided with the annular fitting groove on the outer peripheral surface thereof, the inner surface thereof is provided with the annular receiving groove, and the fitting groove is provided with the supply port. Pressure fluid supply that operates the clamp device etc. by fitting the supply ring relatively rotatably so that the annular supply groove provided in the supply ring faces the receiving groove, and fitting the packing with the communication hole in the supply groove. Since the discharge connection port and the receiving groove are communicated with each other through the check valve built in the rotary table, the check valve can prevent the backflow of the pressure fluid even after the supply of the pressure fluid is stopped. As a result, the rotary table can be rotated while the clamp device or the like is operated, which is convenient. In addition, the vertical dimension required to supply and discharge the pressure fluid can be made smaller, the overall size of the device can be made smaller, and the installation height can be made lower than that of the conventional one when installing on a machine tool. The processing range can be widened and the processing efficiency can be improved.

[Brief description of drawings]

FIG. 1 is a sectional view taken along the line II of FIG. 2 showing an embodiment of the present invention, FIG. 2 is a plan view of FIG. 1, FIG. 3 is a sectional view showing a different embodiment, and FIG. It is sectional drawing of the rotary table apparatus of FIG. 1,1A …… Rotary table device, 2,2A …… Fixed base, 4,4A
...... Rotary table, 12,12A …… Mating groove, 14,14A …… Supply ring, 15,16 …… Supply port, 21,22,21A, 22A …… Supply groove,
25,26,25A, 26A …… Packing, 25a, 26a, 25aA, 26aA …… Communication hole, 31,32,31A, 32A …… Receiving groove, 40,40A …… Check valve, 4
3,44,43A, 44A …… Connecting port

Claims (1)

[Scope of utility model registration request] 1. A rotary table device in which a rotary table is rotatably supported by a fixed base, and a rotary fluid table is provided with a connection port for supplying and discharging pressure fluid for operating a clamp device and the like attached thereto. An annular fitting groove is provided on the outer peripheral surface of the rotary table, and a supply ring having a supply port capable of communicating with a fluid pressure source is relatively rotatably fitted in the fitting groove, and the fitting surface of the supply ring has an annular shape. And a supply groove having a T-shaped cross section communicating with the supply port, an annular receiving groove facing the supply groove is provided on the inner surface of the fitting groove, and the receiving groove and the connecting port are built in the rotary table. And a ring-shaped packing having a communication hole in the supply groove, the ring packing being fitted to both edges of the receiving groove by fluid pressure so as to be capable of being crimped. .