JPS593786Y2 - Machine tool indexing table - Google Patents

Description

[Detailed description of the invention] This invention is an indexing table for a machine tool, which is equipped with a spindle for supporting a workpiece, a chuck, and a rotary table, and can be used to process all kinds of workpieces, and can process multiple workpieces at the same time. This invention relates to a universal indexing table that can be held in a fixed manner and simultaneously perform indexing work.

Conventionally, the indexing table of a machine tool is equipped with one of a spindle, a chuck, or a rotary table as a means of supporting the workpiece, and when the method of gripping the workpiece changes, the indexing table must be replaced. Therefore, there is an inconvenience that at least three types of indexing tables must be prepared in advance.

In addition, the conventional indexing table can only support a workpiece on one side of the indexing table, which limits its throughput.

The present invention eliminates the above-mentioned drawbacks of the conventional indexing table, and provides an indexing table capable of supporting a workpiece on both sides, supporting two workpieces using different support methods, and performing indexing operations at the same time. It is an object.

The details of the present invention will be explained based on the embodiments shown in the drawings.

In FIGS. 1 and 2, a spindle 2 is rotatably supported on an indexing table casing 1 by bearings 3 and 4. As shown in FIGS.

The spindle 2 passes through the casing 1, and a tapered hole 5 for attaching a center bar (not shown) is formed at one end.
A circular table 6 is integrally formed at the other end.

In order to widen the range of uses, the rotary table 6 can also be designed so that it can be removably attached to the spindle 2.

A plurality of radially formed T-grooves 7 into which clamping bolts for fixing a workpiece can be inserted are formed in the rotary table 6.

A chuck 8 is fixed to the end of the spindle 2 where the tapered hole 5 is formed.

Since the chuck 8 has a well-known structure, detailed explanation will be omitted.

It is convenient if the chuck 8 is of a removable structure, and either the circular table 6 or the chuck 8 can be attached to both ends of the spindle as appropriate.

If necessary, tapered holes for attaching a center bar may be formed at both ends of the spindle 2.

The spindle 2 has a clutch 9, for example, one side of a pawl clutch 9.
a is fixed so that it cannot be moved relative to the other.

In the illustrated example, it is fixed by a pin 10 and a retaining ring 11.

The other side 9b of the clutch 9 is mounted on the spindle 2 so as to be rotatable and movable in the axial direction.

The other side 9b of the clutch is formed with a rotational drive gear 12 and an annular groove 14 in which a clutch hawk 13 is engaged.

Clutch hawk 13 is fixed to shaft 15.

A stopper pin 16 is formed at one end of the shaft 15, and a piston 17 is formed at the other end.

The piston 17 is slidably mounted on a clutch cylinder 18 mounted in the casing 1.

A cylinder lid 19 is fixed to the cylinder 18 in a tangerine shape, and an end 19a of the iron lid 19 serves as a stopper indicating the end of movement of the piston 17.

The stopper 16 is slidably supported by a bushing 20 attached to the casing 1.

The stopper pin 16 is inserted into an index hole 21 arranged on the same circumference at a predetermined interval in an index plate 2a formed at one end of the spindle 2 to position the index plate 2a.

The indexing position of the spindle 2 is determined by the indexing plate 2a,
Performs indexing of a rotary table or chuck, etc.

When pressure oil is supplied from the connection port 22 formed in the cylinder 18, the piston 17 is moved to the right in the figure.
The clutch hawk 13 fixed to the shaft 15 is also moved to the right, so that the other clutch 9b engages the one 9a and transmits the rotation of the gear 12 to the spindle 2.

At this time, the stopper pin 16 at one end of the shaft 15 is inserted into the index hole 2.
1, the indexing plate 2a, ie, the spindle 2, can be rotated.

The pressure oil supply to the cylinder 18 is switched and the piston 17
In the figure, when pressure oil is supplied from the connection port (not shown) on the right side and drained from the connection port 22, the piston 17
moves to the left.

When the stopper pin 16 just opposes the index hole 21, it engages in the index hole 21, and then the clutch 9 is disengaged.

Gear 12 meshes with rack 23 in FIG.

The shaft 24 forming the rack 23 is slidably supported by an indexing cylinder 25 fixed to the casing 1.

A hole 27 is formed in one end of the shaft 24 in which one end of a piston 26 is slidably supported.

A spring 28 is mounted in the hole 27 and is tensioned between a seat plate 29 provided on the shaft 24 and the end of the piston 26.

The piston 26 is slidably supported by an index cylinder 30 attached to the casing 1, and the other end of the piston 26 is slidably supported in a sealed manner by a lid 31 that seals the index cylinder 30.

The indexing cylinder 25 is sealed by a sealing lid 32, and a bushing 33 is screwed onto the iron lid 32 in a sealing manner.

A hollow hole 34 is formed in the bush 33, and the hollow hole 34
An operating pin 35 is slidably guided by flanges 36 and 37 with a limited range of movement.

The collar 36 can also be used as a retaining ring.

A spring 38 is installed between the bushes 33 and 37 and acts to constantly press the operating pin 35 downward in the figure.

By adjusting the screwing amount of the collar 36, the operating pin 3
The operating position of 5 is adjusted.

When the shaft 24 moves upward in the figure and reaches a predetermined position, the actuating pin 35 is pushed upward in the figure toward the first limit switch 40, and when the shaft 24 moves downward in the figure, the spring 3
8, the actuating pin 35 is pushed downward until the collar 36 comes into contact with it.

When the actuating pin 35 comes to a predetermined position, the first limit switch 40 is pressed and activated.

An index adjustment device 39 is attached to the casing 1 at a position facing the lid 31 of the index cylinder 30.

The index adjustment device is shown in FIGS. 2 and 3 in the casing 1
A shaft 41 is mounted rotatably and slidably in the axial direction.

An index setting plate 42 is formed at one end of the shaft 41, and a plurality of bolts 43 are screwed onto the same circumference.

The center of rotation of the shaft 41 is arranged eccentrically with respect to the central axis of the piston 26, and by rotating the shaft 41, the plurality of bolts 43 arranged on the same circumference come to a position that coincides with the center line of the piston 26. It is.

The axial movement range of the shaft 41 is limited by an index setting plate 42 and a retaining ring 44, and normally the shaft 41 is moved to the position shown in the figure by a spring 46 that applies a pressing action between the lid 45 fixed to the casing 1 and the shaft 41. The index setting plate 42 operates the second limit switch 47.

The rotation of the shaft 41 is achieved by the cooperation of recesses 48 arranged at predetermined intervals on the circumference of the shaft 41 and a ball 56 which is freely movable within the hole 49 in the lid 45 and is pressed against the shaft 41 by a spring 50. The rotation stop position is reliably held.

As shown in Fig. 4, the indexing stand A thus constructed is removably attached between the two stocks B and C arranged on the table T of the machine tool.
A workpiece E is attached to the stock C and the chuck 8.

Next, the operation of the indexing table will be explained.

As mentioned above, the machine tool with the workpiece placed on indexing table A and E set is started, and the first limit switch 40 is pressed by the actuating pin 34 in response to the indexing start or machining end signal, that is, the shaft 24 and On the condition that the rack 23 is waiting at a predetermined position, a switching valve such as a solenoid valve is activated and pressure oil is transferred to the clutch cylinder 18.
The shaft 15 is moved, the stopper pin 16 is disengaged from the index hole 21, and the clutch piece 9b moves via the clutch hawk 13 so as to engage with the clutch piece 9a.

At the position where the clutch pieces 9a and 9b are engaged, the clutch hawk 13 operates the third limit switch 53 and switches the control valve to supply pressure oil from the connection port 51 of the indexing cylinder 25, while connecting the indexing cylinder 30. It is discharged from the port 52.

The shaft 24 and the rack 23 move, and the gear 12 meshing with the rack 23 rotates.

One end of the piston 26 comes into contact with the bolt 43, and the index setting plate 42 is moved until it comes into contact with the casing 1, thereby moving by a predetermined index amount.

That is, the spindle 2 is rotated by the index pitch via the gear 12.

When one end of the piston 26 pushes the bolt 43, the second
The limit switch 47 is operated, the control valve of the clutch cylinder 18 is switched, the shaft 15 is moved, the stopper pin 16 is fitted into the index hole 21, and the spindle 2 is held at a predetermined index position, and at the same time the clutch 9 is disengaged. Ru.

At the end of the clutch release movement of this shaft 15, the clutch hawk 1
3 operates the fourth limit switch 54, thereby switching the control valve for the indexing cylinder 25.30,
Pressure oil is supplied from the connection port 52 and discharged from the connection port 51, and the first limit switch 40 moves the shaft 24 to the operating pin 35.
It returns to the standby position and moves until it is pressed.

At this time, since the clutch 9 is disengaged, the gear 12
rotates freely.

The indexing operation is completed by actuation of the first solenoid 40, and the machining operation using the machine tool is performed.

The indexing operation from the beginning is repeated by a signal indicating the end of the machining operation by the machine.

The indexing amount can be easily changed by adjusting the length of the bolt 43 by hand by turning the knob 55 formed on the shaft 41 of the indexing adjustment device 39, and then changing the bolt 43 to a bolt corresponding to the indexing amount to be worked. Adjustable.

The indexing amount can be finely adjusted by adjusting the length of the bolt 43 and the screwing amount of the bushing 33 screwed onto the lid 32 of the indexing cylinder 25, and the stopper pin 16 of the indexing hole 21 of the indexing plate 2a It is possible to make fine adjustments to the position.

As described above, the indexing work is performed.

In this case, the workpieces E attached to both ends of the spindle 2 are simultaneously indexed and machined using two tools.

Further, in this embodiment, a circular table 6 is provided at both ends of the spindle 2.
In this case, not only is it more advantageous to index two different workpieces, but even when indexing a single workpiece, it is possible to select the optimal gripping means for the workpiece. be.

However, if two of the same workpieces are to be indexed at the same time, it is convenient to attach a rotary table or chuck to both ends of the spindle.

The indexing table according to the present invention is capable of indexing two workpieces with one indexing table.

Moreover, in this invention, the indexing plate is fixed or integrally formed with the spindle, making the indexing table compact.

[Brief explanation of drawings]

Fig. 1 is a front sectional view of the indexing table according to the present invention, Fig. 2 is a sectional view taken along line II-II in Fig. 1, and Fig. 3 is a sectional view taken along line III-II in Fig. 2.
FIG. 4 is a schematic view showing an example of the use of the indexing table according to the present invention. 1...Casing, 2...Spindle, 2a...Index plate, 6...Round table, 8...Chuck, index Means (16...
・Pin, 39... Index setting device), drive device (
12...Gear, 23...Rack, 24
...Shaft, 21... Index hole,)A...
... Indexing table, B, C ... Stock, T ...
···table.

Claims (1)

[Scope of utility model registration request] A spindle that is rotatably supported by the casing, penetrates through the casing, and can be fitted with gripping means such as a rotary table or chuck at both ends; an indexing plate that is fixed to or integrally formed with the spindle and has an indexing hole; and an indexing hole. An indexing means having a pin that can be fitted into the casing and a drive device for rotationally driving the spindle are provided in the casing, and the table is inserted between two stocks provided on the table of the machine tool. An indexing stand for a machine tool, characterized in that it is removably attached to.