JPS6146244B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a machine tool of a type in which a plurality of different gearing heads are prepared and one of them is freely selected and used.

Conventionally, as a machine tool of this kind, there is a type in which a plurality of gearing heads are prepared on a stockyard consisting of annular rails, and one of them is selectively used. On the other hand, the means for attaching and detaching the head are relatively cumbersome, and thus the replacement of the gearing head is disadvantageous in that it is relatively time-consuming and labor-intensive.

The object of the present invention is to obtain a machine tool free of such inconveniences, and includes a machining unit placed on a base so as to be movable back and forth via a slide table, and a movable machine provided on the machining unit. A movable rail that is always drawn backward by the device, a fixed rail provided on a base that forms an annular rail by coming into contact with the movable rail, and a fixed rail that is removably arranged at equal angular intervals on the annular rail. The processing unit includes a plurality of gearing heads provided on the movable rail, and an index table provided on a base for selectively moving one of the gearing heads onto the movable rail. The present invention is characterized in that a clamping device for clamping one of the gearing heads and releasing the clamp is provided so as to operate in conjunction with the longitudinal movement of the processing unit.

An example of implementing the present invention will be explained with reference to the attached drawings.

In the drawings, reference numeral 1 indicates a base, and on the base 1 there is a slide table that can freely move back and forth and is screwed into a forward and backward feed screw 4 that is interlocked with a rear pulse motor and other feed motors 2 via a reducer 3. 5, and a processing unit 8 having a drive motor 6 and a drive shaft 7 on the front surface of the drive motor 6 interlocked with the drive motor 6 is fixedly installed on the table 5, and thus the unit 8 can rotate the motor 2 in forward and reverse directions. According to the table 5, the forward and backward feeds associated with the table 5 are provided. It is assumed that the unit 8 is always located at the rear end position on the base 1 as shown in FIGS. 1 and 2. In the drawing, 9 indicates a jig stand in front of the base 1,
A workpiece a to be processed is detachably attached to this and prepared.

On the base 1, an annular rail 12 consisting of a fixed rail 10 at the rear and a movable rail 11 at the front is arranged in two stages, upper and lower, surrounding the processing unit 8 at the backward end position. A plurality of gearing heads 13, for example four, are disposed at equal angular intervals and supported by this, and an index table 14 is provided above the indexing table 14, and as the table 14 rotates, a plurality of gearing heads 13 are arranged. is rotated on the rails 12, 12 accordingly, so that any one is selected on the movable rails 11, 11. To explain this in detail, each of the fixed rails 10 described above is prepared by being connected to the outer periphery of a support frame 15 fixed to the rear part of the base 1 via each support arm 16, and Each movable rail 11 is prepared by connecting the front surface of the processing unit 8 with a movable device 17 consisting of each air cylinder, and this device 17 acts to pull in the movable rail 11. A gearing head selected on this movable rail 11 is crimped onto the processing unit 8 and fixed in cooperation with the action of a clamp arm 29, which will be described later. It has a book, a central common operating shaft 19 connected to these, and a pair of left and right guide rollers 20, 20 on the back side of the book.
are provided in a pair of upper and lower rollers, and the rollers 20,
20 and a pair of running rollers 20', each of the pair of rollers 20, 20 and the running roller 20' straddles each rail 12 and is detachably engaged with and supported.

Therefore, the roller 20 can be attached and detached by simply raising the lower end thereof to the upper surface of the rail. Furthermore, the index table 14 described above is rotatably supported on the upper surface of the support frame 15, and the table 14
The index arm 21 has four index arms 21 corresponding to the four gearing heads 13, and each arm 21 and each head 13 are attached to a bracket 13' on the upper surface of the head.
The connecting pin 22 provided through the arm engages with the connecting pin groove 23 formed on the lower surface of each arm to connect the arms, and the upper surface thereof is formed into a Geneva gear 24, and the reducer 26 is connected to the motor 25 on the upper side. It consists of an indexing device in which a Geneva pin 27 interlocked with the Geneva gear 24 is engaged with the meshing groove 24' of the Geneva gear 24, so that when the motor 25 operates, the table 14
This gave it an intermittent rotation of 90 degrees. In other words, gigantic head 13-4
The pieces were given intermittent rotation of 90 pieces so that one piece was sequentially selected on the movable rails 11, 11. Furthermore, in order to secure the selected gearing head on the rail, an index table lock pin 26', which works with the indexing device, was fitted into the groove 24' on the top surface of each arm. The one is automatically connected to the processing unit 8 when it moves forward from the backward end position, that is, the left and right parts, which are applied to the unit 8 by a spring 28 to open each other, are automatically attached to the processing unit 8. A pair of clamp arms 29, 29 are provided on the upper and lower sides, and a pair of clamp arms 2 are provided on the rear side.
and a pair of fixed cams 30, 30 each engaging the respective tail ends of the arms 29, 29 to press the arms 29, 29 toward the closing side against the spring 28, when the arms 9, 29 move backward; Further, each gearing head 13 is provided with a pair of clamp claws 31, 31, respectively, which are engaged with a pair of clamp arms 29, 29, so that the machining unit 8
is at the initial reverse end position, each arm 2
9 and 29 are in the inoperative position where they are mutually closed, but as the unit 8 moves forward, the arms 29 and 29 are released from the pressure by the cams 30 and 30 and are in the operational position where they are mutually opened. The clamp claws 31, 31 are engaged with each other.

As the unit 8 moves forward, the movable devices 17, 17 consisting of a pair of left and right air cylinders provided above the unit 8 are connected via a piston rod 17' extending from the cylinders and a support arm 16'. The divided surface 11' of the movable rail 11 is pressed against the divided surface 10' of the fixed rail 10, acting to draw it in, and restricting the arbitrary forward movement of the gearing head 13 as the unit 8 moves forward. It is crimped onto the gearing head and cooperates with the action of the clamp arm. The lower movable rail 11 of the unit 8 is retracted by a spring (not shown) and cooperates with the action of the air cylinder.

In other words, as the machining unit 8 moves forward, the ganging head 13 is automatically connected to the drive shaft 7 on the processing unit 8 side and the operating shaft 19 on the ganging head 13 side.
and are spline engaged with each other. In order to ensure this connection, a positioning pin 32 is provided on the opposing surface of the unit 8 and the head 13.
and pin holes 33 in plural sets.

To explain its operation, initially the processing unit 8
is at the backward end position as shown in FIGS. 1 and 2, and in this position, each movable rail 11 comes into contact with each fixed rail 10 due to the pressing action of the movable devices 17, 17 and a spring (not shown), and both rails 11 and 10 form each annular rail 12, and if the index table 14 is operated in this state, it will rotate with, for example, four of the ganging heads 13, and any one will be attached to the movable rail 11. .
0, each pair of clamp arms 29, 29 open mutually and engage with each pair of clamp claws 31, 31, so that the unit 8 can be attached to the one gearing head 13. are tied together, and upon subsequent advancement of the unit 8 the head 1
3 moves forward together with the movable rails 11, 11, and the workpiece a in front of it is processed thereby. Next, to replace the head 13,
The unit 8 is returned to the previous reverse end position. That is, according to this, each pair of clamp arms 31, 31 is in the inoperative position, the unit 8 is disconnected from the head 13, and each movable rail 11 is in contact with each fixed rail 10, and each annular rail 12, the index table 14 can be operated in this state to select a separate gearing head 13.

In this way, according to the present invention, a processing unit is placed on a base via a slide table so as to be movable back and forth, and a movable rail is always drawn rearward by a movable device provided on the processing unit. , a fixed rail provided on a base that forms an annular rail by coming into contact with the movable rail; a plurality of ganging heads removably disposed at equal angular intervals on the annular rail; 1
and an index table provided on a base for selectively moving the pieces onto the movable rail, so that a plurality of gearing heads can be stably supported on the base, and the gearing heads can be attached to the processing unit. Since the machine can escape to the side or rear of the machine and wait, it is possible to freely replace the gearing head in the atmosphere during machining.Furthermore, the gearing head indexing device is located at the center of the gearing head group and at the center of the machine tool. It is easy to support, and since there are no overhanging parts, it can be stably packed into a small space, and it also allows the processing unit to clamp and unclamp one of the selected gearing heads on its movable rail. Since the clamping device is provided to operate in conjunction with the longitudinal movement of the processing unit, the gearing head is tied to the processing unit as the processing unit moves forward, and is untied as it retreats. This has the effect of making it easier to attach and detach.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway side view of an example of the machine tool of the present invention, Fig. 2 is a top view thereof, and Fig. 3 is a partially cutaway view of one gearing head selected and in operation. The cut-away side view, FIGS. 4 and 5 are cut-away plan views of the clamp arm portion in an operative state and in an inoperative state. DESCRIPTION OF SYMBOLS 1...Base, 2...Feed motor, 5...Slide table, 6...Drive motor, 8...Processing unit, 10
... fixed rail, 11... movable rail, 12... annular rail, 13... gearing head, 14... index table.

Claims (1)

[Claims] 1. A processing unit placed on a base so as to be able to move back and forth via a slide table, and a movable rail that is always pulled rearward by a movable device provided on the processing unit, and abutting against the movable rail. a fixed rail provided on a base forming an annular rail; a plurality of ganging heads removably disposed at equal angular intervals on the annular rail; and one of the ganging heads mounted on the movable rail. An index table provided on a base for selective movement, and a clamping device for clamping one of the selected gearing heads on the movable rail and releasing the clamp is attached to the processing unit in the front-rear direction of the processing unit. A machine tool with an exchangeable gearing head, characterized in that the gearing head is operated in conjunction with the movement of the gearing head.