JPH0623446A - Mold changing device for press machine - Google Patents

Abstract

(57) [Summary] [Purpose] To enable automatic die replacement. [Structure] Bolster plate 18 on press bed 16
To fix. On the upper surface side of the bolster plate 18, a die lift device 19 with rollers at the upper end is installed. A mold 21 placed and supported on the bolster plate 18 is lifted from the bolster plate 18 by a mold lift device 19. Rollers 26 are provided on the upper surface of the mold carrier body 22 that can be self-propelled
, And a mold carrier 8 provided with a mold gripper 28 movably in the front-rear direction is moved to a position near the bolster plate 18. When the mold gripping tool 28 is moved forward to engage the mold 21 and then the mold gripping tool 28 is retracted,
The mold 21 is transferred onto the mold carrier 8. The mold 21 can be carried by moving the mold carrier 8.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a die exchanging device used when exchanging a die of a press machine,
The present invention relates to a mold exchanging device capable of automatically conveying and exchanging a mold between a press position and a warehouse.

[0002]

2. Description of the Related Art In a press machine, a mold having a weight of nearly 40 tons is used, and usually 4 to 5 sets are required for one molded product (for example, panel).

Each mold is installed on the press bed via a die plate and a bolster plate, and when these molds are replaced, the molds shown in FIGS.
The method is as shown in (d).

That is, when a dolly a called a moving bolster or a bolster carrier is prepared on both sides of the press machine and the mold to be replaced is pulled out of the machine and carried into a warehouse, first, The mold b to be replaced,
As shown in FIG. 4 (a), the die plate c and the bolster plate d together with the dolly a are pulled out to the outside of one machine, and then the clamps of the die plate c and the bolster plate d are released. The mold b is raised by the lift cylinder e on the side of the carriage a through the die plate c, so that a space is formed between the bolster plate d and the die plate c. Next, the small truck f is inserted into the bolster plate d, the lift cylinder e is lowered, and the mold b is placed on the small truck f. In this state, the mold b is moved to the position of the crane by the small truck f, and thereafter, the mold b and the die plate c are hung by the crane and transported to the warehouse to be loaded into the warehouse.

Further, when a new die b is carried out from the warehouse and incorporated in the press machine, the die b in the warehouse is hung together with the die plate c by a crane and the drawer side of the press machine is reversed, contrary to the above. Is conveyed to the opposite side, and then the mold b is placed on the small carriage f prepared for incorporation into the die plate c.
And then remove the mold b from the crane, and then
The mold b is conveyed by the small carriage f onto the carriage a, and then the mold b is lifted by the extension operation of the lift cylinder e to remove the small carriage f, and the mold b is shortened by the shortening operation of the lift cylinder e. It is transferred onto the bolster plate d through the die plate c and is carried into the machine by the carriage a.

[0006]

However, in the above-mentioned conventional mold exchanging method, since the carriage a moves only a short distance to the front and rear surfaces or the left and right surfaces of the press machine, power is supplied to the carriage. Can be done with a power cable that is fixedly connected to the trolley, but since the mold is hung by a crane and conveyed, it is a crane work in which a worker intervenes when carrying the mold into the warehouse, and moreover, it is close to 40t. The work of mounting the mold in the correct position with a crane requires 2-3 workers, and there is a problem that the workability is poor due to the heavy weight. Further, the trolley a has a bolster plate. Since d is also placed together with the mold b, it is necessary to have strength for supporting a large weight.

In view of the above, the present invention enables the work of removing the mold from the dolly, the work of mounting the mold on the dolly, and the work of carrying the mold between the press machine and the warehouse to be automatically performed without using a crane. At the same time, the trolley is intended to provide a mold exchanging device that does not require the strength to be increased as in the conventional case.

[0008]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention provides a mold lifting device having a roller at the upper end on the upper surface side of a bolster plate fixed on a press bed and a mold mounted on the upper surface. A positioning mechanism is installed, and rollers are installed on the upper surface of the mold carrier body that allows self-propelled movement in the front-rear direction and the left-right direction, and the mold gripper that is hooked on the mold can be freely moved forward and backward. It is provided with a die transfer carriage having an upper surface height substantially equal to the upper surface height of the bolster plate, and only the die can be transferred between the upper surface of the bolster plate and the upper surface of the die transfer carriage. It is also possible to adopt a configuration capable of further performing the above, and further to provide a configuration including a die transporting carriage traveling device for moving the die transporting carriage for a long distance.

[0009]

[Function] When the mold is to be taken out of the machine, the mold carrier is put in the machine and stopped near the bolster plate, and the mold gripping tool on the mold carrier is moved forward and hooked on the mold. After
When the mold gripping tool is retracted, the mold moves from the bolster plate onto the mold carrier.

Next, when the die carrier truck is run, the die can be pulled out of the machine and conveyed to an arbitrary place. Further, when the mold carrier is moved by the mold carrier traveling device, the mold can be moved for a long distance, and the mold carrier can be carried in by moving the mold carrier. This makes it possible to eliminate the need for a crane.

[0011]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows an outline of a press plant showing one embodiment of the present invention. 1 is a press body, 2 is a destack feeder on the upstream side of the press line, and 3 is an auto pallet on the downstream side. Tizers, 4 and 5 are electromagnetic control panels, 6 is a stack carrier, 7 is a pallet carrier, 8 is a mold carrier, and 9 is a mold carrier 8 which is placed on a rail 10 for moving the mold carrier a long distance. A die carrier carriage traveling device, 11 is a protective cover for covering the traveling path of the die carrier carriage traveling device 1,
The reference numeral 2 designates a mold carrier mother carriage which is equipped with a mold moving device (not shown) on the upper surface so that the mold can be transferred to and from the upper surface of the mold carrier carriage 8 and is made self-propelled. ,
Reference numeral 13 is an operation room, 14 is a power feeding device (auto coupler) which can be attached to and detached from the mold carrier 8, and 15 is a trolley cable.

As shown in FIG. 2, the press body 1 has
A bolster plate 18 is fixedly installed on a press bed 16 via a frame 17 having a required height, and the bolster plate 18 has a die lift device 1 with a roller at its upper end.
9 are arranged side by side in the lateral direction (the front-back direction of the press line),
In addition, a positioning pin 20 is provided as a mold positioning mechanism so as to be able to move in and out of the upper surface, and the mold 21 is placed on the upper surface. Although not shown, the bolster plate 18 includes an air circuit, a cooling water circuit, which is necessary for molding, in addition to a hydraulic automatic clamp unit for preventing the mold 21 from floating during molding. A processing oil application circuit, an electric circuit, and an automatic connection device are provided. Further, the hydraulic pressure source of the die lift device 19 with rollers is installed at any of the frame 17, the press bed 16 and a position near the press body 1.

As shown in FIGS. 2 and 3, the die carrier truck 8 has wheels 2 so that it can travel in the front-rear direction and the left-right direction.
3 and 24 are provided so that the motor 25 can rotate the wheels 23 or 24 via a power transmission mechanism (not shown) so that the motor 25 can be self-propelled in the front-rear direction (the direction in which the press main body 1 is moved toward or away from) or the left-right direction. A certain die carrier cart main body 22
A roller 26 for facilitating transfer of the mold 21 is installed on the upper surface of the mold, and a hook 27 attached to the side of the mold 21.
A mold gripping tool 2 which is adapted to be gripped on a mold 21
8 is installed on the upper surface of the carriage main body 22 so as to be movable in the front-rear direction of the carriage main body 22, and is, for example, arranged in the front-rear direction and is driven to rotate.
And a swing device 30 for swinging the mold gripping tool 28 at the forward end position while allowing the mold gripping tool 28 to move forward and backward by the rotation of the screw rod 29.
Further, a positioning pin 31 as a mold positioning mechanism is provided on the upper surface of the carriage main body 22 so as to be able to move up and down. Further, on the lower surface of the carriage main body 22, a movable mold transport carriage fixing tool 32 is provided. And a detachable portion 35 of the power feeding device 34 connected to the power feeding cable 33 is provided at the rear end portion of the carriage main body 22, and a pump unit 36 is provided inside the carriage main body 22.
Is provided. Reference numeral 37 denotes a proximity sensor installed on the front surface of the carriage main body 22.

The mold carrier carriage traveling device 9 is a device for supplying power to the mold carrier carriage 8 to enable the mold carrier carriage 8 to travel a long distance, and as shown in FIG. 3, it is parallel to the press line. It is movably mounted on the rail 10 laid on the ground via wheels 38, and receives electric power from a trolley cable installed on the ground or underground (the case of the ground is shown in the drawing). , A detachable power feeding device 39 for supplying electric power to the mold carrier 8 and a coupling device (for example, an engagement pin) for connecting the mold carrier 8 so that the mold carrier 8 can travel together. Etc.) 40 and a traveling drive device, and the like, so as to travel within the protective cover 11.

Now, when the die 21 of the press body 1 is to be replaced with another die, as shown in FIG.
The power feeding device 34 is attached to the die, and the die carrier vehicle 8 is moved forward to be loaded into the machine. Since the proximity sensor 37 is provided on the front surface of the mold carrier vehicle 8, when the fixed bolster plate 18 is approached, the proximity sensor 37 detects the approach and the mold carrier vehicle 8 is stopped. When the die transport carriage 8 is stopped at a predetermined position, it is fixed to the floor by the die transport carriage fixture 32. Next, after the mold gripping tool 28 is advanced to the foremost end, it is swung by the swing device 30 to move the mold 21.
So that it can be hooked on the hook 27.

When the mold gripping tool 28 is hooked on the hook 27 of the mold 21, the mold lifting device 19 on the bolster plate 18 is operated to lift the mold 21 with a roller.
The mold gripping tool 28 is retracted to the rear end of the mold transport carriage 8 so as to be supported on the mold carrier 9. This allows the mold 21
Can be easily transferred from the top of the bolster plate 18 to the top of the die carrier truck 8 by the roller at the upper end of the die lift device 19.
At this time, since the roller 26 is also installed on the upper surface of the mold carrier 8, the mold 21 moved onto the mold carrier 8 can also be easily and slightly transferred onto the mold carrier 8. You can

When the mold 21 has finished transferring onto the mold carrier 8, the mold carrier 8 is self-propelled and carried out of the machine, and as shown in FIG. Device 9
Traveling to the mold carrier carriage 9 and the coupling device 4
The power supply device 34 on the floor is detached from the mold carrier 8 and the power supply device 39 of the mold carrier traveling device 9 is mounted on the mold carrier 8 as shown in FIG. It can be so.

Next, the mold carrier truck 8 is moved together with the mold carrier carriage traveling device 9 in the direction in which the mold carrier mother carriage 12 is on standby. At this time, the mold carrier 8 is moved by receiving power from the mold carrier traveling device 9 via the power feeding device 39, and therefore the mold carrier 8 is a cable for obtaining power required for its own traveling. It is not necessary to pull a cable for long-distance travel in the travel area of the mold carrier 8 and to provide a groove for the cable on the floor surface or to extend the power line around the mold carrier vehicle 8 by releasing the power supply device such as .

When the front end surface of the die carrier truck 8 reaches the position where it coincides with the die carrier mother truck 12, the traveling of the die carrier truck traveling device 9 is stopped, and then the die on the die carrier truck 8 is stopped. The gripper 28 is moved forward to move the mold 21 to the mold carrier mother carriage 12
Try to move it up. When the mold 21 is transferred onto the mold carrier mother carriage 12, the mold carrier mother carriage 12 is moved to the warehouse so that only the mold 21 is carried into the warehouse.

On the other hand, when the mold 21 in the warehouse is unloaded from the warehouse and installed on the bolster plate 18 of the press body 1, when the mold in the warehouse is unloaded and mounted on the die carrier mother carriage 12. , The mold 21 is conveyed to the position of the waiting mold carrier 8, and then the mold 21 is moved from the mold carrier mother carrier 12 onto the mold carrier 8 and thereafter, the reverse operation is performed. After the mold carrier carriage 8 is carried by the mold carrier carriage device 9 according to the procedure, the power feeding device is switched so that the mold carrier carriage 8 can travel by itself, and the mold body 21 is placed in the press main body 1 with the mold feeder 21 mounted thereon. To the mold 2 from the mold carrier 8
1 is transferred onto the bolster plate 18, the lift device 19 on the bolster plate 18 is lowered to place the mold 21 on the bolster plate 18, and the positioning pin 20 is used to position the mold carrier 8 outside the machine. Take it out and finish the replacement work.

In the above-mentioned work of exchanging the mold 21,
Since only the mold 21 is placed on the mold transport carriage 8, the carriage 8 itself may be strong enough to receive only the mold 21.

The embodiment of the present invention has been described in detail above.
The present invention is not limited to the above-described embodiment, and for example, a case has been shown in which the mold carrier mother carriage 12 is used to carry the mold carrier between the warehouse and the mold carrier carriage 8.
Mold carrier mother car 1 so that it can be carried out by the mold carrier 8
2 may be omitted, and the case where the power feeding device 34 is attachable to and detachable from the mold carrier 8 is shown, but the battery may be mounted on the mold carrier 8.
The case where the long-distance movement is performed by the die carrier carriage traveling device 9 has been described. 8
It is needless to say that the traveling device 9 and the power feeding device from the traveling device 9 can be eliminated if it can be mounted on the vehicle, and various changes can be made without departing from the scope of the invention.

[0024]

As described above, according to the mold exchanging device for a press machine of the present invention, a lift device with rollers is installed at the upper end of the bolster plate fixed on the press bed, and the bolster plate is installed. It has a mold carrier that has rollers installed on the upper surface of a self-propelled mold carrier body that is at the same level as the upper surface of the mold and a mold gripper that is movable in the front-rear direction. , The mold can be freely transferred between the bolster plate and the mold carrier, and the mold carrier carrying only the mold is moved on the floor to carry the mold. Because it is done
Eliminating the work of mounting the mold on the trolley and moving the mold to the warehouse by the conventional crane, the heavy mold replacement work can be performed automatically without the need for the operator's hand. ,
Crane-less and labor-saving can be achieved, and since the mold carrier cart carries only the mold, it can support the weight of the mold. Furthermore, the mold carrier cart can be used to support the mold carrier truck. By conveying the mold carrier for a long distance, the mold carrier can be released from the power supply mechanism such as a cable that obtains the power required for the mold carrier to travel, and thus the mold carrier can be extended to the traveling range. There is no need to pull a cable for traveling a long distance, and it is possible to obtain excellent effects such as keeping the order in the factory.

[Brief description of drawings]

FIG. 1 is a schematic perspective view showing an embodiment of a mold exchanging device of the present invention.

FIG. 2 is a side view showing a state of delivery of a mold between a fixed bolster plate and a mold carrier.

FIG. 3 is a side view showing a state in which the mold transport carriage is run by the mold transport carriage travel device.

FIG. 4 is a view showing an example of a conventional mold changing system,
(A) is a diagram showing a state in which a die is mounted on a carrier together with a bolster and is conveyed, (b) is a diagram showing a state in which the die is raised, and (c) is a diagram showing a state in which a carriage is put on the bolster. , (D) are diagrams showing a state in which a die is moved by a dolly.

[Explanation of symbols]

 8 Mold carrier truck 9 Mold carrier truck traveling device 10 Rail 16 Press bed 18 Bolster plate 19 Mold lift device 20 Mold positioning pin (mold positioning mechanism) 21 Mold 22 Mold carrier carriage body 26 Roller 28 Mold Grasping tool 29 Screw rod 40 Coupling device

Claims (2)

[Claims] 1. A mold lifting device having rollers at the upper end and a mold positioning mechanism for mounting the mold on the upper surface are installed on the upper surface side of the bolster plate fixed on the press bed, and the level is almost the same as the upper surface of the bolster plate. The above-mentioned self-propelled mold carrier is provided with a roller on the upper surface of the mold carrier, and a mold carrier is provided with a mold gripper that is movable in the front-rear direction, and the upper surface of the bolster plate and the mold. A mold exchanging device for a press machine, characterized in that it has a structure capable of transferring only a mold to and from an upper surface of a carrier. 2. The press according to claim 1, further comprising a die transporting vehicle traveling device which has a coupling device with the die transporting vehicle and which is self-propelled on a rail, so that the die transporting vehicle travels a long distance. Machine tool changer.