JPH0890101A - Method and device for die changing of transfer press - Google Patents

Abstract

PURPOSE: To shorten a changing time and to improve the working efficiency of a press and a productivity by changing metallic die and attachment mounted on a transfer bar in parallel in other places. CONSTITUTION: An attachment changing position A and a standby position B are arranged on both sides of a metallic die changing position C. A metallic die 3 after a press working and a transfer bar 7a are moved from a press main body 1 to an attachment changing position A by a moving bolster 2 through a metallic die changing position C. During this operation, press is performed by bringing the moving bolster 2 existing at the standby position B in the press main body 1. The changes of the metallic die 3 and the attachment 7a in the attachment changing position A are performed in parallel by lifting up the transfer bar in the attachment changing position A and by moving the moving bolster 2 to the metallic die changing position C. The transfer bar 7a is loaded on the moving bolster 2 in the attachment changing position A.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a die exchanging method and die exchanging device for a transfer press, which improves productivity by shortening die exchanging time.

[0002]

2. Description of the Related Art Conventional transfer presses have a plurality of processing stations in the press body and are constructed so that workpieces can be sequentially formed at these processing stations. The transfer feeder is used for the transportation. In addition, inside the press body, a moving bolster that can be freely taken in and out of the press body is provided so that the attachments attached to the transfer bar of the mold and transfer feeder can be exchanged externally. The transfer bar to which the mold and the attachment are attached by the moving bolster is carried out from the inside of the press body, and the mold and the attachment are replaced at the mold replacement place.

[0003]

In the conventional transfer press, another moving bolster in which a mold and a transfer bar to be used next are preset while the mold and the attachment are exchanged by the external setup. The operation rate of the transfer press is being raised by bringing it in and starting the work. Therefore, the die replacement place is located away from the press body, and it takes time to move the moving bolster carried out from the press body to the die replacement place. Further, since the mold and the attachment are exchanged at the same place, the attachment cannot be exchanged during the exchange of the die, so that there is a problem that waiting time becomes long and it takes a long time to exchange the die and the attachment.

Particularly in recent years, when high-mix low-volume production has become mainstream, the number of times the molds have to be replaced increases.
If it takes a long time to replace the mold and the attachment, the operation rate of the transfer press is lowered, which causes a problem that productivity is greatly affected. The present invention has been made to solve such a problem, and provides a mold exchanging method and a mold exchanging device for a transfer press that shortens the exchanging time of a mold and an attachment, thereby improving the press operating rate and The purpose is to improve the accompanying productivity.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a moving bolster which is used to move a mold and a transfer bar to which an attachment is attached after completion of press work from the inside of the press through a mold replacement position. While moving to the attachment exchange position, during this time, the moving bolster that waits at the standby position is loaded into the press body to start the press work, and the transfer bar lifter is lifted up by the transfer bar lifter installed at the attachment exchange position. To the mold replacement position, replace the mold at the mold replacement position and the attachment at the attachment replacement position in parallel, and place the transfer bar on the moving bolster at the attachment replacement position after the mold replacement. And wait until the next press work at the standby position. Bing bolster is obtained so as to wait.

Further, in the vicinity of the press main body, a mold exchanging position for exchanging a mold carried out from the inside of the press main body by a moving bolster and an attachment attached to the transfer bar, an attachment exchanging position, and a mold and a transfer bar to be used next time are provided. There are standby positions for the set moving bolsters, and a mold lifter that lifts the mold on the moving bolster to the replacement height at the mold replacement position, and a moving bolster at the attachment replacement position. It has a transfer bar lifter that raises and lowers the existing transfer bar.

[0007]

[Operation] With the above configuration, the mold carried out together with the moving bolster from the press body and the attachment attached to the transfer bar can be replaced in parallel at different locations, so the replacement time can be greatly shortened. Become.

[0008]

[Embodiment] A first embodiment of the present invention is shown in FIGS.
Will be described in detail with reference to the drawings. 1 is a plan view of a transfer press provided with a mold exchanging device, FIG. 2 is a side view of the same, FIG. 3 is a front view of the transfer press, FIG. 4 is a perspective view of a transfer bar lifter, and FIG. It is a figure. In these drawings, reference numeral 1 denotes a press main body, which internally has a moving bolster 2 which can freely move in and out of the press main body 1. On the moving bolster 2, a mold 3 is provided for each processing station W _{1 to} W _5. It has been placed. Four
Is a disstacker installed on the upstream side of the press body 1 and carries in the work 6 deposited on the pallet 5 one by one from the top into the press body 1. The transfer feeder 7 provided in the main body 1 conveys the processing stations W _{1 to} W ₅ .

The transfer feeder 7 has a pair of transfer bars 7a arranged side by side in the work transfer direction 8, and an attachment 7b such as a finger for clamping the work 6 at a position facing these transfer bars 7a.
Are detachably attached at equal intervals in the longitudinal direction, and the transfer bar 7a is divided into a plurality of parts so that the attachment 7b can be replaced by an external setup, and the transfer bar 7a is mounted on a bar pedestal 9 provided on the moving bolster 2. It can be carried out from the inside of the press body 1 in the state of being placed.

Further, a rail (not shown) is laid in front of the press body 1 so as to be parallel to the work transfer direction 8, and the moving bolster 2 is carried out from the press body 1 to the mold exchange position C shown in FIG. Is movable to the attachment exchange position A, and at the standby position B facing the attachment exchange position A with the mold exchange position C sandwiched, the die 3 and the attachment 7b to be used next are attached. Another moving bolster 2 with the set trans bar 7a set is on standby, and the moving bollast 2 on which the used mold 3 is placed is moved to the parking position, and then the mold 3 to be used next. The moving bolster 2 having been placed on is transferred into the press main body 1 via the mold replacement position C.

On the other hand, a transfer bar lifter 10 is installed at the attachment replacement position A, and a mold lifter 11 is installed at the mold replacement position C. In the transfer bar lifter 10, as shown in FIG. 4, a frame-shaped support frame 10b is horizontally fixed between two columns 10a that are erected from the floor, and each corner portion of the support frame 10b is fixed. The elevating unit 12 is installed vertically. Each of the elevating units 12 has a guide cylinder 12a penetrating the upper and lower surfaces of the support frame 10a, and a lift rod 12b is supported by the guide cylinder 12a so as to be vertically slidable. Racks 12c are vertically provided on the outer peripheral surface of the lift rod 12b, and the pinions 12d provided on the guide cylinder 12a are meshed with the racks 12c. The pinions 12d which are separated from each other in the left-right direction are interlocked with each other by a synchronous shaft 12e, and a sprocket 12f is fixed to one end of each synchronous shaft 12e. An electric motor installed on the sprocket 12f and the support frame 10a, etc. The rotary drive sources 13 are connected via endless belts 14 such as timing belts and chains, and the rotary drive sources 13 connect the pinions 12d.
Are rotated in the same direction at the same time.

A bar support 12g for supporting both ends of the transfer bar 7a from below is provided at the lower end of each lift rod 12b. 12g of these bar supports
Has a base end supported by a lower end of the lift rod 12b via a rotating shaft 12h so that the front ends thereof face each other, and the retracting mechanism 15 retracts the bar supporting position shown by the solid line in FIG. You can evacuate to. As shown in FIG. 5, the retracting mechanism 15 has an operating rod 15a supported in a lift rod 12b so as to be vertically movable.
A piston rod 15c of a retracting cylinder 15b is connected to the upper end of 5a. The retracting cylinder 15b is a solenoid valve 16
The operating rod 15a is moved up and down by the fluid pressure supplied via the lever 15e, and the lower end of the operating rod 15a is fixed to the end of the rotating shaft 12h via a link 15d.
The bar support 12g can be rotated to the bar support position and the retracted position.

On the other hand, the mold lifter 11 provided at the mold exchanging position C is installed at a position lower than the floor surface, and the mold 3 on the moving bolster 2 at the mold exchanging position C is placed via the lift pin 11a. It is possible to lift up to a height at which a mold loading / unloading device (not shown) can be loaded and unloaded. The die 3 pulled out from the moving bolster 2 by the die loading / unloading device is a stacker crane provided so as to face the attachment exchange position A, the standby position B, and the die exchange position C with the safety fence 18 in between. 19 and mold warehouse 2
It is designed to be automatically replaced by 0. The mold warehouse 20 has a large number of shelves 20a.
The molds 3 are housed in the respective shelves, and each shelf 20a is provided with an address so that the molds 3 can be easily taken in and out by computer control.

The stacker crane 19 provided between the mold warehouse 20 and the safety fence 18 is a traveling carriage 19 which moves along a rail 21 laid on the front side of the mold warehouse 20.
A mold mounting table 19c is attached to a support column 19b provided on the traveling carriage 19a so as to be vertically movable along the support column 19b. And these traveling carriages 19
The operation of a and the die mounting table 19c are also controlled by the computer, the used die 3 is stored in the shelf 20a of the designated address, and the die 3 to be used next from the shelf 20a of the designated address is stored. Mold take-out port 18 without a safety fence 18
The mold 3 is handed over to the mold loading / unloading device from a.

The operation of the first embodiment constructed as described above will now be described. When the press work is completed, the transfer bar 7 is first divided and the intermediate transfer bar 7a is placed on the bar pedestal 9 of the moving bolster 2. Then, in this state, the moving bolster 2 is moved to the attachment replacement position A via the mold replacement position C. Thereafter, the transfer bar 7a to which the die and the attachment 7b to be used next are set in advance, and the moving bolster 2 waiting at the standby position B is carried into the press body 1 through the die exchange position C, and the next press While the work is started, the lift rods 12b provided on the respective lifting units 12 of the transfer bar lifter 10 provided at the attachment exchange position A are lowered synchronously by the pinion 12d rotated by the rotary drive source 13. It At this time, the bar support 12g provided at the lower end of each lift rod 12b is retracted to the retracted position shown by the phantom line in FIG. 4 in order to avoid interference with the transfer bar 7a. And each lift rod 12b
The lower end of the moving bolster 2 stops at the attachment exchange position A, and when it reaches below the transfer bar 7a mounted on the bar receiving base 9 of the moving bolster 2 and stops, fluid pressure is supplied to the retracting cylinder 15b of the retracting mechanism 15. The operating rod 15a is lowered, the bar support 12g is rotated from the retracted position to the bar support position, and in this state, the lift rods 12b are raised and the transfer bars 7a on the bar pedestal 9 are moved to the mold. Bar support 12g up to a height that does not interfere with 3
Is lifted up by.

Next, the moving bolster 2 at the attachment exchange position A is moved to the die exchange position C, and the die 3 on the moving bolster 2 is moved by the die lifter 11 installed at the die exchange position C. After being lifted to the mold loading / unloading height, it is transferred by the mold loading / unloading device to the stacker crane 19 waiting in front of the mold replacement position C, and the mold warehouse 20 is controlled by the computer-controlled stacker crane 19.
Is stored in the shelf 20a of the predetermined address. When the used mold 3 is completely stored, the stacker crane 1
9 moves to the shelf 20a in which the mold 3 to be used next is stored, draws out the mold 3, and transfers it onto the moving bolster 2 waiting at the mold exchange position C via the mold loading / unloading device.

On the other hand, while the mold is being changed at the mold changing position C as described above, at the attachment changing position A, the transfer bar 7a is lowered to a position where it is easy to work, and in parallel with the mold changing. Then, the attachment 7b is exchanged. And the replacement of the mold 3 and the attachment 7b
When the replacement of the above is completed, the moving bolster 2 at the mold replacement position C is moved to the attachment replacement position A,
The transfer bar 7a, which has completed the replacement of the attachment 7b, is transferred to the bar holder 9 by the transfer bar lifter 10.
It is placed on the top, then moved to the standby position B, and stands by there until the pressing work is completed. The above operation is repeated every time the press work is completed. Since the die and the attachment are exchanged at different places in parallel, the exchange time can be greatly shortened.

In the first embodiment described above, the die exchange and the attachment exchange are performed at different places in parallel.
Since the attachment replacement time is longer than the mold replacement time, even if the mold replacement is completed, it is necessary to wait at the mold replacement position C until the replacement of the attachment 7b is completed, resulting in loss time. To do. Second to prevent this
In the embodiment, there are a plurality of attachment exchange positions, for example, three, and three sets of transfer bars 7a are prepared, and the moving bolster 2 in which the die 3 to be used next and the transfer bar 7a to which the attachment 7b is attached are set to the standby position. While waiting at B, the attachment 7b to be used next is exchanged to further shorten the exchange time.

Next, the second embodiment will be described with reference to FIGS. 6 and 7. The same parts as those in the first embodiment are designated by the same reference numerals and the description thereof will be omitted. In the second embodiment, as shown in FIG. 6, two additional attachment replacement positions D and E are provided adjacent to the attachment replacement position A, and the support frame 10b of the transfer bar lifter 10 has these attachment replacement positions A and D. , E can be moved. That is, a channel-shaped horizontal rod 10e is laid horizontally between the columns 10a of the transfer bar lifter 10, and is fixed to the support frame 10b on a guide rail 10f laid on the lower portion of the horizontal rod 10e. The traveling body 10g is mounted via the roller 10h. Further, the guide rail 1 in which the roller 10i provided on the upper part of the traveling body 10g is projectingly provided on the upper part of the horizontal rod 10e.
0j is abutted from the inside, and the entire support frame 10b is guided by these guide rails 10f and 10j so that it can move between the attachment exchange positions A, D and E.

Next, the operation of the second embodiment will be described.
When the transfer bar 7a to which the used mold 3 and the attachment 7b are attached is moved to the attachment exchange position A by the moving bolster 2 after the pressing work is completed, the moving bolster 2 waiting at the standby position B is moved.
Is carried into the press body 1 and the press work is started. Also, during the previous press work, the attachment replacement position D
Then, with the attachment 7b to be used next time being already attached to the transfer bar 7a, the bar pedestal 20
It is waiting above and the attachment exchange position E is empty. Next, after the transfer bar 7a to which the used attachment 7b is attached is lifted by the transfer bar lifter 10 from the moving bolster 2 which stops at the attachment exchange position A, the moving bolster 2 is moved to the mold exchange position C, and The mold 3 is replaced by the same operation as in the first embodiment, and the transfer bar 7a lifted by the transfer bar lifter 10 at the attachment replacement position A is the transfer bar lifter 1.
It is transported to the attachment exchange position E by traversing 0,
At this position, it is transferred onto the bar pedestal 20 and the replacement of the attachment 7b is started.

During this time, the transfer bar lifter 10 moves to the attachment exchange position D and waits in a state where the transfer bar 7a can be lifted up. When the moving bolster 2 moves to the attachment exchange position A after the exchange of the mold 3 is completed, the transfer bar lifter 10 at the attachment exchange position D moves the transfer bar 7 to the transfer bar 7.
a is lifted up and moved to the attachment exchange position A, and the transfer bar 7a is placed on the bar pedestal 9 of the moving bolster 2. As described above, the moving bolster 2 having the mold 3 and the transfer bar 7a to be used next is moved to the standby position B and stands by until the press work is completed. By repeating the above operation, the mold 3 and the attachment 7b can be replaced in a shorter time than in the first embodiment.

[0022]

As described above in detail, according to the present invention, the mold and the attachment attached to the transfer bar can be exchanged at different places in parallel, so that the exchange time can be shortened compared to the conventional exchange at the same place. It can be greatly shortened. As a result, the operation rate of the press does not decrease even if the number of mold changes is large, as in the case of high-mix low-volume production, so productivity can be improved and molds using a mold warehouse or stacker crane can be used. It will also be possible to automatically replace.
Further, since the mold and the attachment are replaced at different places, it is possible to safely replace the attachment even when replacing the heavy mold. Furthermore, by increasing the number of attachment replacement positions to multiple and installing a transfer bar lifter so that it can move between these attachment replacement positions, it is possible to replace the attachment to be used next during the press work. It is economical because the mold replacement time can be further shortened and a transfer bar lifter does not have to be provided for each attachment replacement position.

[Brief description of drawings]

FIG. 1 is a plan view of a transfer press provided with a mold exchanging device according to a first embodiment of the present invention.

FIG. 2 is a side view of the transfer press provided with the mold exchanging device according to the first embodiment of the present invention.

FIG. 3 is a front view of the transfer press according to the first embodiment of the present invention.

FIG. 4 is a perspective view of a transfer bar lifter provided in the mold exchanging device according to the first embodiment of the present invention.

FIG. 5 is a sectional view of a retracting mechanism provided in the mold exchanging device according to the first embodiment of the present invention.

FIG. 6 is a plan view of a transfer press provided with a mold exchanging device according to a second embodiment of the present invention.

FIG. 7 is a perspective view of a transfer bar lifter provided in a mold exchanging device according to a second embodiment of the present invention.

[Explanation of symbols]

 1 ... Press body 2 ... Moving bolster 3 ... Mold 7a ... Transfer bar 7b ... Attachment 10 ... Transfer bar lifter 11 ... Mold lifter 19 ... Stacker crane 20 ... Mold warehouse A ... Attachment replacement position B ... Standby position C ... Mold Mold replacement position D, E ... Attachment replacement position.

Claims (4)

[Claims] 1. A transfer bar 7a to which a die 3 and an attachment 7b, which have been pressed, are attached,
The moving bolster 2 moves from the inside of the press main body 1 to the attachment exchange position A via the mold exchange position C, and during this time, the moving bolster 2 waiting at the standby position B is carried into the press main body 1 to start the press work. ,
After the transfer bar 7a is lifted up by the transfer bar lifter 10 installed at the attachment replacement position A, the moving bolster 2 is moved to the mold replacement position C, and at the mold replacement position C, the mold 3 is replaced and the attachment replacement position is set. Perform the exchange of the attachment 7a in parallel with A, place the transfer bar 7a on the moving bolster 2 at the attachment exchange position A after the die exchange, and make the moving bolster 2 stand by until the next press work at the standby position B. A method of exchanging dies for a transfer press, which is characterized by: 2. A mold exchange position C and an attachment exchange position A for exchanging a die 3 carried out from the inside of the press body 1 by a moving bolster 2 and an attachment 7b attached to a transfer bar 7a in the vicinity of the press body 1. A standby position B for waiting the moving bolster 2 with the mold 3 and the transfer bar 7a to be used next is provided, and the mold exchanging position C lifts the mold 3 on the moving bolster 2 to the exchange height. A mold exchanging device for a transfer press, characterized in that a die lifter 11 and a transfer bar lifter 10 for moving up and down a transfer bar 7a conveyed by a moving bolster 2 are provided at an attachment exchange position A. 3. The mold exchanging device according to claim 2, wherein a stacker crane 19 and a mold warehouse 20 for automatically exchanging the mold 3 on the moving bolster 2 are installed near the mold exchanging position C. 4. The transfer bar 7a to which the die 3 and the attachment 7b having been pressed are attached,
The moving bolster 2 moves from the press body 1 through the mold replacement position C to a plurality of attachment replacement positions A,
Move to one of D and E, and wait position B during this
The moving bolster 2 standing by at the same time is carried into the press body 1 to start the pressing work, and the transfer bar 7a is lifted up by the transfer bar lifter 10 movable between the attachment replacement positions A, D and E. After moving the rear moving bolster 2 to the die exchange position C, the die 3 is exchanged at the die exchange position C, and the attachments are exchanged at the attachment exchange positions D and E. The moving bolster 2 is placed on the transfer bar 7a that has already completed the exchange of the attachment 7b at the exchange positions D and E and is on standby, and the moving bolster 2 is on standby at the standby position B until the next press operation. Transfer press die replacement method.