JPH05123766A - Device for carrying in/out plate material in bending apparatus for plate material - Google Patents

Abstract

PURPOSE:To easily execute the positioning of carrying-in of a plate material into the center part of a lower die and to improve the working accuracy by executing the carrying-in of the plate material to the lower die and the carrying- out of a product on the lower die with the separating devices. CONSTITUTION:The plate material carrying-in device 13 for carrying the plate material W onto the die 5 and the product carrying-out device 15 for ejecting the product P on the die 5 are arranged as individually shiftable to the carrying- in/out direction of the plate material. The plate material carrying-in device 13 and the plate material carrying-out device 15 can separately be moved to the carrying-in/out direction. As this result, the plate material carrying-in device 13 carries the plate material W onto the die and at the same time, the product P on the die can be carried out with the plate material carrying-out device 15, and the plate material is carried into the almost center part on the die and can be positioned by the above plate material carrying-in device 13. By this method, the bending work accuracy of the plate material W can be further improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plate material loading / unloading device in a plate material processing machine such as a press brake,
More specifically, a plate material carry-in / carry-out device is provided in which a plate material carry-in device for carrying in and supplying the plate material to the mold for bending the plate material and a product carry-out device for carrying out the product after the bending process are separately provided. It relates to the device.

[0002]

2. Description of the Related Art Conventionally, for example, a strip-shaped plate material having a U-shaped shape or a U-shaped end portion provided with an outward flange portion (referred to as a hat bend because the cross-sectional shape is a mountain hat shape). When a product with a relatively simple cross-sectional shape is to be bent, a special die for bending the above product in one step may be attached to the press brake to perform the bending process. It is common.

Separately from the above, a die for performing a V-shaped bending process is attached to a press brake, and a bending process is performed at a plurality of positions of a plate material by using this die, so that, for example, a U-shaped form is formed. Bending is being performed.

In the prior art, in the former case, since it is a dedicated mold, one machining time is short, but since the plate material is supplied to the mold manually, there is a problem in improving the efficiency. is there.

In the latter case of the prior art, there is an advantage that the mold cost can be reduced because the mold can use a normal mold. However, since there is a problem in improving the efficiency in the case of manual work, automation is attempted by using an industrial robot or the like.

When an industrial robot such as the one described above is used, there is a problem that the robot itself is expensive and the teaching work takes time even though it is a relatively simple bending process.

[0007]

Therefore, the inventor of the present invention automatically conveys the plate material from one side of the plate material bending machine to the mold of the bending machine and extrudes the bent product. We have developed a board material loading and unloading device.

The plate material loading / unloading device according to the above-described development has a structure in which the product pushing tool is provided on one side of the plate material holding device for clamping the vicinity of the end portion of the strip-shaped plate material, and therefore the plate material is loaded into the mold. At this time, there is an advantage that the product on the mold can be extruded and carried out.

However, in order to surely push the product out of the mold and carry it out, it is necessary to move the plate material holding device to the vicinity of the end of the mold, and the positioning position of one end of the plate material with respect to the mold is always constant. Is.

Therefore, for example, when the strip-shaped plate material is relatively short, the plate material is bent at a position deviated to one end side of the mold, which is not desirable for improving accuracy.

[0011]

In view of the problems as described above, the present invention is to carry a plate material into a mold of the bending machine from one side of the bending machine for bending the plate material. A plate material carry-in / carry-out device for carrying out the product on the mold, and a plate material carry-in device for carrying the plate material onto the mold, and a product carry-out device for pushing out the product on the mold to carry-in / carry-out the plate material. It is provided so as to be individually movable in the direction.

[0012]

According to the above construction, the plate material carry-in device and the plate material carry-out device can be separately moved in the plate material carry-in / carry-out direction, so that the plate material carry-in device carries the plate material onto the die at the same time. Thus, the product on the mold can be carried out, and the plate material can be carried in and positioned by the plate material carrying-in device in the substantially central portion of the mold.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION In order to facilitate understanding of the present invention, a general structure of an apparatus to which the present invention can be applied and its related apparatus will be briefly described with reference to FIG.

Now, referring to FIG. 5, a press brake is illustrated in this embodiment as a bending machine 1 for bending the plate material W. A lower mold 5 is mounted on the lower frame 3 of this press brake,
An upper die 9 that cooperates with the lower die 5 is provided below the ram 7 that can move up and down.

Since the structures of the upper and lower molds 9 and 5 for bending the press brake and the plate material W into, for example, a U-shape are known, a more detailed description will be omitted.

A plate material separating device 11 for separating the stacked strip-shaped plate materials W one by one is arranged on one side of the bending machine 1, and the plate materials are arranged on the front side of the lower mold 5. A plate material carrying-in device 13 for carrying in the plate material W separated by the separating device 11 onto the lower mold 5 is arranged, and a product carrying-out device 15 for extruding and carrying out the bent product is arranged. On the other side of the bending machine 1, a box-shaped product stocker 16 for storing the products bent by the upper and lower molds 9 and 5 is arranged.

The plate material separating device 11 comprises a stocker 1
The plate members W stacked on the plate 7 are separated and lifted up one by one, and an elevating frame 21 having a vacuum pad 19 for adsorbing the plate members W is vertically movable. The elevating frame 21 is attached to the lower end of a vertically movable piston rod in an elevating cylinder 23, and the elevating cylinder 23 is supported by a supporting bracket 25 that is vertically provided.

On the upper surface of the material stocker 17, a plurality of guide pins 27 for preventing the positional deviation of the laminated plate materials 5 are provided upright, and plate material separation for separating the plate materials 5 one by one. A container 28 is attached.

With the above structure, the elevating frame 21 of the plate material separating apparatus 11 is lowered so that the vacuum pad 1
By sucking the uppermost plate material W by 9, the stacked plate materials W can be separated and lifted one by one.

The plate material carry-in device 13 has a function of carrying in the plate material W lifted by the vacuum pad 19 of the plate material separating device 11 onto the lower die 5 as described above, and the plate material carry-out device 15 is The bent product is carried out from the lower die 5 to the product stocker 16, and is unitized so that it can be easily mounted on the lower frame 3 of the bending machine. It is configured like.

That is, as shown in more detail in FIGS. 1 to 3, on the front side (lower side in FIG. 1) of the lower mold 5, a plurality of support plates 29 extending in the left-right direction in parallel with the lower mold 5 are provided. It is attached to the lower frame 3 via bolts 31.
Support brackets 33R and 33L are erected on both left and right ends of the support plate 29, and a horizontally installed guide 35 is provided between the support brackets 33R and 33L and a rodless cylinder 37. The left and right ends of are supported.

A slider 39, which is moved in the left-right direction by the operation of the rodless cylinder 37, is movably supported on the guide 35, and a support block 41 is mounted on the slider 39. A cylinder 43 for forward and backward movement is mounted on the support block 41, and a work clamp 45 as a workpiece holding device for holding the plate W is attached to a tip end portion of a piston rod 43P of the cylinder 43 for forward and backward movement.

The work clamp 45 is provided with a clamp cylinder 47 for pressing and fixing the vicinity of the end of the plate material W to the lower jaw 45J.

The plate material unloading device 15 includes the guide 35.
A slider 51, which is guided by the guide 35 and is movable in the left-right direction, is provided by the operation of a carry-out rodless cylinder 49 provided in parallel with. On the support block 53 mounted on the slider 51, a forward / backward movement rod 55 having a push-up pad 55P for pushing out the bent product P to the product stocker 16 and carrying it out is movable back and forth. It is supported, and a piston rod 57P of a forward / backward movement cylinder 57 mounted on the support block 53 is appropriately connected to the forward / backward movement rod 55.

In the above structure, the rodless cylinder 3
7 is operated to move the slider 39 to the support bracket 33L side, and the slider 39 is attached to, for example, a stopper (not shown).
Abutting against and positioning appropriately, the work clamp 45
Is a position corresponding to the right end portion of the plate material W lifted by the vacuum pad 19 in the plate material separating apparatus 11.

Therefore, when the piston rod 43P of the forward / backward movement cylinder 43 is extended when the positioning is performed as described above, the vacuum pad 19
The end portion of the plate material W lifted by the lower jaw 4 is
Since it is supported by 5J, the plate material W can be gripped by the work clamp 45 by operating the clamp cylinder 47.

After gripping the vicinity of the end of the plate material W by the work clamp 45 as described above, the vacuum pad 1
By releasing the holding by 9 and operating the rodless cylinder 37 to move the slider 39 to the right,
The plate material W can be carried into the lower mold 5.

When the plate material carry-in device 13 is moved leftward and positioned as described above, the plate material carry-out device 15 is also moved leftward in advance so as to be adjacent to the plate material carry-in device 13 and is moved rightward. In order to push the end portion of the product P by the pushing pad 55P of the forward / backward moving rod 55, the forward / backward moving rod 55 is largely projected onto the lower mold 5.

Therefore, as described above, when the plate material W is gripped by the work clamp 45 and the plate material W is carried into the lower mold 5, the product on the lower mold 5 is moved by the pushing pad 55P provided in the plate material carrying-out device 15. Already pushed, product stocker 1
It will be dropped to 6.

The horizontal positioning of the plate material W with respect to the lower die 5 is performed by the slider 39 contacting a stopper 59 fixed on the support plate 29 so as to be positionally adjustable in the horizontal direction. Therefore, by adjusting the position of the stopper 59 in advance, the plate material W can be carried in and positioned in the central portion of the lower mold 5.

As described above, after the plate material W is loaded onto the lower die 5 and positioned, the work clamp 45 releases the grip of the plate material W, and the piston rod 4 of the cylinder 43 for forward / backward movement.
The work clamp 45 is separated from the plate material W by retracting 3P, and the plate material W is moved by the upper and lower molds 9 and 5.
The bending process is started.

While the plate material is being bent by the upper and lower molds 9 and 5 as described above, the plate material carry-in device 13 and the plate material carry-out device 15 are returned to their original positions on the left side,
In addition, by holding the next plate material W in the work clamp 45 and waiting it, the product P can be carried out immediately after the bending process of the plate material W by the upper and lower molds 9 and 5 is completed, and the next new The plate material W can be immediately loaded onto the lower mold 5.

By the way, in the above-mentioned embodiment, the configuration in which the plate material carry-in device 13 and the plate material carry-out device 15 are moved in the left-right direction by using the respective rodless cylinders 37 and 49 has been described. However, the magnet M is provided in at least one of the plate material loading device 13 and the plate material unloading portion 15.
By providing g, the rodless cylinder 37 on the plate material carry-in device 13 side can be omitted.

That is, in FIG. 1, the plate material unloading device 15
When moving to the left, the plate material carry-out device 15 pushes the plate material carry-in device 13 to the left. Then, when the plate material carry-out device 15 is moved to the right, the magnet Mg
As a result, the plate material carrying-in device 13 is magnetically attached and integrally moved to the right. After that, after the plate material carrying-in device 13 comes into contact with the stopper 59 and stops, the connection by the magnet Mg is released and only the plate material carrying-out device 15 moves to the right.

The plate material carry-in device 13 and the plate material carry-out device 1
The connection and disconnection with 5 are not limited to the above magnets, and other appropriate connection devices can be adopted.

FIG. 4 is a plan view showing the second embodiment. In this embodiment, instead of the rodless cylinder 37, the belt 6 driven by the servomotor M is driven.
1, the slider 39 in the plate material carrying-in device 13 is connected, and other configurations are the same as those in the above-described embodiment.

In this embodiment, since the plate material carry-in device 13 can be moved and positioned in the left-right direction by controlling the servomotor M, even if the length of the plate material W changes, the lower mold 5 The plate material W can be easily positioned at the central portion of the.

[0038]

As can be understood from the above description of the embodiments, according to the present invention, the loading of the plate material W into the lower die 5 and the unloading of the product on the lower die 5 are performed by separate devices. Because of the configuration, the plate material W can be easily carried in and positioned in the central portion of the lower mold 5.

Therefore, the bending accuracy of the plate material W can be further improved.

[Brief description of drawings]

1 is an enlarged cross-sectional view taken along the line I-I in FIG.

FIG. 2 is a sectional view taken along line II-II in FIG.

3 is a sectional view taken along line III-III in FIG.

FIG. 4 is a plan view showing a second embodiment.

FIG. 5 is a schematic front view showing the overall configuration.

[Explanation of symbols]

 1 Bending machine 5,9 Mold 13 Plate material loading device 15 Plate material unloading device

Claims (1)

[Claims] 1. A plate material carrying-in / out apparatus for carrying in a plate material from one side of a bending machine for bending a plate material onto a mold of the bending machine and carrying out a product on the mold, A plate material carrying-in device for carrying in a plate material onto the mold, and a product carrying-out device for pushing out a product on the mold are individually provided so as to be movable in a carrying-in / carrying-out direction of the plate material. A plate material loading / unloading device for a bending device.