JPH11718A - Bending system, method for changing die used for this bending system and device therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bending system with which flexible deal with various conditions such as the cross-sectional shape of die, length of die and stage layout, changing method of a die which is used for this bending system is enabled and device therefor. SOLUTION: Working data, order of bending work, die to be used and necessity or unnecessity of turning-over of die are decided based on the data of product shape with an automatic programming device 5 and bending work is executed with a bending machine 1 based on this decided working data, working order of bending and die to be used. The die to be used for this bending work is retrieved based on the data of the die to be used and the data of the number which are selected for each bending stage with the automatic programming device 5 and selected from a die storage shelf 9. This selected die is turned over based on the information of necessity or unnecessity of the turning-over of die which is decided with the automatic programming device 5 and automatically efficiently mounted to the die mounting part 21 of the bending machine 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bending system for selecting a die for bending and supplying a desired die to a bending machine, a die changing method used in the bending system, and a device therefor.

[0002]

2. Description of the Related Art Conventionally, a method of exchanging a die composed of a punch and a die in a bending machine for bending a plate material, for example, in a general-purpose press brake, mainly includes through-bending and small products. There are cases.

In the former method of exchanging dies mainly using through-bending, several types of dies having different cross-sectional shapes having a length substantially corresponding to the entire length of the bending machine are stored in advance in a table such as an upper table, and these are stored in advance. The dies are alternately replaced on the punch side by a drive device such as a chain drive or an air cylinder, and the dies are replaced by sliding several basic dies in the horizontal direction on the upper surface of the lower table.

In the latter method of exchanging a mold mainly for small articles, a punch and a die are mounted on a turret by a die set method, and a desired set of molds is rotated and moved between upper and lower tables. I do. Also, by providing a plurality of dies of the same cross-sectional shape divided in the longitudinal direction, by sliding some of the plurality of dies in the longitudinal direction of the press brake according to the required length. Some only change the length.

[0005]

However, in the above-described conventional mold exchanging method, the former cannot change the length of the mold, the front and back sides of the mold, and the stage layout of the mold over the entire length of the table. There was a problem.

In the former, the length of the mold cannot be changed on the die side, and since the molds are basically arranged in a horizontal plane, interference between the workpiece and the mold is likely to occur, and the product shape is reduced. There was a problem of being restricted.

[0007] In the latter case of the above-mentioned conventional mold exchanging method,
Due to the restriction of length due to the use of the die set method for relatively elongated molds, and the use of different die sets for different lengths even if the molds have the same cross-sectional shape, the number of mold sets increases, and so on. There is a problem that a large number of die sets cannot be provided due to spatial restrictions.

Further, in the latter case, when a plurality of dies having the same cross-sectional shape divided in the longitudinal direction are provided, only the length can be changed, but the cross-sectional shape of the dies cannot be changed. .

Most bending machines, such as press brakes, mainly produce various types in small quantities. However, in the conventional mold changing method, as described above, they are used for mass production in relatively similar shapes. There was a problem that it could not cope with small-quantity production.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a bending system capable of flexibly responding to various conditions such as a mold sectional shape, a mold length, and a stage layout. Another object of the present invention is to provide a method and an apparatus for exchanging a mold used in the bending system.

[0011]

In order to achieve the above object, a bending system according to the present invention according to claim 1 is configured to determine processing data, bending order, used dies, and necessity of die reversal based on product shape data. Automatic programming device to be determined, bending machine that performs bending based on information of processing data, bending process order, and used mold determined by this automatic programming device, and multiple molds can be searched in mold storage shelf freely A mold exchange for storing and unloading, attaching a desired mold from the mold storage shelf to the mold attaching portion of the bending machine, and inverting the mold based on the information on necessity of mold inversion determined by the automatic programming device. Device, based on the information of the used mold data and the number data selected for each bending process in the working order determined by the automatic programming device. The address in the mold storage shelf is searched, the mold at this address is taken out by the mold exchanging device, and the mold is inverted based on the necessity information of the mold inversion and mounted on the mold mounting portion of the bending machine. It is characterized by doing.

Therefore, the automatic programming device determines the processing data, the bending order, the die to be used, and the necessity of reversing the die based on the product shape data, and determines the determined processing data, the bending order, and the die to be used. Bending is performed by a bending machine based on the above. The dies used for the bending process are searched by the automatic programming device based on the used dies data and the number data selected for each bending step, and are selected from the die storage shelves. The selected mold is inverted based on the information on the necessity of mold inversion determined by the automatic programming device, and is automatically and efficiently mounted on the mold mounting portion of the bending machine.

According to a second aspect of the present invention, there is provided a mold exchanging method comprising a plurality of punches and dies stored at predetermined addresses in a mold storage shelf provided on the back or front surface of a table of a bending machine. The automatic programming device automatically selects and takes out the desired punches and dies to be used based on the product shape data, and punches and dies are bent after the punches and dies are inverted based on the mold inversion necessity information. It is characterized in that it is automatically mounted on a mold mounting part of a machine.

Therefore, a mold storage shelf for storing a mold is provided on the back or front surface of the table of the bending machine, and a mold to be used is automatically selected and taken out from the mold storage shelf, and a mold reversal is required. After reversing the mold based on the rejection information, it is automatically and efficiently transferred to the mold mounting part of the bending machine and mounted, so it can be used for various small-quantity production and can be used for various devices inside the bending machine main body. The space inside the bending machine main body is effectively used without any trouble.

According to a third aspect of the present invention, there is provided a mold exchanging apparatus for storing a mold comprising a plurality of punches and dies on a back or front surface of a table of a bending machine at a predetermined address so as to be able to be stored and taken out. A product shape data inputting means for inputting product shape data, and a used mold for determining a mold to be used based on the product shape data inputted by the product shape data inputting means and for determining whether or not mold reversal is necessary. Determining means, mold searching means for searching for the address in which the mold determined by the used mold determining means is stored, and a clamp device capable of detachably mounting the mold searched by the mold searching means. And a mold conveying means for positioning and conveying the position of the mold so as to mount the clamped mold on a mold mounting portion of a bending machine. That.

Therefore, the product shape is input by the product shape data input means, the used mold is determined by the used mold determining means based on the product shape data, and the necessity of mold reversal is determined. The determined mold is searched from the molds in the mold storage shelf by the mold search means, and the mold in the mold storage shelf is clamped and removed by the clamp device by the mold transport means. It is positioned so that it can be mounted on the die mounting part, and is mounted on the die mounting part.

According to a fourth aspect of the present invention, there is provided a mold exchanging apparatus according to the third aspect, wherein the clamping device is configured to store a clamped punch in the mold storage shelf and a posture of a bending machine. It is characterized by being provided rotatable about a horizontal axis in order to convert it to a machine mounting state in which it is mounted on a mold mounting portion.

Therefore, when the mold mounting part of the bending machine is downward, the machine mounting state and the storage state posture to be attached to the die mounting part differ by 180 ° up and down.
Since the clamp device rotates around the horizontal axis, the machine mounting state and the storage state of the mold can be easily adjusted during the process of bending the mold and moving between the mold mounting part of the machine and the mold storage shelf. Changed automatically.

According to a fifth aspect of the present invention, there is provided a mold exchanging apparatus according to the fourth aspect, wherein a punch from the clamp device is detachable and the punch is reversed. Is provided.

Therefore, in order to prevent the interference between the workpiece and the mold, there is a case where the mold is turned upside down and mounted on the mold mounting portion of the bending machine in order to prevent interference between the work and the mold. Since the mold is automatically turned upside down, it can cope with various small-lot productions successfully.

According to a sixth aspect of the present invention, there is provided a mold exchanging apparatus according to the fifth aspect, wherein the mold reversing apparatus is rotatable about a vertical axis to invert the front and back of the punch. It is a feature.

Accordingly, since the mold is rotated around the vertical axis, the mold can be easily turned upside down with a simple device, while easily balancing the weight of the mold.

According to a seventh aspect of the present invention, there is provided a mold exchanging apparatus according to the fifth or sixth aspect, wherein the mold reversing device is provided on the back or front surface of the table. Things.

Therefore, since the mold reversing device is provided on the back surface of the table, it does not hinder various devices and hydraulic tanks inside the main body of the bending machine, and makes the space inside the main body of the bending machine effective. Since it is used, no other storage space is required, so the overall space is reduced.

[0025]

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

FIG. 1 shows a press brake 1 as a bending machine according to the present embodiment, and a die changing device 3 for the press brake 1.

The press brake 1 can be of a general type. However, in order to manage the abrasion state of the mold, the type of the press brake 1 can be output to a higher-level server which is a parent machine (not shown). desirable.

The mold changing device 3 is connected to and controlled by an automatic programming device 5 such as a personal computer. The automatic programming device 5 determines a bending order and uses a mold shape, a mold length, and the like based on a three-sided view, a development view, or a three-dimensional view showing the shape of a target processed product in the press brake 1. Automatically or by an operator's designation, to determine the necessity of reversing the selected die, to calculate the back gauge position (L value) during processing, to calculate the ram stroke amount (D value),
Performs preparation of setup documents.

The automatic programming device 5 is connected to the NC device 7 which is a control device of the press brake 1 which is a slave unit, and the NC data obtained as described above (mainly for obtaining a bending angle). The machining information such as L value and D value for controlling the final position of the ram, mold data and bending sequence data is transmitted to the NC device 7 of the press brake 1.
Send to For the mold data, the mold changing device 3
Sent in parallel.

The mold exchanging device 3 includes a mold storage shelf 9 for storing punches P and dies D of various shapes and dimensions so as to be able to be stored and taken out, a mold shelf management control device 11, and an internal processing device not shown. The mold 13 comprising the punch P and the die D is provided with a detachable clamp device 15. The mold 13 clamped by the clamp device 15 is used as the mold for the upper and lower tables 17 and 19 of the press brake 1. A die transfer device 23 (die transfer means) for transferring and mounting to the mounting unit 21 is provided. The mold mounting section 21 is constituted by a device that automatically clamps and releases the mold 13, and as shown in FIG. 2, an automatic punch clamper 25 for mounting a punch P and an automatic punch clamper 25 for mounting a die. The die clamper 27.

The mold storage shelf 9 has a multi-stage shelf provided on the back surface of the upper table 17 of the press brake 1.
Each shelf has its own address. Each mold 1
Reference numeral 3 stores various molds 13 having different cross-sectional shapes, lengths, and the like. Each address has not only one punch P or die D but also one set of processing punches P and die D in combination. Are also stored.

The mold storage shelf 9 is not limited to the back surface of the upper table 17 as shown in the present embodiment, but can be provided, for example, on the surface of the upper table 17 of the press brake 1. If 1 is a ram descending type, the lower table 19
Can be provided on the back surface or the front surface.

The molds 13 stored in the mold storage shelf 9 are composed of segments of various dimensions, and it is possible to select a mold 13 of an arbitrary length by combining the segments. I have.

The mold shelf management control device 11 includes a mold storage shelf 9.
Combination of mold shape and segment stored in
The shelf address is stored as a database, and a desired mold 13 is selected from the shelf based on the mold data sent from the automatic programming device 5 and transported to the mold mounting portion 21 of the press brake 1. Control for mounting.

The mold shelf management control device 11 is connected to the NC device 7 of the press brake 1 by a network, and uses the information on the number of times of machining for each mold segment transmitted from the NC device 7 as a database. Have.

The information on the number of times of processing is used for grasping the state of wear of the mold 13, and it is possible to inform the operator that the mold 13 used a predetermined number of times should be polished. Further, the processing frequency information is stored as needed in a higher-level server (database), not shown, as processing results via the NC device 7 of the press brake 1.

An internal processing device, not shown, such as a man-machine interface, requires a blank material (development view) before processing, a drawing, a three-dimensional figure after processing or a bending line required for each worker. Graphic information including bending line information for confirming or selecting the mold 13 is obtained as external information.

Information required for production management, such as product names and quantities, is also networked. The operator who designates the mold 13 calls the product number to start the machining, and supports the machining portion of the product to be machined from the drawing, so that the necessary mold 13 is attached to the mold mounting portion 2 of the press brake 1.
1 so that it is transported and mounted.

Referring to FIG. 1, the mold conveying device 23 holds the mold 13 clamped by the clamp device 15 in the X-axis direction (horizontal direction in FIG. 1), the Z-axis direction (vertical direction in FIG. 1), and the Y-axis. It is movable in a direction (a direction perpendicular to the plane of the paper in FIG. 1).

More specifically, on both sides of the press brake 1 in the longitudinal direction, Z-axis guide beams 29 extend in the Z-axis direction, and an X-axis guide beam 31 having a length extending over the two Z-axis guide beams 29 is provided. Are guided by the two Z-axis guide beams 29 so as to be movable and positioned in the Z-axis direction. That is, the X-axis guide beam 31 is moved and positioned in the Z-axis direction by a known drive mechanism (not shown) including a servomotor, screws, nuts, and the like.

The lower surface of the X-axis guide beam 31 is shown in FIG.
As shown in FIG. 2, the X-axis guide rail 33 extends in the X-axis direction, and the Y-axis guide beam 35 is provided along the X-axis guide rail 33 so as to be movable and positioned in the X-axis direction. Similarly to the X-axis guide beam 31, the Y-axis guide beam 35 is moved and positioned in the X-axis direction by a known drive mechanism (not shown) including a servomotor, screws, nuts and the like.

The lower surface of the Y-axis guide beam 35 is shown in FIG.
As shown in the figure, the Y-axis guide rail 37 extends in the Y-axis direction, and the clamp device 15 for clamping the mold 13 is guided by the Y-axis guide rail 37 via the clamp device support member 39. It is provided so as to be movable and positionable in the Y-axis direction. Similarly to the X-axis guide beam 31 and the Y-axis guide beam 35, the clamp device support member 39 is moved and positioned in the Y-axis direction by a known drive mechanism (not shown) including a servomotor, screws, nuts, and the like.

As shown in FIGS. 3 and 4, the clamp device 15 has a clamp device main body 41 supported by a clamp device support member 39 via a bearing 43 so as to be pivotable in the vertical direction. A turning motor 45 connected to the bearing portion 43 is fixed to the clamp device support member 39,
The clamp device main body 41 is rotated 180 ° by the rotation motor 45.
Is turned at an angle of

Further, the clamp device main body 41 is provided with a pair of jaws each including a fixed jaw 47 and a movable jaw 49, and the movable jaw 49 is attached to the clamp device main body 4.
1. a jaw guide rail 51 extending longitudinally to the front
Are provided so as to be able to approach and separate from the fixed jaw 47 along the axis. A clamp drive motor 53 is fixed to the rear surface of the clamp device main body 41, and the movable jaw 49 moves via a rack 57 that meshes with a pinion 55 provided on the drive shaft. Can be clamped accordingly.

The die 13 clamped by the pair of jaws 47, 49 is turned by the turning motor 45 so that the tip of the die 13 is turned upward or downward.

Further, on the back surface of the upper table 17, a mold front / back reversing device 59 for reversing the front and back of the punch P is provided as shown in FIG.

Referring to FIG. 2, the mold upside down device 59 is used.
A reversing device main body 61 is fixed to the back surface of the upper table 17, and a reversing table 65 is provided on the upper surface of the reversing device main body 61, which is turned 180 ° about a vertical axis by a reversing drive motor 63, This reversing table 65
The punch mounting part 6 on which the base of the mold 13 is removable
7 are provided.

Referring to FIG. 5, the search operation of the mold 13 will be described. First, when searching and selecting the punch P, depending on the type of the intermediate plate used, for example, from items such as a one-touch intermediate plate, a short intermediate plate, a double-sided intermediate plate, a dial-type intermediate plate, and a hydraulic clamp intermediate plate. Select the appropriate one. In addition, for the cross-sectional shape, a corresponding item is selected from items such as straight sword, R punch P, gooseneck, and step bending. Further, from the item of the length, a corresponding one such as a division, a hinge mold and the like is selected. Since the punch P is selected as described above, the mold shelf management control device 11 transfers the corresponding punch P from the mold storage shelf 9 to the mold mounting section 21 of the press brake 1.
To be mounted on.

On the other hand, in the selection of the die D, a corresponding one is selected from items such as a one-touch die holder and a split die holder according to the type of die holder. In addition, a corresponding dimension is selected as the V width, and a corresponding one is selected from items such as acute angle bending and step bending. Further, a corresponding one is selected from items such as a 2V die and a 1V die for a sash from the cross-sectional shape of the bending process. Since the die D is selected as described above, the die shelf management control device 11 removes the die D from the die storage shelf 9 into the automatic die clamper 27 of the press brake 1.
To be mounted on.

As described above, when the operator searches for the product number and the bending process from the actual item list with the bar code and presses the mold setting start button to start the operation, the desired mold 13 is automatically set. .

As an example, the punch P shown in FIG.
The operation of automatically mounting the upper table 17 at the lower end of the upper table 17 will be described.

Based on the used mold data and the number data selected by the automatic programming device 5, the pair of jaws 47 and 49 of the clamp device 15 are moved to the desired punch P in the punch P rack 57 of the mold storage shelf 9. 1 and 2, the X-axis guide beam 31 is moved and positioned along the Z-axis guide beam 29 in the Z-axis direction, and the Y-axis guide beam 35 is moved to the X-axis direction.
X along the X-axis guide rail 33 of the axis guide beam 31
It is moved and positioned in the axial direction.

As shown in FIG. 1, the mold storage shelf 9 is divided into a punch rack 69 for storing the punches P at the upper part and a die rack 71 for storing the dies D at the lower part. In the clamp device 15 moved and positioned in front of the desired punch P in the punch rack 69, the movable jaw 49 is previously widened from the desired punch P by the clamp drive motor 53 with respect to the fixed jaw 47. Along the Y-axis guide rail 37 on the lower surface of the axis guide beam 35, it is advanced and moved and positioned in the Y-axis direction via the clamp device support member 39.

The movable jaw 49 moves to move the pair of jaws 4
When the desired punch P is clamped at 7 and 49, the X-axis guide beam 31 is slightly raised, and the base of the punch P is pulled out of the storage portion of the punch rack 69. Next, the clamp device supporting member 39 is retracted in the Y-axis direction, and the punch P
It is positioned as shown in position A ₁ of the two-dot chain line in. The posture A ₁ is a storage state posture punch P has been housed in the mold storage rack 9.

Here, the automatic punch clamper 25 (the mold mounting portion 2) at the lower end of the upper table 17 of the press brake 1 is used.
FIG. 2 shows the posture of the punch P mounted in 1) in the machine mounting state.
A posture C ₄ as shown in solid lines.

Therefore, the punch P in the above-described posture A ₁
It is necessary to reverse the front and back of the punch P is caused because the clamping device the support member 39 is not in the position C ₄ is turning at an angle of 180 ° by the turning motor 45. The necessity of mold inversion is determined in advance by the automatic programming device 5, and is instructed by the mold shelf management control device 11 based on the mold inversion necessity information from the automatic programming device 5. And Y-axis guide beam 3
5 is moved in the Z axis direction and the X-axis direction, the punch P of the clamping device 15 is positioned to the punch mounting portion 67 of the inversion table 65 of the mold reversing device 59 is mounted in a posture A _2.

Next, the clamp device 15 retreats in the Y-axis direction and waits, and the reversing table 65
Is rotated by 180 ° around the vertical axis, and the punch P
It is inverted from the attitude A ₂ as shown in FIG. 2 in position B _1.

As described above, the mold reversing device 59 is a simple device, but can automatically and efficiently change the position of the front and back of the punch P while balancing the weight of the punch P around the vertical axis. Since the mold can be inverted in accordance with the posture of the state of attachment to the mold mounting portion 21, it is possible to successfully cope with various kinds of small-quantity production.

[0059] clamping device 15 is advanced again in the Y-axis direction, the punch P the posture B ₁ of the mold reversing device 59 is located as shown is taken out by the clamping device 15 to the position B ₂ in FIG. 2 I do.

The punch P in the above-described posture B ₂ is turned into the same posture C ₁ as the posture C ₄ which is the machine-attached posture of the punch P by turning the clamp device main body 41 at an angle of 180 ° by the turning motor 45. Turned.

As described above, although the machine mounted state and the stored state are different from each other by 180 ° in the vertical direction, the posture of the punch P can be automatically changed because the clamp device 15 rotates around the horizontal axis. Can handle small-lot production successfully.

The X-axis guide beam 31 and the Y-axis guide beam 35 move in the Z-axis direction and the X-axis direction according to instructions from the mold shelf management control device 11, and the clamp device 15 moves in the Y-axis direction. the posture C _2, through the posture C ₃ is mounted in position C ₄ in the mold mounting portion 21 of the press brake 1.

The operation of removing the punch P from the automatic punch clamper 25 at the lower end of the upper table 17 of the press brake 1 and automatically storing the punch P in the mold storage shelf 9 is the reverse of the operation described above. Description is omitted.

The operation of automatically taking out the die D from the mold storage shelf 9 and automatically mounting the die D on the die D mounting portion on the upper surface of the lower table 19 of the press brake 1 and the reverse operation are the same as those of the punch P described above. Since the operation is the same as that described above, the description thereof is omitted.

As described above, the desired punch P, die D
Is automatically selected and retrieved from the mold storage shelf 9, conveyed, and mounted on the mold mounting portion 21 of the press brake 1 to perform a desired bending process.

As described above, the die changing device 3 accurately selects and searches for the die determined at the time of producing the development view in the sheet metal processing, determines whether or not the die reversal is necessary, and determines this. After the mold is inverted based on the data, it is conveyed and automatically and efficiently attached to the mold attaching portion 21 of the press brake 1.

Therefore, the dies can be exchanged efficiently in response to the production of many kinds and small quantities. In addition, since the dies storage shelf 9 is provided on the back surface of the upper table 17 of the press brake 1, the inside of the main body of the press brake 1 is provided. The space inside the main body of the press brake 1 is effectively used without hindering various devices.

The mold exchanging device 3 in the above-described embodiment performs the selection / transportation of the mold based on the mold information from the automatic programming device 5, but FIG. The figure shows a case where the product shape data is input from the provided product shape data input means 73, a die is selected, inverted, transported, and mounted on the die mounting portion 21 of the bending machine.

In this case, the mold exchanging device 3 inputs the mold shape data directly to the mold exchanging device 3 and the mold storage shelf 9 for accommodating a plurality of dies at predetermined addresses so as to be able to be stored and taken out. A product shape data inputting means 73 to be used, a tooling type determining means 75 for determining a tooling to be used based on the product shape data input by the product shape data inputting means 73 and determining whether or not the mold inversion is necessary; Mold search means 77 for searching the address where the mold determined by the use mold determination means 75 is stored, and this mold search means 77
And a mold transport means for positioning the mold in order to mount the clamped mold on the mold mounting portion 21 of the bending machine and transporting the clamped mold. 23.

As described above, by directly inputting the data into the mold exchanging apparatus 3, a desired mold is accurately taken out of the mold storage shelf 9 in a short time and bent as shown by a solid arrow in FIG. The die mounted on the die storage unit 9 is automatically mounted on the die mounting part 21 of the machine, and the die mounted on the die mounting part 21 of the bending machine as shown by a dotted arrow in FIG. Storing in a predetermined location can be performed automatically.

The present invention is not limited to the above-described embodiment, but can be embodied in other forms by making appropriate changes.

[0072]

As will be understood from the above embodiment, according to the first aspect of the present invention, the automatic programming device performs the processing data, the bending processing order, the die to be used, and the like based on the product shape data. The necessity of mold reversal is determined, and bending is performed by a bending machine based on the determined processing data, bending order, and die to be used. The dies used for the bending process can be searched by the automatic programming device based on the used dies data and the number data selected for each bending process, and can be selected from the dies storage shelf. The selected mold is inverted based on the information on the necessity of mold inversion determined by the automatic programming device, and can be automatically and efficiently mounted on the mold mounting portion of the bending machine. As described above, a bending system capable of flexibly responding to various conditions such as a mold cross-sectional shape, a mold length, a stage layout, and the like, and a mold changing method used in the bending system, which correspond to various kinds of small-quantity production. Can be provided.

According to the second aspect of the present invention, the mold to be used is automatically selected and taken out from the mold storage shelf for storing the mold on the back surface or the front surface of the table of the bending machine. Can be automatically and efficiently transported to the die mounting part of the bending machine and mounted after the mold is reversed based on the standard. Without using, the space inside the bending machine body can be effectively used.

According to the third aspect of the present invention, the product shape is inputted by the product shape data input means, the used mold is determined by the used mold determining means based on the product shape data, and the necessity of the mold reversal is determined. decide. The above-mentioned determined mold is searched for from the mold in the mold storage shelf by the mold search means, and the mold in the mold storage shelf is clamped and taken out by the clamp device by the mold transfer means. It is positioned so that it can be mounted on the die mounting part, and can be automatically and efficiently mounted on the die mounting part of the bending machine.

According to the fourth aspect of the present invention, when the mold mounting portion of the bending machine is downward, the machine mounted state and the stored state mounted on the mold mounting section are vertically shifted by 180 degrees.
° Different, but since the clamp device is rotated about the horizontal axis, the machine mounting state and the storage state of the mold are bent during the movement of the mold between the mold mounting part of the machine and the mold storage shelf. It can be easily and automatically changed.

According to the fifth aspect of the present invention, depending on the shape of the product, there is a case where the mold is turned upside down and attached to the mold mounting portion of the bending machine in order to prevent interference between the workpiece and the mold. However, since the mold reversing device automatically reverses the front and back of the mold, it is possible to cope with various kinds of small-quantity production.

According to the sixth aspect of the present invention, since the mold is rotated about the vertical axis, it is a simple device, but the mold can be easily turned upside down while balancing the weight of the mold.

According to the seventh aspect of the present invention, since the mold reversing device is provided on the back surface of the table, there is no obstacle to various devices and the hydraulic tank in the main body of the bending machine.
The space inside the main body of the bending machine is effectively used, and no other storage space is required, so that the space can be reduced as a whole.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a bending system according to the present invention and a die changing device used in the bending system.

FIG. 2 is a side view showing the overall operation of a bending system according to the present invention and a mold changing apparatus used in the bending system.

FIG. 3 is a plan view of the clamp device according to the present invention.

FIG. 4 is a side view of the clamp device according to the present invention.

FIG. 5 is an explanatory diagram showing an example of a search item when selecting a die to be used.

FIG. 6 is an explanatory diagram showing a configuration of a mold changing apparatus and a flow of mold changing.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Press brake 3 Die changer 5 Automatic programming device 7 NC device 9 Die storage shelf 11 Die shelf management control device 13 Die 15 Clamping device 17 Upper table 19 Lower table 21 Die mounting part 23 Die transfer device 29 Z-axis guide beam 31 X-axis guide beam 35 Y-axis guide beam 41 Clamping device main body 45 Rotating motor 47 Fixed jaw 49 Movable jaw 53 Clamp drive motor 59 Mold reversing device 61 Reversing device main body 63 Reversing drive motor 67 Punch mounting portion

Claims (7)

[Claims] 1. An automatic programming device for determining processing data, a bending processing order, a die to be used, and necessity of mold reversal based on product shape data, and a processing data, a bending processing order, and a use determined by the automatic programming device. A bending machine that performs bending processing based on mold information, and a plurality of dies are stored and retrieved in a mold storage shelf in a searchable manner, and a desired mold is placed from the mold storage shelf into a mold mounting portion of the bending machine. A die changing device for mounting and reversing the die based on the information on the necessity of reversing the die determined by the automatic programming device, and for each bending process in the processing order determined by the automatic programming device. An address in the mold storage shelf is searched based on the information on the used mold data and the number data selected by the user, and the mold at this address is sent to the mold changing apparatus. A bending process wherein the die is inverted based on the necessity information of the die reversal and mounted on a die mounting portion of a bending machine. 2. A desired die used based on product shape data from a die composed of a plurality of punches and dies stored at predetermined addresses in a die storage shelf provided on the back or front surface of a table of a bending machine. Punches and dies are automatically selected and taken out by an automatic programming device, and punches and dies are inverted based on mold reversal necessity information.
A die changing method, wherein a die is automatically mounted on a die mounting portion of a bending machine. 3. A mold storage shelf for storing a mold comprising a plurality of punches and dies on a back or front surface of a table of a bending machine at a predetermined address so as to be able to be stored and taken out, and product shape data for inputting product shape data. Input means;
A used mold determining means for determining a die to be used based on the product shape data input by the product shape data input means and determining whether or not the mold inversion is required; and a metal mold determined by the used mold determining means. A mold search means for searching for the address in which the mold is stored; and a clamp device for detachably attaching the mold searched by the mold search means, and attaching the clamped mold to a mold of a bending machine. A mold transfer device for positioning and conveying the position of the mold to be mounted on a part. 4. The clamp device is rotatable about a horizontal axis so as to convert the clamped punch into a stored state in which the punch is stored in the mold storage shelf and a machine mounted state in which the punch is mounted on a mold mounting portion of a bending machine. The die changing device according to claim 3, wherein the die changing device is provided. 5. The mold exchanging device according to claim 4, further comprising a mold reversing device for detachably mounting a punch from said clamping device and for reversing the punch. 6. The mold exchanging apparatus according to claim 5, wherein said mold reversing device is rotatable around a vertical axis to invert the front and back of the punch. 7. The table reversing device according to claim 5, wherein the mold reversing device is provided on a back surface or a front surface of the table.
The mold changing device as described in the above.