JP2021098207A - Female die, metal die, bending device, and bending method - Google Patents

Abstract

To provide a female die which eliminates a need for an individual die, can form a desired complicated shape, such as a three dimensional curve surface, by using a versatile and inexpensive processing device, and achieves a small number of limitations on sizes of workpieces, and to provide a die, a bending device, and a bending method.SOLUTION: A female die 3 is an elongated female die 3 which supports a workpiece W when bending of the workpiece W is performed in a state that the workpiece W is in contact with the female die 3 and a male die 4 at three points. The female die 3 includes a first support die 3A and a second support die 3B which are disposed spaced apart from each other in a Y axis direction. The first support die 3A has first split dies 31 arranged parallel to each other along an X axis direction, and the second support die 3B has second split dies 32 arranged parallel to each other along the X axis direction. Each first split die 31 and each second split die 32 are configured to be movable in a direction orthogonal to the Y axis direction and can change a distance D between the first split die 31 and the second split die 32 which face each other in the direction orthogonal to the Y axis direction.SELECTED DRAWING: Figure 1

Description

The present invention relates to a female mold, a mold, a bending apparatus, and a bending method.

Conventionally, as a processing method for forming a complicated curved surface such as a three-dimensional curved surface on a plate material such as a metal plate, bending processing using a sheet stretcher that winds the plate material around a mold while pulling the plate material, machining processing by machining, and a forming tool for the plate material. Craft foam processing and the like are known in which molding is performed by tapping and partially stretching. Further, a three-dimensional curved surface is formed on a plate material by using a multi-point pressing device in which a plurality of corresponding punches and dies are arranged in a matrix direction.

Further, when the plate material is bent, the plate material may be bent by using a press brake in which individual dies corresponding to the molding shape are installed.

However, the bending process using the above-mentioned sheet stretcher requires an expensive processing device and an individual mold corresponding to the forming shape, and the machining process by machining requires a lot of time for forming. A thick plate material was required, and the cost required for processing was high. Further, in the craft foam processing, there are many restrictions on the work size for forming, and in the bending process using the multi-point press device, the processing device is complicated and expensive.

In addition, molding by a press brake with individual dies installed is a relatively inexpensive configuration and is often used when two-dimensional bending is performed on a plate material, but it is difficult to mold a three-dimensional curved surface. It was.

Here, in a bending apparatus in which a die is installed in a press brake, it is possible to perform a three-point bending process in which the work is bent in a state where the work is in contact with the punch and die of the die at three points. is there.

As a bending device that performs three-point bending, as disclosed in Patent Document 1, the punch of a die installed in a press brake is divided into a plurality of divided dies arranged in the longitudinal direction, and the punch is divided in the pressing direction. It is known that the position of the mold can be adjusted. In the bending apparatus disclosed in Patent Document 1, when bending a plate material having a different thickness depending on the location, the position of the split mold is adjusted to a position according to the thickness of the plate material, so that the thickness of the plate material is different. Can be processed at the same time.

Japanese Unexamined Patent Publication No. 2018-114527

However, in the bending apparatus disclosed in Patent Document 1, the die facing the punch is an individual fixed mold corresponding to the molding shape, and it is necessary to replace each molding shape. In addition, it was difficult to form a desired three-dimensional curved surface.

Therefore, in the present invention, it is possible to form a desired complex shape such as a three-dimensional curved surface by using a highly versatile and inexpensive processing device without requiring an individual mold corresponding to the molding shape. , A female die, a die, a bending apparatus, and a bending method with less restrictions on the work size.

The female mold that solves the above problems is a long female mold that supports the work when the work is bent in a state where the work is in contact with the female mold and the male mold at three points. The first support type and the second support type are arranged at intervals in a direction orthogonal to the longitudinal direction of the female mold, and the first support type is a plurality of juxtaposed types along the longitudinal direction. The second split type has a first split type, the second support type has a plurality of second split types arranged side by side along the longitudinal direction, and the first split type and the second split type have the longitudinal length. It is configured to be movable in a direction orthogonal to the direction, and the distance between the first division type and the second division type facing the direction orthogonal to the longitudinal direction can be changed.

As a result, by changing the interval between the first division mold and the second division mold according to the shape of the three-dimensional curved surface to be formed on the work, the versatility of the press brake device and the like can be obtained without using individual dies. It is possible to form a desired complex shape such as a three-dimensional curved surface by using a high-priced and inexpensive processing device. In addition, restrictions on the work size when performing bending can be reduced.

Further, in the bending method for solving the above problem, the work supported by the long female mold is pressed by the long male mold, so that the female mold and the male mold are in contact with each other at three points. A bending method for bending a work, wherein the female mold includes a first support mold and a second support mold that are arranged at intervals in a direction orthogonal to the longitudinal direction of the female mold. The first support type has a plurality of first split types arranged side by side along the longitudinal direction, and the second support type has a plurality of second split types arranged side by side along the longitudinal direction. Each of the first division type and the second division type is configured to be movable in a direction orthogonal to the longitudinal direction, and is opposed to the first division type in a direction orthogonal to the longitudinal direction. The distance from the second split mold can be changed, and the male mold is arranged so as to face the female mold along the longitudinal direction of the female mold, and a plurality of male molds are arranged side by side along the longitudinal direction. The male-side split type has an adjustable position in the direction of proximity separation from the female mold, and by moving the male mold in a direction close to the female mold. , At least one male side split type can press the work supported by the first split type and the second split type, and the first split type and the first split type facing in a direction orthogonal to the longitudinal direction. The distance from the second split mold is adjusted according to the shape of the bending process for the work, and the position of the male side split mold with respect to the female mold is adjusted to the distance between the first split mold and the second split mold. A processing step of pressing the work supported by the first split mold and the second split mold by at least one male side split mold in a state adjusted according to the above, and the work is orthogonal to the longitudinal direction. The feeding process of feeding in the direction is repeated.

As a result, the first split die, the second split die, and the male side split die are adjusted to a plurality of position patterns to bend the workpiece, so that the press brake device or the like can be used without using individual dies. A complex shape such as a three-dimensional curved surface can be formed on the work W by using a highly versatile and inexpensive processing device.

According to the present invention, it is possible to form a desired complex shape such as a three-dimensional curved surface by using a highly versatile and inexpensive processing device such as a press brake device without using an individual die. In addition, restrictions on the work size when performing bending can be reduced.

It is a perspective view which shows the bending processing apparatus. It is a front sectional view which shows a part of a bending processing apparatus. It is a side sectional view which shows the bending processing apparatus. It is a top view which shows a part of the female mold in a bending apparatus. It is a side sectional view which shows the state that the work which supported the 1st division type and the 2nd division type is pressed by the male side division type, and the work is bent. It is a figure which shows the example of the 1st position pattern of the 1st division type, the 2nd division type, and the male side division type. It is a figure which shows the 2nd position pattern example of the 1st division type, the 2nd division type, and the male side division type. It is a figure which shows the 3rd position pattern example of a 1st division type, a 2nd division type, and a male side division type. It is a figure which shows the example of the 4th position pattern of the 1st division type, the 2nd division type, and the male side division type. It is a figure which shows the position pattern of the 1st division type, the 2nd division type, and the male side division type in the bending method. It is a figure which shows the flow of the 1st example of the processing procedure in the bending processing method. It is a figure which shows the processing procedure which concerns on 1st example in the bending processing method, and is the figure which shows the processing procedure with respect to the work in the 1st feed position. It is a figure which shows the processing procedure which concerns on the 1st example in the bending processing method, and is the figure which shows the processing procedure with respect to the work in the 2nd feed position. It is a figure which shows the flow of the 2nd example of the processing procedure in the bending processing method. It is a figure which shows the processing procedure which concerns on the 2nd example in the bending processing method, and is the figure which shows the processing procedure at the time of performing bending processing in the 1st pattern. It is a figure which shows the processing procedure which concerns on the 2nd example in the bending processing method, and is the figure which shows the processing procedure at the time of performing bending processing in the 2nd pattern. It is a side sectional view which shows the 1st modification of a bending apparatus. It is a side sectional view which shows the 2nd modification of a bending apparatus.

Next, a mode for carrying out the present invention will be described with reference to the accompanying drawings.

[Overall configuration of bending equipment]
The bending device 1 shown in FIG. 1 is an embodiment of a bending device including a mold having a female mold according to the present invention, and is configured so that the bending method according to the present invention can be carried out.

As shown in FIGS. 1 to 4, the bending apparatus 1 includes a mold 2 having a female mold 3 and a male mold 4, and the work W is brought into contact with the female mold 3 and the male mold 4 at three points. It is possible to bend the work W in this state. The bending apparatus 1 can form a complicated shape such as a three-dimensional curved surface on the work W by bending the work W.

The bending apparatus 1 repeatedly performs a step of feeding the work W and a step of pressing the male mold 4 extending in the direction orthogonal to the feeding direction of the work W against the work W supported by the female mold 3 to repeatedly carry out the work. It is possible to bend W. The bending device 1 may be configured such that a mold 2 is installed in a press brake device, for example.

In the following description, the direction in which the male mold 4 extends is defined as the X-axis direction, the feed direction of the work W orthogonal to the X-axis direction is defined as the Y-axis direction, and the vertical direction orthogonal to the X-axis direction and the Y-axis direction is defined. The direction is defined as the Z-axis direction.

The work W is a metal plate material such as an aluminum alloy and steel, and is bent by the bending apparatus 1 to form a complicated shape such as a three-dimensional curved surface. The work W that has been bent by the bending apparatus 1 is used, for example, as a leading structure outer plate of a railway vehicle. As the work W, not only a metal member but also a resin member or the like can be used as long as it is a member that can be bent.

The bending apparatus 1 includes a base 11, a fixed frame 12, a rod 13, a movable frame 14, and a hydraulic cylinder 15.

The base 11 is a long plate-shaped member arranged in the lower part of the bending apparatus 1 and supports the female mold 3. The base 11 is arranged so that the longitudinal direction is the X-axis direction. The fixed frame 12 is a long member arranged along the longitudinal direction of the base 11, and is arranged above the base 11.

The rod 13 is arranged along the Z-axis direction and connects the base 11 and the fixed frame 12. The rods 13 are arranged at both ends of the fixed frame 12 in the longitudinal direction. In the present embodiment, two rods 13 are provided at both ends of the fixed frame 12.

The movable frame 14 is a long member arranged along the longitudinal direction of the base 11, and is arranged between the base 11 and the fixed frame 12 in the vertical direction. The movable frame 14 is slidably supported by rods 13 at both ends in the longitudinal direction.

A plurality of hydraulic cylinders 15 are provided between the movable frame 14 and the fixed frame 12. The hydraulic cylinder 15 is configured to be expandable and contractible, and the movable frame 14 is moved in the Z-axis direction by the expansion and contraction operation of the hydraulic cylinder 15.

[Female type]
The female mold 3 is a long member arranged along the longitudinal direction of the base 11, and is supported from below by the base 11. The female mold 3 includes a first support mold 3A and a second support mold 3B that are arranged at intervals in the Y-axis direction, which is a direction orthogonal to the longitudinal direction of the female mold 3. The first support type 3A and the second support type 3B support the work W when the bending apparatus 1 bends the work W.

The first support type 3A has a plurality of first split types 31 arranged side by side along the X direction, which is the longitudinal direction of the female type 3. The second support type 3B has a plurality of second split types 32 arranged side by side along the X direction, which is the longitudinal direction of the female type 3. The first division type 31 and the second division type 32 are configured to be movable in the Y-axis direction, and the distance D between the first division type 31 and the second division type 32 facing in the Y-axis direction can be changed. It has become.

The female mold 3 includes a shaft 33 arranged along the Y-axis direction. The shaft 33 is rotatably supported by the base 11. The first split type 31 has a screw hole 31a, and the second split type 32 has a screw hole 32a. The shaft 33 has a first screw portion 33a that is fitted into the screw hole 31a of the first split type 31 by a screw action, and a second screw portion 33b that is fitted into the screw hole 32a of the second split type 32 by a screw action. Have.

Since the screw hole 31a of the first split type 31 and the first screw portion 33a are fitted by the screw action, and the screw hole 32a and the second screw portion 33b of the second split type 32 are fitted by the screw action, the shaft By rotating 33, both the first split type 31 and the second split type 32 can move along the Y-axis direction.

The first screw portion 33a and the second screw portion 33b have opposite screw forming directions, and when the shaft 33 rotates, the first split mold 31 and the second split mold 32 are close to each other. It is configured to move in a direction or in a direction away from each other.

For example, when the shaft 33 rotates to one side, the first division type 31 and the second division type 32 are close to each other, and when the shaft 33 rotates to the other side, the first division type 31 and the second division type 32 Can be configured to be separated from each other.

In this way, in the female mold 3, by rotating the shaft 33, both the first split mold 31 and the second split mold 32 can be moved in a direction in which they are close to each other and separated from each other. It is possible to simplify the operation of changing the interval D between the split type 31 and the second split type 32.

The first division type 31 and the second division type 32 facing each other in the Y-axis direction are arranged at positions symmetrical with respect to a straight line C passing through the center of the female type 3 in the Y-axis direction. That is, the first division type 31 and the second division type 32 are arranged at positions separated from the straight line C by an equal distance in the Y-axis direction.

The first division type 31 and the second division type 32 are formed in a rectangular shape in a plan view. Further, the upper surface of the central end portion of the first split type 31 and the second split type 32 in the Y-axis direction is formed in a curved shape that descends toward the center side.

[Male type]
The male mold 4 is a long member arranged along the X direction, which is the longitudinal direction of the female mold 3, and is arranged above the female mold 3 so as to face the female mold 3. The male type 4 is supported from above by the movable frame 14, and can move integrally with the movable frame 14 in the Z-axis direction.

The male mold 4 has a plurality of male side split molds 41 arranged side by side along the X-axis direction. The male side split type 41 is configured to be movable in the Z-axis direction with respect to the movable frame 14, and the position in the Z-axis direction, which is a direction in which the male type is close and separated from the female type 3, can be adjusted. The male type 4 has a screw shaft 53 that projects downward from the lower end of the movable frame 14. The male side split type 41 has a screw hole 41a into which the screw shaft 53 is fitted by a screw action. The screw shaft 53 is rotatably configured, and by rotating the screw shaft 53 fitted in the screw hole 41a, the position in the direction of being close to and separated from the female mold 3 of the male side split mold 41 is adjusted. Is possible.

Then, by moving the male mold 4 in the direction closer to the female mold 3 while adjusting the position in the direction of proximity separation from the female mold 3 of the male side split mold 41, the first split mold 31 and the first The work W supported by the two-divided mold 32 can be pressed by at least one male-side split mold 41.

The male side split type 41 is arranged in the center of the female type 3 in the Y-axis direction. That is, the male side split type 41 is arranged on a straight line C passing through the center of the female type 3 in the Y-axis direction. Then, in the Y-axis direction, the first division type 31 and the second division type 32 facing each other are located at positions symmetrical with respect to the male side division type 41.

The male side split type 41 is formed in a rectangular shape in a plan view. Further, the lower surface of the male side split type 41 is formed in a curved shape in which the central portion in the Y-axis direction protrudes downward from both end portions.

[Female and male drive mechanisms]
As shown in FIGS. 3 and 4, an electric motor 51 is attached to one end of the shaft 33 in the Y-axis direction. The electric motor 51 can rotationally drive the shaft 33, and by rotationally driving the shaft 33 by the electric motor 51, the first split type 31 and the second split type 32 can be moved in a direction in which they are close to each other and separated from each other. It is possible. The electric motor 51 is an example of a first drive unit that moves the first split type 31 and the second split type 32.

As shown in FIGS. 2 and 3, the electric motor 52 is housed inside the movable frame 14. The electric motor 52 is connected to the screw shaft 53, and the screw shaft 53 is rotationally driven by the electric motor 52. Since the screw shaft 53 is fitted into the screw hole 41a of the male side split type 41 by a screw action, the position of the male side split type 41 in the Z-axis direction is determined by rotationally driving the screw shaft 53 by the electric motor 52. It is possible to adjust.

For example, when the screw shaft 53 is rotated to one side by the electric motor 52, the male side split type 41 is lowered, and when the screw shaft 53 is rotated to the other side by the electric motor 52, the male side split type 41 is raised. Can be configured to: The electric motor 52 is an example of a second drive unit that adjusts the position of the male side split type 41 in the Z-axis direction.

As shown in FIG. 2, the bending device 1 includes a control device 55, and the electric motor 51 and the electric motor 52 are connected to the control device 55. The control device 55 is configured to be able to control the operations of the electric motor 51 that constitutes the first drive unit and the electric motor 52 that constitutes the second drive unit.

In this way, the bending apparatus 1 adjusts the positions of the first drive unit that moves the first division type 31 and the second division type 32 in the direction of being close to each other with respect to the female type 3 of the male side division type 41. A second drive unit and a control device 55 for controlling the first drive unit 31 and the second drive unit 32 are provided. As a result, the operation of changing the distance D between the first division type 31 and the second division type 32 and the operation of adjusting the position in the direction of proximity separation from the female type 3 of the male side division type 41 are automated. It is possible to easily and highly accurately form a three-dimensional curved surface or the like on the work W.

In the present embodiment, the shaft 33 is rotationally driven by the electric motor 51, but the shaft 33 can also be manually rotated. Further, in the present embodiment, the screw shaft 53 is configured to be rotationally driven by the electric motor 52, but the screw shaft 53 can also be configured to be manually rotated.

[Split type position adjustment]
In the bending apparatus 1 configured in this way, the shaft 33 is rotated to move the first division type 31 and the second division type 32 in the Y-axis direction, so that the first division type 31 and the second division type 31 facing each other are moved. The distance D from the 2-split type 32 can be adjusted to an arbitrary size within an adjustable range.

For example, the first division type 31-A and the second division type 32-A shown in FIG. 4 are the first division type 31 and the second division type 32 adjusted so that the interval D is the largest. Further, the first division type 31-B and the second division type 32-B are the first division type 31 and the second division type 32 adjusted so that the interval D is the smallest. Further, in the first division type 31-C and the second division type 32-C, the intervals D are the first division type 31-A and the second division type 32-A, the first division type 31-B and the second division type. The first division type 31 and the second division type 32 are adjusted so as to have a size between 32 and B. In FIG. 4, the distance D between the first division type 31-B and the second division type 32-B is 0, that is, the first division type 31-B and the second division type 32-B. Is adjusted to abut.

The size of the distance D between the first split mold 31 and the second split mold 32 can be appropriately set according to the shape and size of the curved surface shape to be molded, the plate thickness of the work W, and the like. For example, when forming a large curved surface shape, the distance D between the first division mold 31 and the second division mold 32 can be set large. Further, when bending the work W having a small plate thickness, for example, the distance D between the first division mold 31 and the second division mold 32 can be set small.

The size of the distance D between the first split mold 31 and the second split mold 32 can be adjusted in the range of 0 mm to 280 mm, for example, when bending an aluminum alloy having a thickness of 3 mm to 6 mm. Can be configured. In this case, the length of the first split type 31 and the second split type 32 in the X-axis direction can be set to, for example, 50.8 mm.

Further, in the bending apparatus 1, the male side split die 41 is moved in the Z-axis direction with respect to the movable frame 14 by rotating the screw shaft 53, so that the male side split die 41 is separated from the female die 3 of the male side split die 41. It is possible to adjust the position in the direction of the screw.

For example, the male-side split type 41-A shown in FIG. 2 is a male-side split type 41 adjusted to a position near the female mold 3 in the Z-axis direction, and the male-side split type 41-B is a male-side split type 41-B adjusted to a position near the female mold 3 in the Z-axis direction. It is a male side split type 41 adjusted to a position farther from the female type 3 than the male side split type 41-A.

When the position of the male-side split die 41 in the Z-axis direction is adjusted to a position near the female die 3, the amount of pressure of the work W by the male-side split die 41 when bending the work W is increased. Further, when the position of the male side split die 41 in the Z-axis direction is adjusted to a position away from the female die 3, the pressing amount of the work W by the male side split die 41 when bending the work W is reduced. Or, the male side split type 41 is in a state where it does not come into contact with the work W.

The position of the male side split die 41 in the Z-axis direction depends on the shape and size of the curved surface shape to be molded, the plate thickness of the work W, the size of the distance D between the first split die 31 and the second split die 32, and the like. It can be set as appropriate.

Then, when the work W is bent by the bending apparatus 1, the distance D between the first split mold 31 and the second split mold 32 facing each other is adjusted to an appropriate size, and the male side split mold 41 is used. Adjust the position in the Z-axis direction to an appropriate position. After that, as shown in FIG. 5, by moving the male mold 4 in the direction close to the female mold 3 by the movable frame 14, the work W supported by the first split mold 31 and the second split mold 32 is at least The work W is bent by pressing with one male side split die 41.

In this case, the upper surface of the central end portion of the first split mold 31 and the second split mold 32 and the lower surface of the male side split mold 41 that come into contact with the work W during bending are formed in a curved shape. , It is possible to prevent the work W from being scratched when the work W is pressed by the male side split type 41.

Further, the first division type 31 and the second division type 32 facing each other in the Y-axis direction are arranged at positions symmetrical with respect to a straight line C passing through the center of the female type 3 in the Y-axis direction. Further, the male side division type 41 is arranged on the straight line C, and the first division type 31 and the second division type 32 facing each other in the Y-axis direction are located at positions symmetrical with respect to the male side division type 41. doing.

Therefore, when bending the work W supported by the first division type 31 and the second division type 32, the central portion of the first division type 31 and the second division type 32 in the Y-axis direction of the work W is formed. The located portion can be pressed by the male side split type 41. As a result, the work W located on the first split mold 31 side of the straight line C and the work W located on the second split mold 32 side of the straight line C can be formed into an even shape.

[Split position pattern]
As described above, the first division type 31 and the second division type 32 in which the interval D in the Y-axis direction can be changed, and the male side division type 41 in which the position in the Z-axis direction can be adjusted have the following position patterns. Can be adjusted to. Here, the position pattern of the first division type 31 and the second division type 32 is a combination of the positions of a plurality of first division type 31 and the second division type 32 arranged side by side in the X-axis direction in the Y-axis direction. Say. The position pattern of the male-side split type 41 refers to a combination of positions of a plurality of male-side split-type 41s arranged side by side in the X-axis direction in the Z-axis direction.

(Example of 1st position pattern)
For example, as shown in FIG. 6B, the first division type 31 (31-1 to 1-3-1-9) and the second division type 32 (32 to 1-32-9) are linear along the X-axis direction, respectively. It can be adjusted to the position pattern that becomes the shape. In this way, when the first division type 31 and the second division type 32 are adjusted to a position pattern having a linear shape along the X-axis direction, the distance D between the opposite first division type 31 and the second division type 32 is D. Is the same for all the first division type 31 and the second division type 32.

In this case, as in the position pattern shown by the solid line in FIG. 6B, the first division type 31 and the second division type 32 facing each other can be adjusted to a position pattern in which the distance D between them is small. .. Further, as shown in the position pattern shown by the alternate long and short dash line in FIG. 6B, the distance D between the first split type 31 and the second split type 32 facing each other is larger than that shown by the solid line. It can be adjusted to the position pattern. In this way, the first division type 31 and the second division type 32 are adjusted to have a linear shape, and the distance D between the first division type 31 and the second division type 32 facing each other is changed. It is possible to do.

As shown in FIG. 6A, when the first division type 31 and the second division type 32 are adjusted to have a linear shape, the male side division type 41 also has a linear shape along the X-axis direction. It can be adjusted to the position pattern.

In this case, when the first division type 31 and the second division type 32 are adjusted to a position pattern in which the interval D becomes smaller, the male side division type 41 is similar to the position pattern shown by the solid line in FIG. 6A. , Can be adjusted to a position away from the female mold 3. Further, when the first division type 31 and the second division type 32 are adjusted to a position pattern in which the interval D becomes large, the male side division type 41 is similar to the position pattern shown by the alternate long and short dash line in FIG. 6A. In addition, it can be adjusted to a position closer to the female mold 3 than in the case shown by the solid line.

(Example of second position pattern)
As shown in FIG. 7 (b), the first split type 31 (31-1 to 1-3-1-9) and the second split type 32 (32 to 1-32-9) are from one side in the X-axis direction to the other. It is possible to adjust the position pattern so that the female mold 3 has an inclined shape approaching a straight line C passing through the center in the Y-axis direction toward the side. In this case, the distance D between the first division type 31 and the second division type 32 facing each other is the distance D between the first division type 31-1 and the second division type 32-1 located at one end in the X-axis direction. Is the largest. Then, the distance D between the first division type 31 and the second division type 32 facing each other decreases from one end in the X-axis direction toward the other end, and the first division type located at the other end in the X-axis direction. The distance D between 31-9 and the second split type 32-9 is the smallest.

As shown in FIG. 7A, when the first division type 31 and the second division type 32 are adjusted to a position pattern having an inclined shape, the male side division type 41 (41-1 to 41-9) becomes It is possible to adjust the position pattern so that the shape becomes inclined away from the female mold 3 from one side in the X-axis direction toward the other side. In this case, as for the position of the male side split type 41 in the Z-axis direction, the male side split type 41-1 located at one end in the X-axis direction is the position closest to the female type 3. Then, as it moves from one end in the X-axis direction toward the other end, it moves away from the female mold 3, and the male side split mold 41-9 located at the other end in the X-axis direction is the position farthest from the female mold 3. It has become.

That is, in the second position pattern example, the male side split type 41 facing the first split type 31 and the second split type 32 having a large interval D is located closer to the female type 3 in the X-axis direction. The male side split type 41 facing the first split type 31 and the second split type 32 having a small interval D is located farther from the female mold 3.

For example, the male side split type 41-1 facing the first split type 31-1 and the second split type 32-1 at one end in the X-axis direction arranged with an interval D1 is the first in the X-axis direction. The first divided type 31-2 and the second divided type 34-2 located on the other end side of the divided type 31-1 and the second divided type 32-1 and arranged with an interval D2 smaller than the interval D1. It is arranged closer to the female type 3 than the male side split type 41-2 facing the female type 3. Here, the interval D1 is an example of the first interval, and the interval D2 is an example of the second interval.

(Example of 3rd position pattern)
As shown in FIG. 8 (b), the first division type 31 (31-1 to 1-3-1-9) and the second division type 32 (32 to 1-32-9) have Y at both ends in the X-axis direction, respectively. It can be adjusted to a V-shaped position pattern that is located near the straight line C in the axial direction and is separated from the straight line C from both ends in the X-axis direction toward the center. In this case, the distance D between the first division type 31 and the second division type 32 facing each other is the first division type 31-1 and the second division type 32-1 located on one side in the X-axis direction, and X. The first split type 31-9 and the second split type 32-9 located at the other end in the axial direction are the smallest. Then, the distance D between the first division type 31 and the second division type 32 facing each other increases from one side portion and the other end portion in the X-axis direction toward the center portion, and is located at the center portion in the X-axis direction. The distance D between the first division type 31-5 and the second division type 32-5 is the largest.

As shown in FIG. 8B, when the first division type 31 and the second division type 32 are set to position patterns having a V shape, respectively, the first division type 31 and the second division type 32 Has a position pattern in which the female mold 3 as a whole has an elliptical shape.

As shown in FIG. 8A, when the first division type 31 and the second division type 32 are adjusted to have a V-shaped position pattern, the male side division type 41 is centered from both ends in the X-axis direction. It can be adjusted to an arc-shaped position pattern that is convex downward so as to approach the female mold 3 toward the portion. In this case, the position of the male side split type 41 in the Z-axis direction is such that the male side split types 41-1 and 41-9 located at both ends in the X-axis direction are farthest from the female type 3. Then, the female mold 3 is approached from both ends in the X-axis direction toward the central portion, and the male side split mold 41-5 located in the central portion in the X-axis direction is the position closest to the female mold 3. ..

That is, in the third position pattern example, the male side split type 41 facing the first split type 31 and the second split type 32 having a large interval D is located closer to the female type 3 in the X-axis direction. The male side split type 41 facing the first split type 31 and the second split type 32 having a small interval D is located farther from the female mold 3.

For example, the male side split type 41-5 facing the first split type 31-5 and the second split type 32-5 in the central portion in the X-axis direction arranged with an interval D3 is the first in the X-axis direction. The first division type 31-4, 31-6 and the second division type 32 are located on both sides of the division type 31-5 and the second division type 32-5 and are arranged with an interval D4 smaller than the interval D3. It is arranged closer to the female type 3 than the male side split type 41-4, 41-6 facing -4, 31-6. Here, the interval D3 is an example of the first interval, and the interval D4 is an example of the second interval.

(Example of 4th position pattern)
As shown in FIG. 9 (b), the first split type 31 (31-13 to 1-9) and the second split type 32 (32 to 1-32-9) are located at one end in the X-axis direction, respectively. 1st division type 31-1 and 2nd division type 32-1, 1st division type 31-9 and 2nd division type 32-9 located at the other end, and 1st division type 31 located at the center. -5 and the second split type 32-5 are located closest to the straight line C in the Y-axis direction. The first division type 31-1, 31-5, 31-9 and the second division type 32-1, 32-5, 32-9 have an interval D7.

Further, in the X-axis direction, the first divided type 31-1 and the second divided type 32-1 are adjacent to each other on the other side, the first divided type 31-2 and the second divided type 32-2, and the first divided type 31-. On both sides of the first split type 31-8 and the second split type 32-8, and the first split type 31-5 and the second split type 32-5 adjacent to one side of the 9 and the second split type 32-9. The adjacent first division type 31-4, 31-6 and the second division type 32-4, 32-6 are the first division type 31-1, 31-5, 31-9 and the second division in the Y-axis direction. It is arranged at a position farther from the straight line C than the molds 32-1, 32-5, and 32-9. The first division type 31-2, 31-4, 31-6, 31-8 and the second division type 32-2, 32-4, 32-6, 32-8 have an interval D6.

Further, the first division type 31-3 and the second division located between the first division type 31-2 and the second division type 32-2 and the first division type 31-4 and the second division type 32-4. Type 32-3, and 1st division type 31-7 located between the 1st division type 31-6 and the 2nd division type 32-6 and the 1st division type 31-8 and the 2nd division type 32-8. And the second division type 32-7 is the first division type 31-2, 31-4, 31-6, 31-8 and the second division type 32-2, 32-4, 32-6 in the Y-axis direction. It is arranged at a position farther from the straight line C than 32-8. The first division type 31-3, 31-7 and the second division type 32-3, 32-7 have an interval D5.

That is, in the fourth position pattern example, the first division type 31 and the second division type 32 are the first division type 31-1, 31-5, 31-9 and the second division type 32-1, 32-, respectively. W-shaped, with 5, 32-9 located closest to the straight line C, with the first split types 31-3, 31-7 and the second split types 32-3, 32-7 located closest to the straight line C. It is adjusted to the position pattern that becomes the shape.

Then, in the first division type 31 and the second division type 32, the opening surrounded by the first division type 31-1 to 31-5 and the second division type 32-1 to 2-32-5, and the first division An opening surrounded by molds 31-5 to 31-9 and a second split mold 32-5 to 32-9 is formed.

As shown in FIG. 9A, when the first division type 31 and the second division type 32 are adjusted to a position pattern having a W shape, the male side division type 41 is the first division type 31 and the second division type 31. The male side split mold 41 facing the opening formed by the split mold 32 can be adjusted to a position pattern arranged closer to the female mold 3 than the other male side split mold 41.

In FIG. 9A, the male side split type 41-3 facing the first split type 31-3 and the second split type 32-3 arranged with the gap D5, and the gap D5 are provided. The first division type 31 to be arranged and the male side division type 41-7 facing the second division type 32-7 are arranged with an interval D6 smaller than the interval D5. -2, 31-4, 31-6, 31-8 and male side split type 41-2, 41-4, 41 facing the second split type 32-2, 32-4, 32-6, 32-8 -6, 41-8, and first split types 31-1, 31-5, 31-9 and second split types 32-1, 32-5, arranged with a spacing D7 smaller than the spacing D5, It is arranged closer to the female type 3 than the male side split types 41-1, 41-5, 41-9 facing 32-9. Here, the interval D5 is an example of the first interval, and the intervals D6 and D7 are examples of the second interval.

In this way, the female mold 3 constituting the mold 2 is configured so that the distance D between the first split mold 31 and the second split mold 32 facing each other can be changed, and the first split mold 31 and the second split mold 32 can be changed. 32 can be adjusted to various position patterns. Therefore, by changing the distance D between the first split die 31 and the second split die 32 according to the shape of the three-dimensional curved surface or the like formed on the work W, the press brake device or the like can be used without using individual dies. It is possible to form a desired complex shape such as a three-dimensional curved surface by using a highly versatile and inexpensive processing device. Further, since the first support type 3A and the second support type 3B of the female type 3 have a plurality of first division type 31 and second division type 32 which are arranged side by side in the longitudinal direction, respectively, they are bent. There are less restrictions on the work size when processing, and it is possible to perform bending processing on a large work W.

Further, in the female mold 3, since the distance D between the first split mold 31 and the second split mold 32 can be adjusted according to the molding shape and size of the work W to be bent, the work W after molding can be adjusted. The trim allowance can be reduced, and the material cost can be reduced. Further, in the female mold 3, since the work W made of the plate material can be bent, the material is not wasted as compared with the case where the work W is machined, for example, and the material cost is reduced. can do.

Further, in the female mold 3, since the first split mold 31 and the second split mold 32 can be bent with respect to the plurality of workpieces W in a state of being adjusted to the same position pattern, the plurality of workpieces W can be bent. On the other hand, it is possible to perform bending with high accuracy.

Further, the male mold 4 constituting the mold 2 is configured so that the position in the direction of being close to and separated from the female mold 3 can be adjusted, and in addition to the first split mold 31 and the second split mold 32, the male mold 2 is male. It is possible to adjust the side split type 41 to various position patterns. Therefore, the distance D between the first split mold 31 and the second split mold 32 is changed according to the shape of the three-dimensional curved surface or the like formed on the work W, and the distance of the male side split mold 41 with respect to the female mold 3 is adjusted. Therefore, it is possible to form a desired complex shape such as a three-dimensional curved surface by using a highly versatile and inexpensive processing device such as a press brake device without using an individual mold.

However, in the mold 2, even if the male mold 4 does not have a plurality of male side split molds 41 and the positions with respect to the female mold 3 are uniform in the longitudinal direction, the first split of the female mold 3 is performed. By changing the distance D between the mold 31 and the second split mold 32, it is possible to form a complicated shape such as a three-dimensional curved surface.

Further, in the above-mentioned second position pattern example to fourth position pattern example, the first division type 31 and the second division type 32 which are arranged with the first interval (intervals D1, D3, D5) are opposed to each other. The male side split type 41 faces the first split type 31 and the second split type 32 which are arranged with a second interval (spacing D2, D4, D6, D7) smaller than the first interval. It is arranged closer to the female mold 3 than the mold 41.

Therefore, when the work W supported by the first split mold 31 and the second split mold 32 is pressed by the male side split mold 41 and the work W is bent, the work W is pressed by the male side split mold 41. The amount of pressing at the time of this can be set to the amount of pressing corresponding to the size of the interval D between the first division type 31 and the second division type 32. As a result, it is possible to suppress the occurrence of large bending locally in the work W, and it is possible to suppress the occurrence of wrinkles and cracks in the work W after molding.

However, as the position patterns of the first division type 31, the second division type 32, and the male side division type 41, the first division type 31 and the second division type 31 having a small interval D depending on the shape of the bending process formed on the work W. The male side split type 41 facing the split type 32 is a position pattern arranged closer to the female type 3 than the male side split type 41 facing the first split type 31 and the second split type 32 having a large interval D. It is also possible.

[Bending method]
Next, a bending method for bending the work W using the bending device 1 will be described.

In the bending method, the distance D between the first division type 31 and the second division type 32 facing in the Y-axis direction is adjusted according to the shape of the bending processing with respect to the work W, and the female type 3 of the male side division type 41. With respect to the position adjusted according to the distance D between the first division type 31 and the second division type 32, the work W supported by the first division type 31 and the second division type 32 is placed on at least one male side. It has a processing step of pressing by the split mold 41 and a feed process of feeding the work W in the Y-axis direction, and the work W is bent by repeatedly performing the processing step and the feed process.

In this case, the adjustment of the interval D between the first division type 31 and the second division type 32 can be performed by controlling the operation of the electric motor 51 by the control device 55. Further, the position of the male side split type 41 with respect to the female type 3 can be adjusted by controlling the operation of the electric motor 52 by the control device 55. Further, the work W can be fed in the Y-axis direction by using a feed device controlled by the control device 55. The distance D between the first split type 31 and the second split type 32 is adjusted, the position of the male side split type 41 with respect to the female type 3 is adjusted, and the work W is manually fed in the Y-axis direction. Is also possible.

In the bending method of the present embodiment, the work W at the same feed position is pressed by the male side split die 41 a plurality of times in the processing step. The bending method in the present embodiment is that of the first split type 31 (31-13 to 1-9) and the second split type 32 (32-1 to 2-9) when pressing by the male side split type 41. It has four patterns as a position pattern and a position pattern of the male side split type 41 (41-1 to 41-9). Specifically, the first pattern P1 shown in FIG. 10 (a), the second pattern P2 shown in FIG. 10 (b), the second pattern P3 shown in FIG. 10 (c), and the fourth pattern shown in FIG. 10 (d). It has a pattern P4.

In the first pattern P1, the distance D between the first division type 31 and the second division type 32 is the distance between the first division type 31-4 to 31-6 and the second division type 32-4 to 32-6. D is the smallest. Further, the distance D between the first divided type 31-2, 31-8 and the second divided type 32-2, 32-8 is the largest. The distance D between the first division type 31-1, 31-3, 31-7, 31-9 and the second division type 32-1, 32-3, 32-7, 32-9 is the smallest distance D. It is the size between the largest interval D.

In the first pattern P1, the positions of the male side split type 41 in the Z-axis direction are such that the male side split types 41-2 and 41-8 are located near the female type 3 and the male side split type 41-1. , 41-3 to 41-7, 41-9 are located farther from the female type 3 than the male side split type 41-2, 41-8. That is, the male side split type 41-2, 41-8 facing the first split type 31-2, 31-8 and the second split type 32-2, 32-8 having the largest interval D is the other male. It protrudes closer to the female mold 3 than the side split mold 41.

In the first pattern P1, when the work W is pressed by the male mold 4, the male side split molds 41-2 and 41-8 come into contact with the work W supported by the first split mold 31 and the second split mold 32. However, the male side split type 41-1, 41-3 to 41-7, 41-9 do not come into contact with the work W. As a result, the portions where the male side split molds 41-2 and 41-8 of the work W come into contact with each other are bent.

In the second pattern P2, the distance D between the first division type 31 and the second division type 32 is the first division type 31-1, 31-5, 31-9 and the second division type 32-1, 32- The distance D between 5 and 32-9 is the smallest. Further, the distance D between the first divided type 31-3, 31-7 and the second divided type 32-3, 32-7 is the largest. The distance D between the first division type 31-2, 31-4, 31-6, 31-8 and the second division type 32-2, 32-4, 32-6, 32-8 is the smallest distance D. It is the size between the largest interval D.

In the second pattern P2, the male side split type 41 is located near the female type 3 with the male side split type 41-3 and 41-7 located near the female type 3, and the male side split type 41-1 is positioned in the Z-axis direction. , 41-2, 41-4 to 41-6, 41-8, 41-9 are located farther from the female type 3 than the male side split type 41-3, 41-7. That is, the male side split type 41-3, 41-7 facing the first split type 31-3, 31-7 and the second split type 32-3, 32-7 having the largest interval D is the other male. It protrudes closer to the female mold 3 than the side split mold 41.

In the second pattern P2, when the work W is pressed by the male mold 4, the male side split molds 41-3 and 41-7 come into contact with the work W supported by the first split mold 31 and the second split mold 32. However, the male side split type 41-1, 41-2, 41-4 to 41-6, 41-8, 41-9 do not come into contact with the work W. As a result, the portions where the male side split molds 41-3 and 41-7 of the work W come into contact with each other are bent.

In the third pattern P3, the distance D between the first division type 31 and the second division type 32 is the first division type 31-1, 31-2, 31-8, 31-9 and the second division type 32- The distance D between 1, 32-2, 32-8, and 32-9 is the smallest. Further, the distance D between the first divided type 31-4, 31-6 and the second divided type 32-4, 32-6 is the largest. The distance D between the first division type 31-3, 31-5, 31-7 and the second division type 32-3, 32-5, 32-7 is between the smallest distance D and the largest distance D. It is the size.

In the third pattern P3, the positions of the male side split type 41 in the Z-axis direction are such that the male side split types 41-4 and 41-6 are located near the female type 3 and the male side split type 41-1. ~ 41-3, 41-5, 41-7 to 41-9 are located farther from the female type 3 than the male side split type 41-4, 41-6. That is, the male side split type 41-4, 41-6 facing the first split type 31-4, 31-6 and the second split type 32-4, 32-6 having the largest interval D is the other male. It protrudes closer to the female mold 3 than the side split mold 41.

In the third pattern P3, when the work W is pressed by the male mold 4, the male side split molds 41-4 and 41-6 come into contact with the work W supported by the first split mold 31 and the second split mold 32. However, the male side split type 41-1 to 41-3, 41-5, 41-7 to 41-9 do not come into contact with the work W. As a result, the portions where the male side split molds 41-4 and 41-6 of the work W come into contact with each other are bent.

In the fourth pattern P4, the distance D between the first division type 31 and the second division type 32 is the first division type 31-13 to 1-3, 31-7 to 31-9, and the second division type 32-. The interval D between 1-32-3 and 32-7 to 32-9 is the smallest. Further, the interval D between the first division type 31-5 and the second division type 32-5 is the largest. The distance D between the first division type 31-4, 31-6 and the second division type 32-4, 32-6 is the size between the smallest distance D and the largest distance D.

In the fourth pattern P4, the position of the male side split type 41 in the Z-axis direction is such that the male side split type 41-5 is located near the female type 3 and the male side split type 41-1 to 41-4. , 41-6 to 41-9 are located farther from the female type 3 than the male side split type 41-5. That is, the side where the male side split type 41-5 facing the first split type 31-5 and the second split type 32-5 having the largest interval D is closer to the female type 3 than the other male side split type 41. It protrudes into.

In the fourth pattern P4, when the work W is pressed by the male mold 4, the male side split type 41-5 comes into contact with the work W supported by the first split type 31 and the second split type 32, and the male side The split types 41-1 to 41-4 and 41-6 to 41-9 do not come into contact with the work W. As a result, the portion of the work W that comes into contact with the male side split die 41-5 is bent.

As described above, in the bending method, the distance between the first split mold 31 and the second split mold 32 facing each other is adjusted according to the shape of the bending work with respect to the work W, and the female mold 3 of the male side split mold 41 is used. By adjusting the position with respect to the above according to the distance D between the first division type 31 and the second division type 32, the first division type 31, the second division type 32, and the male side division type 41 can have a plurality of position patterns. Can be adjusted to. Then, by adjusting the first split die 31, the second split die 32, and the male side split die 41 to a plurality of position patterns and bending the work W, the press brake is performed without using individual dies. It is possible to form a complicated shape such as a three-dimensional curved surface on the work W by using a highly versatile and inexpensive processing device such as a device. Further, since the first support type 3A and the second support type 3B of the female type 3 have a plurality of first division type 31 and second division type 32 which are arranged side by side in the longitudinal direction, respectively, they are bent. It is possible to reduce the restrictions on the work size when processing.

In the bending method, for example, using the four position patterns of the first pattern P1 to the fourth pattern P4, the work W can be bent by the following processing procedure. However, when bending the work W, the processing is not limited to the first pattern P1 to the fourth pattern P4, and other position patterns may be used. Further, the number of position patterns to be used is not limited to four, and three or less position patterns may be used, or five or more position patterns may be used.

(First example of processing procedure)
In the bending method having the processing procedure according to the first example, as shown in FIG. 11, the work W is first set to the first feed position which is the first feed position when the bending process is performed (S101). Next, the first split type 31, the second split type 32, and the male side split type 41 are adjusted to the first pattern P1 (S102). After that, as shown in FIG. 12A, the work W supported by the first split type 31 and the second split type 32 is pressed by the male side split type 41 in a state adjusted to the first pattern P1. , The first processing step of bending the work W is carried out (S103). In this case, the portion where the male side split molds 41-2 and 41-8 of the work W are in contact (the portion shown by the solid line in FIG. 12A) is bent.

After performing the first processing step in step S103, the first split mold 31, the second split mold 32, and the male side split mold 41 are adjusted to the second pattern P2 (S104). After that, as shown in FIG. 12B, in a state adjusted to the second pattern P2, the work W at the first feed position is pressed by the male side split die 41 to bend the work W. 2 The processing step is carried out (S105). In this case, the portion (the portion shown by the solid line in FIG. 12B) in contact with the male side split molds 41-3 and 41-7 of the work W is bent. In FIG. 12, the region surrounded by the alternate long and short dash line of the work W and shaded indicates a region that has already been bent.

After performing the first processing step in step S105, the first split mold 31, the second split mold 32, and the male side split mold 41 are adjusted to the third pattern P3 (S106). After that, as shown in FIG. 12 (c), in a state adjusted to the third pattern P3, the work W at the first feed position is pressed by the male side split die 41 to bend the work W. 3 The processing step is carried out (S107). In this case, the portion where the male side split molds 41-4 and 41-6 of the work W are in contact (the portion shown by the solid line in FIG. 12C) is bent.

After performing the first processing step in step S107, the first split mold 31, the second split mold 32, and the male side split mold 41 are adjusted to the fourth pattern P4 (S108). After that, as shown in FIG. 12D, in a state adjusted to the fourth pattern P4, the work W at the first feed position is pressed by the male side split die 41 to bend the work W. 4 Perform the processing step (S109). In this case, the portion of the work W in contact with the male side split die 41-5 (the portion shown by the solid line in FIG. 12 (d)) is bent.

After that, it is determined whether or not the feed position of the current work W is the last feed position when bending is performed (S110). Here, the final feed position of the work W means a position set when the work W is finally bent. When it is determined in step S110 that the feed position of the work W is not the last feed position, a feed step of feeding the work W to the next feed position in the Y-axis direction is performed (S111). By carrying out the feed step in step S111, the work W is fed from the first feed position to the second feed position which is the next feed position.

As shown in FIG. 13A, after the work W is fed to the second feed position, steps S102 and S103 are performed to bend the work W at the second feed position in the first pattern P1. Apply processing. Further, as shown in FIG. 13B, step S104 and step S105 are carried out to bend the work W at the second feed position in the second pattern P2. In FIG. 13, the region surrounded by the alternate long and short dash line of the work W and shaded indicates a region that has already been bent.

Further, as shown in FIG. 13C, after step S105, steps S106 and S107 are performed to bend the work W at the second feed position in the third pattern P3. Further, as shown in FIG. 14D, step S108 and step S109 are performed to bend the work W at the second feed position in the fourth pattern P4.

After performing step S109, step S110 is carried out. When it is determined in step S110 that the feed position of the work W is not the last feed position, then step S111 and steps S102 to S110 are repeated until it is determined in step S110 that the feed position of the work W is the last feed position. carry out. If it is determined in step S110 that the feed position of the work W is the final feed position, the bending process is terminated.

In this example, the bending process is performed in the order of the first pattern P1 → the second pattern P2 → the third pattern P3 → the fourth pattern P4 at the same feed position, but the order of the position patterns is changed and the bending process is performed. It is also possible to do. Further, in this example, the order of the position patterns of the bending process performed at each feed position is the same, but it is also possible to perform the bending process by changing the order of the position patterns for each feed position.

As described above, in the bending method having the processing procedure according to the first example, when the work W supported by the first divided mold 31 and the second divided mold 32 is pressed by the male mold 4, at least one male side is used. The first split type 31 and the second split type so that the split type 41 (41-2, 41-8) comes into contact with the work W and the portion of the work W in contact with the male side split type 41 is bent. The first processing step (S103) in which the work W supported by the first split die 31 and the second split die 32 is pressed by the male split die 41 with the position of 32 and the position of the male split die 41 adjusted. ) And the work W supported by the first split mold 31 and the second split mold 32 by the male mold 4, at least the male side split mold 41 (41-3, 41-) different from the first processing step. The distance D between the first division type 31 and the second division type 32 and the male side division so that the 7) comes into contact with the work W and the portion of the work W in contact with the male side division type 41 is bent. In the second processing step (S105) in which the work W supported by the first split mold 31 and the second split mold 32 is pressed by the male side split mold 41 with the position of the mold 41 adjusted, and the work W is pressed on the Y axis. It is provided with a feed step of feeding in a direction, and a feed step (S111) is performed after performing a first processing step (S103) and a second processing step (S105), and then a first processing step (S103) and a second processing step (S103). It is configured to carry out the processing step (S105) again.

As a result, it is possible to efficiently perform the bending process on the work W by reducing the number of times the feed process is performed.

(Second example of processing procedure)
In the bending method having the processing procedure according to the second example, as shown in FIG. 14, the work W is first set to the first feed position which is the first feed position when the bending process is performed (S201). Next, the first split type 31, the second split type 32, and the male side split type 41 are adjusted to the first pattern P1 (S202). After that, as shown in FIG. 15A, the work W supported by the first split type 31 and the second split type 32 is pressed by the male side split type 41 in a state adjusted to the first pattern P1. , The first processing step of bending the work W is carried out (S203). In this case, the portion where the male side split molds 41-2 and 41-8 of the work W are in contact (the portion shown by the solid line in FIG. 15A) is bent.

After performing the first machining step in step S203, it is determined whether or not the feed position of the current work W is the last feed position when bending is performed (S204). When it is determined in step S204 that the feed position of the work W is not the last feed position, a feed step of feeding the work W to the next feed position in the Y-axis direction is performed (S205). By carrying out the feed step in step S205, the work W is fed from the first feed position to the second feed position which is the next feed position.

As shown in FIG. 15B, after the work W is fed to the second feed position, step S203 is performed to bend the work W at the second feed position in the first pattern P1. To do. After performing the first processing step in step S203, step S204 is carried out. When it is determined in step S204 that the feed position of the work W is not the final feed position, a feed step is performed (S205). By carrying out the feed step in step S205, the work W is fed from the second feed position to the third feed position, which is the next feed position. In FIG. 15, the shaded area surrounded by the alternate long and short dash line of the work W indicates a region that has already been bent.

As shown in FIG. 15C, after the work W is fed to the third feed position, step S203 is performed to bend the work W at the third feed position in the first pattern P1. To do. After performing the first processing step in step S203, step S204 is carried out. In this example, it is assumed that the third feed position is the last feed position of the work W. However, in the bending method, the feed position of the work W may be two feed positions, the first feed position and the second feed position, and the work W is bent at four or more feed positions. Further, it is also possible to bend the work W only at the first feed position.

Since the current feed position of the work W is the third feed position which is the last feed position, in step S204, it is determined that the feed position of the work W is the last feed position, and step S206 is performed. In step S206, a return step of returning the work W from the third feed position, which is the last feed position, to the first feed position, which is the first feed position, is performed. Here, the return direction of the work W is opposite to the feed direction of the work W in the Y-axis direction.

After performing the return step in step S206, the first split type 31, the second split type 32, and the male side split type 41 are adjusted to the second pattern P2 (S207). It is also possible to switch the order of execution of step S206 and step S207, and to execute step S206 after step S207.

Next, as shown in FIG. 16A, the work W returned to the first feed position in the return step of step S206 is adjusted to the second pattern P2 by the male side split type 41. A second processing step of bending the work W by pressing the work W at the first feed position is performed (S208). In this case, the portion where the male side split molds 41-3 and 41-7 of the work W are in contact (the portion shown by the solid line in FIG. 16A) is bent. In FIG. 16, the shaded area surrounded by the alternate long and short dash line of the work W indicates a region that has already been bent.

After performing the second machining step in step S208, it is determined whether or not the feed position of the current work W is the last feed position when bending is performed (S209). When it is determined in step S209 that the feed position of the work W is not the last feed position, a feed step is performed (S210) to feed the work W from the first feed position to the second feed position which is the next feed position. ..

As shown in FIG. 16B, after the work W is fed to the second feed position, step S208 is performed to bend the work W at the second feed position in the second pattern P2. To do. After performing the second processing step in step S208, step S209 is carried out. When it is determined in step S209 that the feed position of the work W is not the last feed position, a feed step is performed (S210) to feed the work W from the second feed position to the third feed position which is the next feed position. ..

As shown in FIG. 16C, after the work W is fed to the third feed position, step S208 is performed to bend the work W at the third feed position in the second pattern P2. To do. After performing the second processing step in step S208, step S209 is carried out.

Since the current feed position of the work W is the third feed position which is the last feed position, it is determined in step S209 that the feed position of the work W is the last feed position, and the return step is performed in step S211. The work W is returned from the third feed position to the first feed position.

After performing the return step in step S211, the first division type 31, the second division type 32, and the male side division type 41 are adjusted to the third pattern P3 (S212). It is also possible to switch the order of execution of step S211 and step S212, and to execute step S211 after step S212.

Next, with respect to the work W returned to the first feed position, the work W at the first feed position is pressed by the male side split type 41 in a state of being adjusted to the third pattern P3, and the work W is pressed. A third processing step of performing bending processing is carried out (S213). In this case, the portions of the work W in contact with the male side split molds 41-4 and 41-6 are bent.

After that, step S214, step S215, and step S213 are repeatedly carried out to bend the work W at the second feed position and the work W at the third feed position in the third pattern P3. After bending the work W at the third feed position in the third pattern P3, it is determined in step S214 that the feed position of the work W is the final feed position, and the return step is performed in step S216. Then, the work W is returned from the third feed position to the first feed position.

After performing the return step in step S216, the first split type 31, the second split type 32, and the male side split type 41 are adjusted to the fourth pattern P4 (S217). It is also possible to switch the order of execution of step S216 and step S217, and to execute step S216 after step S217.

Next, with respect to the work W returned to the first feed position, the work W at the first feed position is pressed by the male side split type 41 in a state of being adjusted to the fourth pattern P4, and the work W is pressed. A fourth processing step of performing bending processing is carried out (S218). In this case, the portion of the work W in contact with the male side split die 41-5 is bent.

After that, steps S219, S220, and S218 are repeatedly carried out to bend the work W at the second feed position and the work W at the third feed position in the fourth pattern P4. After bending the work W at the third feed position in the fourth pattern P4, it is determined in step S219 whether or not the feed position of the work W is the final feed position. Since the work W is in the third feed position, in step S219, it is determined that the feed position of the work W is the last feed position, and the bending process is completed.

In this example, the order of the position patterns when the bending process is performed while sandwiching the return step is the order of the first pattern P1 → the second pattern P2 → the third pattern P3 → the fourth pattern P4. However, it is also possible to change the order of the position patterns to perform the bending process.

As described above, in the bending method having the processing procedure according to the second example, when the work W supported by the first divided mold 31 and the second divided mold 32 is pressed by the male mold 4, at least one male side is used. The first split type 31 and the second split type are bent so that the split type 41 (41-2, 41-8) comes into contact with the work W and the portion of the work W in contact with the male side split type 41 is bent. The first processing step of pressing the work W supported by the first split mold 31 and the second split mold 32 by the male side split mold 41 while adjusting the distance D from the 32 and the position of the male side split mold 41. (S203) and when the work W supported by the first split mold 31 and the second split mold 32 is pressed by the male side split mold 41, at least the male side split mold 41 (41-) different from the first processing step is used. The distance D between the first split mold 31 and the second split mold 32 is such that the portion of the work W in contact with the male side split mold 41 is bent so that 3, 41-7) comes into contact with the work W. In the second processing step (S208) in which the work W supported by the first division mold 31 and the second division mold 32 is pressed by the male side division mold 41 with the positions of the male side division mold 41 adjusted, and the work. It includes a feed step (S205, S210) for sending W to one side in the Y-axis direction and a return step for returning the work W to the other side in the Y-axis direction, and includes a first machining step (S203) and a first machining step (S203). ) Is repeated a plurality of times, then the return step (S206) is carried out, and further, it is carried out after the second machining step (S208) and the second machining step (S208). The feeding step (S210) is configured to be repeated a plurality of times.

As a result, the number of position adjustments of the first split type 31, the second split type 32, and the male side split type 41 when bending the work W can be reduced.

[First modification]
As shown in FIG. 17, when bending the work W, the bending apparatus 1 is located between the first division type 31 and the second division type 32 and the work W, and the male side division type 41 and the work W. It is also possible to have a structure having a protective sheet 60 located between and. The protective sheet 60 is made of an elastic member such as rubber or resin.

In this way, the work W is bent with the protective sheet 60 interposed between the first split mold 31 and the second split mold 32 and the work W, and between the male side split mold 41 and the work W. By applying this, it is possible to prevent the work W from being scratched by direct contact with the first split type 31, the second split type 32, and the male side split type 41.

[Second modification]
As shown in FIG. 18, the bending apparatus 1 is arranged along the Y-axis direction and the first shaft 71 which is arranged along the Y-axis direction and is fitted into the screw hole 31a of the first division type 31 by a screw action. The second shaft 72 may be provided so as to be fitted into the screw hole 32a of the second split type 32 by a screw action.

The first shaft 71 has a screw portion 71a that is fitted with a screw hole 31a of the first division type 31 by a screw action, and the rotation of the first shaft 71 causes the first division type 31 to move along the Y-axis direction. It is possible to move. The second shaft 72 has a screw hole 32a of the second division type 32 and a screw portion 72a that is fitted by a screw action, and the second division type 32 is moved along the Y-axis direction by rotating the second shaft 72. It is possible to move.

In this example, the screw forming direction of the screw portion 71a on the first shaft 71 is opposite to the screw forming direction of the screw portion 72a on the second shaft 72. However, it is also possible to configure the screw forming direction of the screw portion 71a and the screw forming direction of the screw portion 72a to be the same direction.

An electric motor 51 capable of rotationally driving the first shaft 71 can be attached to the first shaft 71. An electric motor 51 capable of rotationally driving the second shaft 72 can be attached to the second shaft 72.

In this way, even in the case where the first shaft 71 and the second shaft 72 are provided, the first split type 31 and the second split type 32 are moved along the Y-axis direction to form the first split type 31. It is possible to change the interval D from the second division type 32.

1 Bending machine 2 Mold 3 Female mold 3A 1st support type 3B 2nd support type 4 Male type 31 1st division type 32 2nd division type 33 Shaft 33a 1st screw part 33b 2nd screw part 41 Male side division type 51 Electric motor 52 Electric motor 53 Screw shaft 55 Control device D (1st division type and 2nd division type) Interval D1, D3, D5 Interval (1st interval)
D2, D4, D6, D7 interval (second interval)
W work

Claims (10)

A long female mold that supports the work when bending the work in a state where the work is in contact with the female mold and the male mold at three points.
A first support type and a second support type that are arranged at intervals in a direction orthogonal to the longitudinal direction of the female type are provided.
The first support type has a plurality of first split types arranged side by side along the longitudinal direction.
The second support type has a plurality of second split types arranged side by side along the longitudinal direction.
The first division type and the second division type are configured to be movable in a direction orthogonal to the longitudinal direction, and the first division type and the second division type facing in a direction orthogonal to the longitudinal direction are used. Female type with variable spacing. The female mold according to claim 1, wherein the first split mold and the second split mold that face each other in a direction orthogonal to the longitudinal direction are arranged at positions symmetrical with respect to the center of the female mold. .. A shaft having a first screw portion that is arranged along a direction orthogonal to the longitudinal direction and is fitted to the first split mold by a screw action, and a second screw portion that is fitted to the second split mold by a screw action. With
The female mold according to claim 1 or 2, wherein the screw forming directions of the first screw portion and the second screw portion are opposite to each other. The female type according to any one of claims 1 to 3.
A long male mold arranged opposite to the female mold along the longitudinal direction of the female mold is provided.
The male mold has a plurality of male side split molds juxtaposed along the longitudinal direction.
The male side split type can adjust the position in the direction of being close to and separated from the female type.
By moving the male mold in a direction close to the female mold, at least one male side split mold can press the work supported by the first split mold and the second split mold. Type. The mold according to claim 4, wherein the first split mold and the second split mold facing each other in a direction orthogonal to the longitudinal direction are arranged at positions symmetrical with respect to the male side split mold. .. The mold according to claim 4 or 5,
The first drive unit that moves the first division type and the second division type, and
A second drive unit that adjusts the position in the direction of proximity and separation from the female mold of the male side split type, and
A bending apparatus including a control device for controlling the first drive unit and the second drive unit. A bending method in which a work supported by a long female mold is pressed by a long male mold to bend the work in a state of being in contact with the female mold and the male mold at three points. ,
The female mold includes a first support mold and a second support mold that are arranged at intervals in a direction orthogonal to the longitudinal direction of the female mold.
The first support type has a plurality of first split types arranged side by side along the longitudinal direction.
The second support type has a plurality of second split types arranged side by side along the longitudinal direction.
The first division type and the second division type are configured to be movable in a direction orthogonal to the longitudinal direction, and the first division type and the second division type facing in a direction orthogonal to the longitudinal direction. The interval with and can be changed,
The male mold has a plurality of male side split molds which are arranged along the longitudinal direction of the female mold so as to face the female mold and are arranged side by side along the longitudinal direction.
The male side split type can adjust the position in the direction of being close to and separated from the female type.
By moving the male mold in a direction close to the female mold, at least one male side split mold can press the work supported by the first split mold and the second split mold.
The distance between the first split mold and the second split mold facing in the direction orthogonal to the longitudinal direction is adjusted according to the shape of the bending process for the work, and the distance between the male side split mold and the female mold is adjusted. The work supported by the first division type and the second division type is divided into at least one male side in a state where the position is adjusted according to the distance between the first division type and the second division type. A bending method in which a processing step of pressing with a mold and a feeding process of feeding the work in a direction orthogonal to the longitudinal direction are repeatedly performed. When the work supported by the first division type and the second division type is pressed by the male mold, at least one male side division type comes into contact with the work, and the male side division in the work. With the distance between the first split mold and the second split mold and the position of the male side split mold adjusted so that the portion in contact with the mold is bent, the first split mold and the first split mold and The first processing step of pressing the work supported by the second split die by the male side split die, and
When the work supported by the first split mold and the second split mold is pressed by the male mold, at least the male side split mold different from the first processing step comes into contact with the work, and the work is described. In a state where the distance between the first division type and the second division type and the position of the male side division type are adjusted so that the portion of the work in contact with the male side division type is bent. A second processing step of pressing the work supported by the first split mold and the second split mold by the male side split mold, and
A feeding step of feeding the work in a direction orthogonal to the longitudinal direction is provided.
The bending processing method according to claim 7, wherein the feed process is performed after the first processing step and the second processing step are performed, and then the first processing step and the second processing step are performed again. When the work supported by the first division type and the second division type is pressed by the male mold, at least one male side division type comes into contact with the work, and the male side division in the work. With the distance between the first split mold and the second split mold and the position of the male side split mold adjusted so that the portion in contact with the mold is bent, the first split mold and the first split mold and The first processing step of pressing the work supported by the second split die by the male side split die, and
When the work supported by the first split mold and the second split mold is pressed by the male mold, at least the male side split mold different from the first processing step comes into contact with the work, and the work is described. In a state where the distance between the first division type and the second division type and the position of the male side division type are adjusted so that the portion of the work in contact with the male side division type is bent. A second processing step of pressing the work supported by the first split mold and the second split mold by the male side split mold, and
A feeding step of feeding the work to one side in a direction orthogonal to the longitudinal direction, and
The work is provided with a return step of returning the work to the other side in a direction orthogonal to the longitudinal direction.
The first processing step and the feeding step performed after the first processing step are repeated a plurality of times to carry out.
After that, the return step is carried out, and the return step is carried out.
The bending method according to claim 7, wherein the second processing step and the feeding process performed after the second processing step are repeated a plurality of times. The first split type and the male side split type facing the second split type, which are arranged with a first interval, are arranged with a second interval smaller than the first interval. The bending method according to any one of claims 7 to 9, wherein the one-split type and the male-side split type facing the second-split type are arranged closer to the female mold.

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