JPH1157864A - Device for bending plate material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain an effective bending process with less rotating operation by installing a second fixed die which forms a second fixed processing face opposite to a second movable processing face formed on the other end side of a movable die, and processing a plate material on the second movable processing face and the second fixed processing face. SOLUTION: The objective die is, for example, a die for square bending. An upward processing face 7 formed on the first fixed die 6, and a downward processing face 10 of the second fixed die are V shaped. The first movable processing face 12 on the lower side and the second movable face 13 on the upper side of a movable die 11, are also formed for square bending. The plate material is inserted between a fixed die 9 and the movable die 11, and bent by rising the movable die 11. The plate material is pulled out by lowering the movable die 11 slightly, and is put on the fixed die 6, and then is bent by lowering the movable die 11. The plate material is turned upside down by a small rotation depending on the shape, and continues to be bending processed. This makes it possible to reduce the rotation frequency, perform the processing by only the small rotate without a big rotation or a horizontal rotation, and improve the work efficiency and the site efficiency in the bending processing of the plate material.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bending apparatus for bending a sheet material.

[0002]

2. Description of the Related Art FIGS. 9 and 10 show a conventional bending apparatus (hereinafter referred to as "conventional bending apparatus"). The conventional bending apparatus 50 has side frames 51, 51 on the left and right sides of the front, and a movable frame 52 mounted on the upper side thereof has a driving device 5 indicated by a chain line.
3 to move up and down. Movable frame 5
At the lower end of 2, a male member (punch) 55 is attached by a mounting member 54.
The male mold 55 also moves up and down in accordance with the up and down movement of the movable frame 52. A female die (die) 58 is fixed on a fixed frame 56 facing the movable frame 52 in the up-down direction via a support 57, and the female die 58 and the male die 55 cooperate to form a plate material. It is designed to be bent.

[0003] The bending process in the conventional bending apparatus is
This will be described briefly with reference to FIGS. FIG. 11 is a diagram showing a bending process, FIG. 12 is a table showing a configuration of a bending process, and FIG. 13 is a diagram of a plate material after the bending process viewed from a side. Each number indicates an abutment point and a bending point. Further, "small rotation", "large rotation", and "horizontal rotation" indicate directions in which the plate material is rotated, and have the following meanings. “Small rotation” means turning the plate material in the front-rear direction, and “large rotation” means turning the plate material in the left-right direction. That is, when performing bending of a long and thin plate material, it is a small rotation to exchange one long side and the other long side by turning in the width direction and turning over, and by turning in the length direction and turning over. Swapping one short side and the other short side is a giant revolution.
"Horizontal rotation" means exchanging one long side and the other long side without turning over the plate material, that is, rotating the plate material in the horizontal direction. Therefore, if the plate material is rotated slightly after rotating it slightly, turning it over once and turning it over again means that one long side and the other long side are exchanged. Will be the same as

First, in a first step, a bending point 2 is processed into an L-shaped bent plate material. Next, the plate material M is turned over by a large rotation, and the bending point 3 is bent (second step). Then, the sheet material M
Is rotated horizontally to bend the bending point 8 (third step). Further, the plate material M is rotated by a large rotation and turned over, and the bending point 5 is bent (fourth step). This time, the plate material M is turned slightly and turned over to bend the bending point 4 (fifth step). The plate material is again rotated slightly and turned over to bend the bending point 7 (sixth step), and the bending point 6 is bent without being rotated and shifted as it is (seventh step). Finally, the plate material M is horizontally rotated and turned over, the bending point 1 is bent, and the processing is completed. Thus, using the conventional bending device,
Small rotation, large rotation and horizontal rotation must be performed twice each.

[0005]

Of course, rotating a plate in the course of bending means that it takes a lot of time and effort to work, and it is needless to say that the number of rotations should be as small as possible. . Further, the conventional bending apparatus is generally used for bending a plate material having a length of about 4 meters, but some of them exceed 8 meters. At least 8 diameters are required for horizontal rotation of 8 meter long plates.
A circular site of a meter is required. It is relatively good to make small rotations of plate materials, but to make large or horizontal rotations, such a large work space is required. Is restricted. In other words, the utilization efficiency of the site is low. A technical problem to be solved by the present invention is to reduce the number of rotation operations as much as possible so that bending can be performed efficiently and the use efficiency of a factory site is improved.

In order to solve the above-mentioned problems, the inventor has
Until now, bending was performed only when the male mold descended and ascended, but we focused on using the action when the male mold that descended and ascended went up and down. By using this, it is possible to perform two steps of bending while the male mold makes one reciprocation, and it is possible to reduce the number of times the plate material is rotated. The present invention has been made from such a viewpoint. The detailed configuration will be described later.

According to a first aspect of the present invention, there is provided a bending apparatus, wherein a fixed first fixed mold, a movable mold provided so as to be able to approach and separate from the first fixed mold, and the movable mold are driven. A driving means for bending a plate material sandwiched between a first fixed processing surface formed on one end of the first fixed die and a first movable processing surface formed on one end of the movable die. The major feature is that a second movable processing surface is formed on the other end side of the movable die, and a second fixed processing surface opposed to the second movable processing surface is formed. The second fixed die is provided so that a plate material sandwiched between the second movable processing surface and the second fixed processing surface can be bent.

In other words, of the reciprocating movement of approaching / separating, only one of the movements (for example, the outward movement) has been used so far. And bend it. As a result, by appropriately combining the combination of the first fixed processing surface and the first movable processing surface and the combination of the second fixed processing surface and the second movable processing surface, a large rotation (small rotation) has been achieved. And horizontal rotation work can be reduced as much as possible. The specific contents will be described in detail in the embodiments of the invention.

The "first (second) fixed type" and the "movable type" in the present specification may be any type as long as they can bend a plate material in cooperation with each other. It does not matter whether it is a male type (punch) or a female type (die). The expression “first” and “second” is used to indicate a relationship in which one is first and the other is second. Any type of die may be used. Examples of such a die include right-angle bending, reverse bending, acute-angle bending, and a so-called R-bending die for forming a curved surface.
Further, the first movable processing surface is formed for right-angle bending,
It is good to combine them freely, for example, by forming the movable working surface for R bending. The "driving means" may be of any type as long as it can freely move the movable die toward and away from the first (second) fixed die, that is, can freely move toward and away from the movable die. It may be one that can be driven up and down, one that can be driven horizontally, or one other than these.

[0010] The bending apparatus according to the second aspect of the invention has basically the same configuration as that of the first aspect, and exhibits the same functions and effects within the scope thereof. The major feature is that the driving means is configured to move the movable mold up and down.

With this feature, since the bending can be performed with the plate material placed on the first fixed type (movable type), there is an advantage that the processing operation can be easily performed. That is, it is not necessary for the operator to support the weight of the plate material placed on the first fixed die, and it is sufficient to concentrate the nerve on the positioning of the plate material, so that the working operation becomes easier.

A bending apparatus according to a third aspect of the present invention has basically the same configuration as that of the first or second aspect, and performs the same functions and effects within the scope thereof. is there. Its major features are the first and second
Is a female type, and the movable type is a male type.

According to a fourth aspect of the present invention, there is provided a bending apparatus, wherein a fixed fixed die, a first movable die provided to be able to approach and separate from the fixed die, and the first movable die are driven. A plate member provided with first driving means and sandwiched between a first fixed processing surface formed at one end of the fixed die and a first movable processing surface formed at one end of the first movable die Is characterized by forming a second fixed processing surface on the other end side of the fixed die and a second movable processing surface opposed to the second fixed processing surface. Is provided, and a second driving means for driving the second movable die is provided, and the plate material sandwiched between the second fixed processing surface and the second movable processing surface can be bent. It is configured as follows.

That is, this bending apparatus is characterized in that
Are basically based on the same concept as described above, and the effect is also common in that the rotation work is reduced. The difference is that this bending device has two movable dies and one
In contrast to the one having two fixed dies, the first embodiment has one movable die and two fixed dies. The “first (second) movable type” and “fixed type” in the present specification may be any type as long as they can bend a plate material in cooperation with each other. There is no difference from the case of claim 1 in any points. First
The second drive means may be separate or integral.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of the present invention (hereinafter, referred to as "the present embodiment") will be described with reference to the drawings. FIG. 1 is a front view of the present embodiment, and FIG. 2 is a partially enlarged view of a driving unit. FIG. 3 is a schematic view showing how the movable mold moves up and down, and FIG. 4 is a process diagram of the bending process. FIG. 5 is a chart showing the steps of the present embodiment, and FIG. 6 is a view of the plate material after bending, as viewed from the side.
7 and 8 are views showing a modification of the present embodiment.

Reference numeral 1 in FIG. 1 denotes a plate bending apparatus typified by a press brake or the like. The bending apparatus 1 includes side frames 2L and 2R standing on both left and right sides.
And an upper end fixed frame 3 provided at the upper end thereof and a lower end fixed frame 4 provided at the lower end thereof.
Fix the fixed table 5 to the upper end of the lower fixed frame 4,
On the upper surface of the fixed table 5, a lower mold (first fixed mold) 6 for bending is detachably attached. An upper die (second fixed die) 9 for bending is fixed to the lower end of the upper fixed frame 3 by a mounting member 8. Upper mold 9
To replace the upper mold 9 by loosening the screws of the mounting member 8.
Is removed, another mold is clamped, and then tightened and fixed again. Reference numeral 11 denotes a movable mold (movable mold) that is driven up and down by the driving units 14 and 14.

Although the driving means 14 in this embodiment employs a pneumatic cylinder, the movable mold 11 can be moved up and down (to approach and separate from the lower mold 6 and the upper mold 9). Other devices such as a hydraulic cylinder may be used. The connection between the movable mold 11 and the driving means 14 is performed by connecting members 15 as shown in FIG. In the present embodiment, two driving units are used to support and drive the movable mold 11 from both sides.
The number may be one, or may be three or more according to the form and weight of the movable mold 11. The control of the pneumatic cylinder 14 is performed on a control panel (not shown). Although not shown in the present embodiment, it is needless to say that various safety devices for safely performing the bending process may be provided.

Next, each mold will be described with reference to FIG. Upper mold 9 and lower mold 6 in this embodiment
Are for right-angle bending as shown in FIG. Therefore, an upwardly processed surface (first fixedly processed surface) 7 formed on one end side (upper end) of the lower die (first fixed die) 6 and a downwardly directed upper die (second fixed die) 9 are formed. Each of the processing surfaces (second fixed processing surfaces) 10 is formed as a substantially V-shaped processing surface. A downward machining surface (first movable machining surface) 12 formed on one end side of a movable mold (movable mold) 11 and an upward machining surface (second movable machining surface) 13 formed on the other end side are also for right-angle bending. Is used. FIG. 3A shows a state where the movable mold 11 is lowered, and FIG. 3B shows a state where the movable mold 11 is raised.

Next, the bending process of this embodiment will be described with reference to FIGS. First, the plate material M is inserted between the upper mold 9 and the movable mold 11 to perform positioning, and the movable mold 11 is raised and clamped.
Is bent (first step). In this state, the plate material M is shaped like a hiragana. Next, the movable mold 11 is slightly lowered to pull out the plate material M, and is placed on the lower mold 6 in the same posture without rotating, and the movable mold 11 is lowered to bend the bending point 3 (No. 2 steps). When the second step is completed, the movable mold 11 is slightly raised to pull out the plate material M, and is inserted between the movable mold 11 and the upper mold 9 in the same posture. Is bent (third step). Third
When the process is completed, the movable mold 11 is slightly lowered to slightly rotate the plate material M. The plate material M, which has been turned upside down by a small rotation, is returned between the movable mold 11 and the lower mold 6, and the movable mold 11
Is raised to bend the bending point 8 (fourth step). Next, the movable mold 11 is slightly lowered to pull out the plate material M, and is inserted between the movable mold 11 and the lower mold 6 in the same posture, and the movable mold 11 is lowered to bend the bending point 5. (Fifth step). Then, the plate material M pulled out by slightly raising the movable mold 11 is inserted between the movable mold 11 and the upper mold 9 in the same posture, and the movable mold is raised to bend the bending point 4 ( Sixth step). Further, the movable mold 11 is slightly lowered, and the plate material M is pulled out.
The movable mold 11 is lowered to bend the bending point 7. Then, after slightly raising the movable mold 11, the plate material M is pushed in as it is, and the movable mold 11 is lowered to bend the bending point 6. This completes the bending.

As described above, the bending of the plate material M in the present embodiment can be performed only once, instead of six times in the operation of the same number of steps in the conventional bending apparatus. Work efficiency is very good. Also,
The method of rotating the plate material is only one small rotation, that is, it is only necessary to rotate the plate material M in the front-rear direction (width direction), and there is no need to perform large rotation or horizontal rotation, so the site required for the work is the same as before Can be significantly reduced. The rotation method and the number of rotations differ depending on the bending form of the plate material, but work efficiency and site efficiency are improved by appropriately selecting the combination of a movable mold and upper and lower fixed molds according to the bending form as described below. be able to.

FIGS. 7 and 8 show modifications of the present embodiment, respectively. These are different from the previous embodiment in the combination of the movable mold 11 and the upper and lower molds 6, 9. That is, the combination shown in FIG. 7 is the downward machining surface 10 of the upper mold 9 and the first movable machining surface 1 of the movable mold 11.
2 is formed in a male shape, and the second movable processing surface 13 of the movable die 11 and the upwardly processed surface 7 of the lower die 6 are formed in a female shape. On the other hand, the combination in FIG.
Forming the first second movable processing surfaces 11 and 12 into a female shape,
The downward machining surface 10 of the upper mold 9 and the upward machining surface 7 of the lower mold 6 are formed in a male shape. As is clear from FIGS. 7 and 8, the bending work shown by both is the same. Which combination is to be selected may be determined in consideration of bending performed before and after this bending, that is, determined so that the plate material M does not need to be rotated. It goes without saying that a processing surface having a shape other than that shown in the above-described embodiment and its modified example can be formed or a combination other than these can be performed.

Further, in the present embodiment, the upper and lower dies 6, 9 are fixed and the movable dies 11 are arranged between them. The movable mold 11 may be a fixed mold. In this case, the upper die and the lower die move up and down, and bending is performed in cooperation with a fixed die interposed therebetween. What kind of processing surface is formed on which mold should be determined so that the plate material M need not be rotated as much as possible in consideration of the bending before and after a certain bending, as described above.

[0023]

The use of the bending apparatus according to the present invention makes it possible to perform the bending work efficiently because the rotating operation of the plate material is reduced as much as possible, and it is possible to increase the utilization efficiency of the factory site.

[Brief description of the drawings]

FIG. 1 is a front view showing an embodiment of the present invention.

FIG. 2 is a partially enlarged view of a driving unit.

FIG. 3 is a schematic diagram showing a state in which a movable mold moves up and down.

FIG. 4 is a process chart of a bending process.

FIG. 5 is a chart showing steps of the present embodiment.

FIG. 6 is a side view of a plate material that has been bent.

FIG. 7 is a diagram showing a modification of the present embodiment.

FIG. 8 is a diagram showing a modification of the present embodiment.

FIG. 9 is a front view of a conventional bending apparatus.

FIG. 10 is a side view of a conventional bending apparatus.

FIG. 11 is a view showing a bending step in a conventional bending apparatus.

FIG. 12 is a table showing steps of a conventional bending apparatus.

FIG. 13 is a side view of the plate material that has been bent.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Bending apparatus 2 Side frame 3 Upper end fixed frame 4 Condylar end fixed frame 5 Fixed table 6 Fixed mold 7 Upward working surface 8 Mounting member 9 Fixed mold 10 Downward working surface 11 Movable mold 12 First movable working surface 13 Second movable processing surface 14 Drive means 15 Support member 50 Bending device 51 Side frame 52 Movable frame 53 Drive device 54 Mounting member 55 Male type 56 Fixed frame 57 Support base 58 Female type

Claims (4)

[Claims] 1. A fixed first fixed mold, a movable mold provided so as to be able to approach and separate from the first fixed mold, and driving means for driving the movable mold, wherein the first fixed mold is provided. A bending member for bending a plate material sandwiched between a first fixed processing surface formed on one end of the movable die and a first movable processing surface formed on one end of the movable die. Forming a second movable processing surface on the side, and a second fixed mold having a second fixed processing surface facing the second movable processing surface is provided. A bending apparatus characterized in that it is configured to bend a plate material sandwiched between the fixed processing surface and the second fixed processing surface. 2. The bending apparatus according to claim 1, wherein the driving unit is configured to move the movable die up and down. 3. The method according to claim 1, wherein said first and second fixed types are female types, and said movable type is a male type.
Or the bending apparatus as described in 2. 4. A fixed type, comprising: a first movable type provided so as to be able to approach and separate from the fixed type; and first driving means for driving the first movable type. A first fixed processing surface formed on one end side of the first movable die and a first movable processing surface formed on one end side of the first movable die. A second fixed processing surface is formed on the other end side of the second, a second movable die having a second movable processing surface facing the second fixed processing surface, and the second movable die are driven. A bending apparatus, comprising a second driving means, wherein a plate material sandwiched between the second fixed processing surface and the second movable processing surface can be bent.