JPH11314130A - Method and apparatus for manufacturing panel plate having bent portion and overhang portion - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To provide a method and apparatus for batch-forming a peripheral portion of a metal plate and bulging the inside of a surface of the metal plate. SOLUTION: This method is a method of manufacturing a peripheral portion of a panel plate and a bulging process inside the surface in a lump, wherein the bending process is performed by fixing a plate material to a hollow movable table that operates in two directions. After that, the plate material to be processed is sandwiched by a rotatable rod-shaped upper punch attached to a main shaft and a rotatable rod-shaped lower punch provided at a position corresponding to the main shaft below the movable table, and Is moved in two directions, the rod-shaped upper and lower punches are subjected to sequential bending while being driven and rotated by sliding with the plate material to be processed, and then successively stretch-formed continuously. A method of manufacturing a panel plate having a bent portion and an overhang portion.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for manufacturing a panel plate having a bent portion and an overhang portion, and a panel for manufacturing a peripheral portion of a metal plate and forming an overhang inside the surface in a batch. The present invention relates to a method for manufacturing a plate and an apparatus therefor.

[0002]

2. Description of the Related Art Conventionally, the housing of a control panel for electricity, gas, hydraulic power, etc. is composed of a housing main body and a panel plate. This panel plate is provided at its peripheral portion to facilitate reinforcement and assembly into the housing. Is bent into an L-shape or a U-shape. In addition, the inside of the surface may be provided with a concave step portion in order to facilitate attachment of a measuring instrument or the like and to improve design.

Conventionally, in the manufacture of such a panel plate, bending of a peripheral portion and formation of a concave pattern inside a surface are performed by:
It was completely divided and performed using two dedicated mechanical devices.

[0004] Of these, the peripheral portion is generally bent using a press brake of a bending machine. This is done after mounting the plate material to be processed on the V-shaped die.
This is a method in which a V-shaped punch is pressed and bent once.

[0005] In the case of the U-shaped bending, it is necessary to use a special punching punch in order to avoid interference between the punch and the plate material to be processed. In the case of bending using the press brake, by increasing the pressing force of the punch, springback can be suppressed, and the bending radius can be reduced, so that a relatively accurate bent portion can be obtained. .

However, in the case of bending a long plate material to be processed, a large press brake is required, and there is a problem in securing space.

[0007] In addition, because of the large pressing force, it is necessary to use a high-output power and a high-rigidity punch. As a bending method using a punch, for example,
In the technique described in Japanese Patent No. 277565, there is described a method for accurately bending small electronic components such as relays, connectors, and switches. This method is a method of performing bending by continuously changing the radius of curvature of the tip of the bending punch, and a method of performing bending by gradually changing the height of the tip of the bending punch.

In any case, since the tip of the punch is gradually pressed against the surface of the plate material to be processed, the bending force is concentrated, so that it is considered that the bending can be performed with high precision by limiting to small components. However, when a large component is used, since the punch is repeatedly processed on the same surface, problems such as an increase in the size of the apparatus, rigidity and seizure of the punch, and bending accuracy may occur.

[0009] Next, when the panel plate is formed into a concave shape, it is performed by drawing or overhanging.
All of these molding methods require the use of expensive dies, and in multi-product small-quantity production, the ratio of mold cost to product price has increased, which has been a problem.

In the overmolding method, a sequential overmolding method has been reported in which a bar-shaped combination of an upper punch and a lower punch and a combination of an upper punch and a lower mold are used without using hydraulic pressure or pneumatic pressure. I have.

For example, in the technique described in Japanese Patent Application Laid-Open No. 7-132329, a peripheral portion of a plate material to be processed is held by a holder,
The lower punch is abutted from the other side in the thickness direction of the plate material to be processed, and the upper punch and the holder are moved relative to the lower punch in the thickness direction of the plate material while moving the upper punch around the lower punch. There has been reported a sequential stretch forming method in which the work piece is formed by moving.

In this molding method, symmetrical truncated conical and truncated pyramid products can be molded.

[0013] Also, "Study on Flexible Sequential Overhang Forming Using Ball Rollers" in Transactions of the Japan Society of Mechanical Engineers, Vol. 58, No. 554 (1992-10), describes a sequential overhang with a combination of an upper punch and a lower die. There is a molding method. Further, there is a method in which an elastic body is used in place of the lower die, a plate material to be processed is mounted on the elastic body, and an upper punch is pressed to sequentially form the overhang.

The technique described in Japanese Patent Application Laid-Open No. 9-85355 discloses a molding method and an apparatus for sequentially projecting a metal plate into a three-dimensional shape using two tools.
Further, Japanese Patent Application No. 9-108459 discloses a punch structure for preventing galling or the like when successively forming a sheet material by overhanging.

[0015]

Many control cabinets for electric power, gas, and hydraulic power are relatively large. In order to perform bending on the periphery of the panel plate incorporated in such a housing and to form a concave pattern inside the surface, it is necessary to use a bending machine such as a large press brake and a large, for example, a sequential overhanging apparatus. It is necessary to install two units.

For this reason, a wide installation space is required, and there is a problem in securing the installation space. In addition, since high output power is required, there is a problem in terms of energy saving.

Next, in the sequential bending process in which an L-shape or a U-shape is formed in the peripheral portion of the plate material to be processed, the sliding resistance is increased because the punch is pressed and slid on the plate material to be processed. There is a problem that the surface is galled and the surface accuracy is deteriorated.

In addition, there is a problem that the bending radius becomes large because the pressing force cannot be increased in view of the rigidity of the punch.

On the other hand, after the bending of the peripheral portion is completed, in the successive overhang forming by the upper and lower punches to make the inside of the surface of the plate material concave, the upper punch supports the plate material at the same time as the lower punch. Due to this, frictional heat is generated in high-speed molding or molding of a difficult-to-process material in order to form the work plate while squeezing, whereby the lower punch is seized and galling occurs on the forming surface of the work plate. However, there is a problem that surface accuracy is deteriorated.

The present invention has been made to solve such a problem of the prior art, and the first object of the present invention is to solve the problem.
Discloses a method of manufacturing a panel board for a large control panel, in which a bending process of a peripheral portion and forming of a concave shape inside the surface are collectively performed, that is, a novel manufacturing method and a device which can be manufactured by one device. To provide.

The second purpose is to reduce the distance L around the panel plate.
It is an object of the present invention to provide a novel bending method and apparatus capable of reducing a bending radius even in a small pressing force without generating galling on a bending surface in a U-shaped or U-shaped bending process.

A third object of the present invention is to form a concave pattern continuously inside the surface of the panel plate after the bending process is completed. It is an object of the present invention to provide a novel sequential overhang forming method and an apparatus thereof that can improve surface accuracy without occurrence of galling.

[0023]

According to the first aspect of the present invention, there is provided a method for manufacturing a metal plate in accordance with the present invention, wherein a peripheral portion of the metal plate is bent and a concave projection is formed inside the surface.
In the method of bending the peripheral portion, after moving the support provided on the hollow movable table operating in two directions to approximately the center of the hollow movable table, the work piece is mounted. With the upper punch with a sliding piece provided on the main shaft,
After pressing the plate to be processed against the support table, the lower punch provided at a position relative to the main shaft is operated upward to repeatedly move the movable table in one direction while pushing up the peripheral portion of the plate to be processed. By moving, the peripheral part of the plate material to be processed is bent into an L-shape, and then the sliding piece and the lower punch sandwich the L-shaped bent part, and simultaneously lower the upper punch provided on the main shaft, and The plate material to be processed is relatively moved in one direction, and the tip of the L-shaped bent portion is pressed against the sliding piece to be bent into a U-shape.

Further, in a second method according to the present invention, a work material having a peripheral portion bent is fixed on a hollow movable table by a clamp jig, and the work material is bent by upper and lower punches. By sandwiching the processed plate material and using the upper punch as a support, the hollow movable table is relatively moved in two directions while pushing up the lower punch, thereby sequentially projecting the inside of the surface of the processed plate material into a concave shape. is there.

Further, the third method according to the present invention is to improve the precision of the bending surface and minimize the pressing force of the bending punch,
In addition, in order to make the bending radius as small as possible, a V-shaped bead is formed in advance on the inside of the bent portion by using a cutting blade-shaped roller punch.

In order to achieve each of the above-mentioned methods, a manufacturing apparatus for simultaneously manufacturing a bending process of a peripheral portion of a metal plate and a bulging process of an inner surface portion includes a hollow movable table slidable in two directions; A support table incorporated in the movable table and movable in another direction, a rotatable upper punch is attached,
The upper and lower movable and rotation angle controllable upper punch mounting spindle and the rotatable lower punch are mounted.
The structure includes a lower punch mount that can be moved downward and can move in two directions, and an NC control device that controls the relative movement of these lower punch mounts.

The upper and lower punches for bending and the upper and lower punches for bulging are both rod-shaped and have a built-in bearing, and have a structure in which the upper and lower punches are freely rotated by sliding with a plate material to be processed. Furthermore, the upper punch with a sliding piece that presses the plate to be processed against the support on the movable table during bending is provided with a coil spring, and the sliding piece can be secured at a predetermined position even when the main shaft is lowered. Structured.

[0028]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of a method and an apparatus for manufacturing a panel plate having a bent portion and a protruding portion according to the present invention will be described with reference to FIGS.

[Embodiment 1] FIG. 1 is a partial cross-sectional view of a metal panel plate according to a method of manufacturing a panel plate having a bent portion and an overhang portion according to the present invention, and FIG. FIG. 3 is a perspective view of an L-shaped bending state using the bar-shaped upper and lower punches in the method, and FIG. 3 is a perspective view of a U-shaped bending state using the bar-shaped upper and lower punches in the method of manufacturing the panel plate of FIG. FIG.

In FIG. 1 (a), 1 is a panel plate, 2 is a U-shaped bent portion, 3 is an L-shaped bent portion, 4 is an overhang portion, 5
Is a window, and (a) and (b) are ends. FIG. 1B is an enlarged view of the end (a), and FIG.
(C) is an enlarged view of an end portion (b).

In FIGS. 2 and 3, reference numeral 6 denotes a plate material to be processed, 7 denotes a sliding piece, 8 denotes a support table, 9 denotes a tapered lower punch, 10 denotes a tapered upper punch, and 11 denotes a cylindrical lower punch.

In FIG. 2A, after the work plate 6 is pressed onto the support base 8 by the sliding piece 7, the tapered lower punch 9 rises while rotating, and the work plate 6 is rotated.
Contact

In FIG. 2B, the rotation of the tapered lower punch 9 rises and the relative movement of the plate material 6 in the X direction is performed.

In FIG. 2 (c), the lower punch 9 rises while rotating and the relative movement causes the successive bending process to proceed.

In FIG. 2D, the L-shaped bending is completed by the rotation of the lower punch 9 rising.

Subsequently, in FIG. 3A, the L-shaped bent portion of the plate material 6 to be processed is sandwiched between the side surface of the sliding piece 7 and the rotating cylindrical lower punch 11.

In FIG. 3B, the tapered upper punch 10 provided on the main shaft is then lowered while rotating, and at the same time, the plate 6 is relatively moved in the X direction.

In FIG. 3 (c), the tip of the L-shaped bent portion is pressed against the sliding piece 7 by the upper punch 10, and bent into a U-shape 2 as shown in FIG. 3 (d).

Referring to FIG. 4, upper punch 12 with a sliding piece
Will be described.

FIG. 4 is an explanatory view of processing by the upper punch with sliding pieces in the method of manufacturing the panel plate of FIG.

The plate 6 to be processed is sandwiched by the upper punch 12 with a sliding piece on the support table 8 and the lower punch 9 is raised, and at the same time, the plate 6 is relatively moved in the X direction, so that it is successively moved. The state where bending is being performed is shown.

FIG. 5 is an explanatory view of processing by a roller punch in the method of manufacturing the panel plate of FIG.

In FIG. 5, the plate 6 to be processed is sandwiched by the roller punch 14 via the plate 13 on the support base 8 to raise the lower punch 9 in a tapered shape, and at the same time, the plate 6 to be processed is moved in the X direction. The state of performing sequential bending with relative motion is shown in a partial cross-sectional view.

As described above, using the rod-shaped upper and lower punches,
By repeatedly performing relative bending of the plate material 6 to be processed and successively bending it, it becomes possible to bend large plate parts.
Further, the bending load is about 1/25 to 1/50 of that of the conventional forming method, that is, the so-called press brake, and significant energy saving is achieved.

[Embodiment 2] Next, an apparatus for manufacturing a panel plate having a bent portion and an overhang portion according to an embodiment of the present invention will be described.

FIG. 6 is a front view of a manufacturing apparatus according to the present invention, which performs bending and in-plane bulging of a peripheral portion of a panel plate at a time. FIG. 7 is a side view of the manufacturing apparatus of FIG. FIG. 8 is a processing diagram using a hollow movable table in the manufacturing apparatus of FIG. FIG. 9 is an explanatory diagram of the stretch forming process in the process of FIG.

6 to 9, 15 is an upper punch,
Reference numeral 16 denotes an upper punch mounting spindle which can be moved up and down and whose rotation angle can be controlled, 17 is a drive unit thereof, 18 is a lower punch mounting table which can be moved up and down and can be moved in X and Y directions, 19 Is a molding apparatus main body having both a bending mechanism and an extension mechanism, 20 is a hollow movable table provided with the support base 8, 21 is a driving unit that operates the hollow movable table 20 in the YY direction, and 22 is XX for hollow movable table
A driving unit that operates in the direction, a clamping jig mounting groove 23, a ball screw 24 for moving the support 8;
Reference numeral 25 denotes the driving source. Thus, an apparatus for manufacturing a panel plate having a bent portion and an overhang portion is configured.

The operation mechanism of the manufacturing apparatus for manufacturing the above-mentioned panel plate in a peripheral portion at the same time as the bending process and the bulging inside the surface will be described.

First, the support table 8 arranged on the hollow movable table 20 for bending shown in FIG. 8A installed in FIGS. 6 and 7 is substantially equivalent to the movable table 20. The state has been moved to the center. This movement is performed by the ball screw 24 and its driving unit 25.

In FIG. 8B, the work plate 6 is mounted on the hollow movable table 20, and the long end L. The work piece 6 was pressed onto the support base 8 via the plate 13 by a roller punch 14 fixed to a main shaft 16 (not shown) so as to be positioned on the support base 8 so that the bending process of E was possible. State.

In FIG. 8 (c), the work piece 6 is rolled and the short end S.S. A state in which the plate material 6 to be processed is pressed onto the support table 8 by an upper punch with a slide piece 7 fixed to the main shaft 16 while being positioned on the support table 8 so that the bending process of E is possible. .

The bending process of the peripheral portion of the plate material 6 is
The process is performed for each side while pushing the lower punch 9 to rotate the plate material 6 to be processed.

After the bending of the peripheral portion of the plate material 6 is completed, the support 8 of the hollow movable table 20 is
The state is returned from the position shown in FIG. 8A to the initial position (see FIG. 9).

Next, as shown in FIG. 8 (d), in the successive overhang forming for forming a concave shape inside the surface, after the bent plate material 6 is fixed by the clamp jig 36,
The movable table 20 is formed by relatively moving the upper punch 34 downward in the X and Y directions.

These operations are all performed by NC control incorporated in advance.

[Embodiment 3] The method of manufacturing the peripheral portion of the metal plate and the overhanging process in the surface of the metal plate according to the present invention will be described in more detail with reference to FIGS.

FIG. 10 is a partial cross-sectional view showing an L-shaped bending step by sequential bending in the method of manufacturing a panel plate having a bent portion and an overhang portion according to the present invention. FIG. 11 is a sectional view of the panel plate of FIG. FIG. 12 is a partial cross-sectional view showing a U-shaped bending process of an L-shaped bent portion in the manufacturing method. FIG. 12 shows a bead on a plate material to be processed by freely rotating a cutting blade-shaped roller punch in the sequential bending process of FIG. 13 is a partial cross-sectional view showing a step of forming
FIG. 14 is a cross-sectional view of a lower punch for bending processing with a built-in bearing in the method of manufacturing the panel plate of FIG. 10; and FIG. 14 sequentially projects the inside of the surface of the plate material to be processed by the upper and lower punches with the built-in bearing in the method of manufacturing the panel plate. FIG. 15 is a partial cross-sectional view showing a state in which the molding is performed, and FIG. 15 is a partial cross-sectional view showing a state in which the inside of the surface of the plate material to be processed is sequentially formed by only the upper punch with a built-in bearing in the method for manufacturing a panel plate.
Is a partial sectional view showing an example of an overhanging upper punch incorporating a bearing used in the method for manufacturing a panel plate according to the present invention, and FIG. It is a fragmentary sectional view which shows another example of the lower punch for overhang forming.

First, a sequential bending process in a method for manufacturing a panel having a bent portion and an overhang portion according to the present invention will be described with reference to FIG.
This will be described with reference to FIGS.

10 to 13, reference numeral 26 denotes a bearing holder of the upper punch 10 for bending, 27 denotes a punch mounting plate fixed to the main shaft 16, and 28 denotes a sliding piece 7.
Positioning plate, 29 is a coil spring, 30 is a needle bearing with a thrust bearing, 31 is a radial bearing, 32 is a cutting edge roller punch for forming a bead on the opposite surface of a bent portion, 33 is a bead, 34
Is a cylindrical upper punch.

As shown in FIG. 10A, the support 8 provided on the hollow movable table 20 (not shown) is moved to a substantially central portion of the hollow movable table 20 (see FIG. 8). ) The plate material 6 to be processed is mounted. The plate material 6 to be processed is pressed against the support base 8 by a coil spring 29 provided on the main shaft 16 and the upper punch 12 with the sliding piece 7.

After that, as shown in FIG. 10B, the lower punch 9 provided at a position relative to the main shaft 16 is raised while rotating, and the plate material 6 to be processed is rotated.
, And sequentially raised.

At the same time, the plate material 6 is repeatedly moved in the X direction (perpendicular to the plane of the paper), and is relatively moved.
Is sequentially bent.

In this case, as shown in FIG. 10B, at the stage when the bending has progressed to a certain angle (about 60 degrees), FIG.
As shown in (c), the lower punch 9 is changed from the tapered lower punch 9 to the cylindrical lower punch 11, and the upper punch is rotated and rotated to be bent into an L-shape.

When bending is performed under the same conditions, the resistance to the bending force is large at the central portion and small at both ends at the central portion and at both ends of the plate material 6 to be processed. become worse.

Therefore, the center of the plate 6 is stronger than both ends, and the plate 6 is pressed against the side of the sliding piece 7 by the lower punch against the support base 8.

The sliding piece 7 serving as a support at the time of bending is pressed against the surface of the plate material to be processed by the upper punch 12 via the coil spring 29 and further backed up by the positioning plate 28. The plate material 6 does not shift due to the bending force.

After the completion of the L-shaped bending, FIG.
As shown in (a), the L-shaped bent portion is sandwiched between the side surface of the sliding piece 7 and the outer peripheral surface of the cylindrical lower punch 11, and
Is lowered while rotating the tapered upper punch 10 provided in the above, so as to come into contact with the tip of the L-shaped bent portion of the plate material 6 to be processed, and further lowered sequentially. At the same time, the plate material 6 to be processed
Is repeatedly moved in the X direction (perpendicular to the paper) to complete the U-shaped bending process.

In this case, when the bending has progressed to a certain angle (about 40 degrees), the tapered upper punch 10 is replaced with a cylindrical upper punch 34 and lowered to be bent into a U-shape.

In this embodiment, as shown in FIG. 12 (b), a bead 33 is formed in advance on the inside of the bent portion by the cutting blade roller 32 shown in FIG.
Was formed and then bent.

Thus, the bending force and the radius of curvature of the bending can be reduced, and the bending accuracy can be improved.

Further, the pressing force of the sliding piece 7 against the plate material 6 to be processed can be controlled by the coil spring 29, so that the operation of the movable table 20 in the X direction is not hindered.

Further, as shown in FIG. 13, since all the punches for bending work have the bearings 30 and 31 built in, the punches freely rotate by sliding with the plate material 6 to be processed. No defects such as galling on the bent surface occur.

Next, the successive overhang forming method will be described with reference to FIGS.

FIG. 14 is a partial cross-sectional view showing a state in which the upper and lower punches are successively forming a concave shape in the surface of a plate material to be processed, FIG. 16 is a cross-sectional view of the upper punch for forming a protrusion, and FIG. 1 shows a sectional view of a lower punch for overhang forming.

First, the U-shaped bent plate material 6 is fixed on the hollow movable table 20 by the clamp jig 36, and then rotated using the rotating upper punch 34 as a support. While pushing up the lower punch 35,
The hollow movable table 20 is relatively moved in the X and Y directions to sequentially form an overhang in the surface of the plate material 6 to be concave.

The overhang forming upper punch shown in FIG. 16 and the overhang forming lower punch shown in FIG. 17 each have a needle bearing 30 with a thrust bearing and a radial bearing 31 built therein. Can rotate freely by sliding. Therefore, galling can be prevented in high-speed molding or molding of difficult-to-process materials.

Another embodiment of the sequential overhang forming method according to the present invention will be described with reference to FIG.

FIG. 15 shows the inner edge surface 3 of the movable table 20.
FIG. 7 is a partial cross-sectional view showing a state in which the inside of the surface of the plate material 6 to be processed is successively formed in a concave shape by the upper punch 7 and the upper punch 34. In this method, the hollow movable table is relatively moved in the X and Y directions while the upper punch 34 is rotated and lowered to sequentially perform the overhang forming, so that a forming program can be easily set. Also, no lower punch is required.

[Embodiment 4] Another embodiment of the sequential bending of the peripheral portion of the panel plate according to the present invention will be described with reference to FIGS.

FIG. 18 is a partial cross-sectional view of an L-shaped bending process among the sequential bending processes of a peripheral portion of a panel plate having a bent portion and an overhang portion according to the present invention. FIG. 19 is a partial cross-sectional view in which a U-shaped bending process is performed on the tip after the L-shaped bending process of FIG. 18 is completed.

In FIG. 18, the plate 6 to be processed is supported by the support 8
Is positioned by the threaded upper punch 38 and the adjustment nut 39. After that, the L-shaped bending process proceeds in the same operation order as described in the above [Embodiment 1].

After the L-shaped bending process is completed, the L-shaped bent portion is sandwiched between the side surface of the sliding piece 7 and the outer periphery of the cylindrical lower punch 11, and the tapered upper punch provided on the main shaft 16 is rotated while rotating 10 times. Lower the L of the plate material 6 to be processed.
Make contact with the tip of the bend. Further, at the same time as lowering sequentially, the plate material 6 to be processed is moved in the X direction (perpendicular to the paper surface).
Repeat the relative movement to make a U-shaped bending process.

In this case, at the stage where the bending has progressed to a certain angle (about 40 degrees), the tapered upper punch 10
And the upper punch 40 with a roller 41 with a built-in needle bearing is lowered and bent into a U-shape. Thereby, since the bending is performed successively while freely rotating by sliding with the plate material 6, no defect such as galling occurs on the processed surface.

[Embodiment 5] Another embodiment of a method of manufacturing a panel plate having a bent portion and an overhang portion according to the present invention will be described with reference to FIGS.

FIG. 20 is a partial cross-sectional view of a U-shaped bending process in a sequential bending process of a peripheral portion of a panel plate having a bent portion and an overhang portion according to the present invention. FIG. 21 is a partial cross-sectional view of a U-shaped bending process among the sequential bending processes of a peripheral portion of a panel plate having a bent portion and an overhang portion according to the present invention.

FIGS. 20 and 21 show that the punch 42 is mounted horizontally on the main shaft 16 via the punch mounting plate 27 and the hydraulic cylinder 44.
FIG. 6 is a partial cross-sectional view showing a state in which the plate material 6 is extruded forward (to the left in the drawing) through a U-shape, and the plate material 6 to be processed is U-shaped.

First, in FIG. 20, the slide piece 7 is positioned by the coil spring 29, and the work piece 6 is pressed. FIG. 21 shows a state in which the sliding piece 7 is positioned by the threaded punch 38 and the adjusting nut 39 and the workpiece 6 is pressed.

In both cases, the U-shaped bending punch 4
2 is built in the moving table 43 with a built-in bearing and is connected to the hydraulic cylinder 44, so that it is sequentially bent while being freely rotated by sliding with the plate material 6 simultaneously with the horizontal operation.

Therefore, no defect such as galling occurs on the bent surface, and the bending accuracy such as the perpendicularity can be ensured.

[Embodiment 6] Another embodiment of the present invention, in which a peripheral portion of a panel plate having a bent portion and an overhang portion is sequentially bent, will be described with reference to FIG. FIG. 22 is a partial cross-sectional view of a U-shaped bending process in a sequential bending process of a peripheral portion of a panel plate having a bent portion and an overhang portion according to the present invention.

In FIG. 22, the work plate 6 is mounted on a fixed table 47, and a movable punch table 48 having a punch 12 with a sliding piece, a lower punch 9 for L-shaped bending and a punch 42 for U-shaped bending. Are repeatedly reciprocated in parallel with the fixed table 47 and are sequentially bent.
The movable punch table 48 includes a rail 5 provided on a rail table 49.
1 is moved using the ball screw 50 as a power source.

Therefore, it is possible to control the moving speed,
The space between the fixed table 47 and the side surface can be secured with high accuracy. The pressing force of the punch 12 with the sliding piece 7, the horizontal movement of the U-shaped bending punch 42, and the upward movement of the lower punch 9 are controlled by hydraulic cylinders 44 connected to the respective punches.
It is performed by There is no particular problem if the operation is performed with another power source such as a ball screw or compressed air.

[Embodiment 7] Another embodiment of the present invention will be described with reference to FIGS. 23 and 24.
FIG. 23 is a partial cross-sectional view showing an L-shaped bending step in the sequential bending of a peripheral portion of a panel plate having a bent portion and an overhang according to the present invention. FIG. 24 shows the sequential bending process of the peripheral portion of the panel plate having the bent portion and the overhang portion according to the present invention.
It is a partial sectional view of an L-shaped bending and a U-shaped bending process.

In FIG. 23, the tapered lower punch 9
The lower punch 9 by the rack 54 and the pinion 53.
The inclination angle of the tapered portion can be changed.

That is, FIG. 23 (a) shows the lower punch table 5
5 raises the tapered lower punch 9 and the rack 54 to a position where the tapered lower punch 9 contacts the workpiece 6.

Further, FIG. 23B shows that the rack 54 is independently raised by another power source (not shown).
Since the pinion 53 incorporated in the punch holder 52 rotates, and thereby the inclination angle of the punch 9 can be changed, the workpiece 6 is gradually L-shaped.

Further, FIG. 23C shows the L of the workpiece 6.
Complete the character processing.

According to this embodiment, the bent surface of the plate material 6 to be processed and the tapered surface of the punch 9 are always in surface contact and the bending proceeds in this state, so that a highly accurate bent surface can be obtained.

Next, in FIG. 24A, the lower punch is divided into a tapered portion 9 and a straight portion 56, which are connected by a pin 58, and only the tapered portion 9 can be inclined about the pin 58 as an axis. It was made.

As a result, since the inclination angle of the punch can be changed, surface contact with the plate material to be processed becomes possible, and a highly accurate bent surface can be obtained.

The L-shape processing is completed according to the procedure described with reference to FIG.

Next, in FIG. 24A, the upper punch is formed by incorporating the tapered punch 10 and the columnar punch 34 for U-shaped bending into the rotary chuck 57.

In the upper punch, the tapered surface of the U-shaped bent tapered shape 10 is brought into contact with the L-shaped machined portion, and the tapered surface is lowered.

In FIG. 24 (b), the L-shaped part is slanted. In FIG. 24C, the tapered punch 1
The operation of switching the rotary chuck 57 to 0 is changed to the cylindrical punch 34, that is, the rotary chuck 57 is rotated, and the tapered punch 10 is replaced with the cylindrical punch 34. The L-shaped portion is formed into a U-shaped bent portion by the cylindrical punch 34.

[Embodiment 8] FIGS. 25 and 26 show another embodiment of the sequential bending of the peripheral portion of the panel plate according to the present invention.
This will be described with reference to FIG. FIG. 25 is an explanatory diagram of another embodiment of the sequential bending process of the peripheral portion of the panel plate having the bent portion and the overhang portion according to the present invention, and FIG. 26 is an explanatory diagram of a punch used in the sequential bending process of FIG. It is.

In FIG. 25, the workpiece 6 is
At 3, it is pressed against the support base 8 and fixed.

On the punch holder 62, a cylindrical lower punch 61 that freely rotates by contact with the workpiece 6 and two lower punches 59 and 60 having different taper angles are arranged and fixed in series. Then, the support 8 on which the plate material 6 is mounted is relatively moved in the X or Y direction, and the punch holder 62 is moved upwardly to sequentially bend the peripheral portion of the work material 6 into an L-shape. Can be.

This will be described in more detail with reference to FIG.

A punch 59 having a small taper angle θ 1, a punch 60 having a large taper angle θ 2, and a columnar punch 61 are arranged in series, for example, and fixed on a punch holder 62. Next, when the work plate 6 is moved in parallel to the arrangement direction of the punches, the punch 5 having a small taper angle is firstly moved.
9 is in contact with the plate material 6 to be processed, the bending is started gently, the punch having a large taper angle θ2 comes into contact, and finally the cylindrical punch comes into contact, and the L-shaped bending is completed. As shown in FIG. 26, the punches are inserted into the needle bearing 30 with a thrust bearing and the radial bearing 31, so that the punches can freely rotate by contact with the plate material to be processed.
According to the present embodiment, since the punch is provided corresponding to the bending angle, scratches caused by sliding with the plate material 6 to be processed can be prevented.

[Embodiment 9] Another embodiment of the present invention will be described with reference to FIG. 27 and FIG. 28, in which a peripheral portion of a panel plate having a bent portion and a protruding portion is sequentially bent. FIG. 27 is an explanatory diagram of a lower tool that performs an L-shaped bending process among the sequential bending processes of a peripheral portion of a panel plate having a bent portion and an overhang portion according to the present invention. FIG. 28 is a partial cross-sectional view of an L-shaped bending process using a lower tool shown in FIG. 27 in a sequential bending process of a peripheral portion of a panel plate having a bent portion and an overhang portion according to the present invention.

In FIG. 27A, a cylindrical lower punch 64 is supported by a support portion 67 via a radial bearing 68 shown in FIG. 27C, and the support portion 67 includes a lower tool base 65 and a pin 66. Therefore, the lower punch 64 and the support portion 67 can rotate about the pin 66 with respect to the lower tool base 65.

Referring to FIG. 28, a method of performing L-shaped bending using the lower tool of FIG. 27 will be described.

In FIG. 28A, the lower tool base 65
The lower punch 64 and the supporting portion 67 are raised by the rise of the lower punch 64 to a position where the lower punch 64 comes into contact with the workpiece 6.

FIG. 28B shows the lower tool base 6.
When the workpiece 5 rises, the lower punch 64 is pressed against the workpiece 6, and the lower punch 64 and the support portion 67 rotate about the pin 66 due to deformation resistance during bending with the workpiece 6, and the lower punch 64. Can be changed, and the workpiece 6 is gradually L-shaped.

FIG. 28 (c) shows a state in which the lower base is further raised from the state of FIG. 23 (b). L-shape processing is further advanced by the lower punch 64 rotating about the center.

Further, FIG. 28D shows the L of the workpiece 6.
Complete the character processing. According to the present embodiment, the bent surface of the workpiece 6 and the cylindrical surface of the lower punch 64 are always in surface contact from the start of bending to the end of the L-shape processing, and the bending proceeds in this state, so that a highly accurate bent surface Is obtained. Further, since the inclination angle can be changed by the deformation resistance due to the pressing of the workpiece 6 and the lower punch 64, another driving source is not required.

The L-shape processing is completed by the procedure shown in FIG.

[0118]

As described above in detail, according to the structure of the present invention, the sequential bending of the peripheral portion of the metal plate and the sequential overhanging of the inside of the surface can be continuously manufactured by one apparatus. As a result, large and high-power bending machines such as press brakes are not required, and equipment costs can be reduced. In the bending process of the peripheral portion of the metal plate, since the plate material is freely rotated by contact with the plate material to be processed, and the lower plate is reciprocated by the lower punch, and the bending process is repeated. Reduction can be achieved. This can save energy. In addition, high precision of the bent surface can be achieved.

In the overmolding of the inside of the surface of the metal plate, the sliding resistance at the time of molding can be reduced because the upper and lower punches with built-in bearings are rotated freely by contact with the plate material to be processed. . Therefore, high-speed molding is possible. In addition, the occurrence of galling on the molding surface can be prevented.

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional view of a metal panel plate according to a method for manufacturing a panel plate having a bent portion and an overhang portion according to the present invention.

FIG. 2 shows a top view of a bar-shaped plate in the method of manufacturing the panel plate of FIG.
It is a perspective view of the L-shaped bending process state using a lower punch.

FIG. 3 shows a top view of a bar-shaped panel in the method of manufacturing the panel plate of FIG.
It is a perspective view of a U-shape bending state using a lower punch.

FIG. 4 is an explanatory view of processing by an upper punch with a sliding piece in the method of manufacturing the panel plate of FIG. 1;

FIG. 5 is an explanatory view of processing by a roller punch in the method of manufacturing the panel plate of FIG. 1;

FIG. 6 is a front view of a manufacturing apparatus according to the present invention, which performs bending and in-plane bulging of a peripheral portion of a panel plate at a time.

FIG. 7 is a side view of the manufacturing apparatus of FIG.

8 is a processing diagram of a hollow movable table in the manufacturing apparatus of FIG.

FIG. 9 is an explanatory view of an overhang forming process in the process of FIG. 8;

FIG. 10 is a partial cross-sectional view showing an L-shaped bending step by sequential bending in the method of manufacturing a panel plate having a bent portion and a protruding portion according to the present invention.

FIG. 11 is a partial cross-sectional view showing a U-shaped bending process for an L-shaped bent portion in the method of manufacturing the panel plate of FIG. 10;

12 is a partial cross-sectional view showing a step of forming a bead on a plate material to be processed by rotating a cutting edge-shaped roller punch in the sequential bending process of FIG. 10;

13 is a cross-sectional view of a lower punch for bending with a built-in bearing in the method of manufacturing the panel plate of FIG. 10;

FIG. 14 is a partial cross-sectional view showing a state in which the inside of the surface of the plate material to be processed is successively formed by the upper and lower punches with a built-in bearing in the method of manufacturing a panel plate.

FIG. 15 is a partial cross-sectional view in which the inside of the surface of the plate material to be processed is sequentially formed by only the upper punch with a built-in bearing in the method of manufacturing a panel plate.

FIG. 16 is a partial cross-sectional view showing an example of an overhang forming upper punch incorporating a panel plate bearing according to the present invention.

FIG. 17 is a partial cross-sectional view showing another example of the lower punch for overhang molding incorporating the panel plate bearing according to the present invention.

FIG. 18 is a partial cross-sectional view of an L-shaped bending process in a sequential bending process of a peripheral portion of a panel plate having a bent portion and an extended portion according to the present invention.

FIG. 19 is a partial cross-sectional view of a U-shaped bending process at the tip after the L-shaped bending process shown in FIG. 18 is completed.

FIG. 20 is a partial cross-sectional view showing a state in which a sliding piece is pressed by a coil spring and a punch is horizontally moved to perform a U-shaped bending process.

FIG. 21 is a partial cross-sectional view showing a state in which a sliding piece is pressed by a threaded punch and an adjustment nut, and the punch is horizontally moved to perform a U-shaped bending process.

FIG. 22 is a partial cross-sectional view showing a state in which a plate material to be processed is mounted on a fixed table and a punch table is operated to perform bending.

FIG. 23 is a partial cross-sectional view showing an L-shaped bending step in the sequential bending of a peripheral portion of a panel plate having a bent portion and an overhang according to the present invention.

FIG. 24 is a partial cross-sectional view of an L-shaped bending and a U-shaped bending process in the sequential bending process of the peripheral portion of the panel plate having the bent portion and the overhang portion according to the present invention.

FIG. 25 is an explanatory view of another embodiment of the sequential bending process of the peripheral portion of the panel plate having the bent portion and the overhang portion according to the present invention.

26 is an explanatory diagram of a punch used for the sequential bending of FIG. 25.

FIG. 27 is an explanatory diagram of a lower tool that changes the inclination angle of a cylindrical lower punch with a pin as an axis.

FIG. 28 is a partial cross-sectional view showing an L-shaped bending step in the sequential bending of a peripheral portion of a panel plate having a bent portion and a projecting portion according to the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Panel board, 2 ... U-shaped bent part, 3 ... L-shaped bent part,
4 Projection, 5 Window, 6 Workpiece plate, 7 Slide piece, 8 Support base, 9 Tapered lower punch, 10 Tapered upper punch, 11 Columnar lower punch, 12 Upper punch with sliding piece, 13 ... plate, 14 ... roller punch, 15
... upper punch, 16 ... spindle, 17 ... drive part of spindle, 18 ...
Lower punch mounting table, 19: molding apparatus main body, 20: hollow movable table, 21: drive unit for operating the movable table in the Y direction, 22: drive unit for operating the movable table in the X direction, 23: clamp jig Mounting groove, 24: Ball screw, 25: Ball screw drive, 26: Upper punch bearing holder, 27: Punch mounting plate, 28
... Positioning plate, 29 ... Coil spring, 30 ... Needle bearing with thrust bearing, 31 ... Radial bearing, 32 ... Cutting blade roller punch, 33 ... Bead, 3
4 ... Cylindrical upper punch, 35 ... Lower punch for overhang, 36
... Clamp jig, 37 ... Inner edge of movable table, 38
... upper punch with screw, 39 ... adjustment nut, 40 ... upper punch for roller, 41 ... roller, 42 ... horizontal punch for U-shaped bending, 43 ... moving table with built-in bearing, 44 ... hydraulic cylinder, 45 ... guide post, 46 ... guide pin, 47 ...
Fixed table, 48: movable punch table, 49: rail table, 50: ball screw, 51: rail, 52: punch holder, 53: pinion, 54: rack, 55: lower punch table, 56: lower punch straight section , 57: rotary chuck, 58: pin, 59: punch with small taper angle,
Reference numeral 60: punch having a large taper angle, 61: cylindrical punch, 62: punch holder, 63: punch holder, 64
... lower punch, 65 ... lower tool base, 66 ... pin, 6
7 ... support part, 68 ... radial bearing.

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Akio Shima 7-1-1, Higashi-Narashino, Narashino-shi, Chiba Industrial Equipment Division, Hitachi, Ltd. (72) Inventor Koichi Kashiwa 1-1-1, Kokubuncho, Hitachi-shi, Ibaraki No. 1 Hitachi, Ltd. Kokubu Plant (72) Inventor Yoshio Koguchi 1-1-1, Kokubuncho, Hitachi City, Ibaraki Prefecture Inside Hitachi Ltd. Kokubu Plant (72) Inventor Ryuichi Watanabe Hitachi, Ibaraki Prefecture 1-1-1, Kokubucho, Kokubu Plant, Hitachi, Ltd. (72) Inventor Masayoshi Hashiura 1-1-1, Kokubuncho, Hitachi, Hitachi, Ibaraki Prefecture Kokubu Plant, Hitachi, Ltd. (72) Inventor Motoo Oga 1-1-1, Kokubuncho, Hitachi City, Ibaraki Prefecture Kokubu Plant, Hitachi, Ltd. (72) Inventor Yasuhiro Nonaka 1-1-1, Kokubuncho, Hitachi City, Ibaraki Prefecture Inside the Kokubu Plant of Hitachi, Ltd.

Claims (9)

[Claims] 1. A method for manufacturing a panel board in a peripheral portion and a bulging inside a surface in a lump, wherein the bending is performed on a hollow movable table for operating a plate material to be processed in two directions. After being fixed, the plate material to be processed is sandwiched between a rotatable rod-shaped upper punch attached to a main shaft and a rotatable rod-shaped lower punch provided at a position corresponding to the main shaft below the movable table, and The table is moved in two directions, and the bar-shaped upper and lower punches are sequentially bent while being driven and rotated by sliding with the plate material to be processed, and then successively stretch-formed continuously. Manufacturing method of a panel plate having a bent portion and an overhanging portion. 2. A method for manufacturing a peripheral portion of a panel plate and forming an overhang inside the surface in a lump, wherein the overhanging inside the surface is performed by bending the peripheral portion on a hollow movable table. The processed plate material is fixed by a clamp jig, the hollow movable table is relatively moved in two directions, and the rotatable upper and lower punches are driven and rotated by sliding with the processed plate material, 2. The method according to claim 1, wherein the upper punch is used as a support, and the lower punch is pushed up to form an overhang on the inner surface of the workpiece. 3. A method for simultaneously manufacturing a bending process for a peripheral portion of a panel plate and a bulging process inside a surface, wherein the bending process for the peripheral portion of the panel plate is performed by a support table provided on a hollow movable table. Is moved to a substantially central portion of the hollow movable table, a work plate is mounted thereon, and the work plate is pressed against the support table by an upper punch having a sliding piece provided on a main shaft, and then the movable plate is moved. The relative motion of the table is repeated in one direction, and the rotatable lower punch disposed at a position corresponding to the main shaft is driven upward by sliding with the plate to be processed, and is operated upward to rotate the lower punch. The peripheral portion of the processed plate material was pushed up to bend the peripheral portion of the processed plate material into an L-shape, and then the bent portion was sandwiched into the L-shape by the sliding piece and the lower punch, and the processed plate material was mounted. One movable table Causes relative movement direction, by sliding between the workpiece plate punch on for bending a rotatable was deployed in the main shaft, is lowered while being rotated,
A method of manufacturing a panel plate having a bent portion and an overhang portion, wherein the panel plate is bent into a U-shape. 4. A manufacturing method for simultaneously manufacturing a bending process on a peripheral portion of a panel plate and a bulging process inside a surface, wherein the bending process is performed under a columnar shape which is driven and rotated by sliding with a plate material to be processed. A punch and a plurality of lower punches having different taper angles at the tips of the tips are fixed to a punch holder, the movable table on which the plate material to be processed is mounted is moved in two directions, and the punch holder is moved upward in the relative motion. 4. The method according to claim 3, wherein the peripheral portion of the plate material to be processed is sequentially bent into an L-shape. 5. A panel plate having a bent portion and an overhang portion according to claim 3, wherein a V-shaped bead is previously formed inside the bent portion by a roller punch having a cutting blade shape, and then the bent portion is bent. Manufacturing method. 6. A manufacturing apparatus for simultaneously manufacturing a bending process of a peripheral portion of a panel plate and a bulging process inside a surface, a hollow movable table movable in two directions, and built in the movable table in one direction. A movable support base, a rotatable upper punch are attached, and a main shaft that can move up and down and whose rotation angle is controllable, and a rotatable lower punch is attached and can move up and down and are bidirectional An apparatus for manufacturing a panel plate having a bent portion and a protruding portion, comprising: a lower punch mounting table movable in a direction, and an NC controller for controlling relative movements of the lower punch mounting tables. 7. The rotatable upper and lower punches for bending and overhanging each have a built-in bearing, and have a structure that is freely driven and rotated by sliding with a plate material to be processed. An apparatus for manufacturing a panel plate having a bent portion and an overhang portion according to claim 6. 8. The bending part according to claim 6, wherein an elastic body is provided on the upper punch with a sliding piece, and the sliding piece is secured at a predetermined position even when the main shaft is lowered. Panel plate manufacturing equipment with a protruding part. 9. A manufacturing method for manufacturing a panel plate at a peripheral portion at a time and manufacturing a bulge inside the surface in a lump, wherein the bending is performed by a cylindrical pressing that is driven to rotate by sliding with a workpiece. A lower punch having a portion, wherein the pressing portion is fixed to a punch holder, the lower punch supported by a support capable of freely changing an inclination angle in a direction perpendicular to the width direction of the workpiece, and the workpiece is mounted. The peripheral portion of the workpiece is sequentially bent into an L-shape by moving the movable table relatively in two directions and the punch holder in the upward direction. Manufacturing method for panel boards.