JPH06142771A - Device for forming metallic sheet - Google Patents

Abstract

PURPOSE:To provide a metallic sheet forming device which is capable of bending both side parts of a metallic sheet in a prescribed shape with the forming points for bending automatically followed up even for a metallic sheet whose forming points for bending are gradually changed. CONSTITUTION:Between the upper die 30 in which a first cam face 30C is formed and the lower die 31 in which a second cam face 31C is formed, with both side parts of the metallic sheet K exposed outwardly each from the upper die 30 and the lower die 31, the metallic sheet K is inserted and fixed; and simultaneously, the first and the second driving roll shafts 5, 9 are synchronously rotated by a driving motor M through a speed reduction mechanism G and driving gears 7, 11. Thus, the metallic sheet K is transported together with the upper die 30 and the lower die 31 through the first and the second driving rolls 8, 12 while, through the mutual cooperation of the first forming roll 17 and the second forming roll 22, bending is performed on both sides of the tapered metallic sheet K along the forming points for bending.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a metal plate forming apparatus for forming a predetermined shape on both sides of a metal plate using a forming roll, and particularly when the bending point of the metal plate gradually changes. Also relates to a metal plate molding apparatus capable of automatically bending a predetermined shape while automatically following the bending point.

[0002]

2. Description of the Related Art Conventionally, when performing a predetermined bending process on both side portions (flange) of a metal plate, a pair of upper and lower molds for carrying while sandwiching the metal plate and a plurality of stages fixed on both sides of the upper and lower molds are used. A roll forming apparatus is generally used that is provided with a forming roll that determines a bending forming point on both sides of a metal plate between a pair of rolls and performs a predetermined bending process.

In such a roll forming apparatus, a metal plate is conveyed while being sandwiched between a pair of upper and lower dies, and both sides of the metal plate are inserted between the forming rolls during the conveyance of the metal plate. A predetermined bending process is sequentially performed from the outer side on both side portions of the metal plate as the bending roll is determined between the forming rolls and the forming rolls from the first stage to the subsequent forming rolls are determined.

[0004]

However, in the conventional roll forming apparatus described above, the bending forming point of the metal plate is determined between the forming rolls in each of the plurality of stages. It is used when bending is performed without changing the points on both sides of the metal plate. Further, since each forming roll is fixedly arranged in the forming device and cannot be flexibly moved during the bending process of the metal plate, it is not possible to perform the bending process while changing the bending forming point. Not intended. Therefore, when a predetermined bending process is performed on both sides of a metal plate whose both sides are not formed in parallel (for example, a metal plate whose both sides are formed in a tapered shape), the conventional roll forming apparatus bends uniformly. It cannot be processed.

The present invention has been made in order to solve the above-mentioned problems of the prior art. Even a metal plate whose bending point gradually changes, the metal plate automatically follows the bending point. It is an object of the present invention to provide a metal plate molding apparatus capable of bending a predetermined shape on both sides of the metal plate.

[0006]

To achieve the above object, the present invention provides a driving means, a first driving roll which is rotationally driven by the driving means and has a first roll surface on the periphery thereof, and the first driving roll. According to the rotation of the roll, the upper die is conveyed through the first roll surface and has the first cam surface formed on both sides of the side edge, and the upper die is rotationally driven in synchronization with the first driving roll and is surrounded by the upper die. A second drive roll having a second roll face; a lower mold which is conveyed through the second roll face in accordance with the rotation of the second drive roll and has second cam faces formed on both sides of the side edge; A pair of first forming rolls which are arranged so as to be capable of advancing and retracting following the first cam surfaces of the upper mold, and a first urging means for urging the first forming rolls in the direction of the first cam surface. And it is possible to move back and forth following each second cam surface of the lower mold. A metal plate is provided between the upper mold and the lower mold, which includes a pair of second molding rolls arranged and a second biasing unit that biases each of the second molding rolls toward the second cam surface. While sandwiching and transporting the metal sheet, both sides of the metal plate are formed into a predetermined shape by the first forming roll and the second forming roll.

[0007]

According to the present invention having the above-mentioned structure, first, both the first drive roll and the second drive roll are driven through the drive means in a state where the metal plate to be molded is sandwiched between the upper die and the lower die. Are synchronously rotated. As a result, the upper die and the lower die are conveyed in a certain direction via the first roll surface of the first drive roll and the second roll surface of the second drive roll while sandwiching the metal plate therebetween.

Further, while the metal plate is being conveyed together with the upper die and the lower die in this way, the pair of first molding rolls move to the first die.
Via the biasing force of the biasing means, the pair of second molding rolls are advanced and retracted following the first cam surfaces formed on both sides of the side edge of the upper die, and the pair of second molding rolls are biased by the second biasing means. The second cam surface formed on both sides of the side edge of the lower mold is advanced and retracted via the. Therefore, while the metal plate is being conveyed as described above, both side portions of the metal plate are respectively inserted between the respective first forming rolls and the second forming rolls, so that both side portions of the metal plate are formed into the second forming rolls. It is formed into a predetermined shape by the cooperation of the first forming roll and the second forming roll.

As described above, each first molding roll is adapted to follow the first cam surface of the upper mold, and each second molding roll is adapted to follow the second cam surface of the lower mold. Therefore, even when the bending forming points on both sides of the metal plate continuously change, the bending forming point determined by each of the first forming roll and the second forming roll is continuously set to the bending forming point of the metal plate. The metal plates can be matched with each other, so that they can be formed into a predetermined shape while changing the bending points on both sides of the metal plate.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will now be described in detail with reference to the drawings. FIG. 1 is a cross-sectional view schematically showing the metal plate molding apparatus according to this embodiment, and the metal plate molding apparatus 1 is placed and fixed on a bed 2. The metal plate molding apparatus 1 has a pair of machine frames 3 and 4 (a pair of left and right in FIG. 1), and the machine frames 3 and 4 are arranged on the bed 2 in a fixed positional relationship with each other. ing. A shaft hole 3A is formed at an upper position of the left machine casing 3, and a shaft hole 3B is formed at a lower position thereof. Further, at a position above the machine frame 4 on the right side, the shaft hole 4A is opposed to the shaft hole 3A of the machine frame 3.
And a shaft hole 4B is formed in the lower position so as to face the shaft hole 3B of the machine frame 3.

A first drive roll shaft 5 is provided in each shaft hole 3A, 4A.
Is rotatably inserted, and a bolt 6 for restricting the lateral movement of the first drive roll shaft 5 is screwed to one end (the left end in FIG. 1) of the drive roll shaft 5. A drive gear 7 is fixed to the other end of the first drive roll shaft 5. A first drive roll 8 having a ridge 8B formed around the roll surface 8A is fixed at an intermediate position between the left machine frame 3 and the right machine frame 4 on the first drive roll shaft 5. The first drive roll 8 is rotationally driven according to the rotation of the first drive roll shaft 5.

Further, the first holes are provided in the respective shaft holes 3B, 4B.
A second drive roll shaft 9 similar to the drive roll shaft 5 is rotatably inserted, and one end (left end in FIG. 1) of the second drive roll shaft 9 has a left side and a right side of the second drive roll shaft 9. A bolt 10 for restricting movement in the direction is screwed, and a drive gear 11 meshing with a drive gear 7 fixed to the first drive roll shaft 5 is fixed to the other end of the second drive roll shaft 9. ing. Further, at a middle position between the left machine frame 3 and the right machine frame 4 on the second drive roll shaft 9, a second drive roll 12 having a ridge 12B formed around the roll surface 12A is fixed. And the second drive roll 12 has the second drive roll shaft 9
It is driven to rotate according to the rotation of.

Further, the first drive roll shaft 5 has a reduction mechanism G
When the drive motor M is rotated by the drive motor M, the rotation is transmitted from the reduction mechanism G to the first drive roll shaft 5 to rotate the first drive roll shaft 5. At the same time, the rotation of the first drive roll shaft 5 is transmitted to the second drive roll shaft 9 via the drive gears 7 and 11, and the second drive roll shaft 9 is rotated in synchronization with the first drive roll shaft 5. It will be.

Between the first drive roll 8 and the second drive roll 12, an upper mold 30 having a concave groove 30A formed on the upper surface and a lower mold 31 having a concave groove 31A formed on the lower surface (described later) are provided. ) Is movably disposed, and the protrusion 8B formed on the roll surface 8A of the first drive roll 8 is the upper mold 30.
Of the second drive roll 1 while being fitted into the concave groove 30A of
The ridge 12B formed on the second roll surface 12A has a lower die 31
It is fitted in the concave groove 31A. The first drive roll 8 and the second drive roll shaft 12 are synchronized with each other via the drive motor M, the reduction mechanism G, the drive gears 7 and 11, the first drive roll shaft 5, and the second drive roll shaft 9. When each of the first and second drive rolls 8 and 12 is rotated,
B, 12B through the concave grooves 30A, 31A to form the upper mold 3
0, the lower mold 31 is conveyed in the molding direction (direction perpendicular to the paper surface in FIG. 1).

Next, the upper die 30 and the lower die 31 are shown in FIG.
Will be described with reference to. 2A is a top view of the upper die 30, and FIG. 2B is a metal plate K between the upper die 30 and the lower die 31.
FIG. 2C is a bottom view of the lower mold, in which the upper mold 30 and the lower mold 31 are fixed to each other while sandwiching (to be described later). In these figures, the upper die 30 has a tapered shape (having a taper that gradually widens from the left side to the right side in FIG. 2 (A)) in a top view, and the central portion has the above-mentioned first shape. A concave groove 30A into which the protrusion 8B of the first drive roll 8 is fitted is formed. Furthermore, the upper mold 30
Screw holes 30B are formed at both ends of the upper mold 30. A fixing screw 32 (only one of which is shown) is inserted into each screw hole 30B and is screwed into a screw hole 31B of a lower mold 31 described later. The lower die 31 and the lower die 31 are fixed to each other while sandwiching the metal plate K therebetween. This state is shown in Fig. 2 (B).
Is shown in.

First cam surfaces 30C are formed on both side edges of the upper die 30, and each first cam surface 30 is formed.
C forms the tapered shape of the upper mold 30. An end surface 1 of a first molding roll 17 described later is provided on each of the first cam surfaces.
7A (see FIGS. 3 and 4) is abutted.

Further, the lower die 31 has a taper shape which is basically the same as the upper die 30 in a bottom view (a taper that gradually widens from the left side to the right side in FIG. 2C). Has a width slightly smaller than that of the upper mold 30), and the protrusion 12 of the second drive roll 12 is provided at the center.
A concave groove 31A into which B is fitted is formed. Further, screw holes 31B which match the screw holes 30B of the upper die 30 are formed at both ends thereof. Further, second cam surfaces 31C are formed on both side edges of the lower die 31,
The tapered shape of the lower die 31 is configured by each second cam surface 31C. Each of the second cam surfaces 31C has a second
The end surface 22A of the molding roll 22 (see FIGS. 3 and 4) is brought into contact.

As will be described later, an upper die 30 and a lower die 31.
The metal plate K sandwiched and fixed between and has a width larger than the width of the upper mold 30, and therefore, the metal plate K sandwiched and fixed by each upper mold 30 and the lower mold 31. Both side portions are exposed to the outside of the upper mold 30.

Now, returning to FIG. 1 and continuing the description of the metal plate forming apparatus 1, the shaft holes 3A and 3B formed in the left machine casing 3 are described.
Between the roller receiving members 13 and 14 in the upper and lower stages.
And a shaft hole 4 formed in the right machine frame 4
Between A and 4B, each roller receiving member 13, 14
Roller receiving members 15 in two stages vertically facing each other,
16 are provided.

The roller receiving members 13 and 15 are arranged so as to face each other and have the same structure. That is, a roller support member 20 including a shaft 18 that rotatably supports the first molding roll 17 and a base portion 19 integrally formed with the shaft 18 is provided on each of the roller receiving members 13 and 15 in the first drive roll 8. The roller support member 20 is arranged so as to be capable of moving forward and backward (moving forward and backward in FIG. 1).
Is a spring groove 1 formed in each roller receiving member 13, 15.
It is urged toward the first drive roll 8 via each compression spring 21 arranged between 3A and 15A and the spring groove 20A formed in the roller support member 20. At this time, the first drive roll 8 in each first forming roll 17
The end surface 17A on the side (see FIGS. 3 and 4) is the upper mold 3 described above.
0 is abutted on the first cam surface 30C formed on both side edges, and thus each first molding roll 17 is always abutted on and follows the first cam surface 30C via the biasing force of the compression spring 21. Meanwhile, the first drive roll 8 can be moved back and forth.

Like the roller receiving members 13 and 15, the roller receiving members 14 and 16 are arranged so as to face each other, and have the same configuration. That is, a roller support member 25 including a shaft 23 that rotatably supports the second molding roll 22 and a base portion 24 that is integrally formed with the shaft 23 is provided on each of the roller receiving members 14 and 16 in the second drive roll 12. The roller support member 25 is disposed so as to be able to move forward and backward (moves forward and backward in FIG. 1) and has a spring groove 14A formed in each roller receiving member 14, 16.
16A and a spring groove 25A formed in the roller supporting member 25
It is urged toward the second drive roll 12 via a compression spring 26 disposed between and. At this time,
The end surface 22A (see FIGS. 3 and 4) of the second molding rolls 22 on the second drive roll 12 side is brought into contact with the second cam surfaces 31C formed on both side edges of the lower mold 31,
As a result, each of the second molding rolls 22 is always brought into contact with and follows the second cam surface 31C via the biasing force of the compression spring 26, and can be moved back and forth with respect to the second drive roll 12.

Here, the molding surface 17B of each of the first molding rolls 17 (see FIGS. 3 and 4) and the molding surface 22B of each of the second molding rolls 22 (see FIGS. 3 and 4) coincide with each other. The first and second forming rolls 1 are formed to
When the molding surfaces 17 and 22 rotate, the molding surfaces 17B and 22B cooperate with each other to perform bending along the bending molding points P1 and P2 that continuously change on both sides of the metal plate K (this point). Will be described later).

Further, the metal plate forming apparatus 1 having the above-described structure has a plurality of stages (for example, 10 stages) in the direction perpendicular to the paper surface of FIG. 1, as is well known in the conventional roll forming apparatus. The first molding roll 17 and the second molding roll 22 are arranged continuously in each stage.
The molding surface 17B and the molding surface 22B are formed so as to match each other, while the molding surfaces 17B and 22B of the first molding roll 17 and the second molding roll 22 are formed in slightly different shapes for each step. ing. Then, by passing the metal plate K through the metal plate forming apparatus 1 at each stage, the bending forming process is gradually performed along the bending forming points P1 and P2 on both sides of the metal plate K.

Next, the operation of the metal plate molding apparatus 1 configured as described above will be described with reference to FIGS. 3 to 5. FIG. 3 is an explanatory view schematically showing a state where the bending process is started along the bending forming point P1 of the metal plate K, and FIG. 4 is a diagram showing a state where the bending process is started along the bending forming point P2 of the metal plate K. 5A is a plan view of the metal plate K before the bending process is started, FIG. 5B is a plan view of the metal plate K after the bending process is completed, and FIG. FIG. 5D is an end view showing the metal plate K which has been bent by enlarging it when viewed from the side A. FIG.
It is an end view which expands and shows from the side.

First, the metal plate K which is the object to be molded will be described with reference to FIG. 5 (A). The metal plate K has a shape (similar to that of the upper die 30) basically formed with the same taper. The metal plate K has a shape and is determined by the bending molding point P1 (the molding surface 17B of each first molding roll 17 and the molding surface 22B of the second molding roll 22) as will be described later, and gradually increases along the taper. To a bending surface of the first molding roll 17 that is located outside the bending molding point P1 and is parallel to the bending molding point P1 (similar to the bending molding point P1). (Determined by the forming surface 22B of the forming roll 22) and the bending forming process is performed.

Next, the bending process of the metal plate K will be described. First, the metal plate K is sandwiched between the upper die 30 and the lower die 31, and the screw holes 3 of the upper die 30 and the lower die 31 are held.
The fixing screw 32 is inserted through 0B and 31B to fix the metal plate K between the upper die 30 and the lower die 31. In the fixed state of the metal plate K, the bending molding point P1 of the metal plate K and the side edge of the upper die 30 are aligned with each other, and both side portions extending outward from the bending molding point P1 of the metal plate K are upward. Type 3
It will be exposed outside 0.

Next, the upper die 30 and the lower die 31 having the metal plate K fixed therebetween as described above are fitted between the first drive roll 8 and the second drive roll 12. At this time, the protrusion 8B of the first drive roll 8 is fitted into the groove 30A of the upper die 30, and
The protrusion 12B of the second drive roll 12 is provided with the concave groove 31 of the lower mold 31.
Fit to A. As a result, both the first drive roll 8 and the second drive roll 8
By rotating the drive roll 12 synchronously, both upper molds 3
0, the lower die 31 can be conveyed.

As described above, the upper die 30 and the lower die 31, which are formed by sandwiching and fixing the metal plates K, are used as the first drive roll 8 and the second die.
After being set between the drive roll 12 and the drive roll 12, the rotation drive of the drive motor M is started. The rotation of the drive motor M is reduced by the reduction mechanism G and transmitted from the drive gear 7 to the first drive roll shaft 5, and also transmitted from the drive gear 7 to the second drive roll shaft 9 via the drive gear 11. . As a result, the first drive roll shaft 5 and the second drive roll shaft 9 are rotated in synchronization with each other, and as a result, the first drive roll 8 and the second drive roll 12 are rotated in synchronization with each other. Then, as the first drive roll 8 and the second drive roll 12 are rotated, the metal plate K is sequentially sent together with the upper mold 30 and the lower mold 31 in the molding direction (direction perpendicular to the paper surface in FIG. 1). To go.

While the metal plate K is being sent in this way,
Both sides of the metal plate K are passed between the first forming roll 17 and the second forming roll 22, and the metal plate K is passed during the passage.
Both side portions of B are bent at the bending point P1 by the cooperation of the forming surface 17B of the first forming roll 17 and the forming surface 22B of the second forming roll 22. This molded state is shown in FIG.

At this time, the end surface 17 of the first molding roll 17
A is always in contact with the first cam surface 30C of the upper die 30 via the urging force of the compression spring 21, so that the first forming roll 17 follows the first cam surface 30C and bend forming point P1. It is something that is moved back and forth along. Further, the end surface 22A of the second molding roll 22 is always in contact with the second cam surface 31C of the lower die 31 via the urging force of the compression spring 26, and thus the second molding roll 22 has the second cam surface 31C. While following 31C, it is moved back and forth along the bending molding point P1 due to the interaction with the first molding roll 17. In this way, since both the first forming roll 17 and the second forming roll 22 are moved back and forth along the bending forming point P1, both side portions of the metal plate K are formed on the forming surface 17B of the first forming roll 17 and the second forming roll 17. By the cooperation with the forming surface 22B of the roll 22, the bending is continuously and accurately performed at the bending forming point P1.

As is well known, the metal plate K has a property (spring back) that the deformation returns when the bending moment is removed by its elastic restoring force. Therefore, the bending process of the metal plate K at the bending forming point P1 is performed. It is performed over a plurality of steps (stages).

After the bending process of the metal plate K at the bending forming point P1 is completed, the bending process at the bending forming point P2 is subsequently performed. In this step, the first cam surface 30C formed on the side edge of the upper mold 30 is
The end surface 17A of the first forming roll 17 is aligned with the bending forming point P2 of the metal plate K, and the first cam surface 30
While being constantly in contact with C, it is advanced and retracted along the bending point P2 via the biasing force of the compression spring 21.
Further, the end surface 22A of the second molding roll 22 follows the second cam surface 31C via the biasing force of the compression spring 26 while always contacting the second cam surface 31C formed on the side edge of the lower die 31. On the other hand, the interaction with the first forming roll 17 advances and retreats along the bending forming point P2.

Both side portions of the metal plate K are passed between the first molding roll 17 and the second molding roll 22 having the above-mentioned mutual relations, and during the passage, the first molding roll 1
Molding surface 17B of No. 7 and molding surface 22B of the second molding roll 22
Bending is performed along the bending point P2 in cooperation with. This molded state is shown in FIG.
Here, the bending of the metal plate K at the bending / forming point P2 is performed over a plurality of steps, like the bending at the bending / forming point P1.

Further, the bending of the metal plate K progresses, and the bending of the metal plate K is completed in the final step. Bending in the final step will be described. In this final step, the second cam surface 31C formed on the side edge of the lower die 31 is aligned with the bending molding point P2 of the metal plate K, and the end surface 22A of the second molding roll 22 is the second cam surface. While being constantly in contact with 31C, it is advanced and retracted along the bending point P2 via the biasing force of the compression spring 26. In addition, the end surface 17A of the first molding roll 17
Is always in contact with the first cam surface 30C formed on the side edge of the upper mold 30 and follows the first cam surface 30C through the biasing force of the compression spring 21 while interacting with the second molding roll 22. By the action, it is moved back and forth along the bending point P2.

In the final step, both side portions of the metal plate K are passed between the first molding roll 17 and the second molding roll 22 having the above-mentioned mutual relations, and the molding surface of the first molding roll 17 is passed during the passage. 17B and second molding roll 22
Bending forming point P2 in cooperation with the forming surface 22B of
A final bending process is performed along.

The metal plate K whose both sides have been bent as described above is processed by the first drive roll 8 and the second drive roll 12 in the final step together with the upper die 30 and the lower die 31 of the metal plate forming apparatus 1. It is discharged to the outside. As a result, the metal plate K having a predetermined bending process on both sides is formed. The metal plate K that has been bent is shown in FIG.
As shown in (B), FIG. 5 (C), and FIG. 5 (D), both side parts are formed into a tapered shape like the original metal plate K, and are evenly inward at the bending forming points P1 and P2. It will be molded so as to have a bent portion Q that is bent into.

As described above in detail, in the metal plate molding apparatus according to this embodiment, the upper die 30 having the first cam surfaces 30C formed on both side edges and the second cam surfaces 31C formed on both side edges are provided. The metal plate K is sandwiched and fixed between the lower mold 31 and the formed lower mold 31, and both side portions of the metal plate K are exposed outward from the upper mold 30 and the lower mold 31. A pair of first molding rolls 17 is attached to each of the fixed roller receiving members 13 and 15.
End faces 17A of the respective first molding rolls 17 are connected to each other via the urging force of the compression springs 21 in the state where they are opposed to each other.
The cam surface 30C is disposed so as to come into contact with and follow the cam surface 30C so as to be able to move back and forth, and the pair of second molding rolls 22 are opposed to the roller receiving members 14 and 16 via the urging force of the compression spring 26. The end surface 22A of each of the second molding rolls 22 abuts on the second cam surface 31C of the lower mold 31 and is arranged so as to be able to move forward and backward, and the drive motor M reduces the speed reduction mechanism G, the drive gears 7, 1.
The metal plate K is conveyed together with the upper die 30 and the lower die 31 by the first and second drive rolls 8 and 12 by rotating the first and second drive roll shafts 5 and 9 in synchronism with each other. Meanwhile, since the first forming roll 17 and the second forming roll 22 cooperate with each other to perform bending along both sides of the tapered metal plate K along the bending forming points P1 and P2, the bending of the metal plate K is performed. Molding points P1 and P
Even when 2 gradually changes, it is possible to perform a predetermined bending process on both sides of the metal plate K while automatically following the bending molding points P1 and P2.

The present invention is not limited to the above embodiments, and it goes without saying that various improvements and modifications can be made without departing from the spirit of the present invention. For example, in the above-described embodiment, each first spring is connected via each compression spring 21 and 26.
The forming rolls 17 and 22 are arranged to contact and follow the first cam surface 30C of the upper die 30 and the second cam surface 31C of the lower die 31, respectively, while bending the metal plate K. , 22 may be moved back and forth with respect to each upper mold 30 and lower mold 31 by numerical control using various control motors.

[0039]

As described above, according to the present invention, even for a metal plate whose bending point gradually changes, it is possible to automatically bend the both sides of the metal plate while following the bending point. It is possible to provide a metal plate molding apparatus that can be performed, and its effect is great.

[Brief description of drawings]

FIG. 1 is a sectional view schematically showing a metal plate molding apparatus.

2 (A) is a top view of the upper mold 30, and FIG. 2 (B) shows the upper mold 30 and the lower mold 31 with the metal plate K sandwiched between the upper mold 30 and the lower mold 31. FIG. 2C is a bottom view of the lower die, showing a state in which the two are fixed to each other.

FIG. 3 is an explanatory diagram schematically showing a state in which bending work has started along a bending forming point P1 of a metal plate.

FIG. 4 is an explanatory view schematically showing a state in which bending work has started along a bending forming point P2 of a metal plate.

5A is a plan view of a metal plate before starting bending, FIG. 5B is a plan view of a metal plate after bending, and FIG. 5C is end of bending. A metal plate
FIG. 5 (D) is an enlarged end view of the metal plate that has been bent, as seen from the side.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Metal plate molding device 5 1st drive roll shaft 7 Drive gear 8 1st drive roll 8A Roll surface 8B ridge 9 2nd drive roll shaft 11 Drive gear 12 2nd drive roll 12A Roll surface 12B ridge 17 1st molding roll 17A End surface 17B Molding surface 21 Compression spring 22 Second molding roll 22A End surface 22B Molding surface 26 Compression spring 30 Upper die 30A Recessed groove 30C First cam surface 31 Lower die 31A Recessed groove 31C Second cam surface K Metal plate M Drive motor P1 , P2 Bending molding point

Claims (1)

[Claims] 1. A drive unit, and a first drive unit that is rotationally driven by the drive unit and that is provided around the periphery.
A first drive roll having a roll surface; an upper die which is conveyed through the first roll surface in accordance with rotation of the first drive roll and has first cam surfaces formed on both sides of a side edge; A second drive roll that is rotationally driven in synchronization with the first drive roll and that has a second roll surface on the periphery; and a second drive roll that is conveyed through the second roll surface according to the rotation of the second drive roll and that has side edges. A lower mold having second cam surfaces formed on both sides, a pair of first molding rolls arranged so as to be capable of advancing and retracting following the first cam surfaces of the upper mold; 1st urging means for urging in the direction of the 1st cam surface, a pair of 2nd molding rolls arranged so as to be able to advance and retreat following each 2nd cam surface of the lower mold, and each of the 2nd molding rolls Second urging means for urging the upper die toward the second cam surface, Conveys while nipping the metal sheet between the mold, the metal plate molding apparatus, which comprises molding both sides of a metal plate into a predetermined shape by the respective first forming rolls and the second forming rolls.