JPH06328145A - Forming device for metallic plate - Google Patents

Abstract

PURPOSE:To provide a forming device for a metallic plate capable of surely and correctly forming both sides of the metallic plate into a prescribed shape even when the width of the metallic plate is narrow by moving two supporting members supporting a first forming roll and a second forming roll on both sides of an upper die and a lower die. CONSTITUTION:A metallic sheet K is held and fixed between an upper die 12 and a lower die 10. A forming unit is moved along a rail 40 through a drive motor 37, a ball screw 42, etc., on both sides of each of the upper die 12 and the lower die 10. The forming device is constituted so that bending forming works are performed on both sides of the metallic plate K in corporation with a first forming roll 30 and a second forming roll 31 during the movement of the forming unit.

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 by using a forming roll, and particularly when the bending point of the metal plate gradually changes. The present invention also relates to a metal plate forming apparatus capable of performing a bending forming process of a predetermined shape while automatically following the bending forming point.

[0002]

2. Description of the Related Art Conventionally, when a predetermined bending process is performed on both sides (flange) of a metal plate, a pair of upper and lower molds for carrying the metal plate while sandwiching the metal plate is fixed to the upper and lower molds in a plurality of stages. A roll forming apparatus is generally used, which is provided with a forming roll that is arranged and configured to perform a predetermined bending forming process while determining bending forming points on both sides of a metal plate between a pair of rolls. In such a roll forming apparatus, the metal plate is conveyed while being sandwiched between a pair of upper and lower molds, and both side portions of the metal plate are inserted between the forming rolls while the metal plate is being conveyed, and the metal plates are inserted between the forming rolls. The predetermined bending process is sequentially performed from the outside on both sides of the metal plate as the bending rolls are moved from the first-stage roll to the subsequent-stage roll while determining the bending point.

In such a conventional roll forming apparatus, the bending forming point of the metal plate is determined between the forming rolls in a plurality of stages. Normally, the bending forming point of the metal plate is set on both sides of the metal plate. It is used when the bending process is performed without changing. In addition, since each forming roll is fixedly installed in the forming device and cannot be moved flexibly during bending forming of the metal plate, bending forming can be performed while changing the bending forming point. Is not intended at all. Therefore, a metal plate whose both sides are not formed in parallel (for example,
When a predetermined bending process is performed on both sides of a metal plate whose both sides are formed in a tapered shape, the conventional roll forming apparatus cannot perform a uniform bending process.

In order to solve such a problem, the present applicant has proposed in Japanese Patent Application No. 4-328563 that even a metal plate whose bending point gradually changes can automatically follow the bending point. We have proposed a metal plate forming device that can perform bending forming processing on both sides of the metal plate. This metal plate molding apparatus, by the cooperation of the first roll surface of the first drive roll and the second roll surface of the second drive roll,
The metal plate is conveyed while being sandwiched between the upper mold and the lower mold, and during the conveyance, the first cams formed on both sides of the upper mold through the pair of first molding rolls via the first urging means. The pair of second molding rolls are made to follow the second cam surfaces formed on both sides of the lower mold through the second biasing means while following the surfaces, and thereby each pair of first molding rolls, and The second forming roll is used to form both sides of the metal plate into a predetermined shape. According to this metal plate forming apparatus, even when both side portions of the metal plate are formed in a tapered shape, both side portions of the metal plate are gradually changed along the taper by gradually changing the bending forming points on both side portions of each taper shape. It is possible to perform a predetermined bending process.

[0005]

However, in the above-described metal forming apparatus, when the width of the metal plate to be formed is small, the upper die and the lower die also have smaller widths. However, the area of contact with the first drive roll and the second drive roll also becomes small. In such a case, an upper die and a lower die (a metal plate is sandwiched between the upper die and the lower die) are provided between the first roll surface of the first drive roll and the second roll surface of the second drive roll. Hold and hold the upper die by frictional contact between each first roll surface, second roll surface and each upper die, lower die,
Since the lower mold is conveyed, there is a possibility that the upper mold and the lower mold are not normally conveyed. In this way, if the upper and lower molds are not conveyed normally, it will not be possible to accurately mold both sides of the metal plate.
As a result, there is a problem that the quality of the product after molding is deteriorated and the yield of the product is extremely deteriorated.

The present invention has been made to solve the above-mentioned problems of the prior art. The upper die and the lower die for fixing the metal plate are fixedly arranged without using a drive roll. , By moving the two support members supporting the first molding roll and the second molding roll on both sides of each upper mold and lower mold, even if the width of the metal plate is small,
Moreover, it is an object of the present invention to provide a metal plate molding apparatus capable of accurately forming both sides of a metal plate into a predetermined shape, thereby improving product quality and increasing yield.

[0007]

In order to achieve the above object, the present invention provides an upper die having first cam surfaces on both sides and a first metal plate fixing surface at a lower end, and second cam surfaces on both sides. A lower mold having a second metal plate fixing surface at the upper end thereof, a first molding roll abutting against a first cam surface formed on one side of the upper mold, and the upper mold A first support member for supporting a second molding roll that is in contact with a second cam surface formed on the lower die on the same side as the first cam surface is formed; and the first support member. A first urging member for urging the first supporting member so that each of the first molding roll and the second molding roll supported by the pedestal can move back and forth following the first cam surface and the second cam surface, respectively. Means, a first molding roll abutting against a first cam surface formed on the other side of the upper mold, and A second support member for supporting a second molding roll that is in contact with a second cam surface of the lower mold on the same side as the first cam surface of the mold; A second biasing member for urging the second support member so that each of the first molding roll and the second molding roll supported by the support member can move back and forth following the first cam surface and the second cam surface, respectively. Biasing means, first moving means for moving the first supporting member along the longitudinal direction of each of the upper mold and lower mold, and the second supporting member along the longitudinal direction of each of the upper mold and lower mold. And second moving means for moving the first metal plate fixing surface of each of the upper molds and the second metal plate fixing surface of the lower mold to fix the metal plate, and each of the first moving means. And each of the first supporting member and the second supporting member are moved along the longitudinal direction of each of the upper die and the lower die via the second moving means. First support member, a second
While the support member is being moved, the first forming roll and the second forming roll of the first supporting member cooperate with the first forming roll and the second forming roll of the second supporting member to predetermined both sides of the metal plate. It is configured to be shaped into a shape.

[0008]

In the present invention having the above construction, first, the metal plate to be molded is fixedly disposed between the upper mold and the lower mold. After that, the first supporting member and the second supporting member are moved along the longitudinal direction of the upper mold and the lower mold, respectively, via the first moving means and the second moving means. Then, while the first support member and the second support member are moved in this way, the first molding roll and the second molding roll supported by the first support member are urged by the first urging means. Through the first and second cam surfaces of the upper mold and the second cam surface of the lower mold, respectively, and the first molding roll and the second molding roll supported by the second support member are Via the urging force of the urging means, the first cam surface of the upper mold and the second cam surface of the lower mold are respectively followed and moved back and forth.

As described above, while the first forming roll and the second forming roll of each of the first supporting member and the second supporting member are moving back and forth, both sides of the metal plate are provided with the first forming roll and the second forming roll. The metal plate is inserted through a roll and both side portions of the metal plate are molded into a predetermined shape by the cooperation of both the first molding roll and the second molding roll. Thus, the upper mold,
In each of the first support member and the second support member that are moved along the longitudinal direction of the lower mold, the first molding roll follows the first cam surface of the upper mold, and the second molding roll is the lower mold. Since it is capable of advancing and retracting following the second cam surface, even when the bending forming points on both sides of the metal plate continuously change, it is determined by each of the first forming roll and the second forming roll. The bend forming points can be continuously followed and matched with the bend forming points of the metal plate. Therefore, the bend forming points on both sides of the metal plate are formed into a predetermined shape while being changed.

[0010]

EXAMPLE A metal plate molding apparatus according to the present invention will be described below.
A detailed description will be given based on the second and third embodiments with reference to the drawings. First, a metal plate automatic molding line in which the metal plate molding apparatuses according to the first, second and third embodiments are incorporated and used will be described with reference to FIG. FIG. 1 is an explanatory view schematically showing an automatic metal plate molding line. The upper diagram is a plan view of the automatic metal plate molding line, and the lower diagram is a side view of the automatic metal plate molding line.

In FIG. 1, a metal plate K, which is an object to be molded, is wound around an uncoiler 1 in a coil shape, and is supplied from a uncoiler 1 toward a molding device 2 while being drawn out. The metal plate K pulled out from the uncoiler 1 is guided by the guide rolls 3, then passes through the pair of rollers 4, and then the flat surface is smoothed by the two levelers 5.
The metal plate K that has passed through the leveler 5 is cut into a tapered shape through a pair of laser cutters 6 arranged on both sides of the metal plate K. As a result, the unit U having a predetermined taper on both sides is continuously formed on the metal plate K in synchronization with the feeding from the uncoiler 1.

After passing through the laser cutter 6, the flat surface of the metal plate K is smoothed again by the leveler 5, and the metal plate K is supplied to the molding device 2 through the three pairs of feed rollers 7. The molding device 2 is a lower mold 1 fixed on a base 9 placed on a bed 8.
0 and an upper die 12 that faces the lower die 10 and is pressed downward by a press 11 to sandwich and fix the metal plate K between the lower die 10 and the lower die 10.
(The metal plate K is the upper surface of the lower mold 10 and the upper mold 12).
Fixed between the bottom surface of the). When the metal plate K reaches a predetermined position (position where molding can be performed) in the molding apparatus 2, the feeding operation is stopped and the molding apparatus 2 performs predetermined molding processing on both sides of the metal plate K as described later. Be done.

Now, the structure of the molding apparatus 2 according to the first embodiment will be described with reference to the top plan view of FIG. 1, FIG. 2 and FIG. FIG. 2 is an enlarged plan view showing a part of the molding device 2, and FIG. 3 is a partial sectional view of the molding device 2. In these drawings, the molding apparatus 2 has molding units PU arranged on both sides of the upper mold 12 and the lower mold 10. Here, since each molding unit PU has the same configuration, the following description will be given based on one molding unit PU.

The forming unit PU includes a first forming roll 3
There are provided three sets of roll support members 32 for supporting a pair of molding rollers each including 0 and the second molding roll 31.
One end of a pressing rod 33 is fixed to the rear end portion (right end portion in FIG. 3) of each roll support member 32. Each pressing rod 33 is located behind each roll supporting member 32.
It is supported by a rod hole 35 (bearings 36 are arranged on both sides of the rod hole 35) provided in the rod support 34, and the other end of each pressing rod 33 is a hydraulic device 37 (of the rod support 34). It is fixed on the left side).

Here, on both sides of the above-mentioned upper mold 12, there are provided first cam surfaces 12A having a taper having the same inclination as the taper formed on the unit U of the metal plate K, and , The upper mold 12 also on both sides of the lower mold 10.
Similarly, the second cam surface 10A having a taper of the same shape as the unit U of the metal plate K is provided. In addition, the hydraulic devices 37 direct the first forming roll 30 and the second forming roll 31 supported by the roll supporting members 32 via the pressing rods 33 toward the first cam surface 11A and the second cam surface 10A, respectively. As shown in FIG. 3, each of the first molding roll 30 and the second molding roll 31 has a first urging force.
It is always in contact with the cam surface 12A and the second cam surface 10A of the lower mold 10.

The molding surface 30A of each first molding roll 30
(See FIG. 3 etc.) and the molding surface 31A of each second molding roll 31.
Are formed so as to match each other, and when each of the first and second molding rolls 30 and 31 rotates, each molding surface 30
A and 31A cooperate to perform the bending process along the bending points P1 and P2 that continuously change on both sides of the metal plate K (this point will be described later). In addition, as described above, in the molding device 2, three sets of roll support members 32 are provided in the molding unit PU (each roll support member 32 is a molding roller including a first molding roll 30 and a second molding roll 31 as one set). Although the pair is supported), the molding surface 30A of the first molding roll 30 and the molding surface 31A of the second molding roll 31 supported by the respective roll support members 32 coincide with each other. On the other hand, the first molding roll 30 of each roll support member 32 and the molding surface 30 of the second molding roll 31
A and 31A have slightly different shapes for each roll support member 32. Then, by passing the metal plate K between the first molding roll 30 and the second molding roll 31 of each roll support member 32, the metal plate K is gradually bent along the bending molding points P1 and P2 on both sides of the metal plate K. It is a molding process. In this embodiment, three sets of roll supporting members 32 are provided in the molding unit PU, but the number of roll supporting members 32 can be three or more.

Below the rod support 34, as shown in FIG.
As shown in, a pair of rail sliding members 38 are fixed, and a bearing member 39 is fixed between these rail sliding members 38. Each rail sliding member 38
Is slidably fitted to a pair of rails 40 arranged below the rod support member 34, and thus the rod support member 34 is provided with each roll support member 32 and each rail 4 respectively.
It can be slid along zero. Further, below the rod support member 34, between each rail 40, a ball screw 42 rotatably supported by a pair of screw support members 41.
Is provided (see the figure), and one end of this ball screw 42 penetrates one screw support member 41 (the screw support member 41 on the right side in FIG. 2) and is locked by a stopper 43. There is. A driven pulley 44 is fixed to the ball screw 42 between the screw support member 41 and the stopper 43, and between the driven pulley 44 and a drive pulley 46 fixed to one end of a drive shaft 45A of the drive motor 45. Belt 47
Is hung. With the above configuration, each rod support member 34 of the molding unit PU is slid in the left-right direction in FIGS. 1 and 2 along each rail 40 along with each roll support member 32 in accordance with the forward and reverse rotations of the drive motor 45. It is something. At this time, when the rod support member 34 slides,
Each first molding roll 3 supported by each roll support member 32
0 and the second molding roll 31 are moved while being in contact with the first cam surface 12A of the upper mold 12 and the second cam surface 10A of the lower mold 10, respectively. Both sides of the metal plate K sandwiched by the upper mold 12 and the lower mold 10 are moved by the first molding rolls 3 while the metal mold 31 moves.
It is formed into a predetermined shape by the cooperation of 0 and the second forming roll.

After the molding process is completed, the metal plate K is sent further downstream. In this way, the metal plate K is continuously subjected to a predetermined forming process through the forming device 2 in synchronization with the feeding operation. The molding device 2
The detailed operation of will be described later.

After the metal plate K has been subjected to a predetermined molding process by the molding device 2, the metal plate K is pulled out from the drawing roller 13.
Thus, the dust or the like attached to both sides of the metal plate K is removed while being pulled out to the downstream side and passing through the dust removing device 14. The dust removing device 14 blows air on both sides of the metal plate K to remove dust and the like existing on both sides of the metal plate K. The metal plate K whose both surfaces have been cleaned by the dust removing device 14 is coated with an adhesive on the upper surface thereof by the adhesive application device 15 arranged above the metal plate K, and then the heating device. The adhesive applied via 16 is heated. Here, the adhesive application device 15 applies a resin adhesive to the upper surface of the metal plate K in order to attach a vinyl chloride protective film described below to the upper surface of the metal plate K, and the heating device 16 The adhesive applied on the upper surface of the metal plate K by the adhesive applying device 15 is heated and melted to facilitate the attachment of the protective film.

After the adhesive applied to the upper surface is heated and melted as described above, the metal plate K is attached to the protective film sticking device 17
Sent to. The protective film sticking device 17 includes a film forming device 18, a water tank 19 for cooling the protective film F formed by the film forming device 18 with water to form a stable protective film F, and a protective film cooled by the water tank 19. It is composed of a pair of guide rollers 20 for guiding F to the upper surface of the metal plate K, and a pressure roller 21 for pressing the protective film F guided to the upper surface of the metal plate K by the guide roller 20 to the upper surface of the metal plate K. . Here, the film forming device 18 is a device that contains a molten vinyl chloride solution (usually colored black) and forms a protective film by matching the shape of the metal plate K from the vinyl chloride solution. is there. Since this type of protective film molding device 17 is known, its description is omitted here.

Further, the metal plate K passed through the pressure roller 21 is supplied to the tension device 22. The pulling device 22 has a pair of upper and lower pulling belts 23 (each pulling belt 23 is wound around a pair of belt rollers 24), and loosens the metal plate K supplied between the pulling belts 23. In order to solve the problem, the metal plate K is pulled. After that, the metal plate K is cut into a predetermined size by the cutting device 24A.
The cutting of the metal plate K by the cutter 24A is performed while the movement of the metal plate K is stopped by the molding device 2 and the molding process is performed. The metal plate K thus cut by the cutting device 24A is sent to the outside of the metal plate automatic molding line by the sending device 26 having the belt conveyor 25.

Next, the operation of the molding apparatus 2 configured as described above will be described with reference to FIGS. 3 to 5 and 12. FIG. 4 is a partial cross-sectional view of the molding apparatus 2 schematically showing a state where the bending molding process is started along the bending molding point P2, and FIG. 5 is a portion of the molding device 2 schematically showing a state where the bending molding process is finished. 12A is a cross-sectional view, and FIG. 12A is a plan view of the metal plate K before starting the bending process.
12B is a plan view of the metal plate K that has been bent and formed, FIG. 12C is an enlarged end view of the metal plate K that has been bent and formed, as viewed from the side A, and FIG. FIG. 6 is an enlarged end view of the metal plate K after the bending process as seen from the B side.

First, the metal plate K which is the object to be molded will be described with reference to FIG. 12A. The metal plate K is basically formed with the same taper as the upper mold 12 and the lower mold 10. The metal plate K has a shape as described below, and as described later, the bending molding point P1 (determined by the molding surface 30A of each first molding roll 30 and the molding surface 31A of the second molding roll 31 and gradually changing according to the taper). And a bending molding point P2 located inside the bending molding point P1 and parallel to the bending molding point P1 (similar to the bending molding point P1, the molding surface 30A of each first molding roll 30 and the third molding roll 31). (Determined by the molding surface 31A) and the bending surface.

Next, the bending process of the metal plate K will be described. First, after the unit U of the metal plate K that has been pulled out from the uncoiler 1 and cut into a taper shape by the laser cutter 6 is guided onto the lower mold 10 in the molding apparatus 2, the unit U is pressed through the press 11. Lower mold 1
It is clamped and fixed between 0 and the upper mold 12. At this point, the unit U is set in the predetermined molding position, and
In such a set state, both side portions of the unit U extend outward from the first cam surfaces 10A and 12A of the lower mold 10 and the upper mold 12, respectively.

After that, when the drive motor 45 is rotationally driven in a predetermined direction, the ball screw 42 is rotated via the drive pulley 46, the belt 47, and the driven pulley 44, and accordingly, both sides of the lower mold 10 and the upper mold 12 are rotated. The rod supporting members 34 in the above are slidably guided by the rail sliding members 38 and the rails 40 in synchronism with each other, and are moved rightward in FIGS. 1 and 2. During the movement of the rod support member 34, the metal plate K of the metal plate K is passed through the three pairs of molding rolls (consisting of the first molding roll 30 and the second molding roll 31) supported by the roll supporting members 32. Both sides of the unit U are sequentially bent and formed.

At this time, first, the roll supporting member 3
By the cooperation of the molding surface 30A of the first molding roll 30 and the molding surface 31A of the second molding roll 31 in the molding roller pair on the most right side in FIGS. , Bending points P1 on both sides of the unit U
Bend molding is performed at. This molded state is shown in FIG. Here, the molding surface 30A of the first molding roll 30 and the molding surface 31A of the second molding roll 31 coincide with each other to determine the bending molding point P1. During such molding, the first molding roll 30 and the second molding roll 31 are respectively attached to the first cam surface 12A of the upper mold 12 and the second cam surface 10A of the lower mold 10 via the hydraulic device 37 and the pressing rod 33. The first molding rolls 31 and the second molding rolls 31 are in contact with each other at all times.
2A and the second cam surface 10A are followed while moving forward and backward. Therefore, both sides of the unit U are continuously and accurately bent at the bending point P1 by the cooperation of the molding surface 30A of the first molding roll 30 and the molding surface 31A of the second molding roll 31. It is what is done.

Next, in FIG. 1 and FIG. 2, the unit U is formed by the cooperation of the molding surface 30A of the first molding roller 30 and the molding surface 31A of the second molding roller 31 of the molding roller pair arranged at the intermediate position. Bend forming is performed at the bend forming points P2 on both sides of. This molded state is shown in FIG. Here, the molding surface 30A of the first molding roll 30 and the second molding surface 30A
The bending surface 31A of the molding roll 31 is matched with each other to determine the bending molding point P2. During the molding, the first molding roll 30 and the second molding roll 31 are respectively subjected to the first cam surface 12A and the lower mold 10 of the upper mold 12 via the hydraulic device 37 and the pressing rod 33 in the same manner as described above. Of the first molding roll 3 which is always in contact with the second cam surface 10A of the
0 and the second molding roll 31 are respectively formed on the first cam surface 12
A, the second cam surface 10A is followed while moving back and forth. Therefore, the both sides of the unit U are continuously and accurately bent at the bending point P2 by the cooperation of the forming surface 30A of the first forming roll 30 and the forming surface 31A of the second forming roll 31. It is what is done.

Finally, in FIGS. 1 and 2, the molding surface 30A of the first molding roll 30 in the leftmost molding roll pair.
With the cooperation of the molding surface 31A of the second molding roll 31,
The bending process on both sides of the unit U is completed. This state is shown in FIG. Here, the molding surface 30A of the first molding roll 30 and the molding surface 31 of the second molding roll 31
A and B cooperate with each other to form the bending points P1,
P2 is determined, and the final bending process is performed on both sides of the unit U along the bending points P1 and P2. The operation of each of the first molding rolls 30 and the second molding rolls 31 during the molding is the same as the above-mentioned operation, and thus the description thereof is omitted.

The metal plate K, which is formed by continuously forming the units U whose both sides are bent and formed as described above, undergoes a series of steps from the drawing roller 13 to the sending device 26 as described above, and then the metal plate K It is sent out of the automatic molding line. As shown in FIGS. 12 (B), (C), and (D), both sides of the metal plate K, which has been bent and formed as described above, are formed into a tapered shape as well as the original metal plate K. The molding points P1 and P2 are molded so as to have a bent portion Q that is uniformly bent inward.

In the molding apparatus 2 according to the first embodiment, the metal plate K is sandwiched and fixed between the upper mold 12 and the lower mold 10, and the molding units PU are provided on both sides of each upper mold 12 and the lower mold 10.
Via the drive motor 37, ball screw 42, etc.
0, and while the molding unit PU is moving, the first molding roll 30 and the second molding roll 31 are moved.
Since the bending forming process is performed on both sides of the metal plate K in cooperation with the above, even when the width of the metal plate K is small, the bending forming points P1 and P2 of the metal plate K are gradually changed while each bending forming process is performed. Following the points P1 and P2, it is possible to reliably and accurately perform the bending process on both sides of the metal plate K. Further, by incorporating the molding apparatus 2 into the metal plate automatic molding line, the metal plate K can be continuously manufactured.
It is possible to perform the bending forming process.

In the molding unit PU arranged in the above-mentioned molding apparatus 2, three sets of roller supporting members 32 are provided on the rod supporting member 34 (each roller supporting member 32 has different molding surfaces 30A, 31A). A first molding roller 30 and a second molding roller are provided). A second embodiment of the molding unit PU applicable to the molding apparatus 2 will be described with reference to FIG. . FIG. 6 is an explanatory view schematically showing the molding unit according to the second embodiment, in which the molding unit PU is pushed downward toward the lower die 10 and the lower die 10 placed on the base 9. Mold 10
With respect to the upper mold 12 for sandwiching and fixing the metal plate K between
It is arranged on both sides. Since each molding unit PU has the same configuration, only one of them will be described here as an example.

The molding unit PU is roughly classified into a base frame 50.
And a rotary frame 52 rotatably arranged around a support shaft 51 provided on the base frame 50. A support shaft 51 is fixed to the base frame 50, and a cam body 53 having a protruding portion 53A toward the lower mold 10 and the upper mold 12 is fixed to the support shaft 51. A pair of rail sliding members 38 and a bearing member 39 are provided on the lower surface of the base frame 50, as in the rod supporting member 34 described above. Each rail sliding member 38 has a rail 40. And the ball screw 4 is attached to the bearing member 39.
2 is inserted. The molding unit PU is moved via the drive motor 45 and the like when the metal plate K is molded. Further, the rotary frame 52 is formed with four roller support portions 54 around the rotary frame 52, and each roller support portion 54 supports a pair of molding rollers. As a result, the rotary frame 52 supports four pairs of molding rolls via the roller support portions 54.

Next, the supporting structure of the roller pair in each roller supporting portion 54 will be described. Since each support structure has the same structure, one support structure will be described as an example. A shaft body 55 is arranged on the roller support portion 54, and two stoppers 56, 5 are provided on the shaft body 55.
7 is fixed. A roller supporting member 58 is fixed to one end of the shaft body 55 via a stopper 56, and the roller supporting member 58 rotatably supports a roller 59 that contacts the cam surface of the cam body. Further, a stopper 57 is attached to the shaft body 55.
Locking member 6 fixed to abutment and having two insertion holes 60A
0 is provided. A spring 61 is inserted into the shaft body 55 between the locking member 60 and the inner wall of the roller support portion 54, and a shaft 62 is inserted into each insertion hole 60A. The spring 61 biases the locking member 60 toward the support shaft 51.

Two stoppers 6 are provided at both ends of each shaft 62.
3, 64 are fixed, the locking member 60 and the stopper 64
A spring 65 is inserted into each shaft 62 between and. The spring 65 has an urging force opposite to that of the spring 61, and urges the roller support body 66 outward. Further, each shaft 6 is connected via a stopper 64 fixed to each shaft 62.
A roller support 66 is fixed to the roller 2, and the first molding roll 30 and the second molding roll 31 are rotatably attached to the roller support 66 and the molding surfaces 30
A and 31A are arranged so as to coincide with each other.

In the molding unit PU constructed as described above, the rotary frame 52 is intermittently rotated by 90 degrees around the support shaft 51 via a motor (not shown). Further, in each roller support part 54, the combination of each first molding roll 30 and second molding roll 31 arranged on the roller support 66 supported by the two shafts 62 is different for each roller support part 54. They are different from each other, and when they are molded by four pairs of molding rollers, both sides of the metal plate K are shown in FIG.
As shown in (B), (C) and (D), a predetermined bending process is performed. Therefore, in this forming unit PU, a predetermined bending process is performed on both sides of the metal plate K by performing four steps of forming.

Next, a method of bending the metal plate K using the above-mentioned forming unit PU will be described. First, the rotary frame 52 is rotated via a motor (not shown), and the pair of molding rollers used in the first-stage bending process is set at a position facing the lower mold 10 and the upper mold 12.
At this time, according to the rotation of the rotary frame 52, the roller support 5
The roller 59 supported by 8 slides along the cam surface around the cam body 53, and comes into contact with the protruding portion 53A of the cam body 53 when reaching a predetermined position. At this point, the roller support 66 is urged toward the lower die 10 and the upper die 12 with an urging force obtained by subtracting the urging force of the spring 61 from the urging force of the spring 65. The supported first molding roll 30 is in contact with the cam surface 12A of the upper mold 12, and the second molding roll 31 is supported by the covering surface 10A of the lower mold 10.
Is abutted against.

After that, the molding unit PU is moved in the predetermined molding direction along the lower mold 10 and the upper mold 12 while being guided by the rails 40 via the drive motor 37 and the ball screw 4. While the molding unit PU is being moved in this manner, both sides of the metal plate K are on the molding surface 3 of each first molding roll 30.
0A and the molding surface 31A of the second molding roll 31 cooperate with each other to perform the first-stage bending molding process. Further, when performing the second-stage bending process, the rotary frame 52 is rotated by 90 degrees via a motor (not shown), and the forming roller pair used in the second-stage bending process is a lower mold. 10, upper mold 1
It is set at a position facing 2. Then, in the same manner as described above, while the molding unit PU is being moved, the first unit
A second stage bending process is performed on both sides of the metal plate K via the forming roll 30 and the second forming roll 31. After that, similarly, the third stage bending forming process and the fourth stage bending forming process are performed on both sides of the metal plate K. As a result, a predetermined bending process is performed on both sides of the metal plate K, as shown in FIG.

In the molding unit PU in the molding apparatus according to the second embodiment, the rotary frame 52 is intermittently rotated by 90 degrees, so that the pair of molding rollers for bending and molding the metal plate K are successively connected. Since the selection and switching are performed, when performing bending forming on both sides of the metal plate K, even when it is necessary to perform bending forming on a plurality of stages, a larger number of forming roller pairs are used for the rotary frame 5.
It is easy to dispose it on the upper part 2 and, by doing so, it is possible to easily cope with a bending molding process of a plurality of stages. In the molding unit PU, the rotary frame 52
Although the case where four molding roller pairs are arranged in the above is described, it is possible to arrange an arbitrary number of molding roller pairs by changing the shape of the rotary frame 52. , If arranged side by side in the direction along the upper mold 12,
Further, it is possible to perform bending molding processing in multiple stages.

Next, a third embodiment of the metal plate molding apparatus according to the present invention will be described with reference to FIGS. First, the outline of the molding unit PU used in the molding apparatus will be described with reference to FIG. 7. FIG. 7 is an explanatory view schematically showing a forming unit PU used in the forming apparatus of the third embodiment, and this forming unit PU performs a predetermined bending forming process on both sides of the metal plate K in eight steps. is there. As shown in FIG. 7, the molding unit PU is arranged on both sides of the upper mold 12 and the lower mold 10 that sandwich and fix the metal plate K. still,
Since each molding unit PU has the same configuration, one molding unit PU will be described as an example here.

The molding unit PU comprises an upper mold 12 and a lower mold 1 respectively.
From 32 forming roll supporting devices 70 arranged in an oval shape along the length direction of 0, and a cam structure 71 individually provided in the ellipse in which each forming roll supporting device 70 is arranged. Basically composed. Here, each of the 32 forming roll supporting devices 70 is divided into four groups each including eight forming roll supporting devices 70, and each group includes a bending forming process from the first stage to the eighth stage. Eight molding roller pairs are provided for carrying out.

Next, the structures of the molding roll supporting device 70 and the cam structure 71 will be described with reference to FIG. FIG. 8 is a partial cross-sectional view schematically showing the forming roll supporting device 70 in a state where the bending forming process of the metal plate is started along the bending forming point P1, and the forming roll supporting device 70 is
In FIG. 8, two rod holes 73 and each rod hole 7 are provided on the left side wall.
3, a support hole 74 (a bearing 76 is fitted in the support hole 74) is formed, and a support hole 75 corresponding to the support hole 74 (a bearing 77 in the support hole 75 is formed in the center of the left side wall). A support box body 72 is formed. Rail slide members 78 are fixed to both sides of the bottom surface of the support box body 72, and rails 79 laid on the floor are fitted to the rail slide members 78. A chain fixing member 80 is fixed between the rail supporting members 78, and a chain 81 is fixed to the chain fixing member 80. Here, as shown in FIG. 7, each rail 79 is laid according to an oval locus R, and the chain 81 has an oval locus similar to the locus R between the loci R. It is arranged according to C. The chain 81 is driven via a chain drive motor (not shown).

Therefore, in the forming roll supporting device 70, each rail sliding member 78 is slidably guided on the rail 79 by driving the chain 81 via the chain driving motor, and the rail sliding member 78 moves counterclockwise in FIG. It moves on each locus R. Further, the bearing 7 is provided in each of the support holes 74 and 75.
A support rod 82 is supported via 6, 77, and two stoppers 83 (fixed at a substantially central position of the support rod 82) and 84 (the left end portion of the support rod 82 are supported on the support rod 82. Is fixed) is fixed. The stopper 83 has two holes 85A on both sides (each hole 85A).
A locking plate 85 having a bearing 85B is fitted to A is locked, and a return spring 86 is inserted between the locking plate 85 and the inner wall of the support box 72. It is fitted. The return spring 86 urges a roller support member 87, which will be described later, to the right in FIG. 8 to move the cam roller 88 to the cam structure 71.
Has a function of abutting against the cam surface 71A.

Further, a roller support member 87 is fixed to the stopper 84 of the support rod 82, and the roller support member 8
7 is a cam surface 7 formed on one surface of the cam structure 71.
A cam roller 88 that rotates while contacting and following 1A is rotatably attached. Here, the cam surface 71A is
As shown in FIG. 7, the cam structure 71 has an upper mold 12 and a lower mold 1.
It is formed on the surface facing 0. Also, the cam surface 71A
The shape of each of the upper mold 12, the first cam surface 12A of the lower mold 10,
The taper shape formed on the second cam surface 10A is offset, so that each molding roll support device 7 is formed.
0 indicates that when the cam roller 88 moves, the cam roller 88 has the cam structure 71.
Of the upper mold 1 while abutting and following the cam surface 71A of the
2, first cam surface 12A, second cam surface 10A of lower mold 10
Are to be moved according to.

Further, two roller rods 89 are fitted in the rod holes 73 and the holes 85A. A stopper 90 is fixed to the right end of each roller rod 89, and a roll support member 91 is fixed to the left end of each roller rod 89. And the locking plate 8
A pressing spring 92 is inserted into each roller rod 89 between the roller 5 and the roll supporting member 91. The pressing spring 92 biases the roll support member 91 to the left in FIG. 8 to move the first molding roll 30 and the second molding roll 31 supported on the roll support member 91 to the upper mold 12 respectively. The first cam surface 12A and the second cam surface 10A of the lower mold 10 are brought into contact with each other.

The roll support member 91 has two first molding rolls 3 as in the first and second embodiments.
0 and the second molding roll 31 are supported, and the first and second molding rolls 30 and 31 are in contact with the first cam surface 12A of the upper mold 12 and the second cam surface 10A of the lower mold 10, respectively. , A metal plate K formed in a tapered shape in cooperation with each other
The predetermined bending process is performed while gradually changing the bending points P1 and P2 on both sides of the unit U.

Next, the metal forming operation of the forming apparatus according to the third embodiment configured as described above will be described with reference to FIGS. 8 to 12. Here, FIG. 8 corresponds to a state where the bending forming process is started along the bending forming point P1, and FIG. 9 schematically shows a state where the bending forming process is started along the bending forming point P2. 10 is a partial cross-sectional view of the supporting device, FIG. 10 is a partial cross-sectional view of the forming roll supporting device schematically showing a state where the bending forming process is further advanced from the state of FIG. 9, and FIG. 11 is a state showing the bending forming process completed. FIG. 3 is a partial cross-sectional view of the molding roll support device shown in FIG.

First, after the unit U of the metal plate K that has been pulled out from the uncoiler 1 and cut into a taper shape by the laser cutter 6 is guided onto the lower die 10 in the molding apparatus 2, the unit U is pressed. Lower mold 10 through 11
And the upper mold 12 are clamped and fixed. At this point
The unit U is set at a predetermined molding position, and in such a set state, both side parts of the unit U have the lower mold 1
0, the first cam surface 12A of the upper die 12, the second cam surface 10A
Has been extended outward from.

After that, when a drive motor (not shown) is driven in a predetermined direction, the chain 81 moves along the locus C in FIG.
The molding roll supporting device 70 is moved in the counterclockwise direction, and accordingly, each molding roll supporting device 70 is slidably guided by each rail sliding member 78 and each rail 79 to move from the device for performing the bending molding process in the first stage to the first device. The rails 79 are sequentially moved along the locus R of each rail 79 up to an apparatus for performing 8-step bending. While each molding roll supporting device 70 is moved in this manner, both sides of the unit U of the metal plate K are passed through each molding roll pair (each consisting of the first molding roll 30 and the second molding roll 31). Are sequentially bent and formed.

At this time, first, of the pair of molding rolls supported by each roll supporting device 70, the molding surface 30A of the first molding roll 30 in the pair of molding rolls for performing the first-stage bending molding process. In cooperation with the forming surface 31A of the second forming roll 31, the bending forming process is performed at the bending forming points P1 on both sides of the unit U. This molded state is shown in FIG. Here, the molding surface 30A of the first molding roll 30 and the molding surface 31 of the second molding roll 31
A and B are matched with each other to determine the bending molding point P1. During the molding, the cam roller 88 of the first molding roll 30 and the second molding roll 31 is the cam structure 71.
Of the pressing spring 92 while contacting and following the cam surface 71A of
Presses the roll support member 91 toward the upper die 12 and the lower die 10, so that the first cam surface 1 of the upper die 12 respectively.
2A, which is always in contact with the second cam surface 10A of the lower mold 10, and from which the first molding roll and the second molding roll 31 are
Move forward and backward while following the first cam surface 12A and the second cam surface 10A, respectively. Therefore, both sides of the unit U are
By the cooperation of the molding surface 30A of the molding roll 30 and the molding surface 31A of the second molding roll 31, the bending molding process is performed continuously and accurately at the bending molding point P1.

After the bending process at the bending points P1 on both sides of the unit U is performed in two or three stages as described above, the bending process is then performed along the bending points P2. This molded state is shown in FIG. Here, the molding surface 30 of the first molding roll 30
A and the molding surface 31A of the second molding roll 31 match each other to determine the bending molding point P2. During such molding, each of the first molding roll 30 and the second molding roll 31
Is always in contact with the first cam surface 12A of the upper mold 12 and the second cam surface 10A of the lower mold 10 in the same manner as described above, so that the first molding roll and the second molding roll 31 are respectively connected to the first cam. It moves forward and backward while following the surface 12A and the second cam surface 10A. Therefore, both sides of the unit U have the first forming roll 3
0 molding surface 30A and second molding roll 31 molding surface 31A
In cooperation with the above, the bending forming process is performed continuously and accurately at the bending forming point P2. When the bending forming process at the bending forming point P2 further progresses, the state shown in FIG. 10 is obtained, and at this point, the bending forming process of the seventh stage is completed.

Finally, the final bending process is performed by the roll supporting device 70 which supports the pair of forming rolls for performing the bending process of the eighth stage, whereby the bending processes on both sides of the unit U are performed. Complete. This state is shown in FIG. Here, the first molding roll 30
And the molding surface 31A of the second molding roll 31 cooperate with each other to form the bending molding points P1 and P2.
And the bending points P on both sides of the unit U.
The final bending process is carried out along P1 and P2. The operation of each of the first molding rolls 30 and the second molding rolls 31 during the molding is the same as the above-mentioned operation, and thus the description thereof is omitted.

The metal plate K, which is formed by continuously forming the units U whose both sides are bent and formed as described above, undergoes a series of steps from the drawing roller 13 to the feeding device 26 as described above, and then, the metal plate K. It is sent out of the automatic molding line. As shown in FIGS. 12 (B), (C), and (D), both sides of the metal plate K, which has been bent and formed as described above, are formed into a tapered shape as well as the original metal plate K. The molding points P1 and P2 are molded so as to have a bent portion Q that is uniformly bent inward.

Also in the molding apparatus according to the third embodiment, the metal plate K is sandwiched and fixed between the upper die 12 and the lower die 10 as in the first embodiment, and each upper die 12 and the lower die 10 are fixed. Forming unit PU with motor and chain 81 on both sides of 10
The molding unit PU is moved along the rail 79 through the above-mentioned parts, and the bending molding process is performed on both sides of the metal plate K by the cooperation of the first molding roll 30 and the second molding roll 31 while the molding unit PU is moving. Since this is performed, even when the width of the metal plate K is small, the bending forming points P1 and P2 of the metal plate K are gradually changed while the bending forming points P1 and P2 are gradually changed.
It is possible to reliably and accurately perform the bending process on both sides of the metal plate K, following P1 and P2.

Further, by incorporating such a forming apparatus into an automatic metal plate forming line, it becomes possible to continuously perform bending forming of the metal plate K.
It is similar to the embodiment. As described in detail above, in the metal plate molding apparatuses according to the first, second, and third examples, the width of the metal plate K in the unit U is small, and
Even when the taper is formed on both sides of the unit U and the bending molding points P1 and P2 are gradually changed, the unit U is fixed between the upper mold 12 and the lower mold 10, and the molding units PU are connected to the upper molds. 12. Since the bending process is performed while moving on both sides of the lower mold 10, the bending process can be performed reliably and accurately along the bending points P1 and P2.

[0055]

As described above, according to the present invention, the upper die and the lower die for fixing the metal plate are fixedly arranged without using the drive roll, and both the upper die and the lower die are provided. First
By moving the two support members that support the forming roll and the second forming roll, it is possible to reliably and accurately form both sides of the metal plate into a predetermined shape even when the width of the metal plate is small. Therefore, it is possible to provide a metal plate molding apparatus capable of improving the quality of products and increasing the yield.

[Brief description of drawings]

FIG. 1 is an explanatory view schematically showing a metal plate automatic molding line.

FIG. 2 is an enlarged plan view showing a part of the molding apparatus.

FIG. 3 is a partial cross-sectional view of the molding apparatus according to the first embodiment showing a state in which the bending process of the metal plate has started along the bending point P1.

FIG. 4 is a partial cross-sectional view of the molding apparatus according to the first embodiment showing a state in which the bending process of the metal plate has started along the bending point P2.

FIG. 5 is a partial cross-sectional view of the molding apparatus according to the first embodiment showing a state where the bending molding process has been completed.

FIG. 6 is an explanatory view schematically showing a molding unit according to a second embodiment.

FIG. 7 is an explanatory view schematically showing a molding unit used in the molding apparatus according to the third embodiment.

FIG. 8 is a partial cross-sectional view of the molding roll supporting device according to the third embodiment, showing a state where the bending process of the metal plate is started along the bending point P1.

FIG. 9 is a partial cross-sectional view of the forming roll support device according to the third embodiment, showing a state where the bending forming process of the metal plate is started along the bending forming point P2.

FIG. 10 is a partial cross-sectional view of the molding roll support device according to the third embodiment, schematically showing a state in which the bending molding process is further advanced from the state of FIG.

FIG. 11 is a partial cross-sectional view of the molding roll support device according to the third embodiment, which schematically shows a state in which the bending process has been completed.

FIG. 12 is an explanatory view showing a metal plate that has been subjected to a bending process, FIG. 12 (A) is a plan view of the metal plate before starting the bending process, and FIG. 12 (B) shows the bending process. 12C is a plan view of the completed metal plate, FIG. 12C is an enlarged end view of the metal plate that has been bent and formed, as viewed from the side A.
FIG. 12D is an enlarged end view showing the metal plate which has been bent and formed, as viewed from the B side.

[Explanation of symbols]

10 ... Lower mold, 10A ... Second cam surface, 12 ...
Upper mold, 12A ... First cam surface, 30 ... First molding roll, 31 ... Second molding roll, 32 ... Roll support member, 37 ... Hydraulic device, 38 ... Rail Sliding member, 39 ... Bearing member, 40 ... Rail, 42 ...
..Ball screw, 45 ... Drive motor, K ... Metal plate, P1, P2 ... Bending molding point, PU ... Molding unit

Claims (1)

[Claims] 1. An upper die having first cam surfaces formed on both sides and a first metal plate fixing surface at a lower end, and second cam surfaces formed on both sides and a second metal plate fixing surface at an upper end. A lower mold, a first molding roll that is in contact with a first cam surface formed on one side of the upper mold, and the same side as the side on which the first cam surface of the upper mold is formed. A first support member for supporting a second molding roll that is in contact with a second cam surface formed on the lower mold, and first and second molding rolls supported by the first support member. Is formed on the other side of the upper die, and a first urging means for urging the first support member so as to be capable of advancing and retracting following the first cam surface and the second cam surface, respectively. A first molding roll abutting on the first cam surface, and the same side on which the first cam surface of the upper die is formed, A second support member that supports a second molding roll that is in contact with a second cam surface formed on the lower mold; and a first molding roll and a second molding roll that are supported by the second support member. Second urging means for urging the second support member so as to be able to advance and retreat following the first cam surface and the second cam surface, respectively, and the first support member for the upper mold and the lower mold. A first moving means for moving along the longitudinal direction of the mold, and a second moving means for moving the second support member along the longitudinal direction of the upper mold and the lower mold, 1 fix the metal plate between the metal plate fixing surface and the second metal plate fixing surface of the lower mold, and
The first support member and the second support member via the moving means and the second moving means.
Move the support member along the longitudinal direction of each upper mold, lower mold,
While each of the first support member and the second support member is being moved,
The first forming roll and the second forming roll of the first supporting member cooperate with the first forming roll and the second forming roll of the second supporting member to form both sides of the metal plate into a predetermined shape. Metal plate forming equipment.