JPH0377014B2 - - Google Patents

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention bends a plate material such as a metal plate, a synthetic resin plate, etc. into a cylinder, a cone, an ellipse, and each end using three rolls. It is related to the device.

(Prior Art) A conventional three-roll bending roll device consists of two parallel lower rolls with a fixed interval and an upper roll whose vertical position is adjustable.
The spacing between the bottom rolls of books was not adjustable.

Therefore, the conventional three-roll bending roll device can handle cylindrical bending with a single curvature and end bending, but it can handle cylindrical bending with different curvatures, conical bending with different curvatures on the left and right sides of the roll, It has been difficult to perform elliptical bending in which the curvature changes along the circumference. Further, Japanese Utility Model Publication No. 40-34600 discloses a cone manufacturing apparatus in which both ends of an upper roll can be moved up and down independently, and bearings at both ends of a pair of lower rolls can be moved horizontally independently. There is. Japanese Unexamined Patent Publication 1977-
Japanese Patent No. 4060 discloses a bending roll device in which one end of a lower roll can be raised and lowered simultaneously to tilt the lower roll.

However, the bending device disclosed in JP-A No. 51-4060 can only tilt the pair of lower rolls at the same time, and the lower rolls cannot be tilted to different inclinations, resulting in less flexibility in the bending operation. Ta. Even if the cone manufacturing device disclosed in Japanese Utility Model Publication No. 40-34600 is combined with the bending device disclosed in Japanese Unexamined Patent Publication No. 51-4060, the roll movement mechanism of the former would be a one-degree-of-freedom movement mechanism for one bearing part and one screw shaft. On the other hand, the lower roll moving mechanism in the latter publication only moves up and down in the vertical direction, and since the mechanisms are different, it is difficult to combine the two. It is not easy to freely drive left, right, front and back. Furthermore, even if the screw shaft of the former publication is changed from being driven manually to being driven by a motor, there is a problem in that four motors are required, resulting in a large number of motors and an increase in cost.

(Problem to be Solved by the Invention) The problem to be solved by the present invention is to improve the conventional bending roll device so that each bearing part of a pair of front and rear lower rolls can be moved independently vertically and horizontally. By freely changing the spacing and inclination of the rolls, a variety of roll processing can be performed.Moreover, the number of motors needed to move the lower roll can be reduced, allowing for cylindrical bending with different curvatures, and with different curvatures on the left and right sides of the rolls. To provide a three-roll bending roll device capable of performing conical bending, elliptical bending in which the curvature changes along the circumference, etc. with one unit.

(Means for Solving the Problem) The gist of the present invention that solves the problem is to insert a plate material between an upper roll and a pair of front and rear lower rolls, and bend the plate material by rotating the rolls. In the device, the left and right bearings of each lower roll can be raised and lowered by separate cylinders, and
The cylinder is movable in the front-back direction, and the lower parts of the cylinder are screwed together with threaded shafts installed in the front-back direction, and the opposite ends of the pair of front and rear threaded shafts on the same left and right sides are connected so that they can be interlocked with each other using a clutch. The bending roll device is characterized in that one of the threaded shafts connected with the clutch is driven by a motor, and furthermore, the left and right bearing portions of the upper roll can be raised and lowered by cylinders.

(Function) In the present invention, the interval between the two lower rolls can be changed by moving the two lower rolls in the front-rear direction while maintaining their parallelism in the four bearing portions at both ends of the two lower rolls. The upper roll can also be moved vertically while maintaining parallelism, so
The curvature of the plate material can be freely changed and formed using the upper roll and the two lower rolls.

Therefore, cylindrical bending and elliptical bending with various curvatures can be performed. In addition, the four bearings at both ends of the two lower rolls can move vertically while maintaining parallelism, so when performing end bending in cylindrical and elliptical bending, the lower rolls in front of you can be moved slightly. By arranging the upper roll and placing the lower roll below the upper roll, the end bending work can be performed accurately.

Next, by changing the amount of movement in the front-back direction of the four bearings at both ends of the two bottom rolls, the distance between the bottom rolls is made different on the left and right sides, and the two bottom rolls are By arranging the rollers in a letter shape and operating the upper roll horizontally or in an inclined state, conical bending can be performed. In this case as well, the four bearings at both ends of the two lower rolls can move up and down independently, so when performing end bending in conical bending, the lower roll in front is placed slightly upward. However, by arranging the rear lower roll under the upper roll, the end bending work can be performed accurately. Furthermore, each bearing at the end of the lower roll is raised and lowered by an independent cylinder, and by rotating a threaded shaft, the cylinder screwed therewith is moved horizontally. Moreover, since the threaded shafts are interlocked via a clutch, the bearings of the front and rear lower rolls can be horizontally moved independently using only one motor provided on one of the threaded shafts.

(Example) Hereinafter, an example of the present invention will be described based on the drawings.

Figure 1 is a front view of the embodiment, Figure 2 is A of Figure 1.
- Explanatory diagram of the drive part in A, Figure 3 is B in Figure 1
-B is an explanatory view, Fig. 4 is an explanatory view taken along C-C in Fig. 1, explanatory view taken along D-D in Figs. It is a diagram.

Figure 8 is a perspective view of the cylindrical product, Figure 9 is a plan view showing the arrangement of rolls, and Figures 10, 11, and 12.
The figure is an explanatory diagram showing the arrangement of the rolls seen from the side.

Figure 13 is a perspective view showing an elliptical product;
FIG. 5 is an explanatory diagram showing the arrangement of the rolls seen from the side.

Fig. 16 is an explanatory diagram showing a conical product, Fig. 17 is a plan view showing the arrangement of the rolls, Fig. 18 is a front view showing the arrangement of the rolls, and Figs. 19 and 20 show the arrangement of the rolls seen from the side. It is an explanatory diagram.

Fig. 21 is an explanatory diagram of corrugated flat plate bending, Fig. 22 is an explanatory diagram of corrugated cylindrical bending, Figs. 23 and 24 are explanatory diagrams of spherical concave bending, and Fig. 25 is an explanatory diagram of spherical convex bending. .

In this embodiment, the left and right bearings 2 and 3 of the upper roll 1 are
can move up and down independently, and the four bearings 6, 7, 8, 9 at both ends of the pair of front and rear lower rolls 4, 5
are also independently movable in the front-back direction and the up-down direction. And upper roll 1 and lower roll 4, 5
A plate is inserted between the two, and three rolls are rotated to bend the plate.

Hydraulic cylinders 10 and 1 are used to independently move the left and right bearing parts 2 and 3 of the upper roll 1 in the vertical direction.
1 is provided. Figure 5 shows the bearing part 3 on the right side of the upper roll 1 in a lowered state, and Figure 6 shows the bearing part 3 on the right side of the upper roll 1.
It shows a state where it has risen.

In order to move the bearing parts 6, 8 of the lower rolls 4, 5 back and forth, as shown in FIG. 4, threaded shafts 13, 14 are provided to transmit the rotation of the motor 12 with a reduction gear. Since the threaded shafts 13 and 14 can be connected and disconnected by the clutch 15, when the clutch 15 is opened and the motor 12 with a reduction gear is operated, only the bearing portion 8 of the lower roll 5 is rotated in the front-rear direction. When the clutch 15 is closed and the motor 12 with a speed reducer is operated, the bearings 6 and 8 of the lower rolls 4 and 5 are moved together in the front and back direction. Movement is oilless slide shifter 35,
36. Since the mechanism shown in FIG. 4 is also provided in the section FF in FIG. 1, the bearings 7 and 9 of the lower rolls 4 and 5 can also be moved in the front-back direction in the same way.

In order to move the bearing parts 6, 8 of the lower rolls 4, 5 up and down, four hydraulic cylinders 16 are provided as shown in FIG. 4. By moving the bearing plates 17 and 18 independently in the vertical direction using two hydraulic cylinders 16, the bearing portions 6 and 8 of the lower rolls 4 and 5 are independently moved in the vertical direction. The mechanism shown in Fig. 4 is
-Since it is also provided in the F part, the lower rolls 4 and 5
Similarly, the bearing parts 7 and 9 of the four hydraulic cylinders 1
9, it can be moved up and down.

In this embodiment, as shown in FIG. 1, the right frame 20 can be tilted outward from the hydraulic cylinder 21. This is a mechanism for removing the product from the apparatus when the apparatus of this embodiment forms a plate material and finishes it into a cylindrical product. When the frame 20 is overturned, the upper roll 1
Since the right end of the mold is exposed, the cylindrical product after molding can be pulled out from this part. During the molding operation, the frame 20 stands upright and is locked with a threaded boss 22.

Drive motor 2 for upper roll 1 and lower rolls 4 and 5
Since power is transmitted from roller 3 through the telescopic universal joint 24, power can be reliably transmitted no matter where the bearings 2, 6, and 8 of the three rolls are located. FIG. 2 is an explanatory view of the drive section taken along line A-A in FIG.
This shows the combination with

When the plate material 26 is bent to form a cylindrical product 25 as shown in FIG. 8 using the apparatus of this embodiment, the upper roll 1 and the lower rolls 4 and 5 are parallel to each other and spaced apart from each other by a predetermined distance, as shown in FIG. Molding is carried out in a state where the The spacing between the three rolls is adjusted according to the diameter of the cylindrical product 25, but in the case of a cylindrical product with a small diameter, the spacing between the upper roll 1 and the lower rolls 4 and 5 is arranged narrowly as shown in FIG. Then, the plate material 26 is formed. In the case of end bending of the plate material 26, as shown in FIG. 11, the lower roll 5 is placed directly below the upper roll 1, and the lower roll 4 is placed slightly above the lower roll 5 to form the plate material. In the case of a cylindrical product with a large diameter, the plate material 26 is formed by arranging the lower rolls 4, 5 with a slightly wider interval as shown in FIG.

Next, when the plate material 30 is bent to form an elliptical product 27 as shown in FIG. 13, the upper roll 1 and lower rolls 4 and 5 are arranged as shown in FIGS. 14 and 15 for forming. When performing end bending and _R1 bending 28 of the plate material 30, as shown in FIG _.
When bending 29 is performed, as shown in FIG. 15, the lower rolls 4 and 5 are arranged with a wider interval and moved slightly upward, and the forming is performed.

Next, when the plate material 32 is bent and formed into a conical product 31 as shown in FIG. 16, the lower rolls 4 and 5 are arranged in a V-shape when viewed from above as shown in FIG. I do. In this case, upper roll 1
The lower rolls 4 and 5 are arranged horizontally as shown in FIG. 18 when viewed from the front. The small diameter portion 33 of the conical product 31 has a V-shaped lower roll 4,
The large diameter part 34 of the conical product 31 is formed in the part where the interval between the V-shaped lower rolls 4 and 5 is wide. In this case, the arrangement of the rolls seen from the side is as shown in Fig. 20, and the plate material 32' of the small diameter portion 33 is formed by the lower rolls 4' and 5' with a narrower interval, and the large diameter portion is formed by the lower rolls 4' and 5'. The plate material 32 of No. 34 is formed by using lower rolls 4 and 5 with a wide interval between them. When bending the end of the plate material 32, as shown in FIG.
is arranged directly below the upper roll 1, and the lower roll 4 is arranged slightly above the lower roll 5 so as to form a V-shape with the lower roll 5, and molding is performed. In this case, the plate material 32' of the small diameter portion 33 is formed by the lower rolls 4', 5' with a narrower interval, and the plate material 32 of the larger diameter portion 34 is formed by the lower rolls 4, 5 with a wider interval. I'm starting to do that.

In the present invention, by attaching molds of various shapes to the upper roll 1 and lower rolls 4 and 5, products of various shapes can be molded.

FIG. 21 shows how a corrugated flat plate is bent using an apparatus in which the surfaces of the upper roll 1 and the lower rolls 4 and 5 are made corrugated.

FIG. 22 shows how a corrugated flat plate is further bent into a corrugated cylinder.

FIGS. 23 and 24 show how spherical concave bending is performed using an apparatus in which the upper roll 1 is made concave and the lower rolls 4 and 5 are made convex.

FIG. 25 shows the state of spherical convex bending using an apparatus in which the upper roll 1 is made convex and the lower rolls 4 and 5 are made concave.

It is also possible to form other shapes with the apparatus of the present invention by using a mold suitable for the shape.

(Effects of the Invention) According to the present invention, it is possible to perform cylindrical bending with different curvatures, cylindrical bending with different curvatures on the left and right sides of the roll, elliptical bending with curvatures that change along the circumference, etc. with one machine, Furthermore, by attaching various molds to the roll, it is possible to provide a bending roll device that can bend products of various shapes. In addition, since the screw shaft for horizontally moving the pair of front and rear cylinders for raising and lowering the lower roll is interlocked via a clutch, the number of motors for moving the rolls can be reduced, and manufacturing costs can be reduced.

[Brief explanation of drawings]

Figure 1 is a front view of the embodiment, Figure 2 is A of Figure 1.
- Explanatory diagram of the drive part in A, Figure 3 is B in Figure 1
-B, FIG. 4 is an explanatory diagram of C-C in FIG. 1, FIGS. 5 and 6 are explanatory diagrams of D-D in FIG. It is a partially cutaway sectional view. FIG. 8 is a perspective view of the cylindrical product, FIG. 9 is a plan view showing the arrangement of the rolls, and FIGS. 10, 11, and 12 are explanatory views showing the arrangement of the rolls viewed from the side. FIG. 13 is a perspective view showing an elliptical product, and FIGS. 14 and 15 are explanatory views showing the arrangement of rolls viewed from the side. Fig. 16 is an explanatory diagram showing a conical product, Fig. 17 is a plan view showing the arrangement of the rolls, Fig. 18 is a front view showing the arrangement of the rolls, and Figs. 19 and 20 show the arrangement of the rolls seen from the side. It is an explanatory diagram. Fig. 21 is an explanatory diagram of corrugated flat plate bending, Fig. 22 is an explanatory diagram of corrugated cylindrical bending,
3 and 24 are explanatory diagrams of spherical concave bending, and FIG. 25 is an explanatory diagram of spherical convex bending. 1: Upper roll, 2, 3: Bearing part, 4, 5, 4',
5': Lower roll, 6, 7, 8, 9: Bearing part, 10,
11: Hydraulic cylinder, 12: Motor with reducer,
13, 14: Threaded shaft, 15: Clutch, 16,
19: Hydraulic cylinder, 17, 18: Bearing plate, 2
0: Frame, 21: Hydraulic cylinder, 22: Threaded boss, 23: Drive motor, 24: Telescopic universal joint, 25: Cylindrical product, 26: Plate material, 27: Oval product, 28: R ₁ bend, 29: R ₂
Bending, 30: Plate material, 31: Conical product, 32,3
2': Plate material, 33: Small diameter part, 34: Large diameter part, 35, 36: Oilless slide shifter,
37: Drive gear, 38: Upper roll rotation gear, 3
9: Lower roll rotation gear.

Claims (1)

[Claims] 1. In a device that inserts a plate material between an upper roll and a pair of front and rear lower rolls, and bends the plate material by rotating the rolls, the left and right bearings of each lower roll are connected to separate cylinders. In addition to being able to move up and down, the cylinder is also movable in the front-rear direction, and each lower part of the cylinder is screwed onto a threaded shaft installed in the front-rear direction, and the opposite ends of the pair of front and rear threaded shafts on the same left and right sides are connected to each other. A bending roll device that is interlockably connected by a clutch, one of the threaded shafts connected by the clutch is driven by a motor, and furthermore, each of the left and right bearing parts of the upper roll can be raised and lowered by a cylinder.