JPH0716717B2 - Thin plate forming method and apparatus - Google Patents

Description

TECHNICAL FIELD The present invention relates to a method and apparatus for forming a thin plate of metal, synthetic resin or the like.

[Prior Art] Conventionally, frames for hoddies or roofs for vehicles, ships, aircraft, etc., panels for home electric appliances, etc. have been subjected to draw forming by a press device or bend forming by a bending device to obtain a desired shape. Has been granted.

[Problems to be Solved by the Invention] However, in the forming method performed by using the conventional press device, bending device, and roll forming device,
There is a problem like this.

Since it is necessary to apply a large molding force to the material, the device configuration becomes large.

It is necessary to use a different mold every time the shape of the molded product is changed, which increases the tool cost.

It is necessary to use a different press device or bending device depending on the shape of the molded product.

When performing complex molding such as drawing and bending on a molded product, it is necessary to provide a press device and a bending device together and handle the material between them.

It is an object of the present invention to enable large molding with a small molding force, and to mold molded products of various forms with the same device and tool.

Another object of the present invention is to make it possible to easily perform complex molding such as drawing and bending on a molded product with a simple device configuration.

[Means for Solving the Problems] In the molding method according to the present invention as set forth in claim 1, tension is applied to the thin plate by a pair of clampers that clamp the opposite sides of the thin plate via a region to be molded. A method for forming a thin plate, which comprises pressing a forming roll against a region to be formed of the thin plate and making the tension applied to one side of the thin plate larger than the tension applied to the other side while pulling and moving the thin plate. The forming roll is adapted to be partially pressed against the entire plate width in the direction orthogonal to the pass line of the thin plate.

In the molding method according to the second aspect of the present invention, tension is applied to the thin plate by a pair of clampers that clamp the opposite sides of the thin plate via the molding region of the thin plate, and the molding roll is applied to the molding region of the thin plate. A method for forming a thin plate, which comprises pressing the thin plate to one side of the thin plate so that the tension applied to the other side of the thin plate is larger than the tension applied to the other side of the thin plate, the tension being applied to one side of the thin plate. The direction of is adjusted.

A molding apparatus according to a third aspect of the present invention is a molding apparatus according to the present invention, wherein a first clamper and a second clamper are installed to face each other in a direction along a pass line of a thin plate, and an intermediate portion sandwiched between the first and second clampers. The forming roll device installed in the area, the first and second clampers, and the forming roll device are controlled to clamp both opposing sides in the direction along the pass line of the thin plate through the region to be formed of the thin plate. Tension is applied to the thin plate by the first and second clampers, the forming roll of the forming roll device is pressed against the region to be formed of the thin plate, and the tension applied by the first clamper to one side of the thin plate. ,
What is claimed is: 1. A thin plate forming apparatus, comprising: a control device capable of forming while the second clamper applies tension to the other side of the thin plate so that the thin plate is pulled and moved. The control device further includes third and fourth clampers that are installed opposite to each other in a direction orthogonal to the pass line, and the control device controls the third and fourth clampers and the third and fourth clampers when the thin plate is stretch-formed by the roll device. The fourth clamper is moved in the pass line direction of the thin plate in synchronization with the movement of the thin plate, and the third and fourth parts are also provided on both sides facing each other in the direction orthogonal to the pass line of the thin plate through the molding region of the thin plate. The tension can be added by a clamper.

A thin plate forming apparatus according to a fourth aspect of the present invention is sandwiched between first and second clampers, which are installed to face each other in a direction along a path line of the thin plate, and the first and second clampers. The forming roll device installed in the intermediate region, the first and second clampers, and the forming roll device are controlled to clamp both opposite sides in the direction along the pass line of the thin plate through the region to be formed of the thin plate. Tension is applied to the thin plate by the first and second clampers, the forming roll of the forming roll device is pressed against the molding region of the thin plate, and the tension applied by the first clamper to one side of the thin plate. Is a device for forming a thin plate configured to include a control device capable of forming the thin plate while pulling and moving the thin plate by making the tension larger than the tension applied to the other side of the thin plate by the second clamper, Up In which the first tensioning device has to be able to adjust the direction of the tension applied to one side of the sheet.

[Operation] According to the present invention described in claim 1, there are the following operations.

Since the thin plate is subjected to a forming process with a forming roll in a state where tension is applied, a large forming can be performed with a small forming force. This also means that the device configuration can be downsized. At this time, the means for applying tension to the thin plate is a pair of clampers,
Tension can be surely applied to a thin plate without giving it a slip flaw.

Since the thin plate is subjected to the forming process by the forming roll while being given tension by the difference in tension between the pair of clampers and being pulled and moved, the thin plate can be formed into any form from short to long by adjusting the pulling movement length. Can also handle. Therefore, the tension applying function of the tension applying means can also be used as the thin plate moving device, and it is not necessary to provide a complicated additional mechanism for moving the forming roll in order to correspond to the long forming of the thin plate. Further, by adjusting the pressure contact position of the forming roll with respect to the thin plate in the vertical and horizontal directions, or by using a plurality of forming rolls in multiple stages, it is possible to form articles of various forms. That is, it is possible to mold various types of molded products with the same device and tool.

The forming roll is partially pressed against the entire plate width in the direction orthogonal to the pass line of the thin plate. Therefore, so-called string forming (see FIGS. 13 to 15) can be performed in which a part of the thin plate in the plate width direction is drawn.

According to the present invention described in claim 3, in addition to the above actions, the following actions are provided.

By having the first to fourth clampers, the thin plate can be formed while exerting tension from the four surfaces of the thin plate, and the formability of the thin plate can be improved.

According to the present invention as set forth in claims 2 and 4, in addition to the above actions, there are the following actions.

It is possible to apply bending to the thin plate by pressing the molding roll while pressing to form a drawing and adjusting the direction of the tension applied to one side of the product at the same time. Become. That is, the molded product can be easily subjected to complex molding such as drawing and bending with a simple device.

[Examples] FIG. 1 is a front view showing an example of a molding apparatus according to the present invention, FIG. 2 is a half plan view of FIG. 1, FIG. 3 is a side view of FIG. 1, and FIG. FIG. 5 is a schematic view showing a tension applied state in the X direction by FIG. 5, FIG. 5 is a schematic view showing a tension applied state in the X and Y directions by pulling movement, and FIG. 6 is a schematic diagram showing another tension applied state in the X direction by a tensioning device. FIG. 7 is a schematic diagram showing another X and Y direction tension application state by a tensioning device, FIG. 8 is a schematic diagram showing a forming roll device, FIG. 9 is a schematic diagram showing a forming state by adjusting the vertical position of the forming roll, FIG. 10 is a schematic diagram showing a molding state by adjusting the lateral position of the molding roll, FIG. 11 is a schematic diagram showing a molding state by a multi-stage arrangement of the molding rolls, and FIG. 12 is a schematic diagram showing a heating structure of the molding roll, Figure 13 is a schematic diagram showing an example of the molded product,
FIG. 14 is a schematic diagram showing short and long molded products, and FIG. 15 is a schematic diagram showing a composite molded product.

As shown in FIGS. 1 to 3, the molding device 10 includes a mount 11 and
First tension device 12, second tension device 13, forming roll device
14 and the control device 15.

At this time, the first tensioning device 12 and the second tensioning device 13 are installed opposite to each other, and the forming roll device is installed in an intermediate region sandwiched between the two tensioning devices 12 and 13. Then, the control device 15 controls both the tension devices 12, 13 and the forming roll device 14, and the thin plate 17
Both of the above tension devices on both sides facing each other through the molding area of 1
Tension is applied by 2, 13 to press the upper and lower forming rolls of the forming roll device 14 to the region to be formed of the thin plate 17 while applying the tension applied to the one side of the thin plate 17 by the first tensioning device 12. The tension applied to the other side of the thin plate 17 by the second tensioning device 13 is larger than that of the thin plate 17.
To enable tensile molding.

At this time, the upper and lower forming rolls of the forming roll device 14 are partially brought into pressure contact with the entire plate width of the thin plate 17 in the direction orthogonal to the pass line. As a result, so-called string forming (see FIGS. 13 to 15) can be performed in which a part of the thin plate 17 in the plate width direction is drawn.

Hereinafter, (A) a tension applying method using the tension devices 12 and 13, (B) a pressure welding method using the forming roll device 14, (C) a tension forming method using the first tension device 12, and (D) a processing example of a molded product. Will be described.

(A) Method of applying tension The first tension device 12 and the second tension device 13 of the molding device 10 are
As shown in FIGS. 4 (A) and 4 (B), fluid pressure cylinder devices 21 and 22 installed so as to face each other on a path line along the molding direction of the thin plate 17, and these cylinder devices 21 and 22. It is composed of clampers 23 and 24 arranged at the tip of the piston rod. Each clamper 23, 24 is configured by incorporating a short hydraulic cylinder device, and can clamp both opposite edges of the thin plate 17, that is, both tensioning devices 12, 13 are thin plates by the clampers 23, 24. Tension can be applied to the thin plate 17 by clamping both opposite edges of the 17 and then activating the cylinder devices 21 and 22 thereof.

In addition, in the embodiment of the present invention, the forming apparatus 10 is provided on the line orthogonal to the pass line of the thin plate 17 in addition to the tensioning devices 12 and 13 as shown in FIGS. The third and fourth pulling devices 25 and 26 may be provided. These tension devices 25 and 26 are also fluid cylinder devices.
27, 28 and clampers 29, 30. This time,
The third and fourth tensioning devices 25 and 26 can be reciprocated so as to move from the original position in the pass line direction of the thin plate 17 in synchronization with the movement of the thin plate 17 and then return to the original position. When using the first to fourth tensioning devices 12, 13, 25, 26, both tensioning devices 1
2 and 13 apply tension to the thin plate 17 in the X direction, and tension devices 25 and 26 apply tension to the thin plate 17 in the Y direction. As a result, tension is applied from the four sides of the thin plate 17 to form the thin plate 17. You can improve the property.

Further, in the practice of the present invention, when the thin plate 17 is a strip that is continuously fed from the uncoiler 31, the molding apparatus 10 is
As shown in FIGS. 6 (A) and 6 (B), the second tension device described above.
A second pulling device 32, which replaces 13, is provided. Second
The pulling device 32 is a fluid pressure cylinder device 33 located below the pass line of the thin plate 17, and a frame-shaped clamper arranged at the tip of the piston rod of the cylinder device 33 so as to surround the entire circumference of the thin plate 17. It consists of 34 and. The clamper 34 incorporates a short hydraulic cylinder device, and the thin plate 17 is to be formed between the first tension device 12 and the first tension device 12.
The middle part of can be clamped, and 35 is a leveler.

Further, in the practice of the present invention, when the molding apparatus 10 uses the second tensioning device 32 shown in FIGS. 6 (A) and 6 (B),
Instead of the first tensioning device 12 facing the second tensioning device 32, a first tensioning device 36 as shown in FIG. 6 (C) may be used. Similar to the second tensioning device 32, the first tensioning device 36 includes a fluid pressure cylinder device 37 located below the pass line of the thin plate 17 and a piston rod tip portion of the cylinder device 37. It is composed of a clamper 38 having a frame shape so as to surround the entire circumference of 17. The clamper 38 is
By incorporating a short hydraulic cylinder device, the cylinder device 37 reciprocates along the path line of the thin plate 17,
The leading end portion or the middle portion of the strip-shaped thin plate 17 sent out from the forming roll device 14 can be sequentially clamped.

Further, in the practice of the present invention, as shown in FIGS. 7 (A) and 7 (B), the molding apparatus 10 includes the first tensioning device 12 and the second tensioning device 12 shown in FIGS. 6 (A) and 6 (B). Thin plate in addition to the tension device 32
It is also possible to use the roller clamp devices 39 and 40 facing each other on a line orthogonal to the 17 pass lines. Each of the roller clamp devices 39, 40 is composed of upper and lower clamping rollers 41, 42, and each clamping roller 41, 42 can bend and hold both side edges of the thin plate 17. Therefore, in the molding apparatus 10 in this case,
A tension in the X direction is applied to the thin plate 17 by both tension devices 12 and 32, and at the same time, a forming roll device 14 presses the molding region of the thin plate 17 held in the Y direction by both roller clamp devices 39 and 40. By adding the tension, the tension in the Y direction can be applied to the thin plate 17. In addition, roller clamp device
As for 39 and 40, one pressing roller 41 and 42 may be arranged along the pass line of the thin plate 17, and a plurality of pressing rollers may be arranged. Further, 43 and 44 are guide rollers for introducing both side edges of the thin plate 17 into the clamp regions of the roller clamp devices 39 and 40.

In the practice of the present invention, the roller clamp device 3
9 and 40 are upper and lower clamping rollers 4 as shown in FIG. 7 (C).
It is also possible to use 5, 46. Each pinching roller 45, 4
6 is capable of holding lock beads by forming lock beads on both side edges of the thin plate 17.

(B) Pressing Method The forming roll device 14 includes a bolster 52 and a slide base 53 above and below the side frame 51, an upper roller die set 55 clamped by a clamp device 54 of the bolster 52, and an upper forming roll 56. Lower forming roll 59 is attached to lower roller die set 58 which is clamped by clamping device 57 of base 53.
The thin plate 17 can be press-formed by the upper and lower forming rolls 56 and 59 under the operation of the press-contacting press 60 provided between the side frame 51 and the slide base 53. Incidentally, 61 is a guide device.

Further, the forming roll device 14 is provided with an exchange rail 62 extending from the upper surface of the slide base 53 to the outside of the side frame 51, and the upper and lower forming rolls 56 and 59 can be quickly changed.

At this time, the forming roll device 14 controls the above-mentioned pressure contact press 60 by the control device 15 to move the upper and lower press contact levels of the upper and lower forming rolls 56 and 59 relative to the pass line level of the thin plate 17 by moving the thin plate 17. By adjusting as shown in FIG. 9 (A) in accordance with the above, drawing can be performed so that the shape of the thin plate 17 in the longitudinal direction changes as shown in FIG. 9 (B).

Further, the forming roll device 14 sets the left and right set positions of the upper and lower forming rolls 56, 59 with respect to the center of the pass line of the thin plate 17 according to the movement of the thin plate 17 by the control device 15 as shown in FIG.
By adjusting as shown in FIG. 10, it is possible to perform drawing so that the shape of the thin plate 17 in the width direction changes as shown in FIG. 10 (B).

Further, as shown in FIG. 11 (A), the forming roll device 14 has upper and lower forming rolls 56, 59 arranged in multiple stages in the pass line direction of the thin plate 17, or in multiple directions in the direction orthogonal to the pass line of the thin plate 17. By disposing, it is possible to give the thin plate 17 a complicated molding form as shown in FIG. 11 (B).

Further, in the forming roll device 14, as shown in FIG. 12, by incorporating the electric heaters 63 and 64 in the upper and lower forming rolls 56 and 59, the thin plate 17 can be warm-worked and its press-contact formability can be improved.

Further, as shown in FIG. 16, the forming roll device 14 is provided with a plate pressing device 100 composed of upper and lower plate pressing shoes 101 and 102 for sandwiching the thin plate 17 around the upper and lower forming rolls 56 and 59. Is also good. Upper and lower plate retainer shoes of plate retainer 100
01 and 102 are set to the left and right or front and back of the upper and lower forming rolls 56 and 59 via a constant gap, and restrain the free movement of the thin plate 17 so that unnecessary strain is not generated in the thin plate 17.

(C) Tensile forming method As shown in FIG. 1, in the first tensioning device 12, the direction of the tension applied to one side of the thin plate 17 is such that the second tensioning device 13
By setting the tension on the same side as the direction of the tension applied to the other side, it is possible to apply a straight tensile force to the thin plate 17.

Therefore, in the first tension device 12, as shown in FIGS. 1 to 3, the support bracket 71 of the fluid pressure cylinder device 21 is mounted on the pedestal 11.
It is configured so that it can be swung on a support shaft 72 provided in the first tension device 12 and the direction of the tension applied to the one side of the thin plate 17 by the first tension device 12 can be controlled by the control device 15. θ is an adjustment angle.

According to this, it is possible to correct the springback and warpage of the thin plate 17 formed by the forming roll device 14 by slightly changing the adjustment angle, and by fixing the adjustment angle to a constant value,
Bending can be performed at the same time that the forming roll device 14 is applied to 17 for drawing.

(D) Processing Example According to the molding apparatus 10, various combinations of the above-mentioned (A) to (C) make it possible to obtain molded products in various forms as shown in FIGS. 13 to 15, for example. . Fig. 13 shows the drawn product, and Fig. 14 (A) shows the short product.
FIG. 14 (B) is a long molded product, and FIGS. 15 (A) and 15 (B) are molded products subjected to combined processing of drawing and bending. These molded products are all the same. It is molded by the molding device 10. At this time, the molding output of the molding apparatus 10 is about 1/20 of the molding output of the conventional press machine.
It was found that the tool cost can be reduced significantly compared to the conventional press machine.

However, according to the molding apparatus 10, the following operations (1) to (4) are performed.

Since the thin plate 17 is formed by the forming roll device 14 under tension, it can be formed with a small forming force. This also means that the device configuration can be downsized.

Since the forming process is performed by the forming roll device 14 while the thin plate 17 is being pulled and moved, any form from a short length to a long length can be accommodated by adjusting the pulling movement length.
Further, the forming rolls 56 and 59 that form the forming roll device 14
By adjusting the press contact position with respect to the thin plate 17 in the vertical and horizontal directions, or by using a plurality of forming rolls 56, 59 in multiple stages, it is possible to form various forms of articles. That is, the same device and tool can be used to mold articles of various shapes.

The forming rolls 56 and 59 are partially pressed against the entire width of the thin plate 17 in the direction orthogonal to the pass line. Therefore, so-called string forming (see FIGS. 13 to 15) in which a part of the thin plate 17 in the plate width direction is drawn can be performed.

By including the first to fourth tension devices 12, 13, 25, 26, the thin plate 17 can be molded while applying tension from the four surfaces of the thin plate 17, and the formability of the thin plate 17 can be improved.

A bending is applied to the thin plate 17 by adjusting the direction of the tension applied to one side of the molded product at the same time as drawing is performed by tension forming while pressing the forming rolls 56 and 59 to the thin plate 17. Will be able to. That is, the molded product can be easily subjected to complex molding such as drawing and bending with a simple device.

The above-mentioned merits (1) to (3) are particularly useful in a high-mix low-volume production line.

[Effects of the Invention] As described above, according to the present invention described in claims 1 and 3, large molding can be performed with a small molding force, and molded products of various forms can be molded by the same device and tool. .

Further, according to the present invention as set forth in claims 2 and 4, it is possible to easily perform complex molding such as drawing and bending on the molded product with a simple device configuration.

[Brief description of drawings]

FIG. 1 is a front view showing an example of a molding apparatus according to the present invention, FIG. 2 is a half plan view of FIG. 1, FIG. 3 is a side view of FIG. 1, and FIG. FIG. 5 is a schematic diagram showing an applied state, FIG. 5 is a schematic diagram showing an X and Y direction tension applied state by a tensioning device, FIG. 6 is a schematic diagram showing another X direction tension applied state by a tensioning device, and FIG. FIG. 8 is a schematic view showing another X and Y direction tension application state by the apparatus, FIG. 8 is a schematic view showing a forming roll device, FIG. 9 is a schematic view showing a forming state by adjusting the vertical position of the forming roll, and FIG. 10 is FIG. 11 is a schematic diagram showing a molding state by adjusting the left and right position of the molding roll, FIG. 11 is a schematic diagram showing a molding state by a multi-stage arrangement of the molding rolls, FIG. 12 is a schematic diagram showing a heating structure of the molding roll, and FIG. Schematic diagram showing an example of a molded product,
FIG. 14 is a schematic diagram showing short and long molded products, FIG. 15 is a schematic diagram showing a composite molded product, and FIG. 16 is a schematic diagram showing a plate pressing device. 10 ... Forming device, 12 ... First tension device, 13 ... Second tension device, 14 ... Forming roll device, 15 ... Control device, 17
...... Thin plate, 25 …… Third tension device, 26 …… Fourth tension device.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yoji Uematsu 1136 Yodoshi, Fujinomiya-shi, Shizuoka Amino Press Giken Co., Ltd. (56) References JP-A 63-115622 (JP, A) JP-A 50-117666 ( JP, A) JP-B 35-9918 (JP, B1) JP-B 51-18240 (JP, B2) JP-B 50-37033 (JP, B2)

Claims (4)

[Claims] 1. A tension is applied to the thin plate by a pair of clampers that clamp the opposite sides of the thin plate via a region to be molded, and a molding roll is pressed against the region to be molded of the thin plate and one side of the thin plate. Is a method of forming a thin plate while pulling and moving the thin plate by making the tension applied to the sheet larger than the tension applied to the other side, wherein the forming roll is the entire sheet width in a direction orthogonal to the pass line of the sheet. A method of forming a thin plate that can be pressed against a part of the sheet. 2. A tension is applied to the thin plate by a pair of clampers that clamp the opposite sides of the thin plate via a region to be molded, the molding roll is pressed against the region to be molded of the thin plate, and one side of the thin plate is formed. A method of forming a thin plate, wherein the tension applied to the other side is made larger than the tension applied to the other side, and the thin plate is formed while being pulled and moved, wherein the direction of the tension applied to one side of the thin plate is adjusted. . 3. A first and a second clamper installed opposite to each other in a direction along a pass line of a thin plate, and a forming roll device installed in an intermediate region sandwiched by the first and second clampers. The first and second clampers are controlled to control the first and second clampers and the forming roll device, and clamp the opposite sides in the direction along the pass line of the thin plate through the region to be formed of the thin plate.
Tension is applied to the thin plate by the clamper, the molding roll of the molding roll device is pressed against the region to be molded of the thin plate, and the tension applied by the first clamper to one side of the thin plate is A thin plate forming apparatus configured to have a control device capable of forming a thin plate while pulling and moving the thin plate by setting the tension to be larger than the tension applied to the other side of the thin plate, the device being orthogonal to the pass line of the thin plate. The control device further includes third and fourth clampers that are installed to face each other in the direction of rotation, and the control device includes the third and fourth clampers when the thin plate is stretch-formed by the first and second clampers and the roll device. Is moved in the direction of the thin plate's pass line in synchronization with the movement of the thin plate,
A thin plate forming apparatus capable of applying tension to both sides of the thin plate opposite to each other in a direction orthogonal to a pass line of the thin plate by the third and fourth clampers. 4. A first and a second clamper installed opposite to each other in a direction along a pass line of a thin plate, and a forming roll device installed in an intermediate region sandwiched by the first and second clampers. The first and second clampers are controlled to control the first and second clampers and the forming roll device, and clamp the opposite sides in the direction along the pass line of the thin plate through the region to be formed of the thin plate.
Tension is applied to the thin plate by the clamper, the molding roll of the molding roll device is pressed against the region to be molded of the thin plate, and the tension applied by the first clamper to one side of the thin plate is A thin plate forming apparatus configured to include a control device capable of forming the thin plate while pulling and moving the thin plate by making the tension larger than the tension applied to the other side of the thin plate, the first pulling device. Is a thin plate forming apparatus capable of adjusting the direction of tension applied to one side of the thin plate.