JPH11216519A - Bending method and device of plate folding processor, and bending metal mold therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it capable of coping with a special bending without losing its general versatility. SOLUTION: In a plate folding processor being equipped with a bend beam 29 which has a pair of an upper bending metal mold 25 and a lower bending metal mold 27, an upper subsidiary mold and a lower subsidiary mold are installed in a throat part 31 of a bend beam 29 at the position where they meet the tip end of the upper bending metal mold 25 and the lower bending metal mold 27 respectively. A side-to-side direction length of the upper and lower subsidiary molds is set to be identical to the bending length of the given plate portion and, also, the subsidiary molds are set positioning free at a given position. Thus, a given partial bending is made possible without losing its general versatility.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for bending a sheet material bending machine for partially bending a sheet material, and a bending die used for the apparatus.

[0002]

2. Description of the Related Art Conventionally, when a product G having an R-bend as shown in FIG. 12 is bent by a plate material bending machine, a single bending die is used even if a holding die is adjusted to a bending length. Therefore, it cannot be processed, and a clearance is required in the K portion as shown in FIG.

[0003]

By the way, in the above-described conventional plate material bending machine, as shown in FIG. 14, the work W is pressed by the upper and lower presser dies 101 and 103, and the R portion is moved forward. When bending, the side of the groove is bent because the bending mold 105 is over the entire length. Further, as shown in FIG. 15, if the adjacent side is bent first, the springback of the R-bend is large, so that the adjacent side is crushed at the time of overbending.

[0006] Further, as shown in FIG. 16, in a standard bending die, when the dimension a is small, it interferes with the work W. If the bending mold 105 is made thinner to avoid interference with the work W, the bendable plate thickness can be limited, and acute angle bending becomes impossible. In addition, in order to bend the product G as shown in FIG. 17, the bending mold 105 must be comb-shaped.

SUMMARY OF THE INVENTION An object of the present invention is to provide a bending method and apparatus for a sheet material bending machine capable of coping with special bending without losing versatility, and a bending die used for the apparatus.

[0006]

According to a first aspect of the present invention, there is provided a bending method for a sheet material bending machine, comprising: a pair of upper and lower bending dies; When a pair of upper and lower auxiliary dies are provided on the part to bend the work, the upper and lower auxiliary dies are positioned at predetermined positions in the left-right direction, and the plate material is positioned at predetermined positions by vertical movement of the bend beam. And a product unloading step of unloading the processed product from the plate bending machine to the outside by the upper and lower auxiliary molds. .

According to a third aspect of the present invention, there is provided a sheet material bending machine provided with a bend beam provided with a pair of vertically movable upper and lower bending dies. An upper and lower auxiliary mold is provided at a processing position in contact with the tip of the upper and lower bending mold in the bend portion of the bend beam, and the length of the upper and lower auxiliary mold in the left-right direction is set to a predetermined plate material portion. It is characterized in that it has the same bending length and is provided so as to be freely positioned at a predetermined position.

Therefore, by using the bending method and the apparatus for the plate material bending machine according to the first and third aspects, the upper and lower auxiliary dies can be formed into the upper and lower bending dies in the throat portion of the bend beam. It is provided to be in contact. And above,
The lower auxiliary mold is replaceable so as to be able to cope with the partial bending length of the plate material with respect to the bend beam, and can be positioned at a predetermined bending position. Further, by moving the upper and lower auxiliary dies, the processed product can be carried out of the plate bending machine to the outside.

Thus, it is possible to cope with special bending without losing versatility and to carry out processed products.

According to a second aspect of the present invention, there is provided a bending method for a plate material bending machine according to the present invention, wherein a lower auxiliary die is provided at a throat portion of a bend beam provided with a pair of upper and lower bending dies to bend a workpiece. A bending step of positioning the lower auxiliary mold at a processing position to perform partial bending of a plate material at a predetermined position by up-and-down movement of the bend beam; and a retracting step of positioning the lower auxiliary mold at a retracted position. And characterized in that:

According to a fourth aspect of the present invention, there is provided a sheet material bending machine provided with a bend beam provided with a pair of vertically movable upper and lower bending dies. Further, a lower auxiliary mold that can be positioned by an actuator at a processing position in contact with a tip of the lower bending mold and a retracted position is provided in the bend portion of the bend beam.

Therefore, the lower auxiliary mold that can be positioned between the processing position and the retracted position within the bend beam throat is provided by the bending method and apparatus of the plate bending machine according to the second and fourth aspects of the present invention. Provided. For this reason, the lower auxiliary mold is positioned at the processing position when in use, and is at the retracted position when not in use, so that the lower auxiliary mold does not become an obstacle during bending with the upper and lower bending dies.

According to a fifth aspect of the present invention, there is provided a bending apparatus for a sheet material bending machine according to the third aspect, wherein the upper and lower auxiliary dies are provided to drive members in the left-right direction. It is characterized by being provided movably.

According to a sixth aspect of the present invention, in the bending apparatus for a sheet material bending machine according to the fifth aspect of the present invention, the driving member comprises an upper and lower auxiliary mold. It is characterized by comprising a connected chain and a drive motor for running the chain.

Therefore, by using the bending device of the plate material bending machine according to the fifth and sixth aspects,
The positioning of the upper and lower auxiliary dies in the left and right direction is performed by moving the upper and lower auxiliary dies in the left and right direction via a chain by driving a drive motor, positioning them in a predetermined position, and carrying out processed products. can do. Therefore, the positioning of the upper and lower auxiliary dies and the unloading of the product can be reliably performed with a simple configuration.

According to a seventh aspect of the present invention, there is provided a bending mold comprising:
In the throat part of the bend beam having a pair of upper and lower bending dies,
An auxiliary bending mold having a length equal to a predetermined workpiece bending length is positioned at a predetermined position.

According to an eighth aspect of the present invention, there is provided the bending die according to the seventh aspect, wherein the auxiliary bending die is movable in the left-right direction.

According to a ninth aspect of the present invention, there is provided a bending die according to the seventh aspect, wherein the auxiliary bending die can be freely exchanged between a processing position and a retracted position. It is.

Therefore, by using the bending die according to the seventh and 8.9 aspects, the auxiliary bending die having the same length as the predetermined work bending length is positioned at the predetermined position, and is movable in the left-right direction or the processing position. It can be exchanged between and the retreat position.

Thus, it is possible to cope with special bending with the auxiliary bending mold without losing versatility.

[0021]

Embodiments of the present invention will be described below in detail with reference to the drawings. The plate bending machine and the carry-in device for loading the plate into the plate bending machine have a known configuration, and thus a detailed description thereof will be omitted.

First, the overall configuration of a plate bending machine and a carry-in device will be schematically described for easy understanding.

Referring to FIGS. 10 and 11, a work table 5 constituting a carry-in device 3 for carrying in a plate material is installed on the front side (left side in FIGS. 10 and 11) of the plate material bending machine 1. . An unloading table 7 for carrying out processed products is provided between the work table 5 and the plate bending machine 1.

On the upper part of the work table 5, there is provided a clamping device 9 for holding a plate material,
A manipulator 15 is provided which is provided with a rotating mechanism 13 having a rotating shaft 11 for rotating the manipulator 15 and which can be moved back and forth.

The plate bending machine 1 comprises a vertically movable frame 19 above and below the fixed frame 17. The fixed frame 17 is provided with a lower plate 21 extending in the left-right direction (the direction perpendicular to the drawing in FIG. 10 and the up-down direction in FIG. 11), and the lifting frame 19 is opposed to the lower plate 21 in the left-right direction. An extended upper plate 23 is provided.

With the above structure, the plate material is clamped and fixed by the upper plate 23 and the lower plate 21 by the vertical movement of the lifting frame 19, and the clamped state is released. is there.

A bend beam 29 having a forward bending die 25 and a reverse bending die 27 is provided to bend the projecting portion of the plate material, which is clamped and fixed by the upper plate 23 and the lower plate 21, downward or upward. It is provided to be able to swing up and down.

With the above structure, by appropriately operating the bend beam 29, the forward bending mold 25 swings upward, or the reverse bending mold 27 swings downward, thereby projecting the plate material. The part can be bent upward or downward.

Next, the upper and lower auxiliary molds, which are main parts of the present invention, will be described in detail.

Referring to FIGS. 1, 2 and 3, the bend beam 29 is provided with a pair of forward bending dies 25 and reverse bending dies 27.
The upper auxiliary mold 33 and the lower auxiliary mold 35 are provided with a guide member 37.
And is movably mounted in the left-right direction (the direction orthogonal to the drawing in FIG. 1, the left-right direction in FIGS. 2 and 3). The upper and lower auxiliary dies 33, 35 are provided at the processing positions in contact with the opposite ends of the forward and reverse bending dies 27, 25, respectively.
Reference numeral 35 is attached to the bend beam 29 and can be removed and replaced in order to correspond to the bending length.

A driving member 39 for moving and positioning the upper and lower auxiliary dies 33 and 35 in the left-right direction is provided on one side of the bend beam 29 as shown in FIGS. A drive sprocket 43 is provided on the output shaft of the motor 41. And the bend beam 2
9 is provided with a driven sprocket 45, and a chain 47 is hung around the driving sprocket 43 and the driven sprocket 45, and both ends of the chain 47 are the upper and lower auxiliary molds 33, 35 respectively. 2 and 3 show the drive member 39 of the upper auxiliary mold 33, the drive member 39 of the lower auxiliary mold 35 has the same configuration.

With the above configuration, when the drive motor 41 is driven, the drive sprocket 43 rotates, and the chain 4
7 travels, the upper and lower auxiliary dies 33 and 35 move in the left-right direction along the guide member 37 and are positioned at predetermined positions.

With the above-described configuration, the operation is as shown in FIGS. 4A and 4B.
As shown in FIG. 4A, to produce a product G having a partially bent portion M as shown in FIG.
The lower auxiliary mold 35 is positioned at a predetermined position of the plate material W clamped and held by the upper and lower plates 21 and 23, and the bend beam 29
Is rocked upward to perform bending. Although illustration is omitted, partial bending using the upper auxiliary mold 33 is also possible. Thus, it is possible to perform partial bending, which was impossible in the past.

FIGS. 5 (A) and 5 (B) show a method of unloading a product, in which the final bending is the unloading of a reverse-bent (downward-bent) product, and the product G is an upper and lower plate. In the case where the upper and lower panels 23 and 21 are not released from the front, the clamps of the upper and lower panels 23 and 21 are released, and then the lower auxiliary mold 35A (this mold is a modified version of the lower auxiliary mold 35 with a side plate attached thereto). )) And pushes out the bent product G to the outside of the machine. Although not shown, the upper bending product can be carried out using the upper auxiliary mold 33.

FIGS. 6A and 6B show a case where a short bending of the flange is performed. That is, FIG.
In (A), when the short bending of the flange is performed by the forward bending die 25, the downward bending die 25 comes off from the sheet material before the bending is completed. For this reason, as shown in FIG. 6 (B), when performing short bending of the flange, bending using the lower auxiliary mold 35 can be performed at substantially right angles. Although not shown, it is also possible to use the upper auxiliary mold 33 to make a short downward bending of the flange.

As described above, the upper and lower auxiliary molds 33, 3
By using 5, partial bending, short bending of the flange, or unloading of the processed product becomes possible, so that a special transport means is not required and the cost is reduced.

FIGS. 7 and 8 show another embodiment. In this embodiment, the lower auxiliary mold 35B can be freely switched between a processing posture and a retracted posture.

That is, an arm 49 for supporting the lower auxiliary mold 35B is rotatably provided via a shaft 53 to a bearing member 51 provided on the throat portion 31 of the bend beam 29. A lever 55 is integrally provided at one end of the shaft 53, and a fluid pressure cylinder 59 is rotatably provided as an actuator for turning an auxiliary mold on a bracket 57 provided on one side of the bend beam 29. Have been. The fork end 63 provided at the tip of the piston rod 61 of the fluid pressure cylinder 59 is provided with a pin 6 provided on the lever 55.
5 is rotatably mounted.

With the above configuration, the operation is as shown in FIG.
Referring to FIG. 9, the lower auxiliary mold 35B is processed by the operation of the fluid pressure cylinder 59 to a processing position (a position indicated by a solid line in FIG. 9) and a retracted position (a position indicated by a two-dot chain line in FIG. 9).
Can be switched to

That is, when using the lower auxiliary mold 35B, the lower auxiliary mold 35B is brought into contact with the lower bending mold 27, and the front end of the lower bending mold 27 and the front end of the lower auxiliary mold 35B are moved upward by a predetermined distance. , And at the same coordinate in the front-rear direction, the lower auxiliary mold 35B can be positioned at a predetermined position by controlling the bend beam 29 as usual. In this embodiment, the lower auxiliary mold 35B is not manually moved in the longitudinal direction, but is manually mounted at a predetermined position.

The present invention is not limited to the above-described embodiment, but can be embodied in other forms by making appropriate changes.

[0042]

As will be understood from the above description of the embodiments, according to the present invention according to claims 1 and 3,
The upper and lower auxiliary molds are provided in the bend portion of the bend beam so as to be in contact with the upper and lower bending molds. The upper and lower auxiliary dies are exchangeable to be able to cope with the partial bending length of the plate material with respect to the bend beam, and can be positioned at a predetermined bending position. Further, by moving the upper and lower auxiliary dies, the processed product can be carried out of the plate bending machine to the outside.

Thus, it is possible to cope with special bending without losing versatility and to carry out processed products.

According to the second and fourth aspects of the present invention, the lower auxiliary mold that can be positioned between the processing position and the retracted position is provided in the bend portion of the bend beam. For this reason, the lower auxiliary mold is positioned at the processing position when in use, and is at the retracted position when not in use, so that the lower auxiliary mold does not become an obstacle during bending with the upper and lower bending dies.

According to the present invention according to claims 5 and 6,
The positioning of the upper and lower auxiliary dies in the left and right direction is performed by moving the upper and lower auxiliary dies in the left and right direction via a chain by driving a drive motor, positioning them in a predetermined position, and carrying out processed products. can do. Therefore, the positioning of the upper and lower auxiliary dies and the unloading of the product can be reliably performed with a simple configuration.

According to the present invention, the auxiliary bending mold having the predetermined bending length of the workpiece is positioned at the predetermined position, and is movable in the left-right direction or exchanged between the processing position and the retracted position. It was free.

Thus, it is possible to cope with special bending with the auxiliary bending mold without losing versatility.

[Brief description of the drawings]

FIG. 1 is a side view of an upper and lower auxiliary mold showing a main part of the present invention.

FIG. 2 is a front view of an upper auxiliary mold in FIG. 1;

FIG. 3 is a bottom view in FIG. 2;

FIG. 4 is an operation explanatory view.

FIG. 5 is an operation explanatory view.

FIG. 6 is an operation explanatory view.

FIG. 7 is a sectional view taken along line VII-VII in FIG. 8, showing a lower auxiliary mold and a driving member according to another embodiment.

FIG. 8 is a side view showing a lower auxiliary mold and a driving member.

FIG. 9 is an operation explanatory view.

FIG. 10 is an explanatory side view showing a plate bending machine and a plate loading device according to an embodiment of the present invention;

FIG. 11 is an explanatory plan view of FIG. 10;

FIG. 12 is an explanatory perspective view of a bent product, showing a conventional example.

FIG. 13 is a perspective explanatory view showing a conventional example and showing a defect of a bent product.

FIG. 14 is a perspective explanatory view showing a conventional example and showing a bending state.

FIG. 15 is a perspective explanatory view showing a conventional example and showing a defect at the time of bending.

FIG. 16 is an explanatory side view showing a conventional example and showing a bending state when a bending flange is small.

FIG. 17 is a perspective view showing a conventional example, which is a product having a large number of partial bends.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 plate material bending machine 25 forward bending die 27 reverse bending die 29 bend beam 31 throat portion 33 upper auxiliary die 35, 35A, 35B lower auxiliary die 41 drive motor (drive member) 47 chain (drive member) 59 Fluid pressure cylinder (actuator)

Claims (9)

[Claims] When a work is bent by providing a pair of upper and lower auxiliary dies at a nod portion of a bend beam provided with a pair of upper and lower bending dies, the upper and lower auxiliary dies are provided. A bending step of positioning a mold at a predetermined position in the left-right direction and partially bending a predetermined position of the plate material by a vertical movement of the bend beam; and, using the upper and lower auxiliary dies, a product processed by the plate material bending machine. And a product unloading step of unloading the product to the outside. 2. A method according to claim 1, wherein the lower auxiliary mold is positioned at a processing position when a lower auxiliary mold is provided at a throat portion of a bend beam provided with a pair of upper and lower bending dies to bend a workpiece. A bending process for partially bending a predetermined position of the plate material by a vertical movement of the bend beam, and a retreating step for positioning the lower auxiliary mold at a retreat position. Bending method. 3. A plate material bending machine provided with a bend beam provided with a pair of vertically movable upper and lower bending dies, and a tip of the upper and lower bending dies is provided in a throat portion of the bend beam. The upper and lower auxiliary molds are provided at positions in contact with the upper and lower auxiliary molds, and the length in the left-right direction of the upper and lower auxiliary molds is the same as the predetermined plate material part bending length, and the lower auxiliary mold is provided so as to be freely positioned at a predetermined position. Characteristic bending machine of plate bending machine. 4. A plate bending machine having a bend beam provided with a pair of vertically movable upper and lower bending dies, and a tip of the lower bending die is contacted in a throat portion of the bend beam. A bending apparatus for a plate material bending machine, comprising a lower auxiliary mold that is freely positioned by an actuator at a processing position and a retracted position. 5. The upper and lower auxiliary molds are provided so as to be movable in a left-right direction by a driving member.
A bending device of the plate material bending machine described in the above. 6. The sheet material bending process according to claim 5, wherein said driving member comprises a chain connected to upper and lower auxiliary dies, and a driving motor for driving said chain. Machine bending machine. 7. A bending die, wherein an auxiliary bending die having a length equal to a predetermined workpiece bending length is provided at a predetermined position in a nod portion of a bend beam having a pair of upper and lower bending dies. 8. The bending die according to claim 7, wherein the auxiliary bending die is movable in the left-right direction. 9. The method according to claim 7, wherein the auxiliary bending mold is positionally exchangeable between a processing position and a retracted position.
The described bending mold.