JP2001129614A - Bending machine and method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the bending machine and method capable of partial- processing form different from the cross-section form to the work as well as whole bending with ease, an which have various uses without increasing man- hours. SOLUTION: The machine is provided with a movable metal mold 3 arranged in front of the fixed metal mold 1 so as to be turntable displace able, and rotatable for bending the whole in the cross section of a long work W, a movable part 5 mounted on the movable metal mold 3 for patial-bending at the cross-section of the work, and a drive means 6 to drive the movable part 5, so that the bending of the whole body in the cross-section of long work W is available to the form resulting from the displacement of the moving metal mold 3, and further, the partial bending in the cross-section of the work is available to the form resulting from the displacement of the moving part 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bending apparatus used for bending a long metal workpiece such as a section or a steel made of aluminum (including its alloy).
In particular, the present invention relates to a bending apparatus and a bending method suitable for manufacturing a member having a different cross-sectional shape at each portion in a longitudinal direction.

[0002]

2. Description of the Related Art Japanese Patent Application Laid-Open No. Hei 7-2 describes this type of processing apparatus.
There is one disclosed in Japanese Patent No. 41617. This is, as shown in FIG. 15, in front of a fixed mold 101 having a work conduction hole 102 through which a long work (also simply referred to as a work) W such as an I-shaped cross section is conducted (downstream of the work moving direction). And a movable mold 103 having a conduction hole 104 for one of the flanges Wf coupled to the web We of the work W and displaceable about an axis along the work longitudinal direction. .

In this processing apparatus, a workpiece W is fixed to a fixed mold 1.
When the work W is forcibly moved in the longitudinal direction after the flange Wf of the work W is conducted to the conduction hole 104 of the movable mold 103, the work W is forcibly moved in the longitudinal direction.
By rotating the movable mold 103 by, for example, a fixed angle at an arbitrary position in the longitudinal direction of the work W with the fixed mold 101 as a fulcrum, the intersection angle θ of the flange Wf with respect to the web We as shown in FIG. Can be obtained.

[0004]

In the case where the above-mentioned I-shaped section or L-shaped section is used as a stiffener fixed to the bottom of a ship or a reinforcing material for an aircraft wing, for example, It is necessary to bend the material three-dimensionally in the longitudinal direction in accordance with the overall shape of the ship bottom and the wings. In other words, the ship bottom and wings have a shape in which a plane portion and a curved portion are intricately combined, and at an arbitrary portion in the longitudinal direction of the work W, the whole of the work W in the cross-sectional shape is bent or the work W is traversed. Only a part of the surface must be bent.

[0005] However, in the above-described conventional bending apparatus, the movable mold 103 provided in front of the fixed mold 101 is used.
Is a part of the work W (for example, the flange We of the I-shaped material)
Since only the function of changing the cross-sectional shape by bending only the workpiece W is provided, there is a problem that even if an attempt is made to bend the entire work W in the cross-sectional shape, it cannot be coped with. In order to cope with this, separately, using a bending machine equipped with a conventional movable mold that restrains the entire cross-sectional shape, the entire shape is bent, and then a part of the shape is Must be bent. That is, there is a drawback that if a desired bent product is to be obtained, the number of steps is increased and the cost is increased.

The present invention has been made in view of the above-described circumstances, and allows a workpiece to be partially processed into a form having a different cross-sectional shape without increasing the number of steps, and the entire bending process can be easily performed. An object of the present invention is to provide a bending apparatus capable of expanding the use of a bent product.

[0007]

SUMMARY OF THE INVENTION The object of the present invention is to provide a fixed mold having a work conducting hole, and a fixed mold having the same work conducting hole, which is used in front of the fixed mold for the entire bending process in the cross-sectional shape of the work. And a movable piece provided in the movable mold, and a driving unit for drivingly displacing the movable piece, for partial bending in a cross-sectional shape of the workpiece. The problem is solved by a bending device characterized in that the bending device is provided.

[0008] According to this bending apparatus, the movable die is displaced when the work passing through the through holes of the fixed die and the movable die is moved in the longitudinal direction by a pushing operation or the like. The entire cross-sectional shape of the workpiece can be bent into a shape obtained by displacement. Further, by displacing the movable piece via the driving means, it is possible to bend a part of the cross-sectional shape of the workpiece into a shape obtained by the displacement. That is, it is possible to simultaneously perform the entire workpiece and the partial bending without increasing the number of steps of bending the workpiece.

[0009] The movable piece may have a through hole for conducting a part of the cross section of the work, and the through hole may also serve as a part of the work through hole of the movable mold. .

In this case, if the work is conducted through the conduction hole of the movable piece, a part of the work is held by the movable piece, and the entire bending and partial bending of the work can be reliably performed. Done in

[0011] Further, the object is to provide a state in which the work is conducted to the work conduction holes of the fixed mold and the movable mold disposed in front of the fixed mold, and the entire cross-sectional shape of the work is restrained while moving the work. And displacing the movable piece provided in the movable mold in a manner different from the displacement of the movable mold while the movable mold is displaced and a part of the cross-sectional shape of the work is restrained. It is also solved by the bending method.

According to this bending method, it is possible to manufacture a bent product whose cross-sectional shape is partially different in the length direction by displacing the movable mold and further displacing the movable piece.

[0013]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view showing a push-through type bending apparatus to which a bending apparatus according to an embodiment of the present invention is applied. In this embodiment, an L-shaped section material is subjected to bending work. W.

The push-through bending apparatus shown in FIG.
A fixed mold 1 having a work conducting hole 2, a movable mold 3 also having a work conducting hole 4, disposed in front of the fixed mold 1, and a movable piece 5 mounted on the movable mold 3. And a driving means 6 for the movable piece 5, a pusher disposed behind the fixed mold 1 (upstream in the work pushing direction) and forcibly conducting the work W to the work conduction hole 2 of the fixed mold 1. And a work feeder F.

The fixed mold 1 serves as a fulcrum at the time of bending the work W which is conducted to the work conduction hole 2. The work conduction hole 2 is an L-shaped front shape penetrating in the front-rear direction in accordance with the cross-sectional shape of the work W, and is formed by being surrounded by a plurality of rollers and the like. Is also good.

The movable mold 3 is set so as to be capable of rotating and displacing in the X-axis direction a in the three-dimensional coordinates shown in FIG. 1, turning in the Y-axis direction b and Z-axis direction c, and the like. These displacement operations are performed by a drive mechanism (not shown) such as a cylinder device (not shown).

In the movable mold 3, a conduction hole 4A corresponding to one side (horizontal piece) Wa of the L-shaped workpiece W is formed as a part of the workpiece conduction hole 4 so as to penetrate in the front-rear direction. Further, communicating with the base end side of the conduction hole 4A, a cavity 7 for installing the movable piece 5 is formed penetrating in the front-rear direction as clearly shown in FIG.

The movable piece 5 has a cutout formed with a conductive hole 4B having a cross-sectional shape corresponding to the other side (vertical piece) Wb of the work W. Is formed in an inverted "S" shape when viewed from the front. The movable piece 5 is stored in the cavity 7, and its base end 5 a is pivotally supported by the movable mold 3 via a support shaft 8 attached to the movable mold 3. As a result, the tip of the movable piece 5 is positioned in the width direction of the workpiece W (FIG. 3).
(Left-right direction of FIG. 3), it is set to be rotatable between the return position in FIG. 3 and the bending position in FIG. Movable piece 3
Is provided in the space 7, so that the conduction hole 4
B is configured to also serve as a part of the work conduction hole 4 in the movable mold 3.

The front shape of the movable piece 5 is not limited to the above-mentioned inverted "S" shape, but can be changed as appropriate. The present invention is not limited to the one provided, and may be connected to one of the front and rear surfaces of the movable mold 3, for example.

The driving means for the movable piece 5 comprises a motor or a cylinder device 6 as in this embodiment, and its piston rod 6a passes through a through hole 9 formed in the movable mold 3 for rod advance / retreat. The distal end is connected to the side surface of the movable piece 5 as shown in FIG. The movable piece 5 is at the return position shown in FIG. 3 when the piston rod 6a is retracted, and is set to the bending position shown in FIG. 6 when the piston rod 6a is advanced. Of course, it is also possible to change the mounting position of the cylinder device 6 and set the movable piece portion 5 to the bending position in the retracted state of the piston rod 6a.

Next, a description will be given of a method of processing the work W by the push-through bending apparatus having the above-described configuration.

Here, a work W having an L-shaped cross section in FIG.
Is bent to obtain a bent product shown in FIG.

First, the work W is inserted into the work conduction hole 2 of the fixed mold 1 and the work conduction hole 4 of the movable mold 3 in this order (see FIG. 3). In this state, the movable die 3 is turned while the work W is forcibly pushed through the work conduction holes 2 and 4 of the two dies 1 and 3 by the work feeder F.
By performing the displacement / rotation operation, the workpiece W is bent with the fixed mold 1 as a fulcrum.

Here, at the time of forced conduction, the movable mold 3 is turned to the forwardly inclined posture as shown in FIG.
The work W regulated by the above is bent in a curved shape in the longitudinal direction. In this bending, the overall shape of the work W in the cross section remains L-shaped as shown in FIG.

Further, while forcibly conducting the work W through the respective work conducting holes 2 and 4 of the two dies 1 and 3, as shown in FIGS.
When the movable piece 5 is pivotally displaced to the bending position, the other side portion Wb of the work W becomes as shown in FIG.
The intersection angle with respect to one side Wa increases (θ1 <θ
2) It is inclined and deformed outward as shown in FIG. That is, only a part of the cross section of the work W can be bent.

From this, as shown in FIG. 4, the work W is forcibly conducted while controlling the movable mold 3 so as to bend while maintaining the overall shape of the cross section, so that a predetermined lengthwise direction of the work W is obtained. When the movable part 5 is rotated to the bending position when the part reaches the movable mold 3, the workpiece W is partially bent at a predetermined part while the entirety of the workpiece W is curved. Can be applied.

Therefore, a desired bent product Wo as shown in FIG. 7 can be obtained by only one process without performing the entire bending process and the partial bending process of the work W in separate processes. Of the bent product Wo can be easily adapted to various required shapes including a flexible material at the bottom of the ship.

Incidentally, a movable piece that presses the other side Wb of the work W from the inner surface side may be used, but in that case, the bending operation may not be stable. However, as in this embodiment, the movable piece portion 5 is
b, and a conduction hole 4B for conducting the
When the work also serves as a part of the work conduction hole 4 of the movable mold 3, if the work is conducted to the conduction hole of the movable piece, a part of the work is held by the movable piece. In this state, the entire bending and partial bending of the work can be reliably performed.

In this embodiment, the movable mold 3 is controlled to the posture shown in FIG. 4 in order to bend the work W in the longitudinal direction. However, the movable mold 3 has a desired bent product Wo.
It is needless to say that the turning, the displacement and the rotation are controlled in accordance with the shape of. For example, as shown in FIG. 10, the work W is subjected to a bending process such as a twist around the X axis by rotating the movable mold 3 in a direction a around the X axis along the length direction. be able to.

In the above embodiment, the movable mold 3 for the entire bending process is provided with only the movable piece portion 5 for performing the partial bending process on the other side portion Wb of the work W. However, the present invention is not limited to this. For example, FIG.
As shown in FIG. 5, another space 71 is formed in the movable mold 3, and a second movable piece 51 that performs a partial bending process on one side Wa of the work W is disposed in the space 71. However, it is also possible to configure this to be driven by another driving means 61.

In this case, as shown in FIG. 12, the angle of intersection θ between one side Wa and the other side Wb of the bent product Wo.
2 can be finely adjusted and changed.

Further, the movable piece 5 may have a plurality of stages. For example, as shown in FIG. 13, a second-stage movable piece portion 52 in which the tip Wc of the other side W of the workpiece W is to be bent is placed in another space 72 formed in the movable piece portion 5. The second movable piece 52 may be driven by another driving means 62.

In this case, as shown in FIG. 14, the other side Wb of the bent product Wo is inclined with respect to one side Wa, and the tip Wc of the other side Wb is further bent independently to form the other side. The part Wb can be inclined by the angle θ3.

The workpiece W to be processed has a cross section L
It is a matter of course that a work having a cross section of I-shape or H-shape can be used without being limited to the character shape.

[0036]

As described above, according to the present invention, the movable mold is displaced when the work passing through the through holes of the fixed mold and the movable mold is moved in the longitudinal direction and bent. The whole work cross-sectional shape can be bent into the shape obtained by the displacement, and further, by displacing the movable piece portion via the driving means, the work cross-sectional shape can be obtained by the displacement. Can be partially bent. As a result, the work W
The entire and a part of the cross-sectional shape can be subjected to bending in one bending step, and bent products having various shapes according to applications can be easily obtained.

In the case where the movable piece portion has a conduction hole for conducting a part of the work in the cross-sectional shape, the conduction hole also serves as a part of the work conduction hole of the movable mold. Is
If the work is conducted to the conduction hole of the movable piece, a part of the work is held between the movable pieces, and the entire bending and partial bending of the work can be reliably performed.

In addition, the work is conducted to the work conduction holes of the fixed mold and the movable mold disposed in front of the fixed mold, and the movable mold is moved in a state where the entire cross-sectional shape of the work is restrained while moving the work. According to the bending method of displacing the movable piece while displacing the movable piece in a state different from the displacement of the movable mold, in a state where a part of the cross-sectional shape of the work is restrained, By displacing the movable mold and further displacing the movable piece, it becomes possible to manufacture a bent product whose cross-sectional shape partially differs in the length direction.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a bending apparatus according to an embodiment of the present invention.

FIG. 2 is a perspective view showing an assembled state of a movable mold in the bending apparatus.

FIG. 3 is a front sectional view showing a state where a work is conducted to a movable mold in the bending apparatus.

FIG. 4 is a perspective view showing a state where the entire workpiece is bent by a movable die in the bending apparatus.

FIG. 5 is a perspective view showing a state in which a workpiece is bent by a movable piece in the bending apparatus.

FIG. 6 is a front sectional view showing displacement of a movable piece during bending of a workpiece.

FIG. 7 is a perspective view showing a desired bent product obtained by the bending device.

FIG. 8 is a sectional view taken along the line VIII-VIII in FIG. 7;

FIG. 9 is a sectional view taken along line IX-IX of FIG. 7;

FIG. 10 is a front sectional view showing another displacement control state of the movable mold.

FIG. 11 is a front sectional view showing another example of equipment of a movable piece in a movable mold.

FIG. 12 is a cross-sectional view showing a bent product obtained by the one shown in FIG. 11;

FIG. 13 is a front sectional view showing still another example of equipment of a movable piece in the movable mold.

FIG. 14 is a cross-sectional view showing a bent product obtained by the one shown in FIG.

FIG. 15 is a perspective view showing a conventional bending apparatus.

FIG. 16 is a cross-sectional view showing a bent product obtained by a conventional bending device.

[Explanation of symbols]

1 ·························································· Movable Die work conduction hole 4B ······· Conduction hole part (part of work conduction hole of movable mold) 5, 51, 52 ··· Movable piece part 6, 61, 62 ··· Driving means W · ········ Long work Wa ······ Specified part of the work

Claims (3)

[Claims] 1. A fixed mold having a work conducting hole, and a movable mold also having a work conducting hole and arranged in front of the fixed mold for the entire bending of a work in a cross-sectional shape. A movable piece provided on the movable mold for partial bending in a cross-sectional shape of the workpiece; and a driving unit for driving and displacing the movable piece. Bending equipment. 2. A movable piece is disposed in a movable mold so as to be rotatable and displaceable in a width direction of a work, and the movable piece is electrically connected to a required portion in a cross-sectional shape of the work. The bending device according to claim 1, wherein a hole is formed by notching, and the conduction hole also serves as a part of a work conduction hole of the movable mold. 3. A work is conducted to each work conduction hole of a fixed mold and a movable mold disposed in front of the fixed mold, and the movable mold is displaced while moving the work so that the entire cross-sectional shape of the work is reduced. A bending method, wherein bending is performed and a part of a cross-sectional shape of a work is bent by displacing a movable piece in a manner different from the displacement of the movable mold.