JPH09216017A - Device for bending long size material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To increase the amount of bending in the vertical direction of a material to be worked by holding a long size material to be worked with a rotary bending device and pressing the material to be worked against a bending die by revolving the rotary bending die as imparting a certain tension. SOLUTION: One end of the material S to be worked is held with the clamping part 28 of the rotary bending die 23 and the other end is held with the clamping part 46 of a rotary arm 33. In the state where the material S to be worked is pulled, when the rotary bending die 23 is revolved in one direction by the rotation of a rotary table 22, the material S to be worked is pressed against the rotary bending die 23 and wound around the outer periphery of the rotary bending die 23. When the material S to be worked is pressed against a vertically curved part 27 of the outer peripheral groove of the rotary bending die 23, a cylinder device 45 for rotating is operated and the rotary arm 33 is turned in the vertical direction corresponding to the bended state in the vertically curved part 27. The material S to be worked is correctly pressed against the groove on the outer periphery of the rotary bending die 23 and bent into a correct shape.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for bending a long product, for example, an elongated steel material used for window frames of automobile doors.

[0002]

2. Description of the Related Art Conventionally, bending of a long product is often performed using a bending device. The bending apparatus has a work piece (steel material) S as shown in FIG.
A rotary bending die 52 provided with a grip portion 51 for holding one end of the workpiece is provided with a rotary bending device 54 provided on a rotary base 53, and the other end of the workpiece S is pulled and moved in the direction of the rotary bending die 52. The tensile bending device 55 presses the processed material S against the rotary bending die 52 to form a predetermined bending shape. In the tension bending device 55, a vertical support member 57 is provided on a rail 56 provided in the direction of the rotary bending die 52 so as to be able to reciprocate toward the rotary bending die 52. Is provided.
The rotary bending die 52 has a groove 59 formed on the outer periphery thereof according to the bending shape of the material to be processed.
By pressing the work material S against the work piece, the work material is bent.

Further, as a steel material used for a window frame of an automobile door, a three-dimensional bent shape which is bent not only on one plane but also in a direction orthogonal to the plane is used. . The rotary bending die for three-dimensional bending as described above has a groove 59 on the outer periphery thereof which is bent on a horizontal plane and has a portion 60 which is bent vertically.
On the other hand, in the pulling and bending device 55, a grip portion 58 is attached to a tall vertical support member 57 so as to be vertically slidable.

The three-dimensional bending apparatus is a bending apparatus for pulling a work S having one end held by a rotary bending die 52.
The rotary bending die 52 rotates while pulling at 5. Thereby, the workpiece S is wound around the outer peripheral groove 59 of the rotary bending die, and is bent into a groove shape. At this time, when the workpiece S is pressed against the groove 60 in the vertically bent portion, the grip portion 58 of the tension bending device 55 slides in the vertical direction in accordance with the degree of bending of the groove. Then, the workpiece S is pulled so as not to come off the groove 60. Thereby, the workpiece S is correctly bent into a three-dimensional shape along the groove shape of the rotary bending mold 52.

By the way, in the bending apparatus,
Since the workpiece S is pressed against the rotary bending die 52 while being pulled, a large tension and moment acting toward the rotary bending die 52 act on the vertical support member 57 of the tension bending device. In addition, when the workpiece S is largely bent in the vertical direction, the vertical support member 57 must be taller so that the grip portion 58 can slide in the vertical direction according to the degree of bending. It is necessary to strengthen the vertical support member 57 and the rail 56 supporting the vertical support member 57.

Therefore, in the conventional bending apparatus,
There has been a problem that the vertical bending amount of the work material is limited. In addition, when increasing the amount of bending of the workpiece in the vertical direction, the vertical support member 57 and the entire apparatus must be enlarged or strengthened, and there is a problem that the price of the apparatus is increased and an installation space is required.

Further, as in the case of window frames of automobile doors, the left and right window frames having symmetrical bent shapes are processed by using two types of rotary bending dies having symmetrical bent shapes.
However, in the conventional bending apparatus, since the tension bending apparatus 55 is fixed at a position in a horizontal direction (left and right direction toward the rotary bending mold) orthogonal to the direction of the rotary bending mold 52, the rotary table is fixed. The positional relationship between the groove on the outer periphery of the rotary bending die and the tension bending device 55 is different between the case where the rotary bending die for the left window is attached to 53 and the case where the rotary bending die for the right window is attached. Therefore, two types of bending devices, one for the left window frame and one for the right window frame, are required, which increases equipment and processing costs and requires a large installation space for the two types of devices. There was also.

[0008]

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and it is possible to increase the amount of vertical bending of a material to be processed, and to suppress the increase in size and cost of the apparatus. An apparatus for bending a long object is provided. In addition, another object of the present invention is to provide a bending apparatus for a long object which can cope with the processing of two or more types of long objects having different bending shapes simply by replacing a rotary bending die.

[0009]

According to the invention described in claim 1 of the invention, one end of a long work piece is held in a rotary bending device provided with a rotary bending die, and A bending apparatus for rotating the rotary bending die while applying a constant tensile force to press the work material against the rotary bending die, wherein the rotary bending die is provided on a rotary table and holds one end of the work material. And a rotary bending device provided with a gripping part for holding the other end of the work piece while holding the other end of the work piece by the front part in such a manner that the front side rotates in the vertical direction corresponding to the shape of the rotary bending die. A pulling and bending device that is provided with a rotating arm that moves up and down in the direction of the rotary bending die, and that the slide member moves in the direction of the rotary bending die while applying a constant pulling force to the workpiece. The invention relates to a bending device for a long object characterized by comprising

According to the first aspect of the invention, since the end portion of the work piece moves up and down according to the vertical bending shape of the rotary bending die by the vertical movement of the rotary arm, the work piece is moved up and down. Even when the slide member is largely bent in the direction, it is not necessary to design the slide member to be tall and it is not necessary to enlarge the entire slide member. Therefore, the size of the device is not increased, the price increase of the device can be suppressed as much as possible, and the installation area of the device does not increase, so that the work place can be used efficiently.

According to the invention described in claim 2, in claim 1, the slide member is such that the slide member is capable of reciprocating in the direction of the rotary bending mold, and the slide arm is provided upright on the slide table. A rotation cylinder device, which is composed of an arm support member to be attached, and which rotates the rotation arm in a vertical direction is attached between an intermediate portion of the rotation arm and a lower portion of the slide member.

According to the second aspect of the invention, the rotating cylinder device for rotating the rotating arm in the vertical direction is provided between the intermediate portion of the rotating arm and the lower portion of the slide member. The slide member, the cylinder device, and the rotating arm form a kind of triangle, and the supporting of the rotating arm becomes stronger. As a result, the work piece can be greatly bent in the vertical direction, and it is not necessary to make the slide member so large for supporting the rotary arm.

According to a third aspect of the present invention, the slide base in the second aspect is a first slide base capable of reciprocating in the rotary bending die direction, and the rotary bending die direction on the first slide base. An arm supporting member is provided upright on the second slide base, which is composed of a second slide base provided so as to be capable of reciprocating in a horizontal direction orthogonal to each other.

According to the third aspect of the present invention, the rotary bending is performed even when bending is performed with different bending shapes (not limited to bilaterally symmetric shape changes, including cases where the bending degree is different). The positional relationship between the rotary bending die and the tension bending device, which is changed by exchanging the die, can be made correct by moving the second slide base in the horizontal direction orthogonal to the direction of the rotary bending die. Therefore,
One type of bending device can be used.

[0015]

DETAILED DESCRIPTION OF THE INVENTION The present invention will be described in detail below with reference to the accompanying drawings. FIG. 1 is a front view showing a bending process of a bending apparatus according to an embodiment of the present invention at the start of bending, FIG. 2 is a plan view of a main part thereof, and FIG. 3 is a front view showing a middle of the bending process of the same embodiment. 4 is a plan view of the main part, FIG. 5 is a front view showing the end of the bending process of the embodiment, FIG. 6 is a plan view of the main part,
FIG. 7 is a plan view showing a main part of a bending apparatus for bending in different directions.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION A bending apparatus 10 according to an embodiment of the present invention shown in FIGS. 1 and 2 comprises a rotary bending apparatus 21 and a tension bending apparatus 31. Reference numeral 11 denotes a base. In the rotary bending device 21, a rotary bending die 23 is detachably attached to a rotary table 22 that is rotated by a drive motor M. The rotary base 22 of this embodiment is rotated by a gear mechanism, and the rotation of the drive motor M is transmitted by the belt 24. By rotating the rotation of the drive motor M in the opposite direction, the rotary base 22 is rotated in the opposite direction. ing.

The rotary bending die 23 is for bending the workpiece S into a three-dimensional shape, and a groove 25 into which the workpiece S made of steel is fitted is formed in a desired bent shape on the outer periphery thereof. . As shown in FIG. 2, the groove 25 of this embodiment bends in the horizontal direction at a substantially intermediate position between the front end and the rear end of the groove, and also bends vertically from the horizontal bent portion 26 toward the rear end of the groove. I have. Numeral 27 is a vertically bent portion of the groove. At the front end of the groove 25, a chuck member is provided as a grip portion 28 for holding one end of the workpiece S. Note that the grip 28 may be provided on the turntable 22.

The tensile bending device 31 is for pressing the workpiece S against the rotary bending die 23 while pulling it, and is provided with a slide member 32 and a rotary arm 33. The slide member 32 includes a slide base 34 that can reciprocate in the direction of the rotary bending die 23, and an arm support member 35 that is erected on the slide base 34.

The slide table 34 is the first slide table 3
6 and the second slide base 37. The first slide base 36 is mounted on a first rail 38 provided on the base 11 toward the rotary bending die 23 so as to be able to reciprocate in the direction of the rotary bending die 23. In addition, the first slide base 3
A second rail 39 is arranged on the base 6 along a horizontal direction orthogonal to the direction of the rotary bending die 23, and the second slide base 37 is mounted on the second rail 39 in the horizontal direction orthogonal to the direction of the rotary bending die 23. It is mounted so that it can reciprocate.

A first cylinder device 40 is mounted between the first slide base 36 and the base 11 in parallel with the first rail 38, and between the first slide base 36 and the second slide base 37. A second cylinder device 41 is attached in parallel with the second rail 39.

The first cylinder device 40 is provided with a work material S.
To give a certain tensile force to the slide member 3
It operates so as to push the whole 2 in a direction away from the rotary bending die 23 with a predetermined force. On the other hand, in the second cylinder device 41, when the rotary bending die 23 is replaced with one having a different horizontal bending shape, the second slide base 37 is mounted together with the arm support member 35 and the rotary arm 33 on the second slide base 37. , For moving the rotary bending die in a horizontal direction orthogonal to the direction of the bending die 23, thereby making the positional relationship between the rotary bending die and the tension bending device appropriate.

The rotary arm 33 is for moving the end portion of the workpiece S in the vertical direction according to the shape of the rotary bending die 23, and the front portion 42 is directed toward the rotary bending die 23. A base 43 is pivotally attached to the arm support member 35 so as to be vertically rotatable. The rotation cylinder device 45 is attached between the attachment portion 43a of the rotation arm 33 and the intermediate portion 43b between the rotation arm front portion 42 and the lower portion of the slide member 32 (the lower portion of the arm support member 35 in this embodiment). Has been. Then, the rotating cylinder device 4
The front arm 42 side of the rotating arm 33 is rotated in the vertical direction by the operation of 5.

On the front part 42 of the rotary arm 33, a gripping part 46 for holding the end part of the workpiece S is attached via a swinging device 47. The gripping portion 46 is
It is composed of a chuck member that is opened and closed by a cylinder device 48 (shown in FIG. 2). Further, the swinging device 47 directs the gripping portion 46 in the up-down direction and the left-right direction according to the bending state of the workpiece S, and enables the workpiece S to rotate about the longitudinal direction of the workpiece S as a central axis. is there. In the swinging device 47 of this embodiment, the base of the gripping portion 46 is held by a shaft (not shown) orthogonal to the vertical direction and the horizontal direction so that the gripping portion 46 can rotate left and right and vertically. The base portion of the gripping portion 4 is inserted into the tubular portion 49 so as to be rotatable about the longitudinal direction of the workpiece S as a central axis.
6 is held. Reference numeral 50 denotes a heart-shaped member having a recessed rear portion, which is fixed to the upper end of the shaft in the vertical direction of the oscillating device 47. By pressing the recessed portion with a cylinder device 51, the left-right direction of the grip portion 46 is changed. It is an undo. Reference numeral 52 denotes a cylinder device for returning the vertical direction of the grip portion 46 to its original position.

The bending apparatus 10 thus constructed
Operates in the following manner when bending the workpiece S. First, as shown in FIGS. 1 and 2, the workpiece S is held at one end thereof by the grip portion 28 of the rotary bending die 23 and at the other end by the grip portion 46 of the rotary arm 33. Then, the workpiece S is pulled by the first cylinder device 40 of the tension bending device 31 with a predetermined force. At this time, in the tension bending device 31, the left and right positions of the second slide base 37 are adjusted by the second cylinder device 41 so that the rotary arm 33 is in a position corresponding to the rotary bending die 23 in advance.

With the workpiece S being pulled, the rotary bending die 23 is rotated in one direction by the rotation of the rotary table 22. As a result, the workpiece S is pressed against the rotary bending die 23 as shown in FIGS.
It is wrapped around the outer circumference. At this time, the first cylinder device 40 can move forward in accordance with the winding amount of the workpiece S around the rotary bending die 23 while the tension bending device 31 applies a predetermined tensile force to the workpiece S. Operate. Further, the oscillating device 47 is in a free state, so that no extra load is applied to the workpiece S.

When the workpiece S is pressed against the vertical bending portion 27 of the outer circumferential groove of the rotary bending die 23 by the rotation of the rotary bending die 23, as shown in FIGS. 5 and 6. Then, the rotation cylinder device 45 is operated to rotate the rotating arm 33 in the vertical direction according to the degree of bending (inclination) in the vertical bending portion 27.
As a result, the end of the workpiece S on the side of the rotary arm 33 moves in the vertical direction according to the degree of bending of the vertical bending portion 27 of the rotary bending die 23, and moves into the grooves 25 and 27 on the outer periphery of the rotary bending die 23. Pressed correctly and bent to the correct shape. Thereafter, the workpiece S is extended to the ends of the grooves 25 and 27.
Is stopped, the rotation of the rotary bending die 23 is stopped, and the bending of the workpiece S is completed. After the completion of the bending, the rotary bending device 21 and the tension bending device 31 are returned to the positions before the start of the bending by the operation of the motor M and the cylinder devices 40, 41, 45 and the like.

As described above, in the bending apparatus 10 of the present invention, even when the workpiece S is greatly bent in the vertical direction, it can be coped with by increasing the vertical rotation amount of the rotary arm 33. It is not necessary to raise the slide member 32. Further, since the slide member 32 does not need to be designed high according to the vertical bending amount of the workpiece S,
It is not necessary to increase the horizontal area so as to support the height, and it is possible to prevent the slide member 32 and the bending apparatus 10 as a whole from becoming large.

Further, in this embodiment, the slide member 32, the rotating cylinder device 45 and the rotating arm 3 are provided.
Since 3 and 3 form a triangle, the supporting strength of the rotating arm 33 is increased. Therefore, the rotation arm 33 can be stably supported by this, so that the workpiece S can be largely bent in the vertical direction without increasing the size of the slide member 32.

On the other hand, in the case of performing a bending work in a shape different from the above-mentioned bending, for example, in the case of performing a bending work in a symmetrical relationship with the above-mentioned bending shape, as shown in FIG. A rotary bending die 23A having a bending shape symmetrical to the die 23 is attached to the rotary table 22, and the second slide table 37 is slid by a second cylinder device 41 in a horizontal direction orthogonal to the direction of the rotary bending die 23A. Then, the second slide base 37 in FIG. 2 is moved to the opposite side. Then, in the same manner as described with reference to FIGS. 1 to 6, while the work material S is pulled between the rotary bending die 23A and the rotary arm 33, the rotary bending die 23A is pulled.
Is rotated in the direction opposite to that of FIGS. Thereby, the workpiece S is pressed against the rotary bending die 23A, and when the workpiece S is pressed against the vertically bent portion 27A of the rotary bending die 23A outer peripheral groove 25A, the rotating arm 33 is moved. The workpiece S is bent in the vertical direction.

[0030]

As shown and described above, in the bending apparatus according to the first aspect of the present invention, the rotary arm for moving the end portion of the work piece up and down is reciprocally movable in the rotary bending die direction. Since it is provided in the member, the work piece can be largely bent in the vertical direction without increasing the size of the device. In addition, by preventing an increase in size of the device, it is possible to suppress an increase in the price of the device, and since the installation place of the device is not taken, the economic effect is high.

Further, in the bending apparatus according to the second aspect, since the slide member, the rotation cylinder device and the rotation arm form a triangle, the support strength of the rotation arm is increased and the slide member is enlarged. The work piece can be bent more vertically without doing so.

Further, in the bending apparatus according to the third aspect, in addition to the above-mentioned effect, bending processing with different bending shapes can be dealt with by simply exchanging the rotary bending die, so that various types of bending apparatus can be used. Since there is no need for a bending device, it is economical and the number of installation places for the device is small, so there is an effect that the work site can be used efficiently.

[Brief description of drawings]

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

FIG. 2 is a plan view of a main part of FIG.

FIG. 3 is a front view showing the bending process of the example.

FIG. 4 is a plan view of a main part of FIG.

FIG. 5 is a front view showing the vicinity of the end of the bending process of the embodiment.

FIG. 6 is a plan view of a main part of FIG.

FIG. 7 is a plan view showing a main part of a bending apparatus for performing bending in different directions.

FIG. 8 is a front view showing an outline of a conventional bending apparatus.

[Explanation of symbols]

 10: Bending device 21: Rotating bending device 22: Rotating table 23, 23A: Rotating bending die 28: Rotating bending die gripper 31: Tensile bending device 32: Slide member 33: Rotating arm 34: Sliding table 35: Arm support Member 36: First slide base 37: Second slide base 43b: Intermediate part of rotary arm 45: Cylinder device for rotation 46: Grip of rotary arm S: Work material

Claims (3)

[Claims] 1. A rotary bending die, which holds one end of a long work piece in a rotary bending device equipped with the rotary bend die, and rotates the rotary bend die while applying a constant tensile force to the work piece. A bending apparatus for pressing a work material, comprising a rotary bending die on a rotating table, and a rotary bending apparatus provided with a gripping portion for holding one end of the work material, and the other end of the work material. A slide member capable of reciprocating in the direction of the rotary bending die, while holding the front portion of the rotary arm in a direction corresponding to the shape of the rotary bending die by rotating the front side in the vertical direction and moving the other end of the workpiece up and down. In preparation for the above, the apparatus for bending a long object is characterized in that the slide member comprises a tension bending device that moves in the direction of the rotary bending mold while applying a constant tension force to the workpiece. 2. The slide member according to claim 1, wherein the slide member is composed of a slide base reciprocally movable in a rotary bending die direction, and an arm support member which is erected on the slide base and to which a rotary arm is attached. A bending device for a long object, wherein a rotating cylinder device for rotating the rotating arm in a vertical direction is attached between an intermediate portion of the rotating arm and a lower portion of the slide member. 3. The first slide table according to claim 2, wherein the slide table is capable of reciprocating in a rotary bending mold direction, and the first slide table is capable of reciprocating in a horizontal direction orthogonal to the rotary bending mold direction. It consists of the second slide stand installed in
An apparatus for bending a long object in which an arm support member is erected on the second slide base.