JPH0716718B2 - Bending device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a bending device for bending a long workpiece into a zigzag shape.

[Prior Art] Conventionally, as a method for bending a work piece into a zigzag shape, as disclosed in JP-A-62-267024, it is composed of a pressure die, a bending die, and a fastening die according to a right-bent shape. A right bending jig and a left bending jig including a pressure die, a bending die, and a tightening die according to the left bending shape were provided. Then, when bending to the right, move the right bending jig to the position corresponding to the center of the right bending and perform right bending.If left bending, move the left bending jig to left bending. It was moved to a position according to the processing center and bent into a kudzu shape.

[Problems to be Solved by the Invention] However, in such a conventional bending apparatus, the right bending jig and the left bending jig are moved to positions corresponding to respective bending centers according to the bending direction. . for that reason,
Large and heavy left and right bending jigs each consisting of pressure type, bending type and tightening type must be moved as they are,
There is a problem that the device is complicated and large.

Therefore, the present invention aims to solve the above problems,
An object of the present invention is to provide a small bending device that bends a workpiece with a simple configuration.

[Means for Solving the Problems] In order to achieve the above object, the present invention has the following configurations as means for solving the problems. That is, in a bending device that bends a long workpiece to the right and centered around the bending center and bends it to the left, a right bending according to the right bending shape of the workpiece. A die and a left bending die corresponding to the left bending shape are erected with the workpiece to be sandwiched therebetween, and a supply mechanism for supplying the workpiece between the bending dies is provided. A bending die moving mechanism for sandwiching the workpiece by moving the bending dies along a longitudinal direction of the workpiece and selectively moving the bending dies to a position according to the bending direction, A bending die switching mechanism is provided which moves in a direction substantially orthogonal to the moving direction of the moving mechanism and selectively switches the bending die corresponding to the bending direction to a position corresponding to the bending center. Having a mold rotation mechanism that rotates the mold around Structure of the bending device and symptoms is it.

[Operation] In the bending device having the above configuration, the supply mechanism supplies the workpiece between the bending dies, and the bending die moving mechanism moves the bending dies along the longitudinal direction of the workpiece. , The two bending dies are selectively moved to positions according to the bending direction to clamp the workpiece to be supplied. And the bending type switching mechanism
By moving in a direction substantially orthogonal to the moving direction of the bending die moving mechanism, the bending die corresponding to the bending direction is selectively switched to a position corresponding to the bending center. Further, the forming die rotating mechanism rotates the forming die around the bending center and moves the forming die around the bending die corresponding to the bending direction to bend the workpiece in the bending direction. To do. This is repeated according to the left-right bending direction, and the work piece is bent in a zigzag shape.

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

FIG. 1 is a schematic configuration diagram of a bending apparatus that is an embodiment of the present invention. Reference numeral 1 denotes a long work piece, and in the present embodiment, a flat aluminum perforated tube of a condenser used in a cooling cycle or the like. A right bending die 2 and a left bending die 4 are arranged so as to be sandwiched on both sides of the workpiece 1. As shown in FIG. 2 (a), the right bending die 2 has a processing portion 2a corresponding to the right bending shape when the workpiece is bent to the right, and the right bending die 2 is bent to the right. It is formed so that a predetermined right bent shape can be obtained when the workpiece 1 is wound around the center RC. Also, the second
As shown in the figure (b), the left bending die 4 has a processing portion 4a corresponding to the left bending shape when the work piece is bent to the left, and the work piece along the left bending die 4 is processed. It is formed so that a predetermined left bent shape can be obtained when 1 is wound. Further, the two bending dies 2 and 4 are respectively provided with a holding portion so that the workpiece 1 sandwiched between the two bending dies 2 and 4 can be held.
2b and 4b are formed.

The right bending die 2 is fixed on the right moving table 6, and the right moving table 6 is slidably supported by the right guide member 8 arranged along the longitudinal direction of the workpiece 1. The cylinder 9 slides back and forth along the right guide member 8. In addition, the left bending die 4 is a left moving table.
The left moving table 10 is fixed on the left guide member 12 slidably supported by a left guide member 12 arranged along the longitudinal direction of the workpiece 1, and is moved along the left guide member 12 by a cylinder 13. It is designed to be slid back and forth.

Further, depending on the bending direction, in the case of right bending, the cylinder 9 is driven to move the moving table 6 forward, and the cylinder 13 is driven to move the moving table 10 as shown in FIG. A stopper (not shown) is provided so that the right bending die 2 is moved forward and is placed in front of the left bending die 4 in accordance with the right bending process. Further, in the case of left bending, as shown in FIG. 2B, both cylinders 9 and 13 are driven to move both moving bases 6 and 10 so that the left bending die 4 is more than the right bending die 2. A stopper (not shown) is arranged so as to be arranged according to the left bending process in the front. The position of the right bending center RC of the right bending die 2 advanced during right bending and the position of the left bending center LC of the left bending die 4 advanced during left bending are described later. The positions of the forward ends thereof are the same so that the positions coincide with the machining center C.

Further, on a rocking table 16 described later, cylinders 17a and 17b are attached to opposite sides of the tip thereof, respectively, and when both cylinders 17a and 17b are driven, the two movable bases 6 and 10 are moved to the side. Push from one side to the other side of the bending molds 2 and 4, and the clamping portion 2b,
The workpiece 1 can be clamped by 4b. The left and right moving stands 6,10, left and right guide members 8,12, cylinders 9,1
3. The bending dies moving mechanism 14 is configured by the cylinders 17a and 17b, and the bending dies 2 and 4 can be selectively arranged according to the left and right bending processes.

The left and right guide members 8 and 12 are placed on a swing table 16, and the swing table 16 is attached to a pin 18 provided upright on a main body (not shown) in the moving direction of the left and right moving tables 6 and 10. It is rockably supported in a substantially orthogonal direction. Further, a joint 20 is fixed to the swing table 16, and a joint 26 attached to a rod of a clevis cylinder 24 is connected to the joint 20 via a pin 22.

The clevis-type cylinder 24 is connected via a pin 28 to a bracket 29 fixed to a main body (not shown). When the clevis-type cylinder 24 is driven in the direction of arrow A or B in FIG. 1, the swing table 16 is swung about the pin 18 so that the position of the bending center C and the position at the time of right bending are changed. The right bending center 2 of the right bending die 2 in the state of FIG. 2 (a) is aligned with the right bending center RC, or left bending of the left bending die 4 in the state of FIG. 2 (b) during left bending is performed. Center LC
It is configured so that and can be moved to match. The swing table 16, the joint 20, the pin 22, the clevis type cylinder 24, and the joint 26 constitute a bending type switching mechanism 31. Although the swing table 16 is swung in the present embodiment, it may be configured to move in parallel.

Further, a rail 32 is laid on the swing table 16 along the longitudinal direction of the workpiece 1, and a supply table 34 slidable while being guided by the rail 32 is provided. The fixing member 36 is fixed to the supply table 34, and the fixing member 36 is also fixed.
A guide member 38 is fixed to 36. This guide member 38
Inside, a pair of clamp members 40, 42 are provided,
One clamp member 40 is fixed to the guide member 38, and the other clamp member 42 is slidable toward the one clamp member 40. The other clamp member 42 is driven by a cylinder 44 attached to the guide member 38 so that the workpiece 1 can be clamped.

Further, a bracket 45 is further fixed to the fixing member 36, and a rod of a cylinder 46 is screwed into and integrated with the bracket 45. The cylinder 46
Is fixed to the swing table 16 via a fixing block 48, drives the cylinder 46, and moves the supply table 34 to the arrow D in FIG.
It can be moved back and forth in the E direction. Of these, rail 32, supply table 34, fixing member 36, guide member 38,
The clamp members 40 and 42, the cylinder 44, the bracket 45, and the cylinder 46 constitute a supply mechanism 50.

On the other hand, on the swing table 16, a pair of rollers 52, 54 erected rotatably in contact with both side surfaces of the workpiece 1 are further provided.
And a roller 56 rotatably supported in contact with the lower surface of the workpiece 1.

Further, a turning table 62 having a turning shaft 60 which turns about the bending center C is arranged in the directions of arrows F and G in FIG. 1, and the turning amount thereof is, in this embodiment, For the sake of simplicity, the angle is set to 180 degrees, but a springback amount may be taken into consideration. One end of an L-shaped bracket 64 formed so as to avoid interference with the work piece 1, both bending dies 2, 4, etc. is fixed to the rotary shaft 60. This L
A base 66 is fixed to the other end of the die bracket 64, and the base 66 is attached to the base 2 along the longitudinal direction of the workpiece 1.
Book rails 68 are laid. And this rail 68
A slide base 70 is slidably supported on the rail 68 along the rail 68. Further, the rod of the cylinder 74 attached to the base 66 is screwed into the sliding base 70.
By driving 74, the slide base 70 can be slid in the longitudinal direction of the workpiece 1 in the directions of arrows H and I in FIG.

An upper and lower base 76 is slidably supported on the sliding base 70 in a direction along the bending center C, and a rod of a cylinder 78 attached to the sliding base 70 is screwed into the upper and lower base 76. Has been done. Further, the molding die 80 is fixed to the upper and lower pedestals 76, and the molding die 80 is left and right when the molding die 80 is rotated around both the processing portions 2a, 4a of the both bending dies 2, 4. It is configured to be bent. When the cylinder 78 is driven, the upper and lower pedestals 76 are moved along the bending center C in FIG.
It is designed to be moved up and down in the K direction.

Further, in the present embodiment, as for the position of the forming die 80, for example, as shown in FIG. 2 (a), the center 80a of the forming die 80 is more than the right bending center RC of the right bending die 2 at the time of right bending. Is also located at the front position. When the right bending process is completed, the center 80a of the forming die 80 is located behind the right bending center RC of the right bending die 2 and moves a distance L across the right bending center RC. . In this state, as shown in FIG. 2 (b), when shifting to the left bending process, the forming die 80 is moved by a distance L so as to come out in front of the left bending center LC of the left bending die 4. There is a need to. The same applies when shifting from left bending to right bending. Therefore, the cylinder 74 is driven to slide the slide base 70 by the distance L so that the molding die 80 can be moved according to the bending direction. This makes it possible to reduce a step between the front and rear ends of the bending dies 2 and 4 during bending, and prevent a bending defect in which the workpiece 1 bulges outward.

Further, the forming die 80 can be lowered along the bending dies 2 and 4, and the work piece 1 can be clamped together with the bending dies 2 and 4 or raised to release the clamping. The L
In the mold bracket 64, along the longitudinal direction of the workpiece 1,
A table 82 that supports the lower surface of the workpiece 1 is fixed. The rotary table 62, the L-shaped bracket 64, the base 66, the rail 68, the sliding base 70, the cylinder 74, the upper and lower bases 76, the cylinder 78, and the table 82 constitute a mold rotary mechanism 84.

Next, the operation of the bending apparatus of this embodiment described above will be described.

First, the two bending dies 2 and 4 drive the cylinders 9 and 13 to retract them in the direction away from the bending center C. And
A long workpiece 1 preliminarily cut into a predetermined length is inserted between a pair of clamp members 40, a cylinder 44 is driven, and the other clamp member 42 is directed toward one clamp member 40. The workpiece 1 is clamped by both clamp members 40 and 42. Then, as shown in FIG.
The workpiece 1 is in a state of protruding from the both bending dies 2 and 4 by a predetermined amount according to the bending shape.

Next, the cylinders 9 and 13 are driven to move both bending dies 2 and 4 in accordance with the bending direction. For example, when bending to the left first, as shown in FIG. 3 (b), first, the cylinders 9 and 13 are driven so that the left and right bending dies 2 and 4 are arranged according to the left bending process. That is, the left bending die 4 moves to a state in which it is in front of the right bending die 2. Then, the cylinders 17a and 17b are driven, and the workpiece 1 is held between the bending dies 2 and 4.

On the other hand, at this time, the oscillating table 16 drives the cylinder 24 to oscillate the oscillating table 16 so that the bending center C and the left bending center LC of the left bending die 4 coincide with each other. . Then, the cylinder 74 is driven to move the slide base 70 to the arrow H.
Slides in the direction and drives the cylinder 78,
With 74, lower the forming die 80 along the left bending die 4,
As shown in FIGS. 1 and 3 (b), the work piece 1 is held by the forming die 80 and the left bending die 4. Next, the rotary table 62 is rotationally driven in the direction of arrow G to rotate the forming die 80 around the bending center C, and the processing portion 4a of the left bending die 4 is rotated.
Wrap the work piece 1 around, and as shown in FIG.
The workpiece 1 is bent to the left.

When the left bending is completed, next, the cylinder 78 is driven to raise the forming die 80 in the arrow J direction, and the cylinder 74 is driven in preparation for the next bending in the right direction. The mold 80 is advanced. Further, the cylinders 17a and 17b are driven to release the clamping of the workpiece by the bending dies 2 and 4, and the cylinders 9 and 13 are driven to retract the bending dies 2 and 4.

Then, in order to perform bending in the right direction, as shown in FIG. 3D, the cylinder 46 is driven to advance the clamp members 40, 42 holding the workpiece 1 in the direction of arrow D. Then, the workpiece 1 is supplied in a predetermined amount and protruded from both the bending dies 2 and 4. Further, when the clevis type cylinder 24 is driven to swing the swing table 16 in the direction of arrow A and the right bending die 2 is moved forward, the right bending center RC is brought to a position where it coincides with the bending center C. Then, the right bending die 2 is selectively switched to a position corresponding to the bending center C.

Then, the cylinders 9 and 13 are driven to move both bending dies 2 and 4 forward so that the right bending center RC and the bending center C of the right bending die 2 are moved as shown in FIG. Match and arrange according to right bending. Further, the cylinders 17a and 17b are driven to hold the work piece 1 by the two bending dies 2 and 4, and the cylinder 78 is driven to lower the forming die 80 to form the forming die 8 and the right bending die 2. The workpiece 1 is clamped by. Cylinder
44 is driven to move the clamp member 42 to release the clamping of the workpiece 1, and the cylinder 46 is driven to retract the pair of clamp members 40, 42.

Then, the rotary table 62 is rotationally driven in the direction of arrow F,
The workpiece 1 is wound around the processing center 2a of the right bending die 2 around the bending center C of the forming die 80, and as shown in FIG. Right bend according to the shape.

After the right bending process is completed, the forming die 80 is raised again, the both bending dies 2 and 4 are retracted to release the clamping of the workpiece 1, and the swing table 16 is swung in the direction of the arrow B. The above-described operation shown in FIG. 3A is repeatedly executed to bend the workpiece 1 in a zigzag shape.

As described above, the bending apparatus of this embodiment has the left and right bending dies 2 and 4 according to the left and right bending shapes, and the left and right bending dies 2 and 4 are selectively left and right depending on the left and right bending directions. The workpiece 1 is clamped by both bending dies 2 and 4 while being arranged. Then, the rocking table 16 is rocked in accordance with the bending direction, and the two bending dies 2, 2 are selectively placed at a position corresponding to the bending center C.
Switch 4

Therefore, the work piece 1 can be clamped by the two bending dies 2 and 4 and can be bent into left and right bending shapes.
Since the swing table 16 is swung to selectively switch the bending dies 2 and 4 according to the bending direction, the structure of the device is simplified and downsized.

The present invention is not limited to the embodiments as described above, and can be implemented in various modes without departing from the gist of the present invention.

[Effects of the Invention] As described in detail above, in the bending apparatus of the present invention, the bending die moving mechanism selectively moves both bending dies according to the bending direction, and holds the workpiece by both bending dies. Bending can be performed into left and right bending shapes, and since both bending dies are switched according to the bending direction by the bending die switching mechanism, the configuration of the device can be simplified and the size can be reduced.

[Brief description of drawings]

FIG. 1 is a schematic perspective view of a bending apparatus as an embodiment of the present invention, FIG. 2 is an explanatory view of right bending processing and left bending processing of this embodiment, and FIG. 3 is a processing sequence of this embodiment. FIG. 1 ... Workpiece, 2 ... Right bending type 4 ... Left bending type, 14 ... Bending type moving mechanism 16 ... Swing table, 31 ... Bending type switching mechanism 40, 42 ... Clamping member 50 ... … Supply mechanism, 62 …… Rotating table 80 …… Molding die, 84 …… Molding die rotating mechanism

Claims (1)

[Claims] 1. A bending device for bending a long work piece rightward and leftward around a bending center to form a zigzag shape according to the right bend shape of the work piece. A right bending die and a left bending die corresponding to a left bending shape are erected so as to sandwich the workpiece, and a supply mechanism for supplying the workpiece between the bending die is provided. Is provided with a bending die moving mechanism for sandwiching the workpiece by moving the bending dies along a longitudinal direction of the workpiece and selectively moving the bending dies to a position corresponding to the bending direction. And a bending die switching mechanism for selectively switching the bending die corresponding to the bending direction to a position corresponding to the bending center, by moving the bending die in a direction substantially orthogonal to the moving direction of the bending movement mechanism. Equipped with a mold rotation mechanism that rotates the mold around the machining center Bending apparatus characterized and.