JPH0811255B2 - Multi-head bending device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of use] The present invention relates to a multi-head bending apparatus for bending a workpiece.

[Prior Art] Conventionally, as one of the multi-head bending devices, for example, there is a device for performing a crooking process in which left and right bending are alternately performed. For this purpose, generally known is a bending device for bending an object to be processed, for example, an automobile radiator pipe or the like. As shown in FIG. 4, this bending apparatus is operated by the following operations. First, the pipe W, which is a workpiece, is supplied to the right bending jig R of the bending apparatus, and the pipe W is connected to the right bending jig R.
It is held by the bending die R1 and the fastening die R2. Further, a pressure die R3 for receiving the bending reaction force is also provided (FIG. 4 (A)). Next, when the holding is completed, the bending die R2 is rotated in the arrow F direction around the point r of the bending die R1 together with the tightening die R2, and right bending is performed (FIG. 4 (B)). When the right bending is completed, a predetermined amount of the pipe W is supplied, the right bending jig R is replaced with a left bending jig L, and the pipe W is held by a bending die L1 and a fastening die L2. Also, a pressure type for receiving bending reaction force.
L3 is also installed (Fig. 4 (C)). When holding is finished,
The bending die L1 is rotated in the direction of arrow G around the point 1 of the bending die L1 together with the tightening die L2 to perform left bending (FIG. 4 (D)). The center of rotation l at this time and the center of rotation r for right bending
The position is different from that by the bending diameter. When the left bending is completed, a predetermined amount of pipe W is supplied again, the left bending jig L is replaced with the right bending jig R, and the right bending is repeated (FIG. 4 (E)). The operation described above is repeated, and the pipe W is bent in a crooked manner.

[Problems to be Solved by the Invention] However, in such a conventional bending apparatus, in order to improve the processing efficiency, a plurality of work pieces or a wide work piece are arranged vertically, and a bending die and a fastening die are used. When sandwiched and bent, there is a problem that the bending die and the clamping die are bent, and it is difficult to accurately bend a plurality of workpieces or a wide workpiece.

Therefore, the present invention has been made to solve the above problems, and an object thereof is to provide a multi-head bending apparatus for appropriately bending a workpiece.

Structure of the Invention [Means for Solving Problems] In order to achieve the above object, the present invention has the following structures as means for solving the problems. That is, a multi-headed bending apparatus including two or more bending means for bending a work piece, wherein the bending means includes a bending die and a clamping die for holding a plurality of work pieces,
A bending jig that is rotationally driven to rotate the fastening die around the bending die to perform bending, and a tip of the bending die and the fastening die of the bending jig is clamped,
A clamp unit rotatable about the center of rotation of the bending jig; and a driving unit for rotationally driving the bending jig and the clamp unit so as to be synchronously rotatable in the same direction. In addition, the configuration of the multi-headed bending apparatus is provided with the moving means that selects two or more bending means according to bending work and moves relatively to the bending position of the workpiece.

Here, the moving means may be any means as long as it moves the bending means and the work piece relative to each other, such as moving the bending means to the bending position or moving the work piece to the bending position. You can do it.

[Operation] The multi-headed bending device having the above-described configuration includes two or more bending means including a bending jig, a clamp part, and a driving means, and the moving means selects the two or more bending means according to bending work. Bending is performed by moving relative to the bending position of the work piece. This bending means holds a plurality of workpieces by a bending die and a clamping die, and clamps the tips of the bending die and the clamping die by a clamp portion rotatable about the pivot center of the bending jig. The bending jig and the clamp portion are rotationally driven by a driving means that connects the bending jig and the clamp portion so as to be synchronously rotatable in the same direction, and bending is performed.

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

FIG. 1 is a front view of a multi-head bending apparatus which is an embodiment of the present invention, FIG. 2 is a top view of the same, and FIG. 3 is a left side view of the same. This multi-head bending device is installed in parallel with a left bending device 1 and a left bending device 1 for left bending the three pipes W of an automobile radiator as a workpiece, and a right bending device for right bending the pipe W. 2, a left bending device 1 and a right bending device 2 are configured to include a moving device 4 that moves in accordance with the bending direction, and a table device 5 that rotates with bending.

Here, the left bending device 1 for performing the left bending process includes a left bending jig 6 that holds three pipes W, a left jig supporting device 8 that rotatably supports the left bending jig 6, and a left jig supporting device. Via a left jig elevating device 10 that elevates and lowers the device 8, a left clamp device 12 that clamps the left bending jig 6, a left clamp support device 14 that rotatably supports the left clamp device 12, and a left jig support device 8. The left bending jig 6 and a left driving device 16 for simultaneously rotating and driving the left clamping device 12 via a left clamp supporting device 14.

The left bending jig 6 is applied to a left bending die 18 having an outer diameter corresponding to the bending radius, a left tightening die 20 that slides by a hydraulic cylinder (not shown) and holds the pipe W together with the left bending die 18, and a pipe W. It is composed of a left pressure die 22 and the like that are in contact with each other and receive a bending reaction force. The left bending jig 6 slides on the left tightening die 20 and holds the pipe W together with the left bending die 18.

Further, the left jig supporting device 8 is provided with a left bearing portion 26 which rotatably supports the sprocket 24 at its lower portion. The sprocket 24 is configured to be splined with a left jig main shaft 28 that rotates together with the left bending jig 6. As a result, when the left jig support device 8 is lifted by the left jig lifting device 10 and the left jig main shaft 28 is also lifted, the left jig main shaft 28 and the sprocket 24 are spline-connected. The rotation of the sprocket 24 is transmitted to the left jig spindle 28. Therefore, when the sprocket 24 rotates, the left bending jig 6 rotates.

Further, the left jig elevating device 10 is fitted to the left elevating base 30 on which the left jig supporting device 6 is placed, four linear motion bearings 32 mounted on the back surface of the left elevating base 30, and the linear motion bearing 32. 2 arranged in the vertical direction
It is composed of a book rail 34 and a left lifting hydraulic cylinder 36 having a rod fixed to the left lifting base 30. The left jig elevating device 10 drives the left elevating hydraulic cylinder 36 to elevate the left elevating base 30 and elevate the left jig supporting device 6 together with the left elevating base 30.

Left clamp device 12 for clamping the left bending jig 6
Is composed of a pair of clamp claws 38, 40 for clamping the tips of the left bending mold 18 and the left tightening mold 20 of the left bending jig 6, a hydraulic cylinder 42 sliding the clamp claws 38, 40, and the like. ing. When the left clamp device 12 drives the hydraulic cylinder 42, a pair of clamp claws 38 and 40 are slid. The tips of the left bending die 18 and the left tightening die 20 are clamped by the clamp claws 38, 40.

The left clamp support device 14 that rotatably supports the left clamp device 12 includes a left clamp main shaft 44 and a left clamp main shaft 44 that are rotatably supported with the left clamp device 12 fixed at one end. It is composed of a sprocket 46 and the like fitted in. When the sprocket 46 is rotated, the left clamp device 12 is rotated via the left clamp main shaft 44.

The left drive device 16 that rotationally drives the left bending jig 6 and the left clamp device 12 is a DC servo motor 4 that is a rotary drive source.
8, the sprocket 50 fitted to the rotary shaft of the DC servo motor 48, the silent chain 52 one side of which is attached to the sprocket 50, the sprocket 54 engaged with the other of the silent chain 52, and the sprocket 54 Left rotating shaft 56
And so on. Further, a sprocket 58 fitted to the lower end of the left rotation shaft 56, a silent chain 60 stretched between the sprocket 58 and the sprocket 24,
A sprocket 62 fitted on the upper end of the left rotation shaft 56, and a silent chain 64 stretched between the sprocket 62 and the sprocket 46 are also arranged. Here, the tooth number ratio between the sprocket 24 and the sprocket 58 and the sprocket 46
And the sprocket 106 have the same tooth ratio. When the DC servomotor 48 is rotationally driven, the left drive device 16 rotates the left rotary shaft 56 via the sprocket 50, the silent chain 52, and the sprocket 54. Further, by the rotation of the left rotation shaft 56, the sprocket 24 is rotated via the sprocket 58 and the salento chain 60 fitted and inserted in the lower end. Further, due to the rotation of the left rotation shaft 56, the sprocket 46 is rotated via the sprocket 62 fitted on the upper end and the salent chain 64. In this way, the DC servo motor 48 causes the sprocket 24 and the sprocket 46 to rotate simultaneously at the same rotational speed via the left rotation shaft 56. Therefore, the left drive device 16
Transmits the rotation of the DC servo motor 48 to the left bending jig 6 via the left jig supporting device 8, and at the same time transmits the same rotation number to the left clamp device 12 via the left clamp supporting device 14.

The right bending device 2 that performs right bending in the opposite direction to the left bending device 1 described above is configured symmetrically with the left bending device 1 and has a right bending jig 66 that holds three pipes W and a right bending jig. A right jig support device 68 for rotatably supporting the tool 66, a right jig lifting device 70 for lifting the right jig support device 68, a right clamp device 72 for clamping the right bending jig 66, and a right clamp device 72. Right clamp support device 74 and right bending jig 66 that rotatably support
Through the right jig support device 68 and the right clamp device 72
Is composed of a right driving device 76 that simultaneously rotates and drives the right clamping support device 74.

The right bending jig 66 is configured symmetrically with the left bending jig 6, and includes a right bending die 78, a right tightening die 80, a right pressure die 82 and the like. In addition, the right jig support device 68 is the left jig support device 8
Similarly, a sprocket 84, a right bearing portion 86, and a right jig main shaft 88 are arranged. Further, the right jig lifting device 70 has the same structure as the left jig lifting device 10, and is composed of a right lifting base 90, four linear motion bearings 92, two rails 94, and a right lifting hydraulic cylinder 96. .

Right clamp device 72 for clamping the right bending jig 66
Has the same structure as the left clamp device 12, and is composed of a pair of clamp claws 98, 100, a hydraulic cylinder 102, and the like.
A right clamp support device 74 that rotatably supports the right clamp device 72 has the same configuration as the left clamp support device 14, and includes a right clamp main shaft 104, a sprocket 106, and the like.

The right driving device 76 that rotationally drives the right bending jig 66 and the right clamping device 72 is configured symmetrically with the left driving device 16,
It is composed of a DC servo motor 108, a sprocket 110, a silent chain 112, a sprocket 114, a right rotating shaft 116, and the like. In addition, the sprocket 118,
The silent chain 120 is further provided with a sprocket 122 and a silent chain 124 at the upper end of the right rotation shaft 116. Here, as with the left bending device 1, the sprocket 84
And the sprocket 118 have the same tooth ratio, and the sprocket 106 and the sprocket 122 have the same tooth ratio.

The respective devices of the right bending device 2 thus configured operate in the same manner as the respective devices of the left bending device 1.

The moving device 4 that moves the left bending device 1 and the right bending device 2 according to the bending direction is attached to the moving base 126 and the moving base 126 on which the left bending device 1 and the right bending device 2 are placed in parallel. 4 linear motion bearings 128,
Two rails 130 fitted to four linear motion bearings, an internal thread 132 fixed to the moving base 126, an external thread 134 screwed into the internal thread 132 to form a ball screw together with the internal thread 132, A fixed base 136 to which a rail 130 of a book is fixed and a male screw 134 is rotatably supported,
A sprocket 138 fitted to one end of the male screw 134, a silent chain 140 attached to one end of the sprocket 138,
It is composed of a sprocket 142 engaged with the other of the silent chain 140, and a DC servo motor 144 having a rotation shaft fitted to the sprocket 142 and placed on a fixed base 136. The moving device 4 rotationally drives the DC servo motor 144 to rotate the male screw 134 via the sprocket 142, the silent chain 140, and the sprocket 138, and the female screw 132.
To move the moving base 126 through.

The table device 5 that rotates with the bending process is a pipe W.
A table body 146 rotatably supported by a fixed base about the bending position of the table, a large gear 148 attached to the lower surface of the table body 146 along the outer periphery, and a small gear 150 meshed with the large gear 148, It is composed of a DC servomotor 152 having a rotary shaft fitted in a small gear 150. The table device 5 rotationally drives the DC servo motor 152 to rotate the large gear 148 via the small gear 150 and the table body 146 integrated with the large gear 148.

In the multi-headed bending apparatus of the present embodiment having the above-mentioned configuration, when the pipe W is supplied to the bending position, the pipe W is processed in a crooked manner. The DC servo motor 144 is rotationally driven to move the moving base 126 in the direction of arrow A in FIG. 2, and the left bending device 1 placed on the moving base 126 is moved to the position of the pipe W. Next, the left lifting hydraulic cylinder of the left jig lifting device 10.
36 is driven to raise the left bending jig 6 together with the left jig supporting device 8. Further, the left bending die 18, the left tightening die 20, of the left bending jig 6,
The left pressure die 22 holds the pipe W, and then the hydraulic cylinder 42 of the left clamp device 12 is driven to set a pair of clamp claws.
The left bending die 18 and the left tightening die 20 are clamped by 38 and 40. After clamping, the DC servomotor 48 of the left drive device 16 is driven to rotate the left bending jig 6 leftward via the left jig support device 8, and at the same time as this rotation, the left clamp device 14 via the left clamp support device 14. 12 is also rotated counterclockwise at the same number of revolutions to perform left bending. The table body 146 of the table device 5 is rotated counterclockwise in synchronization with this left bending process.

After processing, the clamp between the left bending die 18 and the left tightening die 20 by the left clamp device 12 is released. Further, the holding of the pipe W by the left bending jig 6 is also released, and the left jig lifting device 10 lowers the left bending jig 6 together with the left jig supporting device 8 to return each device to the position before processing.

Further, since the pipe W is processed into a fold, when the right bending is performed after the above-described left bending, the pipe W
And a DC servo motor for the moving device 4
The 144 is rotationally driven to move the moving base 126 in the direction of arrow B in FIG. 2, and the right bending device 2 mounted on the moving base 126 is moved to the position of the pipe W. Next, the right lifting hydraulic cylinder 96 of the right jig lifting device 70 is driven to lift the right bending jig 66 together with the right jig supporting device 68. Further, the pipe W is held by the right bending die 78, the right tightening die 80, and the right pressure die 82 of the right bending jig 66, and then the hydraulic cylinder 102 of the right clamp device 72 is driven, and the pair of clamp claws 98, 100 are used. The right bending die 78 and the right tightening die 80 are clamped (the state shown in FIGS. 1 to 3). After clamping, DC servo motor 108 of right drive 76
The right bending jig 66 is rotated right through the right jig support device 68, and at the same time, the right clamp device 72 is rotated right through the right clamp support device 74 at the same rotation speed. Bend. The table body 146 of the table device 5 is rotated to the right in synchronization with this right bending process.

After processing, the clamp between the right bending die 78 and the right tightening die 80 by the right clamp device 72 is released. Further, the holding of the pipe W by the right bending jig 66 is also released, and the right jig lifting device 70 lowers the right bending jig 66 together with the right jig supporting device 68 to return each device to the position before processing.

As described above, according to the multi-head bending device of this embodiment,
During the left bending process, the pipe W is held by the left bending jig 6, the left bending jig 6 is clamped by the left clamp device 12, and the left bending device 6 and the left clamp device 16 are clamped by the left driving device 16.
12 and synchronized with left rotation to perform left bending. Simultaneously with this counterclockwise rotation, the table device 5 is counterclockwise rotated. During the right bending process, the pipe W is held by the right bending jig 66, the right bending jig 66 is clamped by the right clamp device 72, and the right bending device 66 and the right clamp device 72 are clamped by the right driving device 76.
Rotate to the right in synchronization with 72 and perform right bending. Simultaneously with this right rotation, the table device 5 is rotated right. In this way, when bending the pipe W, the left and right bending jigs 6, 66 are clamped by the left and right clamp devices 12, 72, and these are rotationally driven in synchronization by the left and right drive devices 16, 76. The W can be collectively processed with high accuracy, and the processing efficiency can be improved. Further, since the moving device moves one of the left and right bending devices 1 and 2 to the bending position according to the bending direction, it is possible to continuously perform the left and right bending work, and it is possible to improve work efficiency. Further, at the same time as the above rotation, the table device 5 is rotated in the same direction as the processing direction to prevent the pipe W from being scratched due to the slip between the pipe W and the table device 5.

Since the left bending device 1 and the right bending device 2 are provided according to the left and right bending processes, the left or right bending devices 1 and 2 can adjust the working accuracy.

Although the embodiments of the present invention have been described above, the present invention is not limited to such embodiments, and it goes without saying that the present invention can be implemented in various modes without departing from the scope of the present invention.

As described in detail above, according to the multi-headed bending apparatus of the present invention, a plurality of workpieces are held by a bending die and a clamping die,
The tip of the bending die and the clamping die are clamped by the clamp part, and the bending jig and the clamp part are rotated in synchronization with the driving means to prevent bending of the bending jig during bending and to perform accurate bending. It has an excellent effect that it can be processed. Furthermore, the effect that the bending means can be continuously moved by moving the bending means according to the bending direction by the moving means is also obtained.

[Brief description of drawings]

FIG. 1 is a front view of a multi-head bending device as an embodiment of the present invention, FIG. 2 is a top view of the multi-head bending device, FIG. 3 is a left side view of the multi-head bending device, and FIG. It is explanatory drawing which processes into a wrinkle. W: Pipe, 1 ... Left bending device 2 ... Right bending device, 4 ... Moving device 6 ... Left bending jig, 12 ... Left clamping device 16 ... Left driving device, 66 ... Right bending device Tool 72 …… Right clamp device, 76 …… Right drive device

Claims (1)

[Claims] 1. A multi-headed bending apparatus comprising two or more bending means for bending a workpiece, wherein the bending means includes a bending die for holding a plurality of workpieces, and a clamping die. A bending jig that is dynamically driven to rotate the fastening die around the bending die to perform bending, and clamp the tip of the bending die and the fastening die of the bending jig to center the rotation center of the bending jig. And a drive means for rotationally driving the bending jig and the clamp portion so that they can be synchronously rotated in the same direction, and the above-mentioned two or more bending means. A multi-headed bending device having a moving means for selecting the item according to the bending process and moving it relative to the bending position of the workpiece.