JPH0811253B2 - Bending device - Google Patents

Description

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

[Prior Art] Conventionally, in bending, a work piece is sandwiched between a bending die and a fastening die, a pressure die that receives a bending reaction force is brought into contact with the work piece, and the work piece is bent by the fastening die. It was wrapped around.

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

Therefore, the present invention has been made to solve the above problems, and an object thereof is to provide a 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, as illustrated in FIG. 1, a main bending means M1 for simultaneously clamping a plurality of workpieces W by bending jigs and rotating the bending jigs to bend the workpieces W; The main bending rotation detecting means M2 for detecting the number of rotations of the bending means M1, the auxiliary bending means M3 for rotating the clamp portion for clamping the tip of the bending jig of the main bending means M1, and the main bending rotation detecting means M2. This is the configuration of the bending apparatus including a bending control unit M4 that controls the rotation of the auxiliary bending unit M3 based on the signal and rotates the auxiliary bending unit M3 in synchronization with the rotation of the main bending unit M1.

[Operation] The bending device of the present invention having the above-mentioned configuration is provided with the main bending means M1.
The plurality of workpieces W are simultaneously clamped and rotated by the bending jig, and the tip of the bending jig of the main bending means M1 is clamped by the clamp portion of the auxiliary bending means M3. Then, the number of revolutions of the main bending means M1 is detected by the main bending rotation detecting means M2, and the auxiliary bending means M3 is changed to the main bending means by the bending control means M4.
Control to rotate in synchronization with M1.

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

FIG. 2 is a front view of a bending apparatus which is an embodiment of the present invention,
FIG. 3 is a side view of the bending device. This bending device is two main bending devices selected according to the bending direction of three pipes W of a condenser (condenser) in an air conditioner such as an automobile, which is a workpiece, that is, a right main that performs a right bending process. A bending device 1 and a left main bending device 2 for performing left bending, a right main bending encoder 4 for detecting rotation of the right main bending device 1,
Left main bending encoder for detecting rotation of left main bending device 2
6. The auxiliary bending device 8 is engaged with the right or left main bending device 1, 2 to rotate, and the table device 10 is rotated with the pipe W according to the bending direction during bending. In addition, in order to selectively supply the right or left main bending device 1 or 2 to the processing position according to the bending direction, the bending device includes a right elevating device 12 for raising and lowering the right main bending device 1, and a left raising device. A left lifting device 14 that raises and lowers the main bending device 2 and a moving device 16 that moves the right and left main bending devices 1 and 2 together with the right and left lifting devices 12 and 14 from side to side are also provided.

Here, the right main bending apparatus 1 rotates and drives the right bending jig 18 and the right bending jig 18 that sandwich the pipe W by a hydraulic device (not shown) and right-bend it to a predetermined bending radius via a timing belt 20. It is composed of an AC servo motor 22 and the like. The right main bending encoder 4 is mounted on the base 23 of the right main bending device 1, and is configured to transmit the rotation of the right bending jig 18 via the dimming belt 24. Therefore, the right main bending encoder 4 sequentially detects the rotation of the right bending jig 18.

The left main bending device 2 includes a left bending jig 26 that holds the pipe W and bends it to a predetermined bending radius, and an AC servomotor 30 that rotationally drives the left bending jig 26 via a timing belt 28.
And so on. The left main bending encoder 6 is mounted on the base 31 of the left main bending device 2, and is configured to transmit the rotation of the left bending jig 26 via the timing belt 32. Therefore, the left main bending encoder 6 sequentially detects the rotation of the left bending jig 26. still,
This left main bending encoder 6 is the right main bending encoder 4
Together with this, it functions as the main bending rotation detecting means.

The right and left main bending devices 1 and 2 are moved to the processing position by the right and left lifting devices 12 and 14 and the moving device 16 according to the bending direction. The right and left lifting devices 12 and 14 support the bases 23 and 31 of the right and left main bending devices 1 and 2 slidably in the vertical direction by rails provided on the moving base 33, respectively, and It is configured to be driven vertically by a cylinder. Further, the moving device 16 includes a moving base 33.
Is slidably supported in the left-right direction by a rail provided in the main body 55, and is driven in the left-right direction by a hydraulic cylinder. Right and left lifting device 12,1 with the above configuration
The right and left main bending devices 1 and 2 having different pivot centers are exchanged according to the bending direction by the 4 and the moving device 16.

The auxiliary bending device 8 that rotates by engaging with the right and left main bending devices 1 and 2 is a right bending jig selected according to the bending direction.
18 or a clamp portion 34 that clamps the tip of the left bending jig 26, a bearing portion 36 that rotatably supports the clamp portion 34, and that moves the rotation center according to the bending direction, a timing belt 38, and a bearing portion 36. The clamp part 34 is rotationally driven via
An AC servomotor 40, an auxiliary bending encoder 44 that transmits the rotation of the clamp portion 34 via the bearing portion 36 and the timing belt 42, and the like. Here, the clamp part 34
Is driven by a hydraulic device (not shown) and holds the tip of the right bending jig 18 or the left bending jig 26. Further, the bearing portion 36 transmits the rotation of the AC servomotor 40 to the rotation shaft to which the clamp portion 34 is attached via the Oldham coupling 45, and the rotation shaft can be moved in the left-right direction by a hydraulic device (not shown). It has become a structure.

In addition, the table device 10 that rotates during bending processing has a table body 46 on which a pipe W is placed and which is rotatably supported.
A gear 46a provided on the outer circumference of the table body 46, an AC servo motor 50 for rotating a pinion 48 meshing with the gear 46a, and a table encoder 54 for transmitting the rotation of the AC servo motor 50 via a timing belt 52. ing.

Next, the electric system of this embodiment will be described with reference to the block diagram shown in FIG. Each of the above devices is driven and controlled by the electronic control circuit 100 to process the pipe W. The electronic control circuit 100, as shown in FIG.
The M102, RAM103, and backup RAM104 are configured as the center of the logical operation circuit, and an input / output circuit for performing input and output with the outside, here, a keyboard input circuit 105, a pulse input circuit 107, a motor drive output circuit 108, a drive output circuit 109 Common bus 110
It is configured to be connected to each other via.

The CPU 101 inputs a program or the like in the operation sequence set by the keyboard 106 via the keyboard input circuit 105, and inputs pulse signals from the encoders 4, 6, 44, 54 via the pulse input circuit 107, respectively. .

On the other hand, these programs and signals and ROM102, RAM103
Based on the data in the CPU 101, the CPU 101 outputs the motor drive output circuit 108.
A drive signal is output to each of the motors 22, 30, 40, 50 via the drive output circuit 109, and a signal for driving each device 12, 14, 16, 34, 36 is output via the drive output circuit 109 to output the right and left main bending. Device 1, 2, auxiliary bending device
8, Each device such as the table device 10 is controlled.

Next, the processing performed in the control circuit 100 described above will be described with reference to the flowchart of FIG.

When this bending device is turned on, first the terminal 106
The operation for setting the processing conditions such as the bending direction and bending angle of the pipe W is performed.

When the operation is started, the pipe W is fed to the bending device by a predetermined amount by a feeding device (not shown). When the pipe W is fed, right bending work or left bending work is performed according to a preset working sequence. First, if right bending is performed first according to the processing sequence, the right bending control routine shown in FIG. 4 is repeatedly executed together with other control routines. In step 200, the process of moving the right bending jig 18 to the position of the pipe W is performed. This is performed by moving the right main bending device 1 to the lower part of the pipe W by the moving device 16 and then raising the right main bending device 1 by the right elevating device 12. Next, at step 210, a process of sandwiching the pipe W by the right bending jig 18 is performed. This is performed by the bending die and the closing die of the right bending jig 18. In the following step 220, a process of clamping the right bending jig 18 is performed. This is done by clamping the tips of the bending die and the clamping die by the clamp portion 34 of the auxiliary bending device 8.
Prior to this clamping, the bearing 36 also switches the center of rotation of the clamp 34 to the center of rotation during the right bending process (state shown in FIGS. 2 and 3).

When the preparation for the right bending is completed by the processing of the above steps 200 to 220, the right bending is started in the following step 230. This is because the AC servomotor 22 of the right main bending device 1 is driven via the motor drive output circuit 108 and the right bending jig 18
Is rotated to the right, the AC servo motor 40 of the auxiliary bending device 8 is driven to rotate the clamp portion 34 to the right, and the AC servo motor 50 of the table device 10 is also driven to rotate the table body 46 to the right. . Next, in step 240, a process of detecting the number of rotations of the right bending jig 18, the clamp portion 34, and the table body 46 is performed. This detection is performed by reading the signals from the right main bending encoder 4, the auxiliary bending encoder 44, and the table encoder 54 through the pulse input circuit 107, respectively.

In the following step 250, it is determined whether or not the numbers of rotations of the right bending jig 18 and the clamp portion 34 are the same. This determination is made based on whether or not the rotational speeds read from the right main bending encoder 4 and the auxiliary bending encoder 44 in step 240 are the same. If it is determined that they are the same, the process proceeds to step 260. Further, when it is determined that the rotation speed of the clamp portion 34 is lower than the rotation speed of the right bending jig 18, the process proceeds to step 270, and at step 270, the AC servomotor 40
A process of increasing the rotation speed of the clamp unit 34 and increasing the rotation speed of the clamp unit 34 is performed. Further, when it is determined that the rotation speed of the clamp portion 34 is higher than the rotation speed of the right bending jig 18, the process proceeds to step 280, in which the rotation speed of the AC servomotor 40 is reduced and the rotation speed of the clamp portion 34 is decreased. Processing is performed. By the processing of these steps 250, 270, 280, the right bending jig 18 and the clamp portion 34 are synchronously rotated. When the processes of steps 270 and 280 are completed, the process proceeds to step 260.

In the following step 260, the right bending jig 18 and the table body 46 are
It is determined whether the rotation speeds of and are the same. This determination is made based on whether or not the rotational speeds read from the right main bending encoder 4 and the table encoder 54 in step 240 are the same. If it is determined that they are the same, the process proceeds to step 290. If it is determined that the rotation speed of the table body 46 is lower than the rotation speed of the right bending jig 18, the process proceeds to step 300. At step 300, the AC servomotor 50
The process of increasing the rotation speed of the table main body 46 is performed. Further, if it is determined that the rotation speed of the table body 46 is higher than the rotation speed of the right bending jig 18, step 31
Proceeding to 0, in step 310, processing for reducing the rotation speed of the AC servo motor 50 and reducing the rotation speed of the table main body 46 is performed. By the processing of these steps 260, 300, 310, the right bending jig 18 and the table main body 46 are synchronously rotated.
When the processes of steps 300 and 310 are completed, the process proceeds to step 290.

Next, at step 290, it is determined whether or not a predetermined bending angle has been reached. This decision is a step
At 240, it is determined whether or not the rotation angle obtained based on the pulse signal read from the right main bending encoder 4 has reached a predetermined bending angle. If it is determined that the bending angle is reached, the process proceeds to step 320. If it is determined that the bending angle has not been reached, the processing of steps 240 to 310 described above is repeated.

In the following step 320, processing for stopping the right bending process is performed. This is the AC servomotor 2 of the right main bending device 1.
2, AC servo motor 40 of auxiliary bending device 8, table device 10
This is done by stopping the rotation of each of the AC servo motors 50 of. In step 330, the process of opening the right bending jig 18 is performed. This is the reverse of the process performed in step 220, and the process of releasing the clamps at the tips of the bending die and the clamping die by the clamp portion 34 of the auxiliary bending device 8 is performed. Next, in step 340, a process reverse to the process performed in step 210 is performed, and a process of releasing the holding of the pipe W by the right bending jig 18 is performed. In the following step 350, the process reverse to the process performed in step 200 is performed, the process of lowering the right main bending device 1 by the right elevating device 12 is performed, and then the process goes to “NEXT” to once exit this control routine. finish.

The left bending process is performed in the same manner as the right bending process described above, and the left and right bending processes are alternately performed so that the pipe W is folded.

The bending apparatus of the present embodiment configured as described above is rotated by sandwiching the three pipes W by the right or left bending jigs 18, 26 of the right or left main bending apparatus 1, 2 depending on the bending direction. In addition, the rotation of the right or left bending jig 18, 26 is detected by the right or left main bending encoders 4, 6, and the auxiliary bending device 8 and the table device 10 are controlled by the control circuit 100 to the right or left bending jig 18, 6. Control to rotate in synchronization with 26.

In this way, according to the present bending apparatus, three vertically arranged pipes W are bent to the left and right in accordance with a predetermined processing order. When the three pipes W are bent, the right bending jig 18 or the left bending is performed. It is clamped by jig 26 and right-bending jig 18
Alternatively, the left bending jig 26 may be attached to the clamp portion 34 of the auxiliary bending device 8.
Bending is performed by clamping and rotating in synchronization with each other to reduce bending of the right and left bending jigs 18 and 26 and perform accurate processing. In addition, by the table device 10, by rotating the table body 46 during processing, it is possible to perform excellent processing without damaging the pipe W.

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.

EFFECTS OF THE INVENTION As described in detail above, according to the bending apparatus of the present invention, the bending jig of the main bending means simultaneously clamps and rotates a plurality of workpieces, and the clamp portion of the auxiliary bending means causes the main bending means to rotate. Clamp the tip of the bending jig. Then, the number of rotations of the main bending means is detected by the main bending rotation detecting means,
The bending control means controls the auxiliary bending means to rotate in synchronization with the main bending means. As a result, it is possible to prevent the bending jig of the main bending means from being deformed or twisted by sandwiching a plurality of workpieces at the time of processing, and it is possible to perform accurate processing. In addition, since a plurality of workpieces can be bent at the same time with high processing accuracy, the processing efficiency can be improved.

[Brief description of drawings]

FIG. 1 is a block diagram illustrating the basic configuration of the present invention, FIG. 2 is a front view of a bending apparatus that is an embodiment of the present invention, and FIG.
FIG. 4 is a side view of the bending apparatus, FIG. 4 is a block diagram showing a configuration of an electric system of the embodiment, and FIG. 5 is a flow chart showing an example of a control routine executed in a control circuit of the embodiment. W …… Pipe 1 …… Right main bending device 2 …… Left main bending device 4 …… Right main bending encoder 6 …… Left main bending encoder 8 …… Auxiliary bending device 100 …… Electronic control circuit

Claims (1)

[Claims] 1. A main bending means for simultaneously clamping a plurality of workpieces by a bending jig to rotate the bending jigs to bend the workpiece, and a main bending means for detecting the number of rotations of the main bending means. Bending rotation detecting means, auxiliary bending means for rotating the clamp part for clamping the tip of the bending jig of the main bending means, and rotation of the auxiliary bending means based on the signal of the main bending rotation detecting means for controlling the main bending And a bending control means for rotating the auxiliary bending means in synchronization with the rotation of the means.