JPH10146619A - Device for bending tube - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tube bending device with which desired bending work is executable by a simple operation without deforming a tube to be worked and breaking the surface to be worked. SOLUTION: In the tube bending device which has a chuck 2 for clamping the tube 1 to be bent, a bending die 6 for guiding the bending of the tube 1 and turning it, a clamp 8 with which the tube 1 is pressed against the bending die 6 and which is turned together with the bending die 6, a pressure die 7 for holding the tube 1 by pressing it against the bending die 6, a delivery device 5 for straightly moving the tube 1 in the axial direction, a twisting motor 3 for turning the tube 1 around the axial center and a controller 10 for controlling the operations of the clamp 8, the pressure die 7, the delivery device 5 and the twisting motor 3. The bending work is successively executed in plural positions along the axial center of the tube 1 at the time of moving the tube 1 after bending, the controller 10 has functions for delivering the tube 1 and turning the bending die 6 without interference between the tube 1 and the bending die 6 based on the data of bending angles which are inputted.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tube bending apparatus for bending a tube.

[0002]

2. Description of the Related Art A pipe bender apparatus for bending a plurality of portions in a longitudinal direction of a tube is disclosed in, for example, Japanese Patent Publication No. 4-96.
No. 05 gazette. In this type of conventional pipe bender device, a tube is bent by gripping a tube to be processed with a chuck, pressing the tube against a bending die with a pressure die, and rotating the clamp together with the bending die. Is done. And in order to perform the next bending process,
Release the pressing of the pressure mold and the clamp, move the tube in the axial direction if necessary, and further rotate the bending mold. Is applied to the tube.

[0003] In this case, the operator inputs data of the amount of movement of the tube in the axial direction to the processing position, data of the twist angle of the tube at the processing position, and data of the bending angle of the tube at the processing position. The control device moves the tube in the direction of the axis of the tube to the position to be processed, sets the bending direction by turning around the axis of the tube, bends, bends with a pressure die and a clamp, and bends after bending. , Pressure mold and release of the clamp are controlled.

[0004]

In the above-mentioned conventional pipe bender device, the operator inputs the bending angle data, the movement data in the axial direction of the tube and the rotation angle data about the axial center to the control device. Must be entered for each. For this reason, it is necessary to select and input data set in advance according to the shape of the bending die and the shape and material of the pipe every time the bending process is performed, and the selection of this data is considerably complicated. If the data at the time of releasing the bending of the tube input by the operator is not appropriate, the tube may be deformed or the surface processing may be damaged.

The present invention has been made in view of the current state of operation of a pipe bender device as described above, and its object is to provide a simple operation without causing deformation or damage to a machined surface of a tube to be machined. An object of the present invention is to provide a tube bending apparatus capable of performing a desired bending process on various kinds of tubes to be processed.

[0006]

SUMMARY OF THE INVENTION In order to solve the above-mentioned object, the present invention provides a chuck for gripping a tube to be bent, a bending die for rotating the tube by guiding the bending of the tube, and A clamp that presses against the bending die and rotates together with the bending die; a pressure die that presses and holds the tube on the bending die; a feeding unit that linearly moves the tube in the axial direction; Rotating means for rotating about the center, the clamp, the pressure type,
A control device for controlling the operation of the sending means and the rotating means, and a tube bending device that sequentially performs bending processing on a plurality of positions along the axis of the tube, wherein the control device includes: When moving the tube after the bending process, based on the input bending angle data, so that the tube and the bending mold do not interfere, sending out the tube by the sending means,
Further, it has a function of rotating the bending die.

According to such a configuration according to the present invention,
The clamp to be bent is gripped by the chuck, and the clamp and pressure type are controlled by the controller that inputs the data of the bending angle, the pressure type presses the tube against the bending type, and the bending type guides the tube bending. The tube is bent by pressing the tube against the bending die and rotating together with the bending die. Next, when the tube thus bent is moved to the next processing position, the control device sends out the feeding means based on the input bending angle data so that the tube and the bending mold do not interfere with each other. By rotating the tube in the direction of sending out the tube and returning the bending mold, the interference between the rotating mold and the tube is released.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. Here, FIG. 1 is an explanatory diagram showing the configuration of one embodiment, FIGS. 2 to 9 are explanatory diagrams showing the operation of this embodiment, FIG. 10 is an explanatory diagram of the shape of the bending die and the feeding operation of one embodiment, FIG. 11 is a flowchart showing the operation of one embodiment.

In FIG. 1, reference numeral 1 denotes a tube to be bent. One end of the tube 1 is gripped by a chuck 2, and the chuck 2 has a twist that rotates the chuck 2 about an axis. A motor 3 is attached, and a feeding device 5 for moving the chuck 2 holding the tube 1 in the axial direction is attached to the chuck 2.

On the other end of the tube 1, a bending die 6 for guiding bending at the time of bending is provided with a groove 6a.
And a pressing block 21 having a groove continuous with the groove 6a at an end of the groove 6a and having a pressing flat surface 21a formed on a surface thereof. Inlaid. A clamp 8 which presses the tube 1 against the bending die 6 at the time of bending and moves along the bending die 6 is disposed on the bending die 6 so as to face the bending die 6 therebetween. , A pressure mold 7 for pressing the tube 1 against the bending mold 6 is provided.

On the other hand, a control device 10 for controlling the entire operation of this embodiment is provided. The control device 10 receives a control program of the control device 10 and data for control operation via a bus #. RAM 1 in which stored R # 11 and data for control operation are written and read
2, a feeding device 5, a torsion motor 3, a pressure type driver 15 for driving the pressure die 7, a clamp driver 14 for driving the clamp 8, and a bending type driver 13 for driving the bending die 6 are connected.

As shown in FIG. 10, the bending die according to the present invention has a pressing block in which a semicircular disk having a radius R is formed such that a diameter portion of the disk is integrally extended with a length l. 21 is additionally formed, a groove having a depth of d is formed on the peripheral surface, and the bending die 6 is rotatable around a rotation shaft 20 provided at the center of the disk portion.

Next, the operation of one embodiment of the present invention will be described. In this embodiment, when bending the tube,
The amount of movement of the tube to the processing position as processing data,
Control device 1 for tube bending angle and tube torsion angle
Enter 0. Then, the control device 10 responds to the input machining data by using the bending die 6, the pressure die 7, the clamp 8,
By controlling the feeding device 5 and the torsion motor 3, the tube 1
Is moved to the processing position, the tube 1 is twisted in the bending direction, the tube 1 is bent, and the tube 1 is disengaged from the bending mold 6, the pressure mold 7 and the clamp 8 in the processing engagement state. Is moved to the next processing position. In this case, in this embodiment, the release of the processing engagement state is performed based on the input bending angle data, and the control device damages the shape of the tube 1 or damages the tube 1 based on the bending angle data. This processing engagement state is automatically released without damaging the surface treatment portion.

First, the operation of the embodiment at a normal bending angle where the bending angle of the tube does not exceed a predetermined value will be described with reference to the flowchart of FIG. In step S1, the clamp driver 1 operated by a command from the control device 10
4. The clamp 8 is moved to a position where the tube 1 is pressed against the bending die 6 by the pressure die driver 15, and the pressure die 7 presses and holds the tube 1. In this state, the process proceeds to step S2, in which the bending type driver 15 operated by the command of the
As a result, the bending die 6 is rotated by the rotating shaft 20, and the clamp 8 presses the tube 1 against the bending die 6, and the rotating shaft 2
By rotating around 0, the tube 1 is bent. Next, the process proceeds to step S3, where the processing engagement state is released, and the engagement of the clamp 8, the bending die 6, and the pressure die 7 with the tube 1 is released.
Proceeding to 4, the control device 10 confirms that the bending angle data of the tube is equal to or less than a predetermined value. Sent in the core direction.

Then, proceeding to step S5, the tube 1 is sent in the axial direction to the next bending position by the feeding device 5 operated according to the command of the control device 10, and the command of the control device 10 is issued at the bending position. Is turned to the next bending direction position. Further, a bending type driver 1 operated by a command of the control device 10
3. The bending die 6, the clamp 8 and the pressure die 7 are set at the processing preparation position by the clamp driver 14 and the pressure type driver 15, and the process returns to step S1 to start bending again.

Next, referring to FIG.
The operation in the case where the bending angle exceeds a predetermined value will be described. First, at step S10, as shown in FIG. 2, the feeding device 5 sends out the chuck 2 holding one end of the tube 1 in the axial direction of the tube 1 according to a command from the control device 10, thereby processing the tube 1. The position is arranged opposite to the bending die 6, and the pressure die driver 15 is operated by a command from the control device 10, and the pressure die 7 presses and holds the tube 1 on the bending die 6. Next, as shown in FIG.
Is operated, and the clamp 8 presses the tube 1 against the bending mold 6. In this state, the process proceeds to step S11, in which the bending driver 13 is operated, and the bending die 6 is rotated by the rotation of the rotary shaft 20, and at the same time, the clamp 8 starts to rotate about the rotary shaft 20, and the feeding device 5 feeds the tube 1 in the axial direction.

Thus, the tube 1 sandwiched between the bending die 6 and the clamp 8 is rotated by the rotating shaft 20 while being sent out by the feeding device.
When the bending is completed by the clamp 8 which rotates around the rotation shaft 20 and the bending is completed at the position shown in FIG. 4, the clamp driver 14 is operated in accordance with a command from the control device 10 in step S12, and the operation shown in FIG. The pressing of the tube 1 by the clamp 8 is released as described above.
Moves out of the bending plane, and the pressed state of the pressure mold 7 is released. Then, proceeding to step S13, as shown in FIG. 6, the delivery device 5 is operated by a command from the control device 10, and the tube 1 is delivered by a predetermined distance L1. At that position, as shown in FIG. 7, in step S14, the bending die 6 is moved in the counterclockwise direction (the direction opposite to the rotating direction for bending) by the operation of the bending die driver 13 in accordance with a command from the control device 10. Turn 90 ° and return, tube 1
Is released from the bending position.

Next, the process proceeds to step S15, where the tube 1 is twisted by the twist motor 3 operated by a command from the control device 10 to a position where the tube 1 can be fed.
Then, proceeding to step S16, the tube 1 is fed in the axial direction to the next bending position by the feeding device 5 operated according to the command of the control device 10, and is operated at the bending position by the command of the control device 10. The torsion motor 3 rotates to the next bending direction position without interfering with the bending die 6. Further, the bending die 6, the clamp 8 and the pressure die 7 are set at the processing preparation position by the bending die driver 13, the clamp driver 14 and the pressure die driver 15 which are operated by the command of the control device 10, and the process returns to the step S1 and again. Bending is started.

Here, in FIG. 10, the point at the end of the groove 6a of the semicircular portion of the bending die 6 is P0, and the point P at the end of the groove 6a of the bending die 6 is a point P1 by the rotation of the bending die 6. When the amount of lifting of the bending die 6 is set to k at the time of moving to, the following Expression 1 is established.

[0020]

[Formula 1] k = [l ² + (R−d) ² ] ^1/2 − (R−d)

Therefore, if the lift amount k of the tube 1 at the time of rotation of the bending die 6 is made smaller than the springback amount B of the tube 1 at the position P0 in FIGS. 1 smoothly rotates without deforming the tube 1 or damaging the surface processing of the tube 1. In order to avoid waste of movement of the tube 1 in the apparatus of this embodiment, it is preferable to satisfy Β = k. In this case, the springback amount Β differs depending on the material and dimensions of the tube 1, the bending curvature and the coordinate position on the tube 1, and the floating amount k when the bending die 6 is released differs depending on the shape of the bending die 6.

In the above embodiment, data of the material, dimensions, bending curvature and springback amount B corresponding to the coordinate position on the tube 1 and the shape data of the bending mold 6 are stored in the ROM 11 in advance. When the bending is completed in FIG. 5, the control device 10 reads out the shape data 1, R, and d of the bending die 6 from R # 11, and calculates the lift amount k by the above equation 1 based on these data. . Next, the control device 10 sequentially reads the springback amount B on the x-coordinate with the origin at the bending center P3 shown in FIG. 6 corresponding to the material, dimensions, and bending curvature of the tube 1 from R # 11, and satisfies B> k. Search for the coordinate position to be used. Then, the minimum sending distance L1 is calculated so that the obtained coordinate position becomes the x coordinate of the point P0, and the chuck 2 holding the tube 1 by the predetermined distance L1 is sent out in the x-axis direction.

As described above, the chuck 2 is moved by the predetermined distance L1.
After moving the tube 1 gripped by the control device 10
The bending die driver 13 is operated by the instruction of
Is rotated counterclockwise about the rotation shaft 20, and in step S14, as shown in FIG.
Is disengaged from the first bending position. During this rotation, the lifting amount k of the bending die 6 is smaller than the springback amount of the tube 1 at that position, so that the bending die 6 rotates smoothly without damaging the tube 1.

Next, in step S15, as shown in FIG. 8, the torsion motor 3 is rotated by a command from the control device 10, and the tube 1 is rotated to the next bending plane different from the first bending plane. As shown in (1), the bending die driver 13 is operated by a command from the control device 10, the bending die 6 is turned 90 ° counterclockwise, and the bending die 6 is set at the next bending position. The bending position of the tube 1 is subjected to bending as described above, and thereafter, the bending die 6 is set to a new bending position and the bending operation is sequentially performed.

As described above, according to the present invention, the control device 1
0 is the tube 1 based on the tube bending angle data.
Mold 6 and pressure mold 7 for tube 1 after bending
In addition, the operation of releasing the engagement of the clamp 8 can be performed automatically and efficiently without causing deformation or damage to the surface processed surface of the tube 1 and without imposing a burden on the operator for inputting data for the release operation. Can be executed.

[0026]

As described above, according to the present invention, when the bent tube is moved to the next bending position, the tube is bent based on the bending angle data input to the controller. Control is performed by the control device so that the tube is sent out by the sending means and the bending mold is turned by the turning means so as not to interfere with the mold, so that input of movement data by the operator is unnecessary. According to the characteristics of the tube, the bending conditions, and the shape of the bending mold, it is possible to provide a tube bending apparatus that efficiently performs bending without causing deformation or damage to the surface to be processed of the tube. .

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing a configuration of an embodiment of the present invention.

FIG. 2 is an explanatory diagram showing a first operation of one embodiment of the present invention.

FIG. 3 is an explanatory diagram showing a second operation.

FIG. 4 is an explanatory diagram showing a third operation.

FIG. 5 is an explanatory diagram showing a fourth operation.

FIG. 6 is an explanatory diagram showing a fifth operation.

FIG. 7 is an explanatory diagram showing a sixth operation.

FIG. 8 is an explanatory diagram showing a seventh operation.

FIG. 9 is an explanatory diagram showing an eighth operation.

FIG. 10 is an explanatory view of the configuration and operation of a bending die according to one embodiment of the present invention.

FIG. 11 is a flowchart showing the operation of one embodiment of the present invention.

[Description of Signs] 1 Tube 2 Chuck 3 Torsion motor 5 Feeding device 6 Bending die 6a Groove 7 Pressure die 8 Clamp 10 Control device 11 R１２12 RΑΜ12 13 Bending driver 14 Clamp driver 15 Pressure driver

Claims (2)

[Claims] A chuck for gripping a tube to be bent, a bending die for rotating the tube by guiding the bending of the tube, and a clamp for pressing the tube against the bending die and rotating together with the bending die. A pressure type for pressing and holding the tube on the bending die, a feeding unit for linearly moving the tube in the axial direction, a rotating unit for rotating the tube about the axis, the clamp, and the pressure. Type,
A control device for controlling the operation of the sending means and the rotating means, and a tube bending device that sequentially performs bending processing on a plurality of positions along the axis of the tube, wherein the control device includes: When moving the tube after the bending, based on the input bending angle data, so as not to interfere with the tube and the bending mold, sending out the tube by the sending means,
A tube bending device having a function of rotating the bending die. 2. The delivery by the delivery means when rotating the tube after the bending process is performed by also referring to data on the tube input to the control device. The tube bending apparatus according to claim 1.