JPS62267020A - Bending device - Google Patents

Abstract

PURPOSE:To control the bending position and direction of a work and to bend the work of small diameter well by driving the sliding member and the rotary member provided on the moving base moving in parallel to the work by a control means with the work being held on a fixed base. CONSTITUTION:A mobile base M5 is moved in the arrow mark A direction along the rail provided so as to become in parallel to a work W by driving and controlling a sliding member M6 with a driving control means M8, and the bending position of a bending head M2 is decided. The rotary member M7 provided on the fitting part of the bending head M2 rotates the bending head M2 with the work W as the center, deciding the work bending direction by driving and controlling the rotary member M7 with the driving control means M8. Consequently the bending of the work W is performed in the state of its being fixed as it is without rotating it and the productivity is improved.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a bending device that automatically bends rod-shaped or cylindrical workpieces such as wire rods or pipes and shapes them into desired shapes.

[Prior Art] Conventionally, this type of bending device has a bending device that grips one end of a workpiece and rotates it around its axis, as described in, for example, Japanese Patent No. 159225/1983. A device with a movable table having vines and a bending head that bends the workpiece at a predetermined angle at the narrow end (I:a) is used.

That is, as shown in FIG.
Rotate the chuck 72 to determine the bending direction of the workpiece, and move the moving table 74 to which the chuck 72 is attached to the workpiece 7.
1 to determine the bending position of the workpiece 71,
The workpiece 71 is sequentially bent by the bending head 75.
Such bending devices are known.

[Problems to be Solved by the Invention] However, with this type of device, the workpiece 71 is rotated around its axis to determine the bending direction, so it is not possible to process small-diameter workpieces with poor rigidity. There was a problem. In other words, for small-diameter workpieces with poor rigidity, when the bending process progresses and the workpiece protrudes significantly from the bending head, if you use a tip to rotate the workpiece to change its bending direction, centrifugation due to its own weight will occur. The workpiece is deformed by the force, making it impossible to shape the workpiece into the desired shape.

Therefore, conventionally, when bending such a small-diameter workpiece with poor rigidity, a bending jig 78 having a bending die 77 disposed at a predetermined position is used, for example, as shown in FIG. , the bending process was done manually. Therefore, there were problems such as poor workability and low productivity.

The present invention is aimed at providing a bending device capable of bending even small-diameter workpieces with poor rigidity as described above, and improving the productivity thereof. Therefore, we adopted the following configuration.

[Means for Solving the Problems] That is, the configuration of the present invention as a means for solving the above problems is, for example, as shown in FIG. A bending device that is equipped with a bending head M2 that bends and bends, and that bends the workpiece W into a desired shape, comprising: a fixing table M3 that grips the workpiece W and fixes it in a predetermined position; and the fixing table. A rail M4 is installed to be parallel to the workpiece W fixed to M3, and the bending head M2 is fixed to the fixing base by the fixed rail M4. A movable table M5 fixed at the height position of the workpiece W, the movable table M5 moved along the rail M4 to determine the bending position of the workpiece W! A learning member M6, and the movable table M5 The bending head is attached to a part (J), and the bending head M2 is rotated on a plane orthogonal to the workpiece W around the workpiece W to determine the bending direction of the workpiece W. M7, the sliding member M6, and the rotating member M7 are drive-controlled according to a preset procedure;
[Bending of the Workpiece] A drive control means M8 for controlling the position and bending direction;

In FIG. 1, (a) shows the structure of the entire bending apparatus, and (b) shows a side view of the movable table M5.

[Function] In the bending force zero bending device of the present invention configured as described above, the drive control means M8 drives and controls the rotating member M6, so that the movable table M5 moves in the direction shown by the arrow in FIG. is moved, and the position of the bending head M2 relative to the workpiece W, that is, the bending position is determined. Further, the drive control means M8 drives and controls the rotating member M7, so that the bending head M2 is rotated around the workpiece W as shown by arrow B in FIG. 1, and the bending direction of the workpiece W by the bending head M2 is determined. be done.

The bending process of the hammered workpiece W is performed while the workpiece W remains fixed as shown in the rotation of -Φ by 8 degrees.

[Example] An embodiment of the present invention will be described below with reference to the drawings.

First of all, Fig. 2 shows the bending/Jul engineering body of this example.
It is a perspective view of the sword showing the hem.

As shown in the figure, the bending apparatus of this embodiment includes a fixing table 2 for holding a workpiece 1 horizontally at a predetermined height;
A rail 3 is installed parallel to the workpiece 1 held on the fixed platform 2, a movable platform 4 is attached to the soil of the rail 3, and a movable platform 1 can be moved anywhere on the rail 3. In order to position the knife at the position, it consists of a positioning rack 5 with 32 racks parallel to the row 3, a base plate 6 to which the fixing base 2, the rail 3 and the rack 5 for positioning are fixed. It is configured.

As shown in FIG. 3, the fixing table 2 is composed of a support 11 for holding the work 1 at a predetermined height, and a clamp 12 for gripping the work 1. Further, the clamp 12 is composed of a fixed clamper 12a, a movable clamper 12b, and a hydraulic cylinder 12c. By moving the movable clamper 12b in the direction of arrow C by the hydraulic cylinder 12C, there is a gap between the fixed clamper 12a and the movable clamper 12b. Workpiece 1 can be gripped.

Next, fitting projections 3a are formed on both sides of the rail 3 in the longitudinal direction in order to fix the moving table 4 rotatably along the workpiece 1. Fitting recess 4aIF formed in 4! : By mating, the moving platform 4 is created!
8. It can be fixed freely.

On the other hand, the movable table 4 is equipped with a small gear 15 that meshes with the positioning rack 5 and a positioning gear 17 that rotates the small gear 15. By rotating, the movable table 4 can be rotated on the strip 3 in the direction of the arrow shown in the figure, and can be fixed at any position.

The positioning motor 17 includes a DC servo motor and a position sensor (14) that outputs a pulse signal according to the rotation of the DC servo motor.
and move+J+position of table 4 relative to workpiece 1 (I
The movable platform 4 can be moved on the rails 3 while being recognized.

Further, a bending head 20 is installed on the movable table 4 via a support 19 at a height position where the workpiece 1 held on the fixed table 11 can be bent, that is, at the same height as the workpiece 1. This bending head 20 [31] is used to bend the workpiece 1 to a desired angle. A bending die 23 for bending with a radius of curvature, a pressure die 24 rotatably attached to the base 21 and pressing and fixing the workpiece 1 to the bending die 23, and a bending shaft 22 attached to the base 21. A bending arm 25 is rotatably attached around the bending arm 25, a clamping die 26 is slidably attached to the bending arm 25 and presses the workpiece 1 against the bending die 22, and a pressing die 24 and a clamping die 26 are attached. It consists of hydraulic cylinders 27 and 28 that open and move, respectively, and a bending motor 29 that rotates the bending arm 25,
By pressing the workpiece 1 with the pressure die 24 and the clamping die 26 and rotating the bending arm 25 in the direction of arrow F using the bending motor 29, the workpiece can be bent along the bending die 23. It is configured. It should be noted that the bending Tanabata 29, which is attached to this bending head 20, also operates in the above-mentioned positioning mode.
Like the 717, it is composed of a DC servo motor and a position sensor, and is configured to bend the workpiece 1 while checking the bending angle of the workpiece 1 at one rotation angle of the bending arm 250.

Furthermore, the above-mentioned bending head 20 is attached to the support column 19.
This is done via a bending direction adjustment member 30 that rotates the bending head 20 around the workpiece 1 and determines the bending direction of the workpiece 1 by the bending head 20.

As shown in FIG. 2 or 4, this bending direction adjusting section 4430 consists of a large gear 31 with a south end formed on the periphery and a base 21 of the bending head 20 attached to the center of the side surface, and a large gear 31 with a large tooth width. 31 rotatably supported, a small gear 33 provided inside this support frame 32 and meshed with the large gear 3'1, and the small gear 31 rotated to rotate the large gear 31! J1
A twist motor 34 for adjusting the bending direction of the bending head 20 is formed (1° 11).A notch 31a for attaching and detaching the workpiece 1 is formed in the large gear 31, and this notch 31a The workpiece 1 is inserted into the center of the groove, and the workpiece 1 is placed vertically in the bending position of the bending head 20 at a position of 1.delta.
111, the bending direction adjusting portion 1, 130 (′:J,
, drives the twist motor 34 and rotates the small gear 33,
By rotating the large gear 31 in the direction of the arrow shown in FIG. .

Twist to prevent rotation of the large tooth medium 31-E-ta 3"4
Similarly to the bending motor 29, the positioning motor 17 or (31) is composed of a DC1 node motor and a position sensor, and controls the rotation angle of the large gear 31, that is, the bending head 20.
The large gear 31 can be rotated while rotating the bending direction rJlCL'l.

Furthermore, the direction in which the large gear 31 is supported by the support frame 32 is as follows:
As shown in FIG. 5(a), the periphery of the large gear 31 is supported as it is, so-called sliding surface support, or as shown in FIG. 5(b)
As shown in FIG. 2, there are various methods such as so-called roller support, in which the periphery of the large gear 31 is supported using rollers 37.

In the bending apparatus of this embodiment configured as described above, the movable table 4 includes a positioning motor]7 and a twisting motor.
The hydraulic cylinders 27 .
A control device is provided for driving the bending motor 28 and the bending motor 29 to bend the workpiece 1.

FIG. 6 is a block diagram showing the configuration of the control device 50 and various drive motors and hydraulic cylinders to be controlled. As shown in the figure, the control 150 controls the positioning motor 17, the bending motor 29, and the DC rib motor 17a of the twisting motor 34.
, 29a, 34a.

and a drive circuit 51 that drives each hydraulic cylinder 27, 28.
~55, and output control signals to each of these drive circuits 51~55, as well as the positioning motor 17, the bending motor 29,
Position sensors 17b, 29b, 3/l of twist motor 34
The input/output port 56 inputs the detection signal from the bending device 56 and the workpiece 1
A command device 57 for inputting bending processing data Mya for shaping into a desired shape and one bending command word, and a command signal for inputting various command signals input to this command device 57. Human-powered boat 58 and command signal Kapo-1-
Various command signals inputted through 58, position sensors 17b and 29b panned through input/output ports.
, 34b, and bends the workpiece 1 according to a preset control blog. A ROM 60 in which various data are stored in advance, a RAM 61 in which data necessary to execute bending control is temporarily read and written in the same <CPtJ59, and a pass line 62 that connects each of the above parts and serves as a path for various data. , is composed of.

The bending process of the workpiece 1 input using the command device 57:
[Data M includes the bending position X of the workpiece 1 (position data on the 11th line 3 of the moving table 4 moved by the positioning motor 17) and the bending direction α (rotation of the bending head 20 rotated by the twisting motor 34) angle) and bending angle β (rotation angle of the bending arm 21 rotated by the bending motor 29), and according to a predetermined procedure, each bending position × 1...
The data are sequentially input to X x fty.

In this way, in the control device 50 of this embodiment, the command device 5
Bending processing control of the workpiece 1 will be executed according to the command signal inputted via the RO 7.
An example of a control program for bending control stored in M60 is shown in FIG. 7 and will be described. Note that the bending data M of the workpiece 1 has already been input via the command device 57,
It is assumed that the information is stored in the RAM 61.

As shown in the figure, in this bending control routine, step 100 is first executed, and the positioning motor 17 is driven to move the movable table 4 to the opposite width part of the rail 3 from the fixed table 2. [- Execute the initialization process (1 and step 1) to control the drive 34 to the state shown in FIG.
Move to 101-ru.

In step 110, it is determined whether or not a command signal to start bending is input via the command device 57, that is, whether the workpiece 1 is attached to the fixed base 2 and the operator receives a command signal to start bending. Decline whether or not it has been entered. Then, this bending: [Until the command signal g is input, the step 110 is repeated until the actual tjL, bending JJ(i
When the I command signal is input, the process moves to the next step 120.

In step 120, from the bending data M stored in advance and stored in the RAM 61, the bending data Dn at the farthest bending position Xn that has not yet been bent 1/0 is read. The process moves to step 130.

In step 130, the positioning motor 17 is driven to control the position of the movable table 4 to be the bending position xn of the bending data Mn read above. That is, this step 1
30, the position sensor 17b within the positioning unit 17
While checking the position of the moving platform 4 based on the detection signal from D.
The C revo motor 17a is driven to control the bending head 20 attached to the movable table 4 so that the bending position><n.

Next, in step 140, the twist motor 34 is driven according to the bending direction of the bending data Xn read in step 120 to control the rotation angle of the bending head 20 with respect to the workpiece 1, that is, the bending direction. Furthermore, this step 14
Similarly to step 140, the bending direction is controlled while checking the rotation angle of the bending head 200 based on the detection signal from the position sensor 1j 34b in the twister 34.

When the bending direction by the bending head 20 is lul-controlled in step 140, the process moves to step 150, and bending of the workpiece 1 is performed. This bending process is
First, the hydraulic cylinder 26 of the bending head 20 is driven to push the workpiece 1 into the bending mold 23 with the pressure mold 24, and the hydraulic cylinder 27 is driven to tighten the workpiece 26 and abut the workpiece 1. Step 120-C - The workpiece 1 is bent by rotating the bending motor 29 by the bending angle β'' of the read bending data Mn, and then each hydraulic sill 26 and 27 is returned to its original position. This is executed by releasing the workpiece 1 and rotating the two bending motors to their original positions.In addition, when rotating the bending motor 29 to bend the workpiece 1, step 13 is performed.
Similar to step 0 and step 140, this is executed while checking the rotation angle of the base bending arm 25, that is, the bending angle of the workpiece 1 based on the detection signal from the position sensor 29b in the bending motor 29.

When the bending of the workpiece 1 is completed according to the bending data Mn read in step 120 as described above, the process moves to step 160, and all bending data M stored in the RAM 56 are processed. Determine whether or not bending has been performed.

Then, if the bending process is completed at all bending positions, it is judged as YES in this step 160, and the process moves to step 100. If the bending process of the workpiece 1 is not yet completed, this step It is determined No in step 170, and the process moves to step 120 again.After that, step 12
0, the bending data M rl +1 for the bending position X n +1 is then read, and the bending process is performed in the same manner as above.

In this way, in the bending apparatus J3 of this embodiment, the movable table 4 is moved along the workpiece 1 fixed on the fixed table 2, and the bending l\foot 0 sequentially bends the workpiece 1 from the *η: part. Processing will be performed.

In addition, the bending direction tJ of the workpiece 1 by the bending head 20 is adjusted by the upper bending direction adjusting section +A30.
The bending process is determined by rotating around the nook 1, and the bending process is performed while the workpiece 1 is fixed.
Bending can now be performed without rotation, and even small-diameter workpieces can be bent well.

In this embodiment, the positioning motor 17 and the bending motor 29
, since DC Revo Shi-9 was used for the twist motor 34,
One position sensor is installed for detecting the rotational position, but if each of these sensors is configured using step E, there is no need to install a position sensor, and bending is not required. = [There is no need to use a sensor to confirm the position when executing control.

In addition, in this embodiment, one moving table is provided for each fixed table 2, but rails are provided on the left and right sides of the fixed table 2, and a moving table is provided on each rail. It became unnecessary to move 1 from both ends and make 1 damage.
This makes it possible to further improve the workability of bending.

Furthermore, in this embodiment, positioning gears 5 are provided on the first rib 3 and the skewers i''j, and the movable table 4 is moved by rotating the small gear 15 on this rack 5. 3 may be formed with a rack portion, and the movable platform may be moved by rotating a small gear on this rack.

[Effects of the Invention] As described above in detail, according to the bending apparatus of the present invention, when bending a workpiece, it is possible to bend the workpiece while keeping it fixed without rotating it. Therefore, even if the workpiece is of a small diameter with poor rigidity, it is possible to bend the workpiece well without deforming it, and productivity can be improved.

[Brief explanation of the drawing]

FIG. 1 shows the configuration of the present invention. FIGS. 2 to 7 show an embodiment of the present invention, and FIG. 2 shows the entire apparatus of this embodiment. - A perspective view, FIG. 3 is a side view showing the fixed base, FIG. 4 is a side view showing the movable base, and FIG. , FIG. 6 is a block diagram showing the configuration of a control device installed on the movable table and used for bending a workpiece, and FIG. 7 is a block diagram showing an example of bending control executed by the control device. -, l, Fig. 8 is a configuration diagram showing a conventional bending device, and Fig. 9 is an explanatory diagram showing a conventional bending jig used when bending a small-diameter workpiece.W , 1... Workpiece Ml, 23... Bending die M2.20... Bending head M3.2... Fixed stand M4.3... Rail M5.4... Moving stand M6... 1ffi Moving member Ml... Rotating member M8... Drive means 17... Positioning motor 29... Bending motor 30... Bending direction adjusting member 34... Twisting motor 50... Control device

Claims (1)

[Scope of Claims] A bending device that is equipped with a bending head that bends a rod-like or cylindrical workpiece along a bending mold, and that bends the workpiece into a desired shape, the workpiece being gripped and bent into a predetermined shape. a fixing stand fixed at a height of , a rail provided parallel to the work fixed to the fixing stand, and a rail slidably attached to the rail, the bending head being fixed by the fixing stand. a sliding member for moving the moving table along the rail to determine the bending position of the work; and a sliding member provided on the bending head mounting portion of the moving table. a rotating member that rotates the bending head around the workpiece on a plane orthogonal to the workpiece and determines the bending direction of the workpiece; and a rotating member that rotates the sliding member and the rotating member in a preset procedure. A bending device comprising: drive control means for controlling the bending position and bending direction of the workpiece according to the following.