JPH1085841A - Plate bending method and plate working machine utilizing this bending method and bending die - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a plate bending method and its device capable of bending with a high precision by positioning a die into a highly precise bending position without using bend correcting data. SOLUTION: In the case of bending the plate along a marking line KL, the marking line KL is detected with marking line detecting devices 45R, 45L provide in bending press dies 27 (27L, 27R), and a coordinate value is obtained with a coordinate measuring device 47. The positional relation and angle between the detected marking line KL and bending press dies 27 are calculated with operation processor 49, if necessary, the positional relation, etc., between bending press dies 27 and the marking line KL are corrected with a correction commanding device 51.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet material bending method, a sheet material processing machine using the method, and a bending die, and more particularly, to a sheet material bending method for bending along a scribe line. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method, a plate processing machine using the processing method, and a bending die.

[0002]

2. Description of the Related Art Conventionally, in a multi-tasking machine of a type in which a plate material held in the air is machined by a laser machine and left and right robots, the X, Y and Z of the laser machine are mechanically used. After matching the streets of the robot and the left and right robots, a method of actually performing trial processing, measuring the processed plate material, and performing necessary correction is adopted.

[0003]

However, in such a conventional technique, it is necessary to obtain correction data with a fine mesh with respect to the plate material surface in order to perform high-precision processing on the entire surface of the plate material. That is, it is necessary to store the correction data after performing the correction value measurement, take out the data stored at the time of processing, and reflect the data in the processing, and there is a problem that the processing process becomes complicated.

SUMMARY OF THE INVENTION An object of the present invention is to pay attention to the prior art as described above, and to position a presser die for bending to a highly accurate bending position without using bending correction data. It is an object of the present invention to provide a method of bending a sheet material capable of performing high-precision bending processing by using the method, a sheet material processing machine using the method, and a bending die.

[0005]

In order to achieve the above object, a method for bending a sheet material according to the first aspect of the present invention is a scribe line provided on one of a pair of bending press dies. Detecting the position of the scribe line that is scribed along the bend line by the detection device and the angle to the presser die for bending,
After aligning the tip of the bending presser die with the scribe line,
The plate material is bent by a bending die.

Accordingly, the scribe line detection device for the bending press die detects the scribe line scribed on the plate material and detects the positional relationship with the bending press die. By correcting the position, the tip of the bending press die can be accurately aligned with the scribe line. Therefore, there is no need to measure and store the bending correction data as in the related art.

According to a second aspect of the present invention, there is provided a method for bending a plate material, wherein the scribe line according to the first aspect is scribed on a surface on the inner side of the processed product.

Therefore, after the product is completed, the scribe line is hidden inside, so that the appearance is not hindered.

According to a third aspect of the present invention, there is provided a method for bending a plate material, wherein the scribe line according to the first or second aspect is scribed by a laser beam machine.

Therefore, in a multi-tasking machine having a laser beam machine and a bending machine, scribing, cutting, bending and the like can be performed by the same machine.

A plate material processing machine according to a fourth aspect of the present invention is a plate material processing machine which performs a bending process by aligning a pair of bending press dies with a scribe line scribed on the plate material. A scribe line detecting device provided on at least one side; a coordinate measuring device for obtaining the coordinates of the scribe line based on a signal from the scribe line detecting device; and the bending presser from the coordinates obtained by the coordinate measuring device. An arithmetic processing unit for calculating the position and the inclination angle of the scribe line with respect to the mold, and bending the tip of the bending presser die to match the scribe line based on the position and angle obtained by the arithmetic processing unit. And a correction command device for relatively moving the presser die relative to the plate material.

Therefore, when a plate material is bent along a scribe line, a scribe line detection device provided in the bending presser die detects the scribe line, and the coordinates of the scribe line are converted into coordinates. The arithmetic processing unit calculates the positional relationship and angle between the scribe line and the bending presser die based on the coordinate values, and if necessary, corrects the bending presser die and the plate material with the correction command device. Correct the positional relationship and the like.

According to a fifth aspect of the present invention, there is provided a plate material processing machine, wherein the scribe line detecting device according to the fourth aspect includes a plurality of sensors provided on a bending presser die.

Therefore, since the scribe line is detected by the plurality of sensors, the deviation angle between the bending press die and the scribe line can be detected.

According to a sixth aspect of the present invention, there is provided a plate processing machine according to the fourth or fifth aspect, further comprising a laser processing machine capable of marking a scribe line. .

Therefore, in a multi-tasking machine having a laser beam machine and a bending machine, scribing, cutting, bending and the like can be performed by the same machine.

According to a seventh aspect of the present invention, there is provided a sheet material processing machine comprising a robot capable of performing a bending process by mounting the bending presser die according to the fourth or fifth aspect. .

Accordingly, the robot of the plate material processing machine performs the bending of the plate material in accordance with the scribe line with the bending presser die.

According to a eighth aspect of the present invention, there is provided a bending mold comprising at least one position detecting device for detecting position information applied to a workpiece such as a scribe line. .

Therefore, for example, when performing bending with a bending die along a scribe line, the scribe line as position information is detected by the position detecting device, whereby accurate bending is performed.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 2 shows the entire three-dimensional plate processing machine 1 as a plate processing machine. The three-dimensional plate processing machine 1 has a substantially hemispherical cover 3 from which the inside can be visually recognized. The cover 3 has an entrance (not shown) for carrying in the plate material W and carrying out the product.

Inside the cover 3, a gate-shaped frame 7 is erected on a base 5. A guide rail 11 is laid on the upper surface of the upper beam 9 of the frame 7 in the X-axis direction (perpendicular to the plane of FIG. 2), and the guide member 13 moves and positions the guide rail 11 in the X-axis direction. A free X-axis carriage 15 is provided.

On the side surface of the X-axis carriage 15 (upper surface in FIG. 2), a Z-axis carriage 17 is provided so as to be movable and positioned in the Y-axis direction and the Z-axis direction. A three-dimensional laser processing head 19 as a laser processing machine is provided at the lower end of the Z-axis carriage 17, and moves up and down as the Z-axis carriage 17 moves up and down. This processing head 1
At the lower end of 9, a nozzle 21 for irradiating the laser beam LB is mounted.

On the other hand, the left and right sides on the base 5 (FIG. 2)
Robots 23L and 23R are provided opposite each other on both sides (middle left and right). Each of the robots 23L and 23R has an arm 25 rotatable around the A-axis by 360 degrees, and a bending presser die 27L and 27R for bending the plate material W at the end of the arm 25. Are installed. Although not shown, the robot 23
A mold magazine for exchanging tools mounted on the robots 23L and 23R is provided near the L and 23R.

A guide rail 29 is laid in the center of the base 5 in the X-axis direction, and a plate material shuttle 33 which is moved on the guide rail 29 by wheels 31 is provided. In the plate material shuttle 33, a plate material holder 35 for fixing the plate material W at the center portion is provided so as to be rotatable by four positions every 90 degrees corresponding to processing.

The laser processing head 19 and the robots 23L and 23R are located near the three-dimensional plate processing machine 1.
, And an NC device 37 for controlling the laser output. The size of the plate material W held by the plate material holder 35 is, for example, 1219 × 1219 mm.

That is, the three-dimensional laser processing head 1
As described above, the nozzle 9 can be moved and positioned in the X, Y, and Z axes, and the nozzle 21 can be moved by a certain amount in the W axis direction. Further, since the three-dimensional laser processing head 19 is rotatable in the A-axis and C-axis directions, the three-dimensional laser processing head 19 has four linear axes of X, Y, Z and W as a whole and six rotation axes of A and C axes. It consists of a shaft. The robot 23
L and 23R are three linear axes of X axis, Y axis and Z axis and arm 2
It is composed of four axes having the center A of 5 as a rotation axis.

Accordingly, the plate material W held by the plate material holder 35 is subjected to hole processing and product cutting processing by the three-dimensional plate material processing machine 1, and the bending press die 2 for the robots 23L and 23R.
Forming and bending can be performed by replacing 7L, 27R, and the like. Further, if necessary, the three-dimensional plate processing machine 1 performs welding to produce a product.

FIG. 3 shows bending press dies 27L and 27R and a bending die 39 mounted on the robots 23L and 23R. Arm 2 of left robot 23L
An angle detector 41 for detecting a bending angle of the plate material W is provided on the bending presser die 27L mounted on the 5L.

On the other hand, the arm 25R of the right robot 23R
A mold block 43 is mounted on the tip of the mold block 43. Inside the mold block 43, presser dies 27L and 27R for bending are provided.
In addition, a bending mold 39 is provided.

Therefore, the plate material W is sandwiched between the left bending presser die 27L and the right bending presser die 27R, and the right bending die 39 is moved in the Y-axis left direction (left in FIG. 3) by driving means (not shown). Direction), and the plate material W is bent by moving the tip of the bending mold 39 to the lower left. For this reason,
Accurately aligning the tip of the left bending presser die 27L with the scribe line KL (see FIG. 7) of the plate material W, which is the bending position, greatly affects bending accuracy.

FIGS. 4 to 6 show the left robot 23L.
Also, details of the left bending presser die 27L are shown. Referring to FIG. 4, a pair of sensors 45L, 4L,
5R is embedded so that a scribe line KL (see FIG. 7) scribed on the plate material W can be confirmed.
Further, by rotating the shaft S by the drive motor M, the left bending presser die 27L is moved in the left-right direction in FIG. 4 via the arm 25L.

Referring to FIG. 1, the NC device 37 comprises:
A coordinate measuring device 47 that receives the detection signals from the sensors 45L and 45R to determine the coordinate value of the scribe line KL; and a relative position between the bending presser die 27L and the scribe line KL based on the coordinate value from the coordinate measurement device 47. Processing unit 49 for determining the target position and angle, etc., and the robot 23L,
And a correction command device 51 for controlling each axis of the 23R.

Referring also to FIG. 7, when the positional relationship between the scribe line KL and the bending presser die 27L is shifted by the angle θ, the robot 23L in FIG. The bending presser die 27L is moved by axial feed (downward in FIG. 7), and the coordinate measuring device 47 reads the Z coordinate value ZL when the sensor 45L detects the scribe line KL. Further, the shaft is fed in the −Z-axis direction, and the sensor 45R is scribed line KL.
Is detected by the coordinate measuring device 47.

From the obtained coordinate values ZL and ZR, the arithmetic processing unit 49 calculates a correction amount around the A-axis of the robot 23L. That is, θ = sin ⁻¹ {(ZR−ZL) / XL} is obtained. The correction command device 51 includes the robots 23L, 23
By instructing the driving means for the R-A axis, the arm 25L is rotated by this correction amount θ to correct the angle of the bending presser die 27L.

Next, the robot 23L is moved again in the + Z-axis direction and in the -Z-axis direction to check the angle, and the tip of the bending presser die 27L is adjusted to the scribe line, and then bending is performed.

Next, referring to FIG. 8, a three-dimensional plate processing machine 1 will be described.
Will be described.

In order to manufacture a product P as shown in FIG. 8A, a bending line (ie, scribe line KL) shown by a two-dot chain line in FIG. Good. At this time, the surface on the side to be bent inward along the scribe line KL is inscribed.

Next, cutting is performed by the laser processing head 19 along a cutting line CL indicated by a solid line in FIG. At this time, if the product is completely cut, the product will drop, so a microjoint (not shown) is provided at a position that does not hinder processing so that the product can be held.

When the laser processing is completed, the left and right robots 23L and 23R are moved so that the tip of the bending presser die 27L of the left robot 23L is aligned with the scribe line KL. The coordinate system of the laser processing head 19 and the robot 23L,
Since the coordinate system of 23R is matched, the presser die for bending 27L
Is almost aligned with the position of the scribe line KL, but may not be adjusted depending on the bending of the plate material W or the mold. Therefore, the pair of sensors 45R and 45R provided on the bending press mold 27L are provided.
Using the 45L, the presser die for bending 27L is accurately fitted to the scribe line KL by the procedure described above.

When the tip of the left presser die 27L is accurately aligned with the scribe line KL, the left and right presser dies 27L,
The plate material W is sandwiched by 27R, the right bending die 39 is moved, and bending is performed on the left bending press die 27L side.
Thereafter, the product P is separated from the plate material W to complete the processing.

From the above results, the pair of sensors 45R, 45R
5L scribing line KL is automatically detected and the presser die for bending 2
Since the displacement between 7L and the scribe line KL is automatically corrected, correction data is not measured and stored as in the prior art, but the presser die for bending 27L is adjusted to the state of the plate material W and the bending die 39 at that time. Can be surely adjusted to the scribe line KL position. In addition, the bending can be performed based on the dimensional accuracy of the laser processing, not the mechanical accuracy of the robots 23L and 23R.

Further, since the scribe line KL is scribed inside the bend, the appearance of the product is not impaired.

The present invention is not limited to the above-described embodiment, but can be embodied in other modes by making appropriate changes. That is, in the above-described embodiment, the description has been given of the plate material processing machine 1 which is a combined processing machine having the laser processing head 19 and the bending robots 23L and 23R, but can be widely applied to other bending machines. .

Although the description has been given of the case where the scribing is performed by laser processing, the present invention is not limited to this, and can be applied not only to the bending but also to the positioning of the mold during the forming.

[0047]

As described above, in the method for bending a plate material according to the first aspect of the present invention, the scribe line detecting device for the presser die for bending detects the scribe line scribed on the plate material. Since the positional relationship with the presser die for bending is detected, the position of the presser die for bending can be corrected so that it can be accurately aligned with the scribe line. Therefore, it is possible to perform high-accuracy plate processing without measuring or storing bending correction data as in the related art.

In the method for bending a plate material according to the second aspect of the present invention, a scribe line is hidden inside after the product is completed, so that a product which does not impair the appearance can be manufactured.

In the method for bending a plate material according to the third aspect of the present invention, in a multi-tasking machine having a laser beam machine and a bending machine, marking, cutting, bending and the like can be performed by the same machine, so that the machining accuracy is improved. And the processing efficiency can be improved.

In the plate material processing machine according to the fourth aspect of the present invention, when the plate material is bent along the scribe line, the scribe line detection device provided on the bending press die detects the scribe line. , The coordinates of this scribe line are determined by a coordinate measuring device,
Since the arithmetic processing unit calculates the positional relationship and the angle between the scribe line and the bending presser die based on the coordinate values, the accurate position of the bending presser die with respect to the scribe line can be obtained. Thereby, if necessary, the correction command device corrects the positional relationship between the presser die for bending and the plate material and the like, so that high-precision processing can be performed.

In the plate processing machine according to the fifth aspect of the present invention, since the plurality of sensors detect the scribe line, the deviation angle between the presser die for bending and the scribe line can be detected.

In the plate material processing machine according to the sixth aspect of the present invention, in a combined processing machine having a laser processing machine and a bending processing machine, marking, cutting, bending and the like can be performed by the same machine, so that the processing efficiency is improved. Can be achieved.

In the plate material processing machine according to the seventh aspect of the present invention, the robot of the plate material processing machine performs bending of the plate material in accordance with the scribe line with the bending presser die.

In the bending die according to the eighth aspect of the present invention, for example, when the bending die is bent along the scribe line, the scribe line as the position information is detected by the position detecting device, so that the bending is performed accurately. It can perform flexible bending.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an NC apparatus of a sheet material processing machine to which a sheet material bending method according to the present invention is applied.

FIG. 2 is a front view showing the entire plate processing machine.

FIG. 3 is a front view showing a bending presser die and a processing state in the robot.

FIG. 4 is a detailed view of a left bending presser die.

FIG. 5 is a side view as viewed from a direction V in FIG. 4;

FIG. 6 is a cross-sectional view as viewed from a direction VI in FIG.

FIG. 7 is an explanatory diagram for obtaining an angle between a presser die for bending and a scribe line by a sensor.

FIG. 8 is an explanatory view showing a product reprocessed by a plate processing machine and a plate before processing.

[Explanation of symbols]

 Reference Signs List 1 plate processing machine 19 laser processing head (laser processing machine) 23 robot 27 bending presser die 45 sensor (scribing line detection device) 47 coordinate measuring device 49 arithmetic processing unit 51 correction command device KL marking line

Claims (8)

[Claims] 1. A position of a scribe line which is scribed along a bending line by a scribe line detecting device provided on one of a pair of bending press dies, and an angle with respect to the bending press die. A method of bending a sheet material, comprising detecting, aligning a tip of the presser die for bending with the scribe line, and bending the plate material using a bending die. 2. The method according to claim 1, wherein the scribe line is scribed on a surface on the inner side of the processed product. 3. The bending method according to claim 1, wherein the scribe line is scribed by a laser beam machine. 4. A plate material processing machine which performs a bending process by aligning a pair of bending press dies with a scribe line scribed on a plate material, wherein the scribe is provided on at least one of the bending press dies. A line detecting device, a coordinate measuring device that obtains the coordinates of the scribe line based on a signal from the scribe line detecting device, and the position of the scribe line with respect to the bending presser die from the coordinates obtained by the coordinate measuring device. An arithmetic processing device for calculating the tilt angle, and a bending presser die for the plate material to align the tip of the bending presser die with the scribe line based on the position and angle obtained by the arithmetic processing device. A plate processing machine, comprising: a correction command device for relatively moving the plate. 5. The plate material processing machine according to claim 4, wherein said scribe line detecting device includes a plurality of sensors provided on a bending presser die. 6. The plate processing machine according to claim 4, wherein the plate processing machine includes a laser processing machine capable of marking a scribe line. 7. The plate material processing machine according to claim 4, further comprising a robot capable of mounting the bending presser die and performing a bending process. 8. A bending mold comprising at least one position detecting device for detecting position information applied to a workpiece such as a scribe line.