JPH10128568A - Laser beam machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the efficiency of the image processing work of a part to be machined of a work, and to make an effective use of a space by constituting an upper end part of an air tube to be movable in the vertical direction relative to a carriage, and the air tube in a coil along the vertical direction. SOLUTION: Because an illumination device 27 is movable in the vertical direction by the action of an air cylinder 25, a part to be machined of a work W can be illuminated from the position close to the part to be machined of the work W, and the accuracy of the image data of a CCD camera 23 is improved by suppressing the influence of the diffused external light, and the efficiency of the image processing work of the part to be machined of the work W is improved. An air tube 39 itself is expanded/contracted in the vertical direction by constituting an air tube 39 in a coil when an air nozzle is moved in the vertical direction, and expansion of the air tube 39 itself is restricted, the space in the horizontal direction required for the air tube 39 is reduced as much as possible, and the space can be effectively used.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera for capturing an image of a processing portion (a processing hole) of a workpiece, an illumination device for illuminating the processing portion, and a laser processing machine having an air nozzle for blowing air to the processing portion. .

[0002]

2. Description of the Related Art In order to determine the center of gravity of a processed hole (worked portion) of a work and correct the positioning of the work, and to determine the quality of the work of the work by calculating the area of the worked hole of the work. It is necessary to image and illuminate the processed part. Therefore, in a laser processing machine in which the laser processing head does not move in the horizontal direction, the laser processing head is provided with a camera for imaging the processed part of the work, and the processed part of the work is provided below the work table. A lighting device for illuminating from below is provided.

Further, in order to clean the processed part of the work by removing dust and the like adhering to the processed part of the work, an air nozzle for blowing air from below to the processed part of the work is provided below the work table. Is provided. As a result, the processed portion cleaned by the camera can be imaged, and the image data from the camera becomes accurate.

[0004]

In the case of a laser beam machine in which the laser beam head does not move in the horizontal direction, the camera, the illuminating device and the air nozzle do not always need to move in the horizontal direction. In a laser beam machine in which the machining head moves in the horizontal direction, if the camera, the illumination device, and the air nozzle cannot move in the horizontal direction, the imaging range of the workpiece is limited, which is not preferable.

[0005]

In order to solve the conventional problems as described above, according to the present invention, as a first means, a work table for supporting a work is provided, and a work table is provided at a position above the work table. In a laser processing machine provided with a carriage movably in the horizontal direction and a laser processing head for irradiating a laser beam to the carriage, a camera is provided in the carriage to image a processing portion of a workpiece,
In addition, an illumination device for illuminating the work portion of the work is provided in the carriage so as to be vertically movable by actuation of an actuator, and an air nozzle for blowing air to the work portion of the work is provided in the illumination device. The lower end is connected, the upper end of the air tube is connected to an air supply source and is configured to be movable up and down with respect to the carriage, and the air tube is configured as a coil along the up and down direction. It is characterized by becoming.

As a second means, in addition to the invention-specifying means of the first means, the camera is configured such that the field of view of the camera is located at the center of the coil of the coiled air tube when viewed from below. It is characterized by becoming.

[0007] As a third means, in addition to the invention-specifying features of the first or second means, the illuminating device is provided with an annular light and an upper part provided below the light and around a work processing portion of the work. A work pressing member that presses the light from the direction, and is configured such that the center of the visual field of the camera substantially coincides with the light center of the light when viewed from below.

[0008] According to the invention, the carriage is moved in the horizontal direction, and the camera, the lighting device, the air nozzle and the air tube are integrally moved in the horizontal direction.
Thus, the field of view of the camera when viewed from above can be made to substantially match the processed portion of the workpiece.
Next, the illumination device is moved downward by the operation of the actuator, and the air nozzle is integrally moved downward, so that the illumination device and the air nozzle are brought close to the workpiece processing portion. At this time, the lower end of the air tube moves downward, and the air tube itself is extended downward by forming the air tube into a coil shape along the vertical direction. Then, the air nozzle blows air to the processed portion of the work, thereby removing dust and the like adhering to the processed portion of the work and cleaning the processed portion of the work.

After cleaning the processed portion of the work (in some cases, the light is further moved downward by the operation of the actuator to approach the processed portion of the work), the illumination device illuminates the processed portion of the work. Then, the processed part of the work is imaged by the camera. Then, the image data captured by the camera is sent to the image processing device, and the image processing device calculates, for example, the center of gravity or the area of the processed portion. In the case where the invention specific matter of the third means is provided, the work pressing member of the lighting device is further moved downward by actuating the actuator before imaging the processed part of the work by the camera. The work area around the work is pressed from above to fix it to the work table.

After the processing section is imaged by the camera, the illumination device is moved upward by the operation of the actuator, and the air nozzle is integrally moved upward.
Thereby, the lighting device can be separated from the work. At this time, the lower end of the air tube moves upward, and the air tube itself is contracted upward because the air tube is formed in a coil shape along the vertical direction.

[0011]

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

Referring to FIG. 1, a laser beam machine 1 according to an embodiment of the present invention includes a bed 3 extending in the front-rear direction (in FIG.
And a portal frame 5 erected in the central portion of the vehicle. The bed 3 is provided with a pair of first guide rails 7 extending in the front-rear direction, and the pair of first guide rails 7 has a work table 9 for supporting a work W provided by a first servomotor (not shown). It is provided to be movable in the front-rear direction by driving.

Upper frame 11 of portal frame 5
Is located above the work table 9,
A pair of second guide rails 13 are provided on the upper frame 11 so as to extend in the left-right direction (left-right direction in FIG. 1). A carriage 15 is provided on the pair of second guide rails 13 with a second servomotor 17 and a ball screw. 19 is provided so as to be movable in the left-right direction by driving. The above carriage 15
Is provided with a laser processing head 21 for irradiating a laser beam, and the laser processing head 21 is movable in a vertical direction (vertical direction in FIG. 1) by driving a third servomotor (not shown). The laser processing head 21 is optically connected to a laser oscillator (not shown) via a photoconductive device (not shown).

The carriage 15 is provided with a CCD camera 23 for picking up a processed portion (for example, a processed hole) of the work W via a suitable support bracket 25. The carriage 15 illuminates the processed portion of the work W. A lighting device 27 is provided so as to be vertically movable by the operation of an air cylinder 29. The lighting device 27 includes an annular light 31,
A work pressing member 35 is provided below the light 31 via a spring 33 and presses the periphery of the processed portion of the work W from above. Here, as shown in FIG. 4, when viewed from below, the center of the camera visual field of the CCD camera 23 and the light center of the light 31 substantially match.

Referring to FIG. 2, an air nozzle 37 for blowing air to a processed portion of the work W is provided at an appropriate position of the work pressing member 35 in the illumination device 27.
The lower end of a rubber air tube 39 is connected to the air nozzle 37. The upper end of the air tube 39 is connected to an air supply source common to the air cylinder 29 (not shown).
, So that the carriage 15 cannot move in the vertical direction. In order to make the air tube 39 extendable up and down, the air tube 39 is formed in a coil shape along the vertical direction. As shown in FIG. 5, when viewed from below, the field of view of the CCD camera 23 is located at the center of the coil of the coiled air tube 39.

Next, the operation of the embodiment of the present invention will be described.

The carriage 15 is moved in the left and right directions by the driving of the second servomotor 17 so that the CCD camera 23,
The lighting device 27 and the air nozzle 37 are integrally moved in the left-right direction. The work table 9 is moved in the front-rear direction by driving the first servomotor. Thereby, the view of the camera of the CCD camera 23 can be made to substantially coincide with the processed portion of the work W when viewed from above.

Next, the illumination device 27 is moved downward by the operation of the air cylinder 29, and the air nozzle 37 is moved downward integrally. Get closer. At this time, the lower end of the air tube 39 moves downward, and the air tube 39 is formed in a coil shape along the vertical direction, so that the air tube 39 itself extends downward as shown in FIG. . Then, the air nozzle 37 blows air to the processed portion of the work W, thereby removing dust and the like adhering to the processed portion of the work W and cleaning the processed portion of the work W.

After cleaning the processed portion of the work W, the illuminating device 27 is further moved downward by the operation of the air cylinder 29, and the work pressing member 35 of the illuminating device 27 moves the vicinity of the processed portion of the work W from above. Press to fix the work table 9.

The light 31 in the lighting device 27
Illuminates the processing part of the work W by the CCD camera 2
An image of the processed part of the work W is taken by 3. CCD camera 2
The image data from 3 is sent to an image processing apparatus (not shown), and the center of gravity or the area of the processed portion of the work W is calculated based on the image data.

After the processing portion of the work W is imaged, the lighting device 27 is moved upward by the operation of the air cylinder 29, and the air nozzle 37 is moved integrally upward. Thus, the lighting device 27 can be separated from the work W. At this time, the lower end of the air tube 39 moves upward, and the air tube 39 itself is contracted upward by forming the air tube 39 in a coil shape along the vertical direction.

When laser processing is performed on the workpiece W, the first servomotor is driven to adjust the first position of the laser processing head 21 in the vertical direction.
The laser beam is irradiated on the workpiece W by the laser processing head 21 while the laser processing head 21 is moved in the front-rear and left-right directions relative to the work table 9 by driving the servo motor and the second servo motor 17.

As described above, according to the embodiment of the present invention, in the laser processing machine 1 of the type in which the laser processing head 21 moves in the front-rear direction, the carriage 15 moves in the left-right direction so that the CCD camera is moved. 23, lighting device 2
7, and the air nozzle 37 move integrally in the left-right direction, so that the imaging range of the work W can be expanded.
The effective use of the image processing of the processing part of the work W is also expanded.

Further, since the illumination device 27 can be moved in the vertical direction by the operation of the air cylinder 29, the processing portion of the work W can be illuminated from a position close to the processing portion of the work W. By suppressing the influence, the accuracy of the image data of the CCD camera 23 is improved, and the efficiency of the image processing operation of the processing portion of the work W is improved. In addition, by providing the air nozzle 37 in the lighting device 27, it is possible to take an image of the processed portion that has been cleaned in advance using the CCD camera 23,
The accuracy of the image data from the D camera 23 is further improved, and the efficiency of the image processing operation is further improved.

Further, since the air tube 39 is formed in a coil shape, when the air nozzle 37 is moved in the vertical direction, the air tube 39 itself expands and contracts up and down, and the air tube 39 itself expands in the horizontal direction. Since it is suppressed, the horizontal space required for the air tube 39 can be made as small as possible, and the space can be effectively used in the peripheral portion of the laser processing head 21.

[0026]

As described above, according to any one of the first to third aspects of the present invention, there is provided a laser processing machine in which a laser processing head moves in a horizontal direction. When the carriage moves in the horizontal direction, the camera, illumination device, and air nozzle also move in the horizontal direction, so that the imaging range of the work can be expanded, and the effective use of image processing in the work processing part of the work also increases. I do.

In addition, since the illumination device can be moved up and down by the operation of the actuator, the work portion of the work can be illuminated from a position close to the work portion of the work, and the influence of disturbance light can be suppressed. In addition, the accuracy of image data from the camera is improved, and the efficiency of the image processing work of the processed part of the work is improved. In addition, by providing the air nozzle in the lighting device, the processed portion cleaned in advance can be imaged by the camera, so that the accuracy of the image data from the camera is further improved, and the efficiency of the image processing operation is further improved.

Since the air tube is formed in a coil shape along the vertical direction, when the air nozzle is moved in the vertical direction, the air tube itself expands and contracts up and down, thereby suppressing the air tube itself from expanding in the horizontal direction. , The horizontal space required for the air tube can be minimized,
Space can be effectively used in the peripheral portion of the laser processing head.

[Brief description of the drawings]

FIG. 1 is a schematic front view of a laser beam machine.

FIG. 2 is a diagram showing a main part of the embodiment of the present invention.

FIG. 3 is a diagram showing the operation of the embodiment of the present invention.

FIG. 4 is a view taken along the line IV-IV in FIG. 2;

FIG. 5 is a view along the line V-V in FIG. 2;

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 laser processing machine 5 portal frame 9 work table 15 carriage 21 laser processing head 23 CCD camera 27 lighting device 29 air cylinder 31 light 35 work pressing member 37 air nozzle 39 air tube

Claims (3)

[Claims] 1. A laser processing machine comprising: a work table for supporting a work; a carriage provided at a position above the work table so as to be movable in a horizontal direction; and a laser processing head for irradiating the carriage with laser light. A camera for imaging the processed part of the work is provided in the carriage, and an illumination device for illuminating the processed part of the work is provided in the carriage so as to be vertically movable by actuation of an actuator. An air nozzle that blows out air is provided, a lower end of an air tube is connected to the air nozzle, and an upper end of the air tube is configured to communicate with an air supply source and move vertically with respect to the carriage, A laser processing machine, wherein the air tube is formed in a coil shape along a vertical direction. 2. The camera according to claim 1, wherein a field of view of the camera is positioned at a center of the coil of the coiled air tube when viewed from below.
2. The laser beam machine according to claim 1. 3. The illuminating device includes an annular light, and a work pressing member provided below the light and pressing a periphery of a processed portion of the work from above, and the camera is viewed from below. 3. The laser beam machine according to claim 1, wherein the center of the camera field of view and the light center of the light substantially coincide with each other.