JPH10113785A - Laser beam machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enlarge the effective utilization of the picture processing of the working part of a work by widening an image pickup range by a camera in a work table in the laser beam machine whose laser beam machining head moves in the horizontal direction. SOLUTION: A guide rail 13 is installed on an upper frame 11 positioned in the upside of a work table 9. A carriage 15 movable in the horizontal direction is installed on the guide rail, and the laser beam machining head 23 and a CCD camera 25 are installed on this carriage 15. The CCD camera 25 is constituted so that the camera optical axis CB of the CCD camera 25 is shifted to the one side horizontal to the laser beam optical axis LB of the laser beam machining head 23. Further, the laser beam machine is constituted by extending the guide rail 13 in the horizontal direction so that the carriage 15 is moved in the horizontal direction in between a first horizontal position in which the laser beam optical axis LB can be positioned at the right edge part of the work table 9 and a second horizontal position in which the camera optical axis CB can be positioned at the left edge part of the work table 9.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a laser processing apparatus provided with a camera for imaging a processed portion (for example, a processed hole) of a work.

[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 take an image of the processed part. Therefore, in a laser processing apparatus in which the laser processing head does not move in the horizontal direction, a camera that captures an image of a processed portion of a work is provided in the laser processing head.

[0003]

In a laser processing apparatus of the type in which the laser processing head does not move in the horizontal direction, the camera does not always need to move in the horizontal direction. If the camera cannot move in the horizontal direction, the imaging range of the work table is limited, which is not preferable in the laser processing apparatus of the type that moves to the side.

[0004]

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 above the work table. A laser processing apparatus comprising: a guide rail provided on a frame which has been provided; a carriage movable in a horizontal direction provided on the guide rail; and a laser processing head for irradiating the work with laser light from above in the carriage. A camera is provided in the carriage for imaging the workpiece processing section from above, and the camera is configured such that the camera optical axis of the camera is shifted to one side horizontal to the laser optical axis of the laser processing head. A first horizontal position at which the laser optical axis can be positioned at one end, and a second water position at which the camera optical axis can be positioned at the other end of the worktable. Between the position, and characterized by being constituted by stretching the guide rail so as to move the carriage in the horizontal direction to the horizontal direction.

As a second means, in addition to the invention-specifying means of the first means, in order to move the carriage, a screw member interlockingly connected to a drive motor is provided on the frame, and the screw member is screwed to the carriage. A screw member extending in the horizontal direction so as to move the carriage in the horizontal direction between the first horizontal position and the second horizontal position. .

As a third means, in addition to the invention-specifying items of the first or second means, an annular light for illuminating a work portion of the work from above is provided on the carriage so as to be able to move up and down by operating a lifting actuator. When viewed from the camera optical axis direction of the camera, the center of the field of view of the camera and the center of the light substantially coincide with each other.

According to the invention, the carriage is moved in one horizontal direction (one in the horizontal direction) while being guided by the guide rail (by rotating the screw member by driving the drive motor). Thereby, the laser processing head and the camera (including the light in the case where the invention is provided with the third means, can be integrally moved in the horizontal direction). Here, since the guide rail (screw member) extends in the horizontal direction, the carriage is moved to the first position.
It can be positioned in a horizontal position. At this time, the laser optical axis can be located at one end of the work table, and the camera optical axis can be located at one side of the one end of the work table.

Further, by moving the carriage in the other horizontal direction (one in the horizontal direction) while being guided by the guide rail, the laser processing head and the camera can be integrally moved in the other horizontal direction. . Here, since the guide rail extends in the horizontal direction, the carriage is moved to the second position.
It can be positioned in a horizontal position. At this time, the camera optical axis can be located at the other end of the work table, and the laser optical axis can be located at the other side of the other end of the work table.

As described above, by moving the carriage in the horizontal direction, the laser optical axis of the laser processing head and the camera optical axis of the camera can be positioned between one end and the other end of the work table. can do. In other words, the imaging range on the work table and the processing range on the work table are almost the same.

When calculating the center of gravity or the area of the processed portion of the work, the carriage is moved in the horizontal direction so that the camera optical axis of the camera can be positioned at the processed portion of the work.
(In the case where the invention specifies the third means,
By operating the lifting actuator, the light is lowered along the camera optical axis direction of the camera so as to approach the work part of the work, and the light illuminates the work part of the work. Then, the processed part of the work is imaged by the camera, and the image data is sent to the image processing device, and the center of gravity or the area of the processed part of the work is calculated by the image processing device.

[0011]

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

Referring to FIG. 1, a laser processing apparatus 1 according to an embodiment of the present invention includes a bed 3 extending in a horizontal front-back direction (a front-back direction in FIG. 1) and a center of the bed 3. And a portal frame 5 erected in the section. The bed 3 is provided with a pair of first guide rails 7 extending in the front-rear direction.
A work table 9 for supporting the work W is provided so as to be movable in the front-rear direction by driving a first servomotor (not shown).

Upper frame 11 of portal frame 5
Is located above the work table 9, the work table 9 is provided with a pair of second guide rails 13, and the pair of second guide rails 13 is provided with a second carriage 15 in a horizontal left-right direction ( 1 (in the left-right direction in FIG. 1). In order to move the second carriage 15 in the horizontal direction, the upper frame 11 is provided with a ball screw 19 interlockingly connected to a second servomotor 17. The second carriage 15 is screwed into the ball screw 19. Nut member 21 is provided. A laser processing head 2 for irradiating the second carriage 15 with laser light LB
The laser processing head 23 is movable in a vertical direction (vertical direction in FIG. 1) by driving a third servomotor (not shown).

The second carriage 15 is provided with a CCD camera 25 for capturing an image of a processed portion (for example, a processed hole) of the work W via a suitable support bracket 27.
The camera optical axis CB of the D camera 25 is
The CCD is shifted to the right with respect to the laser beam axis LB of
The camera 25 is configured. And work table 9
A first horizontal position where the laser optical axis LB can be positioned at the right end of the camera table, and the camera optical axis CB at the left end of the work table 9.
The second guide rail 13 and the ball screw 19 are configured to extend in the left-right direction so as to move the second carriage 15 in the left-right direction between the second horizontal position in which the second guide rail 13 can be positioned.

The second carriage 15 is provided with a light 29 for illuminating a processing portion of the work W, which can be moved up and down along the camera optical axis CB (up and down direction) of the CCD camera 25 by the operation of the elevating cylinder 31. The light 29 is formed in a donut shape (an example of an annular shape). When viewed from the camera optical axis CB direction of the CCD camera 25, the center of the visual field of the CCD camera 25 and the center of the light 29 are substantially coincident. (See FIG. 2).

Below the light 29, a donut-shaped work pressing member 33 for pressing the periphery of the processed portion of the work W from above is provided via an appropriate mounting member 35.

The CCD camera 25 is connected to an image processing device (not shown).
Based on the image data from the CD camera 25, the operation of calculating the center of gravity or the area of the processed portion of the work W is performed. Further, instead of providing the CCD camera 25 directly on the second carriage 15, the CCD camera 25 may be provided on the laser processing head 21 indirectly on the second carriage 15.

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

By rotating the ball screw 19 by driving the second servomotor 17 to move the second carriage 15 horizontally rightward while being guided by the second guide rail 13, the laser processing head 23 and the CCD
The camera 25 is integrally moved in the horizontal right direction. Here, since the second guide rail 13 and the screw member 19 extend in the left-right direction, the second carriage 15 can be positioned at the first horizontal position. At this time, the laser optical axis L of the laser processing head 23 is attached to the right end of the work table 9.
B can be positioned, and the camera optical axis CB of the CCD camera 25 can be positioned to the right of the right end of the work table 9.

The second carriage 15 is moved horizontally leftward while being guided by the second guide rails 13 by driving the first servomotor 17 to move the laser processing head 23 and the CCD camera 25 horizontally leftward. Move them together. Here, the second guide rail 13 and the ball screw 19
Is extended in the left-right direction, so that the second carriage 15 can be positioned at the second horizontal position. At this time,
The camera optical axis CB can be located at the left end of the work table, and the laser optical axis LB can be located to the left of the left end of the work table 9.

As described above, by moving the second carriage 15 in the left-right direction, the laser optical axis LB and the camera optical axis CB can be positioned between the right end and the left end of the work table 9, respectively. . In other words,
The imaging range on the work table 9 and the processing range on the work table 9 become the same.

The calculation of the center of gravity or the area of the processed portion of the work W is performed as follows.

By driving the second servo motor 17, the second carriage 15 is moved in the left-right direction to
5 and the light 29 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 CCD camera 2
5 when viewed from the optical axis CB direction of the CCD camera 2
The center of the visual field of 5 and the center of the processed portion of the work W can be made to substantially match. Next, the light 29 is lowered along the camera optical axis CB direction of the CCD camera 25 by driving the elevating cylinder 31 to move the light 29 to the workpiece W.
Closer to the processing part. At this time, the work pressing member 3
3 descends integrally with the light 29 and presses the peripheral edge of the processed portion of the work W from above.

Then, while the light 29 illuminates the processed portion of the work W, the CCD camera 25 captures an image of the processed portion of the work W. Further, the image data from the CCD camera 25 is sent to an image processing device (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.

When laser processing is performed on the work W, the first servomotor is driven to adjust the first position of the laser processing head 23 in the vertical direction.
The laser beam is emitted from the laser processing head 23 while moving the laser processing head 23 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 apparatus 1 of the type in which the laser processing head 23 moves horizontally in the horizontal direction, the second carriage 1
5 moves in the left-right direction, so that the CCD camera 25
And the light 29 also move in the left-right direction, so that the imaging range on the work table 9 can be expanded, and the work W
The effective use of the image processing of the processing unit is also expanded.

Further, since the imaging range on the work table 9 and the processing range on the work table 9 are substantially the same, the imaging range on the work table 9 can be further expanded, and the image processing of the processing section of the work W can be performed. Effective utilization is further expanded.

Since the light 29 can be moved up and down along the camera optical axis CB of the CCD camera 25 by operating the elevating cylinder 31, the processing portion of the work W is illuminated from a position close to the processing portion of the work W. CCD that suppresses the influence of disturbance light and captures an image of the processed part of the work W
The accuracy of the image data of the camera 25 is improved, and the efficiency of the image processing work of the processed part of the work W is improved.

[0029]

According to the invention described in any one of claims 1 to 3, in a laser processing apparatus of a type in which a laser processing head moves in a horizontal direction, the carriage has a horizontal position. By moving in the direction, the camera also moves in the horizontal direction, so that the imaging range on the work table can be expanded, and the effective use of the image processing of the processed part of the work is also expanded.

Further, since the imaging range on the work table is substantially the same as the image range on the work table, the imaging range on the work table can be further expanded.
Effective use of the image processing of the processed part of the work is further expanded.

According to the third aspect of the present invention, the light can be moved up and down along the camera optical axis direction of the camera by the operation of the elevating actuator, so that the work processing part can be moved from a position close to the work processing part. Can be illuminated, the influence of disturbance light can be suppressed, the accuracy of the image data of the CCD camera for imaging the processed part of the work is improved, and the efficiency of the image processing work of the processed part of the work is improved.

[Brief description of the drawings]

FIG. 1 is a schematic front view of a laser processing apparatus.

FIG. 2 is a view taken along the line II-II in FIG.

[Explanation of symbols]

 Reference Signs List 1 laser processing device 9 work table 11 upper frame 13 second guide rail 15 second carriage 17 servo motor 19 ball screw 21 nut member 23 laser processing head 25 CCD camera 29 light 31 elevating cylinder 33 work pressing member

Claims (3)

[Claims] 1. A work table for supporting a work is provided, a guide rail is provided on a frame positioned above the work table, a carriage movable in a horizontal direction is provided on the guide rail, and a work is provided on the carriage from above. A laser processing apparatus comprising: a laser processing head for irradiating a laser beam to a laser beam; a camera for capturing an image of a processed portion of a workpiece from above in the carriage, and a camera optical axis of the camera is a laser beam of the laser processing head. A camera is configured to be shifted to one side horizontal to the axis, a first horizontal position where the laser optical axis can be positioned at one end of the work table, and the camera optical axis is positioned at the other end of the work table. The guide rail is moved in the horizontal direction so as to move the carriage in the horizontal direction between the position and the second horizontal position. Laser processing apparatus characterized by being configured enlargement. 2. In order to move the carriage, a screw member connected to a drive motor is provided on the frame, and a nut member screwed on the screw member is provided on the carriage, and the carriage is moved to the first horizontal position. The laser processing apparatus according to claim 1, wherein the screw member is configured to extend in a horizontal direction so as to move in a horizontal direction between the second horizontal position and the second horizontal position. 3. An annular light for illuminating a processing portion of a workpiece from above in the carriage so as to be able to move up and down by operating a raising and lowering actuator. The laser processing apparatus according to claim 1, wherein the laser processing apparatuses are configured so that centers of the laser processing elements substantially coincide with each other.