KR20100044413A - Apparatus for processing using laser-beam - Google Patents

Abstract

PURPOSE: An optical head device for processing a work piece using a laser is provided to measure the temperature of the work piece in real time, and to locate various sensors and cables in the inside of the device. CONSTITUTION: An optical head device for processing a work piece using a laser comprises a body(10), an optical fiber(31), a beam shaping lens set unit, a first beam splitter, a first total reflection mirror, a focal distance adjustment lens unit, and a rotating unit(20). The rotating unit receives the first beam splitter and the first total reflection mirror. A condenser lens is installed on one side of the rotating unit. The rotating unit rotates the first beam splitter and the first total reflection mirror while maintaining the same perpendicular line.

Description

Apparatus for processing using laser-beam

The present invention relates to an optical head device for processing a workpiece using a laser, and more particularly, to minimize the radius of movement during rotation of the optical head to expand the working area of the machine tool, and to set the temperature of the workpiece by the installation of a pyrometer. The present invention relates to an optical head device for processing a workpiece using a laser, which can measure in real time, and is designed to structurally locate various sensors and cables therein.

In general, the processing of materials using a laser is rapidly expanding the field of application throughout the industry. The excellent characteristics of the laser material processing are laser processing is replacing the existing process in the heat treatment, welding, drilling process, etc., thereby improving the quality and reliability and productivity. Important advantages of this laser machining include precision, process flexibility, non-contact machining and minimal heat affected zones.

In recent years, efforts have been made to maximize the efficiency, precision and productivity of parts by combining the advantages of laser processing with existing machine tools (eg lathes). This is a technology in which advanced laser technology and existing machining technology can be mutually complemented, and the necessity of a multi-tasking machine using this technology is increasing.

As an example of the complex machining, the laser beam is integrated into the lathe machine tool to improve the machining efficiency, and the local heat treatment (no need for quenching), marking, drilling, welding, cutting and grooving are performed using the laser beam. At the same time, or continuously with the workpiece set, to improve precision and reduce machining time. (Reduce the multi-step process to one step). In addition, materials that are difficult to cut (tungsten, ceramic, etc.) can significantly improve the machinability (productivity) and precision by heating the machining portion with a laser beam during cutting. In addition, it is possible to provide flexibility in material selection and design by machining materials that cannot be processed using multi-processing technology.

As mentioned above, in order to realize the complex machining using the laser, the development of a new concept of the laser beam transport optical module is essential, and in order to increase the productivity, which is an advantage of the complex machining, a system for rapidly changing the machining tool should be provided. To this end, a new concept of a beam transporting device and a processing head has to be designed, but such research and development remains insignificant.

On the other hand, the present applicant has applied for a number of inventions (registration number: 10-0597906, 10-0597907, 10-0704225) to solve the above problems, but such an optical system is a revolver-type optical system The volume is too large to narrow the interlock section of the existing equipment, and the movement radius of the actual optical module is increased, which causes a limitation in processing. There was a problem, and due to the structural constraints of the optical system, there was a problem of insufficient space to install a pyrometer.

An object of the present invention is to minimize the radius of movement during the rotation of the optical head to expand the work area of the machine tool, to provide a space for installing the pyrometer to measure the temperature of the workpiece in real time, structurally various sensors and cables It is to provide an optical head device for processing a workpiece by using a laser according to the invention easy to position the inside.

An object of the present invention as described above, the main body coupled to the machine tool; An optical fiber provided at the rear of the main body to guide a laser beam generated from a laser source into the main body; A beam shaping lens set unit provided in the main body and having a plurality of beam shaping lenses to vary and vary the shape and size of the laser beam introduced from the optical fiber; A first beam splitter provided inside the main body to change a path of the laser beam introduced through the optical fiber and the beam shaping lens set in a downward direction; A first total reflection mirror positioned below the first beam splitter on the same vertical line as the first beam splitter and horizontally changing a path of a laser beam; A focal length adjusting lens unit horizontally conveyed to adjust the size and focal length of the laser beam introduced by the first total reflection mirror; And a rotating part accommodating the first total reflection mirror and a focal length adjusting lens part, and having a focusing lens configured to irradiate a workpiece by focusing a laser beam on one side thereof;

The rotating unit is achieved by an optical head device for processing a workpiece using a laser, characterized in that the first total reflection mirror and the first beam splitter are configured to rotate while maintaining the same vertical line.

Here, the beam shaping lens set portion is preferably configured in the form of a revolver, and the rotating portion is a focusing lens side to which the laser beam is irradiated to the workpiece to prevent the dust and gas generated from the workpiece into the rotating portion It is preferable to further include a protective window in the upper part of the main body is provided with a wiring input and output unit arranged in a horizontal space and the accommodating space of the pyrometer unit to unify the path of the line and the second total reflection mirror inside the pyrometer portion and It is preferable to comprise a pyrometer which receives infrared rays from the second total reflection mirror to measure heat generated in the workpiece.

According to an optical head apparatus for processing a workpiece using a laser according to the present invention, different lasers may be selectively irradiated through a revolver-type beam shaping lens set unit and a focal length adjusting lens unit, thereby providing a separate process and apparatus. There is an effect that can perform a variety of laser processing in a batch, continuously without added.

In addition, it is possible to automatically adjust or arbitrarily adjust the focal point, the incident angle, etc. of the laser according to the object of the workpiece to ensure the safety of the device, and the effect of changing the irradiated laser to the characteristics of the workpiece.

In addition, it is possible to extend the working area of the machine tool by minimizing the radius of movement when the optical head is rotated, and to measure the temperature of the workpiece in real time by providing a space to install the pyrometer, and structurally various sensors and cables inside It has the advantage of being easy to locate.

Hereinafter, with reference to the accompanying drawings showing a preferred embodiment of the present invention will be described in detail.

1 is a perspective view of an optical head device for processing a workpiece by using a laser according to the present invention, Figure 2 is a vertical cross-sectional view of Figure 1, the present invention as shown, the body 10 and the optical fiber 31 ), A beam shaping lens set unit 40 including a plurality of beam shaping lenses 41 and 42, a first beam splitter 51, a first total reflection mirror 61, and a focal length adjusting lens unit ( 70 and a focusing lens 81 and a rotating unit 20 interposed between the main body 10.

The main body 10 is coupled to a main body or tool post of a machine tool (not shown).

The optical fiber 31 is for guiding a laser beam generated from a laser generation source (not shown) for generating a laser to the inside of the main body 10. For this purpose, one side is connected to the laser generation source, and the other side is the main body 10. It is provided in the rear of the main body 10 in a form that is embedded in. At this time, the optical fiber 31 is connected to the main body 10 through an optical coupler, such as Patent No. 10-597906, filed by the present applicant to prevent the spread of the laser beam guided into the main body 10. It is preferable to combine.

As shown in FIGS. 2 and 3, the beam shaping lens set part 40 is provided in the space 13 provided inside the main body 10 to adjust the shape and size of the laser beam introduced from the optical fiber 31. It is preferable to configure a revolver type in a configuration having a plurality of beam shaping lenses 41 and 42 so as to be varied and irradiated.

That is, the beam shaping lens set unit 40 according to the present invention includes a plurality of beam shaping lenses 41 and 42 on a circular plate 43 having a central axis, thereby rotating the circular plate 43 by a driving unit (motor, etc.). Can be changed to square, triangular, circular and linear, or at the same time the size of the laser beam can be changed. Here, any one of the plurality of beam shaping lenses 41 and 42 constitutes a circular plate 43 and a driver so as to have the same horizontal line as the optical fiber 31.

The first beam splitter 51 has a beam shaping lens 41 having the same horizontal line as the optical fiber 31 and the optical fiber 31 in the space 14 provided in the front upper portion of the main body 10. It is provided so as to have the same horizontal line, and as shown in Figure 2 to change the path of the laser beam in the downward direction.

In this case, the first beam splitter 51 may be configured to reflect the laser beam and transmit infrared light for temperature measurement and visible light for image observation.

The first total reflection mirror 61 is positioned below the first beam splitter 51 on the same vertical line as the first beam splitter 51 and changes the path of the laser beam from vertical to horizontal. It is provided in the inside of 20.

The focal length adjusting lens part 70 is provided inside the rotating part 20 like the first total reflection mirror 61, and is positioned on the same horizontal line as the first total reflection mirror 61 and has a first total reflection mirror ( 61) is configured to move horizontally left and right to adjust the size and focal length of the laser beam introduced by.

The focal length adjusting lens unit 70 has a rail 71, 72, a focal length adjusting lens 73 guided to the rails 71, 72, and a focal length adjusting lens 73. The driving unit 74 may be configured to move the focal length adjusting lens 73 to the left and right to be moved along the 71 and 72.

The rotating unit 20 accommodates the first total reflection mirror 61 and the focal length adjusting lens unit 70, and on one side, a focusing lens 81 is provided to focus the laser beam and irradiate the workpiece to the front of the main body 10. It is comprised so that the 1st total reflection mirror 61 and the 1st beam splitter 51 may rotate, maintaining the same vertical line in the structure interposed between the upper side and the front lower side.

In addition, the rotating part 20 has a protective window 21 on the side of the focusing lens 81 to which the laser beam is irradiated to the workpiece so as to prevent dust and gas generated from the workpiece 100 from being introduced into the rotor 20. ) Is further provided, and may further include a device for protecting the lens by injecting a protective gas.

Meanwhile, in the present invention, as shown in FIG. 4, an accommodation space of the wiring input / output unit 11 and the pyrometer unit 12 arranged horizontally on the upper part of the main body 10 is provided to unify the path of the line. The pyrometer part 12 has a second total reflection mirror positioned above the same vertical line as the first beam splitter 51 and reflecting infrared rays for measuring the temperature introduced from the first beam splitter 51 ( 62) and a pyrometer 91 which receives infrared rays for temperature measurement from the second total reflection mirror 62, and may be configured to measure heat generated in the workpiece.

In addition, the pyrometer part 12 has a second total reflection which is located above the same vertical line as the first beam splitter 51 and reflects visible light for observing the image introduced from the first beam splitter 51. The camera 62 may be configured to receive visible light from the mirror 62 and the second total reflection mirror 62 for image observation, and display the processing state of the workpiece on a display device (monitor, etc.) to visually identify the object. have.

Meanwhile, the pyrometer part 12 is positioned above the same vertical line as the first beam splitter 51 and reflects infrared rays for measuring the temperature introduced from the first beam splitter 51 and performs image observation. Visible light has a second beam splitter 52 and a pyrometer 91 for receiving the infrared rays from the second beam splitter 52, the same vertical line as the second beam splitter 52 It is provided with a second total reflection mirror 62 and a camera 92 for receiving the visible light from the second total reflection mirror 62, which is located above the image and reflects the visible light introduced from the second beam splitter 52, It can be configured to simultaneously perform the function of visually identifying the processing situation of the workpiece and the heat generated from the workpiece at the same time.

Here, the pyrometer 91 is a pyrometer, and refers to a device that detects infrared rays emitted during thermal reactions in the workpiece 100 and converts them into temperatures.

6 to 8 is an embodiment showing that the size of the laser beam generated in the optical head device for processing a workpiece by using a laser according to the present invention, the focal length adjustment of the focal length adjusting lens unit 70 It shows that the lens 73 is in different positions.

That is, as the focal length adjusting lens 73 is moved left and right by the driving unit 74, the size and focal length of the laser beam are changed, and although not shown, a beam shaping lens set unit provided at the rear side of the main body 10. The size and shape of the laser beam may vary depending on which beam shaping lenses 41 and 42 of 40 are used.

9 and 10 are views showing a path in which visible light and infrared rays generated in a workpiece are moved to a pyrometer and a camera in an optical head apparatus for processing a workpiece by using a laser according to the present invention, where L1 is for image observation. Visible light and L2 is infrared for temperature measurement. That is, when the infrared ray L2 and the visible light L1 generated from the workpiece enter the inside of the main body 10, the infrared beam L1 is transmitted to the first beam splitter 51 through the reflection of the first total reflection mirror 61. The first beam splitter 51 transmits both the infrared ray L2 and the visible light L1 to the second beam splitter 52, and the second beam splitter 52 transmits the infrared light L2. Reflected and visible light (L1) is a property of transmitting so infrared (L2) is led to the pyrometer 91, visible light (L1) is transmitted to the second total reflection mirror 62 is guided to the camera 92. Therefore, in the present invention, the temperature of the workpiece 100 can be checked in real time, and the machining state can be grasped by the operation of the camera 92 at the time of manual operation, thereby realizing precise and safe operation.

Although the present invention has been described in connection with the preferred embodiment, those skilled in the art will be able to easily make various changes and modifications without departing from the essential characteristics of the present invention. Therefore, the disclosed embodiments should be considered in descriptive sense only and not for purposes of limitation, and the true scope of the present invention is shown in the appended claims rather than the foregoing description, and all differences within the equivalent scope are included in the present invention. Should be interpreted as.

1 is a perspective view of an optical head device for processing a workpiece using a laser according to the present invention;

2 is a cross-sectional view of FIG.

3 is a cross-sectional view taken along line A-A of FIG.

4 is a front view of FIG. 1,

5 is a rear view of FIG. 1;

6 to 8 is an embodiment showing that the size of the laser beam generated in the optical head device for processing a workpiece using a laser according to the present invention,

9 and 10 are views showing a path in which visible light and infrared rays generated in a workpiece are moved to a pyrometer and a camera in an optical head apparatus for processing a workpiece using a laser according to the present invention.

Description of the Related Art

10: Main body 11: Wiring I / O part

12: pyrometer portion 20: rotating part

21: Protection window 31: Fiber optic

40: beam shaping lens set unit 51: first beam splitter

52: second beam splitter 61: first total reflection mirror

62: second total reflection mirror 70: focal length adjusting lens unit

81: focusing lens 91: pyrometer

92: camera

Claims (7)

A main body 10 coupled to the machine tool; An optical fiber 31 provided at the rear of the main body 10 to guide a laser beam generated from a laser source into the main body 10; The beam shaping lens set part 40 provided in the main body 10 and provided with a plurality of beam shaping lenses 41 and 42 so as to vary and vary the shape and size of the laser beam introduced from the optical fiber 31. ); A first beam splitter 51 provided inside the main body 10 to change a path of the laser beam introduced through the optical fiber 31 and the beam shaping lens set 40 downward; A first total reflection mirror 61 positioned below the first beam splitter 51 on the same vertical line as the first beam splitter 51 and horizontally changing the path of the laser beam; A focal length adjusting lens part 70 which is horizontally conveyed to adjust the size and focal length of the laser beam introduced by the first total reflection mirror 61; A focusing lens 81 for accommodating the first total reflection mirror 61 and the focal length adjusting lens part 70 and focusing the laser beam on one side thereof is provided with a rotating part 20 interposed between the main body 10. Including; The rotating unit 20 is an optical head device for processing a workpiece using a laser, characterized in that the first total mirror (61) and the first beam splitter (51) is configured to rotate while maintaining the same vertical line. The method of claim 1, The beam shaping lens set unit 40 is an optical head device for processing a workpiece by using a laser, characterized in that configured in the form of a revolver (revolver). The method of claim 1, The rotating part 20 further includes a protective window 21 on the focusing lens 81 side at which the laser beam is irradiated onto the workpiece so as to prevent dust and gas generated from the workpiece 100 from being introduced into the rotating part 20. An optical head device for processing a workpiece using a laser, characterized in that provided. The method of claim 1, The upper part of the main body 10 to provide a receiving space of the wiring input and output unit 11 and the pyrometer unit 12 arranged horizontally to process the workpiece using a laser, characterized in that the path of the line is unified. Optical head device for. The method of claim 4, wherein The first beam splitter 51 is configured to reflect the laser beam and transmit infrared rays for temperature measurement, A second total reflection mirror 62 and a second mirror 62 positioned above the same vertical line as the first beam splitter 51 and reflecting infrared rays introduced from the first beam splitter 51 are formed on the pyrometer part 12. 2 is equipped with a pyrometer 91 which receives infrared rays from the total reflection mirror 62, An optical head device for processing a workpiece by using a laser, characterized in that configured to measure the heat generated in the workpiece. The method of claim 4, wherein The first beam splitter 51 is configured to reflect the laser beam and transmit visible light for image observation, A second total reflection mirror 62 and a second total reflection mirror 62 are positioned on the same vertical line as the first beam splitter 51 and reflect visible light introduced from the first beam splitter 51. 2 is provided with a camera 92 for receiving visible light from the total reflection mirror 62, An optical head device for processing a workpiece by using a laser, characterized by visually identifying the machining situation of the workpiece. The method of claim 4, wherein The first beam splitter 51 is configured to reflect the laser beam and transmit infrared light for temperature measurement and visible light for image observation. The second beam splitter 12 is positioned above the same vertical line as the first beam splitter 51 and reflects infrared rays introduced from the first beam splitter 51 and transmits visible light. It is provided with a pyrometer 91 for receiving the infrared ray introduced from the rotor 52 and the second beam splitter 52, Visible from the second total reflection mirror 62 and the second total reflection mirror 62 which are positioned on the same vertical line as the second beam splitter 52 and reflect the visible light introduced from the second beam splitter 52. With a camera 92 that receives light, An optical head device for processing a workpiece using a laser, characterized in that it is configured to visually identify the machining situation of the workpiece and to measure heat generated from the workpiece.

Images