KR20160119470A - Marking system using fiber laser - Google Patents

Marking system using fiber laser Download PDF

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Publication number
KR20160119470A
KR20160119470A KR1020150048164A KR20150048164A KR20160119470A KR 20160119470 A KR20160119470 A KR 20160119470A KR 1020150048164 A KR1020150048164 A KR 1020150048164A KR 20150048164 A KR20150048164 A KR 20150048164A KR 20160119470 A KR20160119470 A KR 20160119470A
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South Korea
Prior art keywords
optical fiber
fiber laser
laser
unit
beam focusing
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KR1020150048164A
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Korean (ko)
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KR101724194B1 (en
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박재길
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박재길
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    • B23K26/0066—
    • B23K26/0081—
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/02—Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
    • B23K26/06—Shaping the laser beam, e.g. by masks or multi-focusing

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  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Mechanical Engineering (AREA)
  • Laser Beam Processing (AREA)

Abstract

A marking system using an optical fiber laser is disclosed. According to an embodiment of the present invention, there is provided a marking system using an optical fiber laser, comprising: a laser generation unit for generating an optical fiber laser; And a scan head that receives an optical fiber laser from the laser generation unit through an optical fiber and focuses the optical fiber laser to mark the shape of the object to be marked by irradiating the laser beam onto the object to be marked, ; A beam focusing unit detachably coupled to the main body and configured to focus an optical fiber laser transmitted from the laser generating unit; And a scanner unit which is provided in the main body and irradiates the optical fiber laser focused by the beam focusing unit onto the marking object.

Description

[0001] MARKING SYSTEM USING FIBER LASER [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a marking system using an optical fiber laser, and more particularly, to a marking system using an optical fiber laser for black marking letters, drawings, figures, etc. by irradiating an optical fiber laser on a surface of an object to be marked.

In general, laser marking is a technique of engraving a desired character or figure by melting, etching, or discoloring a part of an object surface using a laser beam as a light source.

This laser marking uses a laser beam as a direct processing means compared to the conventional ink jet printer or silk printing method. Therefore, it is possible to perform non-contact and permanent marking, so that there is no fear of being erased and high-precision and clear marking is possible There are various advantages such as being made.

The laser marking method is a scanning marking method in which a laser beam is directly irradiated and marked on an object, a mask type marking method in which a pattern such as a desired character or figure is formed in advance on a mask, and a laser beam transmitted through the mask is used to mark the object .

Such laser marking is used in high-grade marking and sculpting such as various semiconductors, ICs, tools, and nameplates.

However, the conventional laser marking apparatus irradiates the marking object with the laser beam emitted from the laser generating unit from which the laser is output, and thus marks the object to be marked, so that it takes a considerable amount of time to mark the object.

Therefore, research for reducing the marking time in black marking on a marking object such as a metal is required.

Korean Registered Patent No. 10-0738872 (2007.12.12 Announcement)

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a marking system using an optical fiber laser, which can provide sharp marking in black marking of letters, drawings, pictures, and the like on a marking object and shorten a marking time.

According to an aspect of the present invention, there is provided a laser processing apparatus comprising: a laser generating unit for generating a fiber laser; And a scan head that receives an optical fiber laser from the laser generation unit through an optical fiber and focuses the optical fiber laser and marks the shape of the object to be marked by irradiating the laser beam onto an object to be marked, ; A beam focusing unit detachably coupled to the main body and configured to focus an optical fiber laser transmitted from the laser generating unit; And a scanner unit which is provided in the main body and irradiates the optical fiber laser focused by the beam focusing unit to the marking object, can be provided

Wherein the main body portion comprises: a straight pipe forming a path through which the optical fiber laser passes; A mounting groove portion which is provided at one side of the linear conduit and on which the beam focusing unit is mounted; And a support member which is provided to be opposed to the mounting groove portion and which mounts and fixes the beam focusing unit and detaches the beam focusing unit from the mounting groove portion when the beam focusing unit is lifted and lowered.

The beam focusing unit includes: a housing that is seated on the support; A convex lens which is contained in the housing and is arranged on one side of the optical fiber laser inlet to house an optical fiber laser; And a concave lens that is contained in the housing and transmits the optical fiber laser focused through the convex lens as parallel light to the scanner unit.

Wherein the beam focusing unit includes a lens for changing a position of at least one of the convex lens and the concave lens so as to adjust the cross sectional area of parallel light irradiated from the concave lens by adjusting a relative distance between the convex lens and the concave lens, And may further include a position adjusting section.

Wherein the beam focusing unit includes a beam splitter which is contained in the housing and which is disposed adjacent to the concave lens and which prevents parallel light emitted through the concave lens from being transmitted to the scanner unit and reflected in the direction of the concave lens isolator.

The housing may be formed in a hollow circular tube shape, and the support may include: a seating part having a circular arc shape corresponding to the shape of the housing so that the housing is seated; And a support member connected to the seating portion to support the seating portion.

The scanner unit may include an X-axis scan mirror and a Y-axis scan mirror, which are coupled to the main body and reflect the focused optical fiber laser in the beam focusing unit to irradiate the object to be marked.

The scanner unit may further include a focusing lens coupled to the main body and focusing the optical fiber laser reflected by the X-axis scan mirror and the Y-axis scan mirror to the marking object.

Further comprising a control unit for controlling the laser generation unit and the scan head to mark the shape of the object to be marked, wherein the control unit comprises: a storage module for receiving and storing shape information to be marked on the marking object; And a control module for controlling the laser generation unit and the scan head based on the shape information stored in the storage module.

The embodiment of the present invention increases the energy density of the optical fiber laser irradiated on the marking object by focusing the optical fiber laser delivered from the laser generating unit and transmitting the focused optical fiber to the scan head to mark the shape of the marking object, It is possible to provide clear marking at the time of marking and to shorten the marking time.

1 is a structural view showing a marking system using an optical fiber laser according to an embodiment of the present invention.
2 is a view illustrating a scan head according to an embodiment of the present invention.
3 is a view showing a mounting state of the beam focusing unit according to an embodiment of the present invention.
4 is a cross-sectional structural view showing a beam focusing unit according to an embodiment of the present invention.

In order to fully understand the present invention, operational advantages of the present invention, and objects achieved by the practice of the present invention, reference should be made to the accompanying drawings and the accompanying drawings which illustrate preferred embodiments of the present invention.

Hereinafter, the present invention will be described in detail with reference to the preferred embodiments of the present invention with reference to the accompanying drawings. Like reference symbols in the drawings denote like elements.

The object to be marked M according to the present embodiment includes a metal plate, a nameplate, a tool, a semiconductor, and the like. Hereinafter, a case where the object to be marked M is a metal plate will be described.

FIG. 1 is a structural view illustrating a marking system using an optical fiber laser according to an embodiment of the present invention, FIG. 2 is a view illustrating a scan head according to an embodiment of the present invention, FIG. 3 is a cross- FIG. 4 is a cross-sectional view illustrating a beam focusing unit according to an embodiment of the present invention. Referring to FIG.

1, the optical fiber 210 from the laser beam generating unit 200, the laser generation unit 200 of marking system 100 using a fiber laser, generates an optical fiber laser in accordance with one embodiment of the present invention A scan head 300 to which an optical fiber laser is delivered and which focuses the optical fiber laser and irradiates the object M to be marked to mark the shape of the object M to be marked, 200 and a control unit 400 for controlling the scan head 300.

In this embodiment, the laser generation unit 200 generates and emits a fiber laser according to the laser beam control signal output from the control unit 400. [ That is, the laser generating unit 200 generates and emits a fiber laser of different intensity by adjusting the on / off time and the beam intensity by the laser beam control signal output from the control unit 400.

The optical fiber laser used in this embodiment can reduce the power consumption compared to the gas laser such as the conventional CO 2 laser, and can cut and process even at low power. The operation waiting time There is an advantage that power consumption can be reduced.

Since the quality of the beam is good, the optical fiber laser is advantageous in that it can improve the processing speed and accuracy because of its excellent size and depth of focus.

In addition, since the optical fiber laser can be transmitted to the scan head 300 through the optical fiber 210, it is not necessary to use optical devices such as a plurality of optical mirrors to transmit the beam to the scan head 300 as in the conventional gas laser There is an advantage of cost reduction.

The optical fiber laser generated in the laser generating unit 200 is transmitted to the scan head 300 through the optical fiber 210.

Referring to FIGS. 2 and 3, the scan head 300 according to the present embodiment performs a role of first focusing the delivered optical fiber laser and irradiating the laser beam onto the object to be marked M, thereby black marking the object to be marked M do.

For example, when the object to be marked M is a metal, an optical fiber laser is irradiated to the surface of the metal plate and a desired shape is black-marked on the surface of the metal plate by the heat of the optical fiber laser.

The scan head 300 according to the present embodiment includes a main body 310 forming a movement path of the optical fiber laser transmitted from the laser generation unit 200, A beam condensing unit 330 for condensing the optical fiber laser transmitted from the beam splitter unit 200 and a scanner unit 330 for irradiating the optical fiber laser focused by the beam focusing unit 330 on the marked object M 350).

The main body 310 functions to form a path through which the optical fiber laser passes.

The main body 310 according to the present embodiment includes a straight line 311 forming a path through which the optical fiber laser passes.

An optical fiber 210 to which an optical fiber laser is incident is connected to one end of the linear conduit 311, and a scanner unit 350 is connected to the other end.

The main body 310 further includes a mounting groove 313 on one side of the straight pipe 311 on which a beam focusing unit 330 for holding an optical fiber laser is mounted.

The optical fiber laser is converged by the beam focusing unit 330 and transmitted to the scan head 300 while passing through the straight line 311. In this embodiment, the straight line 311 is provided with the mounting groove 313, And the beam focusing unit 330 is detachably coupled to the mounting groove portion 313.

The main body 310 further includes a support body 315 for supporting the beam focusing unit 330 so that the beam focusing unit 330 is attached to and detached from the mounting groove 313 formed in the straight line 311. In this embodiment, do.

The supporting body 315 is opposed to the mounting groove 313 and the beam focusing unit 330 is seated and the beam focusing unit 330 is lifted and raised to detachably connect the beam focusing unit 330 to the mounting groove 313 .

Specifically, the support 315 is provided at a lower portion of the mounting groove 313, and is lifted up in the height direction in a state where the beam focusing unit 330 is seated on the upper surface, so that the beam focusing unit 330 is mounted on the mounting groove 313 And is lowered in the height direction so that the beam focusing unit 330 is inserted into the mounting groove portion 313 to be released.

As shown in FIG. 3, the support 315 has a circular arc-shaped cross section corresponding to the shape of the hollow beam-shaped beam-collecting unit 330, And at least one supporting member 319 connected to a lower portion of the seating portion 317 to support the seating portion 317. [ The support 315 may further include a lift unit (not shown) connected to at least one support member 319 to lift the support member 319.

Meanwhile, in this embodiment, the optical fiber laser transmitted from the laser generation unit 200 is focused and transmitted to the scanner unit 350, thereby increasing the energy density per unit area of the optical fiber laser.

To this end, the beam focusing unit 330 according to the present embodiment is configured such that one side is connected to the laser generation unit 200 and the other side is connected to the scanner unit 350 to focus the optical fiber laser introduced through the straight pipeline 311 To the scanner unit 350.

4, the beam focusing unit 330 includes a housing 331 that is seated on a support 315, a housing 331 that is disposed in the housing 331 and is disposed on one side of the fiber- A convex lens 333 and a concave lens 335 which is contained in the housing 331 and transmits the optical fiber laser focused through the convex lens 333 as parallel light to the scanner unit 350, An isolator 333 which is disposed adjacent to the concave lens 335 and prevents the parallel light emitted through the concave lens 335 from traveling to the scanner unit 350 and from being reflected in the direction of the concave lens 335, 337).

The housing 331 is formed in a hollow circular tube shape to form an outer appearance of the beam focusing unit 330 and a convex lens 333, a concave lens 335 and a light isolator 337 are inserted into the housing 331.

A convex lens 333, a concave lens 335 and a light isolator 337 are sequentially arranged inside the housing 331. The optical fiber laser is converged while passing through the convex lens 333, Passes through the concave lens 335, becomes parallel light, and is transmitted to the scanner unit 350 via the optical isolator 337.

Specifically, in this embodiment, a convex lens 333 is disposed in order to primarily focus an optical fiber laser incident on the beam focusing unit 330. This is to increase the energy density of the optical fiber laser per unit area. The condensed optical fiber laser passes through the concave lens 335 and becomes parallel light and is transmitted to the scanner unit 350.

For example, in a state in which other conditions are the same, a case of general black marking without using a beam focusing unit and a case of black marking using a beam focusing unit according to the present invention are compared. In the former case, it takes 1 minute 49 seconds, and in the latter case it takes 45 seconds. Therefore, according to the present invention, time required for black marking can be remarkably reduced and productivity can be remarkably improved.

On the other hand, the optical fiber laser that has passed through the concave lens 335 passes again through the optical isolator 337. This is because when the optical fiber laser transmitted to the scanner unit 350 is reflected and reentered in the direction of the concave lens 335, This is to prevent the laser output, that is, the energy density, from being lowered.

The beam focusing unit 330 according to the present embodiment may further include a lens position adjusting unit that can adjust the relative distance between the convex lens 333 and the concave lens 335. [

That is, the lens position adjusting unit is connected to at least one of the convex lens 333 and the concave lens 335 to adjust the relative distance between the convex lens 333 and the concave lens 335. This is to adjust the relative distance between the convex lens 333 and the concave lens 335 to adjust the cross-sectional area of the parallel light emitted from the concave lens 335 to control the energy density per unit area of the optical fiber laser.

As described above, the beam focusing unit 330 focuses the optical fiber laser, and the focused optical fiber laser is transmitted to the scanner unit 350 and irradiated to the marking object M to black mark the desired shape of the object M to be marked.

1, the scanner unit 350 according to the present embodiment is coupled to the body 310 and reflects an optical fiber laser focused by the beam focusing unit 330 to irradiate the object M to be marked The X-axis scan mirror 351 and the Y-axis scan mirror 353 and the optical fiber laser coupled to the main body 310 and reflected by the X-axis scan mirror 351 and the Y-axis scan mirror 353, M).

The focused optical fiber laser incident on the scanner unit 350 is reflected by the X-axis scan mirror 351 and the Y-axis scan mirror 353 to a position corresponding to the shape to be formed on the object to be marked M and is irradiated.

At this time, the converged optical fiber laser reflected by the X-axis scan mirror 351 and the Y-axis scan mirror 353 is again focused again through the focusing lens 355.

As described above, the energy density of the optical fiber laser can be further increased by focusing the optical fiber laser again.

On the other hand, the series of operations of the above-described scan head 300 is controlled by the control unit 400. [

The control unit 400 according to the present embodiment is connected to the laser generation unit 200 and the scan head 300 so that the laser generation unit 200 and the scan head 300 can be made of the material of the marked object M, And generates a control signal for controlling the laser generation unit 200 and the scan head 300 according to the shape to be formed on the scan electrode M.

The control unit 400 includes a storage module 410 for receiving and storing shape information to be marked on the object M to be marked, a laser generation unit 200 for generating the shape information based on the shape information stored in the storage module 410, And a control module 430 for controlling the scan head 300.

The control module 430 generates control signals for the laser generation unit 200 and the scan head 300 based on the shape information to be marked on the marked object M stored in the storage module 410, (200) and the scan head (300) to obtain a desired shape.

The control signal includes the irradiation time interval of the optical fiber laser, the intensity of the optical fiber laser, the frequency of the optical fiber laser, the duty, the waiting time and the stopping time before the laser operation, and the duty.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention. Accordingly, such modifications or variations are intended to fall within the scope of the appended claims.

100: marking system 200: laser generating unit
300: scan head 310:
311: straight pipe 313: mounting groove
315: Support body 317:
319: Support member 330: Beam focusing unit
331: housing 333: convex lens
335: concave lens 337: optical isolator
350: scanner unit 351: X-axis scan mirror
353: Y-axis scan mirror 355: focusing lens
400: control unit 410: storage module
430: Control module

Claims (9)

A laser generating unit for generating a fiber laser; And
And a scan head which receives an optical fiber laser from the laser generation unit through an optical fiber, focuses the optical fiber laser, and irradiates the optical fiber laser to mark the shape of the object to be marked,
The scan head includes:
A main body part forming a path of the optical fiber laser;
A beam focusing unit detachably coupled to the main body and configured to focus an optical fiber laser transmitted from the laser generating unit; And
And a scanner unit which is provided in the main body and irradiates the optical fiber laser focused by the beam focusing unit to the marking object. The method according to claim 1,
Wherein,
A straight pipe forming a path through which the optical fiber laser passes;
A mounting groove portion which is provided at one side of the linear conduit and on which the beam focusing unit is mounted; And
And a support body which is provided to be opposed to the mounting groove portion and allows the beam focusing unit to be attached to and detached from the mounting groove portion as the beam focusing unit is seated and lifted and lowered. 3. The method of claim 2,
The beam focusing unit includes:
A housing that is seated on the support;
A convex lens which is contained in the housing and is arranged on one side of the optical fiber laser inlet to house an optical fiber laser; And
And a concave lens that is contained in the housing and transmits the optical fiber laser focused through the convex lens as parallel light to the scanner unit. The method of claim 3,
The beam focusing unit includes:
Further comprising a lens position adjuster for adjusting a relative distance between the convex lens and the concave lens so as to change a position of at least one of the convex lens and the concave lens so as to adjust a cross sectional area of parallel light emitted from the concave lens Marking system using fiber laser. The method of claim 3,
The beam focusing unit includes:
And an optical isolator disposed in the housing and disposed adjacent to the concave lens for preventing parallel light irradiated through the concave lens from propagating to the scanner unit and reflecting in the direction of the concave lens Marking system using fiber laser. The method of claim 3,
The housing is formed in a hollow circular tube shape,
Wherein the support comprises:
A seating part having an arc shape in cross section corresponding to the shape of the housing so that the housing is seated; And
And a support member connected to the seating portion to support the seating portion. The method according to claim 1,
The scanner unit includes:
And an X-axis scan mirror and a Y-axis scan mirror, which are coupled to the main body and reflect the focused optical fiber laser in the beam focusing unit and irradiate the optical fiber to the marking object. 8. The method of claim 7,
The scanner unit includes:
And a focusing lens coupled to the main body and configured to focus the optical fiber laser reflected by the X-axis scan mirror and the Y-axis scan mirror to the marking object. The method according to claim 1,
Further comprising a control unit for controlling the laser generation unit and the scan head to mark the shape of the object to be marked,
The control unit includes:
A storage module for receiving and storing shape information to be marked on the marking object; And
And a control module for controlling the laser generation unit and the scan head based on the shape information stored in the storage module.
KR1020150048164A 2015-04-06 2015-04-06 Marking system using fiber laser KR101724194B1 (en)

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Publication number Priority date Publication date Assignee Title
KR102030686B1 (en) * 2018-04-19 2019-11-08 고려대학교 산학협력단 Automation device for generating collimated laser beam
KR102134175B1 (en) 2019-09-06 2020-07-15 주식회사 에스케이엘시스템 Laser marking device of real time checking type

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100738872B1 (en) 2006-01-31 2007-07-12 (주)에스엠텍 Laser marking apparatus
WO2008053915A1 (en) * 2006-11-02 2008-05-08 Nabtesco Corporation Scanner optical system, laser processing device, and scanner optical device
JP2008194751A (en) * 2007-01-15 2008-08-28 Sumitomo Electric Ind Ltd Laser processing apparatus
JP2012091191A (en) * 2010-10-26 2012-05-17 Panasonic Electric Works Sunx Co Ltd Laser beam machining apparatus

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100738872B1 (en) 2006-01-31 2007-07-12 (주)에스엠텍 Laser marking apparatus
WO2008053915A1 (en) * 2006-11-02 2008-05-08 Nabtesco Corporation Scanner optical system, laser processing device, and scanner optical device
JP2008194751A (en) * 2007-01-15 2008-08-28 Sumitomo Electric Ind Ltd Laser processing apparatus
JP2012091191A (en) * 2010-10-26 2012-05-17 Panasonic Electric Works Sunx Co Ltd Laser beam machining apparatus

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