KR101854654B1 - Laser beam dumper - Google Patents

Abstract

The present invention relates to a laser beam damper, and more particularly, to a laser beam damper which comprises an absorber formed of a carbon (C) material to absorb energy of a laser beam and emit heat as heat, In addition, the laser absorption plate can be replaced only when the laser is damaged by the laser, and the energy absorption rate of the laser beam can be improved. It is effective.

Description

LASER BEAM DUMPER [0002]

The present invention relates to a laser beam damper, and more particularly, to a laser beam damper that absorbs energy emitted to a place other than an object to be processed during operations such as cutting and hole processing using a high output laser.

A laser means that light is amplified and emitted repeatedly in the amplifier. In the case of an industrial laser, there is a problem that harmful objects and human bodies may be generated due to the exposure of dangerous energy because the laser beam having a high energy density is emitted at a high pressure.

Therefore, in the processing using the output laser (cutting, piercing, etc.), there is a laser output which does not fit the object to be processed in the ready state, or a device that blocks the laser output which is not consumed by the processing, . In general, refractory bricks are used to block these outputs. When a high-power laser of several to several kW is used for processing, refractory bricks which can not withstand high output heat are continuously consumed. Therefore, since the refractory bricks are consumed as much as the number of times of processing, the maintenance cost is also high, and there is a concern that the refractory bricks may penetrate when the high power laser is continuously irradiated.

Meanwhile, FIG. 1 shows a photograph of a conventional laser sensor (source: Ophir's homepage, www.ophiropt.com). As shown in FIG. 1, a laser damper is also provided to prevent laser beam damage. In this case, a commercial water-cooled laser beam damper 1 may be utilized without using a refractory brick. However, since the conventional laser beam damper is formed of a metal material and is manufactured through a special process in order to increase the durability, heat resistance and thermal conductivity, it is expensive, and since it is difficult to manufacture a large area due to high manufacturing cost, The area of the center is small. Therefore, it can not be applied to the field during processing. Also, it can be contaminated with dust generated during processing. In this case, it is difficult to continuously use the beam damper.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a laser beam damper which is capable of irradiating a laser beam over a large area and has improved durability, in order to overcome the problems of the conventional laser beam damper.

According to an aspect of the present invention, there is provided a laser beam damper comprising: an absorber formed of a carbon (C) material to absorb energy of a laser beam and emit heat as heat; And a cooling support portion provided to cool and support the absorption portion.

It is also possible to further include a heat transfer part for transferring the heat radiated from the absorption part to the cooling support part.

In this case, the absorber may include a laser absorption plate configured to absorb energy of the laser, and a plate holder configured to receive the laser absorption plate and coupled to the cooling support.

The absorber may further include a coupling cover configured to couple the cooling support and the plate holder.

Meanwhile, the cooling support portion may be formed with a cooling channel so that cooling water for cooling the heat introduced from the absorption portion flows.

At this time, the cooling channel may be formed in a groove shape opened toward the absorption part.

The cooling support portion may include a cooling water inlet formed to receive the cooling water and a cooling water outlet formed to exhaust the heat absorbed cooling water. The cooling water inlet and the cooling water outlet may be formed to communicate with the cooling channel.

The cooling support portion may further include a water leakage preventing ring formed in contact with the heat transfer portion and disposed outside the cooling passage so as to prevent leakage of the cooling water.

The heat transfer part may be formed of a copper-based material.

The cooling support portion and the heat transfer portion may be welded to each other.

On the other hand, the laser absorbing plate may be formed of a graphite material.

Also, the coupling cover, the heat transfer part, and the cooling support part may be bolted to be detachable from each other.

It is also possible that a thermally conductive grease is applied between the absorbing portion and the heat transfer portion.

As described above, according to the laser beam damper of the present invention, it is possible to increase the area where the laser can be incident so as to be applicable at the work site, and to replace only the laser absorbing plate upon breakage by the laser, It has the effect of improving the energy absorption rate and releasing it quickly.

Figure 1 is a photograph of a conventional laser beam damper,
2 is an exploded perspective view of a laser beam damper according to an embodiment of the present invention,
3 is a perspective view of a laser beam damper according to an embodiment of the present invention,
4 is a perspective view of the plate holder,
Figure 5 is a perspective view of the mating cover,
Figure 6 is a perspective view of the cooling support,
7 is a front view of the cooling section.

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

2 and 3, a laser beam damper according to an embodiment of the present invention includes an absorption part 100, a heat transfer part 200, and a cooling support part 300. At this time, the heat transfer part 200 is disposed between the absorption part 100 and the cooling support part 300.

The absorber 100 includes a laser absorption plate 110, a plate holder 130, and a coupling cover 150. At this time, the outer periphery of the laser absorption plate 110 is formed so as to surround the plate holder 130, and the coupling cover 150 is detachably coupled in the incident direction of the laser.

In this embodiment, the laser absorption plate 110 may be made of a carbon (C) based material, and preferably a graphite material is used. Also, in this embodiment, the laser absorption plate 110 may apply various surface colors, but it is preferable that the surface color is applied to black (black).

4, the plate holder 130 is in the form of a plate having a receiving hole 131 corresponding to the shape of the laser absorbing plate 110 so that the laser absorbing plate 110 is seated in the plate holder 130, And is detachably coupled to the coupling cover 150, the heat transfer unit 200, and the cooling support unit 300.

5, the coupling cover 150 is formed in correspondence with the shape of the plate holder 130, and includes an outer end portion of the laser absorbing plate 110 and an inner end portion of the plate holder 130 And is formed to have a larger cross-sectional area than the plate holder 130. That is, the coupling cover 150 is formed with an incidence hole 151 so that the laser absorption plate 110 is exposed in the incidence direction of the laser.

The coupling cover 150 is detachably coupled to the plate holder 130, the heat transfer unit 200, and the cooling support unit 300.

Therefore, the absorber 100 is arranged so that the outer end of the laser absorption plate 110 is in contact with the inner wall surface of the plate holder 130, and the laser absorption plate 110 and the plate holder 130 And the coupling cover 150 covers the laser incident direction surface.

Referring to FIG. 2, the heat transfer part 200 is formed of various materials having thermal conductivity, and is preferably formed of a copper (Cu) -based material. One side (laser incident side) of the heat transfer part 200 is in contact with the absorption part 100 and the other side is in contact with the cooling support part 300. At this time, a thermal grease (not shown in the drawing) is applied to the surface of the heat transfer part 200 in the laser incident direction and contacted with the laser absorption plate 110. That is, the gap that can be generated between the laser absorption plate 110 and the heat transfer part 200 is filled with the thermally conductive grease.

Referring to FIG. 6, the cooling support 300 includes a cooling part 310 and a support part 330. At this time, the support part 330 is formed in the form of a plate contacting the ground, and the cooling part 310 is coupled in a direction crossing the support part 330.

7, the cooling unit 310 includes a cooling channel 311, a cooling water inlet 313, a cooling water outlet 315, and a water leakage prevention ring 317. [ The cooling unit 310 is formed in the shape of a plate having a predetermined thickness and the cooling channel 311 is formed in the shape of a groove on a surface (laser incident surface) in the direction of the heat transfer unit 200. At this time, the cooling channel 311 is formed to communicate the cooling water inlet 313 and the cooling water outlet 315, and a straight channel and a U-shaped channel are repeated to form an ' Thereby forming a repeated flow path. The cooling water inlet 313 and the cooling water outlet 315 are connected to an external cooling water inflow device or the like. At this time, in this embodiment, the cooling water inlet 313 is positioned on the upper side of the cooling part 310 so that the cooling water flows faster by the gravity, and the cooling water outlet 315 is positioned on the upper side of the cooling part 310 But the present invention is not limited thereto.

Meanwhile, the cooling unit 310 is coupled with the leakage preventing ring 317 in the direction of the heat transfer unit 200. At this time, the water leakage preventing ring 317 is arranged to surround the outer circumference of the cooling passage 311 and is in contact with the heat transfer part 200. That is, the cooling unit 310 is connected to the heat transfer unit 200 through the leakage preventing ring 317 without clearance.

2 and 3, the function and effect of the laser beam damper according to the embodiment of the present invention will be described. When the laser beam damper is operated by the laser beam, .

When the laser beam is generated in this state, the laser beam is incident on the laser absorbing plate 110 of the absorber 100 when the laser beam is not applied to the object or when the laser beam passes through the object to be processed.

At this time, the black laser absorbing plate 110 formed of a graphite material or the like absorbs the high energizing energy of the laser as in the present embodiment. In the case of black, there is a property of absorbing the waves of all regions without reflected wavelength (Blackbody Radiation), so that it can absorb the light energy of the wave form emitted from the laser as much as possible. In addition, carbon (C) materials such as graphite are resistant to abrasion resistance, durability and heat resistance, and have excellent thermal conductivity. Therefore, it is not damaged by the high energetic energy emitted from the laser (durability and heat resistance), absorbs it, converts it into thermal energy, and simultaneously discharges heat (thermal conductivity) by heat. This is superior in durability and thermal conductivity as compared with conventional metal-based materials.

In addition, the carbon material such as graphite has excellent processability such as thickness control, and it is easy to manufacture the laser absorbing plate 110 having a large area. Accordingly, since the laser absorbing plate 110 having a large area can be manufactured as compared with the area that can be cut by the conventional metal-based damper, the laser beam is scattered and refracted due to laser scattering which may occur when a high- It is possible to prevent exposure to the outside beyond the blocking range.

Also, in this embodiment, a heat conductive grease is applied between the laser absorbing plate 110 and the heat transfer portion 200, and the heat transfer portion 200 is formed of a copper (Cu) based material having excellent thermal conductivity, And continuously emits heat energy coming from the laser absorbing plate 110.

The cooling passage 311 is formed in the cooling part 310 so that the cooling water flows through the cooling passage 311 and is directly contacted with the heat transfer part 200, To cool it. In order to maximize the cooling efficiency of the cooling channel 311, the cooling channel 311 is formed in a continuous " d " shape in order to maximize the contact area with the heat transfer part 200 and circulate the cooling water quickly . In this embodiment, the leakage preventing ring 317 is introduced to supplement the disadvantage that the cooling passage 311 is opened to the outside so that the cooling water directly contacts the heat transfer part 200, Respectively.

In the present embodiment, the plate holder 130 and the coupling cover 150 are bolted to the heat transfer part 200 and the cooling support part 300 so that the laser absorption plate 110 If damaged, it can be easily replaced.

Therefore, the laser beam damper according to an embodiment of the present invention absorbs the energy of the laser beam through the laser absorbing plate 110 formed of a graphite material of black to a maximum extent, and the thermal energy is transmitted to the heat conductive part 200 And is continuously discharged through the cooling water flowing through the cooling channel 311 to prevent damage to the body or an object due to reflection of high concentration energies and to reduce breakage of the damper, The laser absorbing plate can be replaced.

Meanwhile, in the laser beam damper according to another embodiment of the present invention, the cooling support part 300 and the heat transfer part 200 are welded together and integrally joined. In this case, since there is no gap between the cooling support part 300 and the heat transfer part 200, it is possible to prevent the cooling water flowing along the cooling flow path 311 from leaking.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It is obvious that the modification or the modification is possible by the person.

 It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

100: absorption part
110: laser absorption plate
130: plate holder
150: coupling cover
200: heat transfer part
300: cooling support
310:
311:
313: Cooling water inlet
315: Cooling water outlet
317: Waterproof ring
330: Support

Claims (13)

An absorber formed of a carbon (C) material so as to absorb the energy of the laser beam and emit it as heat;
A cooling support portion for cooling the heat emitted from the absorption portion and supporting the absorption portion; And
A heat transfer unit configured to transfer heat from the absorber to the cooling support unit;
Lt; / RTI >
The absorber may comprise:
A laser absorbing plate formed in a flat plate shape to absorb energy of the laser;
A plate holder formed to surround an outer periphery of the laser absorbing plate and adapted to engage with the cooling support; And
And a coupling cover which is formed corresponding to the shape of the plate holder and which is detachable in a laser incident direction so as to couple the cooling support portion and the plate holder, ≪ / RTI >
The heat-
And a laser beam damper provided in a plate form and stacked between the laser absorbing plate and the cooling support.
delete delete delete The method according to claim 1,
The cooling support portion
And a cooling channel is formed so that cooling water for cooling the heat introduced from the absorber flows.
6. The method of claim 5,
The cooling channel
Wherein the laser beam damper is formed in a groove shape opened in the direction of the absorbing portion.
6. The method of claim 5,
The cooling support portion
A cooling water inlet formed to introduce cooling water; And
A cooling water outlet formed to discharge cooling water that absorbs heat;
Lt; / RTI >
And the cooling water inlet and the cooling water outlet are communicated with the cooling passage.
6. The method of claim 5,
The cooling support portion
A leakage preventing ring which is brought into contact with the heat transfer part and is arranged at an outer periphery of the cooling passage so as to prevent leakage of cooling water;
≪ / RTI > further comprising a laser beam damper.
The method according to claim 1,
The heat-
Wherein the laser beam damper is formed of a copper-based material.
The method according to claim 1,
And the cooling support portion and the heat transfer portion are welded to each other.
The method according to claim 1,
Wherein the laser absorption plate
Wherein the laser beam damper is formed of a graphite material.
The method according to claim 1,
Wherein the coupling cover, the heat transfer portion, and the cooling support portion are bolted to each other so as to be detachable from each other.
The method according to claim 1,
And a thermally conductive grease is applied between the absorbing portion and the heat transfer portion.

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