JPH0952188A - Laser beam irradiating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a laser beam irradiating device efficiently softening a hardened region of member by irradiating a member with laser beam from plural laser beam torches so as to improve a moving speed of running truck. SOLUTION: A permanent magnet 1c is attracted at a prescribed position on the surface of a member 4 so that a cladding by welding layer formed on the surface of member 4 is positioned right under between both rails and both rails 1 are laid parallel each other. Further, A running truck 2 is placed on the rail 1 so that a wheel 2a rolls on the upper face of flange part 1a of rail 1 and a condensing lens 6a of first laser beam torch 6 and condensing lens 7a of second laser beam torch 7 are facing to one end part of the cladding by welding layer formed on the surface of member 4. Next, a laser beam oscillator is operated, the cladding by welding layer formed on the surface of member 4 and its neighborhood are irradiated with laser beams 8, 8 emitted from the condensing lenses 6a, 7a and the hardened region of member 4 is softened. Softening of hardened region is successively executed with moving the running truck 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a laser irradiation apparatus suitable for a laser cladding method or a laser tempering method.

[0002]

2. Description of the Related Art Conventionally, a laser clad method is used as a means for forming a linear buildup layer on the surface of a member made of carbon steel or low alloy steel.

Further, a laser temper method is used as a means for softening a hardened region of a member which has been sensitized by the effect of local heating when forming a buildup layer by the laser clad method.

FIGS. 6 and 7 show an example of a laser irradiation apparatus used in the laser clad construction method and the laser temper construction method. The laser irradiation apparatus is a pair of rails 1 and a self-moving apparatus guided by the rails 1. A traveling type traveling vehicle 2 and a laser torch 3 attached to the traveling vehicle 2 are provided.

The rail 1 is formed by arranging an angle member such that its flange portion 1a faces laterally and the other flange portion 1b faces upward, and the lower surface of one flange portion 1a should be repaired. A permanent magnet 1c for fixing the rail 1 to the member 4 is attached via a stay 1d.

The traveling vehicle 2 has a wheel body 2b having wheels 2a rolling on the upper surface of one flange portion 1a of the rail 1.
And a drive source 2c such as a motor which is installed inside the traveling vehicle main body 2b and rotates the wheels 2a.

The laser torch 3 has a torch body 3b having a condenser lens 3a and a hanger 3c for suspending and supporting the torch body 3b on the traveling vehicle body 2b so that the condenser lens 3a faces downward.

An optical fiber 3 is attached to the torch body 3b.
A laser oscillator (not shown) is connected via d, and laser light oscillated from the laser oscillator enters the condenser lens 3a through the optical fiber 3d, and the condenser lens 3a
The laser beam 5 focused by a is emitted toward the outside of the torch body 3b.

The operation of the laser irradiation apparatus shown in FIGS. 6 and 7 will be described below.

When the linear buildup layer is formed on the surface of the member 4 by the laser clad method, the portion of the member 4 where the buildup layer is to be formed is located immediately below both rails 1. The permanent magnet 1c is attracted to a predetermined position on the surface of the member 4 so that both rails 1 are juxtaposed, and the portion of the member 4 where the build-up layer is to be formed depends on the metal component of the member 4. A paste (not shown) containing metal powder is applied.

Further, the wheel 2a is the flange portion 1 of the rail 1.
The traveling vehicle 2 is mounted on the rail 1 so that the upper surface of a can be rolled and the condensing lens 3a of the laser torch 3 faces one end of the paste applied to the member 4.

Then, when the laser oscillator is operated, the paste applied to the member 4 is irradiated with the laser beam 5 emitted from the condenser lens 3a, and the metal powder contained in the paste is melted.

Further, when the drive source 2c is operated so that the traveling vehicle 2 moves toward the other end of the paste applied to the member 4, the traveling vehicle 2 moves so that the irradiation position of the laser beam 5 on the paste is the paste. Of the metal powder contained in the paste are sequentially melted and solidified to form a linear buildup layer (not shown) on the member 4
Formed on the surface of.

On the other hand, when the hardening region of the member 4 caused by the local heating by the laser cladding method is softened by the laser tempering method, the built-up layer formed on the surface of the member 4 is between the rails 1. The permanent magnet 1c is attracted to a predetermined position on the surface of the member 4 so as to be positioned immediately below and both rails 1 are parallel to each other.

Further, the wheel 2a is the flange portion 1 of the rail 1.
The traveling vehicle 2 is mounted on the rail 1 so as to be able to roll on the upper surface of a and the condensing lens 3a of the laser torch 3 faces one end of the buildup layer formed on the surface of the member 4.

In this state, a laser beam having a light intensity suitable for softening the hardened region of the member 4 without melting the build-up layer (light intensity lower than when forming the build-up layer) is oscillated. When the laser oscillator is operated in this manner, the laser beam 5 emitted from the condenser lens 3a is applied to the built-up layer formed on the surface of the member 4 and its vicinity, and the hardening region of the member 4 is softened.

Further, a speed suitable for softening the hardened region of the member 4 (speed lower than that for forming the buildup layer)
When the drive source 2c is operated so that the traveling vehicle 2 moves toward the other end of the linear buildup layer formed on the surface of the member 4, the traveling vehicle 2 moves to cause the laser beam to be applied to the buildup layer. The irradiation position of 5 is displaced toward the other end of the overlay layer,
The built-up layer and the hardening region of the member 4 are sequentially softened.

[0018]

However, in the laser irradiation apparatus shown in FIGS. 6 and 7, the moving speed of the laser beam 5 when carrying out the laser tempering method is the same as that when carrying out the laser cladding method. Since it is a fraction of the moving speed of No. 5, it was not possible to efficiently perform the softening of the hardened region as compared with the formation of the buildup layer.

The present invention has been made in view of the above-mentioned circumstances, and an object thereof is to provide a laser irradiation apparatus which can easily soften a hardened area after applying a laser glad method.

[0020]

To achieve the above object, in a laser irradiation apparatus according to a first aspect of the present invention, a laser beam is arranged at a predetermined distance from the surface of a member to be irradiated with the laser beam. A rail capable of moving, a traveling vehicle that is guided and moved by the rail, and a plurality of laser torches provided on the traveling vehicle so as to emit laser beams toward the surface of the member, respectively. The respective laser torches are arranged so that the laser beam is incident on the surface of the member in series in the traveling direction of the traveling vehicle.

Further, in the laser irradiation apparatus according to the second aspect of the present invention, a rail that can be arranged at a predetermined distance from the surface of the member to be irradiated with the laser beam, and is guided by the rail. The vehicle includes a moving traveling vehicle, a laser torch provided on the traveling vehicle and emitting a laser beam toward the surface of the member, and a heater that can be arranged on the back surface of the member.

In the laser irradiation apparatus according to the first aspect of the present invention, when the traveling vehicle is guided and moved by the rail, the laser beam emitted from each of the plurality of laser torches toward the surface of the member strikes the surface of the member. The members are heated in succession by sequentially passing.

Further, in the laser irradiation apparatus according to the second aspect of the present invention, the laser beam emitted from the laser torch toward the front surface of the member and the heater arranged on the back surface side of the member heat the member.

[0024]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a first example of an embodiment of a laser irradiation apparatus of the present invention. In the figure, the parts denoted by the same reference numerals as those in FIGS. 6 and 7 represent the same things. .

In the laser irradiation apparatus shown in FIG. 1, a pair of rails 1, a self-propelled traveling vehicle 2 which is guided and moved by the rails 1, a first laser torch 6 attached to the traveling vehicle 2, and A laser irradiation device is constituted by the second laser torch 7.

The first laser torch 6 has a condenser lens 6a.
And a hanger 6c for suspending and supporting the torch body 6b at a portion near the front end of the traveling vehicle body 2b so that the condenser lens 6a faces downward.

An optical fiber 6 is attached to the torch body 6b.
A laser oscillator (not shown) is connected via d, and laser light oscillated from the laser oscillator enters the condenser lens 6a through the optical fiber 6d, and the condenser lens 6a
The laser beam 8 condensed by a is emitted toward the outside of the torch body 6b.

The second laser torch 7 has a condenser lens 7a.
And a hanger 7c for suspending and supporting the torch body 7b at a portion near the rear end of the traveling vehicle body 2b so that the condenser lens 7a faces downward.

An optical fiber 7 is attached to the torch body 7b.
A laser oscillator (not shown) is connected via d, and laser light oscillated from the laser oscillator enters the condenser lens 7a via the optical fiber 7d, and the condenser lens 7a
The laser beam 8 focused by a is emitted toward the outside of the torch body 7b.

Further, a shutter (not shown) is provided between the optical fiber 7d and the laser oscillator to block the incidence of laser light from the laser oscillator onto the optical fiber 7d.

The laser beams 8 and 8 emitted from the condenser lenses 6a and 7a are emitted from the condenser lens 3a of the conventional laser irradiating apparatus described above when the laser temper method is applied. It has a light intensity and a beam diameter equal to 5 (see FIG. 6).

The operation of the laser irradiation apparatus shown in FIG. 1 will be described below.

When the linear buildup layer is formed on the surface of the member 4 by the laser clad method, the portion of the member 4 where the buildup layer is to be formed is located immediately below both rails 1. The permanent magnet 1c is attracted to a predetermined position on the surface of the member 4 so that both rails 1 are juxtaposed, and the portion of the member 4 where the build-up layer is to be formed depends on the metal component of the member 4. A paste (not shown) containing metal powder is applied.

Further, the wheel 2a is the flange portion 1 of the rail 1.
The traveling vehicle 2 is mounted on the rail 1 so that the upper surface of a can be rolled and the condensing lens 3a of the laser torch 3 faces one end of the paste applied to the member 4.

Then, from the laser oscillator to the optical fiber 7d.
When the laser oscillator is activated after the laser light is blocked from entering the shutter by the shutter, the paste applied to the member 4 is irradiated with the laser beam 8 emitted from the condenser lens 6a, and the metal contained in the paste is irradiated. The powder melts.

Further, when the drive source 2c is operated so that the traveling vehicle 2 moves toward the other end of the paste applied to the member 4, the traveling position of the laser beam 8 on the paste is moved by the traveling vehicle 2 by moving the traveling vehicle 2. Of the metal powder contained in the paste are sequentially melted and solidified to form a linear buildup layer (not shown) on the member 4
Formed on the surface of.

When the hardening region of the member 4 caused by the effect of local heating by the laser cladding method is softened by the laser tempering method, the built-up layer (not shown) formed on the surface of the member 4 is used for both rails 1. Between the permanent magnets 1 so that both rails 1 are parallel to each other.
The c is attracted to a predetermined position on the surface of the member 4.

Further, the wheel 2a is the flange portion 1 of the rail 1.
a so that it can roll on the upper surface of a and the first laser torch 6
The traveling vehicle 2 is placed on the rail 1 so that the condensing lens 6a of the second laser torch 7 and the condensing lens 7a of the second laser torch 7 face one end of the build-up layer formed on the surface of the member 4.

Then, from the laser oscillator to the optical fiber 7d.
Set the shutter so that the laser light enters
When the laser oscillator is operated so as to oscillate a laser beam having a light intensity suitable for softening the hardened region of the member 4 (light intensity lower than that when forming the buildup layer), the condenser lenses 6a and 7a The emitted laser beams 8 and 8 irradiate the built-up layer formed on the surface of the member 4 and its vicinity, and the hardening region of the member 4 is softened.

Further, when the driving source 2c is operated so as to move toward the other end of the linear buildup layer formed on the surface of the member 4, the traveling vehicle 2 moves and the laser beam for the buildup layer is moved. The irradiation positions of 8 and 8 are displaced toward the other end portion of the buildup layer, and the hardened regions of the buildup layer and the member 4 are gradually softened.

At this time, the laser beams 8 and 8 emitted from the condenser lenses 6a and 7a are emitted when the laser tempering method is applied in the conventional laser irradiation apparatus described above. (See FIG. 6), the laser beam 8 has the same light intensity and beam diameter.
The moving speed of the traveling vehicle 2 for displacing 8 can be doubled as compared with the conventional laser irradiation device, and therefore, the hardening region of the member 4 can be efficiently softened.

FIGS. 2 and 3 show a second example of the embodiment of the laser irradiation apparatus of the present invention, in which FIG.
The parts denoted by the same reference numerals as those in FIGS. 6 and 7 represent the same things.

In the laser irradiation apparatus shown in FIGS. 2 and 3,
A pair of rails 1, a self-propelled traveling vehicle 2 that is guided and moved by the rails 1, a first laser torch 9, a second laser torch 10, and a third laser torch 11 attached to the traveling vehicle 2. A laser irradiation device is constituted by

The first laser torch 9 has a condenser lens 9a.
And a hanger 9c for suspending and supporting the torch body 9b at a portion near the front end of the traveling vehicle body 2b so that the condenser lens 9a faces downward.

An optical fiber 9 is attached to the torch body 9b.
A laser oscillator (not shown) is connected via d, and the laser light oscillated from the laser oscillator enters the condenser lens 9a through the optical fiber 9d, and the condenser lens 9a
The laser beam 12 focused by a is the torch body 9b.
The light is emitted toward the outside.

The second laser torch 10 includes a condenser lens 1
It has a torch body 10b having 0a, and a hanger 10c for suspending and supporting the torch body 10b at an intermediate portion in the front-rear direction of the traveling vehicle body 2b so that the condenser lens 10a faces downward.

A laser oscillator (not shown) is connected to the torch body 10b via an optical fiber 10d, and laser light oscillated from the laser oscillator passes through the optical fiber 10d to a condenser lens 10a. A laser beam 13 having an elongated elliptical beam cross section in the traveling direction of the traveling vehicle 2 that is incident and is condensed by the condenser lens 10a is emitted toward the outside of the torch body 10b.

The third laser torch 11 is a condenser lens 1
It has a torch body 11b having 1a and a hanger 11c for suspending and supporting the torch body 11b at a portion near the rear end of the traveling vehicle body 2b so that the condenser lens 11a faces downward.

A laser oscillator (not shown) is connected to the torch body 11b through an optical fiber 11d, and laser light oscillated from the laser oscillator passes through the optical fiber 11d and reaches a condenser lens 11a. A laser beam 13 having an elongated elliptical beam cross section in the traveling direction of the traveling vehicle 2 that is incident and is condensed by the condenser lens 11a is emitted toward the outside of the torch body 11b.

The laser beam 12 emitted from the condenser lens 9a is emitted from the condenser lens 3a of the conventional laser irradiation apparatus described above when the laser cladding method is applied (see FIG. 6). Are set to have the same light intensity and beam diameter.

Further, the laser beams 13 and 13 emitted from the condenser lenses 10a and 11a are emitted from the condenser lens 3a of the conventional laser irradiation device when the laser temper method is applied (see FIG. 6). (Refer to FIG. 3), and has the same light intensity.

Further, the beam diameters of the laser beams 13 and 13 and the laser beam 5 during the laser tempering method in the member incident positions in the extension direction of the build-up layer satisfy the relation of the following expression (1). It is like this.

## EQU1 ## a ₂ = (a ₁ × v ₂ ) / nv ₁ (1) n: number of laser beams 13 (n = 2 in the laser irradiation apparatus shown in FIGS. 2 and 3) a ₁ : conventional the laser beam 5 of the members the beam diameter of the extension direction of the built-up layers at the incident position a ₂ at the time of applying a laser temper method in the laser irradiation apparatus: when applying a laser temper method in the laser irradiation apparatus shown in FIGS. 2 and 3 Diameter of the laser beam 13 in the member incident position in the extension direction of the built-up layer v ₁ : moving speed of the laser beam 5 when the laser temper method is applied in the conventional laser irradiation apparatus v ₂ : in the conventional laser irradiation apparatus Moving speed of the laser beam 5 when constructing the laser clad method

The operation of the laser irradiation apparatus shown in FIGS. 2 and 3 will be described below.

When a linear buildup layer is formed on the surface of the member 4 by the laser cladding method and the hardening region of the member 4 caused by the effect of local heating by the laser cladding method is softened by the laser tempering method, The permanent magnet 1c is placed at a predetermined position on the surface of the member 4 so that the portion of the member 4 where the build-up layer is to be formed is located immediately below between the rails 1 and both rails 1 are arranged in parallel. And a paste (not shown) containing a metal powder corresponding to the metal component of the member 4 is applied to the portion of the member 4 where the build-up layer is to be formed.

Further, the wheel 2a is the flange portion 1 of the rail 1.
The traveling vehicle 2 is mounted on the rail 1 so that the upper surface of a can be rolled and the condensing lens 3a of the laser torch 3 faces one end of the paste applied to the member 4.

Next, when the laser oscillator is operated, the laser beam 12 emitted from the condenser lens 9a is emitted from the member 4
The paste applied to the substrate is irradiated and the metal powder contained in the paste is melted.

Further, when the driving source 2c is operated so that the traveling vehicle 2 moves toward the other end of the paste applied to the member 4, the traveling position of the laser beam 12 on the paste is changed by the traveling vehicle 2 when the traveling vehicle 2 is moved. Of the metal powder contained in the paste are sequentially melted and solidified to form a linear buildup layer (not shown) on the member 4
Formed on the surface of.

Further, the laser beams 13 and 13 emitted from the condenser lenses 10a and 11a are applied to the buildup layer formed on the surface of the member 4 and its vicinity so as to follow the laser beam 12, and the buildup layer is formed. And the softening of the hardening region of the member 4 is sequentially performed.

At this time, the condenser lenses 10a, 11
Since the laser beams 13 and 13 emitted from a satisfy the relationship of the above-mentioned formula (1), even if the traveling vehicle 2 displaces the laser beams 13 and 13 together with the laser beam 12 at the same speed, 4 can be softened, and thus, the hardened area of the member 4 can be efficiently softened.

FIGS. 4 and 5 show a third example of the embodiment of the laser irradiation apparatus of the present invention, in which the same reference numerals as those in FIGS. 1 to 3, 6 and 7 are attached. The parts shown in the figure represent the same thing.

In the laser irradiation apparatus shown in FIGS. 4 and 5,
A pair of rails 1, a self-propelled vehicle 2 guided by the rails 1 to move, a laser torch 14, and a position adjusting mechanism 1 for moving the laser torch 14 close to and away from the member 4.
5, a non-contact type position detector 16 that detects the distance to the surface of the member 4, and a controller 17 that operates the position adjusting mechanism 15 based on a position detection signal 16b from the position detector 16. The plurality of heaters 18 constitute a laser irradiation device.

The laser torch 14 has a torch body 14b having a condenser lens 14a.

A laser oscillator (not shown) is connected to the torch body 14b via an optical fiber 14d, and laser light oscillated from the laser oscillator is passed through the optical fiber 14d to a condenser lens 14a. The laser beam 19 which is incident and condensed by the condenser lens 14a is emitted toward the outside of the torch body 14b.

The laser beam 19 emitted from the condenser lens 14a is emitted from the condenser lens 3a of the conventional laser irradiation apparatus described above when the laser clad method is applied (see FIG. 6). Are set to have the same light intensity and beam diameter.

The position adjusting mechanism 15 is provided with a guide frame 15a provided at a portion from the rear end of the lower surface of the traveling vehicle main body 2b.
An elevating member 15b fitted to the guide frame 15a so as to be able to move up and down, a drive source 15c such as a motor attached to the guide frame 15a, and a vertical direction that rotates in the circumferential direction by the drive source 15c. Extending screw shaft 15d
And a nut 15e screwed to the screw shaft 15d.

The lifting member 15b and the nut 15e which constitute the position adjusting mechanism 15 are the same as the torch body 14b.
The laser torch 14 is moved up and down with respect to the traveling vehicle 2 by operating the drive source 15c.

The position detector 16 is suspended and supported by a portion near the front end of the lower surface of the traveling vehicle main body 2b via a hanger 16a so that the distance to the surface of the member 4 can be detected.

The position detector 16 is preferably attached to the hanger 16a so that the position in the vertical direction can be adjusted.

The controller 17 controls the position adjusting mechanism 1 based on the position detection signal 16b output from the position detector 16.
The operation signal 17a is outputted to the driving source 15c of No. 5 and the distance between the laser torch 14 and the surface of the member 4 is kept constant.

The heater 18 is constructed so as to be arranged on the back surface of the member 4, and a power source (not shown) is connected to each heater 18.

The operation of the laser irradiation apparatus shown in FIGS. 4 and 5 will be described below.

When a linear buildup layer is formed on the surface of the member 4 by the laser clad method and the hardening region of the member 4 caused by the local heating by the laser clad method is softened by the laser temper method, The permanent magnet 1c is placed at a predetermined position on the surface of the member 4 so that the portion of the member 4 where the build-up layer is to be formed is located immediately below between the rails 1 and both rails 1 are arranged in parallel. Then, a paste (not shown) containing a metal powder corresponding to the metal component of the member 4 is applied to the portion of the member 4 where the build-up layer is to be formed.

Further, the wheel 2a is the flange portion 1 of the rail 1.
The traveling vehicle 2 is mounted on the rail 1 so that the upper surface of a can be rolled and the condensing lens 3a of the laser torch 3 faces one end of the paste applied to the member 4.

Further, a plurality of heaters 18 are arranged on the back surface of the member 4 so as to correspond to the above-mentioned paste application portions.

Then, when the laser oscillator is activated, the paste applied to the member 4 is irradiated with the laser beam 19 emitted from the condenser lens 14a, and the metal powder contained in the paste is melted.

Further, when the driving source 2c is operated so that the traveling vehicle 2 moves toward the other end of the paste applied to the member 4, the traveling position of the laser beam 19 on the paste is moved by the traveling vehicle 2 moving. Of the metal powder contained in the paste are sequentially melted and solidified to form a linear buildup layer (not shown) on the member 4
Formed on the surface of.

Further, along with the movement of the traveling vehicle 2, the operation signal 17 based on the position detection signal 16b from the position detector 16
a is output from the controller 17 to the drive source 15c of the position adjusting mechanism 15, and the drive source 15c raises and lowers the laser torch 14 in accordance with the unevenness of the surface of the member 4, whereby the laser torch 14 and the surface of the member 4 are separated. The intervals are kept constant.

On the other hand, when each heater 18 is operated after the above-mentioned build-up layer is formed, the hardened area of the build-up layer and the member 4 is heated, and the softening of the hardened area is simultaneously performed over the entire length of the build-up portion. Therefore, it is possible to efficiently soften the hardening region of the member 4.

The laser irradiation apparatus of the present invention is not limited to the above-mentioned embodiments, and it goes without saying that various modifications can be made without departing from the gist of the present invention.

[0081]

As described above, the laser irradiation apparatus of the present invention can exhibit various excellent effects as described below.

(1) In the laser irradiation apparatus according to the first aspect of the present invention, since the member is irradiated with the laser beam from the plurality of laser torches, the traveling speed of the traveling vehicle can be improved and the member The cured area can be softened efficiently.

(2) In the laser irradiation apparatus according to the second aspect of the present invention, since the member is heated by the heater disposed on the back surface side of the member, the portion to be heated of the member can be entirely heated. It is possible to efficiently soften the cured area of the member.

[Brief description of drawings]

FIG. 1 is a conceptual diagram showing a first example of an embodiment of a laser irradiation apparatus of the present invention.

FIG. 2 is a conceptual diagram showing a second example of the embodiment of the laser irradiation apparatus of the present invention.

FIG. 3 is a view taken along the line III-III in FIG.

FIG. 4 is a conceptual diagram showing a third example of the embodiment of the laser irradiation apparatus of the present invention.

5 is a view taken along the line VV of FIG.

FIG. 6 is a conceptual diagram showing an example of a conventional laser irradiation device.

FIG. 7 is a view on arrow VII-VII in FIG.

[Explanation of symbols]

 1 rail 2 traveling vehicle 4 member 6 first laser torch 7 second laser torch 8 laser beam 9 first laser torch 10 second laser torch 11 third laser torch 12 laser beam 13 laser beam 14 laser torch 18 heater 19 laser beam

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kumiko Araki 1 Shin-Nakahara-cho, Isogo-ku, Yokohama-shi, Kanagawa Ishi Kawashima Harima Heavy Industries, Ltd. Yokohama Engineering Center (72) Kenji Hirano Isogo-ku, Yokohama-shi, Kanagawa Shin-Nakahara Town No. 1 Ishikawajima Harima Heavy Industries Co., Ltd. Yokohama Engineering Center (72) Inventor Shigekazu Aida No. 1 Shin Nakahara-cho, Isogo-ku, Yokohama, Kanagawa Ishi Kawashima Harima Heavy Industries Co., Ltd. Yokohama Engineering Center

Claims (2)

[Claims] 1. A rail which can be arranged at a predetermined distance from a surface of a member to be irradiated with a laser beam, a traveling vehicle which is guided and moved by the rail, and a rail which faces the surface of the member, respectively. A plurality of laser torches provided on the traveling vehicle so as to emit laser beams, and the respective laser torches are arranged so that the laser beams emitted from the laser torches are incident on the surface of the member in series in the traveling direction of the traveling vehicle. A laser irradiation device characterized in that 2. A rail which can be arranged at a predetermined distance from a surface of a member to be irradiated with a laser beam, a traveling vehicle which is guided by the rail to move, and a traveling vehicle which is provided on the traveling vehicle. A laser irradiation device comprising a laser torch that emits a laser beam toward the front surface of a member, and a heater that can be arranged on the back surface of the member.