KR102436824B1 - Laser cladding apparatus - Google Patents

Abstract

A laser cladding apparatus is disclosed. A laser cladding device according to an exemplary embodiment of the present invention is a laser cladding device for coating the inner circumferential surface of a tubular member by entering the inner space of a tubular member disposed in an upright state to be perpendicular to the ground. a body formed in a columnar shape extending a predetermined length, having a cross section smaller than that of the tubular member and having a space therein; a laser movement module that is built into the body and has a space therein so that the laser can move in a direction toward the ground; A reflective surface that reflects the laser emitted from one end of the laser moving module to the inner circumferential side so as to melt the metal powder on the injection module and the inner circumferential surface, which is installed spaced apart from the laser moving module inside the body, and sprays metal powder from the body to the inner circumferential side. including a reflective module having A rotation member for pivotally rotating the reflective surface about a rotation axis parallel to the ground is provided, and when the focal length of the laser is changed according to the rotation of the rotation member, the injection module moves up and down in response to the changed focal length.

Description

LASER CLADDING APPARATUS

The present invention relates to a laser cladding device, and more particularly, to a laser cladding device for coating an inner circumferential surface of a tubular member disposed in an upright state.

In the dissimilar material coating technology using 3D printing, the conventional laser cladding technology uses a conical nozzle, so the nozzle size is generally 150 mm or more in length, and the width is also enlarged to 60 mm or more, so that the inner diameter is There is a problem in that it is difficult to coat the inner surface of a pipe or tube narrower than 2.5 inches.

Recently, to solve this problem and to coat the inner diameter of a tube or a tube, as in US Patent No. 9,126,286 B2, a horizontal nozzle 10' has been developed, but when the length of the horizontal nozzle is increased, the length of the body portion is increased. If it is lengthened, a phenomenon in which the entire nozzle sags in the vertical direction due to gravity may occur. As a result, as shown in FIG. 1 , there is a problem in that the alignment of the equipment is easily misaligned because the focus between the powder injection position and the laser is not met, and the laser cladding is impossible because the focus of the laser is not met.

In addition, since powder and gas must be supplied in the horizontal direction, as the length of the supply pipe increases, the powder may stagnate in the middle or the gas may not flow smoothly.

Due to the above-described problem, the conventional horizontal nozzle has a problem in that it is difficult to apply it to the inner diameter coating of a long pipe or tube as the applicable length is limited.

US Registered Patent No. US 9,126,286 B2

An embodiment of the present invention is to provide a laser cladding device capable of effectively coating the inner circumferential surface of a tubular member without causing sagging of the device itself.

An embodiment of the present invention is to provide a laser cladding device capable of expanding the laser cladding area on the inner circumferential surface of a tubular member.

An embodiment of the present invention is to provide a laser cladding device capable of preventing quality deterioration due to residual metal powder.

According to one aspect of the present invention, there is provided a laser cladding device for coating the inner circumferential surface of the tubular member by entering the inner space of the tubular member disposed in an upright state to the ground, and extending a predetermined length along the extension direction of the tubular member. a body having a cross section smaller than that of the tubular member and having a space therein; a laser moving module embedded in the body and having a space therein so that the laser can move in a direction toward the ground; It is installed spaced apart from the laser movement module in the inside of the body, and is emitted from one end of the laser movement module so as to melt the metal powder on the injection module and the inner peripheral surface for ejecting the metal powder from the body toward the inner peripheral surface. and a reflective module having a reflective surface for reflecting the laser toward the inner peripheral surface, the inner peripheral surface is coated by the molten metal powder, and the body is moved in the vertical direction to expand the coating area of the inner peripheral surface in the vertical direction. moving, and the reflection module includes a rotation member for pivotally rotating the reflection surface about a rotation axis parallel to the ground so as to adjust the reflection angle of the laser, and the focal length of the laser according to the rotation of the rotation member When is changed, the injection module moves in the vertical direction in response to the changed focal length, a laser cladding device is provided.

At this time, the injection module is formed in the form of a tube, and includes an inclined portion extending to be inclined at a predetermined angle with respect to the vertical direction so as to spray the metal powder inclined toward the inner peripheral surface, and the metal powder at one end of the inclined portion. This final injection hole may be formed.

In this case, the injection hole may be formed such that a cross section including the injection hole is perpendicular to an extension direction of the inclined portion.

At this time, at least a portion of the inclined portion may protrude from the body toward the inner circumferential surface.

In this case, the range of the predetermined angle may be 40 degrees or more and 50 degrees or less.

delete

delete

At this time, further comprising a suction module installed on the inner side of the body or the outer circumferential surface of the body, the suction module is opened toward the lower portion of the tubular member to suck the residual metal powder that has fallen to the lower side of the tubular member A suction port may be provided.

In this case, the suction module may be disposed on the opposite side to the injection module with respect to the laser movement module.

At this time, an image sensor module disposed on the upper side of the laser movement module and generating image information by receiving the light reflected in the upper direction of the tubular member by the reflective surface so as to check the coating state of the inner peripheral surface. may include

At this time, the tubular member further comprises a holder for supporting while enclosing at least a portion of the outer peripheral surface of the tubular member to maintain the upright state, the holder is the ground to expand the coating area of the inner peripheral surface in the circumferential direction The tubular member may be rotated with respect to a central axis perpendicular to the .

In this case, the holder includes a support part that contacts and supports one end side adjacent to the ground among both ends of the tubular member and a cover part that closes the one end of the tubular member, and the cover part is the remaining part that has fallen to the one end side. At least one opening may be provided so that the metal powder is discharged to the outside of the tubular member.

The laser cladding device according to an embodiment of the present invention has a body that enters in a direction perpendicular to the ground in an upright state of the tubular member, thereby preventing the entire laser cladding device from sagging due to gravity. This can improve the quality of the laser cladding by maintaining the laser focal length at a target level.

In addition, the laser cladding apparatus according to an embodiment of the present invention can further expand the laser cladding range on the inner circumferential surface by having a reflection module capable of freely adjusting the reflection angle of the laser.

And the laser cladding device according to an embodiment of the present invention can improve the straightness of the metal powder by making the cross section including the injection hole of the powder module perpendicular to the extending direction of the inclined portion.

In addition, the laser cladding apparatus according to an embodiment of the present invention includes a suction module for sucking the residual metal powder and a holder having an opening, thereby preventing deterioration of laser cladding quality due to the residual metal powder.

1 is a view for explaining a sagging phenomenon of a laser cladding device according to the prior art.
2 is a perspective view illustrating a laser cladding device according to an embodiment of the present invention.
3 is a cross-sectional view illustrating a cross-section of a laser cladding apparatus according to an embodiment of the present invention.
4 is a perspective view illustrating a spray module of a laser cladding apparatus according to an embodiment of the present invention.
5 is a cross-sectional view showing a cross-section of the injection module of the laser cladding apparatus according to an embodiment of the present invention.
6 is a view for explaining and comparing the advantages of the injection hole of the injection module of the laser cladding device according to an embodiment of the present invention.
7 is a perspective view illustrating a reflection module of a laser cladding apparatus according to an embodiment of the present invention.
8 and 9 are views for explaining the effect of the pivot rotation of the reflection module of the laser cladding apparatus according to an embodiment of the present invention.
10 is a view for explaining the function of the holder of the laser cladding device according to an embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings, embodiments of the present invention will be described in detail so that those of ordinary skill in the art to which the present invention pertains can easily implement them. The present invention may be embodied in many different forms and is not limited to the embodiments described herein. In order to clearly explain the present invention in the drawings, parts irrelevant to the description are omitted, and the same reference numerals are assigned to the same or similar components throughout the specification.

In this specification, terms such as "comprises" or "have" are intended to designate that the features, numbers, steps, operations, components, parts, or combinations thereof described in the specification exist, but one or more other features It is to be understood that it does not preclude the possibility of the presence or addition of numbers, steps, operations, components, parts, or combinations thereof.

In this specification, in defining the direction, the up-down direction is defined as a direction toward the upper side or the lower side in a state perpendicular to the ground, and the horizontal direction is defined as a direction parallel to the ground.

1 is a view for explaining a sagging phenomenon of a laser cladding device according to the prior art. 2 is a perspective view illustrating a laser cladding device according to an embodiment of the present invention. 3 is a cross-sectional view illustrating a cross-section of a laser cladding apparatus according to an embodiment of the present invention.

Laser cladding device 10 according to an embodiment of the present invention, as shown in FIG. 2 , with respect to the tubular member 90 disposed in an upright state to be perpendicular to the ground surface G, in the inner space 91 It is a device capable of coating the inner circumferential surface 93 of the tubular member 90 by entering the vertical state.

At this time, it is noted that the tubular member 90 may include any type of tube in which a space in which a fluid can move is formed, such as a pipe, a pipe, and a tube.

,

)으로 이동하는 몸체(20)를 포함한다.First, referring to FIG. 2 , the laser cladding device 10 according to an embodiment of the present invention enters the inside of the tubular member 90 and moves in the vertical direction (

,

) includes a body 20 that moves to.

The body 20 is formed in a columnar shape extending a predetermined length along the extending direction of the tubular member 90 , and may have a smaller cross-section than the tubular member 90 to allow entry into the interior of the tubular member 90 .

As a specific example, the body 20 may be formed in a cylindrical shape, as shown in FIG. 2 , but examples of the shape are not limited thereto, and may be formed in various types of columnar shapes.

At this time, the body 20 has a space 22 therein, so that the laser movement module 30 , the injection module 40 , the reflection module 50 , etc. to be described later can be accommodated in the internal space 22 . have. That is, the body 20 may serve as a housing in which a part of the configuration of the laser cladding device 10 according to an embodiment of the present invention can be accommodated or fixed.

Referring to FIG. 3 , the laser cladding device 10 according to an embodiment of the present invention is embedded in the body 20 , and a space 32 extending along the extension direction of the body 20 is formed therein. It may include a laser movement module 30 that is.

At this time, the laser movement module 30 may provide a space 32 so that the laser (L) irradiated from the inside or outside of the body 20 can move in a direction toward the ground (G). Here, the laser irradiation module 34 for irradiating the laser (L) toward the laser moving module 30 is separately present in the upper space of the body 20, or as shown in FIG. 3, the inner space of the body 20 ( 22) may exist.

In one embodiment of the present invention, the laser movement module 30 is separately manufactured to have a tubular shape and then fixedly installed inside the body 20, or when the body 20 is manufactured (eg, injection molding). ) It may be built into the body 20 by providing a space corresponding to the laser movement module 30 inside the body 20 integrally.

4 is a perspective view illustrating a spray module of a laser cladding apparatus according to an embodiment of the present invention. 5 is a cross-sectional view showing a cross-section of the injection module of the laser cladding apparatus according to an embodiment of the present invention. 6 is a view for explaining and comparing the advantages of the injection hole of the injection module of the laser cladding device according to an embodiment of the present invention.

The laser cladding apparatus 10 according to an embodiment of the present invention may include a spraying module 40 for spraying the metal powder M from the body 20 to the inner circumferential surface 93 of the tubular member 90 .

At this time, referring back to FIG. 3 , the injection module 40 may be formed in a tube shape having a hollow. Also, the injection module 40 is located inside the body 20 , and may be installed to be horizontally spaced apart from the laser movement module 30 .

Specifically, referring to FIG. 4 , after the metal powder M is moved together with the carrier gas through the inner space 44 of the injection module 40 formed in a tube shape, the injection port formed on one side of the injection module 40 ( 43) can be sprayed through. At this time, the metal powder M and the carrier gas may be supplied from a separate powder supply module 47, and the powder supply module 47 is located inside the body 20 like the laser irradiation module 34 described above. It may exist, or it may exist separately on the outside of the body 20 .

And, referring back to FIG. 4 , the protective gas may be moved through the outer space 45 surrounding the inner space 44 of the injection module 40 , and the protective gas may also be injected to the outside through the injection hole 43 . can At this time, the protective gas may form air curtains 46 and 47 on the outside of the sprayed metal powder M so that the metal powder M discharged through the injection port 43 does not spread widely and goes straight in a certain area. can

Looking at the structure of the injection module 40 in more detail, the injection module 40 has a straight line portion 41 extending in the same direction as the extension direction of the laser movement module 30, and a predetermined angle ( a sloped portion 42 extending obliquely by α). At this time, the injection hole 43 may be formed on one end side of the inclined portion (42).

In this way, including the inclined portion 42 is to inject the metal powder (M) inclined toward the inner peripheral surface 93 of the tubular member 90, so that the metal powder (M) meets the laser (L) to be described later and melts. to be.

In one embodiment of the present invention, the inclination angle α formed between the straight portion 41 and the inclined portion 42 may be 40 degrees or more and 50 degrees or less. This is to maximize the efficiency of the metal powder M by stably crossing the metal powder M and the laser L on the inner circumferential surface 93 of the tubular member 90 .

More specifically, if the inclination angle (α) is less than 40 degrees, the injection distance is long until the metal powder (M) reaches the inner peripheral surface (93), the metal powder (M) is a relatively inner peripheral surface (93), there is a problem that is sprayed toward the lower side. Conversely, when the inclination angle (α) is 50 degrees or more, the injection angle of the metal powder (M) is formed in parallel with the laser (L) reflected by the reflection module 50, so that it is difficult to cross on the inner peripheral surface (93) have.

On the other hand, in one embodiment of the present invention, a part of the inclined portion 42 of the injection module 40 is formed to protrude a predetermined distance from the body 20 toward the inner peripheral surface of the tubular member 90 as shown in FIG. can This minimizes the distance that the metal powder M discharged through the injection hole 43 moves to the inner circumferential surface 93 of the tubular member 90 , so that the metal powder M more accurately reaches the target point on the inner circumferential surface 93 . in order to do it

Meanwhile, referring to FIG. 5 , looking at the angle of the cross section including the injection hole 43 of the inclined portion 42 , the cross section may be formed to be perpendicular to the extending direction of the inclined portion 42 . This is to ensure that the metal powder (M) injected from the injection port 43 maintains straightness as much as possible.

If the cross-section including the injection hole 43 is not perpendicular to the extending direction of the inclined portion 42 as shown in FIG. 6 , the air curtains 46 and 47 formed on both sides of the metal powder M are formed of metal. An asymmetry is formed based on the powder (M). Accordingly, the metal powder M is bent in one direction in which the air curtains 46 and 47 do not exist in the region adjacent to the inner circumferential surface 93 , and as a result, the metal powder M reaches the target point on the inner circumferential surface 93 . There is a problem that cannot be done.

In an embodiment of the present invention, the injection module 40 may move in the vertical direction inside the body 20 . This is to allow the metal powder M to more effectively meet the laser in response to a change in the focal length of the laser by the reflection module 50 . This will be described in more detail through the following description.

7 is a perspective view illustrating a reflection module of a laser cladding apparatus according to an embodiment of the present invention. 8 and 9 are views for explaining the effect of the pivot rotation of the reflection module of the laser cladding apparatus according to an embodiment of the present invention.

The laser cladding apparatus 10 according to an embodiment of the present invention includes a reflection module 50 disposed adjacent to an end of the laser movement module 30 .

Specifically, referring to FIGS. 3 and 7 , the reflection module 50 reflects the laser L emitted from one end of the laser moving module 30 toward the inner circumferential surface 93 to melt the metal powder on the inner circumferential surface. A reflective surface 52 is provided.

At this time, the reflective surface 52 may be formed in the shape of a plate material to easily reflect the laser (L).

In addition, the reflection module 50 includes a rotation member 54 for pivotally rotating the reflection surface 52 about the rotation axis R so that the angle at which the laser L is rotated by the reflection surface 52 can be adjusted. can do. Here, the rotation axis (R) may be parallel to the ground (G).

As such, adjusting the reflection angle of the laser L by using the rotating member 54 is to perform a coating process on various regions present on the inner circumferential surface of the tubular member 90 .

In more detail, as in the example shown on the left side of FIG. 8 , when the reflective surface 52 has only a single reflection angle, the point at which the laser L reaches the inner circumferential surface 93 of the tubular member 90 . become single Conversely, when the reflection angle of the reflective surface 52 can be adjusted as in the laser cladding device 10 according to an embodiment of the present invention, as shown in the example shown on the right side of FIG. 8 , the body 20 has a certain height. There is an advantage in that the laser (L) can be irradiated to various points on the inner circumferential surface 93 even in the fixed state.

The reflection angle control function of the reflection module 50 is particularly effective when coating the lowermost portion of the tubular member 90 . This is because, when adjacent to the lowermost side of the tubular member 90, the body 20 is further restricted from moving in the downward direction. Accordingly, if only the laser L1 of a single reflection angle is provided, there is a problem that coating cannot be performed on the portions S2 and S3 below the critical point S1 on the inner circumferential surface 93 . On the other hand, the laser cladding apparatus 10 according to an embodiment of the present invention adjusts the reflection angle to other points S2 and S3 existing below the critical point S1 to irradiate the lasers L2 and L3 of various angles. can do. Through this, the laser cladding apparatus 10 according to an embodiment of the present invention has the advantage of being able to further expand the coating range on the inner circumferential surface 93 .

Also, referring to FIG. 9 , according to an embodiment of the present invention, a sufficient coating operation may be performed on the protrusion 96 protruding from the inner circumferential surface 93 , for example, the flange portion.

Specifically, when the reflection angle of the laser L cannot be adjusted, the focal length is always fixed, so the focal length does not match for the upper or lower surface of the protrusion 96 shown in FIG. 9, so coating cannot be performed. there is a problem. However, in this case, the reflection module 50 of the laser cladding apparatus 10 according to an embodiment of the present invention may change the focal length by adjusting the reflection angle of the laser.

,

)으로 이동할 수 있다. 즉, 레이저의 초점 거리만을 변경시키고, 분사 모듈(40)은 이전과 동일한 상태로 계속 분사할 경우, 레이저(L)와 금속 분말(M)은 목표로 하는 내주면(93) 또는 돌출부(96) 상의 한 점에서 효과적으로 만날 수가 없는 문제가 있다. 레이저의 초점 거리가 변경되었기 때문이다. 이경우, 도 9에 도시되는 바와 같이 분사 모듈(40)이 상하 방향으로 이동함으로써, 목표 지점에 대한 코팅을 수행할 수 있다.In this regard, in one embodiment of the present invention, when the focal length of the laser is changed according to the rotation of the rotating member 54, the injection module 40 is moved in the vertical direction (

,

) can be moved to That is, when only the focal length of the laser is changed, and the injection module 40 continues to spray in the same state as before, the laser (L) and the metal powder (M) are on the target inner peripheral surface 93 or the protrusion 96. There is a problem that cannot be effectively met at one point. This is because the focal length of the laser has changed. In this case, as shown in FIG. 9 , by moving the spray module 40 in the vertical direction, it is possible to perform coating on the target point.

Meanwhile, the rotating member 54 is provided with a separate gear unit 56 for rotating the rotating shaft R as shown in FIG. 9 , and the gear unit 56 is driven by an electric motor (not shown). can be Through this, the rotation angle of the rotation shaft can be adjusted more precisely and quickly.

The laser cladding apparatus 10 according to an embodiment of the present invention includes a suction module 60 that sucks the residual metal powder MR that has not been melted by the laser L and has fallen to the lower side of the tubular member 90 . can do.

In more detail, the metal powder M sprayed from the injection port 43 is not all melted, but some are not melted, and fall in the direction of gravity. The residual metal powder MR may be stacked inside the tubular member 90 to adversely affect the quality of the printing result.

The suction module 60 is for inhaling the residual metal powder (MR). Referring to FIG. 2 , the suction module 60 is disposed inside the body 20 and spaced apart from the laser movement module 30 . can be However, unlike the drawings, it may be installed on one side of the outer circumferential surface of the body 20 rather than the inside of the body 20 , and in particular, may be formed to be detachably attached to the body 20 as necessary. This is because, when the lower portion of the tubular member 90 is in an open form, separate suction may not be required. Because.

At this time, the suction module 60 may include a tube, and by forming a negative pressure inside the tube, it is possible to suck the metal powder M from the outside of the body 20 . In addition, the residual metal powder sucked by the suction module 60 may be stored in a separate powder storage module 64 and then discharged by an operator after the cladding process is completed.

Meanwhile, the suction module 60 may be disposed on the opposite side to the injection module 40 in the vertical direction with respect to the laser movement module 30 . That is, the suction module 60 and the injection module 40 may be disposed at positions spaced apart from each other as much as possible. This is when the suction module 60 and the injection module 40 are disposed adjacent to each other, the metal powder M sprayed by the injection module 40 to the suction module 60 before reaching the inner peripheral surface 93. This is because it may interfere with the inhalation or injection of the metal powder (M).

The laser cladding apparatus 10 according to an embodiment of the present invention may further include an image sensor module 70 to check the coating state of the inner circumferential surface 93 in real time.

At this time, the image sensor module 70 is disposed on the upper side of the laser movement module 30 as shown in FIG. 3 , and receives the light reflected in the upper direction of the tubular member 90 to generate image information. have. At this time, after the light received by the image sensor module 70 is reflected by the reflection module 50 , it may be moved in a direction opposite to the ground G along the laser movement module 30 .

Through the image sensor module 70, the operator can effectively observe the coating state of the inner peripheral surface of the tubular member 90, which is difficult to observe with the naked eye, and when a problem occurs, the cladding process can be immediately stopped.

10 is a view for explaining the function of the holder of the laser cladding device according to an embodiment of the present invention.

The laser cladding apparatus 10 according to an embodiment of the present invention may include a holder 80 to stably maintain the upright state of the tubular member 90 .

At this time, the holder 80 may support while surrounding at least a portion of the outer circumferential surface 95 in an upright state of the tubular member 90 . As a non-limiting example, as shown in FIG. 2 , the holder 80 may be formed to be engageable with the tubular member 90 by having a circular groove corresponding to one side of the tubular member 90 . .

In one embodiment of the present invention, the holder 80 may rotate the tubular member 90 about a central axis perpendicular to the ground in order to expand the coating area of the inner circumferential surface 93 in the circumferential direction of the inner circumferential surface 93. . That is, in order to advance the laser cladding on the inner circumferential surface 93 in the circumferential direction, it is necessary that the body 20 rotates by itself or the inner circumferential surface 93 of the tubular member 90 rotates. To this end, in the case of the body 20 in which many modules are embedded, the holder 80 may pivot the tubular member 90 to maintain a relatively stable state. However, the expansion of the inner circumferential surface of the laser cladding device 10 according to an embodiment of the present invention is not limited thereto, and the body may be axially rotated about the central axis as needed.

Meanwhile, referring to FIG. 10 , the holder 80 may be coupled to one end side adjacent to the ground among both ends of the tubular member 90 .

At this time, the holder 80 may include a coupling portion 82 coupled to support a portion of the outer circumferential surface 95 and a cover portion 84 for closing one end of the tubular member 90 . Through such a structure, the holder 80 may more stably maintain the upright state of the tubular member 90 .

In this regard, referring back to FIG. 10 , the cover part 84 may include a plurality of openings 86 for discharging the residual metal powder MR that has fallen in the direction of gravity to the outside. As described above, since the residual metal powder (MR) may affect the cladding quality, it is to be quickly discharged to the outside.

As described above, the laser cladding device according to an embodiment of the present invention includes a body that enters in a direction perpendicular to the ground in an upright state of the tubular member, thereby preventing the entire laser cladding device from sagging due to gravity. . This can improve the quality of the laser cladding by maintaining the laser focal length at a target level.

In addition, the laser cladding apparatus according to an embodiment of the present invention can further expand the laser cladding range on the inner circumferential surface by having a reflection module capable of freely adjusting the reflection angle of the laser.

And the laser cladding device according to an embodiment of the present invention can improve the straightness of the metal powder by making the cross section including the injection hole of the powder module perpendicular to the extending direction of the inclined portion.

In addition, the laser cladding apparatus according to an embodiment of the present invention includes a suction module for sucking the residual metal powder and a holder having an opening, thereby preventing deterioration of laser cladding quality due to the residual metal powder.

Although one embodiment of the present invention has been described above, the spirit of the present invention is not limited to the embodiments presented herein, and those skilled in the art who understand the spirit of the present invention can add components within the scope of the same spirit. , changes, deletions, additions, etc. may easily suggest other embodiments, but this will also fall within the scope of the present invention.

10 Laser cladding device 20 Body
30 laser movement module 40 jetting module
50 Reflection module 60 Suction module
70 Image sensor module 80 Holder
90 tubular member L laser
M metal powder MR residual metal powder

Claims (12)

A laser cladding device for coating the inner circumferential surface of the tubular member by entering the inner space of the tubular member disposed in an upright state to be perpendicular to the ground, comprising:
a body formed in a columnar shape extending a predetermined length along the extension direction of the tubular member, the body having a cross section smaller than the cross section of the tubular member and having a space therein;
a laser moving module embedded in the body and having a space therein so that the laser can move in a direction toward the ground;
a spray module installed to be spaced apart from the laser movement module in the inside of the body, and spraying metal powder from the body toward the inner circumferential surface; and
and a reflective module having a reflective surface for reflecting the laser emitted from one end of the laser moving module toward the inner peripheral surface to melt the metal powder on the inner peripheral surface,
The inner peripheral surface is coated by the molten metal powder, and the body is moved in the vertical direction to expand the coating area of the inner peripheral surface in the vertical direction,
The reflection module includes a rotating member for pivotally rotating the reflection surface about a rotation axis parallel to the ground so as to adjust the reflection angle of the laser,
When the focal length of the laser is changed according to the rotation of the rotating member, the injection module moves in the vertical direction in response to the changed focal length. The method of claim 1,
The injection module is formed in the form of a tube, and includes an inclined portion extending inclined at a predetermined angle with respect to the vertical direction so as to spray the metal powder inclined toward the inner circumferential side,
A laser cladding device, in which an injection hole through which the metal powder is finally injected is formed at one end of the inclined portion. 3. The method of claim 2,
The injection hole, the laser cladding device, the cross-section including the injection hole is formed to be perpendicular to the extending direction of the inclined portion. 3. The method of claim 2,
At least a portion of the inclined portion protrudes from the body toward the inner circumferential surface. 3. The method of claim 2,
The range of the predetermined angle is 40 degrees or more and 50 degrees or less, a laser cladding device. delete delete The method of claim 1,
Further comprising a suction module installed on the inside of the body or the outer circumferential surface of the body,
and the suction module has a suction port opened toward the lower part of the tubular member to suck in the residual metal powder that has fallen to the lower side of the tubular member. 9. The method of claim 8,
The suction module is disposed on the opposite side to the injection module with respect to the laser movement module, a laser cladding device. The method of claim 1,
It is disposed on the upper side of the laser movement module, further comprising an image sensor module for generating image information by receiving the light reflected in the upper direction of the tubular member by the reflective surface so as to check the coating state of the inner peripheral surface, laser cladding device. The method of claim 1,
Further comprising a holder for supporting while surrounding at least a portion of the outer peripheral surface of the tubular member to maintain the upright state,
and the holder rotates the tubular member about a central axis perpendicular to the ground to expand the coating area of the inner circumferential surface in a circumferential direction. 12. The method of claim 11,
The holder includes a support part for contacting and supporting one end side adjacent to the ground among both ends of the tubular member, and a cover part for closing the one end of the tubular member,
The cover part has at least one opening so that the residual metal powder that has fallen toward the one end is discharged to the outside of the tubular member, the laser cladding device.

Images