KR101858558B1 - Apparatus for cladding - Google Patents

Abstract

An invention relating to a cladding apparatus is disclosed. The disclosed cladding apparatus comprises: a supply channel into which a powder is input; A rotatable housing portion rotatably coupled to the supply channel, the rotatable housing portion receiving laser and powder from the supply channel; A laser irradiation unit coupled to the rotation housing unit and configured to irradiate the laser received from the rotation housing unit; And a powder spraying unit coupled to the rotating housing unit and spraying the powder supplied from the supply channel, wherein the rotating housing unit is rotated by a reaction force generated when the powder is sprayed from the powder spraying unit.

Description

APPARATUS FOR CLADDING

The present invention relates to a cladding apparatus, and more particularly, to a cladding apparatus for performing a cladding process by injecting powder to a member to be processed and hardening the injected powder with a laser.

Generally, the cladding device corresponds to a device for bonding a metal to a workpiece. In the case of the laser cladding method, different materials such as powder, foil, and wire are alloyed or grown on the surface of the workpiece to increase the service life of the workpiece, and it is easy to control the thickness of the growth layer.

In addition, the laser cladding method has the effect of narrowing the heat affected part when performing the cladding operation, exerting the bonding force between the soldering material and the workpiece, and freely adjusting the shape of the cladding layer.

Conventional cladding apparatuses employing such a laser cladding method perform cladding in such a manner that the workpiece is rotated and moved in a state in which the nozzle is fixed, since the workpiece is processed using the fixed nozzle. In the case where the workpiece is large It is difficult to rotate and move the workpiece, and when a configuration for rotating and moving the nozzle is added, the configuration and control of the apparatus become complicated. Therefore, there is a need for improvement.

BACKGROUND ART [0002] The background art of the present invention is disclosed in Korean Patent Registration No. 10-1605970 (entitled "Rotating and Fixing Apparatus for Laser Cladding Work", Registered on Mar. 17, 2016).

SUMMARY OF THE INVENTION It is an object of the present invention to provide a cladding apparatus capable of rotating a laser irradiation unit and a powder jet unit with a simple structure.

A cladding device according to the present invention comprises: a supply channel into which a powder is input; A rotary housing rotatably coupled to the supply channel, the rotary housing receiving laser and powder from the supply channel; A laser irradiation unit coupled to the rotation housing unit and irradiating the laser received from the rotation housing unit; And a powder spraying part coupled to the rotation housing part and spraying the powder supplied from the supply channel, wherein the rotation housing part is rotated by a reaction force generated when the powder is sprayed from the powder spraying part .

In the present invention, the supply channel may include an inner channel through which the laser generated in the laser supply unit passes; And an outer channel which receives the powder from the powder supply part, surrounds the inner channel, and moves the powder between the inner channel and the inner channel.

In the present invention, the rotating housing part may include an inner housing for communicating the inner channel and the laser irradiating part; And an outer housing that surrounds the inner housing and communicates with the outer channel to transmit the powder received from the outer channel to the powder spraying unit.

In the present invention, the rotation housing part may further include an agglomeration prevention part having a blade positioned between the inner housing and the outer housing to prevent agglomeration of the powder received between the inner housing and the outer housing .

In the present invention, the laser irradiation unit may include an irradiation housing installed in the rotation housing part, communicating with the rotation housing part, and receiving the laser from the rotation housing part; A fixed lens unit fixed to the irradiation housing and through which the laser passes; And a moving lens unit passing through the laser and being movably provided in the irradiation housing.

In the present invention, the movable lens unit may include: a movable lens housing installed in the irradiation housing; A magnet unit coupled to the movable lens housing and generating a magnetic force; A movable lens movably inserted into the movable lens housing; And a lens moving part to which the moving lens is coupled and which includes an electromagnet and is moved in a longitudinal direction of the irradiation housing.

In the present invention, the moving lens unit may further include a moving lens elastic part coupled to the moving lens housing and contacting the lens moving part, the moving lens including an elastic material to restrict movement of the moving lens part. do.

In the present invention, the powder jetting unit may include a jetting housing unit installed in the rotary housing unit and receiving powder from the rotary housing unit; And a spray nozzle unit coupled to the spray housing unit and spraying powder received from the spray housing unit.

The cladding apparatus according to the present invention may further include a rotation restricting portion installed in the supply channel or the rotation housing portion and restricting rotation of the rotation housing portion with respect to the supply channel.

In the present invention, the rotation restricting portion may include: a rotation restricting housing coupled to the supply channel; And a stopper portion coupled to the rotation housing portion and rubbing against the rotation limiting housing when the rotation speed of the rotation housing portion is higher than a predetermined speed.

In the present invention, the stopper portion may include a stopper housing coupled to the rotation housing portion, the stopper housing being spaced apart from the rotation limiting housing and having a stopper hole formed on an outer circumferential surface thereof; A stopper accommodated in the stopper housing and moving toward the rotation limiting housing by a centrifugal force when the rotation housing portion is rotated; And a stopper supporting portion located between the stopper and the outer peripheral surface of the stopper housing to elastically support the stopper; And a control unit.

The cladding apparatus according to the present invention rotates the laser irradiating unit and the powder jet unit using the powder jet or the fluid jetting pressure from the powder jetting unit so that the laser irradiating unit and the powder jetting unit The part can be rotated.

Further, according to the present invention, the moving lens portion is applied to the laser irradiating portion, and by moving the lens, the laser irradiation performance can be improved by adjusting the focal distance of the laser according to the distance to the work.

In addition, the present invention is equipped with a rotation restricting portion, thereby restricting rotation speed of the rotating housing portion, thereby preventing breakage of the device and accurate cladding.

1 is a perspective view schematically showing a cladding device according to an embodiment of the present invention.
FIG. 2 is a perspective view showing a configuration of a cladding device according to an embodiment of the present invention.
3 is a cross-sectional view of a cladding device according to an embodiment of the present invention.
4 is a perspective view showing a rotating housing part, a laser irradiation part, and a powder jet part in a cladding device according to an embodiment of the present invention.
5 is a plan view showing a rotating housing part, a laser irradiation part and a powder jet part in a cladding device according to an embodiment of the present invention.
6 is a view showing a moving lens unit in a cladding apparatus according to an embodiment of the present invention.
7 is a view schematically showing the operation of the rotation restricting part according to an embodiment of the present invention.
8 is a cross-sectional view illustrating movement of laser and powder in a cladding device according to an embodiment of the present invention.

Hereinafter, an embodiment of a cladding apparatus according to the present invention will be described with reference to the accompanying drawings. In this process, the thicknesses of the lines and the sizes of the components shown in the drawings may be exaggerated for clarity and convenience of explanation.

In addition, the terms described below are defined in consideration of the functions of the present invention, which may vary depending on the intention or custom of the user, the operator. Therefore, definitions of these terms should be made based on the contents throughout this specification.

FIG. 1 is a perspective view schematically showing a cladding apparatus according to an embodiment of the present invention, FIG. 2 is a perspective view showing a configuration of a cladding apparatus according to an embodiment of the present invention, FIG. 3 is a cross- Sectional view of a cladding apparatus according to the present invention.

1 to 3, a cladding apparatus 1 according to an embodiment of the present invention includes a supply channel 100, a rotation housing unit 200, a laser irradiation unit 300, and a powder injection unit 400 , And alloys or fuses dissimilar materials to the workpiece (50).

In the present embodiment, the workpiece 50 is exemplified by a part in which a piston or the like is movably inserted or an internal space 51 is formed such that a correlated part is accommodated, for example, a cylinder block of a vehicle or the like. The cladding device 1 is rotated while the rotary housing part 200, the laser irradiation part 300 and the powder injection part 400 are inserted into the internal space 51, .

The supply channel 100 is connected to the laser supply unit 10 and the powder supply unit 30 so that the laser L and the powder P supplied from the laser supply unit 10 and the powder supply unit 30 are input, The laser L and the powder P pass through the supply channel 100 and are transferred to the rotary housing part 200. In this embodiment, the supply channel 100 includes an inner channel 110 and an outer channel 130.

The inner channel 110 guides the movement of the laser L received from the laser supply unit 10 to the rotation housing unit 200. The inner channel 110 is formed in a substantially tubular shape and communicates with the inner housing 210 of the rotating housing part 200 so that the laser L received from the laser supplying part 10 is passed through the inner housing 210 ).

Since the inner channel 110 is located outside the outer channel 130 and the powder P enters the outer channel 130 and is transmitted to the rotating housing unit 200, An inner O ring 111 is installed between the inner housing 110 and the inner housing 210 to prevent the powder P from flowing between the inner channel 110 and the inner housing 210.

The outer channel 130 receives the powder P from the powder supply unit 30 and surrounds the inner channel 110. The powder channel P receives the powder P from the powder supply unit 30 through the inner channel 110 And is transferred between the inner housing 210 and the outer housing 230 of the rotary housing part 200, specifically, the rotary housing part 200.

The inner channel 110 is accommodated in the inner channel 110 and the powder P delivered from the powder supply unit 30 is supplied to the inner housing 110 of the rotary housing unit 200 210 and the outer housing 230,

When the powder P is transferred from the outer channel 130 to the outer housing 230 to prevent the powder P from leaking between the outer channel 130 and the outer housing 230, A ring-shaped outer O-ring 131 including an elastic material may be mounted between the outer housing 230 and the outer housing 230.

FIG. 4 is a perspective view showing a rotating housing part, a laser irradiating part and a powder injecting part in a cladding device according to an embodiment of the present invention, FIG. 5 is a perspective view of a rotating housing part, Fig.

4 and 5, the rotary housing part 200 is rotatably coupled to the supply channel 100 via a bearing 70 and the like. The laser L and the powder P are supplied from the supply channel 100, ≪ / RTI > In this embodiment, the rotary housing part 200 includes an inner housing 210 and an outer housing 230.

The inner housing 210 communicates the inner channel 110 and the laser irradiation unit 300 to guide the movement of the laser L received from the inner channel 110 to the laser irradiation unit 300. In this embodiment, the inner housing 210 is formed in a substantially cylindrical shape and receives the laser L from the inner channel 110.

The outer housing 230 surrounds the inner housing 210 and communicates with the outer channel 130 to transmit the powder P delivered from the outer channel 130 to the powder spraying unit 400.

In this embodiment, the outer housing 230 surrounds the inner housing 210, and the upper portion coupled with the outer channel 130 is formed in a substantially cylindrical shape. The outer housing 230 has a lower portion where the laser irradiating unit 300 and the powder spraying unit 400 are coupled to each other and is narrowed downward so that the powder P, ) Side to the outside.

In this embodiment, the rotation housing part 200 further includes an anti-aggregation part 250. The coagulation preventing portion 250 includes a blade 251 positioned between the inner housing 210 and the outer housing 230 to prevent the powder P contained in the gap between the inner housing 210 and the outer housing 230 Crush agglomerates.

In this embodiment, the coagulation preventing portion 250 includes a plurality of blades 251. In this embodiment, the blades 251 protrude from the inner circumferential surface of the outer housing 230 and are formed to be bent in one direction while advancing toward the rotation center side of the outer housing 230, So as to prevent aggregation of the powder P.

The laser irradiation unit 300 is coupled to the rotation housing unit 200 and irradiates the laser beam L received from the rotation housing unit 200 to the work 50. In this embodiment, the laser irradiation unit 300 includes an irradiation housing 310, a fixed lens unit 330, and a moving lens unit 350.

The irradiation housing 310 is installed in the rotation housing part 200 and communicates with the rotation housing part 200 to receive the laser L from the rotation housing part 200 and to receive the laser L ). The irradiation housing 310 communicates with the rotary housing part 200 and specifically the inner housing 210 to receive the laser L from the inner housing 210 and to transmit the laser L And is irradiated toward the workpiece 50 side.

In this embodiment, the longitudinal direction of the irradiation housing 310 may be different from the longitudinal direction of the inner housing 210. The longitudinal direction of the irradiation housing 310 may be formed differently depending on the shape of the work 50, the cladding position, and the like.

The reflection mirror 311 is attached to the inner housing 210 and the irradiation housing 310 in the vicinity of the connection portion between the inner housing 210 and the irradiation housing 310, The laser L can be transmitted to the inside of the irradiation housing 310 by switching the direction of movement of the laser L transmitted from the irradiation lens 210. [

In order to prevent foreign matter from flowing into the irradiation housing 310, a protective glass 313 including a transparent material may be attached to the distal end of the irradiation housing 310 in a manner such as a screw connection.

The protective glass 313 is detachably attached to the irradiation housing 310 in a manner such as screw engagement or fitting so as to clean or manage the inside of the irradiation housing 310 or replace the fixed lens unit 330 , The protective glass 313 is removed and the inside of the irradiation housing 310 can be easily opened.

The fixed lens unit 330 is fixed to the irradiation housing 310 in such a manner that the outer circumferential surface thereof is bonded, welded, fixed, etc., and is refracted while the laser L passes. In this embodiment, the fixed lens unit 330 may include a plurality of fixed lenses. Depending on the irradiation position of the laser L, the shape of the irradiation housing 310, and the like, Of course.

6 is a view showing a moving lens unit in a cladding apparatus according to an embodiment of the present invention. Referring to FIG. 6, the moving lens unit 350 is movably provided in the irradiation housing 310, and the laser L passes through it to adjust the focal length of the laser L. The moving lens section 350 includes the moving lens housing 351, the magnet section 353, the moving lens 355 and the lens moving section 357 to move the work 50 and the irradiation housing 310, And the focal length of the laser L is adjusted.

The distance between the workpiece 50 and the irradiation housing 310 can be measured from the distance measuring sensor 90 installed in the irradiation housing 310 or the rotating housing part 200 or the like. The distance measuring sensor 90 may be exemplified by various types of distance measuring apparatuses such as an infrared sensor and an ultrasonic sensor. The distance measuring sensor 90 measures the distance from the rotating shaft of the rotating housing unit 200 to the workpiece 50, To the control unit (not shown), the control unit can operate the moving lens unit 350 to adjust the focal distance of the laser L.

In addition to the method of measuring the distance to the workpiece 50 by the distance measuring sensor 90, the operator first measures the inner diameter and the like of the workpiece 50, and then inputs the corresponding inner diameter into the controller, Or the moving lens unit 350 may be operated by estimating the position of the moving lens 355 from the previously inputted position.

The movable lens housing 351 is accommodated inside the irradiation housing 310 and is coupled to the irradiation housing 310 in a manner such as bolting, welding, or the like. In this embodiment, the movable lens housing 351 is formed in a substantially ring shape and is fitted to the irradiation housing 310.

The magnet portion 353 is coupled to the inner circumferential surface of the moving lens housing 351, and generates a magnetic force including a permanent magnet or the like. In this embodiment, the magnet portion 353 is formed in a ring shape, and a moving lens 355 and a lens moving portion 357 are inserted into the irradiation housing 310 so as to be movable in the longitudinal direction of the irradiation housing 310.

The moving lens 355 is movably inserted into the moving lens housing 351 and refracts the laser L transmitted to the inside of the irradiation housing 310. In this embodiment, the movable lens 355 can apply various shapes such as a convex lens or a concave lens, and refracts the laser L together with the fixed lens unit 330.

The moving lens 355 is coupled to the lens moving part 357 and a magnetic force is applied between the lens moving part 357 and the magnet part 353 when the power is supplied from the outside including the electromagnet and moved in the longitudinal direction of the irradiation housing 310. The moving lens 355 coupled to the lens moving part 357 moves together with the lens moving part 357 since the lens moving part 357 is moved in the longitudinal direction of the irradiation housing 310. [

That is, the focal length of the laser L is adjusted in such a manner that the distance between the movable lens 355 and the fixed lens part 330 is adjusted as the lens moving part 357 moves.

In this embodiment, the moving lens section 350 further includes a moving lens elastic section 359. The movable lens elastic portion 359 is engaged with the movable lens housing 351 and abuts against the lens moving portion 357 and is made of an elastic material so as to elastically support the lens moving portion 357 to move the lens moving portion 357 .

In this embodiment, the movable lens elastic portion 359 is coupled at one end to the movable lens housing 351, and the other end abuts against the lens moving portion 357 to limit the movement of the lens moving portion 357.

The movable lens elastic portion 359 prevents the lens moving portion 357 from being separated from the moving lens housing 351 and increases the speed at which the lens moving portion 357 is restored to the initial position.

The powder spraying part 400 is coupled to the rotating housing part 200 and injects the powder P supplied from the supply channel 100 to the work 50. In this embodiment, the powder spraying unit 400 includes a spraying housing unit 410 and a spray nozzle unit 430.

The spraying housing part 410 is installed in the rotating housing part 200 and receives the powder P from the rotating housing part 200. In this embodiment, the injection housing part 410 is formed in a pipe shape having a hollow inside and has one end connected to the rotation housing part 200 and communicating with the inside of the rotation housing part 200, And is connected to the spray nozzle unit 430.

The spray nozzle unit 430 is coupled to the spray housing unit 410 and allows the powder P delivered from the spray housing unit 410 to be sprayed toward the workpiece 50.

The spray nozzle unit 430 may spray the powder P in a radial direction or in a direction different from the axial direction such as a circumferential direction around the rotational axis of the rotary housing unit 200, The rotation housing part 200 is rotated by a reaction force generated when air or the like is injected.

In this embodiment, the powder spraying unit 400 may be rotatably coupled to the rotating housing unit 200. When the powder injecting section 400 is rotatably coupled to the rotating housing section 200, the position where the laser L irradiated from the laser irradiating section 300 reaches the work 50 and the position where the laser irradiating section 300 reaches the powder injecting section 400, The powder P is rotated relative to the rotating housing part 200 by controlling the angle at which the powder P is injected, It is possible to adjust the position where the workpiece 50 reaches.

A flexible pipe may be used to rotatably couple the powder spraying unit 400 to the rotating housing unit 200 or a rotating pin and a bellows pipe may be provided at a joint portion between the powder spraying unit 400 and the rotating housing unit 200, Etc. can be applied.

7 is a view schematically showing the operation of the rotation restricting part according to an embodiment of the present invention. Referring to Fig. 7, the cladding apparatus 1 further includes a rotation restricting section 500 in this embodiment. The rotation restricting part 500 is installed in the supply channel 100 or the rotation housing part 200 to restrict the rotation of the rotation housing part 200 with respect to the supply channel 100.

That is, in the present embodiment, the rotation housing part 200 is rotated by the reaction force generated when the powder P or the fluid is injected. When the pressure to which the powder P is injected is increased, the rotation housing part 200, The rotating force of the rotating housing part 200 may be excessively increased.

The rotation restricting part 500 includes the rotation restricting housing 510 and the stopper part 530 to restrict the rotation speed of the rotation housing part 200 so as to maintain the cladding quality, (P) and the like, and the accuracy of the laser (L) irradiation.

The rotation restricting housing 510 is formed in a substantially cylindrical shape and is coupled in a manner such as bolting, welding or the like while the supply channel 100 is inserted inward.

The stopper part 530 is coupled to the rotation housing part 200. When the rotation housing part 200 moves, the stopper part 533 moves to the outside of the rotation housing part 200 and contacts the rotation restricting housing 510 Thereby restricting the rotational movement of the rotation housing part 200. [0050] In this embodiment, the stopper portion 530 includes a stopper housing 531, a stopper 533, and a stopper supporting portion 535. [

The stopper housing 531 is coupled to the rotation housing part 200 and is inserted into the rotation restriction housing 510. In this embodiment, the stopper housing 531 is formed in a substantially ring shape, and the rotation housing part 200 is coupled to the inside in such a manner as fitting, screwing, welding, or the like.

In the present embodiment, the stopper housing 531 has a space formed therein to accommodate the stopper 533 and the stopper supporting portion 535, and the rotation limiting housing 510 is spaced apart from the outside.

The stopper housing 531 has a stopper hole 532 formed on the outer circumferential surface thereof so that a stopper 533 which is moved by the centrifugal force protrudes to the outside of the stopper housing 531 through the stopper hole 532, 510).

The stopper 533 is accommodated in the space portion of the stopper housing 531 and is moved by the centrifugal force to enter the stopper hole 532 to press the rotation limiting housing 510, Thereby limiting the rotation of the rotating shaft 200.

The stopper supporting portion 535 is positioned between the stopper 533 and the outer peripheral surface of the stopper housing 531 to elastically support the stopper 533 in a direction away from the outer peripheral surface of the stopper housing 531. [

Accordingly, in the present embodiment, the centrifugal force acting on the stopper portion 530 increases as the rotation speed of the rotation housing portion 200 increases, so that the rotation speed of the rotation housing portion 200 increases The degree of pressing and rubbing of the inner peripheral surface of the rotation limiting housing 510 is further increased.

Therefore, in the present embodiment, the rotation restricting part 500 limits the rotation of the rotation housing part 200 according to the rotation speed of the rotation housing part 200, thereby rotating the rotation housing part 200 within a predetermined speed range. 200 can be rotated.

8 is a cross-sectional view illustrating movement of laser and powder in a cladding device according to an embodiment of the present invention. The operation principle and effects of the cladding device 1 according to an embodiment of the present invention will be described with reference to FIG.

The laser irradiation unit 300 and the powder spraying unit 400 are inserted into the inner space 51 of the work 50 such as a cylinder block of the vehicle. The laser L and the powder P input from the laser supply unit 10 and the powder supply unit 30 are supplied to the inner channel 110 and the outer channel 130 of the supply channel 100, respectively.

The laser L supplied to the inner channel 110 is transmitted to the irradiation housing 310 via the inner housing 210 and passes through the moving lens unit 350 and the fixed lens unit 330 to the work 50 . The focal length of the laser L or the like must be adjusted when the radius of the workpiece 50 or the like is changed. The adjustment of the focal length can be controlled by the moving lens unit 350. [

When the distance from the distance measuring sensor 90 to the workpiece 50 is measured, the controller calculates the focal distance based on the distance to the work 50 or moves from the previously input distance- The position of the lens 355 is estimated, and the moving lens 355 is moved to adjust the focal length.

The powder P supplied between the inner channel 110 and the outer channel 130 enters between the inner housing 210 and the outer housing 230 and is then transferred to the powder spraying unit 400. The powder P delivered to the powder spraying unit 400 is sprayed onto the workpiece 50 via the spraying housing unit 410 and the spray nozzle unit 430.

When the powder P or the like is injected from the injection nozzle unit 430, the reaction force is transmitted to the rotation housing unit 200 through the injection nozzle unit 430 and the injection housing unit 410, .

The cladding apparatus 1 according to the present embodiment rotates the laser irradiating unit 300 and the powder jetting unit 400 using the jetting pressure of the powder P or the fluid injected from the powder jetting unit 400 , It is possible to perform cladding while rotating in a simple configuration without applying a separate rotating device.

The cladding apparatus 1 according to the present embodiment can be realized by applying the moving lens unit 350 to the laser irradiating unit 300 and moving the lens to move the focus of the laser L in accordance with the distance to the workpiece 50 The distance can be adjusted, and the laser (L) irradiation efficiency can be increased.

The cladding apparatus 1 according to the present embodiment includes the rotation limiting unit 500 to limit the rotational speed of the rotating housing unit 200 to prevent breakage of the apparatus and improve cladding quality .

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those of ordinary skill 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. I will understand. Therefore, the technical scope of the present invention should be defined by the following claims.

1: Cladding device 10: Laser supply part
30: Powder supply part 50: Workpiece
51: inner space 70: bearing
90: Distance measuring sensor 100: Supply channel
110: inner channel 111: inner O-ring
130: Outer channel 131: External O-ring
200: rotation housing part 210: inner housing
230: outer housing 250:
251: blade 300: laser irradiation part
310: Irradiation housing 311: Reflecting mirror
313: protective glass 330: fixed lens part
350: Moving lens unit 351: Moving lens housing
353: Magnet part 355: Moving lens
357: lens moving part 359: moving lens elastic part
400: powder spraying part 410: spraying housing part
430: jet nozzle unit 500:
510: rotation limiting housing 530: stopper portion
531: Stopper housing 532: Stopper hole
533; Stopper 535: stopper support
L: laser P: powder

Claims (11)

A supply channel into which powder is input;
A rotatable housing portion rotatably coupled to the supply channel, the rotatable housing portion receiving powder from the supply channel;
A laser irradiation unit coupled to the rotation housing unit and configured to irradiate a laser beam; And
And a powder spraying part coupled to the rotating housing part and spraying powder supplied from the supply channel,
The rotating housing part is rotated by a reaction force generated when the powder is sprayed from the powder spraying part,
A rotation restricting portion installed in the supply channel or the rotation housing portion to limit rotation of the rotation housing portion with respect to the supply channel;
Further comprising a second cladding layer.
The system of claim 1,
An inner channel through which the laser generated in the laser supply unit passes; And
An outer channel which receives powder from the powder supply part and surrounds the inner channel, the powder being moved between the inner channel and the outer channel;
And a cladding layer.
[3] The apparatus of claim 2,
An inner housing for communicating the inner channel and the laser irradiating unit; And
An outer housing that surrounds the inner housing and communicates with the outer channel to transfer powder received from the outer channel to the powder spraying unit;
And a cladding layer.
The connector according to claim 3,
An agglomeration preventing portion having a blade positioned between the inner housing and the outer housing to prevent agglomeration of powders received between the inner housing and the outer housing;
Further comprising a second cladding layer.
The laser irradiation apparatus according to claim 1,
An irradiation housing installed in the rotation housing part and communicating with the rotation housing part to receive a laser from the rotation housing part;
A fixed lens unit fixed to the irradiation housing and through which the laser passes; And
A moving lens unit passing through the laser and movably provided in the irradiation housing;
And a cladding layer disposed on the cladding layer.
6. The zoom lens according to claim 5,
A moving lens housing installed in the irradiation housing;
A magnet unit coupled to the movable lens housing and generating a magnetic force;
A movable lens movably inserted into the movable lens housing; And
A lens moving section coupled to the moving lens and including an electromagnet, the lens moving section being moved in a longitudinal direction of the irradiation housing;
And a cladding layer disposed on the cladding layer.
7. The zoom lens according to claim 6,
A movable lens elastic part coupled to the movable lens housing and contacting the lens moving part and including an elastic material to restrict movement of the lens moving part;
Further comprising a second cladding layer.
The powder sprayer according to any one of claims 1 to 7,
A spray housing part installed in the rotary housing part and receiving powder from the rotary housing part; And
A spray nozzle part coupled to the spray housing part and spraying powder received from the spray housing part;
And a cladding layer disposed on the cladding layer.
delete The apparatus according to claim 1,
A rotation restricting housing coupled to the supply channel; And
A stopper coupled to the rotation housing and frictionally contacting the rotation limiting housing when the rotation speed of the rotation housing is greater than a predetermined speed;
And a cladding layer disposed on the cladding layer.
11. The apparatus according to claim 10,
A stopper housing coupled to the rotation housing portion, the stopper housing being spaced apart from the rotation restriction housing and having a stopper hole formed on an outer circumferential surface thereof;
A stopper accommodated in the stopper housing and moving toward the rotation limiting housing by a centrifugal force when the rotation housing portion is rotated; And
A stopper supporter positioned between the stopper and the outer peripheral surface of the stopper housing to elastically support the stopper;
And a cladding layer disposed on the cladding layer.

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