KR20200089419A - A Head part of Laser cladding equipment - Google Patents

Abstract

The present invention relates to a head part of a laser cladding apparatus and, more specifically, to a head part of a laser cladding apparatus capable of facilitating the supply of powder by preventing the powder from being melted. According to the present invention, the head part of a laser cladding apparatus includes a main head and a powder supply part, wherein the powder supply part includes a nozzle part for spraying powder and the nozzle part includes a powder storage part, a powder guide part, and a cooling channel.

Description

A head part of a laser cladding equipment

The present invention relates to a head portion of a laser cladding device, and more particularly, to a laser cladding device that is easy to supply powder from a powder supply unit.

In general, the components applied to various mechanical devices can have different mechanical properties depending on the purpose of use, and among the techniques different from the mechanical properties, for solving problems occurring on the outer surface of metal such as wear, corrosion, etc. Plating, coating and surface alloying are known as conventional techniques.

However, the conventional metal outer surface processing technology as described above is limited to a specific portion of the metal, and even when mechanical properties are required to be converted, the entire remaining outer surface must be processed at the same time. There is a problem in that the cost due to the consumption of the converted material of the material is increased, and the reprocessing must be performed in consideration of deformations generated during processing.

In addition, the prior art has a problem of causing unsanitary and environmental pollution of the working environment by discharging toxic substances harmful to the human body.

Laser cladding technology may be used to compensate for the problems of the related art. The laser cladding technology adds a base metal and a metal of a different nature to a specific part in order to impart necessary properties such as abrasion resistance, corrosion resistance and heat resistance to the outer surface of the base metal, and then irradiates the laser to dissimilar metal and As a technique of melting and bonding the surface of the base metal, it is possible to form a surface layer capable of blocking the influence from the external environment while maintaining the properties of the base metal.

The laser cladding technology can obtain a metal material having complex properties, and can cope with a shortage of strategic metals that are difficult to provide due to scarcity.

In addition, compared to the conventional plasma metallizing (plasma metallizing) processing, and arc welding (arc welding) processing, the overall heat input is small and local heat treatment is possible, and deformation of the workpiece can be minimized.

As a method of adding dissimilar metals to the base metal by using laser cladding technology, laser cladding may be performed after attaching the surface of the base metal in the form of a metal paste or plate.

In addition, laser cladding may be performed by supplying the laser to the irradiation surface in the form of a metal powder or a metal wire.

When laser irradiation is performed simultaneously with the supply of the dissimilar metal powder, the laser cladding process may be more effective because the amount of dissimilar metal added is easily controlled and the heat absorption rate increases as the surface area absorbing heat of the dissimilar metal increases. have.

In an exemplary embodiment of the prior art according to the above description, an apparatus for performing laser cladding by supplying a metal powder may be configured. The powder-feeding laser cladding device is composed of a laser head that injects laser onto the base material, a powder supply device for supplying the powder onto the base material, a transport gas part for transporting the powder, and a housing that includes and integrates the above components. Can.

The powdered laser cladding technology in which the dissimilar metal is in a powder form forms a molten pool by irradiating a laser to the base metal, injecting a metal powder into the melt pool at a constant speed and simultaneously moving the base metal. To form a continuous clad layer.

However, in such a general laser cladding device, there is a problem in that the powder supplied through the powder supply device is melted in the powder supply unit by the heat source of the laser head described above, and due to the melting of the powder in the unexpected powder supply unit, the powder There is a problem that supply is not easy.

Korean Registered Patent 10-0770748

The problem to be solved by the present invention is to prevent the powder from being melted in the powder supply unit, and an object thereof is to provide a laser cladding device that is easy to supply powder from the powder supply unit.

The objects of the present invention are not limited to the objects mentioned above, and other objects not mentioned will be clearly understood by those skilled in the art from the following description.

In order to solve the above-mentioned problems, the present invention is a main head; And a powder supply part coupled to a certain area of the main head, the powder supply part including a nozzle part for spraying powder, and the nozzle part comprises: a powder storage part located in a certain area of the body part; A powder guide part extending from the powder storage part; And a cooling channel located in the inner region of the body, wherein the cooling channel includes a cooling water inflow path; A cooling path extending from the cooling water inflow path; And a cooling water discharge path extending from the cooling path, wherein the cooling path extends from the cooling water inflow path, extends in a second direction of the body portion, and is located on one side of the body portion; A first horizontal cooling path branched from the first vertical cooling path, extending in a second direction of the body portion, and positioned in an upper region of the powder guide portion; A second horizontal cooling path branched from the first vertical cooling path, extending in a second direction of the body portion, and spaced apart from the first horizontal cooling path by a predetermined distance; A third horizontal cooling path that is branched from the first vertical cooling path, extends in the second direction of the body portion, is spaced apart from the second horizontal cooling path by a predetermined distance, and is located in a lower region of the powder guide portion; And a second vertical cooling path connected to the first horizontal cooling path, the second horizontal cooling path, and the third horizontal cooling path, extending in the first direction of the body portion, and located on the other side of the body portion. It provides a head portion of the laser cladding device, characterized in that.

In addition, the present invention the cooling water inlet path is a cooling water inlet located on one side of the body portion; And a cooling water inflow line extending from the cooling water inlet and extending in the first direction of the body.

In addition, the present invention, the cooling water discharge path, the cooling water discharge line extending from the second vertical cooling path, extending in the first direction of the body portion; And it is located at the end of the cooling water discharge line, it provides a head portion of the laser cladding device including a cooling water discharge port located on the other side of the body portion.

In addition, the present invention, the cooling channel, the first horizontal cooling path side dummy path extending from one end of the first horizontal cooling path to one side of the body portion; A dummy path on the other side of the first horizontal cooling path extending from the other end of the first horizontal cooling path to the other side of the body portion; A first-first closing portion closing one end of the first horizontal cooling path on one side of the dummy path; And a 1-2 closing portion closing the other end of the dummy path on the other side of the first horizontal cooling path, and further extending from one end of the second horizontal cooling path to one side surface of the body portion. One side dummy path; A second dummy path of the second horizontal cooling path extending from the other end of the second horizontal cooling path to the other side of the body portion; A second-closed portion closing one end of the dummy path on one side of the second horizontal cooling path; And a second-second closing portion closing the other end of the second dummy path of the second horizontal cooling path, and further extending from one end of the third horizontal cooling path to one side of the body portion. One side dummy path; A third dummy path of the third horizontal cooling path extending from the other end of the third horizontal cooling path to the other side of the body portion; A 3-1 closing portion closing one end of the dummy path on one side of the third horizontal cooling path; And it provides a head portion of the laser cladding device including a 3-2 closing portion for closing the other end of the dummy path on the other side of the third horizontal cooling path.

In addition, the present invention, the cooling channel, a dummy path on one side of the first vertical cooling path extending from one end of the first vertical cooling path in one longitudinal direction of the body portion; A dummy path on the other side of the first vertical cooling path extending from the other end of the first vertical cooling path in the other longitudinal direction of the body portion; A 4-1 closing portion closing one end of the dummy path on one side of the first vertical cooling path; And a 4-2 closing portion for closing the other end of the dummy path on the other side of the first vertical cooling path, and further extending from one end of the second vertical cooling path in the longitudinal direction of the body portion. A dummy path on one side of the path; A dummy path on the other side of the second vertical cooling path extending from the other end of the second vertical cooling path in the other longitudinal direction of the body portion; A 5-1 closing portion closing one end of the dummy path on one side of the second vertical cooling path; And it provides a head portion of the laser cladding device including a 5-2 closing portion for closing the other end of the second dummy path of the second vertical cooling path.

In addition, the present invention, the nozzle unit, a powder supply channel for supplying powder to the powder storage unit; And a gas supply channel for transporting powder supplied from the powder supply channel, wherein the powder supply channel and the gas supply channel are configured in a "y" shape to provide a head portion of the laser cladding device. .

In addition, the present invention, the powder supply channel includes a powder inlet and a powder outlet through which the powder introduced into the powder inlet is discharged, the powder inlet is located in the upper region of the body, and the powder outlet is the powder storage It provides a head portion of the laser cladding device, characterized in that to supply the powder to the powder storage unit in communication with the unit.

In addition, the present invention, the gas supply channel includes a gas inlet and a gas outlet through which gas introduced into the gas inlet is discharged, wherein the gas inlet is located in an upper region of the body, and the gas outlet is supplied with the powder In communication with a certain path of the channel, the gas discharged from the gas discharge portion provides a head portion of the laser cladding device characterized in that it flows into the powder supply channel.

In addition, the present invention provides the head portion of the laser cladding device, characterized in that the powder inlet and the gas inlet are spaced apart at regular intervals, as the powder inlet and the gas inlet are located in the upper region of the body. do.

In addition, the present invention provides a head portion of the laser cladding device, characterized in that the powder supply channel, with the metal powder, N ₂ gas is additionally introduced.

In addition, the present invention, the nozzle portion, a powder guide portion extending from the powder storage portion; And it provides a head portion of the laser cladding device including a powder injection portion extending from the powder guide portion.

In addition, the present invention, the powder guide portion, extending from the powder storage portion, a guide groove having a width narrower than the width of the powder storage portion; A guide wall positioned inside the guide groove and partitioning the guide groove; And it provides a head portion of the laser cladding device including a powder moving portion located between the guide wall.

According to the present invention as described above, by arranging the cooling path in a form surrounding the powder guide part, it is possible to prevent the powder from being melted in the powder supply part and facilitate supply of the powder.

In addition, in the present invention, by disposing the cooling path in a form surrounding the powder guide portion, by maintaining a uniform temperature distribution in the entire area of the powder guide portion, the powder sprayed through the powder guide portion is uniform throughout Can be sprayed.

In addition, in the present invention, the powder supply channel and the gas supply channel are in communication with each other, and the powder supply channel and the gas supply channel are configured in an overall form of "y" to provide a laser cladding device having excellent powder supply efficiency. Can.

1A is a combined perspective view showing a head portion of a laser cladding device according to the present invention, and FIG. 1B is an exploded perspective view showing a head portion of a laser cladding device according to the present invention.
2A and 2B are schematic views showing a nozzle part of a powder supply part according to the present invention.
3A is a schematic plan view showing a nozzle unit including a cooling channel according to the present invention.
3B is a schematic view for explaining a dummy path and a closed portion according to the present invention.
4 is a real picture showing a head portion of the laser cladding device according to the present invention.
5A to 5C are schematic perspective views showing various types of cooling channels.
FIG. 6A is a view showing cooling efficiency in the structure of the cooling channel of FIG. 5A, FIG. 6B is a view showing cooling efficiency in the structure of the cooling channel of FIG. 5B, and FIG. 6C is a structure of cooling channel of FIG. 5C It is a diagram showing the cooling efficiency in.
7A to 7C are schematic perspective views showing various types of powder supply parts.
Figure 8a is a view showing the powder supply efficiency in the structure of the powder supply unit of Figure 7a, Figure 8b is a view showing the powder supply efficiency in the structure of the powder supply unit of Figure 7b, Figure 8c is a powder supply unit of Figure 7c It is a diagram showing the powder supply efficiency in the structure of.

Advantages and features of the present invention, and methods for achieving them will be clarified with reference to embodiments described below in detail together with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but will be implemented in various different forms, and only the present embodiments allow the disclosure of the present invention to be complete, and the general knowledge in the technical field to which the present invention pertains. It is provided to fully inform the holder of the scope of the invention, and the invention is only defined by the scope of the claims.

Hereinafter, specific contents for carrying out the present invention will be described in detail with reference to the accompanying drawings. The same reference numerals refer to the same components regardless of the drawings, and "and/or" includes each and every combination of one or more of the mentioned items.

Although the first, second, etc. are used to describe various components, it goes without saying that these components are not limited by these terms. These terms are only used to distinguish one component from another component. Therefore, it goes without saying that the first component mentioned below may be the second component within the technical spirit of the present invention.

The terminology used herein is for describing the embodiments and is not intended to limit the present invention. In the present specification, the singular form also includes the plural form unless otherwise specified in the phrase. As used herein, “comprises” and/or “comprising” does not exclude the presence or addition of one or more other components other than the components mentioned.

Unless otherwise defined, all terms (including technical and scientific terms) used in the present specification may be used as meanings commonly understood by those skilled in the art to which the present invention pertains. In addition, terms defined in the commonly used dictionary are not ideally or excessively interpreted unless specifically defined.

The spatially relative terms “below”, “beneath”, “lower”, “above”, “upper”, etc., are as shown in the figure. It can be used to easily describe a correlation between a component and other components. The spatially relative terms should be understood as terms including different directions of components in use or operation in addition to the directions shown in the drawings. For example, when a component shown in the drawing is turned over, a component described as "below" or "beneath" of another component will be placed "above" the other component. Can. Thus, the exemplary term “below” can include both the directions below and above. Components can also be oriented in different directions, and thus spatially relative terms can be interpreted according to orientation.

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

1A is an exploded perspective view showing a head portion of a laser cladding device according to the present invention, and FIG. 1B is an exploded perspective view showing a head portion of a laser cladding device according to the present invention.

1A and 1B, the head portion 100 of the laser cladding device according to the present invention includes a main head 120 to which a laser beam is irradiated, and a shielding cap for protecting the main head 120 ( Shielding Cap, 110). However, in the present invention, the presence or absence of the shielding cap (Shielding Cap 110) is not limited.

The main head 120 may irradiate a square laser beam or a line laser beam, and through the laser beam, a molten pool is formed by melting a metal powder provided to a base metal (not shown). can do.

In addition, the head portion 100 of the laser cladding device according to the present invention includes a powder supply portion 200 coupled to a certain area of the main head 120.

At this time, the powder supply unit 200 may be located on the first side of the main head 120 and the second side opposite to the first side, respectively, but the powder supply unit 200 of the present invention The number is not limited.

More specifically, the powder supply part 200 includes a nozzle part 230 for spraying metal powder, and a nozzle plate 220 for opening and closing a certain surface of the nozzle part 230.

On the other hand, the powder supply unit 200 is fastened to the main head 120, the nozzle plate 220 is fastened to a certain surface of the main head 120, the powder supply unit to the main head 120 200 may be fastened, but the present invention is not limited to these fastening methods.

Hereinafter, the powder supply unit according to the present invention will be described in more detail.

2A and 2B are schematic views showing a nozzle part of a powder supply part according to the present invention.

Meanwhile, as described above, the powder supply unit according to the present invention includes a nozzle unit 230 for spraying metal powder, a nozzle plate 220 for opening and closing a certain surface of the nozzle unit 230, and the nozzle plate ( The shape of 220) corresponds to a simple plate shape, and the shape is not limited.

Therefore, the powder supply unit 200 in the present invention is substantially characterized by the nozzle unit 230, and will be described below in detail with respect to the nozzle unit of the powder supply unit.

2A and 2B, the nozzle part 230 of the powder supply part according to the present invention includes a body part 231, and is formed at one end of the body part 231, for example, an upper end part. A reference step portion 232 is included.

The reference step portion 232 is for presenting a reference for the nozzle plate 220 to be located on the nozzle portion 230, the reference step portion 232 is a higher step than the body portion 231 Have.

However, in the present invention, since the reference step portion 232 is for presenting a reference for the nozzle plate 230 to be located on the nozzle portion 230, the presence or absence of the reference step portion 232 in the present invention It is not limiting.

That is, in the present invention, even if it is not the reference step portion 232, since the nozzle plate 230 can be positioned on the nozzle portion 230, the reference step portion 232 may be omitted.

2A and 2B, the nozzle part 230 of the powder supply part according to the present invention includes a nozzle plate fastening part 233 located on one surface of the body part 231, wherein One surface of the body portion 231 may be defined as an upper surface of the body portion 231.

In addition, the nozzle plate fastening portion 233 includes a nozzle plate contact surface 233a in contact with the nozzle plate and a nozzle plate arrangement portion 233b in which the nozzle plate 220 is located.

That is, while the nozzle plate 220 is in contact with the nozzle plate contact surface 233a, it is located in the nozzle plate arrangement portion 233b and may be located in the nozzle plate fastening portion 233.

On the other hand, the nozzle plate 220 is located in the nozzle plate fastening portion 233, through the fastening hole 234, the nozzle plate 220 and the nozzle portion 230 can be fastened.

The fastening may be fastened through a known fastening means, and the fastening means are not limited in the present invention, and the fastening method of the nozzle plate 220 and the nozzle unit 230 is not limited.

Subsequently, referring to FIGS. 2A and 2B, the nozzle unit 230 of the powder supply unit according to the present invention includes a powder storage unit 235 and a powder storage unit located in a certain area of the body unit 231. 235) and a powder guide part 236 extending from the powder guide part 236 and a powder spraying part 237 extending from the powder guide part 236.

The powder storage part 235 is formed in a certain area of the body part 231, for example, an intaglio area in the center area, that is, in the form of a groove formed to a certain depth from the nozzle plate contact surface 233a. do.

In addition, in the powder storage unit 235, powder supplied from a powder supply feeder (not shown) is primarily stored. At this time, the powder supplied from the powder supply feeder (not shown) to the powder storage unit 235 is It will exist without a certain directionality.

At this time, the powder that is present without a certain directionality is moved to the powder guide part 236, so that the directionality of one direction is present. Therefore, the powder guide part 236 allows the powder that is present without directionality to have one directionality. To help, you will guide the powder.

Accordingly, the powder guide part 236 in the present invention is formed in a line-shaped intaglio region, that is, in the form of a groove formed to a certain depth from the nozzle plate contact surface 233a.

More specifically, the powder guide portion 236 extends from the powder storage portion 235 and includes a guide groove 236a having a width narrower than the width of the powder storage portion, and the guide groove 236a is the powder The powder having no directionality in the storage unit 235 is aligned in one direction to set the supply direction of the powder, so that uniform powder can be supplied.

In addition, the powder guide portion 236 is located inside the guide groove 236a, and includes a guide wall 236b partitioning the guide groove 236a, which is located between the guide walls 236b. It includes a powder moving portion (236c).

That is, by the guide groove 236a having a width narrower than the width of the powder storage unit, it is possible to align the powder having no directionality in the powder storage unit 235 in one direction to set the supply direction of the powder. In order to more effectively set the supply direction of the powder, the direction of movement of the powder is set through the guide wall 236b that partitions the guide groove 236a, and the powder is powder located between the guide walls 236b. It can move through the moving part 236c.

Subsequently, referring to FIGS. 2A and 2B, the nozzle 230 of the powder supply unit according to the present invention, the powder guided by the powder guide unit 236 to have unidirectionality, the powder injection unit 237 It is finally sprayed through.

That is, through the powder injection portion 237 extending from the powder guide portion 236, the powder is finally sprayed, and the powder having one directionality by the powder guide portion, the powder injection portion 237 Since it has one directionality while being sprayed through, it is possible to supply a uniform powder in the present invention.

On the other hand, as described above, in the general laser cladding device, there is a problem that the powder supplied through the powder supply unit is melted in the powder supply unit by the heat source of the laser head described above.

More specifically, as described above, for example, the powder guided to have unidirectionality by the powder guide unit 236 is finally sprayed through the powder injection unit 237, wherein the powder is In the path passing through the powder guide part 236, the powder has a problem of being melted in the powder guide part 236 by a heat source of the laser head, and due to the melting of the powder in this unexpected powder supply part, the powder There is a problem in that the nozzle of the supply part is clogged, and thus the supply of powder is not easy.

Therefore, in the present invention, the cooling channel as described later is applied to the nozzle unit 230 according to the present invention.

Hereinafter, the cooling channel according to the present invention will be described in detail.

3A is a schematic plan view showing a nozzle unit including a cooling channel according to the present invention.

On the other hand, the cooling channel shown in Figure 3a, which is located in the inner region of the body portion 231, in practice the cooling channel is not exposed on the top of the nozzle portion, for convenience of description, in Figure 3 the cooling channel The morphology is plotted.

In this case, the inner region of the body portion 231 may mean within the thickness range of the body portion 231.

Referring to Figure 3a, the cooling channel of the nozzle unit 230 according to the present invention, the cooling water inlet path 310; A cooling path 400 extending from the cooling water inflow path 310; And a cooling water discharge path 320 extending from the cooling path 400.

More specifically, first, the cooling water inflow path 310 includes a cooling water inlet 311 located on one side of the body portion 231; And a cooling water inflow line 312 extending from the cooling water inlet 311 and extending in a first direction of the body portion 231.

In this case, the first direction of the body portion 231 may be the width direction of the body portion (X direction in FIG. 3 ), or the first direction of the body portion 231 may be defined as a horizontal direction.

Next, the cooling path 400 extends from the cooling water inflow line 312, extends in the second direction of the body portion 231, and is a first vertical cooling path 410 located on one side of the body portion. It includes.

In this case, the second direction of the body portion 231 may be the longitudinal direction of the body portion (Y direction in FIG. 3 ), or the second direction of the body portion 231 may be defined as a vertical direction.

In addition, the cooling path 400 is branched from the first vertical cooling path 410, extends in the second direction of the body portion 231, and is located in an upper region of the powder guide portion 236. It includes a first horizontal cooling path 420.

In addition, the cooling path 400 is branched from the first vertical cooling path 410, extends in the second direction of the body portion 231, and is spaced apart from the first horizontal cooling path 420 by a predetermined interval. A second horizontal cooling path 430 which is disposed by; And branching from the first vertical cooling path 410, extending in the second direction of the body portion 231, being spaced apart from the second horizontal cooling path 430 by a predetermined distance, and the powder guide portion ( 236) includes a third horizontal cooling path 440 located in the lower region

In addition, the cooling path 400 is connected to the first horizontal cooling path 420, the second horizontal cooling path 430, and the third horizontal cooling path 440, the body portion 231 It extends in the first direction and includes a second vertical cooling path 450 located on the other side of the body portion.

That is, as shown in Figure 3a, the cooling path 400 according to the present invention, the first vertical cooling path 410, the first horizontal cooling path 420, the second horizontal cooling path 430 , The third horizontal cooling path 440 and the second vertical cooling path 450 are continuously arranged, and through this, may be disposed in a form surrounding the powder guide part 236.

Through this, that is, by the cooling path 400 is disposed in a form surrounding the powder guide portion 236, the cooling path 400, it is possible to lower the temperature of the powder guide portion 236 No, it is possible to maintain a uniform temperature distribution in the entire area of the powder guide part 236.

As described above, in a general laser cladding device, in the path where the powder passes through the powder guide part 236, the powder is melted in the powder guide part 236 by a heat source of the laser head, Due to the unexpected melting of the powder in the powder supply unit, there is a problem that the supply of the powder is not easy.

However, in the present invention, by disposing the cooling path 400 in a form surrounding the powder guide part 236, it is possible to prevent powder from being melted in the powder supply part and facilitate supply of the powder.

In addition, in the present invention, the cooling path 400 is disposed in a form surrounding the powder guide part 236, thereby maintaining a uniform temperature distribution in the entire area of the powder guide part 236, The powder sprayed through the powder guide part 236 may be uniformly sprayed as a whole.

Next, the cooling water discharge path 320 extends from the second vertical cooling path 450 of the cooling path 400, and the cooling water discharge line 322 extending in the first direction of the body portion 231. ); And a cooling water discharge port 321 located at an end of the cooling water discharge line 322 and located at the other side of the body portion 231.

That is, in the present invention, the cooling water introduced through the cooling water inlet 311 is introduced into the cooling path 400 through the cooling water inlet line 312, and after cooling the powder guide part 236 , Moving along the cooling water discharge line 322, may be finally discharged through the cooling water discharge port (321).

Meanwhile, the cooling path according to the present invention may include the following dummy paths and closures.

3B is a schematic view for explaining a dummy path and a closed portion according to the present invention.

Meanwhile, in FIG. 3B, for convenience of description, reference numerals in FIG. 3A are omitted and illustrated.

Referring to FIG. 3B, the cooling channel according to the present invention includes a dummy path 421a on one side of the first horizontal cooling path extending from one end of the first horizontal cooling path 420 to one side of the body portion 231. ; And a dummy path 421b on the other side of the first horizontal cooling path extending from the other end of the first horizontal cooling path 420 to the other side of the body portion 231, and a dummy path on one side of the first horizontal cooling path. A first-first closing portion 422a closing one end of 421a; And a first-second closing portion 422b closing the other end of the dummy path 421b on the other side of the first horizontal cooling path.

In addition, in the same way, the cooling channel according to the present invention is a dummy path 431a on one side of the second horizontal cooling path extending from one end of the second horizontal cooling path 430 to one side of the body portion 231. ); And a dummy path 431b on the other side of the second horizontal cooling path extending from the other end of the second horizontal cooling path 430 to the other side of the body portion 231, and a dummy path on one side of the second horizontal cooling path. A second-closed portion 432a closing one end of 431a; And a second-second closing portion 432b closing the other end of the second horizontal cooling path dummy path 431b.

In addition, in the same way, the cooling channel according to the present invention, a third horizontal cooling path dummy path 441a extending from one end of the third horizontal cooling path 440 to one side of the body portion 231 ); And a third dummy path 441b of the third horizontal cooling path extending from the other end of the third horizontal cooling path 440 to the other side of the body portion 231, and a dummy path of one side of the third horizontal cooling path. A 3-1 closed portion 442a closing one end of the 441a; And a 3-2 closing portion 442b closing the other end of the dummy path 441b on the other side of the third horizontal cooling path.

Subsequently, referring to FIG. 3B, the cooling channel according to the present invention is one side of the first vertical cooling path extending from one end of the first vertical cooling path 410 in the longitudinal direction of the body portion 231 Path 411a; And a dummy path 411b on the other side of the first vertical cooling path extending from the other end of the first vertical cooling path 410 in the longitudinal direction of the other side of the body portion 231, and a dummy on one side of the first vertical cooling path. A 4-1 closing portion 411a closing one end of the path 411a; And a 4-2 closing portion 422b closing the other end of the first dummy path 411b on the first vertical cooling path.

In addition, in the same way, the cooling channel according to the present invention, a dummy path on one side of the second vertical cooling path extending from one end of the second vertical cooling path 450 in the longitudinal direction of the body portion 231 ( 451a); And a dummy path 451b on the other side of the second vertical cooling path extending from the other end of the second vertical cooling path 450 in the longitudinal direction of the other side of the body portion 231, and a dummy on one side of the second vertical cooling path. A 5-1 closing portion 451a closing one end of the path 451a; And a 5-2th closing portion 452b closing the other end of the second dummy path 451b on the second vertical cooling path.

The reasons for including such dummy paths and closures in the present invention are as follows.

More specifically, in order to form a cooling channel in FIG. 3A as described above, in the present invention, the above-described cooling channel is formed by a drilling method. For example, in order to form a first horizontal cooling path, A cooling path is formed by a drilling method from one side surface of the body portion 231 to the other side surface of the body portion 231.

However, in this case, in addition to the first horizontal cooling path 420 of FIG. 3A described above, the dummy path 421a on one side of the first horizontal cooling path of FIG. 3B and the dummy path 421b on the other side of the first horizontal cooling path. Is also formed at the same time.

At this time, since the cooling water is discharged by the dummy path 421a on one side of the first horizontal cooling path and the dummy path 421b on the other side of the first horizontal cooling path, in the present invention, the dummy path on one side of the first horizontal cooling path ( 421a) a first-first closing portion 422a closing one end; And a 1-2 closed portion 422b closing the other end of the first dummy path 421b on the other side of the first horizontal cooling path, thereby dummy path 421a on the one side of the first horizontal cooling path and the first horizontal cooling. By the dummy path 421b on the other side of the path, it is possible to prevent the cooling water from being discharged.

Since the same can be applied to the second horizontal cooling path, the third horizontal cooling path, the first vertical cooling path and the second vertical cooling path, detailed descriptions thereof will be omitted.

4 is a real picture showing a head portion of the laser cladding device according to the present invention.

As shown in FIG. 4, the head portion 100 of the laser cladding device according to the present invention includes a powder supply portion 200 coupled to a certain area of the main head 120.

At this time, the cooling path according to the present invention, the first horizontal cooling path one-side closing portion (422a) for closing one end of one side of the dummy path (421a); And a 1-2 closing portion 422b closing the other end of the dummy path 421b on the other side of the first horizontal cooling path, and further comprising one end of the dummy path 431a on one side of the second horizontal cooling path. A closing 2-1 closing portion 432a; And a second-second closing portion 432b closing the other end of the second horizontal cooling path dummy path 431b, and also one end of the third horizontal cooling path dummy path 441a. A closing 3-1 closing portion 442a; And a 3-2 closing portion 442b closing the other end of the third horizontal cooling path dummy path 441b.

In addition, the cooling path according to the present invention, the first vertical cooling path, a 4-1 closing portion 411a closing one end of one side of the dummy path 411a; And a 4-2 closing portion 422b closing the other end of the dummy path 411b on the other side of the first vertical cooling path, and closing one end of the dummy path 451a on the second vertical cooling path. A 5-1 closed part 451a; And a 5-2th closing portion 452b closing the other end of the second dummy path 451b on the second vertical cooling path.

5A to 5C are schematic perspective views showing various types of cooling channels.

At this time, FIG. 5A shows a case in which the cooling channel includes only the third horizontal cooling path as described above among the horizontal cooling paths, and FIG. 5B shows the second horizontal as described above among the horizontal cooling paths of the cooling channels. A case where only the cooling path and the third horizontal cooling path are included is illustrated, and FIG. 5C shows a case in which the cooling channel includes the first horizontal cooling path to the third horizontal cooling path as described above. City.

Meanwhile, for the above-described FIGS. 5A to 5C, cooling efficiency was measured through an experiment.

FIG. 6A is a view showing cooling efficiency in the structure of the cooling channel of FIG. 5A, FIG. 6B is a view showing cooling efficiency in the structure of the cooling channel of FIG. 5B, and FIG. 6C is a structure of cooling channel of FIG. 5C It is a diagram showing the cooling efficiency in.

In FIGS. 6A to 6C, temperatures in nine regions were measured, and measurement results are shown in FIGS. 6A to 6C, respectively.

Referring to Figures 6a to 6c, the structure of Figure 5a and the structure of Figure 5b it can be seen that the overall shows a non-uniform temperature distribution, in particular, shows a temperature distribution of about 580K to 622K, the cooling efficiency is not good Can be confirmed.

However, in the structure of FIG. 5C, it can be seen that the overall temperature distribution is uniform, and the temperature range is also less than 58K, so that the overall cooling efficiency can be confirmed.

Therefore, in the present invention, by disposing the cooling path 400 in a form surrounding the powder guide part 236, it is possible to prevent powder from being melted in the powder supply part and facilitate supply of the powder.

In addition, in the present invention, the cooling path 400 is disposed in a form surrounding the powder guide part 236, thereby maintaining a uniform temperature distribution in the entire area of the powder guide part 236, The powder sprayed through the powder guide part 236 may be uniformly sprayed as a whole.

On the other hand, in a general laser cladding device, a powder supply channel for supplying powder and a transport gas supply channel for supplying transport gas are composed of a single channel, and powder and transport gas are supplied through a single channel, thereby There is a problem that supply is not easy.

Accordingly, the present invention is to provide a laser cladding device having excellent powder supply efficiency through the following structure.

That is, referring to FIGS. 2A and 2B, the nozzle unit 230 of the powder supply unit according to the present invention includes a powder supply channel 240 for supplying powder to the powder storage unit 235 and the powder supply channel ( It includes a gas supply channel 250 for transporting the powder supplied from (240).

More specifically, the powder supply channel 240 includes a powder inlet 241 and a powder outlet 242 through which powder introduced into the powder inlet 241 is discharged, wherein the powder inlet ( 241) is located in the upper region of the body portion 231, can be supplied with powder from a separate powder supply device (not shown), the powder discharge unit 242 is in communication with the powder storage unit 235 It is possible to supply the powder to the powder storage unit 235.

In this case, the powder supply channel 240 may additionally introduce N ₂ gas for smooth flow of the powder together with the metal powder.

In addition, the gas supply channel 250 includes a gas inlet 251 and a gas outlet 252 through which gas introduced into the gas inlet 251 is discharged, wherein the gas inlet 251 Is located in the upper region of the body portion 231, can be supplied with gas from a separate gas supply device (not shown).

In addition, the gas discharge unit 252 is in communication with a certain path of the powder supply channel 240, the gas discharged from the gas discharge unit 252 is introduced into the powder supply channel 240, the gas And the powder may be mixed with each other.

At this time, the gas may be argon gas, and through the argon gas, as well as to facilitate the transfer of powder, through the inert gas argon gas, it is possible to form an excellent welding bead.

On the other hand, the powder inlet 241 and the gas inlet 251 is located in the upper region of the body portion 231, the powder inlet 241 and the gas inlet 251 is a predetermined interval They can be spaced apart.

That is, the nozzle unit 230 of the powder supply unit according to the present invention, to transfer the powder supplied from the powder supply channel 240 and the powder supply channel 240 for supplying powder to the powder storage unit 235 It includes a gas supply channel 250, wherein, the powder supply channel 240 and the gas supply channel 250 may be configured as a "y" as a whole.

7A to 7C are schematic perspective views showing various types of powder supply parts.

At this time, FIG. 7A shows a powder supply unit having a general structure, and more specifically, a powder supply channel for supplying powder and a gas supply channel for supplying transport gas are configured as a single channel.

In addition, FIG. 7B shows a powder supply unit composed of two channels in which a powder supply channel for supplying powder and a gas supply channel for supplying transport gas are provided. However, the powder supply channel and the gas supply channel are not communicated with each other. It shows the form of supplying powder and gas to the powder storage unit as described above.

In addition, FIG. 7c shows a powder supply unit according to the present invention, and in FIG. 7c, the powder supply channel and the gas supply channel communicate with each other, so that the powder supply channel and the gas supply channel are generally configured in a "y" form. City.

Meanwhile, the powder supply efficiency was measured through the simulation experiments of FIGS. 7A to 7C described above.

More specifically, the powder supply efficiency when the powder introduced into the powder supply channel was finally sprayed into the powder injection unit was measured, and in the state where powder of 1000 particles flowed into the powder supply channel, the powder was injected into the powder injection unit. The number of particles injected was measured.

Figure 8a is a view showing the powder supply efficiency in the structure of the powder supply unit of Figure 7a, Figure 8b is a view showing the powder supply efficiency in the structure of the powder supply unit of Figure 7b, Figure 8c is a powder supply unit of Figure 7c It is a diagram showing the powder supply efficiency in the structure of.

8A to 8C, in the structure of FIG. 7A, 613 particles among 1000 particles were finally sprayed through the powder injection unit, and in the structure of FIG. 7B, 608 particles of 1000 particles were finally passed through the powder injection unit. In FIG. 7C, it can be seen that 684 particles out of 1000 particles were finally sprayed through the powder injection unit.

That is, in the form in which the powder supply channel and the gas supply channel according to the present invention are in communication with each other, and the powder supply channel and the gas supply channel are entirely configured in a "y" form, 684 particles are finally injected through the powder injection unit, 7A of the general structure, that is, the powder supply channel for supplying the powder and the gas supply channel for supplying the transport gas can be confirmed that the powder supply efficiency is better than the single channel configuration.

In addition, in the case of the powder supply unit according to the present invention, FIG. 7B, that is, the powder supply channel and the gas supply channel are not in communication with each other, and the powder supply than the case where the powder and gas are respectively supplied to the powder storage unit as described above. It can be confirmed that the efficiency is more excellent, and even if a separate gas supply channel is provided, it can be confirmed that the powder supply efficiency in the form of a powder supply unit according to the present invention is excellent.

According to the present invention as described above, the powder supply channel and the gas supply channel are in communication with each other, and the powder supply channel and the gas supply channel are configured in an entirely "y" form, thereby providing a laser cladding device having excellent powder supply efficiency. Can provide.

Although the embodiments of the present invention have been described with reference to the above and the accompanying drawings, those skilled in the art to which the present invention pertains can implement the present invention in other specific forms without changing its technical spirit or essential features. You will understand that there is. Therefore, it should be understood that the embodiments described above are illustrative in all respects and not restrictive.

Claims (8)

Main head; And
It includes a powder supply unit coupled to a certain area of the main head,
The powder supply unit includes a nozzle unit for spraying powder,
The nozzle unit, the powder storage unit located in a certain area of the body; A powder guide part extending from the powder storage part; And a cooling channel located in the inner region of the body portion,
The cooling channel, the cooling water inlet path; A cooling path extending from the cooling water inflow path; And a cooling water discharge path extending from the cooling path,
The cooling path includes: a first vertical cooling path extending from the cooling water inflow path, extending in a second direction of the body portion, and positioned on one side of the body portion; A first horizontal cooling path branched from the first vertical cooling path, extending in a second direction of the body portion, and positioned in an upper region of the powder guide portion; A second horizontal cooling path branched from the first vertical cooling path, extending in the second direction of the body portion, and spaced apart from the first horizontal cooling path by a predetermined distance; A third horizontal cooling path that is branched from the first vertical cooling path, extends in the second direction of the body portion, is spaced apart from the second horizontal cooling path by a predetermined distance, and is located in a lower region of the powder guide portion; And a second vertical cooling path connected to the first horizontal cooling path, the second horizontal cooling path, and the third horizontal cooling path, extending in the first direction of the body portion, and located on the other side of the body portion. Head portion of the laser cladding device, characterized in that. According to claim 1,
The cooling water inflow path is a cooling water inlet located on one side of the body portion; And a cooling water inflow line extending from the cooling water inlet and extending in a first direction of the body portion. According to claim 2,
The cooling water discharge path includes: a cooling water discharge line extending from the second vertical cooling path and extending in a first direction of the body portion; And a cooling water discharge port located at an end of the cooling water discharge line and located at the other side surface of the body part. According to claim 1,
The cooling channel,
A dummy path on one side of the first horizontal cooling path extending from one end of the first horizontal cooling path to one side of the body portion; A dummy path on the other side of the first horizontal cooling path extending from the other end of the first horizontal cooling path to the other side of the body portion; A first-first closing portion closing one end of the first horizontal cooling path on one side of the dummy path; And a first-second closing part closing the other end of the dummy path on the other side of the first horizontal cooling path,
In addition, a dummy path on one side of the second horizontal cooling path extending from one end of the second horizontal cooling path to one side of the body portion; A second dummy path of the second horizontal cooling path extending from the other end of the second horizontal cooling path to the other side of the body portion; A second-closed portion closing one end of the dummy path on one side of the second horizontal cooling path; And a second-second closing portion that closes the other end of the dummy path on the other side of the second horizontal cooling path,
In addition, a dummy path on one side of the third horizontal cooling path extending from one end of the third horizontal cooling path to one side surface of the body portion; A third dummy path of the third horizontal cooling path extending from the other end of the third horizontal cooling path to the other side of the body portion; A 3-1 closing portion closing one end of the dummy path on one side of the third horizontal cooling path; And a 3-2 closing portion closing the other end of the dummy path on the other side of the third horizontal cooling path. The method of claim 3,
The cooling channel,
A dummy path on one side of the first vertical cooling path extending from one end of the first vertical cooling path in a longitudinal direction of the body portion; A dummy path on the other side of the first vertical cooling path extending from the other end of the first vertical cooling path in the other longitudinal direction of the body portion; A 4-1 closing portion closing one end of the dummy path on one side of the first vertical cooling path; And a 4-2 closing portion closing the other end of the dummy path on the other side of the first vertical cooling path.
In addition, a dummy path on one side of the second vertical cooling path extending from one end of the second vertical cooling path in a longitudinal direction of the body portion; A dummy path on the other side of the second vertical cooling path extending from the other end of the second vertical cooling path in the other longitudinal direction of the body portion; A 5-1 closing portion closing one end of the dummy path on one side of the second vertical cooling path; And a 5-2 closing portion that closes the other end of the dummy path on the other side of the second vertical cooling path. According to claim 1,
The nozzle unit, a powder supply channel for supplying powder to the powder storage unit; And a gas supply channel for transporting powder supplied from the powder supply channel.
The powder supply channel and the gas supply channel is a head portion of the laser cladding device, characterized in that configured in the "y" form. The method of claim 6,
The powder supply channel includes a powder inlet and a powder outlet through which powder introduced into the powder inlet is discharged,
The powder inlet portion is located in the upper region of the body portion, the powder discharge portion is in communication with the powder storage portion, the head portion of the laser cladding device characterized in that to supply the powder to the powder storage portion. The method of claim 7,
The gas supply channel includes a gas inlet and a gas outlet through which gas introduced into the gas inlet is discharged.
The gas inlet portion is located in the upper region of the body portion, the gas outlet portion is in communication with a certain path of the powder supply channel, the gas discharged from the gas outlet, laser cladding, characterized in that flowing into the powder supply channel Head of the device.

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