KR101516884B1 - High frequency arc metal spray system and method of arc spray using the same - Google Patents

Abstract

A high frequency arc spraying system is provided. The high-frequency arc spraying system includes a wire guide portion for guiding metal wires, a high-frequency power source for supplying a high-frequency current to the metal wires, and a high-frequency power source for compressing the metal wires melted by the arc generated by the high- And a central injection nozzle for injecting air.

Description

TECHNICAL FIELD The present invention relates to a high frequency arc spraying system and an arc spraying method using the same,

The present invention relates to a high frequency arc spraying system and an arc spraying method using the same, and more particularly, to an arc spraying system using a high frequency current and an arc spraying method using the same.

Arc arc spraying is a technique in which arc heat is generated between two metal wires to scatter metal wire melted by arc heat with compressed air to deposit on the surface of the work.

Since the molten metal wire is directly heated by arc heat, it has high heat efficiency and high adhesion to materials, and is widely used in various fields requiring metal coating.

As disclosed in Korean Patent Laid-Open Publication No. 2003-0085391 (Application No. 10-2002-0023803), a coating arc spraying system configured to enable a continuous arc spraying operation using a wire feeder that a worker can grasp on the back is developed .

Since the molten metal wire is scattered along the feeding direction of the compressed air, depending on how the compressed air is supplied in a certain direction, the molten metal wire may be cone-shaped and densely applied, or may be thickly applied only to a part of the material . In addition, depending on the shape of the material, it may be possible to coat the molten metal wire in an elliptical shape to increase the arc spraying efficiency.

Further, when the heat generated by the arc is low, the metal wire rod can not be sufficiently melted, and the melted metal wire rod can not be densely applied to the cone.

Accordingly, there is a need for research and development of various methods for increasing the temperature of heat generated by the arc and supplying compressed air to the metal wires that have been adaptively melted according to the external working environment.

SUMMARY OF THE INVENTION The present invention provides a high-frequency arc spraying system and an arc spraying method using the same.

Another object of the present invention is to provide a high-frequency arc spraying system and an arc spraying method using the same.

It is another object of the present invention to provide a high frequency arc spraying system with improved working efficiency and an arc spraying method using the same.

Another aspect of the present invention is to provide a high frequency arc spraying system for spraying compressed air onto a molten metal wire adaptively according to an external work environment and an arc spraying method using the same.

In order to solve the above technical problems, the present invention provides a high frequency arc spraying system.

The high-frequency arc spraying system includes a wire guide portion for guiding metal wires, a high-frequency power source for supplying a high-frequency current to the metal wires, and a high-frequency power source for compressing the metal wires melted by the arc generated by the high- And a central injection nozzle for injecting air.

The high frequency power source may include supplying a high frequency current of 40 to 100 KHz to the metal wires.

The arc generated in response to the supply of the high-frequency current may include generating heat at 700 to 1100 ° C.

Wherein the high frequency arc spraying system further comprises a control unit connected to the service case and a service event for the user to directly manipulate and manipulate by the user, the service case including the wire guide and the central injection nozzle, May include a high-frequency power supply unit.

Further comprising a guide spray nozzle positioned around the central spray nozzle and tilted toward the central spray nozzle for spraying compressed air to the molten metal wires, wherein the guide spray nozzle The advancing direction of the compressed air to be injected may include a direction in which the compressed air injected from the central injection nozzle and an inclination angle are arbitrary.

The guide injection nozzle may include a guide injection hole through which compressed air is injected, and an injection hole size adjustment part mounted on the guide injection hole.

The jetting nozzle size regulating unit may include a plurality of segments for blocking the guide jetting openings and the size of the guide jetting openings may be adjusted according to the degree of overlap of the plurality of segments.

In order to solve the above technical problems, the present invention provides an arc spraying method.

The arc spraying method includes the steps of preparing metal wires, applying a high frequency current to the metal wires, melting the metal wires by an arc generated by application of the high frequency current, And spraying compressed air to the molten metal wires.

The high-frequency current may include a frequency of 40 to 100 KHz.

The arc generated by application of the high-frequency current may include generating heat at 700 to 1100 ° C.

The arc spraying method is characterized by using a guide spray nozzle located around the central spray nozzle to spray the molten metal wires with compressed air in a direction having an arbitrary inclination angle with a direction in which compressed air is sprayed by the central spray nozzle And injecting the fuel.

The arc spraying method may further include adjusting a size of a guide jet opening of the guide jetting nozzle before jetting the compressed air using the guide jetting nozzle.

A high frequency arc spraying system according to an embodiment of the present invention includes a high frequency power source for supplying a high frequency current with metal wires and a high frequency power source for injecting compressed air to the metal wires melted by an arc generated by the supply of the high frequency current And a central injection nozzle. The high frequency current supplied to the metal wires increases the temperature of the arc heat, so that the metal wires can be melted into denser particles.

Accordingly, the molten metal wires can be applied to the workpiece with a coating film having a cone-shaped and dense texture, so that the durability and the corrosion resistance of the coating film can be improved.

1 is a view for explaining an arc spraying system according to an embodiment of the present invention.
FIG. 2 is a schematic view illustrating an arc event included in an arc spraying system according to an embodiment of the present invention, which includes a wire guide, a central injection nozzle, and a guide injection nozzle included in an arc event.
3 is a view for explaining a modified example of an arc event included in an arc spraying system according to an embodiment of the present invention.
4A and 4B illustrate a guide spray nozzle included in an arc event according to an embodiment of the present invention.
5 is a flowchart illustrating an arc spraying method using an arc spraying system according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the technical spirit of the present invention is not limited to the embodiments described herein but may be embodied in other forms. Rather, the embodiments disclosed herein are provided so that the disclosure can be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

In the drawings, the size and thickness of components are exaggerated for an effective description of the technical content. Also, although the terms first, second, third, etc. in various embodiments of the present disclosure are used to describe various technical constructions, they should not be limited by these terms. These terms have only been used to distinguish one component from another. Thus, what is referred to as a first component in any one embodiment may be referred to as a second component in another embodiment. Each embodiment described and exemplified herein also includes its complementary embodiment.

1 is a view for explaining an arc spraying system according to an embodiment of the present invention.

Referring to FIG. 1, the arc event 100 may be supplied with metal wire from the wire rod supplying part 200. The metal wires may be wound on the wire rod feeder 200. The metal wires wound on the wire rod supplying part 200 may be supplied to the arc incident 100 according to the amount of the metal wire consumed in the arc event 100. [

The control feeder 300 may supply compressed air and power to the arc event 100. The control supply 300 may include a high frequency generator 310. The high frequency generating unit 310 can convert the power received from the outside into a high frequency power. The high frequency generator 310 may generate a high frequency power using various power type semiconductor elements. The frequency of the high frequency power source may be 40 to 100 KHz.

A high frequency power source supplied from the high frequency generator 310 of the control supply 300 is applied to the metal wires to generate an arc in the metal wires and the metal wires can be melted by arc heat . The molten metal wire may be applied to the workpiece by compressed air injected from the arc event 100.

According to the skin effect, when a high-frequency current flows through the metal wire, the high-frequency current flows only near the surface of the conductor. This is because an induction electromotive force generated due to the rapid change of the direction of the high frequency current flowing through the metal wire material occurs inside the metal wire material, thereby making it difficult for the high frequency current to flow to the center of the metal wire material.

Further, according to the proximity effect, when the metal wires are adjacent to each other, a high-frequency current flowing in the metal wires flows more in the vicinity of the metal wires.

When the high frequency current is applied to the metal wires according to the skin effect and the proximity effect described above, the arc heat generated due to the application of the high frequency current increases. For example, an arc heat generated by applying a current of 60 Hz to metal wires is 700 ° C., but a high frequency current of 50 KHz is applied to the metal wires and the arc heat is 700 to 1100 ° C.

The higher the temperature of the arc heat, the more the metal wires can be melted into the denser particles. And, when the metal wires are melted into denser particles, the molten metal wires can be coated with a coating film having a more conformal and dense structure in the material. Accordingly, the durability and the corrosion resistance of the coating film formed by arc spraying can be improved.

The arc spraying operator may hold the arc event 100 in his hand and scatter the molten metal toward the material. This will be described with reference to FIG.

FIG. 2 is a schematic view illustrating an arc event included in an arc spraying system according to an embodiment of the present invention, which includes a wire guide, a central injection nozzle, and a guide injection nozzle included in an arc event.

Referring to FIG. 2, the wire rod guides 122 and 124 guide the metal wires 132 and 134 supplied from the wire rod supplying unit 200 described with reference to FIG. The metal wires 132 and 134 may pass through the wire rod feeder 200 and be adjacent to each other.

The metal wires 132 and 134 may be supplied with a high frequency power from the high frequency generator 310 of the control unit 300 described with reference to FIG. 1 through power terminals 142 and 144. As a result, an arc can be generated between the metal wires 132 and 134 adjacent to each other. The metal wires 132, 134 can be melted by an arc.

The compressed air can be injected toward the molten metal wires 132, 134 from the central injection nozzle 110. The central injection nozzle 110 may be disposed between the wire rod guides 132 and 134. The molten metal wires 132 and 134 may be scattered toward the work 400 by the compressed air supplied from the central injection nozzle 110. [

A guide spray nozzle may be mounted on the arc event so that the arc sprayer can adaptively supply compressed air to the molten metal wire in accordance with the shape of the workpiece or other external working environment. This will be described with reference to FIG.

3 is a view for explaining a modified example of an arc event included in an arc spraying system according to an embodiment of the present invention.

3, in addition to the central injection nozzle 110, the wire rod guides 132 and 134, and the power terminals 142 and 144 described with reference to FIG. 2, the guide injection nozzles 152 and 154, As shown in FIG.

The guide injection nozzles 152 and 154 may be disposed around the central injection nozzle 110. The guide spray nozzles 152 and 154 may be spaced apart from each other. The guide injection nozzles 152 and 154 may be disposed so as to surround the central injection nozzle 110 and surround the central injection nozzle 110.

When the arc event further includes the guide spray nozzles 152 and 154, the molten metal wires 132 and 134 are discharged from the material (not shown) by the compressed air supplied from the central spray nozzle 110, 400 and may be scattered secondarily toward the workpiece 400 by the compressed air supplied from the guide spray nozzles 152, 154.

The guide injection nozzles 152 and 154 may be arranged to be inclined toward the central injection nozzle 110. Accordingly, the advancing direction of the compressed air injected from the guide injection nozzles 152 and 154 may have an arbitrary inclination angle with the advancing direction of the compressed air injected from the central injection nozzle 110. According to one embodiment, the direction in which the compressed air is jetted from the guide jet nozzles 152 and 154 can be adjusted. The molten metal wires can be more easily scattered toward the work 400 by the compressed air injected from the guide injection nozzles 152 and 154.

The guide injection nozzles 152 and 154 may include guide injection openings through which compressed air is injected, and injection opening size adjusters that adjust the sizes of the guide injection openings. The size of the guide injection ports of the guide injection nozzles 152 and 154 and the opening and closing of the guide injection ports can be adaptively adjusted according to the work environment by the injection port size adjusting unit. This will be described with reference to Figs. 4A and 4B.

4A and 4B illustrate a guide spray nozzle included in an arc event according to an embodiment of the present invention.

4A and 4B, a nozzle opening size adjusting unit including a plurality of segments Seg1, Seg2, ... SegN is mounted on the guide jet opening 152a of the guide jetting nozzle 152 described with reference to FIG. . The plurality of segments Seg1, Seg2, ... SegN of the injection port size regulating portion may block the guide jet opening 152a.

As the degree of overlap of the plurality of segments Seg1, Seg2, ... SegN is higher, the size of the guide jet opening 152a can be reduced as shown in FIG. 4A. In this case, the compressed air supplied from the guide injection nozzle 152 may be supplied to the metal wires 132 and 134 which are melted through the guide injection port 152a having a relatively small size. Accordingly, the guide injection nozzle 152 can inject compressed air having a relatively high pressure to the molten metal wires 132, 134. The guide injection nozzles 152 may be formed in a part of a relatively narrow range of the molten metal wires 132 and 134 scattered primarily by the compressed air supplied from the central injection nozzle 110 Compressed air can be provided.

On the other hand, as the degree of overlap of the plurality of segments Seg1, Seg2, ... SegN is lower, the size of the guide jet opening 152a may increase as shown in FIG. 3b. In this case, the compressed air supplied from the guide injection nozzle 152 may be supplied to the metal wires 132 and 134 which have been melted through the relatively large-sized guide jetting port 152a. Accordingly, the guide injection nozzle 152 can inject compressed air having a relatively low pressure to the molten metal wires 132, 134. The guide injection nozzles 152 may be formed in a relatively wide range of portions of the molten metal wires 132 and 134 that are primarily scattered by the compressed air supplied from the central injection nozzle 110 Compressed air can be provided.

The guide jet opening 152a of the guide jetting nozzle 152 can be completely clogged by the plurality of segments Seg1, Seg2, ... SegN. In this case, compressed air may not be injected into the molten metal wires 132 and 134 from the guide injection nozzles 152.

Although the guide jetting ports 152a of one of the guide jetting nozzles 152 of the guide jetting nozzles 152 and 154 described with reference to Fig. 3 are shown, the other guide jetting nozzles 154 are also shown in Figs. 4b. ≪ / RTI >

In addition, according to another embodiment of the present invention, the central injection nozzle 110 described with reference to FIGS. 2 and 3 may also include an injection nozzle size adjustment unit as described with reference to FIGS. 4A and 4B.

5 is a flowchart illustrating an arc spraying method using an arc spraying system according to an embodiment of the present invention.

5, the metal wires are prepared (S112), and a high frequency current may be applied to the metal wires (S122). As described with reference to FIG. 1, the high frequency The high frequency power generated from the generator 310 may be provided to the metal wires. The metal wires may be melted by an arc generated by application of the high-frequency current. (S132) The high-frequency current may have a frequency of 40 to 100 KHz, and the arc generated by application of the high- Heat of 700 to 1100 ° C can be generated. 2, compressed air can be injected into the molten metal wires using the central injection nozzle 110. (S142) The compressed air injected from the central injection nozzle 110 , The molten metal wires can be scattered toward the work and applied to the work. Also, as described with reference to FIG. 1, by the high-frequency current, the metal wires can be melted as dense particles at a high temperature, so that the melted metal wires are cone- As shown in FIG.

When the arc event includes the guide spray nozzles 152 and 154 as described with reference to FIG. 3, the arc spraying method according to the embodiment of the present invention may include a guide disposed around the central spray nozzle The method may further include injecting compressed air to the molten metal wires in a direction having an arbitrary inclination angle with a direction in which the central injection nozzle injects the compressed air by using the injection nozzle. In this case, the molten metal wire scattered primarily by the compressed air injected from the central injection nozzle 110 is primarily scattered by the compressed air injected from the guide injection nozzles 152 and 154 .

4A and 4B, the guide injection nozzles 152 and 154 may include an injection nozzle size adjusting unit that adjusts the size of the guide injection openings of the guide injection nozzles 152 and 154 . The injection opening size regulating unit may include a plurality of segments Seg1, Seg2, ... SegN, as described with reference to Figs. 4A and 4B. In this case, the size and opening / closing of the guide jet opening may be adjusted according to the degree of overlap of the plurality of segments Seg1, Seg2, ... SegN.

In this case, the arc spraying method according to the embodiment of the present invention is characterized in that before the compressed air is sprayed to the metal wires melted by using the guide spray nozzles 152 and 154, The method comprising the steps of: The size of the guide jet orifice may be adjusted using the arc event 100 described with reference to FIG. 1, or alternatively, using the control feeder 300.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the scope of the present invention is not limited to the disclosed exemplary embodiments. It will also be appreciated that many modifications and variations will be apparent to those skilled in the art without departing from the scope of the present invention.

100: arc event 110: central injection nozzle
122, 124: wire rod guide part 132, 134: metal wire rod
152, 154: guide spray nozzle 152a: guide jet nozzle
200:
Seg1, Seg2 ... SegN: Multiple segments

Claims (12)

A wire guide portion for guiding the metal wires;
A high frequency power source for supplying a high frequency current to the metal wires; And
And a central injection nozzle for spraying the compressed air to the metal wires melted by the arc generated according to the supply of the high-frequency current,
Further comprising a guide spray nozzle positioned around the central spray nozzle and disposed to incline toward the central spray nozzle and spraying compressed air to the molten metal wires,
Wherein the guide injection nozzle includes a guide injection hole through which compressed air is injected and an injection hole size adjustment portion mounted on the guide injection hole,
Wherein the jetting nozzle size regulating unit includes a plurality of segments for blocking the guide jetting openings and the size of the guide jetting openings is adjusted according to the degree of overlap of the plurality of segments
High frequency arc spraying system.
The method according to claim 1,
Wherein the advancing direction of the compressed air injected from the guide injection nozzle is a direction in which the compressed air injected from the central injection nozzle has an inclination angle
High frequency arc spraying system. delete delete delete delete delete delete delete delete delete delete

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