KR20090105009A - Electrode arc of plasma cutting machine - Google Patents

Abstract

PURPOSE: An electrode for a plasma arc cutter is provided to raise speed in which arc generating materials are steamed in generating plasma arc. CONSTITUTION: An electrode for a plasma arc cutter comprises an electrode body(1) and arc generating material(3). The arc generating material generates the arc. The surface of the arc generating material is processed in a rough surface. The arc generating material is inserted into the arc generating coupling hole(7). An arc generating coupling hole is formed on the front end of the body(19) of the electrode body. A vacuum lead material(10) is used and brazing-processed in a vacuum furnace.

Description

Electrode for plasma arc cutting machine

The present invention relates to an electrode for plasma arc cutting machine, the technique of the present invention is very reasonable by extending the service life of the electrode by further improving the manufacturing process and technical configuration of the electrode for plasma arc cutting machine for cutting metal. It can be used as.

Conventional plasma arc cutting electrode which is mainly used up to now is a method of forcing the arc generating material into the electrode body;

A method of bonding the two metals by brazing the electrode body and the arc generating material with a vacuum brazing material,

A method of forcing the arc generating material into the intermediate insert by mechanically joining the electrode body using an intermediate insert between the electrode body and the arc generating material;

A method of forcing the arc generating material by treating the tip of the electrode body with Ag (silver) and Ag (silver) alloys which are all or part of different metals;

There is a method of discharging the electrode body tip using a fine copper pipe, and forcing a reinsertion hole by processing an insertion recombination hole in the center of the arc generating material on a projecting portion having a shape opposite to the pipe shape.

In the conventional electrode configuration and manufacturing method, since the intermediate insert 2 and the arc generating material 3 are in contact with each other by force as shown in FIG. 6, the interface 12 is generated and the electrical resistance is relatively high. The rate at which high-temperature heat and electrical conductivity is transferred to Ag (silver) and Ag (silver) alloy at the time of generation is blocked at the interface 12, and the rate at which the arc generating material 3 melt-evaporates due to the ultra-high temperature generated during cutting of the steel sheet. Is accelerated, the life of the electrode is extremely short, and the generation of arc is unstable, resulting in an adverse effect on quality and productivity when cutting the steel sheet.

Therefore, the conventional technique is to follow the limit of electrode life when the arc of the electrode occurs.

That is, referring to the conventional manufacturing method and configuration, by forcing the arc-generating material (3) for generating an arc, by the heat generated between the electrode body (1) and the arc generating material (3) when the arc is generated When the interface 12 is generated, there is a problem that the electrical conductivity and the thermal conductivity are significantly lowered. When the arc generating material 3 generating arcs is brazed integrally with the electrode body 1, the arc generating material 3 has a high temperature. Atmospheric arc temperatures can be very high.

At this time, the oxygen contained in the plasma gas combines with the electrode body 1 to form an oxide, so that oxidation occurs first, and thermal conductivity and electrical conductivity become very low, thereby accelerating the evaporation of the metal 3 generating arc. In the end, the problem was that the lifespan was extremely short.

In order to improve this conventional problem in the present invention, by providing a method for improving the life of the electrode by minimizing the rate of melting and evaporating the arc generating material (3), the arc generating material (3) In order to increase the surface area of the electrode, and to improve the thermal conductivity and the electrical conductivity, as shown in Figure 3 a to e of the electrode to process the surface in various forms to use in a plated or unplated state,

In addition, in order to stabilize thermally and electrically as shown in FIGS. 4A to 4, the outer surface of the arc generator 3 is processed in the same manner as in FIGS. 3A to 3E, and the arc generator 3 is An electrode used in the plating or non-plating state by separately processing the insertion and recombination hole (11) in the interior thereof;

In addition, as shown in a to e of FIG. 5, the inside of the arc generating material 3 is processed into the reinsertion hole 11 as shown in a to e of FIG. It is configured to be able to be coupled to the stepped coupling hole 16 of the electrode body 1 to provide an electrode for use in a plated or unplated state,

As shown in FIG. 1, the electrode body 1 and the arc generating material 3 are integrally brazed in a vacuum furnace, and a method of manufacturing the electrode, as shown in FIG. 2, to protect the arc generating material 3. For this purpose, the electrode body (1), the intermediate insert (2) and the arc generating material (3) were brazed in a vacuum furnace using Ag (silver) and Ag (silver) alloys, which are the intermediate inserts (2), to form an arc generating material. It is to provide a high-ampere plasma electrode manufacturing method for forming an integral bonding surface 13 without the interface 12 due to interfacial defects between the electrode body 1 and (3) to form an integral bonding interface. .

The present invention processes the surface of the arc generating material (3) into an uneven shape so that an integral surface (13) having no interface (12) is formed on the joining surface of the arc generating material (3) and the electrode body (1) for generating an arc. By inserting the arc generating material (3) into the arc generating recombination hole (7) formed in the body tip portion 19 of the electrode body (1) and then brazing in the vacuum furnace using the vacuum braze 10 to the electrode body ( 1) and the arc generating material (3) is integrally formed.

After inserting the insertion material 4 by processing the insertion recombination hole 11 in the center of the arc generating material 3, the intermediate insert 2 is inserted into the intermediate insertion recombination hole 6, and in turn the arc generating material ( 3) is inserted into the arc generating recombination hole (7) formed on the opposite side of the body inner plane projection (9) of the electrode body (1) so that a part of the upper end of the insert (4) can be inserted into the recombination hole (8) Assemble and place the vacuum brazing material 10 in the brazing material coupling groove (2a) formed in the intermediate insert (2) and brazing in the vacuum furnace to the electrode body (1), the intermediate insert (2), the arc generating material (3) The insert 4 and the vacuum braze 10 are configured to be integrated.

In the body tip portion 19 of the electrode body 1 to form an intermediate insert recombination hole (6) separately from the arc generating recombination hole (7) to combine the intermediate insert (2) configured separately, the arc to generate an arc In order to protect the generator 3 from being evaporated and consumed at a high temperature, the intermediate insert 2 uses Ag (silver) and Ag (silver) alloy.

Since the arc generating material 3 is limited by the size of the inner surface projections 9 of the electrode body 1 and the size of the space 14, a two-step step coupling is formed inside the arc generating recombination hole 7. The hole 16 is formed and processed according to the size inserted into the body end portion 19 of the electrode body 1 and the size of the hole inserted into the arc generating recombination hole 7 inside the electrode body 1.

In order to extend the life of the arc generating material (3) it is configured to protrude 120 to 250% of the inner body inner plane projection 9 of the electrode body 1 of the body tip portion 19 of the electrode body (1).

In order to prolong the life of the arc generating material 3, the inner cone-shaped protrusion 15 inside the body of the electrode body 1 constitutes 20 to 150% of the tip of the body 19 of the electrode body 1.

In order to extend the life of the arc generating material (3) is processed in parallel with the body end portion 19 of the electrode body (1) to expose and insert the arc generating material (3) and the intermediate insert (2).

In order to extend the life of the arc generating material (3) is configured by exposing the arc generating material (3) protruding.

In order to reduce the rate at which the arc generating material 3 melts, oxidizes, and evaporates due to high temperature when an arc is generated, an intermediate insert material 2 having a good electrical and thermal conductivity is formed between the electrode body 1 and the arc generating material 3. The circular cross-sectional area is used, the intermediate insert (2) of 150 ~ 500% size of the arc generating material (3).

An arc generating material (3) for generating an arc forms a surface in an uneven shape to widen the surface area, and is configured as a round rod type filled with an inside.

An arc generating material (3) for generating an arc is formed so that the surface is formed in a concave-convex shape to widen the surface area, and to form the insert recombination hole 11 therein to couple the insert (4).

The arc generating material 3 which generates an arc processes the outside of the surface in two steps, forms a step | step, and forms the surface of the large diameter part in uneven | corrugated shape, and comprises a wide surface area.

The arc generating material (3) for generating an arc forms a step by processing the outside of the surface in two stages, and forms a surface of a large diameter portion in a concave-convex shape to form a wide surface area, and also has a reinsertion hole inside ( 11) to form an insert (4) can be combined to form.

The uneven shape formed on the surface of the arc generating material 3 that generates the arc is configured in various shapes.

Intermediate insert (2), arc generating material (3), inserting material (4) coupled to the arc generator coupling hole (7) and the intermediate insert recombination hole (6) and the insert recombination hole (8) of the electrode body (1) ) Is plated or alloyed so as to form a good integral surface 13, rather than an interface 12, at a portion which is contacted by vacuum brazing in a vacuum furnace using the vacuum brazing material 10 as a metal, and is variously modified.

The present invention compensates for the drawback that the electrode life is reduced due to the presence of the interface 12 between the electrode body 1 and the arc generating material 3 generating the arc, which is a conventional electrode manufacturing technique, and thus the electrode body 1 and the arc generation. In order to increase the cross-sectional area of the arc generating material (3) by the electrode manufacturing method to integrally combine the ash (3) integrally to solve the problem of the existing electrode by forming an insertion recombination hole 11 in the center, (3) In order to protect the electrode by using the intermediate insert (2).

Therefore, in the present invention, in order to increase the cross-sectional area of the arc generating material (3) to be able to stably generate the arc at 350A or more, the electrode body (1), the intermediate insert ( 2) An electrode for vacuum brazing the arc generating material 3 and the insert 4 using the vacuum solder 10 in a vacuum furnace is provided.

In addition, in order to extend the life of the electrode, the surface of the arc generating material (3) was processed into a concave-convex shape to increase the cross-sectional area, and in order to maximize the cooling effect of the arc generating material (3), the processing shape inside the electrode body (1) was increased. Exposing the cooling fluid flow line 18 moving in the cooling fluid pipe 17 to be in direct contact with the arc generating material 3 to extend the rate at which the arc generating material 3 melt-evaporates at very high temperatures during the plasma arc generation. Follows.

The configuration of the present invention is characterized in that the arc generating material 3 is processed to have an uneven shape as shown in FIG. 1 to have an excellent electrode life than the conventional electrode.

Conventional electrode manufacturing method has a defect that the arc generation time is not stable due to the interface 12 or interface defects due to mechanical bonding, the lifetime of the electrode is not stable due to the presence of the interface 12 and cannot be used for high amperage. It was.

In order to stably generate the arc at high amperage to cut the iron plate, the arc bale raw material 3 is made of an integral surface 13 having no interface defect with the electrode body 1, and the heat generated from the arc generating material 3 is It is easily transmitted to the electrode body 1 by the integral surface 13 having no interface 12, and also heat and electrical conductivity can be stably transmitted through the insertion and recombination hole 11 of the arc generating material 3. It is a structure with good electrical and thermal conductivity by processing the structure and the external shape of the arc generating material 3 to enlarge the cross-sectional area.

The above configuration will be described in detail with the accompanying drawings.

1 is a shape of a plasma electrode constituting the electrode is composed of the electrode body 1, the arc generating material (3), the insertion material (4), the vacuum solder (10), the processing method of the arc generating material (3) 3 to 5 according to the processing as shown in Figure 3 to selectively plated, or after assembling in a non-plated state, the electrode body (1), the arc generating material (3), inserting material (4) by assembling the vacuum brazing material (10) ) Can be combined in one piece by brazing in a vacuum furnace.

2 is a shape of a plasma electrode constituting an electrode, the electrode body 1 generally uses copper, and the intermediate insert 2 is arced with Ag (silver) and Ag (silver) alloys having excellent thermal and electrical conductivity. A cross-sectional area of 1.5 to 5 times the size of the generating material 3 is required.

Therefore, the insertion and recombination hole 11 is processed at the center for thermal and electrical stability of the arc generating material 3, thereby inserting Ag (silver) and Ag (silver) alloys, Cu (copper) and Cu (copper) alloys. After inserting the ash (4), the intermediate insert (2) is inserted into the intermediate insert recombination hole (6), and in turn, the arc generating material (3) on the opposite side of the inner body projection (9) of the electrode body (1) Inserted into the arc generating recombination hole (7) formed to assemble so that the upper part of the insert (4) can be inserted into the insert recombination hole (8), the lead material coupling formed in the intermediate insert (2) Placed in the groove (2a) and brazed in a vacuum furnace to combine the electrode body (1), the intermediate insert (2), the arc generating material (3), the insert material (4), the vacuum solder material (10) to be integral can do.

3 shows the irregularities (for example, a: unprocessed, b: jagged, c: square, d: trapezoidal, e: semicircular, etc.) of various shapes on the surface of the arc generating material 3; The surface area to be processed and joined is configured to be as wide as possible.

FIG. 4 processes the arc generating material 3 into a concave-convex shape of various shapes on the surface as shown in FIG. 3 in order to thermally and electrically stabilize the arc generating material 3, and forms an insertion recombination hole 11 inside.

5 is formed in the shape of the arc generating material (3) of the various concave-convex structure as shown in FIG. 9, 15) is configured to be coupled to the step coupling hole 16 is formed separately on the opposite side.

FIG. 6 shows a structure in which a constant interface 12 is formed between two metals A and B when the two materials are forcibly driven or forcibly driven.

FIG. 7A shows two materials or electrode bodies 1, intermediate inserts 2, arc generating materials 3 and inserts 4 in close contact with each other and is brazed in a vacuum furnace using a vacuum braze 10. The interface 12 is eliminated and configured to have an integral surface 13.

7B shows that when the brazing process is performed in the vacuum furnace by using the vacuum solder 10 at the interface 12, the two metals are joined to the unitary surface 13 where the interface 12 does not exist by the liquid vacuum solder 10. Looks structure.

FIG. 8 processes the arc generating material 3 into various shapes as shown in FIG. 3 to braze the electrode body 1 and the arc generating material 3 in a vacuum furnace, and the inner body projection inside the electrode body 1. (9) is formed, the length of the body inner plane projection (9) is formed to about 120 to 250% of the thickness of the body tip portion 19 of the electrode body (1).

FIG. 9 illustrates the processing of the arc generating material 3 into various shapes as shown in FIG. 3 to process the electrode body 1 and the arc generating material 3 in a vacuum furnace to process the inner cone-shaped protrusion inside the body of the electrode body 1. 15 is sharply formed, and the length of the body inner cone-shaped protrusion 15 is about 20 to 150% of the thickness of the body tip portion 19 of the electrode body 1.

10 is to process the arc generating material (3) in various shapes as shown in Figure 3 to increase the cooling efficiency of the arc generating material (3) by brazing the electrode body (1) and the arc generating material (3) in a vacuum furnace Configure by exposing.

11 is to process the arc generating material (3) in various shapes as shown in Figure 3 to increase the cooling efficiency of the arc generating material (3) by brazing the electrode body (1) and the arc generating material (3) in a vacuum furnace Only the arc generating material 3 is formed to protrude.

FIG. 12 illustrates that the arc generating material 3 is processed into various shapes as shown in FIG. 3 to insert the intermediate insert 2 into the intermediate insertion recombination hole 6 formed in the body front end portion 19 of the electrode body 1. By brazing integrally by the vacuum braze 10 to form the inner body projections 9 inside the electrode body 1, the length of the inner body projections 9 is the body of the electrode body (1) The tip portion 19 is formed to about 120 to 250% of the thickness.

FIG. 13 processes the arc generating material 3 into various shapes as shown in FIG. 3 and inserts the intermediate insert 2 into the body tip portion 19 of the electrode body 1 and brazes integrally by the vacuum brazing material 10. The length of the body inner cone-shaped protrusion 15 formed inside the electrode body 1 by treatment is about 20 to 150% of the thickness of the body tip portion 19 of the electrode body 1.

FIG. 14 shows the intermediate shape of the intermediate insert (2) by processing the processing shape of the inner surface (cone) protrusions 9 and 15 inside the electrode body 1 to be equal to the thickness of the body tip portion 19 of the electrode body 1; The arc generating material 3 is configured to be directly exposed to the cooling fluid flow line 18.

FIG. 15 shows the intermediate insert (2) by processing the shape of the inner surface (cone) protrusions 9 and 15 inside the electrode body 1 to be equal to the thickness of the body tip portion 19 of the electrode body 1; ) Is exposed to the cooling fluid flow line 18 and is formed such that only the arc generating material 3 protrudes.

FIG. 16 illustrates the process of arc generating material 3 in various shapes as shown in FIG. 4 to process the electrode body 1 and the arc generating material 3 in a vacuum furnace to process the inner body projection inside the electrode body 1. (9) is formed, the length of the body inner plane projection (9) is formed to about 120 to 250% of the thickness of the body tip portion 19 of the electrode body (1).

FIG. 17 illustrates an arc generator 3 having various shapes as shown in FIG. 4, and brazing the electrode body 1 and the arc generator 3 in a vacuum furnace, thereby forming an inner cone-shaped protrusion inside the body of the electrode body 1. It is formed sharply in the form (15), the length of the body inner cone-shaped protrusion 15 is formed about 20 ~ 150% of the thickness of the body tip portion 19 of the electrode body (1).

FIG. 18 processes the arc generating material 3 into various shapes as shown in FIG. 4 and processes the arc generating material 3 to be equal to the thickness of the body tip portion 19 of the electrode body 1 to increase the cooling efficiency of the arc generating material 3. It is constructed by exposing to the fluid flow line 18.

19 is to increase the cooling efficiency of the arc generating material (3) by processing the arc generating material (3) in a variety of shapes as shown in Figure 4 in parallel with the thickness of the body tip portion 19 of the electrode body (1). Only the arc generating material 3 is configured to protrude.

FIG. 20 processes the arc generating material 3 into various shapes as shown in FIG. 4 and inserts the intermediate insert material 2 into the intermediate insert re-engagement hole 6 formed in the body front end portion 19 of the electrode body 1 and vacuums it. The process of processing the inner part of the electrode body 1 to protrude like the inner surface of the inner body protrusion 9 by brazing integrally by the brazing filler metal 10, and the length of the inner protrusion is about 120 to 250% of the thickness of the body tip 19. Form.

FIG. 21 processes the arc generating metal 3 into various shapes as shown in FIG. 4 and inserts the intermediate inserting metal 2 into the body end portion 19 of the electrode body 1 to be integrally brazed by the vacuum braze 10. Processed to form a pointed body-shaped cone-shaped protrusion 15 in the interior of the electrode body 1, the length of the body inner cone-shaped protrusion 15 is 20 ~ 150 of the thickness of the electrode body (1) body tip (19) Form about%.

FIG. 22 shows the intermediate insert 2 and the arc generating material in such a manner as to process the processing shape inside the electrode body 1 to be equal to the thickness of the body tip portion 19 of the electrode body 1 as shown in FIGS. 20 and 21. 3) is configured to be directly exposed to the cooling fluid flow line (18).

FIG. 23 illustrates a process of equilibrating the processing shape inside the electrode body 1 with the thickness of the body tip portion 18 of the electrode body 1 as shown in FIGS. 20 and 21. Exposed to (18) and formed so that only the arc generating material (3) protrudes.

24 shows the arc generating material 3 in various shapes as shown in FIG. 3 and inserts the intermediate insert 2 into the body end portion 19 of the electrode body 1 in a U-shape to form a U-shaped shape. The length of the protruding portion is formed to be about 120 to 250% of the thickness of the body tip portion 19 of the electrode body 1 by the method of processing the inner portion of the electrode body 1 to protrude like the inner surface protrusions 9 by brazing integrally. do.

FIG. 25 illustrates that the arc generating material 3 is processed into various shapes as shown in FIG. 4 by inserting the intermediate insert 2 into a U-shape into the body end portion 19 of the electrode body 1 by the vacuum solder material 10. The length of the protruding portion is about 120 to 250% of the thickness of the body tip portion 19 of the electrode body 1 by the method of processing the inner portion of the electrode body 1 to protrude like the inner surface projections 9 by brazing integrally. Form.

FIG. 26 illustrates a method of processing the arc generating material 3 into two different shapes as shown in FIG. 5 by brazing in a vacuum furnace to protrude the inner surface projection 9 of the body of the electrode body 1. Since the size of the stepped coupling hole 16 inserted into the planar protrusion 9 is limited depending on the size of the inner space 14 and the body inner flat protrusion 9 of the electrode body 1, the stepped coupling hole 16 ) Size and shape dimensions give an important function, so the protruding length is formed about 120 ~ 250% of the thickness of the body tip portion 19 of the electrode body (1).

FIG. 27 illustrates a method of processing the arc generating material 3 into various shapes as shown in FIG. 5 by brazing in a vacuum furnace to process the cone-shaped protrusion 15 inside the body of the electrode body 1 into a pointed shape. Since the size of the step coupling hole 16 inserted into the inner cone protrusion 15 is limited depending on the size of the inner space 14 of the electrode body 1 and the body inner cone protrusion 15, the step coupling hole The size and shape of (16) give an important function, and the protruding length is formed about 20 to 150% of the thickness of the body tip portion 19 of the electrode body 1.

FIG. 28 is a two-stage process of the arc generating material 3 into various shapes as shown in FIG. 5 to couple the intermediate insert 2 to the tip of the electrode body 1 and integrally braze the vacuum brazing material 10. The inner space portion 14 of the electrode body 1 is formed by a step coupling groove 16 formed in the inner surface of the body inner protrusions 9 by processing the inner body protrusions 9 of the electrode body 1. And since the shape and shape of the stepped coupling groove 16 gives an important function because it is limited by the size of the body inner plane projection (9) the length is 120 ~ of the thickness of the body tip portion 19 of the electrode body (1) Form about 250%.

FIG. 29 is a two-stage process of the arc generating material 3 into various shapes as shown in FIG. 5, and an electrode is brazed integrally by the vacuum brazing material 10 using the intermediate insert 2 at the tip of the electrode body 1; The stepped coupling groove 16 formed inside the body inner cone-shaped protrusion 15 by a method of processing the body inner cone-shaped protrusion 15 into a pointed shape in the body 1 has an internal space of the electrode body 1. Since the shape of the step 14 and the cone-shaped protrusion 15 inside the body is limited according to the size, the shape and shape of the stepped coupling groove 16 give an important function, so that the protruding length is the thickness of the body tip portion 19 of the electrode body 1. Form 20 ~ 150% of the length.

30 shows the arc generating material 3 in various shapes as shown in FIG. 3, followed by two-stage processing as shown in FIG. 5 to insert the intermediate insert 2 into the tip of the electrode body 1 in a U-shape to form a vacuum solder material. The internal protrusion length is the thickness of the body tip portion 19 of the electrode body 1 in such a way that the internal body of the electrode body 1 is protruded to be integrally brazed by the body 10 so as to project the inside of the electrode body 1 like the inner surface protrusions 9. Form about 120-250% of the amount.

31 shows the arc generating material 3 in two stages in various shapes as shown in FIG. 5 and inserts the intermediate insert 2 into the tip of the electrode body 1 in a U-shape to be integrally formed by the vacuum brazing material 10. The size of the step coupling hole 16 inserted into the inner surface of the inner surface protrusion 9 of the body is processed by brazing to process the inner body of the electrode body 1 such that the inner surface protrusions 9 protrude. Since the shape and shape of the stepped coupling hole 16 impart an important function since the internal space 14 and the body inner plane projection 9 of 1 are restricted, the protruding length is the electrode body 1. The body tip portion (19) of about 120-250% of the thickness is formed.

In summary, what is described in the above drawings is as follows.

The electrode having the structure as shown in FIG. 1 forms the electrode body 1 and the arc generating material 3 as an integral surface 13 having no interface 12, and the arc generating material 3 is thermally and electrically connected. 3 to 5 to form a state in which the shape of the shape as shown in Fig. 3 to 5 so as to generate an arc in a stable state (Fig. 8 to 11), and the insertion and recombination hole 11 in the inner center in the state of processing the shape ) And then inserting the insert 4 to braze the vacuum furnace to form an integrated electrode (FIGS. 16 to 19, 24, 25) to improve the conventional electrode manufacturing process and to It is characterized by being able to extend its life.

The electrode as shown in FIG. 2 is a vacuum lead material using Ag (silver) and Ag (silver) alloys, which are intermediate inserts (2) having excellent thermal and electrical conductivity, on the body leading end portion 19 of the electrode body 1. After processing the arc generating recombination hole (5) that can be inserted into the lead recombination groove (2a) and the arc generating material (3) to place the (10) in the arc generating recombination hole (7) of the electrode body (1) After assembling and assembling the insert (4) into the reinsertion hole (8) through the reinsertion hole (11) in turn, and then put the vacuum solder (10) in the brazing material coupling groove (2a) of the intermediate insert (2) After maintaining the furnace body for about 7 to 10 minutes at a temperature of 10 to 30 ° C. higher than the melting temperature of the vacuum braze 10, the electrode body 1, the intermediate insert 2, the arc generating material 3, and the insert ( 4) is integrally combined to form an electrode.

3, 4 and 5, the surface of the arc generating material 3 is processed as shown in Fig. 3, 4, 5 to insert the insert 4 into the insertion recombination hole (11) of the arc generating material 3 to form an electrode combined As shown in FIGS. 12, 13, 14, 15, 20, 21, 22, 23, and 26, the processing shapes of the inner body inner surface (cone) protrusions 9 and 15 of the electrode body 1 are as follows. It can be configured as shown in FIG.

Therefore, the characteristics of the present invention is that the arc generating material 3 is in close contact with the two electrodes as shown in FIG. 6 as compared with the conventional electrode, the interface 12 of A and B does not exist, and the vacuum solder 10 as shown in FIGS. 7A and 7B. Vacuum brazing to form the diffusion bonding interface, that is, the integral surface 13.

According to the present invention, the electrode body (1), the intermediate insert (with a bonding interface that significantly improves the electrical and thermal conductivity than the structure of forcing the arc generating material is a conventional manufacturing method or vacuum brazing the electrode body and the arc generating material) 2) As the arc generating material 3 and the insert 4 are integrally vacuum brazed, the arc generating material 3 can be evaporated and consumed by high temperature during arc generation to significantly reduce the electrode life. It can be effective.

On the other hand, the arc generating material 3 is integrally bonded by the vacuum brazing material 10 so as not to generate an interface with Ag (silver) and Ag (silver) alloy, which is the intermediate insert (2), the arc is stable at high temperatures when the arc is generated The life of the electrode is extended because the rate of melting and evaporation of the arc generating material 3 is significantly reduced compared with the conventional manufacturing method because it is generated, the cooling effect is large, and the electrical conductivity is stabilized.

In order to produce an electrode stably generating an arc at 350A or more to prolong the life of the electrode, an arc generating material 3 generating arcs may be processed into an uneven shape or an intermediate insert 2 may be disposed between the electrode bodies 1. The electrode body (1), the intermediate insert (2), the arc generating material (3), and the insert (4) should be manufactured in one piece by inserting, and the intermediate insert (2) has a circular cross-sectional area than the arc generating material (3). Should be 150-500% or more.

If the interface 12 is present between the electrode body 1 and the arc generator 3 without using the intermediate insert 2, as shown in FIG. 6, the thermal and electrical conductivity due to the interface 12 is present. The low evaporation rate accelerates the evaporation rate of the arc generating material 3 so that the life of the electrode is significantly reduced at 350 A or more.

1 is an exploded cross-sectional view showing a preferred embodiment of the present invention

2 is an exploded cross-sectional view showing a modified embodiment of another structure of the present invention.

Figure 3 is a view showing the various forms of the rod-shaped arc generating material of the present invention

4 is a view showing various forms of a tubular arc generating material of the present invention;

Figure 5 is a view of the form stepped outside the tubular arc generating material of the present invention

6 shows an interface between two metals bonded by the present invention.

7A shows an integral side of two metals joined by the present invention;

7b shows an interface and an integral surface of two metals joined by the present invention.

8 to 15 are cross-sectional views showing various modified embodiments in the form of combining the arc generating material as shown in Figure 3 in the structure of Figures 1 and 2

16 to 31 are cross-sectional views showing various embodiments of modifications based on FIGS. 1 and 2 of the present invention.

<Description of the code used in the main part of the drawing>

1: electrode body 2: intermediate insert

3: arc generating material 4: inserting material

5: Arc generating recombination hole 6: Intermediate insertion recombination hole

7: Arc generating recombination hole 8: Insert recombination hole

9: body inner plane projection 10: vacuum brazing

11 insertion hole 12: interface

13: one side 14: space

15: body inner cone-shaped protrusions 16: step coupling portion

17: cooling fluid pipe 18: cooling fluid flow line

19: body end portion

Claims (15)

The surface of the arc generating material 3 is processed into a concave-convex shape so that an integral surface 13 having no interface 12 is formed on the joining surface of the arc generating material 3 and the electrode body 1 for generating an arc. Inserting the generating material (3) into the arc generating recombination hole (7) formed in the body front end portion 19 of the electrode body (1) and then brazing in the vacuum furnace using the vacuum braze 10 to the electrode body (1) and An electrode for plasma arc cutting machine, characterized in that the arc generating material (3) is formed integrally. The method of claim 1, After inserting the insertion material 4 by processing the insertion recombination hole 11 in the center of the arc generating material 3, insert the intermediate insert (2) into the intermediate insertion recombination hole (6), in turn the arc generating material (3) is inserted into the arc generating recombination hole (7) formed on the opposite side of the body inner plane projection (9) of the electrode body (1) so that a portion of the upper end of the insert (4) can be inserted into the recombination hole (8) And the vacuum solder material 10 is placed in the solder material coupling groove 2a formed in the intermediate insert material 2 and brazed in a vacuum furnace to form the electrode body 1, the intermediate insert material 2, and the arc generating material 3 ), The insert (4), the vacuum soldering material 10 is configured to be an integrated electrode for plasma arc cutting machine. The method of claim 1, In the body tip portion 19 of the electrode body 1 to form an intermediate insert recombination hole (6) separately from the arc generating recombination hole (7) to combine the intermediate insert (2) configured separately, the arc to generate an arc In order to protect the generator 3 from being evaporated and consumed at a high temperature, the intermediate insert 2 is made of Ag (silver) and Ag (silver) alloy. The method of claim 1, Since the arc generating material 3 is limited by the size of the inner surface projections 9 of the electrode body 1 and the size of the space 14, a two-step step coupling is formed inside the arc generating recombination hole 7. Forming a hole 16 to be inserted into the body end portion 19 of the electrode body 1 and the process according to the size to be inserted into the arc generating recombination hole 7 inside the electrode body 1, characterized in that the mutual coupling Electrode for plasma arc cutting machine. The method of claim 1, In order to extend the life of the arc generating material (3) characterized in that the inner body inner surface projections 9 of the electrode body 1 is configured to protrude 120 to 250% of the body tip portion 19 of the electrode body (1) Electrode for plasma arc cutting machine. The method of claim 1, In order to extend the life of the arc generating material (3), the inner cone-shaped protrusion 15 of the inner body of the electrode body (1) is characterized in that 20 to 150% of the body tip portion 19 of the electrode body (1) Electrode for plasma arc cutting machine. The method of claim 1, In order to prolong the life of the arc generating material 3, it is processed in parallel with the body tip portion 19 of the electrode body 1, and the arc generating material 3 and the intermediate insert 2 are exposed and inserted. Electrode for plasma arc cutting machine. The method of claim 1, An electrode for plasma arc cutting machine, characterized in that configured to expose the arc generating material (3) to protrude in order to extend the life of the arc generating material (3). The method of claim 1, In order to reduce the rate at which the arc generating material 3 melts, oxidizes, and evaporates due to high temperature when an arc is generated, an intermediate insert material 2 having a good electrical and thermal conductivity is formed between the electrode body 1 and the arc generating material 3. The plasma arc cutting electrode, characterized in that the size of the circular cross-sectional area using an intermediate insert (2) of 150 to 500% of the arc generating material (3). The method of claim 1, An arc generating material (3) for generating an arc is a plasma arc cutting electrode, characterized in that the surface is formed in a concave-convex shape to widen the surface area, and configured as a round rod type filled with the inside. The method of claim 1, The arc generating material (3) for generating an arc has a surface which is formed to have a concave-convex shape to widen the surface area, and to form an inserting recombination hole (11) therein so that the inserting material (4) can be combined. Electrodes for arc cutters. The method of claim 1, The arc generating material (3) for generating an arc is a plasma arc cutting electrode characterized in that the outer surface of the surface is processed in two stages to form a step, and the surface of the large diameter portion is formed in an uneven shape to make the surface area wide. . The method of claim 1, The arc generating material (3) for generating an arc forms a step by processing the outside of the surface in two stages, and forms a surface of a large diameter portion in a concave-convex shape to form a wide surface area, and also has a reinsertion hole inside ( 11) forming a plasma arc cutting electrode, characterized in that configured to be coupled to the insert (4). The method of claim 1, The uneven shape formed on the surface of the arc generating material (3) for generating an arc is composed of a plasma arc cutting electrode, characterized in that configured in various shapes. The method of claim 1, Intermediate insert (2), arc generating material (3), inserting material (4) coupled to the arc generator coupling hole (7) and the intermediate insert recombination hole (6) and the insert recombination hole (8) of the electrode body (1) ) Is plated or alloyed so as to form a good integral surface 13 instead of the interface 12 at the portion which is contacted by vacuum brazing in a vacuum furnace using the vacuum brazing material 10 as a metal, and is variously modified. Electrode for plasma arc cutting machine.

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