KR101754919B1 - Nozzle for gas welding torch - Google Patents

Nozzle for gas welding torch Download PDF

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Publication number
KR101754919B1
KR101754919B1 KR1020160000466A KR20160000466A KR101754919B1 KR 101754919 B1 KR101754919 B1 KR 101754919B1 KR 1020160000466 A KR1020160000466 A KR 1020160000466A KR 20160000466 A KR20160000466 A KR 20160000466A KR 101754919 B1 KR101754919 B1 KR 101754919B1
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KR
South Korea
Prior art keywords
nozzle body
groove portion
laminar flow
grooves
body member
Prior art date
Application number
KR1020160000466A
Other languages
Korean (ko)
Inventor
조정호
정훈철
이용기
김용준
박경배
Original Assignee
충북대학교 산학협력단
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by 충북대학교 산학협력단 filed Critical 충북대학교 산학협력단
Priority to KR1020160000466A priority Critical patent/KR101754919B1/en
Application granted granted Critical
Publication of KR101754919B1 publication Critical patent/KR101754919B1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K9/00—Arc welding or cutting
    • B23K9/24—Features related to electrodes
    • B23K9/26—Accessories for electrodes, e.g. ignition tips
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K9/00—Arc welding or cutting
    • B23K9/16—Arc welding or cutting making use of shielding gas
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K9/00—Arc welding or cutting
    • B23K9/24—Features related to electrodes
    • B23K9/28—Supporting devices for electrodes
    • B23K9/29—Supporting devices adapted for making use of shielding means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K9/00—Arc welding or cutting
    • B23K9/24—Features related to electrodes
    • B23K9/28—Supporting devices for electrodes
    • B23K9/29—Supporting devices adapted for making use of shielding means
    • B23K9/291—Supporting devices adapted for making use of shielding means the shielding means being a gas
    • B23K9/295—Supporting devices adapted for making use of shielding means the shielding means being a gas using consumable electrode-wire

Abstract

The present invention relates to a nozzle for a welding torch, which nozzle is disposed on an end side of a torch head of a welding torch and is connected to an insulator or a gas diffuser of a torch head to inject a protective gas, Wherein a flow path of the jetting gas is formed into a laminar flow and injected therein to stabilize the flow of the protective gas and to uniformly supply a protective gas of a predetermined amount or more to the nozzle body member in a circumferential direction on the inner circumferential surface of the nozzle body member And the flow of the protective gas is stabilized to uniformly spray the protective gas during the welding operation, thereby securing high weldability and improving the welding quality.

Description

[0001] The present invention relates to a nozzle for a welding torch,

The present invention relates to a nozzle for a welding torch.

Generally, an arc welder performs welding by supplying an consuming electrode wire acting on a filler material to a melting furnace at a constant speed while generating an arc between the wire and the base material through an electric current. Argon and the like, and it is widely used for welding carbon steel, alloy steel and non-ferrous metal.

Such an arc welder is largely composed of a welding body, a wire feeder, and a welding torch. The welding torch is divided into a torch body and a torch head which are connected to the welding body through a welding cable and directly grasped by an operator.

At this time, the torch head is combined with the torch body to perform welding in proximity to the base material. Conventionally, various types of torch heads have been proposed and used.

The torch head is coupled to the torch body of the welding torch and performs arc welding while discharging the wire and the protective gas to the outside.

The protective gas is injected through the nozzle of the torch head and plays an important role in preventing the welding portion from being oxidized by cutting off the hot molten portion from the atmosphere.

The nozzle is formed to surround the welding tip and is disposed on the end side of the torch head. The nozzle is usually coupled to the end side of the insulator of the torch so as to enclose the welding tip therein. Spray.

However, the conventional nozzle for a welding torch is simply formed in a cylindrical shape, and when the inner circumferential surface is formed in a plane and the flow rate of the protective gas is increased, the flow of the fluid becomes confused and mixed with the atmosphere at the time of jetting, There is a problem in that the injection of the fuel is unstable.

Further, the protective gas injected from the nozzle for welding torch is unstably injected, so that the weldability is lowered and the welding quality is lowered.

Korean Patent Laid-Open No. 2015-055899 'Double Shield Torch Nozzle for Welding (Published May 22, 2015)

An object of the present invention is to provide a nozzle for a welding torch which ensures high weldability by spraying the flow of protective gas stably and improves the welding quality.

In order to achieve the above object, a nozzle for a welding torch according to the present invention is a nozzle for a welding torch which is disposed on an end side of a torch head of a welding torch and is coupled to an insulator or a gas diffuser of a torch head, And a nozzle body member having a shape penetrating through the nozzle body member in a longitudinal direction, wherein a lateral groove portion is formed in an inner peripheral surface of the nozzle body member in the circumferential direction.

In the present invention, the inner circumferential surface of the nozzle body member may be formed on the lower side of the lateral groove portion to extend to the jetting port side end portion where the laminar flow forming longitudinal groove portion is longitudinally injected.

In the present invention, the laminar flow forming longitudinal grooves may be formed in a manner communicating with the lateral grooves.

In the present invention, the lateral grooves may include a plurality of longitudinally spaced grooves.

In the present invention, the transverse grooves may have a continuous shape in which the semicircular protrusions and the semicircular grooves are alternately repeated, or may have a continuous shape while the triangular protrusions and the triangular grooves are alternately repeated.

In the present invention, the nozzle body member includes a cylindrical upper nozzle body portion formed on an upper side, a cone-shaped middle nozzle body portion provided on a lower end portion of the upper nozzle body portion and having a gradually smaller diameter, And a lower nozzle body portion having a smaller diameter than the upper nozzle body portion and having a cylindrical shape, and the lateral groove portion may be formed on an inner peripheral surface of the upper nozzle body portion.

In the present invention, the inner circumferential surface of the nozzle body member may be formed with a laminar flow longitudinal groove portion extending to the lower end of the nozzle body member in the longitudinal direction on the lower side of the lateral groove portion.

In the present invention, the laminar flow forming longitudinal grooves are provided in a plurality of circumferentially spaced apart relation, and the laminar flow forming longitudinal grooves comprise: a first longitudinal groove provided on an inner circumferential surface of the intermediate nozzle body; And a second flute communicating with the first flute and provided in the lower nozzle body.

In the present invention, the lateral grooves may be formed so as to correspond to the boundary line between the upper nozzle body and the intermediate nozzle body, and may communicate with the laminar flow forming longitudinal groove at the boundary between the upper nozzle body and the middle nozzle body.

In the present invention, the lateral grooves may be formed in a spiral shape.

In the present invention, the lateral grooves may be spaced apart from the upper end of the nozzle body member and spaced apart from the laminar flow forming longitudinal grooves.

In order to achieve the above object, a nozzle for a welding torch according to the present invention is a nozzle for a welding torch which is disposed on an end side of a torch head of a welding torch and is coupled to an insulator or a gas diffuser of a torch head, Wherein the nozzle body member has a cylindrical upper nozzle body portion formed on the upper side, and the upper body portion of the upper nozzle body is formed on the lower side of the nozzle body member, A middle nozzle body portion of a cone shape provided at a lower end portion of the nozzle body portion and having a smaller diameter and a lower nozzle body portion provided at a lower end portion of the middle nozzle body portion and having a cylindrical shape with a smaller diameter than the upper nozzle body portion, The horizontal groove portion is formed on an inner circumferential surface of the upper nozzle body portion, and the upper nozzle body portion And the semi-circular protrusion and the semicircular groove are alternately repeated, and have a continuous shape, or alternatively, the triangular protrusion and the triangular groove are alternately repeated, and the inner peripheral surface of the inner peripheral surface of the nozzle body member And a plurality of the laminar flow forming longitudinal grooves are spaced apart from each other in the circumferential direction, and the upper nozzle body part and the lower nozzle body part, And a second flute communicating with the transverse groove at a boundary of the intermediate nozzle body and having a first flute provided at an inner circumferential surface of the intermediate nozzle body and a second flute provided at the lower nozzle body, .

The present invention has the effect of stabilizing the flow of the protective gas by forming the flow of the injected gas in the form of laminar flow and injecting a certain amount or more of the protective gas uniformly.

The present invention has the effect of securing a high weldability by stabilizing the flow of the protective gas and spraying uniformly during the welding operation, and improving the welding quality.

1 is a perspective view showing a nozzle for a welding torch according to the present invention;
2 is a cross-sectional perspective view showing one embodiment of a nozzle for a welding torch according to the present invention.
3 is a cross-sectional view showing another embodiment of a nozzle for a welding torch according to the present invention.
4 is a sectional view showing still another embodiment of a nozzle for a welding torch according to the present invention.
5 to 7 are cross-sectional views showing different embodiments of A-A 'in Fig. 3;

Hereinafter, the present invention will be described in more detail.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Prior to the detailed description of the present invention, terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary terms. Therefore, the embodiments described in this specification and the configurations shown in the drawings are merely the most preferred embodiments of the present invention and do not represent all the technical ideas of the present invention. Therefore, It is to be understood that equivalents and modifications are possible.

FIG. 1 is a perspective view illustrating a nozzle for a welding torch according to the present invention, and FIG. 2 is a cross-sectional perspective view illustrating an embodiment of a nozzle for a welding torch according to the present invention.

The nozzle for welding torch according to the present invention is disposed on the end side of the torch head of the welding torch, not shown, and is connected to the insulator or the gas diffuser of the torch head to inject the protective gas. And the protective gas flows between the outer circumferential surface and the outer circumferential surface of the end portion.

It is noted that the nozzle for welding torch according to the present invention can be applied to all TIG and MIG welders which are used in the present industrial field in a simple manner.

Referring to FIG. 1, a nozzle body member 10 having a shape penetrating in the longitudinal direction is included. The nozzle body member 10 may be formed to have a cylindrical shape.

The nozzle body member 10 includes a cylindrical upper nozzle body 11 formed on the upper side of the torch head, which is coupled to the insulator or the gas diffuser of the torch head, and a lower end of the upper nozzle body 11 A lower nozzle body 12 having a cylindrical shape with a diameter smaller than that of the upper nozzle body 11, a lower nozzle body 12 having a smaller diameter than the lower nozzle body 12, (Not shown).

The nozzle body member 10 flows smoothly into the lower nozzle body portion having the smallest diameter along the middle nozzle body portion inclined at the upper nozzle body portion 11 having the largest diameter in the nozzle body member 10 Thereby minimizing the generation of turbulence in the protective gas moving in the inside by injecting the air from the lower nozzle body.

2 is a cross-sectional perspective view showing one embodiment of a nozzle for a welding torch according to the present invention, FIG. 3 is a cross-sectional view showing another embodiment of a nozzle for a welding torch according to the present invention, and FIGS. 2 and 3 A lateral groove portion 100 is formed in the inner circumferential surface of the nozzle body member 10 in the circumferential direction and the lateral groove portion 100 includes a plurality of grooves continuous in the longitudinal direction.

2 shows that the transverse grooves 100 have a serrated shape, that is, a shape continuing successively while the triangular protrusions and the triangular grooves are alternately repeated.

The horizontal groove portion 100 is formed on the inner circumferential surface of the upper nozzle body 11.

The transverse grooves 100 are formed for coupling with the torch and can be modified in various ways for the connection with the torch.

In addition, on the inner circumferential surface of the nozzle body member 10, a laminar flow forming longitudinal groove portion 110 is formed on the lower side of the lateral groove portion 100 in the longitudinal direction.

The laminar flow forming longitudinal groove portion 110 is formed by extending to the lower end of the nozzle body member 10, that is, the jetting port side end where the protective gas is injected, and enables laminar flow formation in the protective gas to be injected.

The protection gas is injected along the laminar flow forming longitudinal groove portion 110 in the nozzle body member 10, thereby enabling laminar flow formation.

The plurality of laminar flow forming longitudinal grooves 110 are spaced apart from one another in the circumferential direction and include a first longitudinal groove 111 provided on an inner peripheral surface of the middle nozzle body 12, And a second vertical groove 112 provided in the lower nozzle body part 13.

In addition, the laminar flow forming longitudinal groove portion 110 is formed to communicate with the lateral groove portion 100, so that the protective gas can be directly introduced into the lateral groove portion 100.

The horizontal groove portion 100 is formed to correspond to a boundary line between the upper nozzle body 11 and the intermediate nozzle body 12 so that the upper nozzle body 11, Forming longitudinal groove portion 110 at a boundary between the laminar flow forming longitudinal groove portion 110 and the laminar flow forming longitudinal groove portion 110.

3 shows that the transverse grooves 100 have a wavy shape, that is, a shape continuing successively while the semicircular protrusions and the semicircular grooves are alternately repeated.

The horizontal groove portion 100 may be spaced apart from the upper end of the upper nozzle body 11 and may be spaced apart from the laminar flow forming longitudinal groove portion 110. That is, the lateral grooves 100 may not be connected to the laminar flow forming longitudinal grooves 110 but may be disposed separately.

Referring to FIG. 4, the transverse grooves 100 may be formed in a spiral shape.

The lateral groove portion 100 is spaced apart from the upper end of the upper nozzle body portion 11 and is spaced apart from the laminar flow forming longitudinal groove portion 110, And a third vertical groove 113 connecting the groove 111 and the horizontal groove 100.

5 to 7 are sectional views showing different embodiments of A-A 'in Fig. 3, Fig. 5 illustrates that the laminar flow forming longitudinal groove portion 110 has a semicircular shape, and Fig. 6 The laminar flow forming longitudinal trough 110 has a triangular shape. Fig. 7 illustrates that the laminar flow forming longitudinal trough 110 has a rectangular shape.

It is noted that the laminar flow forming longitudinal groove portion 110 has a semicircular shape, a triangular shape, and a quadrangular shape, and that various modifications such as a trapezoidal shape and the like are possible.

In the present invention, the flow of the jetting gas is formed into a laminar flow by the laminar flow forming longitudinal groove portion 110 formed in the nozzle body member 10, and the jetting gas is jetted to stabilize the flow of the protective gas, .

The present invention stabilizes the flow of the protective gas and uniformly injects the gas during the welding operation, thereby securing high weldability and improving welding quality.

It will be understood by those skilled in the art that various changes and modifications may be made without departing from the scope of the present invention.

10: nozzle body member 11: upper nozzle body
12: Middle nozzle body part 13: Lower nozzle body part
100: lateral groove portion 110: laminar flow forming vertical groove portion
111: first vertical groove 112: second vertical groove

Claims (12)

A nozzle for a welding torch which is disposed on an end side of a torch head of a welding torch and is coupled to an insulator or a gas diffuser of a torch head to emit a protective gas,
And a nozzle body member having a longitudinally penetrating shape,
Wherein a lateral groove portion is formed in an inner peripheral surface of the nozzle body member in a circumferential direction,
And a laminar flow longitudinal groove is formed on an inner circumferential surface of the nozzle body member at a lower side of the lateral groove portion in the longitudinal direction to a lower end of the nozzle body member. delete The method of claim 1,
And the laminar flow forming longitudinal groove portion is formed to communicate with the lateral groove portion. The method of claim 1,
Wherein the lateral grooves include a plurality of longitudinally spaced grooves. The method of claim 1,
Wherein the lateral groove portion has a shape continuously continuous with alternating semicircular protrusions and semicircular grooves, or has a shape continuously connected with alternating triangular projections and triangular grooves alternately. The method of claim 1,
The nozzle body member includes:
A cylindrical upper nozzle body formed on the upper side;
A cone shaped intermediate nozzle body portion provided at a lower end portion of the upper nozzle body portion and gradually decreasing in diameter; And
And a lower nozzle body portion provided at a lower end portion of the intermediate nozzle body portion and having a cylindrical shape smaller in diameter than the upper nozzle body portion,
Wherein the horizontal groove portion is formed on an inner peripheral surface of the upper nozzle body portion. The method of claim 6,
Wherein the middle nozzle body and the inner circumferential surface of the lower nozzle body are formed with a laminar flow longitudinal groove extending to the lower end of the lower nozzle body in the longitudinal direction at a lower side of the lateral groove. 8. The method of claim 7,
The plurality of laminar flow forming longitudinal grooves are spaced apart in the circumferential direction,
Wherein the laminar flow forming vertical groove portion comprises:
A first vertical groove provided on an inner peripheral surface of the intermediate nozzle body; And
And a second flute provided in the body of the lower nozzle so as to communicate with the first flute. 8. The method of claim 7,
Wherein the horizontal groove portion is formed in line with the boundary line between the upper nozzle body and the middle nozzle body so as to communicate with the laminar flow forming longitudinal groove at the boundary between the upper nozzle body and the middle nozzle body. The method of claim 1,
Wherein the horizontal grooves are formed in a spiral shape. The method of claim 1,
Wherein the horizontal groove portion is spaced apart from an upper end portion of the nozzle body member and is spaced apart from the laminar flow forming vertical groove portion. A nozzle for a welding torch which is disposed on an end side of a torch head of a welding torch and is coupled to an insulator or a gas diffuser of a torch head to emit a protective gas,
And a nozzle body member having a longitudinally penetrating shape,
A lateral groove portion is formed in an inner peripheral surface of the nozzle body member in the circumferential direction,
Wherein the nozzle body member includes a cylindrical upper nozzle body portion formed on an upper side, a cone-shaped middle nozzle body portion provided on a lower end portion of the upper nozzle body portion and having a smaller diameter, a lower nozzle body portion provided on a lower end portion of the middle nozzle body portion, And a lower nozzle body portion having a cylindrical shape smaller in diameter than the upper nozzle body portion,
The transverse groove portion is formed on an inner circumferential surface of the upper nozzle body portion and is formed so as to correspond to a boundary line between the upper nozzle body portion and the intermediate nozzle body portion. The transverse groove portion has a shape continuously continuous with alternating semicircular protrusions and semicircular grooves, The triangular grooves are alternately repeated and have a continuous shape,
Wherein the nozzle body member is formed on an inner circumferential surface of the nozzle body member so as to extend to an injection port side end portion at which a laminar flow forming longitudinal groove portion is longitudinally formed at a lower side of the lateral groove portion,
Wherein the plurality of laminar flow forming longitudinal grooves are spaced apart from each other in the circumferential direction and have a first longitudinal groove communicating with the transverse groove at a boundary between the upper nozzle body and the intermediate nozzle body and provided at an inner peripheral surface of the intermediate nozzle body, And a second flute provided in the body of the lower nozzle and connected to the first flute.
KR1020160000466A 2016-01-04 2016-01-04 Nozzle for gas welding torch KR101754919B1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112439964A (en) * 2019-08-30 2021-03-05 世合系统工程股份有限公司 Welding nozzle, method for producing the same and method for selectively welding components

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013202677A (en) * 2012-03-29 2013-10-07 Iwatani Internatl Corp Double gas-shielded arc welding method and torch used in the same

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013202677A (en) * 2012-03-29 2013-10-07 Iwatani Internatl Corp Double gas-shielded arc welding method and torch used in the same

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112439964A (en) * 2019-08-30 2021-03-05 世合系统工程股份有限公司 Welding nozzle, method for producing the same and method for selectively welding components

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