KR101171766B1

KR101171766B1 - Welding torch for co2 gas welding system

Info

Publication number: KR101171766B1
Application number: KR20100028589A
Authority: KR
Inventors: 이문용; 이영주
Original assignee: 주식회사 성우하이텍
Priority date: 2010-03-30
Filing date: 2010-03-30
Publication date: 2012-08-07
Also published as: KR20110109044A

Abstract

The present invention applies the gas nozzle of the welding torch as a fixed nozzle fixed to the torch body, and a variable nozzle capable of varying its length with respect to the fixed nozzle, thereby eliminating interference with the weld according to the shape of the welding base material, and the welding base material. It provides a welding torch for carbon dioxide gas welder to improve the welding quality by maintaining a constant distance between the wire and the wire.

Description

Welding torch for carbon dioxide gas welding machine {WELDING TORCH FOR CO2 GAS WELDING SYSTEM}

The present invention relates to a welding torch for a carbon dioxide gas welder, and more particularly, to a carbon dioxide that varies the length of a gas nozzle according to the shape of a welded portion to prevent interference with the welded portion, and to allow the wire to be positioned exactly regardless of the product shape. A welding torch for a gas welder.

In general, carbon dioxide (CO ₂ ) welding releases carbon dioxide gas (CO ₂₎ , which is an inert gas, to cut off the welding part from the atmosphere, and the wire is fed therein to produce a welding base material and a discharge phenomenon using the electrode as a welding. It is a way.

In particular, CO ₂ welding is used as a method of joining a clogged structure in which the welding gun cannot enter due to the characteristics of the body structure, and is equipped with an automated system using a robot.

1 is an overall configuration diagram of a general carbon dioxide gas welding machine, in which a welding torch 5 is mounted at the tip of an arm 3 of a robot 1, and a conveying pipe from a wire drum 7 is provided inside the welding torch 5. It is configured to be supplied with the wire (9) through (15).

In addition, the welding torch 5 is connected through the carbon dioxide tank 11 and the gas pipe 13 is configured to receive the carbon dioxide (CO ₂ ) to be discharged toward the welding portion.

In the welding using the carbon dioxide gas welding machine, the matching state of the wire 9 and the welded portion, the feeding speed of the wire, proper current and voltage adjustment, and the like have a significant influence on the welding quality.

And the said welding torch 5 is equipped with the torch body 21, as shown in FIG.

The torch body 21 forms a space S inside the upper part, and a step motor 23 is installed inside the space S.

The left feeding roller 27 is mounted on the rotating shaft 25 of the step motor 23, and the right feeding roller 29 is adjacent to the left feeding roller 27 through the roller bracket 31 to provide a space S. ) It is mounted on the inner surface.

In addition, the supply passage (L) for supplying the wire (9) in the up and down direction is formed in the torch body (21).

In addition, the body cover 33 is bolt-mounted on the upper portion of the torch body 21, and a supply passage L is formed inside the body cover 33 to guide the wire 9.

A welding tip 37 is mounted to the lower portion of the torch body 21 through a connection block 35. A supply passage L is also formed in the connection block 35 and the welding tip 37 to form a wire 9. Is guided to the weld (W).

In addition, a gas nozzle 39 surrounds the welding tip 37 on the outside of the welding tip 37, and is mounted below the torch body 21.

One end of the gas nozzle 39 is connected to an end of a gas pipe 13 connected to a carbon dioxide gas tank 11 (see FIG. 1) to a gas supply chamber 41 between the welding tip 37 and the gas nozzle 39. It is configured to supply carbon dioxide gas.

However, the welding torch 5 for the conventional carbon dioxide gas welder as described above is a gas nozzle 39 is fixed to the torch body 21 is composed of a single tube of a fixed length, bar interference according to the shape of the welding base material In order to avoid the weld 9, the welding is performed in a state in which the wire 9 is not matched to the right position, which causes the welding quality to deteriorate.

Therefore, the present invention has been invented to solve the above disadvantages, the problem to be solved by the present invention is a fixed nozzle which is fixed to the torch body of the gas nozzle of the welding torch, and its length can be varied with respect to the fixed nozzle It is to provide a welding torch for carbon dioxide gas welder to improve the welding quality by applying the variable nozzle to eliminate the interference with the welding part according to the shape of the welding base material, and to maintain a constant distance between the welding base material and the wire.

The welding torch for the carbon dioxide gas welding machine of the present invention for realizing the technical problem as described above comprises a feed roller which rotates by a step motor in the space portion by forming a space portion inside the upper portion, and the wire in the vertical direction. A torch body forming a supply passage for supplying a torch, a body cover mounted on an upper portion of the torch body for supplying the wire along a supply passage, and a wire supplied through a connecting block to a lower portion of the torch body for welding; In the welding torch for a carbon dioxide welder, comprising a welding tip for guiding in and surrounding the outside of the welding tip, the gas pipe is connected to one side is mounted to the lower portion of the torch body,

The gas nozzle is a fixed nozzle fixed to the lower portion of the torch body; A variable nozzle installed to be slipperably fitted inside the fixed nozzle; Fixing means is configured between the fixed nozzle and each side of the variable nozzle for fixing the slip in the vertical direction of the variable nozzle with respect to the fixed nozzle; Comprising between the other side of the fixed nozzle and the variable nozzle is characterized in that it comprises a guide means for fixing the slip in the rotational direction of the variable nozzle with respect to the fixed nozzle, and limiting the variable length in the vertical direction.

The fixing means is a ball stopper is installed on the lower side of the outer peripheral surface of the fixed nozzle; Characterized in that it consists of a plurality of stopper grooves formed so that the ball of the ball stopper can be inserted along the upper side of the outer peripheral surface of the variable nozzle.

The ball stopper includes a spherical ball; A fastening end formed at one side of an outer circumferential surface of the fixed nozzle so as to support a portion of the ball so as to protrude inwardly, and being formed on an outer circumferential surface of the circumference of the support hole; A spring housing fastened to the fastening end; The spring is inserted into the housing, characterized in that made of a spring to elastically support the ball to the support hole side.

In addition, the spring housing is characterized in that the screwed into the inside of the fastening end.

The spring may be made of a coil spring.

And the guide means is a guide hole formed in the longitudinal direction on the other side of the outer peripheral surface of the fixed nozzle; It is characterized by consisting of a guide protrusion which is configured to be guided along the guide hole is configured on the other end of the outer peripheral surface of the variable nozzle.

According to the welding torch for carbon dioxide gas welder according to the present invention as described above, the welding base material by applying the gas nozzle of the welding torch as a fixed nozzle fixed to the torch body, and a variable nozzle whose length can be varied with respect to the fixed nozzle By eliminating the interference with the welding part according to the shape of this, it is possible to weld by always maintaining a constant gap between the welding base material and the wire, thereby improving the welding quality of the weld, thereby preventing product defects, productivity It is effective to improve.

1 is an overall configuration diagram of a general carbon dioxide gas welding machine.
2 is a cross-sectional view of a welding torch according to the prior art.
3 is a cross-sectional view of a welding torch according to an embodiment of the present invention.
4 and 5 is a state diagram used in the welding torch according to the embodiment of the present invention.

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

However, in describing the configuration of the present invention, the same components as in the conventional configuration will be described with the same reference numerals.

First, the structure of the welding torch 5 for carbon dioxide gas welders of this embodiment is provided with the torch body 21, as shown in FIG.

A welding tip 37 is mounted to the lower portion of the torch body 21 through a connection block 35. A supply passage L is also formed in the connection block 35 and the welding tip 37 to form a welding wire ( And 9) to weld (W).

One end of the torch body 21 forms a gas passage GL so that an end of the gas pipe 13 connected to the carbon dioxide tank 11 (see FIG. 1) is connected to the welding tip 37 and the gas nozzle 39. It is comprised so that a carbon dioxide gas may be supplied to the gas supply chamber 41 in between.

Here, the gas nozzle 39 is of a variable type, the length of which is variable, the fixed nozzle (39a) is fixed to the lower portion of the torch body 21 and the slip nozzle is fitted to be installed inside the lower portion of the fixed nozzle (39a). It consists of a variable nozzle 39b.

And between each of the fixed nozzle (39a) and the variable nozzle (39b) of the fixed means 40 for fixing the slip in the vertical direction of the variable nozzle (39b) to the fixed nozzle (39a) is configured, the fixed Guide means for limiting the variable length in the vertical direction while fixing the slip in the rotational direction of the variable nozzle (39b) relative to the fixed nozzle (39a) between the nozzle (39a) and the other side of the variable nozzle (39b) ( 50).

First, the fixing means 40 is a ball stopper 42 installed on one side of the lower peripheral surface of the fixing nozzle 39a and a ball 43 of the ball stopper 42 along the upper one side of the outer peripheral surface of the variable nozzle 39b. It consists of three stopper grooves 44 formed to be insertable.

Here, three or more stopper grooves 44 may be configured as necessary, and only two of the stopper grooves 44 may be configured.

In addition, the ball stopper 42 has a spherical ball 43 and is provided at a lower side of the outer circumferential surface of the fixed nozzle 39a so that a part of the ball 43 is supported in a protruding state therein. A 45 is formed, and a fastening end 46 is formed on an outer circumferential surface of the support hole 45.

In addition, a spring housing 47 is fastened to the fastening end 46, and the ball 43 is elastic to the support hole 45 in the state in which the spring housing 47 is inserted into the spring 48. Configured to support.

Here, the spring housing 47 is preferably screwed to the inner peripheral surface of the fastening end 46, the spring 48 is made of a coil spring.

On the other hand, the guide means 50 has a predetermined section guide hole 51 is formed along the lengthwise direction on the other side of the outer peripheral surface of the fixed nozzle (39a), the guide hole 51 on the upper end of the outer peripheral surface of the variable nozzle (39b) Guide protrusions 53 fitted to be guided along) are integrally configured.

Therefore, in the welding torch 5 for the carbon dioxide gas welder having the above-described configuration, as shown in FIG. 4, the welded base member 60 is flat in shape, and thus there is no fear of interference by the gas nozzle 39. For (W), the length of the variable nozzle (39b) to the fixed nozzle (39a) as long as possible to induce the inert gas for welding to be supplied as close as possible to the welding portion (W).

On the other hand, as shown in FIG. 5, the weld nozzle W is a shape of the welding base material 60 having a perpendicular gap, so that the welding portion W is susceptible to interference by the gas nozzle 39. By minimizing the length of 39b), rather than supplying an inert gas for welding as close as possible to the welding portion (W), the welding state of the wire 9 to the welding portion (W) is guided as stable as possible to ensure the welding quality.

As such, the length adjustment of the variable nozzle 39b with respect to the fixed nozzle 39a is performed by manually pushing or pulling the variable nozzle 39b with respect to the fixed nozzle 39a. The ball stopper 42 is moved and inserted with respect to the ball 43 to fix the variable nozzle 39b to the fixed nozzle 39a.

5: welding torch 9: wire
21: torch body 23: step motor
27,29: feed roller 37: welding tip
39: gas nozzle 39a, 39b: fixed nozzle, variable nozzle
40: fixing means 42: ball stopper
44: stopper groove 50: guide means
51: guide hole 53: guide protrusion
60: welding base material

Claims

A torch body formed on both sides of a feed roller which rotates by a step motor in the space part by forming a space inside the upper part, and forming a supply passage for supplying a wire in a vertical direction; Body cover for supplying the wire along the supply passage, and a welding tip for guiding the wire to be supplied to the welding portion mounted through the connecting block in the lower portion of the torch body, and wraps the outer side of the welding tip, one side is connected to the gas pipe In the welding torch for carbon dioxide gas welder consisting of a gas nozzle which is mounted on the lower part of the torch body,
The gas nozzle is
A fixed nozzle fixed to the lower portion of the torch body;
A variable nozzle installed to be slipperably fitted inside the fixed nozzle;
Fixing means is configured between the fixed nozzle and each side of the variable nozzle for fixing the slip in the vertical direction of the variable nozzle with respect to the fixed nozzle;
Carbon dioxide gas, characterized in that between the fixed nozzle and the other side of the fixed nozzle is fixed in the rotational direction of the variable nozzle with respect to the fixed nozzle, and at the same time includes a guide means for limiting the variable length in the vertical direction Welding torch for welder.

In claim 1,
The fixing means
A ball stopper installed at one side of an outer circumferential surface of the fixed nozzle;
A welding torch for a carbon gas welder, comprising: a plurality of stopper grooves formed to be insertable into a ball of a ball stopper along an upper side of an outer circumferential surface of the variable nozzle.

In claim 2,
The ball stopper
Spherical balls;
A fastening end formed at one side of an outer circumferential surface of the fixed nozzle so as to support a portion of the ball so as to protrude inwardly, and being formed on an outer circumferential surface of the circumference of the support hole;
A spring housing fastened to the fastening end;
And a spring to elastically support the ball toward the support hole in a state inserted into the spring housing.

4. The method of claim 3,
The spring housing
The welding torch for the carbon dioxide welder, characterized in that the screwing to the inside of the fastening end.

4. The method of claim 3,
The spring is
A welding torch for a carbon dioxide gas welding machine, comprising a coil spring.

In claim 1,
The guide means
A guide hole formed in a longitudinal direction on the other side of the outer circumferential surface of the fixed nozzle;
The welding torch for the carbon dioxide welder, characterized in that the guide projection is configured to be guided along the guide hole is configured on the other end of the outer peripheral surface of the variable nozzle.