KR102228483B1 - Spatter Removing Device and Method for Arc Welding Torch - Google Patents

Abstract

Spatter of a simple welding torch nozzle that can sufficiently remove spatter, etc. attached to the nozzle in a short time without removing the nozzle from the tip of the welding torch, and can effectively suppress reattachment of the spatter. It provides a removal device and a method for removing spatter from a nozzle for a welding torch.
It has a mixing container, ceramic balls, and a spatter adhesion preventing agent, the spatter adhesion preventing agent includes a water-soluble cleaning agent, a heat-resistant coating agent, and a rust inhibitor, and a plurality of the ceramic balls and a spatter adhesion preventing agent in the mixing container Spatter removal device of the nozzle for welding torch, characterized in that is filled.

Description

Spatter removing device and method for removing spatter from nozzle for welding torch and method for removing spatter from nozzle for welding torch {Spatter Removing Device and Method for Arc Welding Torch}

The present invention relates to an apparatus and a method for removing spatter from a nozzle for a welding torch.

Conventional arc welding torch nozzles generally have a structure in which the periphery of a contact chip for guiding wire feeding is covered, and a cylindrical insulating nozzle is screwed onto the tip of the torch. Here, since spatter generated during welding is adhered to the tip of the nozzle for a welding torch, when the spatter adheres remarkably, it is necessary to remove the spatter by removing the nozzle or chip, or to replace it with a new one.

Here, as a method of removing spatter from the nozzle, a method of frequently applying various spatter adhesion inhibitors such as spray type, immersion type and paste type, or physically cutting and removing by contacting a cutting tool is known. have. However, since the nozzle is heated after welding, it is difficult to peel off the nozzle and perform a removal operation or the like.

On the other hand, for example, in Patent Document 1 (Japanese Patent Laid-Open No. 2003-71566), a rotating head driven by a rotating drive mechanism, a cylindrical body surrounding the rotating head, and a small diameter filled inside the cylindrical body. Disclosed is a cleaning apparatus for a nozzle for a welding torch, which is made of a steel ball, and in which a rotating head is rotatably positioned inside a cylinder, and a tip portion of the rotating head is constituted by a plurality of high elastic steel wires.

In the cleaning apparatus described in Patent Document 1, the steel ball is filled in the inside of the cylinder surrounding the rotating head, and the tip of the rotating head is composed of a high elastic steel wire such as a piano wire, so that the welding torch nozzle is used as a cylinder. By rushing to, the tip of the rotating head composed of a high elastic steel wire enters the gas passage portion of the nozzle, and when the tip of the rotating head enters, the steel ball together with the high elastic steel wire enter the gas passage portion. Therefore, by the rotation of the rotating head, the high-elastic steel wire is expanded by centrifugal force and contacts the inner circumferential surface of the gas passage formed in a tapered shape, or the steel balls that move together with the rotation of the high-elastic steel wire collide with the inner circumferential surface of the gas passage. Thus, it is said that spatter adhering to the inner surface of the gas passage is removed.

Japanese Unexamined Patent Publication No. 2003-71566

However, in the cleaning apparatus disclosed in Patent Document 1, the effect of removing spatter by the steel ball is not sufficient, and there is no effect of suppressing reattachment of spatter to the nozzle after cleaning.

In view of the problems in the prior art as described above, an object of the present invention is to sufficiently remove spatter, etc. attached to the nozzle in a short time without removing the nozzle from the tip of the welding torch. It is to provide an apparatus for removing spatter of a nozzle for a welding torch and a method for removing spatter of a nozzle for a welding torch, which can effectively suppress the reattachment of the motor.

In order to achieve the above object, the present inventors have conducted intensive research on a simple and efficient method for removing spatter, and as a result, in a container filled with ceramic balls and an anti-spatter adhesion agent, a heated nozzle immediately after the welding operation was placed. Having found that it is extremely effective to immerse, the present invention has been reached.

That is, the present invention has a mixing container, a ceramic ball, and an agent for preventing spatter adhesion,

The spatter adhesion prevention agent includes a water-soluble detergent, a heat-resistant coating agent, and a rust inhibitor,

A spatter removing apparatus for a nozzle for a welding torch, wherein the mixing container is filled with a plurality of the ceramic balls and the spatter adhesion preventing agent.

The number of ceramic balls to be filled in the mixing container can be appropriately determined by the inner volume of the mixing container and the diameter of the ceramic balls, and the number of ceramics that can sufficiently immerse the area where spatter from the nozzle is to be removed is made. It is good to fill the ball and spatter prevention agent into the mixing container.

When the tip of the welding torch nozzle, which has been heated by welding, is immersed in a mixing container filled with ceramic balls and spatter preventing agent, the aqueous solution contained in the spatter preventing agent boils and expands, resulting in large pressure. do. In the spatter removal apparatus for a nozzle for a welding torch of the present invention, the ceramic ball rotated by the pressure violently collides with the nozzle, so that spatter can be efficiently removed.

In addition, the anti-spatter agent filled in the mixing container contains a water-soluble detergent, a heat-resistant coating agent, and a rust inhibitor, and the nozzle is washed with a water-soluble detergent, and a heat-resistant coating film is formed on the surface of the nozzle by heat input from the nozzle. In addition, the anti-spatter agent, including rust inhibitors, improves the polishing and cutting properties of ceramic balls, promotes rotation of ceramic balls by good lubricity, and increases spatter removal effect and spatter adhesion prevention effect. Increase.

In addition, in the spatter removing apparatus for a nozzle for a welding torch of the present invention, the mixing container is filled with the porous ceramic balls (porous balls) and the dense ceramic balls (density balls). desirable.

Since the inside of the porous ball is filled with an aqueous solution, the aqueous solution boils and expands by immersing the tip of the heated welding torch nozzle, and the ceramic ball is violently rotated and sprayed in a random direction. That is, by using a ball made of porous ceramics, the effect of removing spatter can be increased.

Here, in the ceramic balls to be filled in the mixing container, the proportion of the porous balls is preferably 55 to 60% by mass. When the ratio of the porous balls is 55% by mass or more, a sufficient spatter removal effect can be expressed. On the other hand, the porous ball is more likely to be damaged compared to the dense ball, but long-term reliability of the spatter removal device can be ensured by making the proportion of the porous ball 60% by mass or less.

Further, in the spatter removal apparatus for a nozzle for a welding torch of the present invention, it is preferable that the diameter of the ceramic ball is 1 to 4 mm. When the diameter of the ceramic ball is 1 mm or more, a sufficient removal effect (polishing and grinding) can be exhibited for the nozzle with contamination such as spatter, and by setting it to 4 mm or less, the difference between the ceramic ball and the nozzle. A sufficient contact area can be secured.

Here, for a nozzle with an inner diameter of 12 to 22 mm, it is preferable to use a ceramic ball with a diameter of approximately 3 mm, and for a small nozzle or a tapered nozzle with an inner diameter of less than 12 mm, the diameter is approximately 2 It is preferable to use a ceramic ball having a diameter of mm, and for a large diameter nozzle having an inner diameter larger than 22 mm, it is preferable to use a ceramic ball having a diameter of approximately 4 mm. By using ceramic balls having these diameters for each nozzle of the inner diameter, the ceramic balls that have entered the nozzle can move smoothly, and spatter and the like can be efficiently removed.

In addition, in the spatter removal apparatus of the nozzle for a welding torch of the present invention, it is preferable that the main component of the ceramic ball is alumina. The material of the ceramic ball is not particularly limited as long as the effect of the present invention is not impaired, and various conventionally known ceramic materials can be used, but by using alumina as the main component, a spatter removing device such as cutting performance and durability It can meet all of the required characteristics. In addition, variations such as denseness and porosity can be easily adopted.

In addition, the present invention,

Using the spatter removing device of the nozzle for a welding torch of the present invention,

A method for removing spatter from a nozzle for a welding torch, characterized in that the nozzle for a welding torch immediately after the welding operation is immersed in the spatter removing device is also provided.

As described above, the distal end of the welding torch nozzle after the welding operation is in a high temperature state, and it is difficult to remove the nozzle with spatter or the like attached thereto. On the other hand, the spatter removal method of the nozzle for a welding torch of the present invention actively uses the high temperature state, and spatter, etc. can be removed without removing the nozzle.

Specifically, when the tip of the welding torch nozzle is immersed in a mixing container filled with a ceramic ball and a spatter prevention agent, the aqueous solution contained in the spatter adhesion prevention agent boils and expands, thereby generating a large pressure. In the spatter removal method of the nozzle for a welding torch of the present invention, the spatter can be removed extremely effectively by colliding with the spatter attaching portion of a ceramic ball that rotates and moves at high speed under the pressure.

In addition, after the nozzle is washed with a water-soluble detergent, since a heat-resistant coating film is formed on the surface of the nozzle by heat input from the nozzle, adhesion of spatter to the nozzle in subsequent use can be suppressed.

In the spatter removal method of the nozzle for a welding torch of the present invention, it is preferable to use robot welding for the welding operation, and to teach the robot in advance as a series of motions following the welding operation. Do. By regularly immersing the tip of the nozzle for a welding torch in the spatter removing device, it is possible to carry out a welding operation with a nozzle in a good condition at all times. In addition, by teaching the above operation to the robot in advance, it is possible to automate the welding operation and the spatter removal operation.

According to the present invention, without removing the nozzle from the tip of the welding torch, the spatter attached to the nozzle can be sufficiently removed in a short time, and the reattachment of spatter can be effectively suppressed, and a simple welding torch It is possible to provide an apparatus for removing spatter from a nozzle and a method for removing spatter from a nozzle for a welding torch.

1 is a schematic perspective view of a spatter removing apparatus for a nozzle for a welding torch according to the present invention.
2 is an overview photograph of a nozzle before and after sputtering.
3 is an overview photograph during spatter removal operation.

Hereinafter, exemplary embodiments of a spatter removal apparatus for a welding torch nozzle and a spatter removal method for a welding torch nozzle of the present invention will be described in detail with reference to the drawings, but the present invention is not limited thereto. On the other hand, in the following description, the same reference numerals are assigned to the same or corresponding parts, and duplicate descriptions may be omitted. Further, since the drawings are for conceptually explaining the present invention, the dimensions and ratios of the displayed components may be different from those of the actual ones.

(1) Spatter removal device for welding torch nozzles

1 is a schematic perspective view of a spatter removing apparatus for a nozzle for a welding torch according to the present invention. The spatter removing device 1 has a mixing container 2, a ceramic ball 4, and a spatter adhesion preventing agent 6, and the ceramic ball 4 and a spatter adhesion preventing agent 6 It is filled in the mixing container 2.

The shape and size of the mixing vessel 2 are not particularly limited as long as the tip of the nozzle for welding torch can be sufficiently immersed, but for example, it should be made into a cylindrical shape having an inner diameter of 8 to 10 cm and a height of 8 to 10 cm. I can.

Further, the material of the mixing container 2 may be appropriately determined from the viewpoints of strength, corrosion resistance, heat resistance, durability, weight and cost, but it is preferable to use insulating resin or stainless steel.

The filling amount of the ceramic ball 4 and the spattering preventing agent 6 may be such that the tip of the welding torch nozzle can be sufficiently immersed. Here, for example, when a cylindrical container having an inner diameter of 9 cm and a height of 9 cm is used as the mixing container 2, 800 g of ceramic balls 4 and 100 cc of spatter adhesion preventing agent 6 may be filled.

As for the ceramic ball 4, it is preferable that a porous ceramic ball (porous ball) and a dense ceramic ball (dense ball) are mixed, and the ratio of the porous ball is more preferably 55 to 60% by mass. . By setting the ratio of the porous balls to 55% by mass or more, a sufficient spatter removal effect can be expressed. On the other hand, the porous ball is more likely to be damaged compared to the dense ball, but the long-term reliability of the spatter removing device 1 can be ensured by making the ratio of the porous ball 60% by mass or less.

Further, it is preferable that the diameter of the ceramic ball 4 is 1 to 4 mm. When the diameter of the ceramic ball 4 is 1 mm or more, a sufficient removal effect (polishing and grinding) can be exhibited for the nozzle with contamination such as spatter, and by making it 4 mm or less, it is possible to obtain a ceramic ball and A sufficient contact area with the nozzle can be secured.

Here, for a nozzle having an inner diameter of 12 to 22 mm, it is preferable to use a ceramic ball 4 having a diameter of approximately 3 mm, and for a small nozzle or a tapered nozzle having an inner diameter of less than 12 mm, the diameter is approximately 2 mm. It is preferable to use a ceramic ball 4 of, and for a large diameter nozzle having an inner diameter of more than 22 mm, it is preferable to use a ceramic ball 4 having a diameter of approximately 4 mm. By using ceramic balls having these diameters for each nozzle of the inner diameter, the ceramic balls that have entered the nozzle can move smoothly, and spatter and the like can be efficiently removed.

It is preferable that the main component of the ceramic ball 4 is alumina. The material of the ceramic ball 4 is not particularly limited as long as the effect of the present invention is not impaired, and various conventionally known ceramic materials can be used. It is possible to meet all of the characteristics required for the removal device (1). In addition, variations such as denseness and porosity can be easily adopted.

As an example of optimizing the mixing ratio of ceramic balls having various materials and shapes from the viewpoint of spatter removal effect for ceramic balls 4, porous alumina balls: 55 to 60% by mass (for general cutting) ), balls obtained by plastically bonding the abrasive with a clay binder: 35 to 30% by mass (for light cutting), and balls made of dense alumina: 10% by mass (for polishing) can be suitably used.

The spatter adhesion prevention agent 6 contains a water-soluble detergent, a heat-resistant coating agent, and a rust inhibitor. The content of each of these components is not particularly limited as long as the effect of the present invention is not impaired, and may be appropriately determined according to the desired spatter removal effect, re-adhesion suppression effect, or the like. Here, the components of the suitable anti-spattering agent (6) and their content are "surfactant nonionic vegetable oil/castor oil/aqueous solution: 55% by mass, isopropanol amine aqueous solution: 15% by mass, and rust inhibitor aqueous solution: 15 Mass%, preservative: 1 mass%, paintable heat-resistant oil aqueous solution: 14%" can be illustrated.

The water-soluble detergent has an effect of cleaning the nozzle, and a heat-resistant coating film is formed on the nozzle surface by the heat-resistant coating agent. In addition, the anti-spatter agent, including rust inhibitors, improves the polishing and cutting properties of ceramic balls, and promotes rotation of ceramic balls by good lubricity, thereby improving spatter removal effect and spatter adhesion prevention effect. Increase.

(2) How to remove spatter from welding torch nozzle

The spatter removal method of the nozzle for a welding torch of the present invention is to remove contamination such as spatter attached to the nozzle by using the spatter removal device of the nozzle for a welding torch of the present invention. By immersing the nozzle immediately after the welding operation in the spatter removing device 1, spatter and the like attached to the nozzle can be efficiently removed.

As described above, the nozzle after the welding operation is in a high temperature state, and it is difficult to remove the nozzle to which spatter or the like is attached. On the other hand, in the spatter removal method of the welding torch of the present invention, it is possible to remove spatter and the like without removing the nozzle by actively using the high-temperature state.

Specifically, when the tip of the welding torch nozzle is immersed in the mixing container 2 filled with the ceramic ball 4 and the spatter preventing agent 6, the aqueous solution contained in the spatter preventing agent 6 will be It boils and expands, and a large pressure is generated. In the spatter removal method of the nozzle for a welding torch of the present invention, the ceramic ball 4 rotating and moving at high speed by the pressure collides with the spatter attachment portion of the nozzle, so that the spatter can be removed extremely effectively. have.

In addition, since the nozzle is cleaned with a water-soluble detergent, a heat-resistant coating film is formed on the surface of the nozzle by heat input from the nozzle, it is possible to suppress the adhesion of spatter to the nozzle in subsequent use. In addition, since the nozzle is cooled, the following welding operation can be performed using a nozzle in a state close to room temperature.

In addition, in the spatter removal method of the nozzle for a welding torch of the present invention, robot welding is used for the welding operation, and subsequent to the welding operation, the immersion of the nozzle into the spatter removing device 1 is performed by the robot as a series of operations. It is desirable to teach in advance. By regularly immersing the tip of the nozzle for a welding torch in the spatter removing device 1, it is possible to perform welding work with a nozzle in a good condition at all times. In addition, by teaching the above operation to the robot in advance, it is possible to automate the welding operation and the spatter removal operation.

Although consumption of the ceramic ball 4 is small, since spatter removed from the nozzle accumulates, it is preferable to remove the spatter using a magnet about once a month. In addition, when the amount of the spatter adhesion preventing agent 6 decreases due to adhesion to the nozzle or evaporation, it is desirable to appropriately supply it.

On the other hand, in recent years, it is difficult to use a spatter adhesion prevention device or a reamer type nozzle cleaner that is widely used exclusively for robot welding. However, by using the spatter removal device 1 of the present invention, these nozzles can be Attached spatter can also be easily removed. In addition, since the spatter removing device 1 is small and lightweight, it can be easily moved.

When performing spatter removal or the like by a conventional method for robot welding, it is common to perform cleaning once after, for example, 10 minutes of continuous welding. In this case, the time required for the cleaning (application of the anti-spatter agent and removal of spatter) is 3 to 5 minutes. On the other hand, in the spatter removal method of the welding torch nozzle of the present invention, the process time can be greatly reduced in order to exert an equal or higher effect by simply immersing the nozzle in the spatter removal device 1 for several seconds. have.

In addition, if a water-insoluble anti-spatter agent is applied to a nozzle at a high temperature, casting occurs, and deterioration of the working environment due to the casting becomes a problem, but the spatter removal method of the nozzle for a welding torch of the present invention In this case, since the softening does not occur, the working environment can be improved.

As described above, representative embodiments of the present invention have been described, but the present invention is not limited only to these, and various design changes are possible, and all of these design changes are included in the technical scope of the present invention.

[Example]

<< Example 1 >>

Using a welding machine manufactured by Daihen Co., Ltd., a welding operation for approximately 20 minutes was performed on a steel plate having a thickness of 6 to 19 mm. On the other hand, the welding current was 250 to 270 A, the welding voltage was 25 V, and a Φ 1.2 mm welding wire was used. Further, the inner diameter of the welding torch nozzle was 19 mm, and a CO ₂ ·Ar mixed gas was flowed as a shield gas at a flow rate of 20 L/min. Immediately after the welding operation, the high-temperature welding torch nozzle was immersed in the spatter removal device for 5 seconds while being connected to the welding torch, and the spatter adhesion state of the nozzle was observed visually.

Here, as the spatter removing device, a cylindrical stainless steel container (inner diameter: 9 cm, height: 9 cm) filled with ceramic balls having a diameter of 3 mm and an agent for preventing spatter adhesion was used. The ceramic balls were mixed with a porous alumina ball: 60% by mass, a ball obtained by plastically bonding an abrasive with a clay binder: 30% by mass, and a dense alumina ball: 10% by mass.

In addition, the components and content of the anti-spattering agent are surfactant nonionic vegetable oil/castor oil/aqueous solution: 55% by mass, isopropanol amine aqueous solution: 15% by mass, rust inhibitor aqueous solution: 15% by mass, preservative: 1% by mass, Paintable heat-resistant oil agent aqueous solution: It was set as 14%.

No spatter adhered to the nozzle after the spatter removal operation was performed. On the other hand, the ``welding work and spatter removal work'' was set as one stroke, and spatter was attached to the nozzle at three points after the three strokes, but spatter removal work (immersion) was additionally performed twice. , The spatter was completely removed. Fig. 2 shows an overview photograph of the nozzle before and after sputtering.

<< Example 2 >>

Using a welding machine manufactured by Panasonic Co., Ltd., the shield gas is used as CO ₂ gas (flow rate: 20 L/min), and welding operation takes approximately 18 minutes (6 welding operations for 1 minute are 1 process, 3 continuous processes) Except having performed, it carried out similarly to Example 1, and the welding operation and the spatter removal operation were performed. When the nozzle after the spatter removal operation was visually confirmed, no spatter adhesion was found.

<< Example 3 >>

Using a welding machine manufactured by Panasonic Co., Ltd., the shield gas is CO ₂ gas (flow rate: 25 L/min), and about 25 minutes of welding work (welding 25 nuts temporarily fixed to the cylinder head) at a welding voltage of 35 V. Except what was done, it carried out similarly to Example 1, and the welding work and the spatter removal work were performed. When the nozzle after the spatter removal operation was visually confirmed, no spatter adhesion was found. In addition, the "welding operation and spatter removal operation" was set to one stroke, and spatter adhesion was not found even in the nozzle after four strokes.

<< Example 4 >>

A steel plate with a thickness of 9 mm is welded, the nozzle inner diameter is 16 mm, the welding current is 300 A, the welding voltage is 32 V, the welding speed is 300 mm/min, and the shield gas is CO ₂ gas (flow rate: 15 L/min). 150 mm of welding was performed using. After three lines of welding, the spatter removal operation was performed, and the operation was continued until the total time for welding reached 6 minutes. Fig. 3 shows an overview photograph during the spatter removal operation. When the nozzle after the above operation was visually confirmed, no spatter adhesion was found. On the other hand, the used spatter removing device is the same as in Example 1.

From the above results, by using the spatter removal apparatus for the welding torch nozzle and the spatter removal method for the welding torch nozzle of the present invention, spatter attached to the nozzle in a short time without removing the nozzle from the tip of the welding torch. It can be seen that the etc. can be sufficiently removed, and furthermore, reattachment of spatter can be effectively suppressed.

1: spatter removal device
2: mixing container
4: ceramic ball
6: Spatter adhesion prevention agent

Claims (7)

It has a mixing container, a ceramic ball, and an anti-spatter agent,
The spatter adhesion preventing agent,
It includes a water-soluble detergent, a heat-resistant coating agent, and a rust inhibitor,
The ceramic ball includes a porous ceramic ball (porous ball) and a dense ceramic ball (density ball),
A spatter removing apparatus for a welding torch nozzle, wherein the mixing container is filled with a plurality of the ceramic balls and the spatter adhesion preventing agent. The method of claim 1,
The spatter removing apparatus for a nozzle for a welding torch, wherein in the ceramic balls, the proportion of the porous balls is 55 to 60% by mass. The method according to claim 1 or 2,
The spatter removing apparatus for a nozzle for a welding torch, wherein the diameter of the ceramic ball is 1 to 4 mm. The method according to claim 1 or 2,
A spatter removing device for a nozzle for a welding torch, wherein the main component of the ceramic ball is alumina. Using the spatter removing device of the nozzle for a welding torch according to claim 1 or 2,
A method for removing spatter from a nozzle for a welding torch, characterized in that the nozzle for a welding torch immediately after the welding operation is immersed in the spatter removing device. The method of claim 5,
Using robot welding for the welding operation,
Continuing the welding operation, a method for removing spatter from a nozzle for a welding torch, wherein the immersion is taught in advance to a robot as a series of motions. delete

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