KR20080000040A - Arc welding lod keeping case improving the effect of the initial arc ignition and arc welding method thereof - Google Patents

Abstract

A container for storing arc welding rods having iron filings at the tip of the rod is provided to make an initial arc easily by magnetizing the tip of a rod for attaching iron filings in a radial direction. A container(10) for storing arc welding rods(3) includes a case having a space for storing a magnet to generate magnetic field, and a permanent magnet or an electromagnet which generates magnetic field. A method of easily generating arc includes a step of attaching iron filings at the tip of a selected rod, and a step of generating arc to perform a welding process after attaching iron filings.

Description

Arc welding lod keeping case improving the effect of the initial arc ignition and arc welding method

1 is a perspective view of the electrode storage box according to an embodiment of the present invention,

Figure 2 is a partial cross-sectional view of the electrode holder of Figure 1,

3 is a perspective view of the electrode storage box having a welding rod drying function as a modified embodiment of FIG. 1,

Figure 4 is a flow chart showing the processing of the welding method of the present invention,

FIG. 5 is a view showing an initial arc ignition phenomenon occurring when a conventional general electrode is fed at a constant speed.

6 is a view showing the initial arc ignition phenomenon that occurs when the iron is attached to the electrode with a constant speed by the method of the present invention.

Description of the main symbols in the drawings

10, 10 ': electrode holder

1, 11: case 2: permanent magnet

3: welding rod 4: iron

5: Magnetic generator storage

12: Cover 13: Power Supply Line

The present invention relates to arc welding, and more particularly, to an electrode storage box and a welding method for attaching iron to the tip of an electrode during arc welding to facilitate initial arc generation.

Typical welding methods include gas welding such as oxygen-acetylene gas welding (OAW) depending on the heat source; Arc welding such as SAMW (Shielded Metal Arc Welding), GTAW (Gas Tungsten Arc Welding), PAW (Plasma Arc Welding), GMAW (Gas Metal Arc Welding), and SAW (Submerged Arc Welding); Semi-arc welding such as electro-slag welding (ESW); It is classified into high energy welding such as electron beam welding and laser beam welding. In addition, generally used gas gas arc welding and gas tungsten arc welding.

Among them, the arc welding method is a method of joining a base material by using a high temperature arc generated by an electrical discharge between the electrode and the base material, and the welding rod or filler metal is transferred to the melting and the base material by the arc according to the method.

Among the welding methods described above, welding methods such as shield metal arc welding (SMAW) provide a consumable electrode coated with flux without a separate protective gas, so that an arc is generated at the tip thereof so that the volume is transferred to the molten area. Say The coated arc welding method is used in a wide range such as maintenance welding because the equipment is inexpensive, does not need a protective gas, can be used for electronic fine welding, and can be used anywhere.

However, unlike the other welding methods, welding methods such as the coated arc welding described above are not easy to ignite the initial arc during welding. Therefore, the welding should be performed after the ignition of the arc by scraping a welding rod on the base material or the ground part near the welding part to ignite the arc. I have a problem. In addition, when attempting to reuse the electrode after the low hydrogen electrode or the temporary welding, the initial arc generation is more difficult. For this reason, in order to facilitate the initial arc generation, the electrode is produced by coating an arc promoter on the tip of the electrode, but the effect is insufficient.

Therefore, in the present invention, in the case of the welding method requiring the initial arc ignition in the electrode, such as the coated arc welding method described above, the welding metal by localizing the current density of the tip to iron by radially attaching iron to the tip of the weld portion It is an object of the present invention to provide an electrode storage box and a welding method for facilitating the initial arc generation to easily generate an arc in the weld without scratching the electrode in the ground portion.

Electrode storage box for facilitating the initial arc generation of the present invention for achieving the above object, the case having a magnetic body generating portion for mounting the magnetic force generating body in the lower portion; It characterized in that it comprises a magnetic generator that is housed in the magnetic generator receiving portion.

The magnetic force generator may be composed of any one of a permanent magnet or an electromagnet.

The case includes a power supply line for receiving external power; A heating element connected to the power line to generate heat by electricity; By further comprising a cover for sealing the case may be configured to dry the low-hydrogen-based welding rods and the like.

The case may also mount iron on top of the magnetic generator housing.

Welding method for facilitating the initial arc generation of the present invention for achieving the above object, Iron selection process for attaching the iron to the tip of the electrode after selecting the electrode for each base material; And a welding process for performing welding by inducing arc generation after the iron adhesion process.

The iron attachment process may include a welding magnetization process for magnetizing the tip of the welding rod.

Alternatively, the iron adhesion process may include an iron molecule magnetization process to magnetize the iron powder attached to the tip of the electrode.

In the present invention described above, the iron powder preferably has a needle-like structure, and preferably has a length of 3 mm or less.

In the present invention described above, the welding includes all welding methods for performing welding by welding rods such as SMAW, SAW, and GMAW.

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.

1 is a perspective view of the electrode storage box according to an embodiment of the present invention, Figure 2 is a partial cross-sectional view of the electrode storage box of FIG.

1 and 2, the electrode storage box 10 according to an embodiment of the present invention, the case (1) having a variety of shapes, such as cylindrical or rectangular pillar type for storing and storing the electrode (3). Can be implemented.

As illustrated in FIG. 2, the case 1 has a magnetic generating body 5 formed at an inner lower portion thereof, and the magnetic generating body 5 has a permanent magnet 2 or an electromagnet (not shown in the drawing). And the like. Iron 4 may be stored and stored in an upper portion of the magnetic generator body 5 inside the case 1.

In the above-described configuration, the case 1 is preferably made of stainless steel, aluminum alloy, or the like, in order to prevent iron from being attached to the welding rod tip and to prevent iron from being attached to the case.

In addition, the size of the case (1) of the electrode storage box (10) for convenience of use, 1/2 ~ 2/3 of the length of the electrode is suitable, and attach the handle (14, 3) as shown in FIG. It is also preferable to.

The magnetic force generator described above may be embodied as a permanent magnet 2 or an electromagnet, and is formed in a circular or rectangular shape according to the shape of the case 1.

The electrode storage box 10 according to the present invention having the above-described configuration stores the electrode 3 in the electrode storage box to magnetize the tip of the electrode 3, or the iron stored inside the electrode case 1 is magnetized and stored. Iron is radially attached to the tip of the electrode 3, or the iron is radially attached to the tip of the electrode by storing the tip of the non-magnetized electrode 3 on the inner bottom surface of the electrode holder 10 and then taking it out.

The electrode storage box 10 of the present invention as described above may also be implemented as a welding rod dryer for storing and drying the electrode to be kept moisture content inside the flux, such as low-hydrogen-based welding rod. 3 is a perspective view of the electrode storage box 10 ′ implemented by the electrode dryer as described above as a modified embodiment of FIG. 1.

The electrode holder 10 'in the case where the electrode holder of the present invention is implemented by a welding rod dryer, as shown in FIG. 3, has a magnetic force generating body (see FIG. 2) and optionally iron contained therein. The power supply line 13 is provided with an external power supply, and the power supply line 13 is not shown in the drawing, but is installed inside the case 11 to generate heat by electricity supplied to the power supply line 13. Heating elements such as a nichrome wire and a heating heater to be performed are provided. In order to maintain the internal temperature of the case 11, a cover 12 is formed on the top of the case 11 to seal the case 11. Here, when the magnetic force generator is an electromagnet, the magnetic force generator may be configured to receive electrical energy from the power line.

The electrode storage bins 10 and 10 'of the present invention having the configuration as described above magnetizes the tip of the electrode 3 or the iron 4 to radially attach iron to the tip of the electrode 3 by magnetic force, Iron attached to the tip of the electrode 3 by magnetic force facilitates the initial arc generation during welding.

As described above, in order to facilitate the initial arc generation, the iron powder attached to the tip of the electrode 3 by magnetic force is preferably placed in an appropriate amount inside the electrode case 1, and is the same as the material of the electrode, It is more preferred to use the same components as the weld metal.

Figure 4 is a flow chart showing the processing of the welding method of the present invention.

The welding method of the present invention is characterized by facilitating initial arc generation by attaching iron radially to the tip of the electrode by magnetic force during welding. As shown in FIG. Performing the electrode selection process to select the (S11).

Afterwards, the iron adhesion process of radially attaching iron to the tip of the selected electrode by magnetic force is performed. The iron attachment process described above magnetizes the electrode tip or the iron by a welding magnetization process for magnetizing the tip of the welding rod or an iron magnetization process for magnetizing the iron.

At this time, the process of magnetizing the electrode tip is carried out by storing the electrode selected by the electrode selection process in the electrode storage box of the present invention as described in Figures 1 to 3.

And the process of magnetizing the iron is carried out by storing the iron contained in the electrode storage box of the present invention as described in Figures 1-3. In this case, iron is attached to the tip of the welding rod by inserting the welding rod into the welding rod storage box and taking it out (S12).

Next, after the iron attaching process as described above is performed, an initial arc by iron is generated by supplying the electrode 3 close to the base material while supplying electricity to the electrode and the base material, thereby arcing the core part of the electrode. When the welding is performed (S13).

5 is a view showing an initial arc ignition phenomenon caused by feeding a conventional general electrode at a constant speed. FIG. 6 is a view showing an initial arc ignition phenomenon caused by feeding a welding rod with iron powder at a constant speed according to the method of the present invention.

Referring to Figures 5 and 6 by comparing the initial arc ignition characteristics by supplying a welding electrode attached to the iron at the same speed by applying a common electrode and the residual magnetic field as follows.

As shown in FIG. 5, since an initial arc is not easily generated in the case of a general electrode (for example, E 4313), an electrical spark occurs instantaneously when the core part contacts the base material part (FIG. 5 (b)). The core part is attached to the base material so that the arc does not last (Fig. 5 (c)), and after the core part is attached to the base material, the temperature of the electrode increases due to the resistance, so that the coating material burns and generates smoke (Fig. 5 (d) The phenomenon often occurred.

However, as shown in FIG. 6, in the case of a welding rod (eg, E 4313) in which iron is radially attached to the tip of the welding rod using a residual magnetic field, the iron attached to the tip of the welding rod contacts the base metal. Iron with localized instantaneous current density facilitates the initial arc generation (Fig. 6 (b)), and then induces the arc of the electrode core wire to show the characteristic of the arc persisting (Fig. 6 (c)). gave.

The present invention described above localizes and increases the current density of the tip of the electrode by attaching iron to the tip of the electrode when initial arc ignition is required, such as a coated arc electrode, such that an arc can be generated without directly contacting or scratching the electrode. To improve the initial arc ignition performance.

The present invention described above also improves the welding efficiency by improving the initial arc ignition performance of the electrode as described above, thereby improving the welding efficiency, and providing the effect of improving the welding quality such as keeping the weld metal surface clean. do.

Claims (8)

A case having a magnetic body generating portion at a lower portion thereof; Storage box for facilitating the initial arc generation, characterized in that it comprises a; a magnetic generator that is received in the magnetic generator receiving portion. The electrode storage box of claim 1, wherein the magnetic generator is any one of a permanent magnet and an electromagnet. The method of claim 1, wherein the case, A power line receiving external power; A heating element connected to the power line to generate heat by electricity; Electrode storage box to facilitate the initial arc generation, characterized in that it further comprises; a cover for sealing the case. 4. The electrode storage box according to any one of claims 1 to 3, wherein the case is provided with iron attached to the tip of the electrode at an upper portion of the magnetic body generating portion. 5. The electrode storage box of claim 4, wherein the iron has a needle-like structure having a length of 3 mm or less. An iron attachment process of attaching iron to the tip of the electrode after selecting the electrode; And a welding process for performing welding by inducing arc generation after the iron adhesion process. 7. The welding method of claim 6, wherein the attaching of iron powder comprises a welding magnetization process for magnetizing the tip of the welding rod. The welding method of claim 6, wherein the iron adhesion process comprises an iron molecule magnetization process of magnetizing iron attached to the tip of the welding rod.

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