KR102162603B1 - Portable welding machine - Google Patents

Abstract

The present invention relates to a portable welding machine. According to the present invention, the portable welding machine comprises: one or more battery units for supplying direct current power; an inverter unit for converting the direct current power into alternating current power; a welding machine unit connected to the inverter unit and having a welding torch; and a connection terminal box. According to the present invention, welding defects can be minimized.

Description

Portable welding machine

The present invention relates to a portable welding machine, and in detail, it is mounted on an excavator, a forklift, etc., and has portability to perform welding work whenever necessary, and a welding wire is supplied through the center, and an inert gas such as carbon dioxide is supplied to the outside. It relates to a portable welding machine provided with a gas jet guide for a jet welder.

Welding means applying heat or pressure, or heat and pressure to metal materials at the same time to make them bonded together, and occupies an important weight in various industrial fields such as shipbuilding industry and manufacturing various machines.

In general, welding is performed by supplying a consumable welding wire at a constant speed and applying a predetermined current to generate an arc between the welding wire and the base material.

Welding quality varies according to the skill level of the operator, and it is important to prevent welding defects from occurring. If there is a welding defect in the welding area, it may cause a problem in the safety of the structure.

CO2 welding or MIG welding has a feature that welding defects can be reduced by using an inert gas to block the welding area from the outside.

That is, by performing welding while ejecting an inert gas such as carbon dioxide, it is possible to prevent the molten metal from being oxidized or nitrided because it does not contact the atmosphere, and welding to aluminum, copper, stainless steel, etc. in addition to iron is possible.

Carbon dioxide welding, which has the advantage of improving welding quality, consumes a large amount of carbon dioxide, and thus has adverse effects when considering environmental aspects such as global warming.

For example, when welding is performed using a conventional carbon dioxide welding torch, it is known that about 46 liters of carbon dioxide is consumed per hour.

The main configuration of a general carbon dioxide welding torch is a diffuser is assembled into a cylindrical nozzle, a tip is inserted in the front of the diffuser, and a gas pipe is connected to the rear. In addition, the welding rod injected through the gas pipe is moved to the inside of the tip to generate an arc between the base material, and carbon dioxide is moved to the nozzle and is sprayed while surrounding the welding part.

A plurality of holes are formed along the outer surface of the diffuser to which the tip is connected, and carbon dioxide is discharged through the hole to move to the end of the nozzle to form a shield surrounding the welding area.

However, in the case of the prior art, there is a problem in that the hole is formed so as to be ejected at a right angle toward the inner diameter surface of the nozzle, so that excessive turbulence is formed inside the nozzle, and due to this, there is a problem that a certain pattern of shield cannot be formed when sprayed to the nozzle end .

In addition, in order to form a stable shield, the pressure of the injected carbon dioxide must be high, but there is also a problem that it is not helpful to increase the pressure of the ejected carbon dioxide because it is primarily struck at a right angle to the inner diameter surface of the nozzle.

In particular, in the case of a general carbon dioxide torch, there is a problem in that the shield is often destroyed by the wind when welding is performed on a windy day, resulting in poor welding.

In the case of a conventional welding torch, spatter may fall and adhere to a diffuser during upward welding, especially when welding upwards, or a hole in which carbon dioxide is injected may be blocked. Due to this, there is a problem that the life of the diffuser decreases and the welding defect rate increases.

On the other hand, heavy equipment that can change or replace operating modules such as excavators and forklifts requires welding work for module replacement. It is necessary to develop a welding machine with enhanced portability in order to increase the efficiency of heavy equipment use by directly welding parts that require frequent welding repairs such as teeth of an excavator bucket.

In view of the above-described contents, looking at the prior art, a'carbon dioxide welding machine torch' is disclosed in Korean Utility Model Registration No. 20-0231297, and has a relatively simple structure, and the manufacturing cost is low and there is no consumption of tips, In order to provide a torch for a carbon dioxide welding machine that can prevent deterioration of usability due to fusion of the slag generated in welding to the tip or nozzle and improve productivity, in this prior document, in the carbon dioxide welding torch, a hole penetrating the inside is The front side is provided with a threaded portion on the inner side, and the rear side is integrally formed by a diffuser and ceramic with an assembly portion, and discloses that a nozzle having a tip formed therein is assembled with the diffuser, but it is difficult to solve the above problems. There was this.

Republic of Korea Utility Model Registration No. 20-0231297

An object of the present invention for solving the above problems is a welding machine that uses an inert gas such as carbon dioxide gas to wrap around a welding part during welding, so that the inert gas forms a double shield film so as to minimize welding defects. It is to provide a gas ejection guide for welding machines.

Another object of the present invention is to provide a portable welding machine that is easy to carry in order to be provided in heavy equipment that frequently requires welding repair, such as an excavator and a forklift.

The problems to be solved by the present invention are not limited to the problems mentioned above, and other problems to be solved by the present invention not mentioned here are those of ordinary skill in the technical field to which the present invention belongs from the following description. Will be clearly understood.

In the portable welding machine according to an embodiment of the present invention for solving the above problems, it is easy to carry and can be provided in heavy equipment, and in a portable welding machine in which a gas ejection guide is provided on a welding torch, at least one is provided to supply DC power. And a battery part, an inverter part connected to the battery part and converting DC power supplied by the battery part into AC power, and a welding part connected to the inverter part and provided with a welding torch,

In the form of a rectangular box, storage compartments are provided in the upper and lower floors, the battery part is accommodated in the lower floor, the inverter part is accommodated in the upper floor, and a through part through which wires can pass is provided in the partition separating the upper and lower layers. And, an opening provided on one side of the upper layer of the connection terminal box to allow wires to pass therethrough, a plurality of fastening clamps provided outside the connection terminal box, and fixedly provided on one side of the heavy equipment, and fastened with the fastening clamp part to the Further comprising a fixing kit for fixing the connection terminal box,

The welding machine portion is provided with a gas ejection guide for a welding torch using an inert gas, and the gas ejection guide has a handle connection portion formed at a rear end, a body portion having a welding tip coupling portion formed at the front end, and the welding tip coupling portion A plurality of gas injection ports are formed while forming a virtual circle on the outer surface, and the gas injection ports include a first injection port and a second injection port alternately formed in different positions.

In the portable welding machine according to the present invention, the first injection port and the second injection port are alternately formed while forming a virtual circle while the gas injection ports are in different positions in the welding tip coupling part. 2.Since the gas film is formed at the same time, it is possible to prevent destruction of the shield film due to the influence of wind, etc., thus improving the welding quality.

The portable welding machine according to the present invention has the effect of providing a portable welding machine that is easy to carry through a connection terminal box storing a battery and an inverter.

1 shows an overall conceptual diagram according to an embodiment of a portable welding machine according to the present invention.
2 shows the configuration of a connection terminal box according to an embodiment of the portable welding machine according to the present invention.
3 is a perspective view of a gas ejection guide according to an embodiment of the portable welding machine according to the present invention.
4 is a perspective view showing a gas ejection guide according to an embodiment of the portable welding machine according to the present invention.
5 is a front view showing a welding tip coupling portion provided in a gas ejection guide according to an embodiment of the portable welding machine according to the present invention.
6 is a front view of a gas guide pipe coupled to an inside of a welding tip coupling part in a gas ejection guide according to an embodiment of the portable welding machine according to the present invention.
7 is a cross-sectional view illustrating a welding tip coupling portion of a gas ejection guide according to an embodiment of a portable welding machine according to the present invention.
FIG. 8 is an exemplary view showing that a double shield film is formed by a first injection port and a second injection port provided in a gas discharge guide according to an embodiment of the portable welding machine according to the present invention.

Specific matters, including the problems to be solved, means for solving the problems, and effects of the present invention as described above, are included in the following examples and drawings. Advantages and features of the present invention, and a method of achieving them will become apparent with reference to the embodiments described below in detail together with the accompanying drawings.

The portable welding machine according to the present invention, as shown in Figs. 1 to 8, is easy to carry and can be provided in heavy equipment, and in a portable welding machine in which a gas ejection guide is provided in a welding torch, at least one is provided to supply DC power A battery unit (1) that is connected to the battery unit (1), an inverter unit (2) that converts DC power supplied from the battery unit (1) into AC power, and the inverter unit (2) Consisting of including a welding part (3) provided with a welding torch,

In the form of a rectangular box, storage compartments are provided on the upper and lower floors, the battery unit 1 is accommodated on the lower floor, the inverter unit 2 is accommodated on the upper floor, and the partition separating the upper and lower layers has a wire. A connection terminal box 4 provided with a penetrating through part 41, an opening 42 provided on one side of an upper layer of the connection terminal box 4 to allow wires to pass through, and an outside of the connection terminal box 4 Further comprising a plurality of fastening clamp portions 43 and a fixing kit (not shown) fixedly provided on one side of the heavy equipment and fastened with the fastening clamp portion to fix the connection terminal box 4,

The welding machine part 3 is provided with a gas discharge guide for a welding torch using an inert gas, and the gas discharge guide has a handle connection part 6 formed at the rear end, and a welding tip connection part 7 formed at the front end. A body part 5 is provided, a plurality of gas injection ports are formed while forming a virtual circle on the outer surface of the welding tip coupling part 7, and the gas injection ports have a first injection port 71 and a second injection port having different positions. It may be configured including that the injection holes 72 are formed alternately.

First, as shown in FIG. 1, at least one battery unit 1 may serve to supply DC power.

Specifically, it is preferable that two 12V-standard batteries are provided at 250Ah to supply 24V DC power.

Next, as shown in FIG. 1, the inverter unit 2 is connected to the battery unit 1 through an electric wire to convert the DC power supplied from the battery unit 1 into an AC power source. do.

The inverter unit 2 is a device that converts DC power into AC power having a variable voltage / variable frequency, and may include a converter unit that converts commercial AC power into DC power.

Next, as shown in FIG. 1, the welding machine part 3 is connected to the inverter part 2 through an electric wire, and a welding torch is provided.

Specifically, the portable welding machine according to the present invention is an inverter welding machine, and the power used for the welding machine unit 3 is a welding power source converted from several khz to tens of khz high-frequency AC, and can be obtained from the inverter unit 2. .

In addition, a separate AC 220V/60Hz terminal may be further provided on the inverter unit 2. The terminal is a configuration provided to expand the utility of the power source for other purposes than welding, and has the advantage of being able to use it immediately by connecting a device requiring power by carrying it without adding any other components.

Specifically, it can be used directly at the work site by connecting a compressor or the like.

Next, as shown in Fig. 2, the connection terminal box 4 has a storage cap divided into an upper layer and a lower layer in the form of a rectangular box, and the battery unit 1 is accommodated in the lower layer, and the upper layer The inverter unit 2 is accommodated in the unit, and a through part 41 through which an electric wire can pass may be provided in a partition separating the upper and lower layers.

In addition, a folding handle may be further provided at the upper end of the connection terminal box 4.

The foldable handle is a configuration for convenient movement of the connection terminal box 4, and may be provided in any form as long as it can withstand the weight of the connection terminal box 4 and is easy to grip.

In addition, the opening 42 is provided on one side of the upper side of the connection terminal box 4 to allow the wire to pass to the outside.

Terminal modules provided in the inverter unit 2 can be utilized through the opening 42, and the inverter unit 2 and the welding machine unit 3 are formed to be connected by wires through the opening 42. .

A plurality of fastening clamp portions 43 may be provided outside the connection terminal box 4.

Specifically, it is preferable that a total of eight fastening clamp portions 43 are provided in four directions, two each on one outer surface of the connection terminal box 4.

The fixing kit (not shown) is fixedly provided on one side of the heavy equipment, and is fastened to the fastening clamp part 43 to fix the connection terminal box 4.

Specifically, the heavy equipment may be an excavator, a forklift, etc., and the connection terminal box 4 is strongly fastened to the fixing kit (not shown) fixed to one side of the heavy equipment, so that the connection terminal box when moving or operating the heavy equipment It is preferable that (4) is not removed.

In addition, it is preferable that a welding machine fixing part is further provided on the outer side of the connection terminal box 4. This is a configuration for enhancing portability and usability by being able to move together by fixing the welder part 3 to the connection terminal box 4.

In addition, a welding machine storage box in the form of a rectangular box may be further provided to accommodate the welding machine part 3 and fastened to the welding machine fixing part.

That is, the battery unit 1 and the inverter unit 2 are accommodated in the connection terminal box 4, and the welder unit 3 is accommodated in the welding machine storage box, so that equipment for welding can be transferred at once. . In addition, since the connection terminal box 4 is fastened and fixed to the fixing kit (not shown), it can be mounted on heavy equipment and used conveniently when necessary.

In particular, the tooth parts of the excavator bucket often require welding repair in the field, but since the excavator can be operated with welding equipment loaded, there is an effect of increasing work efficiency.

On the other hand, as shown in Figs. 3 to 4, the welding machine part 3 is provided with the gas ejection guide for a welding torch using an inert gas, and the gas ejection guide uses an inert gas such as a carbon dioxide welding torch. It is suitable for use in a welding torch, and the main component is a body part 5, a handle connection part 6 formed at the rear end of the body part 5, and a welding tip connection part 7 at the front end of the body part 5 ) Is formed. On the other hand, a nozzle (not shown) is connected to the outer surface of the body portion 5 so that the nozzle surrounds a welding tip (not shown) that is coupled to the welding tip coupling portion 7.

And, as shown in Figs. 4 to 5, a plurality of gas injection ports are formed while forming a virtual circle along the outer surface of the welding tip coupling part 7, and in particular, the gas injection ports include the first injection port 71 and the second injection port. It consists of the injection port 72, the first injection port 71 and the second injection port 72 may be formed alternately while changing positions.

That is, the first injection orifices 71 are arranged to form one virtual circle, and the second injection orifices 72 are arranged to form another virtual circle while being different from the first injection orifice 71.

7 to 8, the inside of the welding tip coupling part 7 coupled to the body part 5 is made of an empty space, and the supplied inert gas is the first injection port 71 and the second It is injected toward the front through the injection port 72, and the inert gas is ejected through the first injection port 71 and the second injection port 72 having different positions, so that the first gas film and the second gas film may be formed at the same time. .

In order to form the two shield layers, the first injection ports 71 form a virtual circle smaller than the second injection ports 72. In other words, it means that the diameter of the virtual circle formed by the second injection ports 72 is larger than the diameter of the virtual circle formed by the first injection ports 71.

During welding, a lot of welding defects, called blowholes, occur, and in this case, there is a problem in that the defective part must be removed through gouging and the welding work must be performed again, and it is most important to reduce the incidence of welding defects to increase work efficiency .

For this purpose, an inert gas such as carbon dioxide is ejected during welding to provide protection for the welding part.In general, the welding work is performed in a state in which one shield film is formed, so that the shield film is easily formed due to external influences such as wind. There was a problem of being destroyed.

Accordingly, in the present invention, the gas injection port through which the inert gas is ejected is formed of a dual structure of the first injection port 71 and the second injection port 72, so that a second gas film is formed outside the first gas film to form a double shield film. Therefore, stable welding is possible and welding defects can be minimized.

On the other hand, as shown in Fig. 7, the first injection port 71 and the second injection port 72 are formed to penetrate from the inside of the welding tip coupling portion 7 toward the outer surface, and form a predetermined inclination angle to spray inert gas. When the shielding film is spread out and sprayed.

More preferably, as shown in FIG. 5, the first injection port 71 and the second injection port 72 have injection grooves 73 along the outer surface of the welding tip coupling part 7. That is, not a simple hole, but a recessed injection groove 73 connected to the ejection port along the outer surface of the welding tip coupling portion 7 to stably guide the ejected inert gas is formed.

In particular, the injection groove 73 connected to the first injection port 71 is formed to the end of the welding tip coupling portion 7, and the injection groove 73 connected to the second injection port 72 is a welding tip coupling portion ( 7) It will not reach the end.

In addition, it is preferable that the first injection port 71 and the second injection port 72 are formed at the same angle so as to be parallel to each other.

And, as shown in Figure 6, the gas guide pipe 8 is coupled to the inner center of the welding tip coupling portion 7, and the gas guide pipe 8 is coated with aluminum to prevent current from being energized. desirable. A male screw 81 is formed at one end of the gas guide pipe 8 to be fastened at the inner center of the welding tip coupling part 7, and the center of the gas guide pipe 8 becomes a path through which the welding wire moves. , A space is formed between the outer diameter of the gas guide pipe 8 and the inner diameter of the body 5 so that the inert gas flows and is ejected through the first injection port 71 and the second injection port 72.

As described above, it will be understood that the technical configuration of the present invention described above can be implemented in other specific forms without changing the technical spirit or essential features of the present invention by those skilled in the art.

Therefore, the embodiments described above are to be understood as illustrative and non-limiting in all respects, and the scope of the present invention is indicated by the claims to be described later rather than the detailed description, and the meaning and scope of the claims and the All changes or modifications derived from the equivalent concept should be interpreted as being included in the scope of the present invention.

1: battery part
2: inverter unit
3: Welding donation
4: connection terminal box
41: through part
42: opening
43: fastening clamp part
5: body part
6: handle connection
7: Welding tip coupling part
71: injection port 1
72: 2nd injection port
73: injection groove
8: gas induction pipe
81: male thread

Claims (5)

delete delete In a portable welding machine that is easy to carry and can be equipped with heavy equipment, and a gas ejection guide is provided on the welding torch,
A battery unit provided at least one to supply DC power;
An inverter unit connected to the battery unit and configured to convert DC power supplied by the battery unit into AC power;
A welding machine part connected to the inverter part and provided with a welding torch; And
In the form of a rectangular box, storage compartments are provided in the upper and lower floors, the battery part is accommodated in the lower floor, the inverter part is accommodated in the upper floor, and a through part through which wires can pass is provided in the partition separating the upper and lower layers. Including ;,
The connection terminal box has an opening provided on one side of the upper floor to allow wires to pass through, a plurality of fastening clamps provided outside the connection terminal box, and fixedly provided on one side of the heavy equipment, and fastened to the fastening clamp part to connect the connection Including a fixing kit for fixing the terminal box,
A gas ejection guide for a welding torch using an inert gas is provided in the welding part,
The gas ejection guide has a handle connection portion formed at a rear end, a body portion having a welding tip coupling portion formed at a front end thereof, a plurality of gas ejection openings forming a virtual circle on the outer surface of the welding tip coupling portion, and the gas ejection opening Is a portable welding machine, characterized in that the first injection port and the second injection port having different positions are formed alternately. The method of claim 3,
When an inert gas is ejected from the first injection port and the second injection port, the first gas film and the second gas film are formed at the same time. The method of claim 4,
The first injection ports form a virtual circle smaller than the second injection ports, and an injection groove connected to the first injection port and the second injection port is formed on the outer surface of the welding tip coupling part, and the injection of the first injection port The groove extends to the end of the welding tip coupling portion, and a gas guide pipe is coupled to an inner center of the welding tip coupling portion.

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