KR20160069650A - Wire feeding device - Google Patents

Abstract

The present invention relates to a wire feeding device capable of contributing to productivity improvement by preventing time loss caused by manual conversion and difficulty in comprising equipment per welding method, when it is necessary to perform welding by changing the welding method in a work site. The wire feeding device may include: a main body which is supplied with electricity and a gas from a welding power supply device; a wire reel shaft comprised at one side of the main body; a wire feeding part comprised at another side of the main body to correspond to the wire reel shaft; and a common torch connection part installed at the wire feeding part so as to fasten a TIG welding torch and an MIG welding torch selectively.

Description

[0001] Wire feeding device [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wire feeding apparatus, and more particularly, to a wire feeding apparatus that enables a TIG welding function and a MIG welding function to be commonly used.

Generally, the arc welding system is composed of a welding power supply unit and a wire feeding unit. One side of the wire feeding unit is provided with a welding torch for performing an actual welding operation. The welding power supply unit is connected to a welding torch As shown in Fig.

The arc welding system may be a combination of TIG welding (TIG welding) and MIG welding (Metal Inert Gas welding). When arc welding is to be carried out on the base material of the welding target, first of all, preliminary welding is performed on the welding base material by using a welding torch for TIG welding by the TIG welding method, and then, The welding of the chaebol is performed on the preliminary welding part of the base material by using the welding torch for the MIG welding.

In such an arc welding system, an arc is generated by a DC power supply voltage. A positive (+) polarity voltage is applied to a welding torch of the welding apparatus to which the TIG welding system is applied, and a positive polarity voltage is applied to the welding base material (+) Polarity is applied to the welding torch of the welding apparatus to which the MIG welding method is applied, and a voltage of (-) polarity is applied to the welding base material.

Although it is necessary to perform rough welding according to the TIG welding method and chivalrous welding according to the MIG welding method for a single welding base material, in order to completely proceed the welding, a TIG welding type welding device and a MIG welding type welding device Respectively.

The arc welding system has a wide range of applications because welding can be performed at a work site such as a structure, a building or a ship drying place from the ground without moving the equipment if the welding cable is extended long.

As described above, in order to be able to perform welding at a place remote from the welding power supply, the wire feeder adjusts the volume value of the voltage and current or performs the switch on / off operation for welding.

However, such a conventional wire feeding apparatus is capable of only welding torch connection for MIG welding, so that even though a single welding base material needs to be subjected to two-layer and three-layer welding according to the TIG welding method and MIG welding method And a welding apparatus of the TIG welding type and a welding apparatus of the MIG welding type have to be separately provided in order to proceed the welding completely.

DISCLOSURE Technical Problem The present invention has been made to solve various problems including the above problems, and it is an object of the present invention to provide a welding apparatus and a welding method capable of reducing the inconvenience of separately providing each welding apparatus by using a TIG welding function and a MIG welding function, Which can be utilized as a wire feeding apparatus and a wire feeding method. However, these problems are exemplary and do not limit the scope of the present invention.

According to an aspect of the present invention, there is provided a wire feeder comprising: a main body for receiving power and gas from a welding power supply; A wire reel shaft provided at one side of the main body; A wire feeding part provided on the other side of the body so as to correspond to the wire reel shaft; And a common torch connection part provided on the wire feeding part to selectively fasten the TIG welding torch and the MIG welding torch.

According to an aspect of the present invention, the common torch connecting portion includes a groove receiving portion formed with a receiving space corresponding to the TIG welding torch or the SIN head portion of the MIG welding torch; And a catching screw installed in the groove receiving portion so as to be engaged with the TIG welding torch inserted into the groove receiving portion or the neck portion of the MIG welding torch, .

According to an aspect of the present invention, the TIG welding torch and the male head of the MIG welding torch may include a direction fixing portion so as to be fastened in a predetermined direction to prevent twisting rotation.

According to an aspect of the present invention, the direction fixing portion may be formed by selecting at least one of a D-CUT, a key groove, and a spline groove.

According to an aspect of the present invention, the TIG welding torch or the MIG welding torch can be selectively installed on the other side of the main body, and can be selectively fastened to the TIG welding torch or the MIG welding torch. A common gas connection capable of selectively supplying gas; And a TIG welding torch or another MIG welding torch which is installed on the other side of the main body and is selectively fastened to the TIG welding torch or the MIG welding torch and can selectively apply a control signal to the TIG welding torch or the MIG welding torch. Which may include a common control connection.

According to an aspect of the present invention, the apparatus may further include a controller installed in the main body and provided with a switch capable of selecting at least one of a TIG welding mode, a gouging welding mode, and a MIG welding mode.

According to an aspect of the present invention, there is provided a control unit for a TIG welding torch or a MIG welding torch, which is installed in the main body and is connected to the common control connection unit of the main body, As shown in FIG.

According to one embodiment of the present invention as described above, the TIG welding function and the MIG welding function are commonly used, thereby reducing the inconvenience of separately providing each welding apparatus, The wire feeder can be implemented. Of course, the scope of the present invention is not limited by these effects.

1 is an external perspective view schematically illustrating a wire feeding apparatus according to some embodiments of the present invention.
2 to 3 are cross-sectional views schematically showing a wire feeding apparatus according to some embodiments of the present invention.
4 to 5 are cross-sectional views schematically showing a common torch connection of a wire feeder according to some embodiments of the present invention.
6 to 7 are cross-sectional views schematically showing a direction fixing portion of a wire feeder common torch connection portion according to some embodiments of the present invention.
8 is a cross-sectional view schematically showing a control unit of a wire feeder according to some embodiments of the present invention.
9 is a cross-sectional view schematically showing a control section in which a welding mode of a wire feeding apparatus according to some embodiments of the present invention is automatically selected.

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

The embodiments of the present invention are described in order to more fully explain the present invention to those skilled in the art, and the following embodiments may be modified into various other forms, The present invention is not limited to the embodiment. Rather, these embodiments are provided so that this disclosure will be more thorough and complete, and will fully convey the concept of the invention to those skilled in the art. In the drawings, the thickness and size of each layer are exaggerated for convenience and clarity of explanation.

It is to be understood that throughout the specification, when an element such as a film, region or substrate is referred to as being "on", "connected to", "laminated" or "coupled to" another element, It will be appreciated that elements may be directly "on", "connected", "laminated" or "coupled" to another element, or there may be other elements intervening therebetween. On the other hand, when one element is referred to as being "directly on", "directly connected", or "directly coupled" to another element, it is interpreted that there are no other components intervening therebetween do. Like numbers refer to like elements. As used herein, the term "and / or" includes any and all combinations of one or more of the listed items.

Although the terms first, second, etc. are used herein to describe various elements, components, regions, layers and / or portions, these members, components, regions, layers and / It is obvious that no. These terms are only used to distinguish one member, component, region, layer or section from another region, layer or section. Thus, a first member, component, region, layer or section described below may refer to a second member, component, region, layer or section without departing from the teachings of the present invention.

Also, relative terms such as "top" or "above" and "under" or "below" can be used herein to describe the relationship of certain elements to other elements as illustrated in the Figures. Relative terms are intended to include different orientations of the device in addition to those depicted in the Figures. For example, in the figures, when the element is turned over, the elements depicted as being on the upper surface of the other elements are oriented on the lower surface of the other elements. Thus, the example "top" may include both "under" and "top" directions depending on the particular orientation of the figure. If the elements are oriented in different directions (rotated 90 degrees with respect to the other direction), the relative descriptions used herein can be interpreted accordingly.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the singular forms "a," "an," and "the" include singular forms unless the context clearly dictates otherwise. Also, " comprise "and / or" comprising "when used herein should be interpreted as specifying the presence of stated shapes, numbers, steps, operations, elements, elements, and / And does not preclude the presence or addition of one or more other features, integers, operations, elements, elements, and / or groups.

Hereinafter, embodiments of the present invention will be described with reference to the drawings schematically showing ideal embodiments of the present invention. In the figures, for example, variations in the shape shown may be expected, depending on manufacturing techniques and / or tolerances. Accordingly, the embodiments of the present invention should not be construed as limited to the particular shapes of the regions illustrated herein, but should include, for example, changes in shape resulting from manufacturing.

FIG. 1 is an external perspective view schematically showing a wire feeding apparatus 100 according to some embodiments of the present invention, and FIGS. 2 to 3 are sectional views schematically showing the wire feeding apparatus 100 of FIG.

1, a wire feeding apparatus 100 according to some embodiments of the present invention includes a main body 10, a wire reel shaft 20, a wire feeding portion 30, A common torch connection portion 40, a control portion 50, a common gas connection portion 60, and a common control connection portion 70.

More specifically, for example, as shown in FIG. 1, the main body 10 is supplied with power and gas from the welding power supply device P, and is composed of the above-described wire reel shaft 20, It is possible to provide a welding machine with appropriate strength and durability capable of sufficiently supporting the wire feeding section 30, the common torch connection section 40, the control section 50, the common gas connection section 60 and the common control connection section 70 The frame structure may be a frame structure.

For example, the body 10 may be an integral injection structure, or a frame structure formed by welding or connecting castings, plate materials of various shapes, wire materials, pipe materials, vertical members, horizontal members and inclined members.

However, the main body 10 is not necessarily limited to Fig. 1, and various members having various shapes capable of supporting the above-described components can be applied.

For example, as shown in FIG. 1, the wire reel shaft 20 is provided on one side of the main body 10, and can load wires necessary for MIG welding.

Here, the wire is a thin metal wire wound in a coil shape used for welding. The wire is usually circular in cross section, but may have a rectangular band shape, and is mainly used for automatic and semi-automatic welding.

1, the wire feeding portion 30 is provided on the other side of the main body 10 so as to correspond to the wire reel shaft 20, and is connected to the wire reel shaft 20 The stored wire can be sent to the common torch connection portion 40. [

1, the common torch connection portion 40 is formed in the main body 10 so that the TIG welding torch T and the MIG welding torch M can be selectively engaged with each other. In addition, as shown in FIG. 1, And the MIG welding torch head portion 43 is detached from the common torch connection portion 40 when switching from MIG welding to TIG welding

The TIG welding torch male head 42 can be inserted into the common torch connection portion 40. [

1, the wire feeding apparatus 100 according to some embodiments of the present invention is provided on the other side of the main body 10 and includes a TIG welding torch head 42, Or MIG welding torch head 43 and is provided with a common gas connection 60 capable of selectively supplying gas to the TIG welding torch T or the MIG welding torch M, And a TIG welding torch (T) or a MIG welding torch (M), which is installed on the other side of the main body (10) and can be selectively fastened to the TIG welding torch And a common control connection unit 70 capable of selectively applying a control signal to the welding torch M. [

More specifically, for example, the common control connection unit 70 separates the control line of the MIG welding torch M from the common control connection unit 70 when switching from MIG welding to TIG welding, The control line of the welding torch T can be inserted into the common control connection part 70. [

Therefore, the wire feeder 100 can jointly connect the MIG welding torch M and the TIG welding torch T due to the common torch connection portion 40 and the common control connection portion 70 .

Therefore, the wire feeder 100 according to some embodiments of the present invention can commonly use the TIG welding torch or the MIG welding torch M, It can alleviate the inconvenience and can utilize the space efficiently.

8, the wire feeding apparatus 100 according to some embodiments of the present invention is installed in the main body 10 and includes at least a TIG welding mode, a gouging welding mode, a MIG welding mode And a control unit 50 in which a switch 51 for selecting any one of the modes is installed.

The control unit 50 includes an inching switch for driving the wire feed motor, a voltage adjustment volume switch for setting a pulse voltage and a pulse TIG base current, a display window for displaying the amount of output voltage, welding CO2, TIG, gouging, A current regulating volume switch for setting the MMA current and the pulse TIG peak current, and a display window for indicating the amount of the output current.

Therefore, when the switch 51 capable of selecting the welding mode is switched to the control unit 50, the purge gas is injected into the gas line for a few seconds to remove the remaining CO2 gas, A negative voltage is applied to the TIG welding torch T and a voltage of positive polarity is applied to the welding base material through the common gas connection part 60. [

Therefore, the wire feeding apparatus 100 according to some embodiments of the present invention can select a welding mode through the control unit 50 provided in the main body 10, The inconvenience of moving to the power supply device P can be alleviated, and the efficiency of the operation can be increased.

9, the wire feeder 100 according to some embodiments of the present invention may be installed in the main body 10 and may include a TIG welding torch or a MIG welding torch (50) in which any one of the modes is automatically selected when the control connection portion of the main body (M) is connected to the common control connection portion (70) of the main body (10).

A sensor for recognizing the shape of the control connection part of the TIG welding torch T and the MIG welding torch M different from each other may be provided in the common control connection part 70, When the control connection portion of the torch (T) and the MIG welding torch (M) are brought into contact with the common control connection portion (70), a sensor for recognizing the electrical characteristic or the magnetic characteristic of each torch is installed, .

Therefore, when the control connection part of the TIG welding torch (T) or the MIG welding torch (M) is inserted into the common control connection part (70), the welding mode is automatically switched and the purge gas The TIG welding torch T is supplied with Ar gas through the common gas connection part 60 and a voltage of negative polarity is applied to the TIG welding torch T, And a voltage of positive polarity may be applied to the welding base material.

Therefore, in the wire feeder 100 according to some embodiments of the present invention, when the control connection portion of the TIG welding torch T or the MIG welding torch M is inserted into the common control connection portion 70 The welding mode can be automatically selected, thereby reducing the inconvenience of moving to the welding power supply device P for switching the welding mode and increasing the efficiency of the operation.

The welding power supply device P may be constituted by a PWM control unit for controlling power supply operation according to a plurality of welding modes of the system and an inverter power supply unit for generating a power of the selected welding mode under the control of the PWM control unit have.

The PWM control unit may include a control signal generator for arc welding for generating each specific PWM control signal for a specific welding operated on an external selection switch to control various kinds of inverter power supply units, a CO₂ / MAG / MIG welding A control signal generator for DC-TIG welding, a control signal generator for AC / DC TIG welding, and a control signal generator for plasma cutting.

The PWM control unit may include PWM control signal terminals to generate a control signal of a predetermined duty cycle to control the operation of the inverter power supply unit.

The inverter power supply unit includes a rectifier for rectifying the AC input power, a DC / DC inverter for operating in accordance with the PWM control signal, a transformer for generating a low voltage and a high current, A selection switch for selecting a voltage output from the rectifier in accordance with PWM control signals and a DC voltage source for outputting the DC voltage from the rectifier to the DC TIG welder, the AC / DC tungsten inert gas welder and the plasma cutters. And a high-pressure generating unit for generating the high-pressure generating unit.

In addition, the welding power supply device P may include a valve that can automatically supply the type of the protective gas to the inside or the outside of the apparatus in accordance with the selection of the welding method.

Herein, the protective gas serves to prevent the oxidation of the welding portion and stabilize the arc. In the case of TIG welding, the protective gas is usually an inert gas such as Ar gas. In MIG welding, the protective gas usually uses CO 2 gas. An Ar + CO2 gas mixture can be used.

Here, the TIG welding process is called 'tungsten inert gas welding' and is also referred to as tungsten inert arc welding. It is a welding method to prevent oxidation nitrification by covering the arc with an inert gas (inert gas such as helium or argon gas), and can generally be used for welding non-ferrous metals. In addition, the welded portion of the TIG welding method can obtain a beautiful metal surface, and by using tungsten as an electrode, a welding rod is supplied from the side and welded, so that the electrode is not consumed. In the case of positive polarity of direct current, it can be used for welding of copper alloy or the like, and in case of reverse polarity, it can be used for welding of light alloy and the like, and generally it can be used for welding thin plates of about 3 mm or less.

In addition, the MIG welding method is called 'metal inert gas welding' and is one of inert gas arc welding such as TIG welding, and is also referred to as inert gas metal arc welding. A method of welding an electrode wire of 1.0 mm to 2.4 mm in diameter with no covering material to a torch at a constant speed to generate an arc between the wire and the base material to melt the wire in a spray state And a positive polarity having a fast melting speed of the wire is generally used. Such a MIG welding method is more efficient than the TIG welding method because of its large current density, and enables welding of thicker plates. In addition, since there is no slag to be removed, the working cycle is faster than that of coated arc welding. MIG welding was originally developed primarily for welding core wires to thick conductive plates, but is now being applied in a variety of applications including aluminum, copper, magnesium, nickel alloys, titanium, and steel alloys. When used in welding of aluminum or the like and welding in the opposite polarity (or alternating current), the periphery of the welded portion can be cleaned by the cleaning action to give a beautiful luster.

On the other hand, stopping the operation of piping or plant facilities due to abnormal situation or maintenance, etc., the flammable or toxic gas contained in the inside is transferred to another facility and released, so that the residual content remaining does not cause oxidation or reaction runaway It is necessary to perform neutralization treatment with a stable gas. In this way, the neutralizing treatment of the contents in the equipment or vessel with a gas which does not cause a chemical or physical reaction is called inactivation or purging, and the gas used at this time is called purge gas. The purge gas is usually inert and chemically stable.

In addition, the MIG welding torch M can be divided into a welding cable portion and a handle portion. The construction of the double welding torch cable includes a conductor portion for supplying current required for welding and a protection portion A gas hose for supplying gas, a control cable for controlling the start and stop of welding, and an outer member for protecting the three parts integrally. Inside the welding torch, a welding wire is supplied to the welding member The stock may include a spring liner.

The TIG welding torch T is a torch used for tungsten inert gas arc welding. The tungsten electrode rod is fixed in a state protruding a few millimeters from the tip of the nozzle. The welding current is normally supplied to the electrode through a water- . The nozzle serves to induce the flow of the inert gas and can be made of a refractory or water-cooled metal barrel.

4 and 5 are cross-sectional views schematically showing a common torch connection portion 40 of a wire feeding apparatus 100 according to some embodiments of the present invention.

4 and 5, for example, the common torch connection portion 40 may have a receiving space so as to correspond to the TIG welding torch head portion 42 or the MIG welding torso main head portion 43 And the recessed grooves 42a (42a) formed in the torch head portion 42 for TIG welding inserted or received in the groove receiving portion 40a or the torch head portion 43 for MIG welding And a latching screw 41 installed in the groove receiving portion 40a so that the latching screw 41 can be engaged without being detached from the groove receiving portion 40a.

4, the latching screw 41 may be formed by selecting at least one of a wrench bolt, a hexagon bolt, a butterfly bolt, an eye bolt, and a cross bolt, and the engagement screw 41 A spring washer may be included.

After the TIG welding head 42 or the MIG welding torch head 43 is inserted into the groove receiving portion 40a of the common torch connecting portion 40, 41 can be fastened.

Accordingly, the wire feeder 100 according to some embodiments of the present invention may be configured to apply the TIG welding torch head 42 or the MIG welding torso head 43 to the common torch connection 40 The TIG welding torch (T) and the MIG welding torch (M) are pulled to pull the welding torch head 42 or the TIG welding torch The TIG welding head 42 or the MIG welding torch male head 43 is detached from the common torch connecting portion 40 when an external force is applied to pull the MIG welding torch male head 43 Can be prevented.

6 and 7 are cross-sectional views schematically showing a direction fixing portion 41b of the common torch connection portion 40 of the wire feeder 100 according to some embodiments of the present invention.

6 and 7, the TIG welding head portion 42 and the MIG welding torch head portion 43 are provided so as to be fastened in a certain direction so as to prevent twisting rotation, A portion 42b may be formed.

At this time, the direction fixing portion 41b may be formed by selecting at least one of a D-CUT portion, a key groove, and a spline groove.

Therefore, due to the direction fixing portion 41b, it is possible to prevent the torsional rotation between the TIG welding head portion 42 and the MIG welding torch head portion 43 and the common torch connecting portion 40 .

1, the operation of the wire feeder 100 according to some embodiments of the present invention will be described. First, the user places the MIG welding torch M in the main body 10, And MIG welding can be performed.

Subsequently, when switching to TIG welding, the user disconnects the MIG welding torch head 43 from the common torch connection 40 and connects the TIG welding torch head 42 to the common torch connection 40 ).

At this time, the user can prevent the TIG welding torch head portion 42 from twisting and rotating by using the direction fixing portion 42b of the common torch connection portion 40.

In addition, the user can prevent the TIG welding torch head portion 42 from being detached from the common torch connection portion 40 by using the fixing screw 41.

The user may then disconnect the control line of the MIG welding torch M from the common control connection 70 and insert the control line of the TIG welding torch T into the common control connection.

Subsequently, the user can switch to TIG welding by using the switch 51 of the control unit 50.

Alternatively, the control connection portion of the TIG welding torch T may be connected to the common control connection portion 70 of the main body 10 to automatically switch to the TIG welding mode.

Therefore, the wire feeding apparatus 100 according to some embodiments of the present invention can commonly use the TIG welding torch or the MIG welding torch M, And it is possible to reduce the inconvenience of moving to the welding power supply device P when the welding method is switched. Therefore, the space can be efficiently used and the efficiency of the work can be increased.

It is also possible to prevent the TIG welding head 42 or the MIG welding torch head part 43 from being separated from the common torch connection part 40, So that the welding wire passing through the inside of the TIG welding head 42 and the MIG welding torch head 43 and the inside of the common torch connecting portion 40 is twisted, It is possible to prevent damage or breakage of the battery.

While the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the invention. Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims.

10: Body
20: Wire reel shaft
30: Wire transmission
40: common torch connection
41: Securing screw
42: Torch head for TIG welding
43: torch head for MIG welding
50:
60: common gas connection
70: Common control connection
100: wire feeder

Claims (7)

A main body for receiving power and gas from a welding power supply;
A wire reel shaft provided at one side of the main body;
A wire feeding part provided on the other side of the body so as to correspond to the wire reel shaft; And
A common torch connection part provided on the other side of the main body so as to selectively fasten the TIG welding torch and the MIG welding torch;
And the wire feeder. The method according to claim 1,
The common torch connection portion includes:
A groove receiving portion having a receiving space corresponding to the TIG welding torch head and the MIG welding torch head; And
A catching screw provided on the groove receiving portion so as to be engaged with the neck portion of the TIG welding torch inserted into the groove receiving portion and the neck portion formed on the torch head portion of the MIG welding;
And the wire feeder. 3. The method of claim 2,
Wherein the TIG welding torch head part and the MIG welding torch head part are formed with direction fixing parts so that they can be fastened in a certain direction to prevent twisting rotation. 5. The method of claim 4,
Wherein the direction fixing portion is formed by selecting at least one of a D-CUT, a key groove, and a spline groove. The method according to claim 1,
The MIG welding torch can be selectively coupled to the TIG welding torch or the MIG welding torch and can be selectively supplied to the TIG welding torch or the MIG welding torch. A connecting portion; And
The TIG welding torch or the MIG welding torch is installed on the other side of the main body and can be selectively coupled to the TIG welding torch or the MIG welding torch and is capable of selectively applying a control signal to the TIG welding torch or the MIG welding torch A common control connection;
Further comprising a wire feeder. The method according to claim 1,
And a control unit installed in the main body and provided with a switch capable of selecting at least one of a TIG welding mode, a gouging welding mode, and a MIG welding mode. The method according to claim 1,
And a control unit installed in the main body and automatically selecting one of the modes when the control connection portion of the TIG welding torch or the MIG welding torch is connected to the common control connection portion of the main body.

Images