KR200241161Y1 - Electric power suppling device for carbonicanid gas MAG/MIG welding machine - Google Patents

Abstract

The present invention relates to a power supply for 2Φ steel and aluminum combined CO ₂ MAG / MIG welding machine, in particular, the first rectifying unit for rectifying the AC voltage input to the three-phase to convert the DC voltage; A smoothing unit smoothing the DC voltage output from the first rectifying unit; An inverter for converting the DC voltage smoothed and output from the smoothing unit into an AC voltage of high frequency; A transformer for transforming the high frequency AC voltage output from the inverter into an AC low voltage suitable for welding; A second rectifying unit rectifying the AC voltage output through the transformer and converting the AC voltage into a DC voltage; In a power supply device for a MAG / MIG welder composed of an interphase reactor that smoothes a current to the DC power output from the second rectifier and transfers it to the base metal side, the coil of the interphase reactor is double stranded, and the number of windings thereof is predetermined. Increase the number of times, but the intermediate part is formed in the middle part so that the current corresponding to the molten welding of aluminum can be output to form the output terminal for steel welding for 2Φ and the output terminal for aluminum welding, using a single welding machine 2Φ By making it possible to weld both steel or aluminum, the product significantly improves the usability, compatibility, marketability and reliability of the product.

Description

Electric power suppling device for carbonicanid gas MAG / MIG welding machine}

The present invention relates to a power supply for 2Φ steel and aluminum combined CO ₂ MAG / MIG welding machine. More specifically, the output voltage of the transformer is rectified to a DC voltage and outputted to the base material side. By changing the winding ratio and the winding method of the reactor by installing an intermediate tap, the invention is made to weld CO ₂ MAG and MIG as well as steel of 2Φ.

In general, MIG welding is an abbreviation of Metal Inert Gas welding. It is a method of melting metal by welding with intermittent arc (flame discharge) while blocking air and welding part with gas, and originally referring to welding using argon gas. However, the welding using carbon dioxide (CO ₂ ) is also conventionally called as such (inert gas welding).

In addition, MAG welding is an abbreviation of metal active gas welding, and is used to specifically distinguish MIG welding using carbon dioxide (CO ₂ ) as a gas blocking the welding portion with air.

The above-mentioned CO ₂ and MIG welding machine is a precision welding that protects the welding area by shielding the welding rod 14 generated by arcing with a protective gas such as carbon dioxide (CO ₂ ) or argon (Ar). It is widely used when welding materials such as stainless steel, and the working method is to close the welding gun 9 to the welding site as shown in FIG. 3 and press the torch switch 10 of the welding gun 9 to press the gas cylinder. The protective gas filled in 11 is blown out through the gas nozzle 12 of the welding gun 9, and at the same time, the wire feeder 13 pushes the welding rod 14, which is a flux core wire, to the base material 7 When it is supplied to be adjacent to the and the arc is generated at the end of the electrode 14 and the electrode 14 adjacent to the base material 7 by the voltage output from the power supply device 8 of the welding machine, the electrode 7 is welded while the electrode 14 is melted .

By the way, the conventional power supply device for MIG (MIG) welding machine, as shown in Figure 1, the first rectifying unit (1) for rectifying and converting the AC voltage input to the three-phase to a DC voltage; A smoothing part 2 for smoothing the DC voltage output from the first rectifying part 1; An inverter (3) for converting a DC voltage smoothed and output from the smoothing unit (2) into an AC voltage of high frequency; A transformer (4) for converting the high frequency AC voltage output from the inverter (3) into an AC low voltage suitable for welding; A second rectifier 5 for rectifying the AC voltage output through the transformer 4 and converting the AC voltage into a DC voltage; It consists of a phase-reactor 6 which smoothes the current with respect to the DC power output from the said 2nd rectification part 5, and transmits it to the base material 7 side.

However, such a configuration has one fixed final voltage and current output from the power supply 8 for the MIG welder (i.e., one coil with no intermediate taps between the phase reactors 6). As a result, it is impossible to weld different base materials (for example, stainless steel and aluminum) by using a power supply for a MIG welder. have.

In addition, the existing equipment is capable of welding the outer diameter of the welding rod up to 1.6Φ when the CO ₂ MAG semi-automatic welding, and the welding rod is increased to 2.0Φ, so that the arc characteristics of the welding surface are not good (that is, the contact surface is large, so the instantaneous contact Due to the low resistance, the transformer and the interphase reactor could not handle the sudden low resistance, resulting in the short circuit of the electrode due to the increase of the current), which caused the welding failure, and therefore, the 2Φ flux wire cannot be used.

Meanwhile, since aluminum cannot be welded using a conventional CO ₂ MAG welder, when the aluminum is to be welded, the problem of performing welding using another equipment, a MIG welder (that is, different depending on the base material) Problem of having to prepare a welding machine).

The present invention was devised to solve such a conventional problem. The coil of the phase reactor was doubled to increase the number of windings (for example, 32 times), and to the middle part (for example, 16 times). 2Φ steel and aluminum combined CO ₂ MAG / MIG which can selectively weld 2Φ steel or aluminum using one CO ₂ MAG / MIG welding machine by forming an intermediate tap so that the current suitable for the molten welding of aluminum can be output Its purpose is to provide a power supply for a welder.

An object of the present invention described above, the first rectifying unit for rectifying the AC voltage input to the three-phase and converting the DC voltage; A smoothing unit smoothing the DC voltage output from the first rectifying unit; An inverter for converting the DC voltage smoothed and output from the smoothing unit into an AC voltage of high frequency; A transformer for transforming the high frequency AC voltage output from the inverter into an AC low voltage suitable for welding; A second rectifying unit rectifying the AC voltage output through the transformer and converting the AC voltage into a DC voltage; In a power supply device for a MAG / MIG welder composed of an interphase reactor that smoothes a current to the DC power output from the second rectifier and transfers it to the base metal side, the coil of the interphase reactor is double stranded, and the number of windings thereof is predetermined. It can be achieved by increasing the number of times, by forming an intermediate tab so that the current corresponding to the molten welding of aluminum can be output to the intermediate portion to form an output terminal for 2Φ steel welding and an output terminal for aluminum welding.

Therefore, the power supply for the CO ₂ MAG / MIG welder itself has an output terminal for steel welding for 2Φ and an output terminal for aluminum welding, so that both 2Φ steel or aluminum can be used with one welder. It can be welded, which greatly improves the usability and compatibility of the product, and the reliability of the product itself.

1 is a block diagram of a power supply for a conventional MIG welder.

2 is an overall configuration diagram of a 2Φ steel and aluminum combined CO ₂ MAG / MIG welder in which the device of the present invention is applied.

Figure 3 is a block diagram of the device of the present invention.

Explanation of symbols on the main parts of the drawings

1: first rectifying part 2: smoothing part

3: inverter 4: transformer

5: 2nd rectifier 6: phase-reactor

61: output terminal for steel welding for 2Φ 62: output terminal for aluminum welding

63: common terminal

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

Figure 3 shows a block diagram of the device of the present invention.

According to this, the first rectifier (1) for rectifying and converting the AC voltage input to the three-phase DC voltage; A smoothing part 2 for smoothing the DC voltage output from the first rectifying part 1; An inverter (3) for converting a DC voltage smoothed and output from the smoothing unit (2) into an AC voltage of high frequency; A transformer (4) for converting the high frequency AC voltage output from the inverter (3) into an AC low voltage suitable for welding; A second rectifier 5 for rectifying the AC voltage output through the transformer 4 and converting the AC voltage into a DC voltage; In the power supply device for MAG / MIG welding machine consisting of a phase reactor (6) for smoothing the current to the DC power output from the second rectifier 5 to the base material 7 side,

The coil of the phase reactor 6 is made of two strands, and the number of windings thereof is increased by a predetermined number of times, and an intermediate tap is formed at the middle portion so that a current suitable for the molten welding of aluminum is output, thereby outputting steel for 2Φ. The terminal 61 and the output terminal 62 for aluminum welding are formed, It is characterized by the above-mentioned.

Referring to the operation and effect of the device of the present invention configured as described above is as follows.

First, when the welding to the predetermined base material (7) using the power supply device consisting of the present invention device is implemented, the common terminal (63) is connected to the welding gun (9) to the base material of the welding target Therefore, the 2Φ steel welding output terminal 61 or the aluminum welding output terminal 62 formed in the interphase reactor 6 may be selectively connected to the base material 7.

That is, when the base material 7 to be welded is steel, the output terminal 61 for 2Φ steel welding may be selected and connected to the base material, and in the case of aluminum, the output terminal 62 for aluminum welding is selected to the base material. Just connect it.

In this way, according to the characteristics of the base material, the 2Φ steel welding output terminal 61 or aluminum welding output terminal 62 is selected and connected to the characteristics of the base material 7, and then the plug of the power supply is connected to the three-phase power source. When connected, the three-phase AC voltage input from the first rectifier 1 is first rectified and then smoothed by the capacitor of the smoothing part 2.

The rectified and smoothed tributary voltages are converted into high-frequency AC voltages by the inverter 3 and applied to the transformers 4. The transformers 4 transform the input AC voltages into low-voltage AC voltages suitable for welding. Transfer to the second rectifier (5).

Therefore, the second rectifier 5 again rectifies the AC voltage and outputs the positive voltage to the torch switch 10. The negative voltage of the phase-reactor 6 is welded to the steel for 2Φ. It is output to the base material 7 through the output terminal 61 for welding or the output terminal 62 for aluminum welding.

Therefore, when the user presses the torch switch 10 of the welding gun 9 after the welding gun 9 approaches the welding site, the protective gas filled in the gas cylinder 11 is filled with the gas nozzles of the welding gun 9. At the same time as it is ejected through 12) and the wire feeder 13 pushes the welding rod 14, which is a flux core wire, to be fed to be adjacent to the base material 7, by the voltage output from the power supply of the welding machine according to the present invention. An arc is generated at the end of the electrode 14 adjacent to the base material 7 to weld the base material 7 while the electrode 14 is melted.

On the other hand, when the CO ₂ semi-automatic welding using a 2Φ flux core wire, the arc cross section is large, and the stability of the arc is reduced. In this design, the coil of the phase reactor 6 is overlapped with two strands to improve the output arc characteristics. Increase the number of times (for example, 32 times), but in the middle part (for example, 16 winding positions), an intermediate tap is formed so that the current corresponding to the molten welding of aluminum can be output. By forming the 61 and the output terminal 62 for aluminum welding separately, stable arc characteristics can be obtained.

Therefore, when the material is steel, it can be wound using a 2Φ flux core wire by connecting the material to the steel welding output terminal 61 for 2Φ showing a higher output by winding more than the existing coil, and the melting point temperature is In the case of low aluminum, a material can be welded by connecting to the output terminal 62 for aluminum welding connected to the middle tab of the reactor 6, thereby obtaining stable arc characteristics regardless of the welding material.

As described above, according to the present invention, the coil of the phase reactor is wound into two strands, but the number of turns is increased by a predetermined number of times, and an intermediate tap is formed at the middle part so that a current suitable for the molten weld of aluminum is output. By forming the output terminal for 2Φ steel welding and the output terminal for aluminum welding, it is possible to weld both 2Φ steel and aluminum by using a single welding machine, which greatly improves the usability, compatibility, and reliability of the product. It is a very useful design.

Claims (1)

A first rectifier 1 for rectifying and converting an AC voltage input in three phases into a DC voltage; A smoothing part 2 for smoothing the DC voltage output from the first rectifying part 1; An inverter (3) for converting a DC voltage smoothed and output from the smoothing unit (2) into an AC voltage of high frequency; A transformer (4) for converting the high frequency AC voltage output from the inverter (3) into an AC low voltage suitable for welding; A second rectifier 5 for rectifying the AC voltage output through the transformer 4 and converting the AC voltage into a DC voltage; In the power supply device for MAG / MIG welding machine consisting of a phase reactor (6) for smoothing the current to the DC power output from the second rectifier 5 to the base material 7 side, The coil of the phase reactor 6 is overlapped with two strands, and the number of windings is increased by a predetermined number of times, and the coil is wound on the middle portion so that an intermediate tab is formed so that a current suitable for the molten welding of aluminum is output. A power supply for a 2Φ steel and aluminum combined CO ₂ MAG / MIG welder, comprising an output terminal 61 for welding and an output terminal 62 for welding aluminum.