KR200172028Y1 - Elements arranging structure of tig welder - Google Patents

Abstract

The present invention relates to a part arrangement structure of the TIG welding machine, the main transformer (111c) for outputting a large current of a low voltage on the lower plate (111) inside the case (110) close to the suction hole (112a) of the front plate 112 and Sequentially stacking the reactors 111d for smoothing the electrical components into direct current components; On the lower plate 111 between the cooling fan 113b and the main transformer 111c, the radiator 120 in which the some vortex hole 120a was formed is spaced apart using the some support piece 121; The shielding plate 150 extending from the inside of the front plate 112 to block the noise or high temperature heat generated from the main transformer (111c) and the reactor (111d) is bent in close contact with the side of the heat sink (120) Placed in shape; On the heat sink 120 from the cooling fan 113b to the shield plate 150, an input diode 134 for converting an AC input power into a DC input power and an output power of a DC low voltage high current pulse of 50 AC It is a basic feature of the technical configuration that the IGBT 135 which converts into a wave is sequentially arranged. That is, by separating or spaced apart the parts flowing high current and the parts flowing small current to prevent malfunction due to mutual interference, the high temperature heat generated during welding work is cooled by the vortex of the heat sink 120 as a whole. It is designed to realize the optimal welding work through the optimal arrangement of parts.

Description

ELEMENTS ARRANGING STRUCTURE OF TIG WELDER}

The present invention relates to a part arrangement structure of the TIG welding machine, and more specifically, to separate or spaced apart the part with a large current flows and the part with a small current flows to prevent malfunction due to mutual interference and high temperature generated during welding It relates to a part arrangement structure of a TIG welder which allows the heat of to be cooled by the cooling air scattered by the vortex holes of the heat sink.

In general, welding refers to metallurgical bonding through heating or pressurization such that atomic bonding between two kinds of solid materials of the same or different types is used. Examples include arc welding, resistance welding, and laser welding. There is this.

At this time, arc welding is a welding method using arc heat generated by arc discharge, and after melting the surface of the base material and the welding part by using the heat obtained by generating an arc between the base material to be welded and the welding torch, The metal of the welding torch is melted again and welded together, and a carbon electrode or a tungsten electrode may be used instead of the welding torch.

In addition, resistance welding refers to a method of heating a joint in a molten state by using heat generated by contact resistance generated when a very large current is sent to the weld, and then welding by welding under physical pressure. It is sometimes divided into resistance welding and butt resistance welding.

In addition, laser welding is a method of welding using a strong energy beam generated by induced radiation between energy levels of atoms or molecules. Laser beam is a concentrated heat source of high energy density. Because of its strong thermal effect on the material and low thermal deformation, it is used for precise welding and cutting, and it is easy to operate because it can work in the atmosphere and can easily guide the beam away from the laser generator. .

On the other hand, the arc welding is roughly divided into an inert gas arc welding and carbon dioxide (CO ₂ ) arc welding, etc. Among these, the inert gas arc welding is a TIG (TIG) welding using a tungsten electrode again (inert-) It is divided into gas tungsten arc welding and inert-gas metal arc welding, which uses filler metal as an electrode.

In this case, the TIG welding using the tungsten electrode does not use the flux (slag) is not generated slag (slag), and thus can be very advantageously applied to metals such as Al and Mg alloy.

In addition, since the TIG welding has no transition of molten metal from the tungsten electrode, there is no instability of the arc and no generation of spatters, and the workability is good and the reliability of welding quality is very high.

On the other hand, in the above-described TIG welding, first, there is a tungsten electrode in the injected argon (Ar) gas, and the arc current is generated by flowing a negative current to flow the large current to the side of the base material having the positive potential. The method of doing so applies. At this time, the metal melted by the arc heat is contained in the argon gas to make a more stable arc heat.

Therefore, the present applicant intends to propose a more precise and malfunction-free TIG welding machine based on the welding technique as described above.

The present invention has been made through the above proposal, the purpose is to completely separate or spaced apart parts flowing a large current and parts flowing a small current so as not to cause a malfunction due to interference between the parts and during welding The present invention provides a part arrangement structure of a TIG welder which allows the generated high temperature heat to be cooled by the cooling air scattered by the vortex holes of the heat sink.

1 is a circuit diagram showing a welding machine according to the present invention.

Figure 2 is a perspective view of the housing separated showing the parts arrangement of the welding machine according to the present invention.

Figure 3 is a side view of the housing separated showing the component arrangement of the TIG welder according to the present invention.

Explanation of symbols on the main parts of the drawings

100: TIG welding machine 110: case

111: bottom plate 111a: high speed rectifier diode

111b: high pressure generator 111c: main transformer

111d: reactor 112: front panel

112a: suction hole 112b: front channel switch unit

113:: rear panel 113a: exhaust hole

113b: cooling fan 120: heat sink

120a: vortex hole 121: support piece

130: main circuit board 131: input filter

132: input transformer 133: smoothing capacitor

134: input diode 135: IGBT

136: main controller 140: PWM circuit board

141: PWM control unit 150: shield plate

160: detection sensor

The present invention for achieving the above object,

A plurality of suction holes are bent in the vertical direction in the lower portion and the front channel switch portion for selecting and selecting various welding parameters in the upper portion is respectively disposed to be fixed vertically to one end of the flat lower plate, and the other end of the lower plate A case consisting of a rear plate vertically fixed to and having an outlet hole;

In the component arrangement structure of the TIG welder is installed on the back plate and comprises a cooling fan for sucking the external cold air via the suction hole and then discharges through the discharge hole;

Sequentially arranging a reactor for smoothing the main transformer for outputting a large current of low voltage and an electrical component with a direct current component on a lower plate in the case adjacent to the suction hole of the front plate;

A radiator having a plurality of vortex holes formed on the lower plate between the cooling fan and the main transformer to be spaced apart using a plurality of support pieces;

A shielding plate for blocking noise or high temperature heat generated from the main transformer and the reactor is arranged in a bent shape extending from an inner side of the front plate and partially in contact with a side surface of the heat sink;

An input diode for converting an AC input power into a direct current input power and an IGBT for converting an output power of a low voltage large current of direct current into a pulse wave of AC 50 s on the heat sink from the cooling fan to the shield plate;

On the input diode and the IGBT, a main circuit board which implements a main controller for controlling the output of the optimum desired welding voltage and the desired welding current by calculating and processing the welding parameter selected by the operation of the front channel switch unit is closely fixed to the rear plate. Parallelly spaced apart from the heat sink;

On the shield plate, a PWM circuit board implementing a PWM (Pulse Width Modulation) control unit for controlling the IGBT to output a uniform output current is fixed to an inner surface of the front plate so as to be spaced parallel to the main circuit board. Placement is a basic feature of the technical configuration.

Hereinafter, a preferred embodiment of the component arrangement structure of the TIG welding machine according to the present invention will be described in detail.

The TIG welding machine according to the present invention is supplied with a protective gas such as CO ₂ (carbon dioxide) and Ar (argon), Ar + CO ₂ , Ar + O ₂ (oxygen) from a gas cylinder, and supplies electrode wires to aluminum, stainless steel, and iron. It is used to precision weld the base metal.

In other words, after the welding gun approaches the welding part of the base material, press the torch switch so that the protective gas charged in the gas cylinder can be ejected through the gas nozzle of the welding gun, and at the same time, the electrode is connected by the low voltage high current through the TIG welding machine of the present invention. As the wire is adjacent to the base material, the electrode wire is melted by the arc to realize precision welding.

1 is a circuit diagram showing a TIG welder according to the present invention.

As shown in FIG. 1, the TIG welder 100 according to the present invention includes an input filter 131 for removing a noise signal that is likely to be mixed in an input power of 60 kW AC input from the outside, and the input filter 131. An input diode 134 for converting the input power of AC filtered through 131 to an input power of DC, and the input power of DC converted through the input diode 134 from a low current to a high current in a wide band; The smoothing capacitor 133 smoothed by the low voltage high current output power of the direct current so that a stable arc can be output, and the error of the voltage generated from the smoothing capacitor 133 are compared with saw tooth wave. A pulse width modulation (PWM) control unit 141 for generating a pulse wave and then matching the preset reference voltage to output a uniform output current, and the PWM control unit 141 Insulated Gate Bipolar Transistor (IGBT) 135 for converting the low-voltage, high-current output power of the direct current converted through the smoothing capacitor 133 into an AC 50 kHz pulse wave under control, and an AC 50 kHz pulse wave of the IGBT 135 The main transformer 111c converts the coil into a low voltage large current required for welding by varying the winding ratio and the thickness of the coil, and converts the low voltage large current of AC 50 mA output through the main transformer 111c into a pulsed electric component. A high speed rectifier diode 111a and a reactor 111d for smoothing a pulsated electrical component through a high voltage start current of the high voltage generator 111b to a direct current component to be welded with the high speed rectifier diode 111a. A front channel switch 112b for selecting and selecting various welding parameters such as the type of welding material, the type of gas used, the welding position, and the type of electrode wire; The main controller unit 136 and the input filter 131 supplied from the input filter 131 for calculating and processing the welding parameter selected by the operation of the front channel switch unit 112b to output the optimum desired welding voltage and the desired welding current. An input transformer 132 for converting input power into used power and supplying the main controller unit 136 and the PWM control unit 141 and a cooling fan connected to the input transformer 132 to discharge internal heat to the outside; It consists of 113b.

The operation and action of the TIG welder 100 according to the present invention having the above configuration, and the arrangement of the parts will be described in more detail with reference to FIGS. 2 and 3 as follows.

2 is a perspective view of the housing showing the component arrangement of the TIG welding machine according to the present invention, Figure 3 is a side view of the housing showing the component arrangement of the TIG welding machine according to the present invention, reference numeral 160 denotes an output current It is a detection sensor that detects.

The part arrangement structure of the TIG welding machine 100 according to the present invention is a case 110 consisting of a front plate 112 and a rear plate 113 vertically arranged before and after the lower plate 111 of a flat plate, and the case ( A housing (not shown) for protecting a plurality of components mounted inside the 110 is prepared.

On the upper side of the front plate 112, a front channel switch part 112b for selecting and selecting various welding parameters such as a kind of welding material to be welded, a kind of gas used, a welding posture, and a kind of electrode wire is disposed. In the lower part, a plurality of suction holes 112a are drilled long in the vertical direction.

The plurality of suction holes 112a allow external cool air to flow into the case 110 by the rotation of the cooling fan 113b, which will be described later, and the case 110 adjacent to the suction holes 112a. The main transformer 111c and the high-speed rectifier diode 111a converting the AC 50 kW pulse wave of the IGBT 135 into a large current of low voltage required for welding by varying the turns ratio or the thickness of the coil. Reactors 111d for smoothing the pulsated electrical components with direct current components are sequentially stacked.

The main transformer 111c performs a function of changing a low voltage and a high current electric component required for welding. The main transformer 111c has a heat generation degree so severe that the main transformer 111c may face the outside air so as to directly face the outside air. It is installed on the lower plate 111 and the reactor 111d also generates heat when a large current flows, so that the reactor 111d is sequentially stacked on the main transformer 111c close to the suction hole 112a without being mounted on the main circuit board 130.

A discharge hole 113a for discharging the internal hot air to the outside is bent in the rear plate 113 of the case 110, and a cooling fan 113b that rotates at a high speed is connected to the discharge hole 113a.

At this time, as the cooling fan 113b rotates, external cold air is sucked into the inside through the suction hole 112a drilled in the front plate 112 of the case 110 and then exits to the discharge hole 113a. It will be able to cool the heat of high temperature.

On the lower plate 111 between the cooling fan 113b and the main transformer 111c, a radiator 120 having a plurality of vortex holes 120a is spaced apart and fixed by a plurality of support pieces 121. On the lower plate 111 between the two support pieces 121 is mounted a high-speed rectifier diode 111a for rectifying a large current of a low voltage of AC 50 V output through the main transformer 111c and converting it into a pulsed electric component. The input diode 134 is disposed on the radiator 120 adjacent to the cooling fan 113b to convert the input power of the alternating current filtered through the input filter 131 into the direct current input power.

The vortex holes 120a are drilled in the longitudinal direction between the reactor 111d and the cooling fan 113b stacked on the main transformer 111c of the heat sink 120 and sucked in accordance with the rotation of the cooling fan 113b. Cool air introduced through the ball (112a) is rotated irregularly inside the case 110 to perform the function of scattering so that it can be evenly stimulated to the entire part.

In addition, the input diode 134 and the high-speed rectifying diode 111a have the highest heat generation among all the components, so that the heat dissipation is divided into the upper and lower portions of the heat sink 120 in consideration of the rising principle of the heat flow. To maximize the cooling efficiency.

On the lower plate 111 closest to the shortest distance from the cooling fan 113b, a high voltage generator 111b is formed to make a high voltage start current at the start of welding. Since the high-pressure generator 111b causes cone noise, the case 110 of the case 110 closest to the shortest distance from the cooling fan 113b may be located farthest from the main circuit board 130 to be described later and to maintain a long distance from other components. It is preferable to install in the corner part.

The main circuit board 130 is disposed in parallel on the input diode 134 fixed to the heat sink 120, and the main circuit board 130 is fixed on the reactor 111d to be parallel to the main circuit board 130. The PWM circuit board 140 to be arranged is prepared, and the lower surface of the PWM circuit board 140 may shield the main transformer 111c or the reactor 111d that generate a large amount of noise by a large current. Is placed. The shield plate 150 is formed into a bent shape extending from the inside of the front plate 112 to be in close contact with the upper side of the heat sink 120 to provide complete isolation of the reactor 111d and the PWM circuit board 140. Make it possible.

On the main circuit board 130 from the cooling fan 113b to the PWM circuit board 140, an input filter 131 which removes a noise signal that is likely to be mixed into an AC 60 kW input power input from the outside. And a pair of input transformers 132 for converting the input power supplied from the input filter 131 into the used power in a set, mounted in a row, filtered by the input filter 131, and then input diode ( A plurality of smoothing capacitors 133 smoothing out a set of three smoothing capacitors 133, which smoothly outputs a stable arc in a wide band from a low current to a high current, converts the DC input power converted from the low current to the high current. Two rows are arranged sequentially.

The pair of input filters 131 and the input transformer 132 sequentially arranged on the upper or lower surface of the main circuit board 130, and the input diode 134 disposed on the lower surface of the main circuit board 130 at the next position; The three sets of smoothing capacitors 133 disposed on the upper surface of the main circuit board 130 at the next position are designed and arranged in the order of filtering, transforming, rectifying and smoothing the input power supplied from the outside to prevent noise interference from each other. Not only can it be minimized, but also the shielding plate 150 can block the adverse effects of harmonic interference and high temperature generated from the main transformer 111c and the reactor 111d. It is emphasized that this preferred design is a layout that takes into account the number of trials and errors as well as the interference characteristics and heat generation between components as a result of continuous testing and measurement.

In other words, since a plurality of components including the main controller unit 136 implemented on the main circuit board 130 may be easily subjected to external interference, the shielding plate 150 may be provided from the main transformer 111c and the reactor 111d. It is arranged to be protected. That is, the IGBT 135 and the input diode 134 are spaced apart from the radiator 120 so as to be protected from high temperature heat and harmonic interference.

The IGBT 135 converts the output power of the DC low voltage large current converted through the smoothing condenser 133 into a pulse wave of AC 50 kV under the control of the PWM control unit 141, which is switched and output from the IGBT 135. The pulse wave is connected to one line of the primary side of the main transformer 111c, and the opposite line is mounted on the heat sink 120 directly below the smoothing capacitor 133 to shorten the connection line with the smoothing capacitor 133 as much as possible. To help. The switching of the IGBT 135 causes the main transformer 111c to become a positive current direction and then to a negative current direction to create an alternating current, thereby outputting a pulse wave of 50 Hz. . And, since it is mounted on the heat sink 120 directly below the smoothing condenser 133, the connection line with the smoothing condenser 133 can be minimized so that the leakage resistance is small and the influence of noise can be minimized.

If the distance between the IGBT 135 and the smoothing condenser 133 becomes a long distance, the shortest possible arrangement may be caused because malfunction or breakage of the IGBT 135 may occur due to an increase in inductance.

In addition, the IGBT 135 may be attached between the main circuit board 130 and the heat sink 120 to cool the heat generated during operation by cold air directly transmitted from the heat sink 120, and the IGBT 135. The connecting terminal of the main circuit board 130 is directly connected to serve as a fixed terminal of the main circuit board 130 and the electrical circuit is connected through the pattern line of the main circuit board 130, so that no complicated wiring process is required. Will be.

Therefore, in the arrangement structure of the TIG welding machine 100 according to the present invention, the parts in which the large current flows and the parts in which the small current flows are completely separated or spaced, so that malfunctions due to mutual interference are not generated, and high temperatures generated during operation It can be seen that it is designed to cool by stimulating the heat as a whole by the vortex of the heat sink 120.

According to the arrangement structure of the TIG welding machine 100 according to the present invention as described above, by separating or spaced apart the components flowing a large current and the components flowing a small current so as not to cause a malfunction due to mutual interference, occurs during operation By stimulating the overall high temperature heat by the vortex of the heat dissipating body 120 to cool, there is an excellent effect that can realize the optimum welding work through the optimal component arrangement.

Specifically, first, the main transformer 111c for outputting a large current of a low voltage and an electrical component on the lower plate 111 inside the case 110 adjacent to the suction hole 112a of the front plate 112 to smooth the DC component. By sequentially stacking the reactors 111d, external cooling air can be directly contacted through the suction hole 112a of the front plate 112 by the cooling fan 113b, so that the main transformer 111c and the reactor ( There is an effect that can immediately cool the high temperature heat that can be generated during the operation of 111d).

Second, by arranging the radiators 120 having a plurality of vortex holes 120a formed on the lower plate 111 between the cooling fan 113b and the main transformer 111c by using the plurality of support pieces 121, When the cooling fan 113b is rotated, the external cool air introduced through the suction hole 112a of the front plate 112 may be swirled together with the high temperature heat to escape to the discharge hole 113a to maximize the cooling efficiency. It works.

Third, the shielding plate 150 which blocks noise or high temperature heat generated from the main transformer 111c and the reactor 111d extends from the inside of the front plate 112 and partially adheres to the upper side of the heat sink 120. By arranging in a bent shape, a plurality of components mounted on the main circuit board 130 and the PWM circuit board 140 from the main transformer 111c and the reactor 111d, which generate the most noise signal and high temperature heat, are active. It is effective to protect.

Fourth, the input diode 134 for converting the AC input power into the DC input power and the output power of the DC low voltage high current on the heat sink 120 from the cooling fan 113b to the shield plate 150 The IGBT 135 for converting the pulse wave to the pulse wave is sequentially arranged, and the welding parameter selected by the operation of the front channel switch 112b on the input diode 134 and the IGBT 135 is calculated and processed to obtain the optimum desired welding voltage and desired value. The main circuit board 130, which implements the main controller unit 136, which controls the output to the welding current, is fixed in close contact with the rear plate 113 to be spaced apart from the heat sink 120 in parallel, and the cooling fan 113b. The input filter 131 and the input filter 131 for removing a noise signal that is likely to be mixed into an input power of 60 교류 AC input from the outside on the main circuit board 130 extending from the PWM circuit board 140 to the PWM circuit board 140. The input transformer 132 for converting the input power supplied from the power supply into the working power is arranged in a row, and the input power of the direct current converted through the input diode 134 after being filtered by the input filter 131 By sequentially arranging a plurality of smoothing capacitors 133 smoothing to a low voltage high current output power of direct current so as to output a stable arc in a wide band from low current to high current, that is, the main circuit board 130 1 set of input filters 131 and input transformer 132 sequentially arranged on the upper surface of the), the input diode 134 disposed on the lower surface of the next position, and three sets of smoothing capacitors arranged on the upper surface of the next position By designing and arranging the input power supplied from the outside by the filter 133 in the order of filtering or transforming, rectifying and smoothing, it is possible to minimize the interconnection lines between each other. Interference can be eliminated, and the shielding plate 150 can effectively block the adverse effects of harmonic interference and high temperature generated from the main transformer 111c or the reactor 111d.

Fifth, the main circuit board 130 includes a PWM circuit board 140 implementing a PWM (Pulse Width Modulation) control unit 141 for controlling the IGBT 135 to output a uniform output current on the shield plate 150. By fixedly arranged on the inner surface of the front plate 112 so as to be spaced in parallel to the, there is an effect capable of preventing harmonic interference and high temperature adverse effects generated from the main transformer (111c) or the reactor (111d).

Sixth, by arranging the high voltage generator 111b which makes the instantaneous high voltage start current at the start of welding on the lower plate 111 closest to the shortest distance from the cooling fan 113b, that is, farthest from the main circuit board 130 and the other It is installed at the corner of the case 110 closest to the shortest distance from the cooling fan 113b so as to maintain a long distance from the component, thereby preventing the malfunction of the product due to the cone noise of the high pressure generator 111b. There is.

Seventh, the high-speed rectifier diode 111a rectifies and converts a large current of a low voltage of AC 50 volts outputted through the main transformer 111c onto the lower plate 111 between the plurality of support pieces 121 and converts it into a pulsated electrical component. In other words, since the heat generation degree of the input diode 134 and the fast rectifying diode 111a is the largest among all the components, it is divided into the upper and lower portions of the heat sink 120 in consideration of the rising principle of the heat flow. By doing so, there is an effect that can maximize the cooling efficiency through heat dissipation.

Claims (4)

A plurality of suction holes 112a long and vertically bent in the lower portion and a front channel switch portion 112b for selecting and selecting various welding parameters on the upper portion are respectively disposed to vertically fix to one end of the plate-shaped lower plate 111. A case 110 composed of a front plate 112 and a rear plate 113 vertically fixed to the other end of the lower plate 111 and having a discharge hole 113a; The TIG welder 100 is installed on the rear plate 113 and includes a cooling fan 113b which sucks external cold air via the suction hole 112a and discharges it through the discharge hole 113a. In the component arrangement structure of; Reactor 111d for smoothing the main transformer 111c for outputting a large current of low voltage and an electrical component with a direct current component on the lower plate 111 inside the case 110 adjacent to the suction hole 112a of the front plate 112. ) Sequentially stacked; A radiator 120 having a plurality of vortex holes 120a formed on the lower plate 111 between the cooling fan 113b and the main transformer 111c and spaced apart from each other using a plurality of support pieces 121; A shielding plate 150 that blocks noise or high temperature heat generated from the main transformer 111c and the reactor 111d extends from the inside of the front plate 112 to partially adhere to the side surface of the heat sink 120. Arranged in a bent shape; On the heat sink 120 from the cooling fan 113b to the shield plate 150, an input diode 134 for converting an AC input power into a DC input power and an output power of DC low voltage high current Sequentially arranging IGBTs 135 for converting into pulse waves of? On the input diode 134 and the IGBT 135, the main controller unit 136 which controls the welding parameters selected by the operation of the front channel switch unit 112b to output the optimum desired welding voltage and the desired welding current. A main circuit board (130) which is implemented in close contact with the back plate (113) and is spaced apart from the heat sink (120) at the same time; The main circuit board 130 includes a PWM circuit board 140 implementing a PWM (Pulse Width Modulation) control unit 141 for controlling the IGBT 135 to output a uniform output current on the shield plate 150. Part arrangement structure of the TIG welder 100, characterized in that fixed to the inner surface of the front plate 112 so as to be spaced parallel to the). The method of claim 1, Part arrangement structure of the TIG welder (100) characterized in that the high pressure generator (111b) for creating a momentary high voltage start current at the start of welding is disposed on the bottom plate 111 closest to the shortest distance from the cooling fan (113b). The method of claim 1, On the lower plate 111 between the plurality of support pieces 121, a high-speed rectifier diode 111a for rectifying a large current of a low voltage of 50 VAC, which is output through the main transformer 111c, into a pulsated electrical component. Part arrangement structure of the TIG welder 100, characterized in that for arranging. The method according to claim 1 or 2, An input filter that removes a noise signal that is likely to be mixed into an AC 60 kW input power input from the outside on the main circuit board 130 extending from the cooling fan 113b to the PWM circuit board 140. 131 and an input transformer 132 for converting input power supplied from the input filter 131 into use power in a row; The input power of DC which has been filtered by the input filter 131 and then converted through the input diode 134 is output power of DC low voltage high current to output stable arc from low current to high current. Part arrangement structure of the TIG welding machine (100), characterized in that a plurality of smoothing condenser (133) to be smoothly arranged in sequence.