CN112548271A - Automatic change multi-functional AC/DC welding machine of polarity - Google Patents
Automatic change multi-functional AC/DC welding machine of polarity Download PDFInfo
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- CN112548271A CN112548271A CN202011466739.3A CN202011466739A CN112548271A CN 112548271 A CN112548271 A CN 112548271A CN 202011466739 A CN202011466739 A CN 202011466739A CN 112548271 A CN112548271 A CN 112548271A
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- 238000003466 welding Methods 0.000 title claims abstract description 117
- 230000008859 change Effects 0.000 title claims description 4
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims abstract description 50
- 238000005520 cutting process Methods 0.000 claims abstract description 49
- 229910052786 argon Inorganic materials 0.000 claims abstract description 25
- 239000007789 gas Substances 0.000 claims abstract description 19
- 208000037516 chromosome inversion disease Diseases 0.000 claims description 12
- 230000003247 decreasing effect Effects 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 3
- 230000008569 process Effects 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 7
- 230000004224 protection Effects 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 2
- 238000004146 energy storage Methods 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 238000005493 welding type Methods 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/10—Other electric circuits therefor; Protective circuits; Remote controls
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/10—Other electric circuits therefor; Protective circuits; Remote controls
- B23K9/1006—Power supply
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/10—Other electric circuits therefor; Protective circuits; Remote controls
- B23K9/1006—Power supply
- B23K9/1043—Power supply characterised by the electric circuit
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
- G05B19/0423—Input/output
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- Arc Welding Control (AREA)
- Generation Of Surge Voltage And Current (AREA)
Abstract
The invention discloses a multifunctional alternating current-direct current welding machine with automatic polarity changing, which comprises a shell; a control panel, a plurality of power output interfaces and an input voltage interface are arranged outside the shell, and a plurality of power selection keys for selecting a plurality of welding modes are arranged on the control panel; a power circuit used for providing power for different welding modes is arranged in the shell and comprises a primary rectifying unit, a power factor correcting unit, a primary inverting unit, a transformer and a switching circuit unit; the switching circuit unit has the functions of AC/DC switching and switching between welding and cutting states, integrates DC manual welding, DC argon arc welding, DC gas shielded welding, AC argon arc welding and a cutting machine, can simultaneously connect three guns of a gas shielded welding gun and an argon arc welding gun with the cutting machine in the use process of the welding machine, and automatically realizes multifunctional switching through the power supply selection key. The primary side of the transformer of the invention shares a set of loop, thus saving cost and having compact structure.
Description
Technical Field
The invention belongs to the technical field of welding machines, and particularly relates to an automatic polarity-changing multifunctional alternating current and direct current welding machine.
Background
As an indispensable tool in industrial manufacturing, there are welding machines and cutting machines on the market, and the following types of welding machines are mainly used: (1) from the output type classification: can be divided into a direct current welding machine and an alternating current welding machine; (2) from the use aspect of the welder classification: it can be divided into manual welding, argon arc welding and gas shielded welding. Most of the existing welding machines are direct current welding machines (most adopt a welding mode, and a few welding machines are a combination of two or three types) or alternating current argon arc welding. Along with the development of industry, traditional welding machine can not satisfy the demand in market, and more demands of users are that a machine can realize that multiple welding function possesses the function of cutting simultaneously to can satisfy different demands through switching the function in different occasions, rather than going to change different welding machine types.
At present, most of multifunctional welding machines on the market cannot realize simultaneous connection of a plurality of welding guns; even if there is some multi-functional welder to realize a plurality of welder and connect, lack the function and the protect function that rifle switch intelligence switched multiple welding mode, if do not add protect function, in the in-service use process, if soldering turret or argon arc welder touch the nozzle of cutting torch and will lead to exploding the machine. For example, the patent with the application number of 201920002414.6 and the patent name of an inverter multifunctional welding machine output circuit can respectively perform AC/DC TIG alternating current and direct current argon arc welding, MMA electric welding and CUT plasma cutting, and can also realize the output of MIG welding and a variable polarity function by switching and combining two welding and cutting function units, but the multifunctional welding machine output circuit lacks the function of intelligently switching a plurality of welding modes and a protection function, and the risk of machine explosion is easy to occur in use.
Disclosure of Invention
The invention aims to provide an automatic polarity-changing multifunctional alternating current and direct current welding machine to solve the problems in the background art.
In order to achieve the above object, an embodiment of the present invention provides an automatic polarity-changing multifunctional ac/dc welding machine, which includes a housing; a control panel, a plurality of power output interfaces and an input voltage interface are arranged outside the shell, and a plurality of power selection keys for selecting a plurality of welding modes are arranged on the control panel; the power circuit comprises a primary rectifying unit, a power factor correction unit, a primary inversion unit, a transformer and a switching circuit unit.
The primary rectifying unit is used for rectifying the input voltage of the input voltage interface and outputting a pulsating direct current.
The power factor correction unit is used for realizing power factor correction.
The primary inversion unit is a full-bridge inversion unit, and the full-bridge inversion unit is used for inverting the voltage corrected by the power factor correction unit into square wave alternating current.
The transformer is used for increasing and decreasing the inverted square wave alternating current voltage and then outputting the voltage to the secondary side of the transformer; the secondary side of the transformer is provided with a secondary coil of the cutting machine and a secondary coil of the welding machine.
The switching circuit unit comprises a cutting machine rectifying circuit for a cutting machine, a welding machine rectifying circuit for a welding machine and an alternating current-direct current selection secondary inverter circuit; the cutting machine rectifying circuit is used for full-wave rectifying alternating-current voltage output by a secondary coil of a cutting machine on the secondary side of the transformer into direct current; the welder rectifying circuit is used for full-wave rectifying alternating-current voltage output by a welder secondary coil on the secondary side of the transformer into direct current; the alternating current-direct current selection secondary inverter circuit is used for realizing AC/DC switching of the voltage output by the rectifying circuit of the welding machine and outputting argon arc welding voltage and gas shielded welding voltage suitable for the welding machine.
In a further embodiment of the present invention, the plurality of power selection keys are connected to different input terminals of a single chip microcomputer, the single chip microcomputer outputs a control signal after receiving the input selection signal, and the control signal includes an AC/DC selection signal and a rectification circuit selection signal.
Preferably, the AC/DC selection signal controls the relay to operate through a triode in the AC/DC selection secondary inverter circuit, so as to control the on state of the DC bus and realize AC/DC switching.
Preferably, the rectifier circuit selection signal is used for selecting a rectifier circuit of the cutting machine or a rectifier circuit of the welding machine to switch the welding machine and the cutting machine.
In a further embodiment of the present invention, the power output interface includes a MIG gas shield welding gun interface, a TIG argon arc welding gun interface, a CUT cutting gun interface and a common port interface, and the plurality of power selection keys include an AC/DC selection key, an argon arc welding key, a gas shield welding key and a cutting machine key.
In further embodiments of the present invention, the input voltage interface may be connected with 1-110V or 1-220V AC.
In a further embodiment of the invention, the relay J1A for ac-dc conversion in the ac-dc selection secondary inverter circuit.
The technical scheme of the invention has the following beneficial effects:
(1) the invention adopts an advanced welding power supply circuit, which comprises a primary rectifying unit, a power factor correcting unit, a primary inverting circuit, a transformer and a switching circuit unit; the switching circuit unit has the functions of alternating current and direct current switching and welding gun and cutting state switching, integrates direct current manual welding, direct current argon arc welding, direct current gas shielded welding, alternating current argon arc welding and a cutting machine, can achieve the purpose that three guns of the gas shielded welding gun and the argon arc welding gun are connected with the cutting machine simultaneously in the using process of the welding machine, and automatically realizes multifunctional switching through the power supply selection key. The corresponding welding or cutting mode can be switched to only by pressing the power selection key of the corresponding gun, operation on a welding machine is not needed, the working efficiency of a welder can be greatly improved, and intelligent quick switching is really realized.
(2) The invention adopts the relay A2A to avoid various misoperation possibly caused by simultaneous connection of a plurality of guns, and can realize various loop connections or short circuits between the welding guns or between the welding guns by adopting various automatic protections without damaging the welding machine.
(3) The primary side of the voltage regulator of the invention shares a set of loop, thus saving cost and having compact structure.
Description of the figures
FIG. 1 is an external view of a multifunctional AC/DC welding machine according to an embodiment of the present invention;
FIG. 2 is a block circuit diagram of a power supply circuit in an embodiment of the invention;
FIG. 3 is a circuit diagram of a primary rectifying unit according to an embodiment of the present invention;
FIG. 4 is a circuit diagram of a power factor correction unit according to an embodiment of the present invention;
FIG. 5 is a circuit diagram of a primary inverter circuit according to an embodiment of the present invention;
FIG. 6 is a circuit diagram of a rectifier circuit for a cutting machine or a welder in an embodiment of the present invention;
fig. 7 is a circuit diagram of the secondary side of the transformer in the embodiment of the invention.
Detailed Description
In order to make the technical problems, technical solutions and advantages of the present invention more apparent, the following detailed description is given with reference to the accompanying drawings and specific embodiments.
An automatic polarity-changing multifunctional AC/DC welding machine, as shown in FIG. 1, comprises a housing; a control panel, a plurality of power output interfaces and an input voltage interface are arranged outside the shell, and a plurality of power selection keys for selecting a plurality of welding modes are arranged on the control panel; the power supply selection keys comprise an AC/DC selection key, an argon arc welding key, a gas shield welding key and a cutting machine key. The multiple power supply selection keys are matched for use to realize the selection of working modes of direct current manual welding (DC-MMA), direct current argon arc welding (DC-TIG), direct current gas shielded welding (MIG), alternating current manual welding (AC-MMA), alternating current argon arc welding (AC-TIG) and a cutting machine (CUT).
The power circuit for providing power for different welding modes is arranged in the shell, and as shown in fig. 2, the power circuit comprises a primary rectifying unit, a power factor correcting unit, a primary inverting unit, a transformer and a switching circuit unit. The output end of the switching circuit unit is respectively connected with a power output interface on the outer side of the shell, so that different guns (a gas protection welding gun, an argon arc welding gun or a cutting gun) can be selected.
The primary rectifying unit is used for rectifying the input voltage of the input voltage interface and outputting a pulsating direct current. In this embodiment, a circuit diagram of the primary rectifying unit is shown in fig. 3, and the primary rectifying unit circuit mainly functions to rectify 1-110V/220V input and output a pulsating direct current, where D1 and D4 are turned on in a positive half cycle of an alternating current, and D2 and D3 are turned on in a negative half cycle, so as to implement a rectifying function.
The power factor correction unit is used for realizing power factor correction. In the embodiment, the power factor correction unit is as shown in fig. 4, and the main function of the power factor correction unit is to implement power factor correction, and the rectified voltage, the voltage across the capacitor C5 and the current flowing through the loop are sampled, and PWM modulation is implemented through the PFC control circuit, so as to drive the IGBTs (V8, V8-1) to implement power factor correction. When the IGBT is switched on, the rectified voltage is stored through the energy storage inductor LT, and when the IGBT is switched off, the rectified voltage and the energy storage inductor LT are discharged to charge the main capacitor C5 through the diode D5 (an anti-reverse diode), so that the output voltage DC1 is higher than DC, and the boosting effect is realized. In fig. 3, C1, D6, and R5 are IGBT snubber circuits, R1 and R3 are driving resistors, and R6 and C2 are diode D5 snubber circuits.
The primary inversion unit is a full-bridge inversion unit, and the full-bridge inversion unit is used for inverting the voltage corrected by the power factor correction unit into square wave alternating current. In this embodiment, the full-bridge inverter unit inverts the PFC power factor corrected voltage into a square wave ac through a full-bridge inverter. As shown in fig. 5, when the inversion in the control loop drives the Q1 and Q4 turn-on signals, the output is a positive square wave, and when the inversion in the control loop drives the Q2 and Q3 turn-on signals, the output is a negative square wave, and then the square wave voltage is stepped down by the transformer and is output to the secondary side.
The transformer is used for increasing and decreasing the inverted square wave alternating current voltage and then outputting the voltage to the secondary side of the transformer; the secondary side of the transformer is provided with a secondary coil of the cutting machine and a secondary coil of the welding machine. Because no-load voltages of the cutting machine and the welding machine are different, two groups of coils are adopted on the secondary side of the transformer, one group of coils is the secondary coil of the cutting machine, and the other group of coils is the secondary coil of the welding machine.
The switching circuit unit comprises a cutting machine rectifying circuit for a cutting machine, a welding machine rectifying circuit for a welding machine and an alternating current-direct current selection secondary inverter circuit; the cutting machine rectifying circuit is used for full-wave rectifying alternating-current voltage output by a secondary coil of a cutting machine on the secondary side of the transformer into direct current; the welder rectifying circuit is used for full-wave rectifying alternating-current voltage output by a welder secondary coil on the secondary side of the transformer into direct current; specifically, the rectifier circuit of the cutting machine is a rectifier part of the cutting machine, the rectifier circuit of the cutting machine is changed into direct current by full-wave rectification of alternating current boosted by a transformer, when a positive square wave occurs, the rectifier circuits of the cutting machine are switched on by D7 and D10, when a negative square wave occurs, the rectifier circuits of the welding machine are switched on by D8 and D9, the rectifier circuit of the welding machine is changed into direct current by full-wave rectification of the alternating current by reducing the voltage of the transformer. The circuit of the rectifier circuit of the cutting machine is the same as that of the rectifier circuit of the welding machine, and the specific circuit is shown in figure 6.
The alternating current-direct current selection secondary inverter circuit is used for realizing AC/DC switching of the voltage output by the rectifying circuit of the welding machine and outputting argon arc welding voltage and gas shielded welding voltage suitable for the welding machine. As shown in FIG. 7, after the control panel determines the AC/DC selection, the signal is processed by the control panel in the housing, and an AC/DC control signal is output, and when the selection is direct current, the relay J1A is closed, and the output is direct current. When the selection is AC, the relay J1A is not operated, the AC drive of the control loop outputs control pulse to drive T1 and T2 in the graph through the drive resistor, when T1 is conducted, the output is positive, when T2 is conducted, the output is negative, and therefore the output is AC. In the figure, C1 and R1 are T1 absorption circuits, and C2 and R3 are T2 absorption circuits. As shown in fig. 7, the relay A1A is used to select whether it is the cutter mode (CUT) or the welder mode (MMA manual welding/TIG argon arc welding/MIG gas shielded welding); relay J1A is used to select whether the DC mode of operation or the AC mode of operation; relay A2A is used to protect against a blow-out that could occur if the gas shield welding torch or argon arc welding torch were to hit the nozzle of the cutting torch during actual use. When the relay A1A is closed, the rectifying circuit of the cutting machine rectifies and outputs, and the relay A2A is closed, the common end and the voltage end of the cutting machine output voltage for the cutting machine to use; when the relay A1A is disconnected, the rectifying circuit of the welding machine rectifies and the alternating current and direct current are selected by the alternating current and direct current selection secondary inverter circuit, so that the voltage required by the gas shield welding gun or the argon arc welding gun is output; when the relay A2A is turned off, explosion caused by the gas shielded welding gun or the argon arc welding gun touching the nozzle of the cutting gun can be prevented.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (7)
1. The multifunctional AC/DC welder with automatic polarity change includes one casing; a control panel, a plurality of power output interfaces and an input voltage interface are arranged outside the shell, and a plurality of power selection keys for selecting a plurality of welding modes are arranged on the control panel; the power circuit comprises a primary rectifying unit, a power factor correcting unit, a primary inverting unit, a transformer and a switching circuit unit;
the primary rectifying unit is used for rectifying the input voltage of the input voltage interface to output a pulsating direct current;
the power factor correction unit is used for realizing power factor correction;
the primary inversion unit is a full-bridge inversion unit, and the full-bridge inversion unit is used for inverting the voltage corrected by the power factor correction unit into square wave alternating current;
the transformer is used for increasing and decreasing the inverted square wave alternating current voltage and then outputting the voltage to the secondary side of the transformer; the secondary side of the transformer is provided with a secondary coil of the cutting machine and a secondary coil of the welding machine;
the switching circuit unit comprises a cutting machine rectifying circuit for a cutting machine, a welding machine rectifying circuit for a welding machine and an alternating current-direct current selection secondary inverter circuit; the cutting machine rectifying circuit is used for full-wave rectifying alternating-current voltage output by a secondary coil of a cutting machine on the secondary side of the transformer into direct current; the welder rectifying circuit is used for full-wave rectifying alternating-current voltage output by a welder secondary coil on the secondary side of the transformer into direct current; the alternating current-direct current selection secondary inverter circuit is used for realizing AC/DC switching of the voltage output by the rectifying circuit of the welding machine and outputting argon arc welding voltage and gas shielded welding voltage suitable for the welding machine.
2. The machine of claim 1, wherein the power selection buttons are connected to different inputs of a single-chip microcomputer, the single-chip microcomputer receives the input selection signal and outputs a control signal, and the control signal includes an AC/DC selection signal and a rectification loop selection signal.
3. The machine according to claim 2, wherein the AC/DC selection signal controls the relay via a transistor in the DC-AC selection secondary inverter circuit, thereby controlling the on-state of the DC bus and achieving AC/DC switching.
4. The machine of claim 2 wherein the commutation loop selection signal is used to select a machine commutation circuit or a machine commutation circuit to switch between the welder and the cutter.
5. The automatic polarity-changing multifunctional AC/DC welding machine as claimed in claim 1, wherein said power output interface includes MIG gas shield welding torch interface, TIG argon arc welding torch interface, CUT cutting torch interface and common terminal interface, and said plurality of power selection keys include AC/DC selection key, argon arc welding key, gas shield welding key and cutting machine key.
6. The machine according to claim 1, wherein the input voltage interface is capable of connecting 1-110V or 1-220V AC.
7. The machine according to claim 1, wherein the relay J1A is used for AC/DC conversion in the AC/DC selection secondary inverter circuit.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011466739.3A CN112548271A (en) | 2020-12-14 | 2020-12-14 | Automatic change multi-functional AC/DC welding machine of polarity |
| PCT/CN2021/110758 WO2022127139A1 (en) | 2020-12-14 | 2021-08-05 | Multifunctional ac/dc welding machine capable of automatically changing polarity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011466739.3A CN112548271A (en) | 2020-12-14 | 2020-12-14 | Automatic change multi-functional AC/DC welding machine of polarity |
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| CN112548271A true CN112548271A (en) | 2021-03-26 |
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| CN202011466739.3A Pending CN112548271A (en) | 2020-12-14 | 2020-12-14 | Automatic change multi-functional AC/DC welding machine of polarity |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022127139A1 (en) * | 2020-12-14 | 2022-06-23 | 上海威特力焊接设备制造股份有限公司 | Multifunctional ac/dc welding machine capable of automatically changing polarity |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022127139A1 (en) * | 2020-12-14 | 2022-06-23 | 上海威特力焊接设备制造股份有限公司 | Multifunctional ac/dc welding machine capable of automatically changing polarity |
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