CN211759095U - Multifunctional welding machine - Google Patents
Multifunctional welding machine Download PDFInfo
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- CN211759095U CN211759095U CN201922069594.2U CN201922069594U CN211759095U CN 211759095 U CN211759095 U CN 211759095U CN 201922069594 U CN201922069594 U CN 201922069594U CN 211759095 U CN211759095 U CN 211759095U
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- 238000003466 welding Methods 0.000 title claims abstract description 92
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims abstract description 86
- 229910052786 argon Inorganic materials 0.000 claims abstract description 43
- 208000037516 chromosome inversion disease Diseases 0.000 claims abstract description 31
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 4
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 4
- 239000007789 gas Substances 0.000 claims description 16
- 238000004140 cleaning Methods 0.000 claims description 10
- 238000006243 chemical reaction Methods 0.000 claims description 9
- 238000010521 absorption reaction Methods 0.000 claims description 6
- 230000017525 heat dissipation Effects 0.000 claims description 4
- 230000005611 electricity Effects 0.000 claims description 3
- 238000002955 isolation Methods 0.000 claims description 3
- 238000013021 overheating Methods 0.000 claims description 3
- 238000003079 width control Methods 0.000 claims description 3
- 238000001914 filtration Methods 0.000 claims description 2
- 230000002452 interceptive effect Effects 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 21
- 239000003990 capacitor Substances 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 239000004568 cement Substances 0.000 description 1
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Abstract
The utility model discloses a multifunctional welding machine, which comprises a shell, a machine bottom, a front panel and a circuit part, wherein the machine bottom is L-shaped, and comprises a power line, a waterproof joint, a circuit breaker, a fan mesh enclosure, a solenoid valve and an aluminum shell resistor, wherein the power line, the waterproof joint, the circuit breaker, the fan mesh enclosure and the solenoid valve are arranged on an L-shaped vertical surface; the front panel comprises a digital display meter, a plurality of switches, a plurality of indicator lamps, a plurality of knobs, a plurality of potentiometers, a plurality of sockets and a gas-electric connector; the shell, the machine bottom and the front panel form a closed space, and the circuit part is positioned in the closed space and comprises a primary inversion rectifying board, a secondary inversion board, a secondary driving board, a high-frequency board, a control board and a gun switch board. The utility model discloses have four functions of direct current argon arc welding, square wave argon arc welding, cutting machine, manual welding, circuit control performance is good, the complete machine assembly is reliable.
Description
Technical Field
The utility model belongs to contravariant industry electric welding field, in particular to multifunctional welding machine.
Background
The multifunctional welding machine is rapidly developed in domestic and foreign markets by virtue of abundant functions and excellent cost performance; at present, common multifunctional welding machines in domestic and foreign markets comprise multifunctional welding machines such as a manual argon arc welding and cutting machine three-purpose machine, a square wave argon arc welding and direct current argon arc welding and manual welding three-purpose machine and the like, different products have completely different control circuits, complete machine assembly structure designs and the like, the performances and the reliability of the multifunctional welding machines are also greatly different, and no multifunctional welding machine with four functions of direct current argon arc welding, square wave argon arc welding, cutting machines and manual welding exists; therefore, how to design a four-function welding machine of direct current argon arc welding, alternating current argon arc welding, cutting machine, manual welding that control performance is good, product stability is high, energy-efficient has certain technical difficulty, and this is also the utility model discloses the difficult problem that needs the solution.
SUMMERY OF THE UTILITY MODEL
In view of the above, the present invention provides a multifunctional welding machine with four functions of dc argon arc welding, square wave argon arc welding, cutting machine and manual welding, which meets the electrical safety requirements, comprising a housing, a machine bottom, a front panel and a circuit part,
the shell comprises a top cover and a handle arranged on the top cover;
the machine bottom is L-shaped and comprises a power line, a waterproof joint, a circuit breaker, a fan mesh enclosure, an electromagnetic valve and an aluminum shell resistor, wherein the power line, the waterproof joint, the circuit breaker, the fan mesh enclosure and the electromagnetic valve are arranged on an L-shaped vertical surface; the power line is plugged with commercial power to supply power to the whole welding machine, and the power line penetrates into the machine bottom through the waterproof connector; the circuit breaker acts as an air switch; a fan network is arranged outside the fan, and wind power heat dissipation is carried out on the welding machine;
the front panel comprises a digital display meter, a plurality of switches, a plurality of indicator lamps, a plurality of knobs, a plurality of potentiometers, a plurality of sockets and a gas-electric connector; the shell, the machine bottom and the front panel form a closed space, and the circuit part is positioned in the closed space and comprises a primary inversion rectifying board, a secondary inversion board, a secondary driving board, a high-frequency board, a control board and a gun switch board; wherein,
the primary inversion rectifying board is connected with the secondary inversion board, the secondary driving board and the high-frequency board respectively and comprises a primary rectifying circuit, a soft start circuit, a filter circuit, a primary inversion circuit, an inversion absorption circuit, a primary side current feedback circuit, a main transformer isolation voltage reduction circuit, a secondary rectifying circuit and a secondary absorption circuit, the input 220V alternating current is converted into stable 310V direct current through rectification and filtering, the direct current 310V is converted into 43KHz square wave through the inversion circuit and is transmitted to a main transformer for voltage reduction treatment, and then stable low-voltage power supply output is obtained through the secondary rectifying circuit;
the secondary inverter board comprises a positive end secondary inverter circuit, a negative end secondary inverter circuit and a negative end booster circuit, and is used as a direct current channel, or the direct current is converted into a square wave power supply to provide a working power supply for square wave argon arc welding;
the secondary driving board amplifies a driving signal of the control board when the square wave argon arc welding function is performed, and a stable square wave driving power supply is provided for a switching tube IGBT of the secondary inversion board; under the direct current state, a stable direct current driving power supply is provided for a switching tube IGBT of the secondary inverter board;
the high-frequency plate is a high-frequency arc striking control circuit started during the functions of the argon arc welding and cutting machine, generates high-frequency high-voltage electricity and realizes the high-frequency arc striking function of the argon arc welding and cutting machine;
the control panel comprises an auxiliary power supply circuit, a primary inversion driving circuit, a quadratic wave driving circuit, a primary current checking and protecting circuit, a nixie tube display circuit, an overheating protection circuit, a 2T/4T conversion circuit, an AC/DC conversion circuit, a cutting machine/argon arc welding/manual welding conversion circuit, a front gas time control circuit, a cleaning pulse width control circuit, a peak current control circuit, an attenuation time control circuit, a gas delay time control circuit, a PWM control circuit and a gun switch control circuit, and the control panel is connected with the secondary driving panel, the high-frequency panel and the gun switch panel respectively.
The rifle switch board carries out anti-interference processing to rifle switch signal, prevents that interfering signal from getting into the control panel.
Preferably, the bottom of the L-shaped horizontal plane of the machine bottom is also provided with 4 rubber feet.
Preferably, a plurality of switches of the front panel are of a six-legged boat type and comprise a 2T/4T change-over switch, an AC/DC change-over switch and a cutter/argon arc welding/manual welding change-over switch.
Preferably, the sockets of the front panel include euro-express sockets and aviation sockets.
Preferably, the plurality of knobs of the front panel include a front air time adjusting knob, a cleaning pulse width adjusting knob, a peak current adjusting knob, a decay time adjusting knob, and a gas delay time adjusting knob.
The beneficial effects of the utility model reside in that: the direct-current argon arc welding machine has four functions of direct-current argon arc welding, square-wave argon arc welding, a cutting machine and manual welding, is concise in circuit design, convenient to assemble the whole machine, good in heat dissipation of power devices, and has a concise and clear operation interface, better circuit control performance and high-reliability mechanical performance.
Drawings
In order to make the purpose, technical scheme and beneficial effect of the utility model clearer, the utility model provides a following figure explains:
FIG. 1 is an exploded view of the multifunctional welding machine according to the embodiment of the present invention;
FIG. 2 is a schematic circuit diagram of a circuit portion of the multifunctional welding machine according to the embodiment of the present invention;
FIG. 3 is a schematic diagram of a primary inverter rectifier board circuit of the circuit part of the multifunctional welding machine according to the embodiment of the present invention;
FIG. 4 is a schematic circuit diagram of a secondary inverter board of the circuit part of the multifunctional welding machine according to the embodiment of the present invention;
FIG. 5 is a schematic diagram of a secondary driving board circuit of the circuit part of the multifunctional welding machine according to the embodiment of the present invention;
FIG. 6 is a schematic circuit diagram of a high-frequency board of the circuit part of the multifunctional welding machine according to the embodiment of the present invention;
FIG. 7 is a schematic diagram of a control board circuit of the circuit part of the multifunctional welding machine according to the embodiment of the present invention;
fig. 8 is a schematic circuit diagram of a gun switch board of a circuit portion of the multifunctional welding machine according to the embodiment of the present invention.
Detailed Description
The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
Referring to fig. 1, an exploded view of a welding machine is shown, and the welding machine is disclosed in detail in physical structure, and comprises a shell, a machine bottom 4, a front panel 36 and a circuit part, wherein the shell comprises a top cover 2 and a handle 1 arranged on the top cover 2;
the machine bottom 4 is L-shaped and comprises a power line 3, a waterproof joint 5, a circuit breaker 6, a fan 7, a fan mesh enclosure 8, an electromagnetic valve 9 and an aluminum shell resistor 10, wherein the power line, the waterproof joint 5, the circuit breaker 6, the fan 7, the fan mesh enclosure 8 and the electromagnetic valve 9 are arranged on an L-shaped vertical plane; the power line 3 is plugged with commercial power to supply power to the whole welding machine, and the power line 3 penetrates into the machine bottom 4 through the waterproof connector 5; the breaker 6 is used for air switch; a fan mesh enclosure 8 is arranged outside the fan 7, and wind power heat dissipation is carried out on the welding machine;
the front panel 36 comprises a digital display meter, a plurality of switches 38, a plurality of indicator lights 39, a plurality of knobs 40, a plurality of potentiometers 41, a plurality of sockets and a gas electric connector 44; the housing, the machine bottom 4 and the front panel 36 form a closed space,
the circuit part is arranged in the closed space, and fig. 2-8 disclose the circuit schematic diagram of the circuit part in detail, including a primary inversion rectifying board 110, a secondary inversion board 220, a secondary driving board 31, a high-frequency board 440, a control board 33, and a gun switch board 11; wherein,
the primary inversion rectifying board 110 is connected with the secondary inversion board 220, the secondary driving board 31 and the high-frequency board 440 respectively, and comprises a primary rectifying circuit, a soft start circuit, a filter circuit, a primary inversion circuit, an inversion absorption circuit, a primary side current feedback circuit, a main transformer isolation voltage reduction circuit, a secondary rectifying circuit and a secondary absorption circuit, wherein the input 220V alternating current is rectified and filtered to be changed into stable 310V direct current, the direct current 310V is changed into 43KHz square wave through the inversion circuit and is transmitted to a main transformer for voltage reduction treatment, and then stable low-voltage power supply output is obtained through the secondary rectifying circuit;
the secondary inverter board 220 comprises a positive end secondary inverter circuit, a negative end secondary inverter circuit and a negative end booster circuit, and is used as a direct current channel, or converts the direct current into a square wave power supply to provide a working power supply for square wave argon arc welding;
the secondary driving board 31 amplifies the driving signal of the control board 33 when the square wave argon arc welding function is performed, and provides a stable square wave driving power supply for the switching tube IGBT of the secondary inversion board 220; in a direct current state, a stable direct current driving power supply is provided for the switching tube IGBT of the secondary inverter board 220;
the high-frequency plate 440 is a high-frequency arc striking control circuit which is started during the functions of the argon arc welding and cutting machine, generates high-frequency high-voltage electricity and realizes the high-frequency arc striking function of the argon arc welding and cutting machine;
the control board 33 comprises an auxiliary power supply circuit, a primary inversion drive circuit, a quadratic wave drive circuit, a primary current check and protection circuit, a nixie tube display circuit, an overheating protection circuit, a 2T/4T conversion circuit, an AC/DC conversion circuit, a cutting machine/argon arc welding/manual welding conversion circuit, a front gas time control circuit, a cleaning pulse width control circuit, a peak current control circuit, an attenuation time control circuit, a gas delay time control circuit, a PWM control circuit and a gun switch control circuit, and is respectively connected with the secondary drive board 31, the high-frequency board 440 and the gun switch board 11.
The gun switch board 11 performs anti-interference processing on the gun switch signal, and prevents the interference signal from entering the control board 33.
In the specific embodiment, 4 rubber feet 48 are also arranged at the bottom of the L-shaped horizontal plane of the machine bottom 4.
The front panel sockets include a euro express socket 42 and an airline socket 43.
The front panel's several knobs 40 include a front air time adjustment knob, a cleaning pulse width adjustment knob, a peak current adjustment knob, a decay time adjustment knob, and a delay time adjustment knob.
Corresponding to the structure of the object in fig. 1, in a closed space formed by the shell, the bottom and the front panel, a middle plate 12, an upper plate 22, an arc striking plate 28 and a middle clapboard 30 are arranged to place electronic components and carry out assembly, and a gun switch board is arranged below the middle plate 12 and above the bottom of the machine; the middle plate 12 is provided with a reactor 13 (L1 in a circuit diagram), a CBB capacitor 14 (capacitors without a plus sign such as C46, C47 and C48 in the circuit diagram), a cement resistor 15 (R85, R86, R87 and R88 in the circuit diagram) and an arc striking coil 16, the upper plate is fixed above the bottom of the machine through a vertical beam 17, the vertical beam 17 also fixes an inverter radiator 18 and a rectifier radiator 21 thereon, and the rectifier radiator 21 is fixed with a switching tube IGBT (Q13-Q16 in a primary inverter rectifier plate in the circuit diagram); a fast recovery diode 20 (D3-D10 in a primary inversion rectifier board in a circuit diagram) is fixed on the inversion radiator 18; the upper plate 22 is arranged above the inverter radiator 18, the fast recovery diode 20 fixed on the inverter radiator 18 is electrically connected with the upper plate 22, electronic components of the upper plate 22 are arranged below the upper plate and are close to the rectifier radiator 21, and the rectifier bridge 23 (AC 1 and AC2 in the primary inverter rectifier plate in the circuit diagram), the relay 24 (K1 in the primary inverter rectifier plate in the circuit diagram), the electrolytic capacitor 25 (C50, C51 and C52 in the primary inverter rectifier plate in the circuit diagram), the CBB capacitor 14, the mutual inductor 26 (T4 in the primary inverter rectifier plate in the circuit diagram, and the like) and the main transformer 27 (T1 in the primary inverter rectifier plate in the circuit diagram) are included; the arc starting plate 28 is fixed between the upper plate 22 and the middle plate 12 through a first connecting copper strip 45, and a high-voltage pack 29 is arranged on the arc starting plate; the middle partition board 30 is arranged above the upper board 22, a secondary driving board 31 and a control board 33 are arranged on the middle partition board, a secondary driving transformer 32 (BYQ 6 in the secondary driving board in the circuit diagram) is arranged on the secondary driving board 31, a power transformer 34 (T2 in the control board in the circuit diagram) and a primary driving transformer 35 (T1 in the control board in the circuit diagram) are arranged on the control board 33, a second connecting copper strip 46 is further arranged for fixing, and an output copper strip 47 is used for fixing an air electric connector 44 and an aviation socket 43.
The utility model discloses realize concrete function as follows:
the first function is manual welding: when the cutter/argon arc welding/manual welding changeover switch is pressed to the manual welding position, the peak current knob is adjusted, the manual welding peak current value can be adjusted, and the peak current value can be displayed on the digital display table 37.
The second function is a cutter: the cutting machine/argon arc welding/manual welding change-over switch is pressed to the position of the cutting machine, a 2T mode is selected, the peak current value of the cutting machine can be adjusted by adjusting the peak current knob, the peak current value can be displayed on the digital display table 37, and the gas delay time can be controlled by adjusting the gas delay knob; and pressing a cutting machine/argon arc welding/manual welding change-over switch to the position of the cutting machine, selecting a 4T mode, pressing a gun switch machine of a gun switch plate 11 to start working, loosening the gun switch machine to continue working, pressing the gun switch machine again to continue working, and finally loosening the gun switch machine to stop working.
The third function is DC argon arc welding: the cutting machine/argon arc welding/manual welding change-over switch is pressed to the argon arc welding position, the DC state is selected, the 2T mode is selected, the peak current knob is adjusted, the argon arc welding peak current value can be adjusted, the peak current value can be displayed on the digital display table 37, the attenuation time can be adjusted to control the attenuation time of the machine current after gun loosening, and the air delay time can be controlled by adjusting the air delay knob; and selecting a 4T mode, adjusting the front air time, the current attenuation time and the air delay time, starting to work by pressing the gun switch machine of the gun switch plate 11, loosening the gun switch machine to continue working, pressing the gun switch machine again to continue working, and finally loosening the gun switch machine to stop working.
The fourth function is square wave argon arc welding: the cutting machine/argon arc welding/manual welding change-over switch is pressed to the argon arc welding position, the AC state is selected, the 2T mode is selected, the peak current knob is adjusted, the argon arc welding peak current value can be adjusted, the peak current value can be displayed on the digital display table 37, the cleaning depth can be adjusted by adjusting the cleaning pulse width knob, the attenuation time can be adjusted to control the attenuation time of the machine current after gun loosening, and the gas delay time can be controlled by adjusting the gas delay knob; the 4T mode is selected, the front gas time, the current decay time and the gas delay time can be adjusted, the cleaning depth can be adjusted by adjusting a cleaning pulse width knob, the gun switch machine of the gun switch plate 11 is pressed to start working, the gun switch machine is released to continue working, the gun switch machine is pressed again to continue working, and finally the gun switch machine is released to stop working.
Finally, it is noted that the above-mentioned preferred embodiments illustrate rather than limit the invention, and that, although the invention has been described in detail with reference to the above-mentioned preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the scope of the invention as defined by the appended claims.
Claims (5)
1. A multifunctional welder is characterized by comprising a shell, a machine bottom, a front panel and a circuit part, wherein,
the shell comprises a top cover and a handle arranged on the top cover;
the machine bottom is L-shaped and comprises a power line, a waterproof joint, a circuit breaker, a fan mesh enclosure, an electromagnetic valve and an aluminum shell resistor, wherein the power line, the waterproof joint, the circuit breaker, the fan mesh enclosure and the electromagnetic valve are arranged on an L-shaped vertical surface; the power line is plugged with commercial power to supply power to the whole welding machine, and the power line penetrates into the machine bottom through the waterproof connector; the circuit breaker acts as an air switch; a fan network is arranged outside the fan, and wind power heat dissipation is carried out on the welding machine;
the front panel comprises a digital display meter, a plurality of switches, a plurality of indicator lamps, a plurality of knobs, a plurality of potentiometers, a plurality of sockets and a gas-electric connector; the shell, the machine bottom and the front panel form a closed space, and the circuit part is positioned in the closed space and comprises a primary inversion rectifying board, a secondary inversion board, a secondary driving board, a high-frequency board, a control board and a gun switch board; wherein,
the primary inversion rectifying board is connected with the secondary inversion board, the secondary driving board and the high-frequency board respectively and comprises a primary rectifying circuit, a soft start circuit, a filter circuit, a primary inversion circuit, an inversion absorption circuit, a primary side current feedback circuit, a main transformer isolation voltage reduction circuit, a secondary rectifying circuit and a secondary absorption circuit, the input 220V alternating current is converted into stable 310V direct current through rectification and filtering, the direct current 310V is converted into 43KHz square wave through the inversion circuit and is transmitted to a main transformer for voltage reduction treatment, and then stable low-voltage power supply output is obtained through the secondary rectifying circuit;
the secondary inverter board comprises a positive end secondary inverter circuit, a negative end secondary inverter circuit and a negative end booster circuit, and is used as a direct current channel, or the direct current is converted into a square wave power supply to provide a working power supply for square wave argon arc welding;
the secondary driving board amplifies a driving signal of the control board when the square wave argon arc welding function is performed, and a stable square wave driving power supply is provided for a switching tube IGBT of the secondary inversion board; under the direct current state, a stable direct current driving power supply is provided for a switching tube IGBT of the secondary inverter board;
the high-frequency plate is a high-frequency arc striking control circuit started during the functions of the argon arc welding and cutting machine, generates high-frequency high-voltage electricity and realizes the high-frequency arc striking function of the argon arc welding and cutting machine;
the control panel comprises an auxiliary power supply circuit, a primary inversion driving circuit, a quadratic wave driving circuit, a primary current checking and protecting circuit, a nixie tube display circuit, an overheating protection circuit, a 2T/4T conversion circuit, an AC/DC conversion circuit, a cutting machine/argon arc welding/manual welding conversion circuit, a front gas time control circuit, a cleaning pulse width control circuit, a peak current control circuit, an attenuation time control circuit, a gas delay time control circuit, a PWM control circuit and a gun switch control circuit which are respectively connected with the secondary driving plate, the high-frequency plate and the gun switch plate;
the rifle switch board carries out anti-interference processing to rifle switch signal, prevents that interfering signal from getting into the control panel.
2. The multifunctional welder of claim 1, characterized in that the bottom of the L-shaped horizontal plane of the machine bottom is also provided with 4 rubber feet.
3. The multi-function welding machine as defined in claim 1, wherein said plurality of switches of said front panel are of a six-legged boat type, including a 2T/4T switch, an AC/DC switch and a cutter/argon arc welding/manual welding switch.
4. The multi-function welder according to claim 1, characterized in that the socket of the front panel comprises a euro-express socket and an aviation socket.
5. The multi-function welder according to claim 1, characterized in that the plurality of knobs of the front panel comprises a front gas time adjustment knob, a cleaning pulse width adjustment knob, a peak current adjustment knob, a decay time adjustment knob, and a gas delay time adjustment knob.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922069594.2U CN211759095U (en) | 2019-11-26 | 2019-11-26 | Multifunctional welding machine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922069594.2U CN211759095U (en) | 2019-11-26 | 2019-11-26 | Multifunctional welding machine |
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| Publication Number | Publication Date |
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| CN211759095U true CN211759095U (en) | 2020-10-27 |
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| CN201922069594.2U Active CN211759095U (en) | 2019-11-26 | 2019-11-26 | Multifunctional welding machine |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112548271A (en) * | 2020-12-14 | 2021-03-26 | 上海威特力焊接设备制造股份有限公司 | Automatic change multi-functional AC/DC welding machine of polarity |
| CN113510336A (en) * | 2020-12-24 | 2021-10-19 | 上海宗镕电器有限公司 | Double-pulse gas shielded welding machine |
| CN114700590A (en) * | 2022-03-30 | 2022-07-05 | 深圳固邦科技有限公司 | Gas welding point protection circuit before argon arc welding and argon arc welding machine |
-
2019
- 2019-11-26 CN CN201922069594.2U patent/CN211759095U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112548271A (en) * | 2020-12-14 | 2021-03-26 | 上海威特力焊接设备制造股份有限公司 | Automatic change multi-functional AC/DC welding machine of polarity |
| CN113510336A (en) * | 2020-12-24 | 2021-10-19 | 上海宗镕电器有限公司 | Double-pulse gas shielded welding machine |
| CN114700590A (en) * | 2022-03-30 | 2022-07-05 | 深圳固邦科技有限公司 | Gas welding point protection circuit before argon arc welding and argon arc welding machine |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Multifunctional welding machine Effective date of registration: 20210904 Granted publication date: 20201027 Pledgee: Zhejiang Tyrone commercial bank Limited by Share Ltd. Taizhou Wenling branch Pledgor: Zhejiang lawston Technology Co.,Ltd. Registration number: Y2021980008817 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |