Digital pulse gas shielded welding machine

Abstract

The utility model discloses a digital pulse gas shielded welding machine which comprises a shell and electronic equipment. The shell comprises a bottom plate, a top plate, a front panel, a rear panel, a left side plate, a right side plate and a middle layer plate; the electronic equipment comprises an air switch, a rectifier bridge, a capacitor board, a primary IGBT module, a main transformer, a rectifier board, an output inductor, an output fast socket positive, an output fast socket negative, a driving box, a PWM board, a fan, a power transformer, a main controller, a display board and an aviation socket. The electronic device is mounted in the housing. Through optimal design of the structure and the circuit, the device is reasonable and simple in structure, high in temporary load rate and high in reliability, digital control is adopted, good static external characteristics and rapid dynamic response are achieved, welding arcs are stable, formed weld joints are attractive, and the device has the capacity of welding multiple kinds of metal; the high-efficiency energy-saving environment-friendly welding equipment is industrial-grade high-performance, high-temporary-load-rate and high-reliability efficient energy-saving environment-friendly welding equipment.

Description

Technical Field

[0001] The present invention belongs to the technical field of pulsed gas shielded welding machines, and particularly relates to a digital pulsed gas shielded welding machine. Background Art

[0002] The pulsed gas shielded welding machine can output direct current for manual welding, output direct current for gas shielded welding, and output pulsed current for pulsed gas shielded welding. The machine itself can weld conventional iron, carbon steel, stainless steel, as well as aluminum and aluminum alloys.

[0003] Due to the conventional pulsed gas shielded welding machine, it has a large volume, complex structure and drive circuit. Once damaged, the repair is very complicated, and the duty cycle is low, and the reliability is not high.

[0004] Therefore, it is necessary to design a new digital pulsed gas shielded welding machine to provide a simple, reliable and portable structure and drive circuit on the premise of realizing the functions of the welding machine. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a digital pulsed gas shielded welding machine in view of the above-mentioned prior art deficiencies.

[0006] To achieve the above technical purpose, the technical solution adopted by the present invention is as follows:

[0007] A digital pulsed gas shielded welding machine, the welding machine includes a housing and electronic equipment; the housing includes a bottom plate, a top plate, a front panel, a rear panel, a left side plate, a right side plate and a middle layer plate; the electronic equipment includes an air switch, a rectifier bridge, a capacitor board, a primary IGBT module, a main transformer, a rectifier board, an output inductor, a positive output fast socket, a negative output fast socket, a drive box, a PWM board, a fan, a power transformer, a main control board, a display board and an aviation socket; the electronic equipment is installed in the housing.

[0008] Preferably, one end of the air switch is connected to external power supply, and the other end is connected to the input end of the rectifier bridge; the output end of the rectifier bridge is connected to the input of the capacitor board; the output of the capacitor board is connected to two primary IGBT modules at the same time; the output ends of the two primary IGBT modules are respectively connected to two main transformers; two rectifier boards are connected to each secondary coil of each main transformer, the output of one of the main transformers is connected to the output inductor, the other end of the output inductor is connected to the positive output fast socket, and the output end of the other main transformer is connected to the negative output fast socket;

[0009] The output end of the air switch is also connected to the fan and the power transformer at the same time, the output end of the power transformer is connected to the main control board, the main control board is connected with the display board and the PWM board, and the PWM board is connected to the drive box, so as to realize the control of the primary IGBT module;

[0010] The display board is also connected to a five-core aviation socket;

[0011] The main control board is also connected to a seven-core aviation socket.

[0012] Preferably, an output positive quick socket and an output negative quick socket are installed on the front panel, and the positive and negative quick sockets are on both sides of the front panel; a display board is also installed on the front panel. The digital display board can display current, voltage, and storage channels. There are two adjustment knobs on the display board for parameter adjustment functions. There are also twelve buttons and indicators for switching various parameters. The display board is connected to the main board by wires to transmit the input power / output signal. A wind window is provided below the front panel for the air outlet for ventilation.

[0013] Preferably, an air switch is installed on the rear panel for controlling the on and off of the power supply, and it is installed on the upper right side of the rear panel; a power cord input socket interface is provided at the upper left end of the rear panel for power input. The output end of the power cord input socket is connected to the air switch, and the air switch is connected to the three-phase rectifier bridge of the main circuit to provide alternating current to the main circuit; there is also a 36V heater socket on the upper part of the rear panel for providing power for the gas meter heating. A five-core aviation socket and a seven-core aviation socket are also provided on the left side of the rear panel for communicating with the display board of the wire feeder. A positive quick socket is installed on the leftmost side for connecting the positive pole of the wire feeder. An external wind window is provided below, and there is an axial flow fan inside the wind window for dissipating heat from the internal power devices.

[0014] Preferably, an IGBT radiator and a secondary rectifier board radiator are installed on each of the left and right sides of the bottom plate. One primary IGBT module is installed on the IGBT radiator. There is an IGBT absorption board in the IGBT module for absorbing peak voltage. Absorption capacitors are also connected in parallel to the positive and negative poles of the IGBT module for absorbing voltage spikes; there are two secondary rectifier boards on the secondary rectifier board radiator for rectifying and outputting the inverted voltage. The secondary rectification output end is connected to the right secondary rectifier radiator, and then connected to the output inductor. A feedback Hall sensor is installed on the aluminum strip of the output inductor for detecting the output current signal and providing current feedback to the main control board. The output inductor is connected to the positive quick socket on the front panel.

[0015] Preferably, a three-phase rectifier bridge and a filter capacitor board are installed at a position on the middle layer board near the upper part of the rear panel to rectify and filter the power grid. A drive box is installed above the middle position, and the inside is a drive circuit board. The outputs of the drive box are respectively connected to the drive pins of the left and right primary IGBT modules to drive the primary IGBT modules. A power transformer is installed at the upper front position on the middle layer board to provide alternating current to the main control board. In addition, a bracket is installed above the power transformer, and the main control board and the PWM board are installed on the bracket. The main control board is used for calculating various parameters and outputting a given signal to the PWM board. There is a connection line between the main control board and the front display board for data communication. The PWM board mainly outputs a drive signal to connect to the primary of the drive box, and its main function is to drive the primary IGBT modules. In addition, two main transformers are installed on the left and right below the middle layer board. The primaries of the two main transformers are connected in series, and the two ends of the primary are connected to the outputs of the left and right primary IGBT modules. The secondaries are connected to the left and right secondary rectifier boards and then rectified and output. The center taps of the two main transformers are connected in parallel to the negative pole of the fast socket on the front panel to improve heat dissipation and reliability.

[0016] Preferably, four casters are provided below the bottom plate for quickly moving the machine.

[0017] The utility model has the following beneficial effects:

[0018] After adopting a digital pulse gas shielded welding machine of the utility model, through the optimized design of the structure and circuit, its structure is reasonable and simple, the duty cycle is high, the reliability is high, digital control is adopted, it has good static external characteristics and fast dynamic response, making the welding arc stable and the weld formation beautiful, and it has the ability to weld a variety of metals. It is an industrial-grade high-performance, high-duty-cycle, high-reliability, efficient energy-saving and environment-friendly welding equipment. Description of the Drawings

[0019] Figure 1 It is a three-dimensional schematic diagram of the assembly of a digital pulse gas shielded welding machine of the utility model.

[0020] Figure 2 It is a front view of the assembly of a digital pulse gas shielded welding machine of the utility model.

[0021] Figure 3 It is a rear view of the assembly of a digital pulse gas shielded welding machine of the utility model.

[0022] Figure 4 It is a left view of the assembly of a digital pulse gas shielded welding machine of the utility model (the left and right side plates are omitted).

[0023] Figure 5 It is a right view of the assembly of a digital pulse gas shielded welding machine of the utility model (the left and right side plates are omitted).

[0024] Figure 6 This is a top view (excluding the top plate) of the assembly of a digital pulsed gas shielded arc welding machine of the present utility model.

[0025] Figure 7 This is a schematic diagram of the bottom plate of the assembly of a digital pulsed gas shielded arc welding machine of the present utility model.

[0026] Figure 8 This is the schematic diagram of the main circuit of a digital pulsed gas shielded arc welding machine of the present utility model.

[0027] In the figure: 1. Channel display; 2. Current display; 3. Voltage display; 4. One - key operation button; 5. Gas detection button; 6. Welding mode button; 7. Welding step setting button; 8. Wire selection button; 9. Welding material selection button; 10. Channel button; 11. Storage button; 12. Current adjustment knob; 13. Menu left - shift button; 14. Locking button; 15. Menu right - shift button; 16. Voltage adjustment knob; 17. Fast output positive socket; 18. Fast output negative socket; 19. Front windshield; 20. Positive output fast socket; 21. Waterproof connector base; 22. Seven - core aviation socket; 23. Air switch; 24. Heater base; 25. Five - core aviation socket; 26. Rear windshield; 27. Fan; 28. IGBT radiator; 29. Primary IGBT module; 30. IGBT absorption board; 31. Metal resistor; 32. Rectifier board; 34. Secondary rectifier radiator; 35. Output inductor; 36. Main transformer; 44. Rectifier bridge; 46. Main board support; 47. Main control board; 48. Power transformer; 49. PWM board; 50. Driver box; 51. Capacitor board; 52. Caster. Detailed implementation mode

[0028] The following further describes the embodiments of the present invention in detail with reference to the accompanying drawings.

[0029] See Figures 1-8 , a digital pulsed gas shielded arc welding machine, the welding machine includes a housing and electronic devices; the housing includes a bottom plate, a top plate, a front panel, a rear panel, a left side panel, a right side panel and a middle layer panel; the electronic devices include an air switch, a rectifier bridge, a capacitor board, a primary IGBT module, a main transformer, a rectifier board, an output inductor, a positive output fast socket 17, a negative output fast socket 18, a driver box 50, a PWM board 49, a fan 27, a power transformer 48, a main control board 47, a display board and an aviation socket; the electronic devices are installed in the housing.

[0030] During specific implementation, one end of the air switch 23 is connected to external power supply, and the other end is connected to the input end of the rectifier bridge 44; the output end of the rectifier bridge 44 is connected to the input of the capacitor plate 51; the output of the capacitor plate 51 is simultaneously connected to two primary IGBT modules 29; the output ends of the two primary IGBT modules 29 are respectively connected to two main transformers 36; two rectifier plates 32 are connected to the secondary coil of each main transformer 36, the output of one of the main transformers 36 is connected to the output inductor 35, the other end of the output inductor 35 is connected to the positive of the output quick socket 20, and the output end of the other main transformer 36 is connected to the negative of the output quick socket;

[0031] The output end of the air switch 23 is also simultaneously connected to the fan 27 and the power transformer 48. The output end of the power transformer 48 is connected to the main control board 47. A display board and a PWM board 49 are connected to the main control board 47. The PWM board 49 is connected to the drive box, thereby realizing the control of the primary IGBT module 29;

[0032] The display board is also connected to a five-core aviation socket 25;

[0033] The main control board is also connected to a seven-core aviation socket 22.

[0034] During specific implementation, an output positive quick socket 17 and an output negative quick socket 18 are installed on the front panel. The positive and negative quick sockets are on both sides of the front panel. A display board is also installed on the front panel. The digital display board can display current, voltage, and storage channels. There are two adjustment knobs on the display board for parameter adjustment functions. There are also twelve buttons and indicators for switching various parameters. The display window includes channel display 1, current display 2, and voltage display 3. The buttons include the unification button 4, the air detection button 5, the welding method button 6, the welding step setting button 7, the welding wire selection button 8; the welding material selection button 9, the channel button 10, the storage button 11, the current adjustment knob 12, the menu left shift button 13, the lock button 14, the menu right shift button 15, and the voltage adjustment knob 16. The display board and the main board are connected by wires to transmit the input power / output signal. A wind window 19 is provided below the front panel for the air outlet for ventilation.

[0035] During specific implementation, an air switch 23 is installed on the rear panel to control the power supply on and off, and it is installed on the upper right side of the rear panel; a power cord input socket interface is provided at the upper left end of the rear panel for power input. The output end of the power cord input socket is connected to the air switch 23, and the air switch is connected to the three-phase rectifier bridge 44 of the main circuit to provide alternating current to the main circuit; there is also a 36V heater socket 24 above the rear panel for providing power for the gas meter heating. A five-core aviation socket 25 and a seven-core aviation socket 22 are also provided on the left side of the rear panel for communicating with the wire feeder display board. A positive fast socket is installed at the leftmost side for connecting the positive pole of the wire feeder. An external air window 26 is provided below, and there is an axial flow fan 27 inside the air window to dissipate heat from the internal power devices.

[0036] During specific implementation, an IGBT radiator 28 and a secondary rectifier board radiator 34 are installed on the left and right sides of the bottom plate respectively. One primary IGBT module 29 is installed on the IGBT radiator 28. There is an IGBT absorption board inside the IGBT module to absorb the spike voltage, and absorption capacitors are also connected in parallel to the positive and negative poles of the IGBT module to absorb the voltage spike; there are two secondary rectifier boards 32 on the secondary rectifier board radiator 34 to rectify and output the inverted voltage. The secondary rectification output end is connected to the right secondary rectifier radiator 34, and then connected to the output inductor 35. A feedback Hall sensor is installed on the aluminum strip of the output inductor 35 to detect the output current signal and provide current feedback to the main control board 47. The output inductor 35 is connected to the positive fast socket on the front panel.

[0037] During specific implementation, a three-phase rectifier bridge 44 and a filter capacitor board 51 are installed on the middle layer board near the upper part of the rear panel to filter the rectified power grid. A drive box 50 is installed above the middle position. The inside is a drive circuit board. The outputs of the drive box are respectively connected to the drive pins of the left and right primary IGBT modules 29 to drive the primary IGBT module 29. A power transformer 48 is installed at the upper front position of the middle layer board to provide alternating current to the main control board 47. In addition, a bracket is installed above the power transformer 48, and the main control board 47 and the PWM board 49 are installed on the bracket. The main control board 47 is used for calculating various parameters and outputting a given signal to the PWM board 49. There is a connection line between the main control board 47 and the front display board for data communication. The PWM board 49 mainly outputs drive signals to connect to the primary of the drive box 50, and its main function is to drive the primary IGBT module 29. In addition, two main transformers 36 are installed on the left and right below the middle layer board. The primaries of the two main transformers 36 are connected in series, and the two ends of the primary are connected to the output ends of the left and right primary IGBT modules 29. The secondaries are connected to the left and right secondary rectifier boards 32, and then rectified and output. The center taps of the two main transformers 36 are connected in parallel to the negative pole of the fast socket on the front panel to improve the heat dissipation and reliability.

[0038] In specific implementation, four casters 52 are provided under the bottom plate for quickly moving the machine.

[0039] When the equipment is working, the main power supply of 380V is input from the waterproof connector base 21, and the other end is connected through the air switch 23. The output end of the air switch 23 is connected to two three-phase rectifier bridges 44. The rectifier bridges are in parallel. After rectification, it is filtered by filter capacitors into direct current, and then direct current is provided to the left and right primary IGBT modules 29. After being inverted by the IGBT to form alternating current, it is output to the primaries of two main transformers 36. The primaries of the two main transformers 36 are connected in series. The voltage after step-down of the secondary is rectified by the left and right secondary rectifier plates 32, and then filtered by the output inductor 35 and then output.

[0040] A digital pulse gas shielded welding machine of the present utility model, through the optimized design of the structure and circuit, has a reasonable and simple structure, a high duty cycle, and high reliability. It adopts digital control, has good static external characteristics and fast dynamic response, makes the welding arc stable and the weld formation beautiful, and has the ability to weld a variety of metals. It is an industrial-grade high-performance, high-duty cycle, high-reliability, energy-saving and environmentally friendly welding equipment.

[0041] Although the present invention has been described in detail above with general descriptions and specific embodiments, based on the present invention, some modifications or improvements can be made, which are obvious to those skilled in the art. Therefore, these modifications or improvements made without departing from the spirit of the present invention all fall within the scope of protection required by the present invention.

Claims

1. A digital pulse gas shielded welding machine, characterized in that: The welding machine includes a shell and electronic equipment; the shell includes a bottom plate, a top plate, a front panel, a rear panel, a left side panel, a right side panel and a middle plate; the electronic equipment includes an air switch, a rectifier bridge, a capacitor plate, a primary IGBT module, a main transformer, a rectifier plate, an output inductor, a positive output fast socket, a negative output fast socket, a drive box, a PWM board, a fan, a power transformer, a main control board, a display board and an aviation socket; the electronic equipment is installed in the shell; One end of the air switch is connected to the external power supply, and the other end is connected to the input end of the rectifier bridge; the output end of the rectifier bridge is connected to the input of the capacitor plate; the output of the capacitor plate is simultaneously connected to two primary IGBT modules; the output ends of the two primary IGBT modules are respectively connected to two main transformers; two rectifier plates are connected to the secondary coil of each main transformer, one of the main transformer outputs is connected to the output inductor, the other end of the output inductor is connected to the positive output fast socket, and the output end of the other main transformer is connected to the negative output fast socket; The output end of the air switch is also connected to the fan and the power transformer at the same time, the output end of the power transformer is connected to the main control board, the main control board is connected to the display board and the PWM board, the PWM board is connected to the drive box, thereby realizing the control of the primary IGBT module; The display panel is also connected to a five-core aviation socket; The main control board is also connected to a seven-core aviation socket.

2. A digital pulse gas shielded welding machine according to claim 1, characterized in that: The front panel is installed with an output positive pole quick socket and an output negative pole quick socket, and the positive and negative pole quick sockets are on both sides of the front panel; the front panel is also equipped with a display panel, and the digital display panel can display current, voltage, and storage channels. There are two adjustment knobs on the display panel for parameter adjustment function, and there are twelve buttons and indicator lights for switching various parameters. The display panel and the main board are connected with a wire to transmit input power / output signals. A wind window is provided under the front panel for ventilation outlet.

3. A digital pulse gas shielded welding machine according to claim 1, characterized in that: An air switch is installed on the rear panel to control the opening and closing of the power supply, and is installed on the upper right side of the rear panel; a power cord input socket interface is provided on the upper left end of the rear panel for power input, and the output end of the power cord input socket is connected to the air switch, and the air switch is connected to the three-phase rectifier bridge of the main circuit to provide AC power to the main circuit; there is also a 36V heater socket above the rear panel to provide power for gas meter heating, and a five-core aviation socket and a seven-core aviation socket are also provided on the left side of the rear panel for communicating with the wire feeder display panel. A positive pole quick socket is installed on the far left for connecting the positive pole of the wire feeder, and an external wind window is provided below, and an axial flow fan is provided inside the wind window to dissipate heat for internal power devices.

4. A digital pulse gas shielded welding machine according to claim 1, characterized in that: An IGBT heat sink and a secondary rectifier board heat sink are installed on the left and right sides of the bottom plate, wherein a primary IGBT module is installed on the IGBT heat sink, and an IGBT absorption board is arranged inside the IGBT module for absorbing peak voltage. The positive and negative poles of the IGBT module are also connected in parallel with absorption capacitors for absorbing voltage spikes; there are two secondary rectifier boards on the secondary rectifier board heat sink for rectifying and outputting the inverted voltage, and the secondary rectifier output end is connected to the secondary rectifier heat sink on the right side, and then connected to the output inductor. A feedback Hall sensor is installed on the output inductor aluminum strip for detecting the output current signal and providing current feedback to the main control board, and the output inductor is connected to the positive pole quick socket on the front panel.

5. A digital pulse gas shielded welding machine according to claim 1, characterized in that: A three-phase rectifier bridge and a filter capacitor board are installed on the middle board near the upper part of the rear panel to filter the power grid after rectification. A drive box is installed above the middle position, and a drive circuit board is installed inside. The output of the drive box is connected to the drive pins of the left and right primary IGBT modules respectively to drive the primary IGBT modules. A power transformer is installed at the front upper position of the middle board to provide AC power to the main control board. In addition, a bracket is installed above the power transformer, and the main control board and PWM board are installed on the bracket. The main control board is used for calculating various parameters and outputting given signals to the PWM board. The main control board and the front display board are connected for data communication. The PWM board mainly outputs a drive signal to connect the primary of the drive box to drive the primary IGBT module. In addition, two main transformers are installed on the left and right sides below the middle board. The primary of the main transformer is connected in series, and the two ends of the primary are connected to the output ends of the left and right primary IGBT modules, and the secondary is connected to the left and right secondary rectifier boards, and then output after rectification. The center taps of the two main transformers are connected in parallel to the negative pole of the quick socket of the front panel to improve heat dissipation and reliability.

6. A digital pulse gas shielded welding machine according to claim 1, characterized in that: Four casters are arranged under the bottom plate for quickly moving the machine.

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