CN204018921U - A kind of welding and cutting device - Google Patents
A kind of welding and cutting device Download PDFInfo
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- CN204018921U CN204018921U CN201420180940.9U CN201420180940U CN204018921U CN 204018921 U CN204018921 U CN 204018921U CN 201420180940 U CN201420180940 U CN 201420180940U CN 204018921 U CN204018921 U CN 204018921U
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Abstract
A kind of welding and cutting device, comprise shell body and control circuit board, described control circuit board comprises master controller and peripheral circuit, peripheral circuit comprises interconnective EMI circuit successively, rectification circuit, filter circuit, inverter circuit, high frequency transformer, secondary rectification circuit, alternating current-direct current control circuit, EMI circuit, rectification circuit, filter circuit, inverter circuit, high frequency transformer, secondary rectification circuit, alternating current-direct current control circuit is connected with master controller input respectively, the first drive circuit is set between inverter circuit and master controller, the second drive circuit is set between alternating current-direct current control circuit and main control.Described master controller, EMI circuit, rectification circuit, filter circuit, inverter circuit, high frequency transformer, secondary rectification circuit, alternating current-direct current control circuit, the first drive circuit and the second drive circuit are the setting of standard component module.The utility model, directly by the modular circuit detachable maintaining damaging, is saved maintenance cost and time.
Description
Technical field
The utility model relates to welding technology field, particularly relates to a kind of welding and cutting device.
Background technology
All the time, welding and cutting device, for example the circuit structure of electric welding machine inside distributes and all has no large change, continue to use one after another traditional distributed structure, a wiring board as pcb board on the loose multiple circuit of realizing electric welding function that arranges, in prior art, there is following weak point in the circuit structure of this scattered distribution: because circuit structure is loose, when electric welding machine breaks down while needing repairing, the fault that also must carry out monoblock wiring board by professional maintenance personal is got rid of, thereby to maintenance, cause unnecessary difficulty, maintenance process is numerous and diverse.
As shown in Figure 1, the circuit structure of traditional electrical welding machine mainly comprises following a few part to the circuit structure of traditional electrical welding machine: a wiring board, adopt distributing setting master board in the circuit board, rectification circuit, filter circuit, inverter circuit, high frequency transformer, secondary rectification circuit, alternating current-direct current control circuit, drive circuit and feedback circuit, rectification circuit, filter circuit, inverter circuit, high frequency transformer, secondary rectification circuit and alternating current-direct current control circuit are electrically connected to successively, inverter circuit is also connected with drive circuit, drive circuit connects master controller, drive circuit is used for driving inverter circuit work, and alternating current-direct current control circuit connects feedback circuit, and feedback circuit connects master controller, feedback circuit is for gathering the output signal of alternating current-direct current control circuit, master controller is worked according to the signal controlling welding gun of feedback circuit feedback, wherein, and rectification circuit, filter circuit, inverter circuit, high frequency transformer, secondary rectification circuit, alternating current-direct current control circuit, drive circuit and feedback electricity all scattered layout in the circuit board, to realize the basic function of each circuit.Wherein, master controller must first receive the signal of feedback circuit output, could weld function according to signal controlling welding gun, for passive type is controlled.
Utility model content
The purpose of this utility model is to overcome the deficiencies in the prior art, and a kind of welding and cutting device is provided, and easily fixes a breakdown, easy to maintenance, has saved maintenance cost.
In order to achieve the above object, the technical solution adopted in the utility model is:
A kind of welding and cutting device, described welding and cutting device comprises shell body and control circuit board, control circuit board is arranged on shell body inside, described control circuit board comprises master controller and peripheral circuit, peripheral circuit comprises interconnective EMI circuit (Electromagnetic Interference successively, electromagnetic interference), rectification circuit, filter circuit, inverter circuit, high frequency transformer, secondary rectification circuit, alternating current-direct current control circuit, EMI circuit, rectification circuit, filter circuit, inverter circuit, high frequency transformer, secondary rectification circuit, alternating current-direct current control circuit is connected with master controller input respectively, the first drive circuit is set between inverter circuit and master controller, the second drive circuit is set between alternating current-direct current control circuit and main control.
Further, described the first drive circuit comprises: positive supply circuit, negative supply circuit, buffer circuit, control signal device, voltage detecting circuit, current detection circuit, gate-drive and high power device; The collector terminal of high power device is provided with voltage detecting point, and emitter terminal is provided with current detecting point; Positive supply circuit, negative supply circuit and buffer circuit are connected with the input of control signal device respectively, and the input of control signal device also signal connects master controller; The output of control signal device is series voltage testing circuit, current detection circuit and gate-drive respectively, and gate-drive is controlled the gate pole of first power device; The colelctor electrode of high power device is put series voltage testing circuit and inverter circuit respectively by voltage detecting, and the emitter stage of high power device is put series current testing circuit and high frequency transformer respectively by current detecting.
Further, described the second drive circuit comprises first, second, third and 4 wheel driven moving cell, and each driver element comprises a positive supply circuit, a negative supply circuit, a buffer circuit, a control signal device, a voltage detecting circuit, a current detection circuit, a gate-drive and a high power device; The collector terminal of each high power device is provided with voltage detecting point, and emitter terminal is all provided with current detecting point; Positive supply circuit, negative supply circuit and buffer circuit are connected with the input of control signal device respectively, and the input of control signal device also signal connects master controller; The output of control signal device is series voltage testing circuit, current detection circuit and gate-drive respectively, and gate-drive is controlled the gate pole of high power device;
In the first and the 3rd driver element, the colelctor electrode of each high power device is put the voltage detecting circuit of connecting respectively in alternating current-direct current control circuit and corresponding driver element by voltage detecting, the emitter stage of each high power device is put the current detection circuit of connecting respectively in high frequency transformer and corresponding driver element by current detecting;
Second and 4 wheel driven moving cell in, the colelctor electrode of each high power device is put the voltage detecting circuit of connecting respectively in high frequency transformer and corresponding driver element by voltage detecting, the emitter stage of each high power device is put the current detection circuit of connecting respectively in alternating current-direct current control circuit and corresponding driver element by current detecting;
Also the connect colelctor electrode of the high power device in the second driver element of the emitter stage of the high power device in the first driver element; Also the connect colelctor electrode of the high power device in 4 wheel driven moving cell of the emitter stage of the high power device in the 3rd driver element.
Described control circuit board has input and output, and input is electrically connected to external power supply, and output is electrically connected to welding gun.
Described welding and cutting device also comprises the first adjusting knob and the second adjusting knob, and described the first adjusting knob and the second adjusting knob are electrically connected to respectively described master controller, and described the first adjusting knob and the second adjusting knob expose to described shell body outer surface.
Described control circuit board also comprises a memory, and described memory is electrically connected to described master controller.
Described welding and cutting device also comprises a man-machine interface, and described man-machine interface is electrically connected to described master controller, and described man-machine interface is arranged on described shell body outer surface.
Described control circuit board also comprises a communication interface, and described communication interface is electrically connected to described master controller, and is exposed to the outer surface of described shell body.
Described master controller, EMI circuit, rectification circuit, filter circuit, inverter circuit, high frequency transformer, secondary rectification circuit, alternating current-direct current control circuit, the first drive circuit and the second drive circuit are the setting of standard component module.
Between described standard component module, by utility outlets, be electrically connected to.
Compared with prior art, the beneficial effects of the utility model are:
The first,, by circuit structure being made to standard component module, when electric welding machine breaks down while needing repairing, maintenance personal is according to fault type, directly by the modular circuit detachable maintaining damaging, without complete machine investigation, saving maintenance cost and time;
The second, master controller does not need to gather in advance by feedback circuit the output signal of alternating current-direct current control circuit, again according to the signal controlling electric welding machine work gathering, but can directly by the second drive circuit, drive alternating current-direct current control circuit, make welding gun work, change from passive to active, improved operating efficiency;
Three, by commonly using welding operating mode Parameter storage in memory, during welding, only need to call the duty parameter of storage, after selected duty parameter, welding and cutting device can enter welded condition automatically, time saving and energy saving, also avoid too much artifact to participate in causing the appearance of unnecessary error simultaneously, affect welding quality.
Accompanying drawing explanation
fig. 1 is traditional welding circuitry structure chart;
Fig. 2 is embodiment 1 circuit structure theory diagram of the present utility model;
Fig. 3 is the structural representation of the first drive circuit in the utility model embodiment 1;
Fig. 4 is one of structural representation of the second drive circuit in the utility model embodiment 1;
Fig. 5 be the second drive circuit in the utility model embodiment 1 structural representation two;
Fig. 6 is embodiment 2 circuit structure theory diagrams of the present utility model.
The specific embodiment
The purport of the utility model information is, for the situations that adopt the circuit structure of loose distribution in current welding and cutting device, to provide a kind of modularization welding and cutting device, to overcome the above-mentioned defect existing in prior art more.For this reason, the utility model adopts following technical scheme (take electric welding machine as example, other welding and cutting devices can adopt same principle), and minute two embodiment annotate.
Below in conjunction with embodiment, with reference to accompanying drawing, be elaborated, to technical characterictic of the present utility model and advantage are interpretated more in-depth.
embodiment 1
As shown in Figure 2, electric welding machine comprises shell body and control circuit board, and control circuit board is arranged on shell body inside, control circuit board has input and output, input is used for being electrically connected to external power supply, and output is used for being electrically connected to welding gun, and control circuit board comprises master controller and peripheral circuit.
Peripheral circuit comprises EMI circuit, rectification circuit, filter circuit, inverter circuit, high frequency transformer, secondary rectification circuit, alternating current-direct current control circuit, the first drive circuit and the second drive circuit, input, EMI circuit, rectification circuit, filter circuit, inverter circuit, high frequency transformer, secondary rectification circuit, alternating current-direct current control circuit and output are electrically connected to successively, inverter circuit is also electrically connected to the first drive circuit, alternating current-direct current control circuit is also electrically connected to the second drive circuit, EMI circuit, rectification circuit, filter circuit, secondary rectification circuit, the first drive circuit, the second drive circuit and output are electrically connected to respectively master controller.By the second drive circuit is set, make master controller not need to gather in advance by feedback circuit the output signal of alternating current-direct current control circuit, again according to the signal controlling electric welding machine work gathering, but can directly by the second drive circuit, drive alternating current-direct current control circuit, make welding gun work, change from passive to active, improved operating efficiency.
In the present embodiment, as shown in Figure 3, the first drive circuit comprises: positive supply circuit, negative supply circuit, buffer circuit, control signal device, voltage detecting circuit, current detection circuit, gate-drive and high power device; The collector terminal of high power device is provided with voltage detecting point, and emitter terminal is provided with current detecting point; Positive supply circuit, negative supply circuit and buffer circuit are connected with the input of control signal device respectively, and the input of control signal device also signal connects master controller; The output of control signal device is series voltage testing circuit, current detection circuit and gate-drive respectively, and gate-drive is controlled the gate pole of first power device; The colelctor electrode of high power device is put series voltage testing circuit and inverter circuit respectively by voltage detecting, and the emitter stage of high power device is put series current testing circuit and high frequency transformer respectively by current detecting.
Power supply after rectification circuit, filter circuit and inverter circuit rectification, filtering and inversion is put the colelctor electrode of input high power device by voltage detecting successively; between master controller and control signal device, can communicate; thereby make the first drive circuit drive inverter circuit, current detection circuit and voltage detecting circuit have circuit protection effect.Wherein, first power device can preferably be selected IGBT.
In the present embodiment, as shown in Figures 4 and 5, the second drive circuit comprises first, second, third and 4 wheel driven moving cell, and each driver element comprises a positive supply circuit, a negative supply circuit, a buffer circuit, a control signal device, a voltage detecting circuit, a current detection circuit, a gate-drive and a high power device; The collector terminal of each high power device is provided with voltage detecting point, and emitter terminal is all provided with current detecting point; Positive supply circuit, negative supply circuit and buffer circuit are connected with the input of control signal device respectively, and the input of control signal device also signal connects master controller; The output of control signal device is series voltage testing circuit, current detection circuit and gate-drive respectively, and gate-drive is controlled the gate pole of high power device;
In the first and the 3rd driver element, the colelctor electrode of each high power device is put the voltage detecting circuit of connecting respectively in alternating current-direct current control circuit and corresponding driver element by voltage detecting, the emitter stage of each high power device is put the current detection circuit of connecting respectively in high frequency transformer and corresponding driver element by current detecting;
Second and 4 wheel driven moving cell in, the colelctor electrode of each high power device is put the voltage detecting circuit of connecting respectively in high frequency transformer and corresponding driver element by voltage detecting, the emitter stage of each high power device is put the current detection circuit of connecting respectively in alternating current-direct current control circuit and corresponding driver element by current detecting;
Also the connect colelctor electrode of the high power device in the second driver element of the emitter stage of the high power device in the first driver element; Also the connect colelctor electrode of the high power device in 4 wheel driven moving cell of the emitter stage of the high power device in the 3rd driver element.
Four high power devices in the second drive circuit can preferably be selected IGBT.The positive pole of the power supply after secondary rectification circuit rectification connects respectively the colelctor electrode of the high power device in the first driver element and the 3rd driver element by alternating current-direct current control circuit, the negative pole of the power supply after secondary rectification connects respectively the emitter stage of the high power device in the second driver element and 4 wheel driven moving cell by alternating current-direct current control circuit.When master controller sends a signal to control signal device, while controlling the high power device conducting in the first driver element and 4 wheel driven moving cell, the second drive circuit output dc source; When master controller sends a signal to control signal device, when the combination wheel conductance that the combination that two high power devices in control first and 4 wheel driven moving cell form and two high power devices in the second and the 3rd driver element form leads to, the second drive circuit output AC power source; When master controller sends a signal to control signal device, control first and 4 wheel driven moving cell in high power device intermittently during conducting, the second drive circuit output pulse power.
Special needs to be pointed out is, the utility model is not limited to above embodiment, and wherein, high-frequency electrical depressor is as load in the first and second drive circuits, identical with the high frequency transformer shown in Fig. 1 and 2, the alternating current-direct current control circuit in the second drive circuit is alternating current-direct current control circuit shown in Fig. 2.In the second drive circuit, between four driver elements, by buffer circuit, separate the datum mark of each voltage.In Fig. 5, the structure of the third and fourth driver element is identical with the first and second driver elements, thereby does not all draw in this figure, is not repeated herein.
Master controller, EMI circuit, rectification circuit, filter circuit, inverter circuit, high frequency transformer, secondary rectification circuit, alternating current-direct current control circuit, the first drive circuit and the second drive circuit all adopt modularization setting, module herein refers to that each circuit is all the hardware module that size is predetermined one by one, be that they are all standard component module, each standard component module is according to order of connection setting reserved location place in the circuit board, between standard component module, adopt utility outlets to be electrically connected to, by circuit structure being made to standard component module, when electric welding machine breaks down while needing repairing, maintenance personal is according to fault type, directly by the modular circuit detachable maintaining damaging, without complete machine, investigate, save maintenance cost and time.
The various interfering signals that EMI circuit is come in by electrical network for filtering, can adopt circuit design in prior art, the first drive circuit is used for driving inverter circuit work, the second drive circuit is for Real Time Drive alternating current-direct current control circuit output AC electricity or direct current, specifically for realizing switching or the combination of interchange, direct current, pulse, low frequency, high frequency electric source, thereby drive welding gun work, alternating current-direct current control circuit is for output AC or direct current.
In this embodiment, master controller does not need to gather in advance by feedback circuit the output signal of alternating current-direct current control circuit, then controls electric welding machine work, but can directly by the second drive circuit, drive alternating current-direct current control circuit, make welding gun work, change from passive to active.
embodiment 2
As shown in Figure 3, electric welding machine comprises shell body and control circuit board, and control circuit board is arranged on shell body inside, control circuit board has input and output, input is used for being electrically connected to external power supply, and output is used for being electrically connected to welding gun, and control circuit board comprises master controller and peripheral circuit.
Peripheral circuit comprises EMI circuit, rectification circuit, filter circuit, inverter circuit, high frequency transformer, secondary rectification circuit, alternating current-direct current control circuit, the first drive circuit and the second drive circuit, input, EMI circuit, rectification circuit, filter circuit, inverter circuit, high frequency transformer, secondary rectification circuit, alternating current-direct current control circuit and output are electrically connected to successively, inverter circuit is also electrically connected to the first drive circuit, alternating current-direct current control circuit is also electrically connected to the second drive circuit, EMI circuit, rectification circuit, filter circuit, secondary rectification circuit, the first drive circuit, the second drive circuit and output are electrically connected to respectively master controller.
As different from Example 1, electric welding machine also comprises man-machine interface and two adjusting knobs (the first adjusting knob and the second adjusting knob) to embodiment 2, and control circuit board also comprises memory and communication interface.
Man-machine interface and two adjusting knobs are electrically connected to master controller respectively, and man-machine interface is arranged at the outer surface of shell body, and two adjusting knobs expose to shell body.
Memory is for the corresponding various conventional duty parameter of store electricity welding machine, and duty parameter can be when electric welding machine dispatches from the factory, to write direct in memory to store.Memory is electrically connected to master controller, and man-machine interface is electrically connected to master controller, and man-machine interface can be LED display.By commonly using welding operating mode Parameter storage in memory, during welding, only need to call the duty parameter of storage, after selected duty parameter, welding and cutting device can enter welded condition automatically, time saving and energy saving, also avoid too much artifact to participate in causing the appearance of unnecessary error simultaneously, affect welding quality.
Input connects external power supply, makes man-machine interface energising, can see in man-machine interface and be provided with the icon that homepage, welding record, this machine information and parameter arrange, and by the first adjusting knob, can choose a certain icon, can enter the page that icon is corresponding.Such as: if choose homepage icon to enter the homepage page, on the homepage page, show every duty parameter corresponding to when welding, the size of as wide in welding current, wire feed rate, thickness of slab, mother metal, seam, arc stiffness and other parameters etc.; If choose parameter that icon is set, entering parameter arranges after the page, parameter arranges the page and comprises that successively the mother metal chooser page, thickness of slab are set subpage frame, weld width subpage frame, wire feed rate subpage frame, arc stiffness subpage frame and other arrange subpage frame, by regulating the first adjusting knob can realize the switching of each subpage frame, in each subpage frame, show the duty parameter corresponding with subpage frame.
The first adjusting knob is for choosing the icon showing in man-machine interface, and realize in respective icon the switching of each corresponding subpage frame, the second adjusting knob arranges the selection of each subpage frame duty parameter of the page for parameter, the first adjusting knob and the second adjusting knob are subject to main controller controls, are also provided with handle on shell body.If entering parameter arranges after each subpage frame in the page, the duty parameter showing on each subpage frame does not have this and welds needed duty parameter, operator can also re-start by the second adjusting knob the setting of duty parameter, the duty parameter resetting can deposit in the memory of control circuit board in real time, prepares against use while carrying out same weld next time.
Further, control circuit board also comprises communication interface, communication interface is electrically connected to master controller, the communication interface housing outer surface that exposes outside, communication interface can be USB interface or other data communication port, and communication interface, for connecting the data wire on External memory equipment, is passed through data wire, by in the multiple industrial and mineral parameter read-in memory being stored in External memory equipment, during for welding, master controller calls.In usually using, if needed duty parameter is not present in memory during welding, operator can carry out by the second adjusting knob the setting of duty parameter, the duty parameter setting can real-time storage in memory, or operator also can be by suitable duty parameter the data wire by External memory equipment write direct master controller or write memory, next time, while again carrying out same welding, master controller can directly call from memory.For the welding operation of carrying out at every turn, master controller can initiatively generate welding record, and memory can also the each welding record of autostore.
In this embodiment, the electric welding machine course of work is introduced: input access external power supply, output connects welding gun, start, man-machine interface energising shows, by the first adjusting knob, choose parameter that icon is set, enter each subpage frame that parameter arranges, regulate the first adjusting knob, carry out the switching of subpage frame, and the duty parameter of storing in memory is respectively in the corresponding demonstration of each subpage frame, by the selected corresponding a plurality of duty parameters of the second adjusting knob, after selected, can choose homepage icon by the first adjusting knob, enter the homepage page, a plurality of duty parameters after selected now show on the homepage page of man-machine interface, the start key that rotation is electrically connected to main controller, the work of main controller controls peripheral circuit, electric welding machine starts according to selected duty parameter, start welding.
By the technical scheme in above embodiment, the utility model is carried out to clear, complete description, obvious described embodiment is the embodiment of the utility model part, rather than whole embodiment.Embodiment based in the utility model, those of ordinary skills are not making the every other embodiment obtaining under creative work prerequisite, all belong to the scope of the utility model protection.
Claims (10)
1. a welding and cutting device, described welding and cutting device comprises shell body and control circuit board, control circuit board is arranged on shell body inside, it is characterized in that: described control circuit board comprises master controller and peripheral circuit, peripheral circuit comprises interconnective EMI circuit successively, rectification circuit, filter circuit, inverter circuit, high frequency transformer, secondary rectification circuit, alternating current-direct current control circuit, EMI circuit, rectification circuit, filter circuit, inverter circuit, high frequency transformer, secondary rectification circuit, alternating current-direct current control circuit is connected with master controller input respectively, the first drive circuit is set between inverter circuit and master controller, the second drive circuit is set between alternating current-direct current control circuit and main control.
2. welding equipment according to claim 1, is characterized in that, described the first drive circuit comprises: positive supply circuit, negative supply circuit, buffer circuit, control signal device, voltage detecting circuit, current detection circuit, gate-drive and high power device; The collector terminal of high power device is provided with voltage detecting point, and emitter terminal is provided with current detecting point; Positive supply circuit, negative supply circuit and buffer circuit are connected with the input of control signal device respectively, and the input of control signal device also signal connects master controller; The output of control signal device is series voltage testing circuit, current detection circuit and gate-drive respectively, and gate-drive is controlled the gate pole of high power device; The colelctor electrode of high power device is put series voltage testing circuit and inverter circuit respectively by voltage detecting, and the emitter stage of high power device is put series current testing circuit and high frequency transformer respectively by current detecting.
3. welding equipment according to claim 1, it is characterized in that: described the second drive circuit comprises first, second, third and 4 wheel driven moving cell, and each driver element comprises a positive supply circuit, a negative supply circuit, a buffer circuit, a control signal device, a voltage detecting circuit, a current detection circuit, a gate-drive and a high power device; The collector terminal of each high power device is provided with voltage detecting point, and emitter terminal is all provided with current detecting point; Positive supply circuit, negative supply circuit and buffer circuit are connected with the input of control signal device respectively, and the input of control signal device also signal connects master controller; The output of control signal device is series voltage testing circuit, current detection circuit and gate-drive respectively, and gate-drive is controlled the gate pole of high power device;
In the first and the 3rd driver element, the colelctor electrode of each high power device is put the voltage detecting circuit of connecting respectively in alternating current-direct current control circuit and corresponding driver element by voltage detecting, the emitter stage of each high power device is put the current detection circuit of connecting respectively in high frequency transformer and corresponding driver element by current detecting;
Second and 4 wheel driven moving cell in, the colelctor electrode of each high power device is put the voltage detecting circuit of connecting respectively in high frequency transformer and corresponding driver element by voltage detecting, the emitter stage of each high power device is put the current detection circuit of connecting respectively in alternating current-direct current control circuit and corresponding driver element by current detecting;
Also the connect colelctor electrode of the high power device in the second driver element of the emitter stage of the high power device in the first driver element; Also the connect colelctor electrode of the high power device in 4 wheel driven moving cell of the emitter stage of the high power device in the 3rd driver element.
4. welding and cutting device according to claim 1, is characterized in that: described control circuit board has input and output, and input is electrically connected to external power supply, and output is electrically connected to welding gun.
5. welding and cutting device according to claim 1, it is characterized in that: described welding and cutting device also comprises the first adjusting knob and the second adjusting knob, described the first adjusting knob and the second adjusting knob are electrically connected to respectively described master controller, and described the first adjusting knob and the second adjusting knob expose to described shell body outer surface.
6. welding and cutting device according to claim 1, is characterized in that: described control circuit board also comprises a memory, and described memory is electrically connected to described master controller.
7. welding and cutting device according to claim 1, is characterized in that: described welding and cutting device also comprises a man-machine interface, and described man-machine interface is electrically connected to described master controller, and described man-machine interface is arranged on described shell body outer surface.
8. welding and cutting device according to claim 1, is characterized in that: described control circuit board also comprises a communication interface, and described communication interface is electrically connected to described master controller, and is exposed to the outer surface of described shell body.
9. according to the welding and cutting device described in any one in claim 1-8, it is characterized in that: described master controller, EMI circuit, rectification circuit, filter circuit, inverter circuit, high frequency transformer, secondary rectification circuit, alternating current-direct current control circuit, the first drive circuit and the second drive circuit are the setting of standard component module.
10. welding and cutting device according to claim 9, is characterized in that: between described standard component module, by utility outlets, be electrically connected to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420180940.9U CN204018921U (en) | 2014-04-15 | 2014-04-15 | A kind of welding and cutting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420180940.9U CN204018921U (en) | 2014-04-15 | 2014-04-15 | A kind of welding and cutting device |
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| Publication Number | Publication Date |
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| CN204018921U true CN204018921U (en) | 2014-12-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420180940.9U Expired - Fee Related CN204018921U (en) | 2014-04-15 | 2014-04-15 | A kind of welding and cutting device |
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| CN (1) | CN204018921U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017063252A1 (en) * | 2015-10-14 | 2017-04-20 | 刘昇澔 | Alternating-current and direct-current consumable electrode welder |
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2014
- 2014-04-15 CN CN201420180940.9U patent/CN204018921U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017063252A1 (en) * | 2015-10-14 | 2017-04-20 | 刘昇澔 | Alternating-current and direct-current consumable electrode welder |
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| CF01 | Termination of patent right due to non-payment of annual fee |