CN202910440U - Metal-inert gas welding (MIG) welder circuit with centralized adjustment function - Google Patents
Metal-inert gas welding (MIG) welder circuit with centralized adjustment function Download PDFInfo
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- CN202910440U CN202910440U CN 201220523188 CN201220523188U CN202910440U CN 202910440 U CN202910440 U CN 202910440U CN 201220523188 CN201220523188 CN 201220523188 CN 201220523188 U CN201220523188 U CN 201220523188U CN 202910440 U CN202910440 U CN 202910440U
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Abstract
The utility model provides a metal-inert gas welding (MIG) welder circuit with a centralized adjustment function, belongs to the technical field of welders, and solves the problem of the traditional MIG welder in the prior art that matching of output voltage and wire feeding speed is needed to be manually adjusted. The MIG welder circuit comprises a driving module, a welder main loop used for outputting welding voltage, a pulse-width modulation (PWM) control module used for controlling input voltage of a wire feeding motor, a wire feeding voltage adjustment unit and a wire feeding speed adjustment unit, wherein the PWM control module is connected with the welder main loop through the driving module, and the wire feeding voltage adjustment unit and the wire feeding speed adjustment unit are connected with the PWM control module. The wire feeding voltage adjustment unit comprises two resistors in parallel connection, and output end of the wire feeding voltage adjustment unit and the output end of the wire feeding speed adjustment unit are connected with the wire feeding motor, the output end of the welder main loop is connected with a detection unit used for detecting welding output current and welding output voltage, and the detection unit and the PWM control module are in feedback connection. The MIG welder circuit achieves that the output welding voltage is matched with the wire feeding speed by adjusting the motor voltage through a simple centralized adjustment circuit.
Description
Technical field
The utility model belongs to the electric welding machine technical field, relates to a kind of MIG electric welding machine circuit with unified adjusting.
Background technology
Electric welding machine is that the high-temperature electric arc that utilizes positive and negative polarities to produce when instantaneous short circuit comes scolder and the materials to be welded on the consumable electrode, reach the purpose that makes their combinations, actual is that electric welding machine is exactly a powerful transformer, and external characteristics is the welding rod characteristic that rear voltage sharply descends of igniting.Because electric welding machine self has flexibly, simple, convenient, firmly, reliable characteristics, a bit be widely used in each industrial circle after the welding even with parent material is equal to intensity.The development kind of electric welding machine is also more and more, and wherein a kind of is exactly the electric welding machine with gas shield, and particularly the MIG electric welding machine is widely used especially, and the MIG electric welding machine is the consumable electrode noble gas protective electric welding machine, namely contains consumable electrode Ar arc-welding.
Send to want to reach perfect welding effect, traditional MIG electric welding machine needs the cooperation of manual adjustments output voltage and wire feed rate, cooperates formula that output voltage U=0.05I+14 is arranged.Preseted in which type of wire feed rate approximately need how much voltage in the time of by the adjusting wire feed rate.Regulate thus.Belong to indivedual adjustings.The indivedual adjusting refers to that the parameters on the circuit need to regulate respectively.Because indivedual defectives of regulating the matching precision that exists, the unified adjusting of welding machine is MIG electric welding machine developing direction.
Summary of the invention
The utility model is for existing problem, proposed a kind of MIG electric welding machine circuit with unified adjusting, thereby this circuit reaches the output weldingvoltage by the adjusting of simple unified regulating circuit by regulating electric machine voltage on traditional electric welding machine circuit and wire feed rate is complementary.
The utility model is realized by following technical proposal: a kind of MIG electric welding machine circuit with unified adjusting, comprise driver module, the welding machine major loop of output weldingvoltage and be used for the PWM control module of control wire feeding motor input voltage, described PWM control module connects the welding machine major loop by driver module, it is characterized in that, this circuit also comprises wire feed voltage-regulation unit and the wire feed rate regulon that is connected with the PWM control module, described wire feed voltage-regulation unit comprises two resistance that are connected in parallel, the output of described wire feed voltage-regulation unit is connected with the wire feed rate regulon and is connected wire feeding motor, the output of described welding machine major loop is connected with the detecting unit for detection of welding output current and voltage, described detecting unit feedback link PWM control module.
The PWM control module is by receiving detecting unit butt welding machine major loop welding output voltage current feedback signal, regulate wire feeding motor voltage by wire feed voltage-regulation unit, regulate wire feeding motor speed by the wire feed rate regulon simultaneously, the control that the speed of wire feeding motor speed is regulated by the wire feed size of current realizes.The simultaneously variation of wire feeding motor voltage returns to the PWM control module, and the PWM control module is according to the adjusting of wire feeding motor voltage, by driver module control welding machine major loop, so that welding output is subjected to the impact of wire feed voltage-regulation.This shows that this circuit realizes the mutual adjusting can weld output voltage and wire feeding motor output voltage, and wire feed rate also is subjected to the adjusting of wire feeding motor output voltage, then welds output voltage, wire feeding motor output voltage and wire feed rate and mutually regulate and influence each other.So that weldingvoltage and wire feed rate to coupling, are welded more stable.
In the above-mentioned MIG electric welding machine circuit with unified adjusting, described wire feed voltage-regulation unit comprises two resistance that are connected in parallel, resistance value between described two resistance differs at least 5 times, the input of the resistance circuit after described two parallel connections connects pwm control circuit, and the output of the resistance circuit after described two parallel connections connects wire feeding motor by the control module of wire feeding motor.By and a di-resistance differ larger resistance and carry out dividing potential drop and regulate the control module that the wire feed output voltage is supplied with wire feeding motor, change the output pulse width of wire feeding motor control module, thereby realize that adjusting is to the wire feeding motor Voltage-output of wire feeding motor work.
In the above-mentioned MIG electric welding machine circuit with unified adjusting, described wire feed rate regulon comprises the resistance R that is connected with the PWM control module
33And resistance R
35, described resistance R
33Be connected in series resistance R
35, described resistance R
35Output connecting triode V
19Colelctor electrode, described triode V
19Base stage and triode V
20Base stage, described triode V
19Emitter stage and triode V
20Emitter stage connect described triode V
20The grounded collector line.The wire feeding motor input voltage passes through resistance R
33And resistance R
35Thereby regulate from triode V
19With triode V
20The electric current that flows through, so that the change of wire feeding motor output current, thereby the wire feed rate speed of change wire feeding motor.
In the above-mentioned MIG electric welding machine circuit with unified adjusting, described wire feed rate regulon also comprises the resistance R that is connected with the PWM control module
99, resistance R
99Output connects the control module of wire feeding motor.The PWM control module is passed through R
99Can realize the fine setting of wire feeding motor speed.
In the above-mentioned MIG electric welding machine circuit with unified adjusting, described welding machine major loop comprises a rectification filtering unit, inversion unit, step-down transformer and the secondary rectification unit that connects successively respectively, the input of a described rectification filtering unit connects power supply, described secondary rectification unit output connects welding machine, and the said PWM control module connects by driver module and connects inversion unit.Electric welding machine is a powerful transformer, external characteristics is the welding rod characteristic that rear voltage sharply descends of igniting, thereby drives pulse width signal and form specific external characteristics by driver module driving power switching device to the welding machine major loop from regulating by the PWM control module here.
In the above-mentioned MIG electric welding machine circuit with unified adjusting, described detecting unit comprises current feedback circuit and voltage feedback circuit, the input of described current feedback circuit and voltage feedback circuit is the connecting secondary rectification circuit respectively, described current feedback circuit output connects the PWM control module, and the logical diode forward of the output of described voltage feedback circuit connects the PWM control module.The PWM control module is according to the electric current and the voltage feedback signal that gather welding terminal, compare respectively and control the output voltage that the suitable driving pulse of pwm pulse circuit for generating generation is delivered to driver element control welding machine after calculating, simultaneously also wire feed voltage is regulated related adjusting wire feed rate.
Compared with prior art, the MIG electric welding machine circuit that the utlity model has unified adjusting has the following advantages:
1, the utility model passes through the adjusting of feedback welding machine output voltage regulating electric machine voltage by simple unified regulating circuit at traditional electric welding machine circuit, the simultaneously adjusting of electric moter voltage also affects the adjusting that output weldingvoltage and wire feed rate are complementary, monobasic is regulated the use that can grasp at short notice welding machine, the welding conditions that obtain fitting, the training of having saved the welder drops into, and enhances productivity.
2, the utility model makes circulation of adjusting formation of the output voltage electric current of two work of welding machine and wire feeding motor electrical quantity regulate by increasing welding machine output voltage feedback and current feedback like this, so that response speed is faster, welds more stable.
Description of drawings
Fig. 1 is schematic diagram of the present utility model;
Fig. 2 is that wire feeding motor voltage of the present utility model and wire feed rate are regulated schematic diagram.
The specific embodiment
Below be specific embodiment of the utility model, and by reference to the accompanying drawings, the technical solution of the utility model be further described, but the utility model is not limited to these embodiment.
As shown in Figure 1 and Figure 2, originally the MIG electric welding machine circuit that has a unified adjusting comprises the welding machine major loop of driver module, output weldingvoltage and is used for the PWM control module of control wire feeding motor input voltage, the PWM control module connects the welding machine major loop by driver module, the welding machine major loop comprises a rectification filtering unit, inversion unit, step-down transformer and the secondary rectification unit that connects successively respectively, the input of a rectification filtering unit connects power supply, the output of secondary rectification unit connects welding machine, and the PWM control module connects by driver module and connects inversion unit.
This circuit also comprises wire feed voltage-regulation unit and the wire feed rate regulon that is connected with the PWM control module, wire feed voltage-regulation unit comprises two resistance that are connected in parallel, the output of wire feed voltage-regulation unit is connected with the wire feed rate regulon and is connected wire feeding motor, the output of welding machine major loop is connected with the detecting unit for detection of welding output current and voltage, detecting unit feedback link PWM control module.Detecting unit comprises current feedback circuit and voltage feedback circuit, and the input of current feedback circuit and voltage feedback circuit is the connecting secondary rectification circuit respectively, and the current feedback circuit output connects the PWM control module, and the output of voltage feedback circuit leads to diode D
11Forward connects the PWM control module.
Wire feed voltage-regulation unit comprises two resistance that are connected in parallel, and is respectively resistance R
48And resistance R
49, resistance R
48Be connected in parallel and resistance R
49Two ends, resistance R
49Input connect PWM control module, resistance R
49Output connect the wire feeding motor control module, the resistance value between two the resistance differs at least 5 times, the resistance R here
48Select 150K Ω, resistance R
49Select 1M Ω.The input of the resistance circuit after two parallel connections connects the PWM control module, and the output of the resistance circuit after two parallel connections connects wire feeding motor by the control module of wire feeding motor.
The wire feed rate regulon comprises the resistance R that is connected with the PWM control module
33And resistance R
35, resistance R
33Be connected in series resistance R
35, resistance R
35Output connecting triode V
19Colelctor electrode, triode V
19Base stage and triode V
20Base stage, triode V
19Emitter stage and triode V
20Emitter stage connect triode V
20The grounded collector line.The wire feed rate regulon also comprises the resistance R that is connected with the PWM control module
99, resistance R
99Output connects the control module of wire feeding motor.The PWM control module is passed through R
99Can realize the fine setting of wire feeding motor speed.Originally having the PWM control module of MIG electric welding machine circuit of unified adjusting and the control module of wire feeding motor selects the UC2845 chip to realize control.In the welding machine major loop, increase protected location, for the protection of the load overcurrent overvoltage.
Below be the operation principle that the utlity model has the MIG electric welding machine circuit of unified adjusting:
The PWM control module is by receiving detecting unit butt welding machine major loop welding output voltage current feedback signal, regulate wire feeding motor voltage by wire feed voltage-regulation unit, regulate wire feeding motor speed by the wire feed rate regulon simultaneously, the control that the speed of wire feeding motor speed is regulated by the wire feed size of current realizes.The simultaneously variation of wire feeding motor voltage returns to the PWM control module, and the PWM control module is according to the adjusting of wire feeding motor voltage, by driver module control welding machine major loop, so that welding output is subjected to the impact of wire feed voltage-regulation.
The driving signal that modulates that driver module is sent the PWM control module here amplifies the rear drive device for power switching such as reliable and stable work such as IGBT module, metal-oxide-semiconductors, simultaneously high-voltage large current and PWM control module on the welding machine major loop switching device is isolated.The effect of PWM control module is exactly according to the given electric current of panel, voltage parameter, gathers simultaneously electric current, the voltage signal of welding terminal, compares respectively the driving pulse that the generation of control pwm pulse circuit for generating is fit to after calculating and delivers to driver module.
When regulating wire-feed motor speed, in the PWM control module, preseted in which type of wire feed rate approximately need how much voltage.The feedback circuit Real-time Collection welding machine output voltage of welding machine output voltage and electric current carries out Auto-matching in the PWM control module.The welding requirements of MIG is to need welding machine output voltage and wire feed rate to reach coupling, could arrive welding effect.This welding machine only need just can weld by the wire feeding motor voltage-regulation, and the wire feeding motor voltage-regulation is regulated with the overpotential device and passed through resistance R
99Carry out the wire feed rate fine setting, the wire feed input voltage passes through resistance R
33And resistance R
35The stream electricity is regulated, and the size stream that changes input current is crossed triode V
19With triode V
20Thereby reaching wire feed rate regulates.When regulating the welding machine output voltage, the wire feeding motor input voltage passes through resistance R
49And resistance R
48Regulate the output pulse width of wire feeding motor control module UC2845, to arrive the adjusting of wire feeding motor output voltage.Regulate when so just having reached wire feed output voltage and wire feed rate by welding machine output adjusting, so just realized the monobasic adjusting.
Specific embodiment described herein only is to the utility model explanation for example.The utility model person of ordinary skill in the field can make various modifications or replenishes or adopt similar mode to substitute described specific embodiment, but can't depart from spirit of the present utility model or surmount the defined scope of appended claims.
Claims (6)
1. MIG electric welding machine circuit with unified adjusting, comprise driver module, the welding machine major loop of output weldingvoltage and be used for the PWM control module of control wire feeding motor input voltage, described PWM control module connects the welding machine major loop by driver module, it is characterized in that, this circuit also comprises wire feed voltage-regulation unit and the wire feed rate regulon that is connected with the PWM control module, described wire feed voltage-regulation unit comprises two resistance that are connected in parallel, the output of described wire feed voltage-regulation unit is connected with the wire feed rate regulon and is connected wire feeding motor, the output of described welding machine major loop is connected with the detecting unit for detection of welding output current and voltage, described detecting unit feedback link PWM control module.
2. the MIG electric welding machine circuit with unified adjusting according to claim 1, it is characterized in that, described wire feed voltage-regulation unit comprises two resistance that are connected in parallel, resistance value between described two resistance differs at least 5 times, the input of the resistance circuit after described two parallel connections connects pwm control circuit, and the output of the resistance circuit after described two parallel connections connects wire feeding motor by the control module of wire feeding motor.
3. the MIG electric welding machine circuit with unified adjusting according to claim 2 is characterized in that, described wire feed rate regulon comprises the resistance R that is connected with the PWM control module
33And resistance R
35, described resistance R
33Be connected in series resistance R
35, described resistance R
35Output connecting triode V
19Colelctor electrode, described triode V
19Base stage and triode V
20Base stage, described triode V
19Emitter stage and triode V
20Emitter stage connect described triode V
20The grounded collector line.
4. the MIG electric welding machine circuit with unified adjusting according to claim 3 is characterized in that, described wire feed rate regulon also comprises the resistance R that is connected with the PWM control module
99, resistance R
99Output connects the control module of wire feeding motor.
5. according to claim 1 and 2 or 3 or 4 described MIG electric welding machine circuits with unified adjusting, it is characterized in that, described welding machine major loop comprises a rectification filtering unit, inversion unit, step-down transformer and the secondary rectification unit that connects successively respectively, the input of a described rectification filtering unit connects power supply, described secondary rectification unit output connects welding machine, and the said PWM control module connects by driver module and connects inversion unit.
6. the MIG electric welding machine circuit with unified adjusting according to claim 5, it is characterized in that, described detecting unit comprises current feedback circuit and voltage feedback circuit, the input of described current feedback circuit and voltage feedback circuit is the connecting secondary rectification circuit respectively, described current feedback circuit output connects the PWM control module, and the logical diode forward of the output of described voltage feedback circuit connects the PWM control module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220523188 CN202910440U (en) | 2012-10-11 | 2012-10-11 | Metal-inert gas welding (MIG) welder circuit with centralized adjustment function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220523188 CN202910440U (en) | 2012-10-11 | 2012-10-11 | Metal-inert gas welding (MIG) welder circuit with centralized adjustment function |
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| Publication Number | Publication Date |
|---|---|
| CN202910440U true CN202910440U (en) | 2013-05-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220523188 Expired - Fee Related CN202910440U (en) | 2012-10-11 | 2012-10-11 | Metal-inert gas welding (MIG) welder circuit with centralized adjustment function |
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|---|---|
| CN (1) | CN202910440U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103962688A (en) * | 2014-05-14 | 2014-08-06 | 无锡市大德科技有限公司 | Unified adjusting circuit of gas shielded welding machine |
| CN107088695A (en) * | 2017-05-31 | 2017-08-25 | 中山市金锐焊接设备有限公司 | Voltage and current regulation control circuit of inverter welding machine |
-
2012
- 2012-10-11 CN CN 201220523188 patent/CN202910440U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103962688A (en) * | 2014-05-14 | 2014-08-06 | 无锡市大德科技有限公司 | Unified adjusting circuit of gas shielded welding machine |
| CN103962688B (en) * | 2014-05-14 | 2015-11-18 | 无锡市大德科技有限公司 | The unified regulating circuit of gas shielded welding machine |
| CN107088695A (en) * | 2017-05-31 | 2017-08-25 | 中山市金锐焊接设备有限公司 | Voltage and current regulation control circuit of inverter welding machine |
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|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130501 Termination date: 20151011 |
|
| EXPY | Termination of patent right or utility model |