CN206464675U - Gas-shielded welder - Google Patents
Gas-shielded welder Download PDFInfo
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- CN206464675U CN206464675U CN201621470564.2U CN201621470564U CN206464675U CN 206464675 U CN206464675 U CN 206464675U CN 201621470564 U CN201621470564 U CN 201621470564U CN 206464675 U CN206464675 U CN 206464675U
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Abstract
The utility model discloses a kind of gas-shielded welder, it includes control circuit, inverter circuit, main transformer, welding machine rectification circuit, welding machine arc electrode, rectification speed governing rectification circuit, wire feeding motor, current feedback circuit；Inverter circuit exports rectangular pulse waveform to main transformer armature winding；The input of welding machine rectification circuit connects main transformer welding machine secondary windings, exports welder arc electrodes；The input of rectification alignment circuit connects main transformer auxiliary secondary winding, and output connects wire feeding motor；Current feedback circuit is used for the electric current for gathering welding machine arc electrode；In crawl wire feed state, if the electric current of welding machine arc electrode is more than setting value, control circuit enters false touch guard mode, and it is that welding machine arc electrode and rectification alignment circuit are powered to control inverter circuit to stop.Gas-shielded welder of the present utility model, can not additionally for wire feeding motor increase power supply on the premise of ensure wire feeding motor can quick smooth wire feed, sticked together when can preventing welding wire and workpiece from contacing by mistake again.
Description
Technical field
The utility model is related to electric welding machine technology, more particularly to a kind of gas-shielded welder.
Background technology
Gas-shielded welder (cogas protective welder) is without welding rod welding wire, with CO2, CO2 and argon gas gaseous mixture
Body, CO2 and helium mix gas do the parts such as protective gas, including power supply, wire feeding motor, and gas shield welding welding current is exportable
Rectangular pulse waveform, reaches spray transfer, it is easy to all-position welding.Direct current gas-shielded welder electric current transition regime is AC-DC-AC-
DC.Crawl wire feed is that before being welded in gas shield welding, welding wire is quickly sent to a kind of feeding method of welding gun mouthful by wire feed rolls.It is existing
Some crawl wire feed implementations have two kinds：
The first is as shown in figure 1, outside the major loop of welding machine, separately one power of increase is about 150W control transformer
Make wire feed electromechanical source, will be powered after industrial 380V normal voltages transformation for wire feeding motor, crawl wire feed process can be with welding machine master
Loop is completely separable individually operated.This kind of crawl wire feeding mode has advantages below：(1) when crawl wire feed, major loop
Do not export, can effectively prevent welding wire and workpiece Contact from producing adhesion；(2), can be by gas when crawl wire feed
Closing avoids wasting gas；(3) without specially adjusting wire feed rate when crawl wire feed and normal weld mutually switch.But this kind
Wire feeding mode, due to needing extra increase by one to control transformer, cost is higher.
Second as shown in Fig. 2 direct one assists winding of increase on welding machine main transformer, the assists winding is used as sending
Silk electromechanical source.Because general gas flow protection weldering output power of power supply is all in more than 5KW, and wire feed acc power only has 150W or so,
So the assists winding is used as wire feed electromechanical source and almost main transformer is not influenceed, the welding machine major loop during crawl wire feed
Equally there is output.This kind of crawl wire feeding mode, wire-feed motor is without individually addition control transformer, and cost is relatively low, but exists following
Shortcoming：(1) due to during wire feed major loop have output, may make welding wire and workpiece adhesion after welding wire contact workpiece；(2) point
Gas waste can be produced during dynamic wire feed；(3) due to it is generally desirable to crawl wire feed rate faster, so crawl wire feed and normal
Welding needs specially to adjust wire feed rate.
Utility model content
Technical problem to be solved in the utility model is to provide a kind of gas-shielded welder, can not be additionally wire feeding motor
Ensure on the premise of increasing power supply wire feeding motor can quick smooth wire feed, when can preventing that welding wire and workpiece from contacing by mistake again
Stick together.
In order to solve the above technical problems, the utility model provide gas-shielded welder, it include control circuit, inverter circuit,
Main transformer, welding machine rectification circuit, welding machine arc electrode, rectification speed governing current circuit, wire feeding motor, current feedback circuit；
The inverter circuit, input termination DC voltage, output end output rectangular pulse waveform to main transformer primary around
Group；
The output welder rectification circuit of main transformer welding machine secondary windings；
The output welder arc electrodes of welding machine rectification circuit；
The output of main transformer auxiliary secondary winding connects rectification alignment circuit；
The output of rectification alignment circuit connects wire feeding motor；
The current feedback circuit, the electric current for gathering welding machine arc electrode；
The control circuit, in crawl wire feed state, it is welding machine arc electrode and rectification speed governing electricity to control inverter circuit
Road powers, and controls the output of rectification alignment circuit to make the rotating speed of wire feeding motor be crawl wire feed rotating speed；
The control circuit, in welded condition, it is that welding machine arc electrode and rectification alignment circuit are supplied to control inverter circuit
Electricity, and control the output of speed governing rectification circuit to make the rotating speed of wire feeding motor be welding wire feed rotating speed；
The control circuit, in crawl wire feed state, if the electric current of welding machine arc electrode is more than setting value, enters
False touch guard mode, it is that welding machine arc electrode and rectification alignment circuit are powered to control inverter circuit to stop.
Preferably, the control circuit, controls air valve to close, makes welding gun in crawl wire feed state and false touch guard mode
Nozzle stops spray protection gas；Air valve conducting is controlled in welded condition, makes torch neck spray protection gas.
Preferably, the gas-shielded welder also includes current rectifying and wave filtering circuit；
The entire filter wave circuit input termination electric main, output DC voltage to the inverter circuit.
Preferably, the gas-shielded welder also includes switching switch, machine initial arc switch；
When switching switch is first state, the control circuit enters crawl wire feed state；
When switching switch is the second state and machine initial arc switch closure, into welded condition.
Preferably, when switching switch is the second state and disconnected machine initial arc switch, the control circuit enters welding
Readiness.
Preferably, the control circuit, when welding readiness, it is welding machine arc electrode and rectification to control inverter circuit
Alignment circuit is powered, and controls speed governing rectification circuit to stop powering for wire feeding motor.
Preferably, the control circuit, in welded condition, if machine initial arc is switched off, enters welding preparation
State.
Preferably, the control circuit, when welding readiness, control torch neck stops spray protection gas.
Preferably, gas-shielded welder also includes braking circuit；
The control circuit, controls the braking circuit to connect wire feeding motor when entering false touch guard mode.
Preferably, welding wire feed rotating speed is less than crawl wire feed rotating speed；
Gas-shielded welder of the present utility model, one auxiliary secondary winding of addition is used as wire feeding motor in main transformer is secondary
Power supply, and increase by a current feedback circuit for gathering welding machine arc electrode current.In crawl wire feed state, control circuit control
The output of speed governing rectification circuit makes the crawl wire feed rotating speed that the rotating speed of wire feeding motor is high speed；In welded condition, circuit control is controlled
Rectification alignment circuit output processed makes the welding wire feed rotating speed that the rotating speed of wire feeding motor is low speed；In crawl wire feed state, if
The electric current of welding machine arc electrode is more than setting value, then into false touch guard mode, controls inverter circuit to stop for welding machine arc electricity
Pole and speed governing rectification circuit are powered, and welding machine secondary windings and auxiliary secondary winding are powered off simultaneously, and welding machine arc electrode is without electricity, wire feed
Motor stalls, crawl wire feed terminates.Gas-shielded welder of the present utility model, under crawl wire feed state, control circuit is sent
The pwm signal of suitable duty ratio gives rectification alignment circuit, controls the quick wire feed of wire feeding motor；The wink contacted when welding wire and workpiece
Between, welding machine arc electrode has electric current to flow through, because the size of current of current feedback signal and welding machine arc electrode is proportional,
When welding machine arc electrode has larger current output under crawl wire feed state, control circuit judges crawl wire feed during welding wire and
Workpiece is contactd by mistake, automatically into false touch guard mode, and it is welding machine arc electrode and speed governing rectification to control inverter circuit to stop
Circuit is powered, so as to can ensure that wire feeding motor quickly can smoothly be sent on the premise of additionally power supply is not increased for wire feeding motor
Silk, sticks together when can preventing welding wire and workpiece from contacing by mistake again.
Brief description of the drawings
Fig. 1 is a kind of crawl wire feed implementation schematic diagram of existing gas-shielded welder；
Fig. 2 is another crawl wire feed implementation schematic diagram of existing gas-shielded welder；
Fig. 3 is the embodiment schematic diagram of gas-shielded welder one of the present utility model.
Embodiment
Clear complete description is carried out to the technical scheme in the utility model below in conjunction with accompanying drawing, it is clear that described
Embodiment be a part of embodiment of the present utility model, rather than whole embodiment.Based on the implementation in the utility model
Example, all other embodiment that those skilled in the art is obtained on the premise of creative work is not made belongs to this
The scope of utility model protection.
Embodiment one
As shown in figure 3, gas-shielded welder includes control circuit, inverter circuit, main transformer, welding machine rectification circuit, welding machine electricity
Arc electrode, rectification alignment circuit, wire feeding motor, current feedback circuit；
The inverter circuit, input termination DC voltage, output end output rectangular pulse waveform to main transformer primary around
Group；
The output welder rectification circuit of main transformer welding machine secondary windings；
The output welder arc electrodes of welding machine rectification circuit；
The output of main transformer auxiliary secondary winding connects rectification alignment circuit；
The output of speed governing rectification circuit connects wire feeding motor；
The current feedback circuit, the electric current for gathering welding machine arc electrode；
The control circuit, in crawl wire feed state, it is welding machine arc electrode and speed governing rectified current to control inverter circuit
Road powers, and controls the output of rectification alignment circuit to make the rotating speed of wire feeding motor be crawl wire feed rotating speed；
The control circuit, in welded condition, it is that welding machine arc electrode and rectification alignment circuit are supplied to control inverter circuit
Electricity, and control the output of rectification alignment circuit to make the rotating speed of wire feeding motor be welding wire feed rotating speed；
The control circuit, in crawl wire feed state, if the electric current of welding machine arc electrode is more than setting value, enters
False touch guard mode, it is that welding machine arc electrode and rectification alignment circuit are powered to control inverter circuit to stop.
Preferably, the control circuit, controls air valve to close, makes welding gun in crawl wire feed state and false touch guard mode
Nozzle stops spray protection gas；Air valve conducting is controlled in welded condition, makes torch neck spray protection gas.
Preferably, the gas-shielded welder also includes current rectifying and wave filtering circuit；
The entire filter wave circuit input termination electric main, output DC voltage to the inverter circuit.
Preferably, welding wire feed rotating speed is less than crawl wire feed rotating speed.
The gas-shielded welder of embodiment one, one auxiliary secondary winding of addition is used as wire feeding motor electricity in main transformer is secondary
Source, and increase by a current feedback circuit for gathering welding machine arc electrode current.In crawl wire feed state, control circuit control is whole
Stream alignment circuit output makes the crawl wire feed rotating speed that the rotating speed of wire feeding motor is high speed；In welded condition, control circuit control
The output of speed governing rectification circuit makes the welding wire feed rotating speed that the rotating speed of wire feeding motor is low speed；In crawl wire feed state, if weldering
The electric current of machine arc electrodes is more than setting value, then into false touch guard mode, and it is welding machine arc electrode to control inverter circuit to stop
And rectification alignment circuit is powered, welding machine secondary windings and auxiliary secondary winding are powered off simultaneously, and welding machine arc electrode is without electricity, wire feed electricity
Machine stops operating, and crawl wire feed terminates.
The gas-shielded welder of embodiment one, under crawl wire feed state, control circuit send suitable duty ratio pwm signal to
Rectification alignment circuit, controls the quick wire feed of wire feeding motor；When the moment that welding wire and workpiece are contacted, welding machine arc electrode has electric current stream
Cross, because the size of current of current feedback signal and welding machine arc electrode is proportional, when welding machine electricity under crawl wire feed state
When arc electrode has larger current output, welding wire and workpiece are contactd by mistake during control circuit judges crawl wire feed, are entered automatically
Enter false touch guard mode, it is that welding machine arc electrode and rectification alignment circuit are powered to control inverter circuit to stop, so that can be not
Additionally for wire feeding motor increase power supply on the premise of ensure wire feeding motor can quick smooth wire feed, welding wire and work can be prevented again
Sticked together when part is contactd by mistake.
Embodiment two
Based on embodiment one, the gas-shielded welder also includes switching switch, machine initial arc switch；
When switching switch is first state, the control circuit enters crawl wire feed state；
When switching switch is the second state and machine initial arc switch closure, into welded condition.
Preferably, when switching switch is the second state and disconnected machine initial arc switch, the control circuit enters welding
Readiness.
Preferably, the control circuit, when welding readiness, it is welding machine arc electrode and rectification to control inverter circuit
Alignment circuit is powered, and controls rectification alignment circuit to stop powering for wire feeding motor.
Preferably, the control circuit, in welded condition, if machine initial arc is switched off, enters welding preparation
State.
Preferably, the control circuit, when welding readiness, control torch neck stops jet.
The gas-shielded welder of embodiment two, the opening and closing switched by switching switch, machine initial arc makes control circuit enter crawl
Wire feed state, welded condition or welding readiness, both can guarantee that crawl wire feed and normal weld were independent of each other, and can prevent again
Welding wire and workpiece stick together when contacing by mistake.
Embodiment three
Based on embodiment one, gas-shielded welder also includes braking circuit；
The control circuit, controls the braking circuit to connect wire feeding motor when entering false touch guard mode.
The crawl wire feeder of embodiment three, controls the braking circuit to connect wire feed electricity when entering false touch guard mode
Machine, makes wire feeding motor quickly stop operating.
Preferred embodiment of the present utility model is the foregoing is only, it is all at this not to limit the utility model
Within the spirit and principle of utility model, any modification, equivalent substitution and improvements done etc. should be included in the utility model
Within the scope of protection.
Claims (10)
1. a kind of gas-shielded welder, it is characterised in that including control circuit, inverter circuit, main transformer, welding machine rectification circuit, weldering
Machine arc electrodes, rectification alignment circuit, wire feeding motor, current feedback circuit；
The inverter circuit, input termination DC voltage, output end exports rectangular pulse waveform to main transformer armature winding；
The output welder rectification circuit of main transformer welding machine secondary windings；
The output welder arc electrodes of welding machine rectification circuit；
The output of main transformer auxiliary secondary winding connects rectification alignment circuit；
The output of rectification alignment circuit connects wire feeding motor；
The current feedback circuit, for gathering the current signal of welding machine arc electrode and being sent to the control circuit.
2. gas-shielded welder according to claim 1, it is characterised in that
The gas-shielded welder also includes switching switch, machine initial arc switch；
When switching switch is first state, the control circuit enters crawl wire feed state；
When switching switch is the second state and machine initial arc switch closure, into welded condition.
3. gas-shielded welder according to claim 2, it is characterised in that
When switching switch is the second state and disconnected machine initial arc switch, the control circuit enters welding readiness.
4. gas-shielded welder according to claim 3, it is characterised in that
The control circuit, when welding readiness, it is that welding machine arc electrode and speed governing rectification circuit are supplied to control inverter circuit
Electricity, and control speed governing rectification circuit to stop powering for wire feeding motor.
5. gas-shielded welder according to claim 2, it is characterised in that
The control circuit, in welded condition, if machine initial arc is switched off, enters welding readiness.
6. the gas-shielded welder according to claim 3 or 5, it is characterised in that
The control circuit, when welding readiness, control torch neck stops spray protection gas.
7. gas-shielded welder according to claim 2, it is characterised in that
The control circuit, in crawl wire feed state, it is that welding machine arc electrode and rectification alignment circuit are supplied to control inverter circuit
Electricity, and control the output of rectification alignment circuit to make the rotating speed of wire feeding motor be crawl wire feed rotating speed；
The control circuit, in welded condition, it is that welding machine arc electrode and rectification alignment circuit are powered to control inverter circuit, and
The output of rectification alignment circuit is controlled to make the rotating speed of wire feeding motor be welding wire feed rotating speed；
The control circuit, in crawl wire feed state, if the electric current of welding machine arc electrode is more than setting value, into false touch
Guard mode, it is that welding machine arc electrode and rectification alignment circuit are powered to control inverter circuit to stop.
8. gas-shielded welder according to claim 7, it is characterised in that
Gas-shielded welder also includes braking circuit；
The control circuit, controls the braking circuit to connect wire feeding motor when entering false touch guard mode.
9. gas-shielded welder according to claim 7, it is characterised in that
Weld wire feed rotating speed and be less than crawl wire feed rotating speed.
10. gas-shielded welder according to claim 7, it is characterised in that
The control circuit, controls air valve to close in crawl wire feed state and false touch guard mode, torch neck is stopped spray
Protect gas；Air valve conducting is controlled in welded condition, makes torch neck spray protection gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621470564.2U CN206464675U (en) | 2016-12-29 | 2016-12-29 | Gas-shielded welder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621470564.2U CN206464675U (en) | 2016-12-29 | 2016-12-29 | Gas-shielded welder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206464675U true CN206464675U (en) | 2017-09-05 |
Family
ID=59712383
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621470564.2U Active CN206464675U (en) | 2016-12-29 | 2016-12-29 | Gas-shielded welder |
Country Status (1)
| Country | Link |
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| CN (1) | CN206464675U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106735746A (en) * | 2016-12-29 | 2017-05-31 | 上海通用重工集团有限公司 | Gas-shielded welder |
| CN109202217A (en) * | 2018-09-28 | 2019-01-15 | 上海通用重工集团有限公司 | Convenient for the gas-shielded welder of the starting the arc |
-
2016
- 2016-12-29 CN CN201621470564.2U patent/CN206464675U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106735746A (en) * | 2016-12-29 | 2017-05-31 | 上海通用重工集团有限公司 | Gas-shielded welder |
| CN109202217A (en) * | 2018-09-28 | 2019-01-15 | 上海通用重工集团有限公司 | Convenient for the gas-shielded welder of the starting the arc |
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