CN108296604A - Constant power control device for welding machine - Google Patents
Constant power control device for welding machine Download PDFInfo
- Publication number
- CN108296604A CN108296604A CN201810200406.2A CN201810200406A CN108296604A CN 108296604 A CN108296604 A CN 108296604A CN 201810200406 A CN201810200406 A CN 201810200406A CN 108296604 A CN108296604 A CN 108296604A
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- 238000003466 welding Methods 0.000 title claims abstract description 70
- 230000001934 delay Effects 0.000 claims abstract description 29
- 230000005611 electricity Effects 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 12
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 230000003078 antioxidant effect Effects 0.000 description 1
- 235000006708 antioxidants Nutrition 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/095—Monitoring or automatic control of welding parameters
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/10—Other electric circuits therefor; Protective circuits; Remote controls
- B23K9/1006—Power supply
- B23K9/1043—Power supply characterised by the electric circuit
Abstract
The present invention discloses a kind of constant power control device for welding machine, including：Power limitation control unit, the power limitation control unit export a voltage according to panel Setting signal, arc voltage feedback signal and reference signal；Voltage delays time to control unit, the voltage delays time to control unit is according to the polarity on or off of the voltage；Current regulation unit, the current regulation unit control the load current of the welding machine when the voltage delays time to control unit is connected according to the voltage value.
Description
Technical field
The present invention relates to welding machine technical fields, more particularly to are used for the constant power control device of welding machine.
Background technology
The inflammable and explosive energy such as transporting petroleum, natural gas in underground piping in the prior art, the welding of transport pipeline
It asks very high and needs corrosion resistant, common welding rod cannot be satisfied requirement.The disadvantage of common welding rod maximum is not anti-oxidant.Therefore
It can be aoxidized after the weld seam through a long time use of common welding rod, intensity declines.The problems such as pipe leakage being be easy to cause after weld seam oxidation,
There is huge security risk.In the prior art in order to avoid pipe leakage, need safeguard pipeline, therefore can improve
The management of underground piping and operation cost.
Common welding rod is not suitable for the welding of transport pipeline, so needing to carry out pipeline weldering using special Cellulose-Congo red medium
It connects, to prevent weld from aoxidizing.Currently, mostly using Cellulose-Congo red medium back cover greatly in pipeline construction, Cellulose-Congo red medium is being used
There is the features such as fusion penetration is big, penetration power is strong, one side welding with back formation, and stomata sensitivity is small when vertical downward welds, be suitable for heavy wall
The backing welding of container and steel pipe bottom.
Cellulose-Congo red medium is compared with common welding rod, needs higher load voltage to stablize welding.Cellulose-Congo red medium diameter
Difference also has different requirements to welding size of current.Simply whole fan-out capability is increased when if designing welding machine electric power,
Cost can be increased, and welder equipment overall weight can be caused to increase.If power limitation control can be realized in welding machine, just
It can meet under the premise used if adjust automatically load exports when using other high current welding rods, while reducing first device
Part is born and consumption.
Invention content
In view of this, the present invention provides a kind of constant power control device for welding machine, it can be according to the change of welding current
Change adjust automatically load current and maintains power invariability to ensure the stability of welding.
In order to achieve the above-mentioned object of the invention, the present invention discloses a kind of constant power control device for welding machine, including：Permanent work(
Rate control unit, the power limitation control unit is according to one electricity of panel Setting signal, arc voltage feedback signal and reference signal output
Pressure；Voltage delays time to control unit, the voltage delays time to control unit is according to the polarity on or off of the voltage；Current regulation list
Member, the current regulation unit control the load current of the welding machine when the voltage delays time to control unit is connected according to the voltage value.
Further, which compares panel Setting signal, arc voltage feedback signal and reference signal
Positive voltage signal or negative voltage signal are exported afterwards.
Further, which includes operational amplifier U9B, U9C and U9D, resistance R64, R61,
The anode connection arc voltage feedback signal of R65 and R69, operational amplifier U9B, cathode are connect with output end and resistance R64；It should
The anode connection panel Setting signal of operational amplifier U9C, cathode are connect with output end and resistance R61；One end of resistance R55
Connect the reference signal other end connection resistance R61, R64, R65；The cathode of operational amplifier U9D connects R65, anode connection
R69, output end connect voltage delays time to control unit；The other end of resistance R69 is grounded.
Further, which is -15V voltages.
Further, which includes capacitance and diode, which controls for realizing delay
System, the voltage are timing, and the diode current flow, when which is negative, which turns off.
Further, which includes capacitance C33, resistance R68 and diode D26, the capacitance
The cathode of operational amplifier U9D is connect with one end of resistance R69, the other end connects the output end of the operational amplifier, this two
The one end pole pipe D25 connects the output end and capacitance C33, resistance R68 of operational amplifier U9D.
Further, which includes variable resistance W1 and operational amplifier U3A, U3B, this can power transformation
The anode of the movable plate pin of resistance and operational amplifier U3A are connect, the stator pin of the variable resistance respectively with the operation amplifier
The cathode and output end of device U3B connects.
Further, which further includes capacitance C4, zener diode ZD3, capacitance C4 and voltage stabilizing two
Pole pipe ZD3 is in parallel, and one end connects the voltage delays time to control unit, and the other end connects the output end of operational amplifier U3B.
Further, the panel Setting signal after resistance R2, R15 partial pressure by obtaining, one end connection weldering of resistance R2
The machine side plate other end connects resistance R15 and power limitation control unit, the other end ground connection of resistance R15.
Further, which is acquired by arc voltage feedback unit, which includes resistance
R13, R8, R11, capacitance C7, C8, C5 and optocoupler U2, resistance R13 and R11 are separately connected executed arc voltage feedback input Wvin's
Pin, the one end resistance C8 connect resistance R13, R8 and capacitance C7, and the other end connects the other end of resistance R11 and C7, the resistance
The input terminal of the other end connection optocoupler U2 of R8, the output end of optocoupler U2 connect Vcc and capacitance C5, the other end of capacitance C5
Ground connection.
Compared with prior art, provided by the present invention for the constant power control device of welding machine by detecting arc voltage feedback
Voltage back can obtain the bonding power of welding machine at this time in conjunction with the welding current that welding machine is present.When welder electric current becomes
When change, welding machine adjust automatically load voltage ensures that bonding power is constant, can not only meet the welding requirements of Cellulose-Congo red medium, but also
Improve the stability of welding.
Description of the drawings
Attached drawing does not constitute inappropriate limitation of the present invention for more fully understanding the present invention.Wherein：
Fig. 1 is the functional block diagram of the constant power control device provided by the present invention for welding machine；
Fig. 2 is the hardware elementary diagram of welding machine provided by the present invention；
Fig. 3 is the hardware elementary diagram of the panel signal gathering unit of constant power control device provided by the present invention；
Fig. 4 is the hardware elementary diagram of the arc voltage feedback signal collecting unit of constant power control device provided by the present invention；
Fig. 5 is the power limitation control unit and voltage delays time to control unit of constant power control device provided by the present invention
Hardware elementary diagram；
Fig. 6 is the hardware elementary diagram of the current regulation unit of constant power control device provided by the present invention.
Specific implementation mode
Core of the invention thought is to provide a kind of welding machine being suitable for weld Cellulose-Congo red medium, which has perseverance work(
Rate control device can obtain welding machine at this time by detecting the voltage that arc voltage is fed back in conjunction with the welding current that welding machine is present
Bonding power.When welder curent change, welding machine adjust automatically load voltage ensures that bonding power is constant, both can be with
Meet the welding requirements of Cellulose-Congo red medium, and improves the stability of welding.
To keep the purpose of the present invention, advantages and features clearer, below in conjunction with 1~6 pair of perseverance proposed by the present invention of attached drawing
Power control device is described in further detail.It should be noted that attached drawing is all made of very simplified form and uses non-essence
Accurate ratio, only for the purpose of facilitating and clarifying the purpose of the embodiments of the invention.
As used in this specification, singulative "a", "an" and "the" includes plural reference, unless interior
In addition appearance explicitly points out outer.It is as used in this specification, term "or" be typically with the meaning including "and/or" and into
Enforcement, in addition in addition non-content explicitly points out.
As shown in Figure 1, Fig. 1 is the functional block diagram of the constant power control device provided by the present invention for welding machine.It should
Welding machine has constant power control device,, can be in conjunction with the welding current that welding machine is present by detecting the voltage that feeds back of arc voltage
Obtain the bonding power of welding machine at this time.When welder curent change, welding machine adjust automatically load voltage come ensure weld work(
Rate is constant, can not only meet the welding requirements of Cellulose-Congo red medium, but also improves the stability of welding.Specifically, the invariable power control
Device processed includes power limitation control unit 40, and the power limitation control unit 40 is according to panel Setting signal 10, arc voltage feedback signal
20 and reference signal 30 after output voltage；Voltage delays time to control unit 50, the voltage delays time to control unit 50 is according to the voltage
The polarity on or off of signal；Current regulation unit 60, the current regulation unit 60 are led in the voltage delays time to control unit 50
The load current of the welding machine is controlled when logical according to the voltage signal.Preferably, which further includes that PI (accumulate by ratio
Point) adjust unit.
The structure of the constant power control device is illustrated below with reference to Fig. 2-6 and how to ensure that bonding power is steady
It is fixed.
Fig. 2 is the hardware elementary diagram of welding machine provided by the present invention, in addition to being described including institute's emphasis of the present invention in the figure
Constant power control device further includes the original hardware circuit of welding machine, because the partial circuit is not that emphasis of the invention is not therefore another
One statement.As shown in Fig. 2, panel Setting signal MET, arc voltage feedback signal ARC follow circuit institute by operational amplifier respectively
Obtained value is overlapped with reference signal again, the signal input operational amplifier after superposition, through overvoltage delays time to control unit
After obtain confine signals.Confine signals are exactly power limitation control signal.Subsequent current adjusts unit and is believed by confine
Number variation control welding machine load current rise or fall, to achieve the purpose that welding machine power limitation control.
Fig. 3 is the hardware elementary diagram of the panel signal gathering unit of constant power control device provided by the present invention.Such as Fig. 3
The shown panel signal gathering unit passes through R2 and R15 resistance for acquiring panel given voltage MET, panel given voltage MET
Partial pressure obtains a voltage value, No. 10 feet (electrode input end) of input operational amplifier U9C.SP signals in Fig. 3 are overheats
Or overcurrent protection signal, T/M are manual welding or argon arc welding selection signal, only panel given voltage MET is just and power limitation control
Device is related.
Fig. 4 is the hardware elementary diagram of the arc voltage feedback signal collecting unit of constant power control device provided by the present invention.
WVIN reads the arc voltage feedback (ARC) of welding machine, and obtained voltage participates in panel given voltage MET's after following circuit U 9B
Superposition is compared.As shown in figure 4, the arc voltage feedback signal is acquired by arc voltage feedback unit, which includes resistance
R13, R8, R11, capacitance C7, C8, C5 and optocoupler U2, resistance R13 and R11 are separately connected the pin of Wvin, resistance C8 mono-
End connection resistance R13, R8 and capacitance C7, the other end connect the other end of resistance R11 and C7, the other end connection of resistance R8
The output end of the input terminal of optocoupler U2, optocoupler U2 connects Vcc and capacitance C5, the other end ground connection of capacitance C5.
Reference signal employed in the present invention is the voltage signal of negative 15V, and -15V voltages participate in after resistance R55
The superposition of voltage.Three arc voltage feedback voltage ARC, panel given voltage MET, -15V reference voltages voltage participations are compared.When than
When voltage after relatively is positive voltage, voltage is through overvoltage delays time to control unit, diode D26 conductings, confine signals input electricity
Stream adjusts circuit, and constant-power control circuit is started to work, and adjusts the output power of welding machine to maintain power invariability.After comparison
When voltage is negative voltage, voltage is not turned on through overvoltage delays time to control unit, diode D26, confine signals not input current
Circuit is adjusted, constant-power control circuit does not work, welding machine normal weld.
Fig. 5 is the hardware elementary diagram of power limitation control unit and voltage delays time to control unit provided by the present invention.Such as
Shown in Fig. 5, which exports positive voltage after comparing panel Setting signal, arc voltage feedback signal and reference signal
Signal or negative voltage signal.Comparison result, which is positive voltage, causes power limitation control cell operation, comparison result to cause for negative voltage
Power limitation control unit does not work.
The power limitation control unit includes operational amplifier U9B, U9C and U9D, resistance R64, R61, R65 and R69,
The anode connection arc voltage feedback signal of operational amplifier U9B, cathode are connect with output end and resistance R64；The operational amplifier
The anode connection panel Setting signal of U9C, cathode are connect with output end and resistance R61；One end linker definite message or answer of resistance R55
Number other end connection resistance R61, R64, R65；The cathode of operational amplifier U9D connects R65, anode connection R69, output end
Connect voltage delays time to control unit；The other end of resistance R69 is grounded.
The voltage delays time to control unit includes capacitance and diode, which is for realizing delays time to control, the voltage
Timing, the diode current flow, when which is negative, diode shutdown.The voltage delays time to control unit includes capacitance C33, electricity
R68 and diode D26 is hindered, which connect the cathode of operational amplifier U9D, other end connection with one end of resistance R69
The output end of the operational amplifier, the one end diode D25 connect operational amplifier U9D output end and capacitance C33,
Resistance R68.
Fig. 6 is the hardware elementary diagram of the current regulation unit of constant power control device provided by the present invention.Such as Fig. 6 institutes
Show, current regulation unit using the change in resistance of variable resistance to make the value of operational amplifier electrode input end change,
And then the load current for controlling welding machine rises or falls.Specifically, which includes variable resistance W1 and operation
Amplifier U3A, U3B, the movable plate pin of the variable resistance are connect with the anode of operational amplifier U3A, which determines
Piece pin is connect with the cathode of operational amplifier U3B and output end respectively.The current regulation unit further include capacitance C4,
Zener diode ZD3, capacitance C4 is in parallel with zener diode ZD3, and one end connects the voltage delays time to control unit, and the other end connects
Connect the output end of operational amplifier U3B.
Compared with prior art, provided by the present invention for the constant power control device of welding machine by detecting arc voltage feedback
Voltage back can obtain the bonding power of welding machine at this time in conjunction with the welding current that welding machine is present.When welder electric current becomes
When change, welding machine adjust automatically load voltage ensures that bonding power is constant, can not only meet the welding requirements of Cellulose-Congo red medium, but also
Improve the stability of welding.
Foregoing description is only the description to present pre-ferred embodiments, not to any restriction of the scope of the invention, this hair
Any change, the modification that the those of ordinary skill in bright field does according to the disclosure above content, belong to the protection of claims
Range.
Claims (10)
1. a kind of constant power control device for welding machine, which is characterized in that including：
Power limitation control unit, the power limitation control unit are believed according to panel Setting signal, arc voltage feedback signal and benchmark
Number output voltage signal；
Voltage delays time to control unit, the voltage delays time to control unit is according to the polarity on or off of the voltage signal；
Current regulation unit, the current regulation unit is when the voltage delays time to control unit is connected according to the voltage signal
Control the load current of the welding machine.
2. constant power control device as described in claim 1, which is characterized in that the power limitation control unit compare panel to
Positive voltage signal or negative voltage signal are exported after determining signal, arc voltage feedback signal and reference signal.
3. constant power control device as described in claim 1, which is characterized in that the power limitation control unit includes that operation is put
Big device U9B, U9C and U9D, resistance R64, R61, R65 and R69, the anode connection arc voltage feedback of the operational amplifier U9B
Signal, cathode are connect with output end and resistance R64；The operational amplifier U9C anode connection panel Setting signal, cathode with
Output end is connected with resistance R61；One end connection reference signal other end connection resistance R61, R64, R65 of the resistance R55；Institute
The cathode connection R65 of operational amplifier U9D, anode connection R69 are stated, output end connects voltage delays time to control unit；The resistance
The other end of R69 is grounded.
4. constant power control device as described in claim 1, which is characterized in that the reference signal is -15V voltage signals.
5. constant power control device as described in claim 1, which is characterized in that the voltage delays time to control unit includes capacitance
And diode, for the capacitance for realizing delays time to control, the voltage signal is timing, the diode current flow, the electricity
It is diode shutdown when bearing to press signal.
6. constant power control device as claimed in claim 3, which is characterized in that the voltage delays time to control unit includes capacitance
C33, resistance R68 and diode D26, the capacitance connect the cathode of the operational amplifier U9D with one end of resistance R69,
The other end connects the output end of the operational amplifier, and the one end the diode D25 connects the output of the operational amplifier U9D
End and capacitance C33, resistance R68.
7. constant power control device as described in claim 1, which is characterized in that the current regulation unit includes variable resistance
W1 and operational amplifier U3A, U3B, the movable plate pin of the variable resistance are connect with the anode of the operational amplifier U3A,
The stator pin of the variable resistance is connect with the cathode of the operational amplifier U3B and output end respectively.
8. constant power control device as claimed in claim 7, which is characterized in that the current regulation unit further includes capacitance
C4, zener diode ZD3, the capacitance C4 is in parallel with zener diode ZD3, and one end connects the voltage delays time to control unit,
The other end connects the output end of the operational amplifier U3B.
9. constant power control device as described in claim 1, which is characterized in that the panel Setting signal is by resistance R2, R15
It is obtained after partial pressure, one end connection welding machine panel other end connection resistance R15 and power limitation control unit of the resistance R2, institute
State the other end ground connection of resistance R15.
10. constant power control device as described in claim 1, which is characterized in that the arc voltage feedback signal is fed back by arc voltage
Unit acquires, and the arc voltage feedback unit includes resistance R13, R8, R11, capacitance C7, C8, C5 and optocoupler U2, the resistance R13
It is separately connected the pin that executed arc voltage feedback inputs Wvin with R11, the one end the resistance C8 connects resistance R13, R8 and capacitance C7,
The other end connects the other end of resistance R11 and C7, the input terminal of the other end connection optocoupler U2 of the resistance R8, the optocoupler U2
Output end connection Vcc and capacitance C5, the capacitance C5 the other end ground connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810200406.2A CN108296604B (en) | 2018-03-12 | 2018-03-12 | Constant power control device for welding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810200406.2A CN108296604B (en) | 2018-03-12 | 2018-03-12 | Constant power control device for welding machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108296604A true CN108296604A (en) | 2018-07-20 |
| CN108296604B CN108296604B (en) | 2023-12-12 |
Family
ID=62849655
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810200406.2A Active CN108296604B (en) | 2018-03-12 | 2018-03-12 | Constant power control device for welding machine |
Country Status (1)
| Country | Link |
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|---|---|---|---|---|
| US3391322A (en) * | 1965-11-30 | 1968-07-02 | Atomic Energy Commission Usa | Constant power regulator with variable voltage boost |
| CN1380157A (en) * | 2001-04-09 | 2002-11-20 | 林肯环球公司 | System and method for controlling electric-arc welding machine |
| KR20040056238A (en) * | 2002-12-23 | 2004-06-30 | 주식회사 포스코 | constant power controlling device and method for resistance welder |
| CN102522902A (en) * | 2011-12-23 | 2012-06-27 | 杨云柳 | Consistent-harmonic oscillation type switching power supply |
| CN204119072U (en) * | 2014-11-11 | 2015-01-21 | 河北工程技术高等专科学校 | The two PWM source of welding current of Direct Current Control |
| CN105562888A (en) * | 2016-01-27 | 2016-05-11 | 上海广为焊接设备有限公司 | Welding machine rated power limitation system based on dual PI inhibition |
| CN106956061A (en) * | 2017-04-25 | 2017-07-18 | 南通市慧冠智能科技有限公司 | Source of welding current power output changes acts closed loop control method with arc welding robot |
| CN107052525A (en) * | 2017-04-22 | 2017-08-18 | 河北亚峰专用汽车制造有限公司 | A kind of welding equipment of the constant welding method of bonding power and application this method |
| CN207952887U (en) * | 2018-03-12 | 2018-10-12 | 上海威特力焊接设备制造股份有限公司 | Constant power control device for welding machine |
-
2018
- 2018-03-12 CN CN201810200406.2A patent/CN108296604B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3391322A (en) * | 1965-11-30 | 1968-07-02 | Atomic Energy Commission Usa | Constant power regulator with variable voltage boost |
| CN1380157A (en) * | 2001-04-09 | 2002-11-20 | 林肯环球公司 | System and method for controlling electric-arc welding machine |
| KR20040056238A (en) * | 2002-12-23 | 2004-06-30 | 주식회사 포스코 | constant power controlling device and method for resistance welder |
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