CN105171190B - The intelligent detection device of manual welding machine arc voltage - Google Patents
The intelligent detection device of manual welding machine arc voltage Download PDFInfo
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- CN105171190B CN105171190B CN201510666569.6A CN201510666569A CN105171190B CN 105171190 B CN105171190 B CN 105171190B CN 201510666569 A CN201510666569 A CN 201510666569A CN 105171190 B CN105171190 B CN 105171190B
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- 238000003466 welding Methods 0.000 title claims abstract description 193
- 238000001514 detection method Methods 0.000 title claims abstract description 47
- 230000007704 transition Effects 0.000 claims description 22
- 238000000151 deposition Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 description 10
- 230000008569 process Effects 0.000 description 9
- 238000010891 electric arc Methods 0.000 description 8
- 230000005611 electricity Effects 0.000 description 8
- 230000008859 change Effects 0.000 description 3
- 238000011897 real-time detection Methods 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 230000003044 adaptive effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- 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
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Arc Welding Control (AREA)
Abstract
The invention discloses a kind of intelligent detection device of manual welding machine arc voltage, it includes current detection circuit, voltage detecting circuit, controller, the first register；Current detection circuit is used to detect the electric current in welding machine work output loop and export to controller；Voltage detecting circuit is used to detect the output voltage of welding machine electric power and exports to controller；First register is used to deposit manual welding machine output loop cable resistance；Controller is used to calculate and export manual welding machine arc voltage；U7=U1‑RH* I, U7It is manual welding machine arc voltage, U1It is the output voltage of welding machine electric power, I is the electric current in welding machine work output loop, RHIt is the manual welding machine output loop cable resistance in the first register.The intelligent detection device of manual welding machine arc voltage of the invention, can precisely in real time detect and obtain manual welding machine arc voltage.
Description
Technical field
The present invention relates to welding machine, particularly a kind of intelligent detection device of manual welding machine arc voltage.
Background technology
Manual welding machine work weld loop constitute as shown in figure 1, including welding machine electric power 1, welding cable 2, ground wire cable 3,
Electrode holders 4, welding rod 5, workpiece 7.
The external devices of manual welding machine work output loop are by welding cable 2, electrode holders 4, welding rod 5, workpiece 7, ground wire electricity
Cable 3 is constituted, and these external devices have resistance in itself, and the external devices resistance sum of welding machine work output loop is RH, RH=R2
+ R4+R5+R6+R3, R2 are the resistance of welding cable 2, and R4 is the resistance of electrode holders 4, and R5 is the resistance of welding rod 5, and R6 is the resistance of workpiece 7, R3
It is the resistance of ground wire cable 3.In manual welding machine work, welding machine electric power 1 provides welding arc 6 electric energy, and welding current is by welding
Cable 2, electrode holders 4, welding rod 5, workpiece 7, ground wire cable 3, electric current flow through each device and produce voltage respectively welding cable voltage
U2, electrode holders voltage U4, welding rod voltage U5, workpiece voltage U6, ground wire voltage cable U3, then welding machine work output loop outside device
The voltage sum U of partH=U2+U4+U5+U6+U3.If voltage is U on welding arc 67, then U7With welding machine output voltage U1Between
Relation is：U1=UH+U7。
At present, manual welding machine is all the output voltage U by sampling welding machine electric power1, controlled using Voltage Feedback mode
Electric arc.Due to when welding machine work output loop there is electric current to flow through when, the output voltage U of welding machine electric power1With voltage on welding arc 6
U7Have differences, electric arc can be caused to control inaccurate.
The phenomenon of output short-circuit occurs in welding process due to manual welding machine, in order to avoid caused by short circuit welding rod with
The adhesion phenomenon of workpiece occurs, and welding machine increased the functions such as thrust, hot striking, adhesive-proof strip when designing.These functions need butt welding
Machine short-circuit condition is detected, and short-circuit condition detection mode is sampling welding machine electric power output voltage U at present1Value, according to U1's
Size judged, that is, work as U1During less than lower voltage limit K values, welding machine judges output short-circuit.Due to the presence of welding current, welding
Voltage U is respectively present on cable 2 and ground wire cable 32, U3, because of the resistance R4 of electrode holders 4, the resistance R5 of welding rod 5 in reality and the electricity of workpiece 7
The equal very little of resistance of R6 is hindered, can be ignored, then U1≈U2+U3+U7.It is defeated with welding cable 2, the length of ground wire cable 3
Go out U in short-circuit process2+U3Value can be more than lower voltage limit K values, even if now U7=0V, U1Also greater than lower voltage limit K values, welding machine
None- identified short-circuit condition, causes part welding function to fail.
The content of the invention
The technical problem to be solved in the present invention is to provide a kind of intelligent detection device of manual welding machine arc voltage, can be real
When, accurately detect and obtain manual welding machine arc voltage.
In order to solve the above technical problems, the intelligent detection device of the manual welding machine arc voltage that the present invention is provided, it includes
Current detection circuit, voltage detecting circuit, controller, the first register；
The current detection circuit, for detecting the electric current in welding machine work output loop and exporting to the controller；
The voltage detecting circuit, for detecting the output voltage of welding machine electric power and exporting to the controller；
First register, for depositing manual welding machine output loop cable resistance；
The controller, for calculating and exports manual welding machine arc voltage；
U7=U1-RH* I, U7It is manual welding machine arc voltage, U1It is the output voltage of welding machine electric power, I is welding machine work output
Electric current in loop, RHIt is the manual welding machine output loop cable resistance in the first register.
Preferably, the intelligent detection device of the manual welding machine arc voltage, also including the second register；
The controller, for calculating and exports manual welding machine arc voltage to second register.
Preferably, the controller, when the output voltage of welding machine electric power produces transition from high to low, then calculates output welding machine
Power supply output loop resistance RHTo first register；RH=U1L/IL,U1LThe output electricity of the welding machine electric power at the end of for transition
Pressure, ILThe electric current in welding machine work output loop at the end of for transition.
If preferably, the output voltage of welding machine electric power is by operating voltage UOBecome less than the first threshold voltage K1, then welding machine
The output voltage of power supply produces transition from high to low, K1＜ UO*4/5。
Preferably, K1It is UO/2、UO/ 3 or UO/4。
If preferably, the differential value of the output voltage of welding machine electric power is less than -5000 volts/second, the output of welding machine electric power
Voltage produces transition from high to low.
Preferably, the controller, works as U7＜ K2,K2It is the second threshold voltage, K2≤K1, then control manual welding machine increase defeated
Go out electric current.
Preferably, the controller, works as U7Less than the 3rd threshold voltage K3Duration be more than setting time t, then control by hand
Welding machine reduces output current, K3≤K1。
Preferably, 0.3 second ＜ t ＜ 3.0 seconds.
Preferably, t is 0.7 second, 1 second or 2 seconds.
The intelligent detection device of manual welding machine arc voltage of the invention, can export back according to the work of the welding machine of Real-time Collection
The output voltage of electric current, welding machine electric power in road, precisely in real time detection obtains manual welding machine arc voltage.Hand of the invention
The intelligent detection device of work welding machine arc voltage, when change of external conditions, can obtain actual welding electric arc electricity with intellectual analysis
Pressure, because the manual welding machine arc voltage is in real time and accurate, can accurately control electric arc based on the manual welding machine arc voltage
Form, so that reduce arc shape during welder influenceed by external factor such as welding cable, earth cable, workpiece,
Improve the stability of welder process.
Brief description of the drawings
In order to illustrate more clearly of technical scheme, simple is made to the accompanying drawing used required for the present invention below
Introduce, it should be apparent that, drawings in the following description are only some embodiments of the present invention, for ordinary skill people
For member, on the premise of not paying creative work, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is manual welding machine work weld circuit diagram；
Fig. 2 is the example structure figure of intelligent detection device one of manual welding machine arc voltage of the invention.
Specific embodiment
Below in conjunction with accompanying drawing, clear, complete description is carried out to the technical scheme in the present invention, it is clear that described
Embodiment is a part of embodiment of the invention, rather than whole embodiments.Based on the embodiment in the present invention, this area is general
All other embodiment that logical technical staff is obtained on the premise of creative work is not made, belongs to protection of the present invention
Scope.
Embodiment one
The intelligent detection device of manual welding machine arc voltage, including current detection circuit, voltage detecting circuit, controller,
First register；
The current detection circuit, for detecting the electric current in welding machine work output loop and exporting to the controller；
The voltage detecting circuit, for detecting the output voltage of welding machine electric power and exporting to the controller；
First register, for depositing manual welding machine output loop cable resistance；
The controller, for calculating and exports manual welding machine arc voltage；
U7=U1-RH* I, U7It is manual welding machine arc voltage, U1It is the output voltage of welding machine electric power, I is welding machine work output
Electric current in loop, RHIt is the manual welding machine output loop cable resistance in the first register.
Preferably, the intelligent detection device of the manual welding machine arc voltage, also including the second register；
The controller, for calculating and exports manual welding machine arc voltage to second register.
According to manual welding machine output loop cable resistance RH, and the electric current I in welding machine work output loop, by UH=
RH* I, can calculate the voltage sum U of the external devices of welding machine work output loopH.By U7=U1-UH, can calculate
Manual welding machine arc voltage U7。
The intelligent detection device of the manual welding machine arc voltage of embodiment one, can work according to the welding machine of Real-time Collection and export
The output voltage of electric current, welding machine electric power in loop, precisely in real time detection obtains manual welding machine arc voltage.Embodiment one
Manual welding machine arc voltage intelligent detection device, when change of external conditions, can with intellectual analysis obtain actual welding electricity
Arc voltage, because the manual welding machine arc voltage is in real time and accurate, can be accurately controlled based on the manual welding machine arc voltage
Arc shape, so as to reduce shadow of the arc shape by external factor such as welding cable, earth cable, workpiece during welder
Ring, improve the stability of welder process.
Embodiment two
The intelligent detection device of the manual welding machine arc voltage based on embodiment one, the controller, when welding machine electric power
Output voltage produces transition from high to low, then calculate output welding machine electric power output loop resistance RHTo first register；RH=
U1L/IL,U1LThe output voltage of the welding machine electric power at the end of for transition, ILIn welding machine work output loop at the end of for transition
Electric current.
In machine initial arc process and welding process, the of short duration output short-circuit phenomenon of welding machine occurs, now electric arc electricity
Pressure U7L=0, the now output voltage generation of welding machine electric power can transition from high to low, the output electricity of the welding machine electric power at the end of transition
It is U to press1L, the voltage sum of the external devices of the welding machine work output loop at the end of transition is UHL, the welding machine at the end of transition
Electric current in work output loop is IL, due to U1L=U7L+UHL, U7L=0, so UHL=U1L, so RH=UHL/IL=U1L/
IL。
The intelligent detection device of the manual welding machine arc voltage of embodiment two, using in machine initial arc process and welding process
In, there is the welding machine actual output voltage U sampled in of short duration output short-circuit duration in welding machine1LWith short circuit current IL, calculate
Go out manual welding machine output loop cable resistance RH, and store in the first register.The manual welding machine arc voltage of embodiment two
Intelligent detection device, in machine initial arc process and welding process, can automatically calculate manual welding machine output loop cable
Resistance RHAnd update in register, energy is automatic, real-time, manual welding machine output loop cable resistance is updated exactly, so that can
Manual welding machine arc voltage is obtained to detect precisely in real time, is easy to precise control electric arc.
Embodiment three
The intelligent detection device of the manual welding machine arc voltage based on embodiment two, if the output voltage of welding machine electric power by
Operating voltage UOBecome less than the first threshold voltage K1, then the output voltage generation transition from high to low of welding machine electric power, K1＜ UO*
4/5, such as K1It is UO/2、UO/ 3 or UO/4。
The intelligent detection device of the manual welding machine arc voltage of embodiment three, when the output voltage of welding machine electric power is by work electricity
Pressure UOBecome less than the first threshold voltage K1, then controller be judged as welding machine electric power output voltage produce transition from high to low, root
According to the output voltage U of the welding machine electric power at the end of transition1L, start to calculate renewal welding machine electric power output loop resistance RH。
Example IV
The intelligent detection device of the manual welding machine arc voltage based on embodiment two, if the output voltage of welding machine electric power
Differential value is less than -5000 volts/second, then the output voltage of welding machine electric power produces transition from high to low.
The intelligent detection device of the manual welding machine arc voltage of example IV, when the output voltage differential value of welding machine electric power is small
In -5000 volts/second, then controller is judged as that the output voltage of welding machine electric power produces transition from high to low, at the end of transition
Welding machine electric power output voltage U1L, start to calculate renewal welding machine electric power output loop resistance RH。
Embodiment five
The intelligent detection device of the manual welding machine arc voltage based on embodiment one, the controller works as U7＜ K2,K2For
Second threshold voltage, K2≤K1, then manual welding machine increase output current is controlled.
The intelligent detection device of the manual welding machine arc voltage of embodiment five, when being welded as manual arc, welding machine is outer special
Property be the control of constant-current characteristics additional Arc.It is constant-current characteristics i.e. under normal arc voltage, makes welding current not with arc length
Change, it is ensured that specification stabilization, arc stability is flexible；When the too short arc voltage of arc length is too low, welding current is with arc voltage
Reduction and increase, with foot electric arc arc length is recovered (i.e. so-called Arc) automatically, make arc stability, thrust size independently may be used
Adjust.The intelligent detection device of the manual welding machine arc voltage of embodiment five, by the real-time detection to arc voltage, controls welding machine
Output current so that manual electric arc welding Arc control have very strong adaptive ability.
Embodiment six
The intelligent detection device of the manual welding machine arc voltage based on embodiment one, the controller works as U7Less than the 3rd
Threshold voltage K3Duration be more than setting time t, then control manual welding machine reduce output current, K3≤K1。
Preferably, 0.3 second ＜ t ＜ 3.0 seconds.For example, t is 0.7 second, 1 second or 2 seconds.
The intelligent detection device of the manual welding machine arc voltage of embodiment six, when arc voltage is relatively low for a long time, then sentences
Surely it is welding rod short circuit for a long time, then controls manual welding machine to reduce output current, in case weldbonding bar.
Presently preferred embodiments of the present invention is the foregoing is only, is not intended to limit the invention, it is all in essence of the invention
Within god and principle, any modification, equivalent substitution and improvements done etc. should be included within the scope of protection of the invention.
Claims (10)
1. a kind of intelligent detection device of manual welding machine arc voltage, it is characterised in that including current detection circuit, voltage detecting
Circuit, controller, the first register；
The current detection circuit, for detecting the electric current in welding machine work output loop and exporting to the controller；
The voltage detecting circuit, for detecting the output voltage of welding machine electric power and exporting to the controller；
First register, for depositing manual welding machine output loop cable resistance；
The controller, for calculating and exports manual welding machine arc voltage；
U7=U1-RH* I, U7It is manual welding machine arc voltage, U1It is the output voltage of welding machine electric power, I is welding machine work output loop
In electric current, RHIt is the manual welding machine output loop cable resistance in the first register.
2. the intelligent detection device of manual welding machine arc voltage according to claim 1, it is characterised in that
The intelligent detection device of the manual welding machine arc voltage, also including the second register；
The controller, for calculating and exports manual welding machine arc voltage to second register.
3. the intelligent detection device of manual welding machine arc voltage according to claim 1, it is characterised in that
The controller, when the output voltage of welding machine electric power produces transition from high to low, then calculates output welding machine electric power and exports back
Road resistance RHTo first register；RH=U1L/IL,U1LThe output voltage of the welding machine electric power at the end of for transition, ILIt is transition
At the end of welding machine work output loop in electric current.
4. the intelligent detection device of manual welding machine arc voltage according to claim 3, it is characterised in that
If the output voltage of welding machine electric power is by operating voltage UOBecome less than the first threshold voltage K1, then the output of welding machine electric power
Voltage produces transition from high to low, K1＜ UO*4/5。
5. the intelligent detection device of manual welding machine arc voltage according to claim 4, it is characterised in that
K1It is UO/2、UO/ 3 or UO/4。
6. the intelligent detection device of manual welding machine arc voltage according to claim 3, it is characterised in that
If the differential value of the output voltage of welding machine electric power is less than -5000 volts/second, the output voltage of welding machine electric power is produced by height
To low transition.
7. the intelligent detection device of manual welding machine arc voltage according to claim 1, it is characterised in that
The controller, works as U7＜ K2,K2It is the second threshold voltage, K2≤K1, then manual welding machine increase output current is controlled.
8. the intelligent detection device of manual welding machine arc voltage according to claim 1, it is characterised in that
The controller, works as U7Less than the 3rd threshold voltage K3Duration be more than setting time t, then control manual welding machine reduce it is defeated
Go out electric current, K3≤K1。
9. the intelligent detection device of manual welding machine arc voltage according to claim 8, it is characterised in that
0.3 second ＜ t ＜ 3.0 seconds.
10. the intelligent detection device of manual welding machine arc voltage according to claim 8, it is characterised in that
T is 0.7 second, 1 second or 2 seconds.
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| US11033978B2 (en) * | 2018-02-28 | 2021-06-15 | Esab Ab | Arc voltage sensing and control for a welding apparatus |
| CN109822919A (en) * | 2019-01-31 | 2019-05-31 | 诸暨市逍遥管道科技有限公司 | During accurate control electric fusion welding on electric melting pipe fittings weldingvoltage welding method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6914440B2 (en) * | 2003-01-15 | 2005-07-05 | Matuschek Messtechnik Gmbh | Welding system and method utilizing a ground integrity monitor |
| CN102615386A (en) * | 2011-01-27 | 2012-08-01 | 株式会社大亨 | Power supply device for welding and welding machine |
| CN102699486A (en) * | 2012-03-02 | 2012-10-03 | 深圳麦格米特电气股份有限公司 | Method for controlling output characteristics of electric arc welding power source |
| CN202741891U (en) * | 2012-07-28 | 2013-02-20 | 深圳市瑞凌实业股份有限公司 | Sampling full digitalization current type proportion integration differentiation (PID) control circuit |
| CN104602848A (en) * | 2012-09-14 | 2015-05-06 | 伊利诺斯工具制品有限公司 | Method, controller and welding system for controlling welding operation based on compensated stud voltage |
| CN205254308U (en) * | 2015-10-15 | 2016-05-25 | 上海通用重工集团有限公司 | Manual welding machine arc voltage's intellectual detection system device |
-
2015
- 2015-10-15 CN CN201510666569.6A patent/CN105171190B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6914440B2 (en) * | 2003-01-15 | 2005-07-05 | Matuschek Messtechnik Gmbh | Welding system and method utilizing a ground integrity monitor |
| CN102615386A (en) * | 2011-01-27 | 2012-08-01 | 株式会社大亨 | Power supply device for welding and welding machine |
| CN102699486A (en) * | 2012-03-02 | 2012-10-03 | 深圳麦格米特电气股份有限公司 | Method for controlling output characteristics of electric arc welding power source |
| CN202741891U (en) * | 2012-07-28 | 2013-02-20 | 深圳市瑞凌实业股份有限公司 | Sampling full digitalization current type proportion integration differentiation (PID) control circuit |
| CN104602848A (en) * | 2012-09-14 | 2015-05-06 | 伊利诺斯工具制品有限公司 | Method, controller and welding system for controlling welding operation based on compensated stud voltage |
| CN205254308U (en) * | 2015-10-15 | 2016-05-25 | 上海通用重工集团有限公司 | Manual welding machine arc voltage's intellectual detection system device |
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Denomination of invention: Intelligent detection device for arc voltage of manual welding machines Effective date of registration: 20231026 Granted publication date: 20170616 Pledgee: Bank of Shanghai Co.,Ltd. Jing'an Sub branch Pledgor: SHANGHAI TAYOR WELDING MACHINE Co.,Ltd. Registration number: Y2023310000676 |
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