CN1293979C - Digital controlling method for communicating structure of short-circuit transient COz weld - Google Patents
Digital controlling method for communicating structure of short-circuit transient COz weld Download PDFInfo
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- CN1293979C CN1293979C CNB2004100845432A CN200410084543A CN1293979C CN 1293979 C CN1293979 C CN 1293979C CN B2004100845432 A CNB2004100845432 A CN B2004100845432A CN 200410084543 A CN200410084543 A CN 200410084543A CN 1293979 C CN1293979 C CN 1293979C
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Abstract
The present invention relates to a digital control method of a communication structure for short circuit transition CO2 welding, which belongs to the technical field of welding. A dual processor structure comprising a digital signal processor and a single chip computer processor is used for allocating tasks for the multitasking control of a CO2 dynamic short circuit transition process. The control tasks comprise: setting technological parameters, setting process parameters, controlling time sequence in the process of welding, displaying on-site parameters, collecting parameters of the CO2 short circuit transition process, controlling the complicated external characteristics of a power supply and the waveform of welding current, and controlling failure diagnosis. The digital signal processor of the present invention has abundant calculating function and rapid computing capacity to rapidly detect the parameters of the dynamic short circuit transition process in a real-time way and realize the complicated external characteristics of the power supply, the strong drive control capacity of the single chip computer processor is used for setting the welding parameters, controlling the time sequence of the CO2 short circuit transition process, and dynamically displaying the on-site parameters in a real-time way, and the rapid communication of the two processors is realized by the communication capacity of the single chip computer processor and the digital signal processor.
Description
Technical field
The present invention relates to a kind of digital control method, relate in particular to a kind of short circuiting transfer CO
2The digital control method of the communication structure of weldering.Be used for welding technology field.
Background technology
CO
2Gas shielded arc welding is energy-efficient welding method, and this method adopts short circuiting transfer mostly, and splashing is short circuiting transfer CO
2A subject matter of weldering has more research relevant for this respect both at home and abroad.The CO of short circuiting transfer
2Splashing in the process of welding is to produce moment, also need have an effect in the extremely short time to its inhibition; Simultaneously, CO
2Short circuit transition is a dynamic metastable process, and for the control of such dynamic process, its generator characteristic also should have adaptive variation.Satisfy above-mentioned two conditions, need the control system that dynamically to regulate the generator characteristic shape, have the function that instantaneous inhibition is splashed simultaneously.Up-to-date ripple control theory is meticulous short circuiting arc welding Current Waveform Control, is that the generation that the angle from microcosmic suppresses to splash effectively provides strong support, realize this process, requires the control system of rapidity equally.For the pure hardware circuit control system, complex circuit, structure are not compact, very easy phase mutual interference between the each several part, and can only realize the control of simple single generator characteristic, the very difficult realization generator characteristic of real-time is fast regulated; And at present relevant CO
2The short circuiting transfer Current Waveform Control generally adopts the processor of single chip computer or the DSP CONTROL of single CPU, though can carry out the control of the welding procedure of single task role or less task preferably, but because the task of CPU is carried out is to rely on one by one execution command to finish, and being timesharing, the execution of these instructions carries out, for as CO
2The dynamic process process of the such complexity of short circuiting transfer and have quick ripple control and the real-time control system of the multitask structure control of external characteristics regulatory function, the single CPU Control System of Microcomputer, be difficult to realize that the multitask structure is temporal and put the generation problem, be difficult to the calculating and the requirement of ripple control fast of the very strong complicated generator characteristic algorithm of realization real-time simultaneously.
Find by prior art documents, U.S.'s patent of invention in 2002, the patent No.: 6335511, patent name: " Control method and apparatus for an arc welding system " (control method of electric arc welding system and device), realize the complex control system of the two closed loops of impulse welding, adopt a digital signal processor only to realize the realization of digital filtering and control algolithm, and other critical function is (as pulse signal generator, the control driving of motor etc.) be difficult in realization synchronously on this digital signal processor, need to adopt other control circuit.
Summary of the invention
The objective of the invention is to overcome deficiency of the prior art, a kind of short circuiting transfer CO is provided
2The digital control method of the communication structure of weldering is exported it on the one hand in real time and is satisfied short circuiting transfer CO
2The complicated generator characteristic of dynamic process makes generator characteristic become the meticulous control of microcosmic by the control of macroscopic view, and carries out the control of real-time welding current waveform, solves the task of multitask system effectively and puts the sequence problem and the CO of generation
2The problem of the quick ripple control of short circuiting transfer can be carried out the communication between the dual processor easily, reasonably carries out the distribution of task.
The present invention is achieved by the following technical solutions, and the technology of a key of the present invention is with the bi-processor architecture of digital signal processor and processor of single chip computer dual processor, carries out CO
2Dynamically the reasonable task of short circuit transition multitask control is distributed, and finish rapid data transmission between this two fast processor by the serial ports asynchronous communications protocol: the parameter that processor of single chip computer shows when carrying out the cycle time of welding process control task passes to processor of single chip computer by digital signal processor; The generator characteristic of digital signal processor is determined and the Waveform Control algorithm is determined welding procedure and the procedure parameter that need pass over according to processor of single chip computer, and at CO
2The welding stage during short circuiting transfer is dynamically controlled is judged needs the processor of single chip computer transmission to obtain concrete welding session information.To CO
2Dynamically the control of short circuit transition is the control structure of a multitask, and the control of each task is in time and puts generation, utilize reasonably allocating task of digital signal processor and processor of single chip computer dual processor, solve the time conflict problem of multitask structure effectively, finish the fast data transmission by the serial ports asynchronous communication between the two.Utilize digital signal processor as field data collection, processing like this, the message handler of calculating, utilize processor of single chip computer as field control, the control processor that drives, be provided with etc., finish CO
2The multitask of the complicated dynamic process of short circuiting transfer is controlled in real time.
Another crucial technology of the present invention is that processor of single chip computer and digital signal processor all detect signal detection circuit (electric current has/do not have, short circuit/arcing), to guarantee the strictness of two processors in welding process synchronously: 1) aspect the control of processor of single chip computer, mainly be the startup of welding process and stop and the detection of current interruption phenomenon, when processor of single chip computer detects electric current sometimes by signal detection circuit, when striking, then start welding process; When detecting electric current and do not have, normal condition then finishes welding process, and improper situation then is the current interruption phenomenon.2) aspect the control of digital signal processor, except comprising the effect of signal detection circuit aspect the control of processor of single chip computer, also carry out the detection of short circuit and arcing, when digital signal processor detects short circuit by signal detection circuit, carry out the control of short circuit phase; Otherwise, carry out the control of arcing phase.
Among the present invention, digital control task comprises: technological parameter setting, procedure parameter setting, CO
2Short circuit transition SECO, on-site parameters show, CO
2Short circuit transition parameter acquisition, complicated generator characteristic and welding current waveform control, fault diagnosis control.
1) control task that is assigned to of processor of single chip computer comprises: technological parameter setting, procedure parameter setting, cycle time of welding process control, on-site parameters show, are finished by 4 steps:
1. technological parameter setting: technological parameter comprises that welding method is selected, the solder wire material of real core/medicine core is selected, the gage of wire of 1.2mm/1.0mm is selected, unified adjusting/indivedual parameter regulative modes of regulating are selected, the welding current form of impulse welding/direct current weldering is selected, processor of single chip computer detects these five technological parameters by the process choice circuit, when detection signal is " 1 ", then be the parameter that performs of relevant parameter, otherwise be the lower gear parameter of relevant parameter;
2. procedure parameter setting: procedure parameter comprises weldingvoltage, welding current, unified parameter (in unified adjusting), pulse current (in impulse welding), background current (in impulse welding), pulse frequency (in impulse welding), burst length (in impulse welding), these 7 procedure parameters will be provided with according to the result of technological parameter setting, processor of single chip computer reads procedure parameter by man-machine dialogue interface keyboard is set, according to the keyboard value that reads, at first judge that parameter is provided with, key in data to the back reads then, finishes the setting of this parameter.
3. cycle time of welding process control: welding process comprise pre-gas stage, slow wire feed striking stage, normally weld stage, anti-haircuts stage, prolong five stages of gas stage, be that processor of single chip computer is exported control signal by sequential control circuit, to the source of welding current, wire-feed motor, electromagnetic gas valve, control that slow wire feed/normal wire feed switches these four controll plants: in the pre-gas stage, open electromagnetic gas valve, and carry out the timing of pre-gas time by the timer in the processor of single chip computer, the time is adjustable between 100ms～500ms; In the slow wire feed striking stage, control switches to slow wire feed shelves, opening power and wire-feed motor, and slow wire feed rate is fixed, and is determined by experiment; In the normal welding stage, control switches to normal wire feed shelves, and wire feed rate is provided with decision by the welding current in the procedure parameter setting up procedure; In the anti-haircuts stage, stop wire-feed motor, allow welding wire flash back, and prevent the timing of haircuts time by the timer in the processor of single chip computer, there are anti-haircuts timing of 380ms and the anti-haircuts of 100ms the time regularly, turns off power supply after regularly finishing; Prolonging the gas stage, carrying out the timing of pre-gas time by the timer in the processor of single chip computer, the time is adjustable between 100ms～500ms, turns off electromagnetic gas valve.
4. on-site parameters shows: shows above-mentioned technological parameter, procedure parameter 2., the on-site parameters in five stages when cycle time of welding process is 3. controlled 1..
2) control task that is assigned to of digital signal processor comprises: generator characteristic is determined and the Waveform Control algorithm is determined, CO
2Short circuiting transfer is dynamically controlled, fault diagnosis control, is finished by 3 steps:
1. generator characteristic is determined to determine with the Waveform Control algorithm: the generator characteristic of employing comprises constant voltage external characteristics, external characteristics of constant current, fall volt-ampere characteristic, and its control law adopts has proportionality coefficient K
p, integral coefficient K
iTwo PI controls of regulating parameter, the Waveform Control algorithm of employing comprises CO
2The short I that suppresses of little electric current wink of short circuiting transfer
1, the short circuit current rate of climb (di/dt)
1, the quick-fried disconnected I of little electric current necking down
2, arcing pulse current I
3, arcing current decrease speed (di/dt)
2, arcing background current I
4The Waveform Control of these six kinds of situations.Various process parameter and different welding stage during the difference welding procedure, the proportionality coefficient K that adopts different PI to control
pWith integral coefficient K
iAnd each Waveform Control parameter I
1, (di/dt)
1, I
2, I
3, (di/dt)
2, arcing background current I
4In short circuit initial stage and later stage, adopt the constant-current supply external characteristics, in the initial stage and the later stage of arcing, adopt constant voltage external characteristics and external characteristics of constant current simultaneously, and, adopt the constant voltage external characteristics in arcing mid-term.
2. CO
2Short circuiting transfer is dynamically controlled: mainly calculate, control four little steps of output by parameter acquisition, the judgement of welding stage, external characteristics and Waveform Control algorithm: at first by A/D interface in the digital signal processor and data acquisition circuit welding current and weldingvoltage are gathered, frequency acquisition is 1O0 μ s, and the data that collect are carried out filtering handle, calculate electric current pace of change (di/dt) and voltage change speed (du/dt); Transmission obtains concrete welding session information and signal detection circuit and obtains the judgement that welding current characteristic parameter (electric current has or not) and short circuit characteristic parameter (short circuit/arcing) weld the stage according to processor of single chip computer; External characteristics and Waveform Control algorithm calculate by 1. the external characteristics algorithm and the Waveform Control algorithm in middle different technical parameters, various process parameter and the different welding stage of selecting calculate; At last result calculated is controlled by the PWM interface of digital signal processor and outputed to the PWM drive circuit.
3. fault diagnosis control: 1. above-mentioned or 2. after all carry out fault diagnosis control.Fault comprises overheated, the overcurrent of welding current of overvoltage that net is pressed and under-voltage, power component and the overcurrent of power switch component, and fault diagnosis control comprises that fault detect, fault diagnosis, fault alarm, troubleshooting, warning eliminate five actions.Not maskable by digital signal processor interrupts fault is detected: when fault-free, directly finish this process; When fault, method diagnosis with inquiry is that fault, control the warning that the fault alarm indicator lamp carries out corresponding failure then, the means of turning off the source of welding current and wire-feed motor, stopping to control output are adopted in processing to fault, after handling, remove corresponding report to the police (promptly closing corresponding fault alarm indicator lamp).
Digital signal processor of the present invention, have abundant calculation function and quick computing capability, carry out the realization of dynamic short circuit transition parameter detecting and complicated generator characteristic algorithm in real time fast, as field data collection, processing, the message handler of calculating; Utilize the powerful driving control ability of processor of single chip computer to carry out welding procedure and welding process parameter setting, CO in real time
2The dynamic demonstration of short circuit transition SECO, on-site parameters is as the control processor of controlling, driving, be provided with etc.; And, realize the high-speed traffic between the dual processor further by the communication capacity of processor of single chip computer and digital signal processor, constitute CO based on the double processor communication structure
2The complete control system of welding machine.
Description of drawings
Fig. 1 is the control block diagram of processor of single chip computer of the present invention
As shown in Figure 1, the control block diagram of processor of single chip computer, parameter setting up procedure, welding process two parts are arranged, finish Control Welding Process, technological parameter setting, procedure parameter setting and on-site parameters and show four tasks, in the parameter setting up procedure, mainly finish technological parameter setting and procedure parameter setting; In welding process, mainly finish CO
2The short circuit transition SECO; And parameter is presented at all existence in this two big process.Parameter setting up procedure and welding process decide specifically enter which process by the testing result that the process switch detects.When detecting the process switch, then enter into welding process in the welding position; In parameter the position is set when detecting the process switch, then enters the parameter setting up procedure.
Fig. 2 is the control block diagram of digital signal processor of the present invention
As shown in Figure 2, the control block diagram of digital signal processor, the control of processor of single chip computer synchronously, the control of digital signal processor also has two big processes: parameter setting up procedure and welding process, finish generator characteristic and determine, CO definite with the Waveform Control algorithm
2Short circuiting transfer is dynamically controlled, three tasks of fault diagnosis control.In the parameter setting up procedure, finish generator characteristic and determine to determine, in welding process, carry out CO with the Waveform Control algorithm
2Short circuiting transfer is dynamically controlled, and the fault diagnosis of all carrying out at last of this two process is controlled.Digital signal processor is judged by the procedural information of accepting processor of single chip computer and passing over, when being configuration information, is entered the procedure parameter setting up procedure; When being weld information, enter welding process.
The specific embodiment
Embodiment:
1. technological parameter setting (by 5 process choice switches on the source of welding current panel):
1. welding method selector switch;
2. the real core of solder wire material selector switch/medicine core;
3. gage of wire selector switch 1.2mm/1.0mm;
4. the unified adjusting of parameter regulative mode selector switch/indivedual the adjusting;
5. welding current form selector switch impulse welding/direct current weldering.
2. procedure parameter setting:
1. weldingvoltage 15～26V;
2. welding current 40～350A;
3. welding process is finished technical indicator:
1. pre-gas time 100ms～500ms is adjustable;
2. slow wire feed rate 1～2m/min is adjustable;
3. anti-haircuts time 380ms and 100ms;
4. it is adjustable to prolong gas time 100ms～500ms.
4. on-site parameters shows:
1. technological parameter;
2. procedure parameter;
3. five of welding process stages: pre-gas, slow wire feed striking, normal welding, anti-haircuts, prolong gas.
5. generator characteristic: adopting the constant voltage external characteristics during arcing, is external characteristics of constant current in the short circuit initial stage 0.8ms;
6. Waveform Control: carry out short inhibition the in wink in the short circuit initial stage 0.8ms;
7. power system failure:
1. net the overvoltage and under-voltage 〉=10% of pressing;
2. overcurrent＞the 400A of welding current.
The most outstanding advantage of the present invention is to make full use of dual processor advantage and function separately, for the stronger CO of real-time
2The control of the complicated meticulous process of the dynamic transition of short circuit has solved the time of static power source external characteristics, dynamic welding current Waveform Control well and has put the problem of generation, according to the rational task collocation of dual processor, finishes CO well simultaneously
2Meticulous external characteristics of each feature stage is regulated and is controlled in the short circuit transition, has very strong real-time and controllability; Make full use of the various abundant operational capabilities of digital signal processor and the order structure of quick computing simultaneously, quick acquisition process to a large amount of welding field datas provides strong favourable support, and carries out the calculating of any generator characteristic and the selection of optimal control rule; Further, on digital signal processor, carry out the foundation of Digital Signal Processing, expert database easily, make CO
2The control of short circuit transition has risen on digitlization, the informationalized height, makes the CO by its control to a great extent
2Welding machine has advanced person, novelty and top grade.In view of this technology Application and Development seldom in welding equipment and method and technology field, so this development has certain advance and frontier nature at welding field.
Claims (3)
1, a kind of short circuiting transfer CO
2The digital control method of the communication structure of weldering is characterized in that, the bi-processor architecture with digital signal processor and processor of single chip computer dual processor carries out CO
2Dynamically the reasonable task of short circuit transition multitask control is distributed, and control task comprises: technological parameter setting, procedure parameter setting, cycle time of welding process control, on-site parameters show, CO
2Short circuit transition parameter acquisition, complicated generator characteristic and welding current waveform control, fault diagnosis control, specific as follows:
1) control task that is assigned to of processor of single chip computer comprises: technological parameter setting, procedure parameter setting, cycle time of welding process control, on-site parameters show, are finished by 4 steps:
1. technological parameter setting: technological parameter comprises that welding method is selected, the solder wire material of real core/medicine core is selected, the gage of wire of 1.2mm/1.0mm is selected, unified adjusting/indivedual parameter regulative modes of regulating are selected, the welding current form of impulse welding/direct current weldering is selected, processor of single chip computer detects these five technological parameters by the process choice circuit, when detection signal is " 1 ", then be the parameter that performs of relevant parameter, otherwise be the lower gear parameter of relevant parameter;
2. procedure parameter setting: process comprises weldingvoltage, welding current, unified parameter, pulse current, background current, pulse frequency, burst length, these 7 procedure parameters will be provided with according to the result of technological parameter setting, processor of single chip computer reads procedure parameter by man-machine dialogue interface keyboard is set, according to the keyboard value that reads, at first judge that parameter is provided with, key in data to the back reads then, finishes the setting of this parameter;
3. cycle time of welding process control: welding process comprise pre-gas stage, slow wire feed striking stage, normally weld stage, anti-haircuts stage, prolong five stages of gas stage, be that processor of single chip computer is exported control signal by sequential control circuit, to the source of welding current, wire-feed motor, electromagnetic gas valve, control that slow wire feed/normal wire feed switches these four controll plants: in the pre-gas stage, open electromagnetic gas valve, and carry out the timing of pre-gas time by the timer in the processor of single chip computer, the time is adjustable between 100ms～500ms; In the slow wire feed striking stage, control switches to slow wire feed shelves, opening power and wire-feed motor, and slow wire feed rate is fixed, and is determined by experiment; In the normal welding stage, control switches to normal wire feed shelves, and wire feed rate is provided with decision by the welding current in the procedure parameter setting up procedure; In the anti-haircuts stage, stop wire-feed motor, allow welding wire flash back, and prevent the timing of haircuts time by the timer in the processor of single chip computer, there are anti-haircuts timing of 380ms and the anti-haircuts of 100ms the time regularly, turns off power supply after regularly finishing; Prolonging the gas stage, carrying out the timing of pre-gas time by the timer in the processor of single chip computer, the time is adjustable between 100ms～500ms, turns off electromagnetic gas valve;
4. on-site parameters shows: show above-mentioned technological parameter, procedure parameter 2., five stages when cycle time of welding process is 3. controlled 1.;
2) control task that is assigned to of digital signal processor comprises: generator characteristic is determined and the Waveform Control algorithm is determined, CO
2Short circuiting transfer is dynamically controlled, fault diagnosis control, is finished by 3 steps:
1. generator characteristic is determined to determine with the Waveform Control algorithm: the generator characteristic of employing comprises constant voltage external characteristics, external characteristics of constant current, fall volt-ampere characteristic, and its control law adopts has proportionality coefficient K
p, integral coefficient K
iTwo PI controls of regulating parameter, the Waveform Control algorithm of employing comprises CO
2The short I that suppresses of little electric current wink of short circuiting transfer
1, the short circuit current rate of climb (di/dt)
1, the quick-fried disconnected I of little electric current necking down
2, arcing pulse current I
3, arcing current decrease speed (di/dt)
2, arcing background current I
4Various process parameter and different welding stage when the Waveform Control of these six kinds of situations, different welding procedure adopt the proportionality coefficient K of different PI control
pWith integral coefficient K
iAnd each Waveform Control parameter L
1, (di/dt)
1, I
2, I
3, (di/dt)
2, arcing background current I
4, in short circuit initial stage and later stage, adopt the constant-current supply external characteristics, in the initial stage and the later stage of arcing, adopt constant voltage external characteristics and external characteristics of constant current simultaneously, and, adopt the constant voltage external characteristics in arcing mid-term;
2. CO
2Short circuiting transfer is dynamically controlled: mainly calculate, control four little steps of output by parameter acquisition, the judgement of welding stage, external characteristics and Waveform Control algorithm: at first by A/D interface in the digital signal processor and data acquisition circuit welding current and weldingvoltage are gathered, frequency acquisition is 100 μ s, and the data that collect are carried out filtering handle, calculate electric current pace of change (di/dt) and voltage change speed (du/dt); Transmission obtains concrete welding session information and signal detection circuit and obtains the judgement that welding current characteristic parameter and short circuit characteristic parameter weld the stage according to processor of single chip computer; External characteristics and Waveform Control algorithm calculate by 1. the external characteristics algorithm and the Waveform Control algorithm in middle different technical parameters, various process parameter and the different welding stage of selecting calculate; At last result calculated is controlled by the PWM interface of digital signal processor and outputed to the PWM drive circuit;
3. fault diagnosis control: 1. above-mentioned or 2. after all carry out fault diagnosis control.Fault comprises overheated, the overcurrent of welding current of overvoltage that net is pressed and under-voltage, power component and the overcurrent of power switch component, fault diagnosis control comprises fault detect, fault diagnosis, fault alarm, troubleshooting, five actions of warning elimination, not maskable by digital signal processor interrupts fault is detected: when fault-free, directly finish this process; When fault, diagnosing with the method for inquiry is that fault, controls the warning that indicator lamp carries out corresponding failure then, and the means of turning off the source of welding current and wire-feed motor, stopping to control output are adopted in the processing of fault, after handling, removes accordingly and reports to the police.
2, short circuiting transfer CO according to claim 1
2The digital control method of the communication structure of weldering, it is characterized in that carrying out the fast data transmission between processor of single chip computer and the digital signal processor by communication serial port: the parameter that processor of single chip computer shows passes to processor of single chip computer by digital signal processor when carrying out the cycle time of welding process control task; The generator characteristic of digital signal processor is determined and the Waveform Control algorithm is determined welding procedure and the procedure parameter that need pass over according to processor of single chip computer, and at CO
2The welding stage during short circuiting transfer is dynamically controlled is judged needs the processor of single chip computer transmission to obtain concrete welding session information.
3, short circuiting transfer CO according to claim 1
2The digital control method of the communication structure of weldering, its feature is that also processor of single chip computer and digital signal processor all detect signal detection circuit, to guarantee the strictness of two processors in welding process synchronously:
1) aspect the control of processor of single chip computer, the startup of welding process and stopping and the detection of current interruption phenomenon when processor of single chip computer detects electric current sometimes by signal detection circuit, then starts welding process when striking; When detecting electric current and do not have, normal condition then finishes welding process, and improper situation then is the current interruption phenomenon;
2) aspect the control of digital signal processor, except comprising the effect of signal detection circuit aspect the control of processor of single chip computer, also carry out the detection of short circuit and arcing, when digital signal processor detects short circuit by signal detection circuit, carry out the control of short circuit phase; Otherwise, carry out the control of arcing phase.
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| CNB2004100845432A CN1293979C (en) | 2004-11-25 | 2004-11-25 | Digital controlling method for communicating structure of short-circuit transient COz weld |
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|---|---|---|---|
| CNB2004100845432A CN1293979C (en) | 2004-11-25 | 2004-11-25 | Digital controlling method for communicating structure of short-circuit transient COz weld |
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| CN1293979C true CN1293979C (en) | 2007-01-10 |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101327542B (en) * | 2007-06-22 | 2010-11-17 | 唐山松下产业机器有限公司 | Control method and apparatus for processing striking and sticking thread of welding |
| CN102398101A (en) * | 2011-11-21 | 2012-04-04 | 无锡市南方电器制造有限公司 | Welding control method of a digitalized direct current pulse MIG welding machine and welding control circuit thereof |
| CN103100785B (en) * | 2013-02-28 | 2015-11-25 | 广州长胜机电有限公司 | A kind of digitlization inverter arc welding machine output stage short circuit automatic protective system |
| JP6154672B2 (en) * | 2013-06-13 | 2017-06-28 | 株式会社ダイヘン | Necking detection control method for welding power source |
| CN107009000B (en) * | 2017-06-01 | 2019-03-19 | 石惟一 | A kind of alternately wire feed and the welding machine and its power control method that reel off raw silk from cocoons |
| CN108941842A (en) * | 2018-08-10 | 2018-12-07 | 信联网（深圳）五金技术有限公司 | A kind of Manual electric welding machine of monitoring short circuit liquid bridge variation |
| CN114879607A (en) * | 2022-05-23 | 2022-08-09 | 苏州威尔达焊接设备有限公司 | Intelligent welding power supply control system |
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| CN2173679Y (en) * | 1993-04-29 | 1994-08-10 | 西安宝达成套焊接器材有限公司焊接研究所 | Inversion power supply for CO2 welding |
| JPH07214315A (en) * | 1994-02-09 | 1995-08-15 | Hitachi Seiko Ltd | Method and device for controlling output in consumable electrode type gas shielded arc welding |
| CN1234306A (en) * | 1999-04-02 | 1999-11-10 | 北京工业大学 | Fuzzy control method for cooperating type CO2 welding circuit-shorting transition and welding machine thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4902866A (en) * | 1988-08-08 | 1990-02-20 | Carlo Galantino | Apparatus for mixing gases for use in arc welding processes |
| CN2173679Y (en) * | 1993-04-29 | 1994-08-10 | 西安宝达成套焊接器材有限公司焊接研究所 | Inversion power supply for CO2 welding |
| JPH07214315A (en) * | 1994-02-09 | 1995-08-15 | Hitachi Seiko Ltd | Method and device for controlling output in consumable electrode type gas shielded arc welding |
| CN1234306A (en) * | 1999-04-02 | 1999-11-10 | 北京工业大学 | Fuzzy control method for cooperating type CO2 welding circuit-shorting transition and welding machine thereof |
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