CN103347638B - Multielectrode gas-shielded electric arc automatic soldering device - Google Patents
Multielectrode gas-shielded electric arc automatic soldering device Download PDFInfo
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- CN103347638B CN103347638B CN201280007520.4A CN201280007520A CN103347638B CN 103347638 B CN103347638 B CN 103347638B CN 201280007520 A CN201280007520 A CN 201280007520A CN 103347638 B CN103347638 B CN 103347638B
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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
- B23K9/16—Arc welding or cutting making use of shielding gas
- B23K9/173—Arc welding or cutting making use of shielding gas and of a consumable electrode
- B23K9/1735—Arc welding or cutting making use of shielding gas and of a consumable electrode making use of several electrodes
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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
- B23K9/16—Arc welding or cutting making use of shielding gas
- B23K9/173—Arc welding or cutting making use of shielding gas and of a consumable electrode
-
- 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
- B23K9/06—Arrangements or circuits for starting the arc, e.g. by generating ignition voltage, or for stabilising the arc
- B23K9/073—Stabilising the arc
-
- 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
- B23K9/095—Monitoring or automatic control of welding parameters
- B23K9/0956—Monitoring or automatic control of welding parameters using sensing means, e.g. optical
-
- 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
- B23K9/12—Automatic feeding or moving of electrodes or work for spot or seam welding or cutting
Abstract
The generation of the weld defect preventing the destabilization of motlten metal reservoir from causing and the feature being suitable for the multielectrode gas-shielded electric arc automatic soldering device of the automation of gas protective arc welding are, possess: voltage detection mechanism (18), it detects the voltage between target (5) and soldered material (1), short circuit decision mechanism (19), it is transfused to the voltage detected by described voltage detection mechanism (18), determines whether short circuit, target is with electric current set mechanism (20), it is by from outside input current value signal, and when described short circuit decision mechanism (19) is judged to be short circuit, the current value signals of expression first current value (11) is exported as current value setting signal to described target dc source (M), when described short circuit decision mechanism (19) is judged to be non-short circuit, to represent that the current value signals of second current value (I2) less than described first current value (I1) exports as current value setting signal to described target dc source (M), speed control mechanism (32), electrode feeding mechanism (27).
Description
Technical field
The present invention relates to multielectrode gas-shielded electric arc automatic soldering device; particularly relate to and possess precursor gas shielded arc welding receiving electrode, subsequent gases shielded arc welding receiving electrode and target, and the multielectrode gas-shielded electric arc automatic soldering device of the generation of weld defect can be prevented.
Background technology
All the time, in order to realize the high efficiency of the horizontal corner connection used in the field such as shipbuilding, bridge, the multielectrode gas-shielded electric arc automatic soldering device having a kind of speed of welding fast is proposed.
Such as, a kind of 3 electrode arc welding control methods are disclosed in patent document 1.This technology is technology as follows: be configured on sealing wire by three electrode files, utilizes the electric arc of target to control the motlten metal reservoir (Soup だ ま り) produced by the electric arc of leading electrode and subsequent electrode.
But, in technology disclosed in patent document 1, because leading electrode, subsequent electrode and target are all connected with the positive pole of power supply, therefore under three effects to the electric current of equidirectional flowing, the magnetic field that the co-currents such as arc blow that may mostly occur in welding position cause is interfered.
In addition, in technology disclosed in patent document 1, the not only electric arc of leading electrode and subsequent electrode, the electric arc of this target is also subject to the impact interfered in above-mentioned magnetic field, therefore the probability that the motlten metal reservoir that certain electric arc by target controls becomes unstable is high, consequently, cause the possibility of weld defect high.
In order to eliminate problem as described above, in patent document 2, disclosing a kind of leading electrode and subsequent electrode of making be connected with the positive pole of power supply and the welding method that target is connected with the negative pole of power supply, being used as multielectrode gas-shielded electric arc automatic soldering method.By being formed as such structure, the magnetic field that the electric arc that can alleviate leading electrode and subsequent electrode by the electric current (electric current reverse with the electric current flow through in leading electrode and subsequent electrode) flow through in target causes is interfered.
In addition, in the technology disclosed in patent document 2, the unfavorable electric arc of target and melting, the melting by stable Joule heat, therefore compared with the technology disclosed in patent document 1, can stably control motlten metal reservoir.
[at first technical literature]
[patent document]
[patent document 1] Japanese Unexamined Patent Publication 2002-219571 publication
[patent document 2] Japanese Unexamined Patent Publication 2004-261839 publication
[summary of invention]
[inventing the problem that will solve]
But, in the technology disclosed in patent document 2, the feeding speed of target is made to reduce instantaneously or stop because of the variation of the feeding resistance of target, thus the situation that the melting amount that there is the target that Joule heat causes is too much relative to the feeding quantitative change of target.In addition, also there is some external disturbance such as the electric arc deflection caused because of arc blow, the shape of motlten metal reservoir is changed, thus the situation making motlten metal reservoir different from time stable with the relative position relation of target.
In situation as described above, the front end of target is separated from molten bath, between the front end and molten bath of target, produce electric arc.Further, because this electric arc makes motlten metal reservoir become unstable, consequently, exist and cannot obtain the such problem points of good weld part.
In addition, in the technology disclosed in patent document 2, the insertion defect in order to avoid target to molten bath, needs the melting amount feeding amount of target being controlled to the target caused than Joule heat a little.But when carrying out such control, the possibility that the front end of certain target is separated from molten bath uprises, therefore same with above-mentioned situation, because of the electric arc produced between the front end of target and molten bath, make motlten metal reservoir become unstable, thus good weld part cannot be obtained.
It should be noted that, also consider following means: the feeding velocity variations making target, be controlled to and maintain the front end of target and be inserted into short-circuit condition in motlten metal reservoir, avoid the problem of the destabilization of motlten metal reservoir thus.But, according to these means, in order to control with the target in the thin footpath of at a high speed feeding, need to be configured near the front end of target by the little feeder unit of the inertia (inertia) of just reverse rotation control.Therefore, cost uprises, and has the shortcoming of the free degree reduction especially on the apparatus design that narrow and small position configures 3 electrodes, thus is not suitable as the means being applicable to multielectrode gas-shielded electric arc automatic soldering device.
Consequently, adopting makes the feeding speed of target be fixed speed, and the such method of the electric current of fixed value is supplied from dc source to target, the possibility of the generation of the weld defect that the destabilization of therefore above-mentioned motlten metal reservoir causes still exists.Therefore, people is needed suitably to confirm welding situation to be adjusted to proceed the target feeding speed of stable welding.Therefore, existing technology can not be referred to as the technology of the automation of very applicable gas protective arc welding.
Summary of the invention
The present invention proposes in view of the above-mentioned problems; its problem is the generation providing a kind of weld defect preventing the destabilization of motlten metal reservoir from causing, and is suitable for the multielectrode gas-shielded electric arc automatic soldering device of the automation of gas protective arc welding.
[for solving the means of problem]
In order to solve above-mentioned problem, multielectrode gas-shielded electric arc automatic soldering device of the present invention possesses precursor gas shielded arc welding receiving electrode and subsequent gases shielded arc welding receiving electrode, also between this precursor gas shielded arc welding receiving electrode and this subsequent gases shielded arc welding receiving electrode, possesses target, and this precursor gas shielded arc welding receiving electrode, this subsequent gases shielded arc welding receiving electrode and this target are sacrificial electrode, the feature of described multielectrode gas-shielded electric arc automatic soldering device is, possess: two dc sources, they connect respectively with the described precursor gas shielded arc welding receiving electrode of fixing speed feeding and described subsequent gases shielded arc welding receiving electrode at positive pole respectively, soldered material is connected at negative pole, and there is constant voltage characteristic, target dc source, it connects described soldered material at positive pole, connects described target at negative pole, and has and determine current characteristics, voltage detection mechanism, it detects the voltage between described target and described soldered material, short circuit decision mechanism, it is transfused to the voltage detected by described voltage detection mechanism, determines whether short circuit, target electric current set mechanism, it is by from outside input current value signal, and when described short circuit decision mechanism is judged to be short circuit, the current value signals of expression first current value is exported as current value setting signal to described target dc source, and when described short circuit decision mechanism is judged to be non-short circuit, will represent that the current value signals of second current value less than described first current value exports as current value setting signal to described target dc source, speed control mechanism, it makes the feeding speed of described target be fixing speed, electrode feeding mechanism, described target feeds towards described soldered material by it.
According to such structure; multielectrode gas-shielded electric arc automatic soldering device of the present invention is when target is the state of short circuit; according to detecting the magnitude of voltage of input by voltage detection mechanism, short circuit decision mechanism is judged as that target is short-circuited; consequently; to select with electric current set mechanism the current value signals representing the first current value by target, and the mode making target dc source supply the electric current of the first current value to target controls.
On the other hand; multielectrode gas-shielded electric arc automatic soldering device of the present invention is when target is the state of non-short circuit; according to detecting the magnitude of voltage of input by voltage detection mechanism, short circuit decision mechanism is judged as that target is not short-circuited; consequently; to select with electric current set mechanism the current value signals representing the second current value by target, and the mode making target dc source supply the electric current of the second current value to target controls.
Therefore; multielectrode gas-shielded electric arc automatic soldering device of the present invention is not when target is short-circuited and becomes the state producing electric arc; the electric current of second current value less than common current value (the first current value) can be supplied, therefore, it is possible to make the melting amount of target reduce than melting amount during short circuit to target.Therefore, according to multielectrode gas-shielded electric arc automatic soldering device of the present invention, even if target is not short-circuited and becomes the state producing electric arc, also target instantaneous short circuit can be made.
Further, usually when sacrificial electrode with have the dc source determining current characteristics be connected, adopt and detect the feeding speed of voltage to sacrificial electrode and carry out speed Control, thus maintain the method for fixing voltage.But; although the target of multielectrode gas-shielded electric arc automatic soldering device of the present invention with there is the dc source determining current characteristics be connected; but maintain short-circuit condition, therefore, it is possible to by target with the supply of fixing speed owing to being undertaken controlling by the electric current of above-mentioned such subtend target supply.Therefore, do not need to carry out speed Control to feeding speed as existing with having sacrificial electrode that the dc source of determining current characteristics is connected, therefore do not need to arrange the controlling organization to the complexity that feeding speed controls, consequently, can the cost of restraining device entirety.In addition, must arrange at narrow and small position in the multielectrode gas-shielded electric arc automatic soldering device of multiple electrode, near the front end not needing feeder unit to be arranged on target, therefore, it is possible to guarantee the free degree on apparatus design.
In addition; preferred multielectrode gas-shielded electric arc automatic soldering device of the present invention possesses target auxiliary DC power supply; this target auxiliary DC power supply and described target dc source are connected in parallel; and connect described soldered material at positive pole; connect described target at negative pole, and there is high-impedance behavior.
According to such structure; multielectrode gas-shielded electric arc automatic soldering device is not when target is short-circuited and becomes the state producing electric arc; for target; when output being stopped in fact in order to become the electric current of the second current value or when output is stopped, voltage detection mechanism also all detects the high voltage that target auxiliary DC power supply shows.Consequently, short circuit decision mechanism can judge whether short circuit.
Therefore; multielectrode gas-shielded electric arc automatic soldering device of the present invention is when target becomes the state of non-short circuit; for target; in order to when becoming the electric current of second current value less than common current value (the first current value) and make output stop in fact or when making output stop, the melting amount of target also can both be made to reduce relative to the feeding amount of target.
In addition, the described target auxiliary DC power supply of preferred multielectrode gas-shielded electric arc automatic soldering device of the present invention has the output characteristics that short circuit current is below 1A.
By target auxiliary DC power supply, there is above-mentioned output characteristics, thus supply electric current from target auxiliary DC power supply hardly to target in fact.Therefore, only electric current is supplied from the target dc source being undertaken by target electric current set mechanism suitably controlling to target.That is, the electric current to target supply can suitably be controlled.
In addition, preferred multielectrode gas-shielded electric arc automatic soldering device of the present invention is concentrated and is possessed described voltage detection mechanism, described short circuit decision mechanism, described target electric current set mechanism, described speed control mechanism, described target dc source in a framework.
According to such structure, do not need to arrange each devices such as voltage detection mechanism, short circuit decision mechanism, target electric current set mechanism, speed control mechanism separately, can the cost of restraining device entirety, and can reduce device required space is set.
In addition, because voltage detection mechanism, short circuit decision mechanism, target electric current set mechanism, speed control mechanism are positioned at framework together with the target source of welding current, therefore noise immunity improves, and the reliability of device improves.
In addition, preferred multielectrode gas-shielded electric arc automatic soldering device of the present invention is applicable to horizontal corner connection.
By multielectrode gas-shielded electric arc automatic soldering device of the present invention is applicable to horizontal corner connection, thus more suitably can obtain the effect of invention.
[invention effect]
According to multielectrode gas-shielded electric arc automatic soldering device of the present invention; when target is not short-circuited and becomes the state producing electric arc; the electric current of second current value less than common current value (the first current value) can be supplied to target; even if therefore target is not short-circuited and becomes the state producing electric arc, also target instantaneous short circuit can be made.Consequently, motlten metal reservoir stabilisation can be made by the target of short circuit, good weld part can be obtained.
In addition; according to multielectrode gas-shielded electric arc automatic soldering device of the present invention; when target becomes the state of non-short circuit; for target; in order to when becoming the electric current of second current value less than common current value (the first current value) and make output stop in fact or when making output stop; can both short circuit be determined whether, even if therefore target becomes the state be not short-circuited, also can make target instantaneous short circuit.Consequently, motlten metal reservoir stabilisation can be made by the target of short circuit, good weld part can be obtained.
And; according to multielectrode gas-shielded electric arc automatic soldering device of the present invention; do not need to arrange as the existing controlling organization to the complexity that feeding speed controls with having sacrificial electrode that the dc source of determining current characteristics is connected; consequently, can the cost of restraining device entirety.In addition, must arrange at narrow and small position in the multielectrode gas-shielded electric arc automatic soldering device of multiple electrode, near the front end not needing feeder unit to be arranged on target, therefore, it is possible to guarantee the free degree on apparatus design.
In addition; according to multielectrode gas-shielded electric arc automatic soldering device of the present invention; owing to not needing to arrange each devices such as voltage detection mechanism, short circuit decision mechanism, target electric current set mechanism, speed control mechanism separately; therefore, it is possible to the cost of restraining device entirety; and can reduce device required space is set, and the reliability of device can be improved.
And; when carrying out big current welding or high-speed welding; external disturbance is large; and target easily becomes the state be not short-circuited; but according to multielectrode gas-shielded electric arc automatic soldering device of the present invention; even if target becomes the state be not short-circuited, also can make target instantaneous short circuit, therefore can also be applicable to being applicable to big current welding or high-speed welding.
In addition, multielectrode gas-shielded electric arc automatic soldering device of the present invention can control automatically in the mode making target become the state of short circuit, therefore, it is possible to be applicable to being applicable to gas shielded arc automatic welding.
Accompanying drawing explanation
Fig. 1 is the sketch of the overview representing multielectrode gas-shielded electric arc automatic soldering device of the present invention.
Fig. 2 is the sketch of the state of the soldered material represented when being welded by multielectrode gas-shielded electric arc automatic soldering device of the present invention.
Fig. 3 is the block diagram of the structure of the target continuous-current plant of the multielectrode gas-shielded electric arc automatic soldering device representing the first embodiment.
Fig. 4 is the block diagram of the structure of the target continuous-current plant of the multielectrode gas-shielded electric arc automatic soldering device representing the second embodiment.
Fig. 5 is the block diagram of the structure of the target continuous-current plant of the multielectrode gas-shielded electric arc automatic soldering device representing the 3rd embodiment.
Detailed description of the invention
Below, suitably with reference to accompanying drawing, the first embodiment for implementing multielectrode gas-shielded electric arc automatic soldering device of the present invention is described in detail to the 3rd embodiment.
" the multielectrode gas-shielded electric arc automatic soldering device of the first embodiment "
Multielectrode gas-shielded electric arc automatic soldering device 100 makes welding position from air partition by gas, and use multiple electrode to carry out the device welded simultaneously.
It should be noted that, as shown in Figure 1, multielectrode gas-shielded electric arc automatic soldering device 100 is applicable to being applicable to horizontal corner connection.Specifically; multielectrode gas-shielded electric arc automatic soldering device 100 these three electrodes of leading electrode 3, subsequent electrode 4 and target 5 are configured as one group along the mode in the bight (welding position) as the lower plate 1 of soldered material and erect plate 2, and along Fig. 1 direction of arrow movement while weld.
In addition; multielectrode gas-shielded electric arc automatic soldering device 100 can also for clip erect plate 2 and by two groups of leading electrodes 3,3, subsequent electrode 4,4, target 5,5 arranged opposite; and make two arrays of electrodes move such structure, thus can weld the bight of the both sides of lower plate 1 and erect plate 2 simultaneously simultaneously.And, can also for configure relative to each erect plate 2 two groups of leading electrodes 3,3, subsequent electrode 4,4, target 5,5, and make the structure of electrode more than two movement simultaneously, thus can weld lower plate 1 and multiple erect plate 2,2 simultaneously.
It should be noted that, for gas, be not particularly limited, the mist etc. for the known gas of gas protective arc welding, such as carbon dioxide, carbon dioxide and inactive gas can be used.
And; as shown in Figure 2; it is (following that multielectrode gas-shielded electric arc automatic soldering device 100 possesses precursor gas shielded arc welding receiving electrode 3; suitably be called leading electrode 3), subsequent gases shielded arc welding receiving electrode 4 (following, to be suitably called subsequent electrode 4), target 5, the dc source L be connected with leading electrode 3, the dc source T be connected with subsequent electrode 4, the target dc source M that is connected with target 5.
The leading electrode of <, subsequent electrode, target >
Leading electrode 3 and subsequent electrode 4 produce electric arc in the front end of each electrode, and are forming motlten metal 8 (molten bath 8) (with reference to Fig. 2) as the lower plate 1 of soldered material and the welding position of erect plate 2.On the other hand, target 5 is inserted in the motlten metal reservoir 10 of motlten metal 8, the generation preventing the magnetic fields such as arc blow from interfering, and makes this motlten metal reservoir 10 stable (with reference to Fig. 2).
It should be noted that, the motlten metal 8 produced by leading electrode 3 and subsequent electrode 4 is solidified and becomes weld metal 7, and lower plate 1 and erect plate 2 are welded by this weld metal 7.Further, welding slag 9 is formed on the surface of weld metal 7.
Leading electrode 3, subsequent electrode 4 and target 5 is sacrificial electrode, is preferably made up of flux-cored wire.By using flux-cored wire, solder flux makes arc stability, therefore, it is possible to obtain good weld part.
It should be noted that, form the composition of the flux-cored wire of each electrode, diameter, each electrode anode-cathode distance, angle etc. be set be not particularly limited, can carry out with the such condition disclosed in Japanese Unexamined Patent Publication 2004-261839 publication.
In addition, feeding speeds control becomes fixed speed to supply to welding position by leading electrode 3, subsequent electrode 4 and target 5.
The dc source of < and leading Electrode connection, the dc source > be connected with subsequent electrode
Dc source L, T are the power supplys supplying electric current to leading electrode 3 or subsequent electrode 4.
Dc source L connects leading electrode 3 on positive pole, and negative pole connects soldered material (lower plate 1 or erect plate 2).Further, dc source T connects subsequent electrode 4 on positive pole, and negative pole connects soldered material (lower plate 1 or erect plate 2).And dc source L and dc source T has constant voltage characteristic.It should be noted that, the power supply of constant voltage characteristic refers to power supply as follows: even if the feeding speed of the sacrificial electrode being controlled to fixed speed and feeding produces the change of feeding speed because of some external disturbance, and then arc voltage is when changing, also automatically make current value increase and decrease and be controlled to fixing voltage all the time, thus be controlled to and can carry out stable arc welding constantly.
The value of the electric current supplied from dc source L and dc source T to leading electrode 3 and subsequent electrode 4 is not particularly limited, and such as, the electric current supplied to leading electrode 3 can be made to be more than 250A, make the electric current supplied to subsequent electrode 4 be more than 200A.
< target dc source >
Target is connect soldered material (lower plate 1 or erect plate 2) at positive pole with dc source M, connects target 5, and have the power supply determining current characteristics at negative pole.It should be noted that, determining except situation that current characteristics refers to except intentionally controlling electric current, even if load voltage increases, electric current also almost indeclinable characteristic.And, as shown in Figure 3, target by from three-phase alternating-current supply 11 input electric power, and possesses rectifier 12, smmothing capacitor 13, inverter 14, transformer 15, rectifier 16, reactor 17, current sensing mechanism 24, error amplifier 25, output control circuit 26 with dc source M.
Three-phase alternating-current supply 11 supplies three-phase alternating current.Further, the three-phase alternating current rectification (conversion) supplied from three-phase alternating-current supply 11 is become direct current by rectifier 12.
Direct current smoothing after smmothing capacitor 13 makes rectifier 12 carry out rectification, that is, make the pulsation (ripple) contained in this direct current become smooth.
Current sensing mechanism 24 detects the electric current flow through in target 5 and soldered material (lower plate 1 or erect plate 2), and is exported to error amplifier 25 by the current detection signal of the detected value representing this electric current.
The error of error amplifier 25 to the current detection signal inputted from current sensing mechanism 24 and the current value setting signal representing the first current value I1 inputted with electric current set mechanism 20 from target or the current value setting signal that represents the second current value I2 is amplified, and exports to output control circuit 26 as current error amplifying signal.
Output control circuit 26 is the circuit according to the current error amplifying signal inputted from error amplifier 25 to inverter 14 output drive signal.
Direct current after smmothing capacitor 13 smoothingization is converted to interchange by inverter 14, and according to the drive singal from output control circuit 26, makes the current variation supplied to target 5.
Transformer 15 carries out transformation to the interchange exported from inverter 14.Further, transformer 15 is carried out the one-tenth of the interchange rectification again (conversion) after transformation direct current by rectifier 16.
Rectifier 16 is carried out the direct current smoothing after rectification by reactor 17, that is, make the pulsation contained in this direct current become smooth.
Further, supplied to target 5 by the electric current after reactor 17 smoothing.
< voltage detection mechanism >
Voltage detection mechanism 18 is the mechanisms of the voltage detected between target 5 and soldered material (lower plate 1 or erect plate 2).Further, the voltage signal detected exports to short circuit decision mechanism 19 by voltage detection mechanism 18.
< short circuit decision mechanism >
Short circuit decision mechanism 19 judges whether the voltage signal inputted from voltage detection mechanism 18 exceedes the mechanism of setting.Further, its result of determination exports to target electric current set mechanism 20 (current settings selection circuit 23) by short circuit decision mechanism 19.
At this, setting is that the magnitude of voltage of state for being short-circuited to target 5 and target 5 are not short-circuited and produce the threshold value that the state of electric arc or non-loaded magnitude of voltage distinguish.And, the state or the non-loaded magnitude of voltage (magnitude of voltage between target 5 and soldered material) that produce electric arc in order to can not be short-circuited to the magnitude of voltage of the state that target 5 is short-circuited (magnitude of voltage between target 5 and soldered material) and target 5 are distinguished, and setting is the value between above-mentioned two magnitudes of voltage, such as, 10 ~ 15V is preferably.It should be noted that, short circuit decision mechanism 19 can also be formed as can inputting setting from outside.
In addition, as long as have the short circuit decision mechanism of known short circuit decision method.
Such as, when being set to a threshold value, when the voltage of Near Threshold, repeatedly carrying out the judgement of short circuit with the short period and be not the judgement of short circuit.It is never that the state of short circuit is to becoming the threshold value of short circuit and not being these two threshold values of threshold value of short circuit from being the state of short circuit to becoming that preferred setting has.
In addition, the magnitude of voltage of the state that target 5 is short-circuited also changes because of the electric current flow through in target, therefore threshold value can be changed according to the electric current flow through.
And, by the logical combination compared multiple voltage signal and multiple setting, wherein, this multiple voltage signal makes the voltage signal inputted from voltage detection mechanism 18 noise contribution removing be obtained by multiple filter circuits that cut-off frequency is different, even if thus when short circuit decision mechanism 19 with interelectrode distance long and be difficult to distinguish whether short circuit because of noise, also can judge immediately.
< target electric current set mechanism >
Target electric current set mechanism 20 is the results based on inputting from short circuit decision mechanism 19, sets the mechanism of the electric current supplied from target dc source M to target 5.Further, as shown in Figure 3, target electric current set mechanism 20 possesses the first current setting circuit 21, second current setting circuit 22, current settings selection circuit 23.
First current setting circuit 21 is the circuit of the current value signals setting expression first current value I1.In addition, the second current setting circuit 22 is the circuit of the current value signals setting expression second current value I2.
First current setting circuit 21 and the second current setting circuit 22 are by the current value signals of expression first current value I1 or represent that the current value signals of the second current value I2 exports to current settings selection circuit 23.It should be noted that, the first current setting circuit 21 can also input the first current value I1 from outside.On the other hand, the second current setting circuit 22 also can input the second current value I2 from outside.
First current value I1 is the value that the melting amount of the target 5 making to be caused by Joule heat and the feeding amount of target 5 become identical amount (melting speed and feeding speed are identical speed), or the value that the melting amount of the target 5 to the insertion defect in molten bath 8, the feeding amount of target 5 being caused than Joule heat in order to avoid target 5 is a little.Therefore, the first current value I1 can calculate according to the composition of target 5, diameter, feeding amount (or feeding speed) etc., or is obtained by prior experiment.Such as, the first current value I1 is 50 ~ 150A.
Second current value I2 is the current value less than the first current value I1.Such as, the current value of below 15A is preferably.
Current settings selection circuit 23 is the results based on inputting from short circuit decision mechanism 19, using any one current value signals of the expression first current value I1 inputted from the first current setting circuit 21 or the current value signals of expression second current value I2 that inputs from the second current setting circuit 22 as current value setting signal to the circuit that the error amplifier 25 of target dc source M exports.
Specifically, when the result that the state of the result inputted from short circuit decision mechanism 19 to be target 5 be short circuit is such, the current value signals of the expression first current value I1 inputted from the first current setting circuit 21 exports as current value setting signal to error amplifier 25 by current settings selection circuit 23.
On the other hand, when the result inputted from short circuit decision mechanism 19 is target 5 for not being short-circuited and producing the such result of the state of electric arc, the current value signals of the expression second current value I2 inputted from the second current setting circuit 22 exports as current value setting signal to error amplifier 25 by current settings selection circuit 23.
It should be noted that, also can for the first current value I1 and the second current value I2 be inputted such structure from outside directly to current settings selection circuit 23.In this case, the first current setting circuit 21 and the second current setting circuit 22 is not needed.
< electrode feeding mechanism >
Electrode feeding mechanism 27 is the mechanisms fed to welding position with fixing speed by target 5.Further, as shown in Figure 3, electrode feeding mechanism 27 possesses electrode feeding motor 30, electrode feed roller 31.
The assigned position of target 5 to the surface of soldered material feeds via electrode feed roller 31 by electrode feeding motor 30.This electrode feed roller 31 can use the mechanism be such as made up of two rollers configured in the mode sandwiching target 5.
< speed control mechanism >
Speed control mechanism 32 is mechanisms target 5 being controlled to fixing speed.Further, as shown in Figure 3, electrode feeding speed setter 28 and electrode feeding electromotor control circuit 29 is possessed.
Electrode feeding speed setter 28 will represent that the feeding rate signal of the feeding speed of the electrode preset exports to electrode feeding electromotor control circuit 29.It should be noted that, electrode feeding speed setter 28 can input feeding speed from outside.
Electrode feeding electromotor control circuit 29 is the circuit carrying out control electrode feeding motor 30 based on the feeding rate signal inputted from electrode feeding speed setter 28.
It should be noted that, the feeding speed of electrode is not particularly limited, and is preferably 1 ~ 3m/min.
" the multielectrode gas-shielded electric arc automatic soldering device of the second embodiment "
As shown in Figure 4; the multielectrode gas-shielded electric arc automatic soldering device 100 of the second embodiment still can possess the target auxiliary DC power supply 33 with high-impedance behavior; this target auxiliary DC power supply 33 is connected in parallel with target dc source M; and connect soldered material (lower plate 1 or erect plate 2) at positive pole, connect target 5 at negative pole.
It should be noted that, the target auxiliary DC power supply 33 with high-impedance behavior is the object of the voltage detected between target 5 and soldered material (lower plate 1 or erect plate 2) and the power supply arranged, and is do not supply in fact the power supply with atomic little electric current supply ability making the such electric current of target 5 melting.In addition, even if also flow only through the characteristic of the high impedance of extremely small electric current when high-impedance behavior refers to and has output circuit short circuit.
Further, preferably this target auxiliary DC power supply 33 has the output characteristics that short circuit current is below 1A.Owing to supplying electric current from target auxiliary DC power supply 33 hardly to target 5, therefore only supply electric current from target dc source M to target 5.That is, this is owing to suitably can control the electric current supplied to target 5.
By possessing the target auxiliary DC power supply 33 of high impedance, thus when target 5 is not short-circuited and becomes the state producing electric arc, for target 5, in order to become the second current value electric current cannot pilot arc and produce electric arc interrupt, thus the output of target dc source M is when stopping in fact or when making output stop, voltage detection mechanism 18 all detects the high voltage that this target auxiliary DC power supply 33 shows.Consequently, short circuit decision mechanism 19 voltage when producing above-mentioned state is not short-circuited with target and the state that produces electric arc or produce non-load voltage situation in the same manner as be judged as not being short-circuited.
Therefore, the voltage of target auxiliary DC power supply 33 is the value of the magnitude of voltage (magnitude of voltage between target 5 and soldered material) exceeding the state that target 5 is short-circuited, such as, be preferably more than 15V.
And, the current value signals of the expression first current value I1 inputted from the first current setting circuit 21 or the current value signals of expression second current value I2 that inputs from the second current setting circuit 22, based on the result inputted from short circuit decision mechanism 19, export as current value setting signal to error amplifier 25 by current settings selection circuit 23.
Specifically, when the result inputted from short circuit decision mechanism 19 is target 5 for result that the state that is short-circuited is such, the current value signals of the expression first current value I1 inputted from the first current setting circuit 21 exports as current value setting signal to error amplifier 25 by current settings selection circuit 23.
On the other hand, when the result that the result inputted from short circuit decision mechanism 19 state that to be target 5 be is not short-circuited is such, the current value signals of the expression second current value I2 inputted from the second current setting circuit 22 exports as current value setting signal to error amplifier 25 by current settings selection circuit 23.
It should be noted that, the second current value I2 can be the value same with the second current value of the first embodiment, but also can be 0A.That is, the supply of the electric current from target dc source M can be stopped to target 5.This is because the multielectrode gas-shielded electric arc automatic soldering device 100 of the second embodiment possesses target auxiliary DC power supply 33; even if therefore stop the supply of the electric current from target dc source M to target 5, also supply from target auxiliary DC power supply 33 pairs of targets 5 voltage detected.
Other structure is identical with the multielectrode gas-shielded electric arc automatic soldering device 100 of the first embodiment, therefore omits the description.
" the multielectrode gas-shielded electric arc automatic soldering device of the 3rd embodiment "
The multielectrode gas-shielded electric arc automatic soldering device 100 of the 3rd embodiment as shown in Figure 5, target continuous-current plant m can for have concentrated voltage detection mechanism 18 in a framework, short circuit decision mechanism 19, target electric current set mechanism 20, speed control mechanism 32, the target structure of dc source M, this voltage detection mechanism 18 detects the voltage between target 5 and soldered material, this short circuit decision mechanism 19 is transfused to the voltage detected by voltage detection mechanism 18, determine whether short circuit, this target electric current set mechanism 20 is when short circuit decision mechanism 19 is judged to be short circuit, select the current value signals of expression first current value I1, when short circuit decision mechanism 19 is judged to be non-short circuit, select to represent the current value signals of the second current value I2 less than the first current value I1, this speed control mechanism 32 makes the feeding of target 5 be fixing speed, this target dc source M has and determines current characteristics.Other structure is identical with the multielectrode gas-shielded electric arc automatic soldering device 100 of the first embodiment, therefore omits the description.
" action of the Current Control of target "
Below, the action of the Current Control of target is described (suitably with reference to Fig. 3).
First, voltage detection mechanism 18 detects the voltage of soldered material (lower plate 1 or erect plate 2) and target 5, and is exported to short circuit decision mechanism 19 by the voltage signal detected.
Then, short circuit decision mechanism 19 determines whether short circuit according to the voltage signal being detected input by voltage detection mechanism 18, and this result of determination is exported to target electric current set mechanism 20.
Then, when have input short circuit decision mechanism 19 and being judged as the result of short circuit, will represent that the current value signals of the first current value I1 exports as current value setting signal to target dc source M from target electric current set mechanism 20.On the other hand, when have input short circuit decision mechanism 19 and being judged as the result of non-short circuit, will represent that the current value signals of the second current value I2 exports as current value setting signal to target dc source M from target electric current set mechanism 20.
Target dc source M is controlled to the mode that target 5 supplies to make the electric current of the current value setting signal exported from target electric current set mechanism 20.
Above, embodiments of the present invention are illustrated, but the present invention is not defined as above-mentioned embodiment, suitably can carries out design alteration in the scope not departing from the purport of the present invention described in claims.
[symbol description]
1 lower plate (soldered material)
2 erect plates (soldered material)
3 precursor gas shielded arc welding receiving electrodes (leading electrode)
4 subsequent gases shielded arc welding receiving electrodes (subsequent electrode)
5 targets
6 distribution boards
7 weld metals
8 motlten metals (molten bath)
9 welding slags
10 motlten metal reservoirs
11 three-phase alternating-current supplies
12 rectifiers
13 smmothing capacitors
14 inverters
15 transformers
16 rectifiers
17 reactors
18 voltage detection mechanism
19 short circuit decision mechanisms
20 targets electric current set mechanism
21 first current setting circuits
22 second current setting circuits
23 current settings selection circuits
24 current sensing mechanism
25 error amplifiers
26 output control circuits
27 electrode feeding mechanisms
28 electrode feeding speed setters
29 electrode feeding electromotor control circuits
30 electrode feeding motor
31 electrode feed roller
32 speed control mechanisms
33 target auxiliary DC power supplies
L dc source (with the dc source of leading Electrode connection)
T dc source (dc source be connected with subsequent electrode)
M target dc source
M target continuous-current plant
I1 first current value
I2 second current value
Claims (4)
1. a multielectrode gas-shielded electric arc automatic soldering device; it possesses precursor gas shielded arc welding receiving electrode and subsequent gases shielded arc welding receiving electrode; also between this precursor gas shielded arc welding receiving electrode and this subsequent gases shielded arc welding receiving electrode, possesses target; and this precursor gas shielded arc welding receiving electrode, this subsequent gases shielded arc welding receiving electrode and this target are sacrificial electrode; the feature of described multielectrode gas-shielded electric arc automatic soldering device is to possess:
Two dc sources, they connect respectively with the described precursor gas shielded arc welding receiving electrode of fixing speed feeding and described subsequent gases shielded arc welding receiving electrode at positive pole respectively, connect soldered material, and have constant voltage characteristic at negative pole;
Target dc source, it connects described soldered material at positive pole, connects described target at negative pole, and has and determine current characteristics;
Voltage detection mechanism, it detects the voltage between described target and described soldered material;
Short circuit decision mechanism, it is transfused to the voltage detected by described voltage detection mechanism, determines whether short circuit;
Target electric current set mechanism, it is by from outside input current value signal, and when described short circuit decision mechanism is judged to be short circuit, the current value signals of expression first current value is exported as current value setting signal to described target dc source, and when described short circuit decision mechanism is judged to be non-short circuit, will represent that the current value signals of second current value less than described first current value exports as current value setting signal to described target dc source;
Speed control mechanism, it makes the feeding speed of described target be fixing speed;
Electrode feeding mechanism, described target feeds towards described soldered material by it;
Target auxiliary DC power supply, itself and described target dc source are connected in parallel, and connect described soldered material at positive pole, connect described target, and have high-impedance behavior at negative pole.
2. multielectrode gas-shielded electric arc automatic soldering device according to claim 1, is characterized in that,
Described target auxiliary DC power supply has the output characteristics that short circuit current is below 1A.
3. multielectrode gas-shielded electric arc automatic soldering device according to claim 1 and 2, is characterized in that,
Concentrate in a framework and possess described voltage detection mechanism, described short circuit decision mechanism, described target electric current set mechanism, described speed control mechanism, described target dc source.
4. multielectrode gas-shielded electric arc automatic soldering device according to claim 1 and 2, is characterized in that,
Described multielectrode gas-shielded electric arc automatic soldering device is applicable to horizontal corner connection.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2011030519A JP5634911B2 (en) | 2011-02-16 | 2011-02-16 | Multi-electrode gas shield arc automatic welding equipment |
| JP2011-030519 | 2011-12-28 | ||
| PCT/JP2012/051977 WO2012111414A1 (en) | 2011-02-16 | 2012-01-30 | Automatic multi-electrode gas shielded arc welding device |
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| Publication Number | Publication Date |
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| CN103347638A CN103347638A (en) | 2013-10-09 |
| CN103347638B true CN103347638B (en) | 2016-01-20 |
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| CN201280007520.4A Active CN103347638B (en) | 2011-02-16 | 2012-01-30 | Multielectrode gas-shielded electric arc automatic soldering device |
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| Country | Link |
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| JP (1) | JP5634911B2 (en) |
| KR (1) | KR101533178B1 (en) |
| CN (1) | CN103347638B (en) |
| WO (1) | WO2012111414A1 (en) |
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| CN103286420B (en) * | 2013-05-30 | 2015-06-03 | 唐山松下产业机器有限公司 | Electric arc welder and electric arc welding short-circuit determining method |
| JP5974984B2 (en) | 2013-06-07 | 2016-08-23 | 株式会社安川電機 | Arc welding apparatus, arc welding system, and arc welding method |
| CN105081537A (en) * | 2014-05-08 | 2015-11-25 | 株式会社神户制钢所 | Four-electrode single-sided and single-layered submerged-arc welding method |
| US10040096B2 (en) | 2015-07-17 | 2018-08-07 | Caterpillar Inc. | Abrasion resistant material tandem welding |
| JP7243395B2 (en) | 2019-04-02 | 2023-03-22 | 中国電力株式会社 | Edge cutting method |
| JP7265308B2 (en) * | 2019-08-30 | 2023-04-26 | 株式会社ダイヘン | welding equipment |
| EP3789150A1 (en) * | 2019-09-04 | 2021-03-10 | FRONIUS INTERNATIONAL GmbH | Method and device for conducting a multiple welding method |
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| JP2000176641A (en) * | 1998-12-14 | 2000-06-27 | Daihen Corp | Tig welding equipment |
| JP2002219571A (en) * | 2001-01-19 | 2002-08-06 | Daihen Corp | Control method for three electrode arc welding |
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| CN100589914C (en) * | 2006-08-01 | 2010-02-17 | 株式会社神户制钢所 | Multiple electrode gas protection arc welding method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP3117287B2 (en) * | 1992-06-11 | 2000-12-11 | 三菱重工業株式会社 | Consumable electrode arc welding method |
| JP2004268123A (en) * | 2003-03-11 | 2004-09-30 | Toshiba Plant Systems & Services Corp | Power unit for welding |
| JP4964025B2 (en) * | 2006-08-01 | 2012-06-27 | 株式会社神戸製鋼所 | Multi-electrode gas shielded arc welding method |
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- 2011-02-16 JP JP2011030519A patent/JP5634911B2/en active Active
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000176641A (en) * | 1998-12-14 | 2000-06-27 | Daihen Corp | Tig welding equipment |
| JP2002219571A (en) * | 2001-01-19 | 2002-08-06 | Daihen Corp | Control method for three electrode arc welding |
| JP2004261839A (en) * | 2003-02-28 | 2004-09-24 | Kobe Steel Ltd | Multiple electrode gas shielded arc welding method |
| CN100589914C (en) * | 2006-08-01 | 2010-02-17 | 株式会社神户制钢所 | Multiple electrode gas protection arc welding method |
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| KR20130125806A (en) | 2013-11-19 |
| JP5634911B2 (en) | 2014-12-03 |
| WO2012111414A1 (en) | 2012-08-23 |
| CN103347638A (en) | 2013-10-09 |
| KR101533178B1 (en) | 2015-07-01 |
| JP2012166249A (en) | 2012-09-06 |
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