CN103317209A - Electric arc welding device - Google Patents
Electric arc welding device Download PDFInfo
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- CN103317209A CN103317209A CN2013100757375A CN201310075737A CN103317209A CN 103317209 A CN103317209 A CN 103317209A CN 2013100757375 A CN2013100757375 A CN 2013100757375A CN 201310075737 A CN201310075737 A CN 201310075737A CN 103317209 A CN103317209 A CN 103317209A
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Abstract
The invention provides an electric arc welding device, which can be guided in a way to keep the moving speed of a welding torch within a reasonable range during a manual electric arc welding process. The electric arc welding device comprises a three-shaft acceleration sensor (DS) arranged on the welding torch (4); a moving speed calculation part (ST) integrating the acceleration signals (Dx-Dz) of each shaft of the three-shaft acceleration sensor (DS) during an electric arc (3) ignition process and further synthesizing the integrated signals to calculate the moving speed signals (St) of the welding torch; and an alarm generation part (KH1) emitting an alert (Kh1) when the moving speed signal (St) value in a stable state is beyond a reasonable range. In this way, a welding operator can be guided by the alarm and make the welding torch moving speed within a reasonable range.
Description
Technical field
The present invention relates to can be in manual welding with the arc-welding apparatus of translational speed guiding in OK range of welding torch.
Background technology
In the arc welding of non-consumable electrode (consuming Electricity Very) arc welding, consutrode arc welding, plasma-arc welding etc., behind the thickness of slab of having set mother metal, seam shape, welding etc., the translational speed of welding torch is that the desired value of speed of welding is determined.Therefore, in the situation of the automatic welding of robot welding etc., as long as speed of welding is set as desired value, welding torch just can correctly move according to the speed of setting.
On the other hand, grip with hand the weld job person in the situation of the manual welding that welding torch carries out, can correctly speed of welding be maintained desired value and be subject to about separately technical ability.In skilled weld job person's situation, speed of welding can be maintained desired value by long-term experience and technical ability and weld.But, in the situation that is not skilled weld job person, be difficult to speed of welding is maintained desired value.
In the invention of patent documentation 1, the 1st and the 2nd detector with the sealing wire parallel is set.The 2nd detector moves at the predetermined distance rear of the 1st detector.After the 1st and the 2nd detector detects light or heat from electric arc, the output alarm.Electric arc is produced the weld job person and during beginning welding torch mobile, the 1st and the 2nd detector also begins movement with the speed corresponding with predetermined speed of welding.In the situation that welding torch is between the 1st detector and the 2nd detector, the translational speed of welding torch is roughly the same with the speed of welding that sets.If the translational speed of welding torch accelerates, then owing to having approached the 1st detector, therefore the 1st detector detects from the light of electric arc or heat and sends the 1st alarm.The weld job person accepts the 1st alarm and recognizes that translational speed is too fast, thereby reduces translational speed.Otherwise if the translational speed of welding torch is slack-off, then because near the 2nd detector, therefore the 2nd detector detects from the light of electric arc or heat and sends the 2nd alarm.The weld job person accepts the 2nd alarm and recognizes that translational speed is excessively slow, thereby accelerates translational speed.So, in the invention of patent documentation 1, the translational speed with welding torch maintained played support in the OK range.
In the invention of patent documentation 2, in robot welding, at welding torch acceleration transducer is set, acceleration signal from this acceleration transducer is carried out integration calculate velocity wave form, further carry out integration as the basis take this velocity wave form and calculate the position waveform, calculate the correct trochoidal wave form (weaving wave) of welding torch based on this position waveform.
Patent documentation
Patent documentation 1:JP JP 52-126656 communique
Patent documentation 2:JP JP 2008-80343 communique
In the invention of above-mentioned patent documentation 1, can support so that the translational speed of welding torch maintains desired value.But, the special device that need to the 1st and the 2nd detector be moved with sealing wire, because arranging of this device needs the time, the problem that therefore exists production efficiency to reduce.
Summary of the invention
Therefore, in the present invention, purpose is to provide a kind of arc-welding apparatus, can support not reduce production efficiency ground in manual arc welding the translational speed of welding torch is maintained in the OK range.
In order to solve above-mentioned problem, the invention of technical scheme 1 is a kind of arc-welding apparatus, possess: the source of welding current of output welding current and weldingvoltage and accept described welding current and described weldingvoltage come and mother metal between the welding torch of electric arc occurs, described arc-welding apparatus is characterised in that, possess: 3 axle acceleration sensors, it is arranged at described welding torch; The translational speed calculating section, it carries out integration to the acceleration signal from each axle of described 3 axle acceleration sensors when described electric arc scratch start, and synthetic these integrated signals are calculated the translational speed signal of described welding torch; With the 1st alarm generating unit, when the value of its described translational speed signal under stable state is in outside the fixing speed scope, the 1st alarm occurs.
The arc-welding apparatus that the invention of technical scheme 2 is put down in writing according to technical scheme 1, be characterised in that, described arc-welding apparatus also possesses: the 2nd alarm generating unit, the rate of change of its described translational speed signal behind described electric arc scratch start is that the time span between initial stage more than predetermined the 1st a reference value is outside the stipulated time scope time, and the 2nd alarm occurs.
The arc-welding apparatus that the invention of technical scheme 3 is put down in writing according to technical scheme 1 or 2, be characterised in that, described arc-welding apparatus also possesses: the 3rd alarm generating unit, its time point that arrives predetermined dwell time in the elapsed time of lighting from the time of described electric arc scratch start sends the 3rd alarm.
The invention of technical scheme 4 is according to each arc-welding apparatus of putting down in writing in the technical scheme 1 to 3, be characterised in that, the alarm song of different frequency occurs in described the 1st alarm generating unit when the value of described translational speed signal surpasses the higher limit of described velocity interval and during the lower limit of not enough described velocity interval.
The invention of technical scheme 5 is according to each arc-welding apparatus of putting down in writing in the technical scheme 1 to 4, be characterised in that, with the described stable state of described the 1st alarm generating unit be made as elapsed time from the scratch start of described electric arc be more than predetermined fiducial time during.
The invention of technical scheme 6 is according to each arc-welding apparatus of putting down in writing in the technical scheme 1 to 4, be characterised in that, the rate of change that the described stable state of described the 1st alarm generating unit is made as described translational speed signal from described electric arc scratch start from the state initial change more than predetermined the 2nd a reference value for the time point of the state of not enough described the 2nd a reference value later during.
The invention of technical scheme 7 is according to each arc-welding apparatus of putting down in writing in the technical scheme 1 to 6, be characterised in that, described arc-welding apparatus also possesses: the Current Control configuration part, its value according to the described translational speed signal under the described stable state changes the value of described welding current.
The invention effect
According to the present invention, when the translational speed of welding torch is in outside the fixing speed scope, the alarm that sounds the alarm etc.The weld job person can be guided the translational speed with welding torch to operate in the above-mentioned velocity interval by this alarm.In addition, in order to give the alarm, therefore preparation and busy work in welding before not needing to weld can not reduce production efficiency yet.Therefore, in the present invention, in manual arc welding, can not reduce production efficiency, can maintain in the OK range the translational speed with welding torch and support.
Description of drawings
Fig. 1 is the block diagram of the related arc-welding apparatus of embodiments of the present invention 1.
Fig. 2 is the sequential chart of each signal of the arc-welding apparatus of Fig. 1.
Fig. 3 is the block diagram of the related arc-welding apparatus of embodiments of the present invention 2.
Fig. 4 is the sequential chart of each signal of the arc-welding apparatus of Fig. 3.
Symbol description
1 electrode
2 mother metals
3 electric arcs
4 welding torches
The CD judging circuit of switching on
The Cd judgment signal of switching on
The DS acceleration transducer
DST translational speed rate of change is calculated circuit
Dst translational speed rate of change signal
The axial acceleration signal of Dx x
The axial acceleration signal of Dy y
The axial acceleration signal of Dz z
ID welding current testing circuit
The Id current detection signal
The IR current setting circuit
Ir current settings signal
The Iw welding current
KH1 the 1st alarm circuit for generating
Kh1 the 1st alarm signal
KH2 the 2nd alarm circuit for generating
Kh2 the 2nd alarm signal
KH3 the 3rd alarm circuit for generating
Kh3 the 3rd alarm signal
ON welding torch switch
On welds commencing signal
PL abnormal show circuit for lamp
The PS source of welding current
SD sound output circuit
The Sd audible signal
SR speed of welding initialization circuit
Sr speed of welding setting signal
The ST translational speed is calculated circuit
St translational speed (signal)
The axial translational speed of Sx x
The axial translational speed of sy y
The axial translational speed of Sz z
The Ts dwell time
The Vw weldingvoltage
The specific embodiment
Below, with reference to accompanying drawing embodiments of the present invention are described.
[embodiment 1]
The following describes according to the method for calculating translational speed from the acceleration signal of 3 axle acceleration sensors that are arranged on welding torch.To be made as respectively Dx, Dy and Dz from the acceleration signal of x axle, y axle and z axle.If as shown in the formula like that these acceleration signals being carried out integration, then can calculate each axial speed Sx, Sy and Sz.
Sx＝∫Dx·dt
Sy＝∫Dy·dt
Sz＝∫Dz·dt
These integrations from the time by scratch start (welding current energising) of electric arc light until weld finish during carry out.
As shown in the formula like that each axial speed Sx, Sy and the Sz that calculates being synthesized, thereby calculate the translational speed St of welding torch.
St=(Sx
2+ Sy
2+ Sz
2)
1/2(1) formula
Therefore, as long as use (1) formula of being somebody's turn to do, just the acceleration signal Dx～Dz of each axle can be calculated the translational speed St of welding torch as input.
Fig. 1 is the block diagram of the related arc-welding apparatus of embodiments of the present invention 1.Fig. 1 is that arc-welding apparatus is the situation of non-consumable electrode arc-welding apparatus, but the situation of consutrode arc-welding apparatus and plasma-arc welder is also identical.Below, come each module is described with reference to Fig. 1.
Current setting circuit IR exports predetermined current settings signal Ir.Source of welding current PS is the source of welding current that the general non-consumable electrode arc welding with constant-current characteristic is used, with welding commencing signal On described later and above-mentioned current settings signal Ir as input, the welding current Iw that output is set by current settings signal Ir when welding commencing signal On becomes high level.The electric arc 3 that between the electrode 1 of the tungsten of the front end that is installed in welding torch 4 etc. and mother metal 2 welding current Iw energising occurs and obtain applies weldingvoltage Vw.In order to make the electric arc scratch start high-frequency high-voltage is overlapped onto among the weldingvoltage Vw, but this high-frequency high-voltage circuit for generating is omitted diagram.
Be provided with the acceleration transducer DS of 3 axles at welding torch 4.The axial acceleration signal Dx of this acceleration transducer DS output x, the axial acceleration signal Dy of y and the axial acceleration signal Dz of z.These acceleration signals Dx～Dz exports after detecting and being added in each axial acceleration.
Welding torch switch ON is arranged at welding torch 4, and when the weld job person connected welding torch switch ON, the welding commencing signal On that will become high level exported to above-mentioned source of welding current PS.Source of welding current PS starts when this welding commencing signal On becomes high level.Welding current testing circuit ID detects above-mentioned welding current Iw and output electric current measure signal Id.Energising judging circuit CD with this current detection signal Id as input, this value become predetermined threshold value when above output become the energising judgment signal Dc of high level.Threshold is about 1A, so that can differentiate welding current Iw energising.Energising judgment signal Cd is when having produced electric arc 3 when being high level.
Translational speed calculate circuit ST with the acceleration signal Dx～Dz of each above-mentioned axle and above-mentioned energising judgment signal Cd as input, when energising judgment signal Cd is changed to high level (energising), calculate the translational speed signal St of welding torch 4 based on above-mentioned (1) formula.The translational speed rate of change is calculated circuit DST take this translational speed signal St as input, calculates its rate of change (differential value), and exports as translational speed rate of change signal Dst.
The 3rd alarm circuit for generating KH3 with above-mentioned energising judgment signal Cd as input, light through the time point behind the predetermined dwell time Ts in the time that is changed to high level (energising) from energising judgment signal Cd, output becomes the 3rd alarm signal Kh3 of short time high level.The weld job person from electric arc 3 scratch starts and welding current Iw begin to switch on until form suitable molten bath (molten pool), welding torch 4 is stopped.This time that welding torch 4 is stopped to be equivalent to above-mentioned dwell time Ts.
The 2nd alarm circuit for generating KH2 with above-mentioned translational speed rate of change signal Dst and above-mentioned energising judgment signal Cd as input, length during the value that is changed to translational speed rate of change signal Dst the high level (energising) from energising judgment signal Cd is initial more than predetermined the 1st a reference value is outside the stipulated time scope time, exports the 2nd alarm signal Kh2 that becomes high level.The 1st a reference value is to be halted state or constant speed state for differentiating welding torch 4, is acceleration mode or the threshold value of deceleration regime.Above-mentioned from energising judgment signal Cd be changed to high level (energising) thus the value of translational speed rate of change signal Dst be refer to during initial more than the 1st a reference value electric arc scratch start be passed to from the state that stops welding torch 4 constant speed state acceleration mode during.Abnormal show circuit for lamp PL as input, lights the abnormal show lamp with the 2nd alarm signal Kh2 when the 2nd alarm signal Kh2 is high level.
Speed of welding initialization circuit SR output is used for setting the predetermined speed of welding setting signal Sr of suitable speed of welding.The 1st alarm circuit for generating KH1 is with this speed of welding setting signal Sr, above-mentioned translational speed signal St and above-mentioned translational speed rate of change signal Dst are as input, according in the value from translational speed rate of change signal Dst be state variation more than predetermined the 2nd a reference value be the time point of state of less than the 2nd a reference value later during (stable state), when the value of translational speed signal St surpasses the higher limit of the fixing speed scope of setting based on speed of welding setting signal Sr, its value becomes 1, when the lower limit of the above-mentioned fixing speed scope of deficiency, its value becomes 2, in the time of in the afore mentioned rules velocity interval, its value becomes 0 mode and exports the 1st alarm signal Kh1.The 2nd a reference value can be the value identical with the 1st above-mentioned a reference value basically.
As input, output is used for when the 3rd alarm signal Kh3 is high level sound output circuit SD with the 3rd above-mentioned alarm signal Kh3 and above-mentioned the 1st alarm signal Kh1, the sound Sd of the sound of the different frequency of ringing respectively during the 1st alarm signal Kh1=1 or during the 1st alarm signal Kh1=2.It is in order to distinguish the kind of alarm by sound that the frequency of sound Sd is made as different values.
Also can be with above-mentioned current setting circuit IR, above-mentioned welding current testing circuit ID, above-mentioned energising judging circuit CD, above-mentioned translational speed is calculated circuit ST, above-mentioned translational speed rate of change is calculated circuit DST, the 3rd above-mentioned alarm circuit for generating KH3, the 2nd above-mentioned alarm circuit for generating KH2, above-mentioned abnormal show circuit for lamp PL, above-mentioned speed of welding initialization circuit SR, the 1st above-mentioned alarm circuit for generating KH1, above-mentioned sound output circuit SD is built among the above-mentioned source of welding current PS.In addition, also these circuit can be built in other the independently sound generator.
Fig. 2 is the sequential chart by each signal of the described arc-welding apparatus of Fig. 1.Fig. 2 (A) expression welding commencing signal On, Fig. 2 (B) expression welding current Iw, Fig. 2 (C) expression energising judgment signal Cd, Fig. 2 (D) expression translational speed signal St, Fig. 2 (E) expression translational speed rate of change signal Dst, Fig. 2 (F) represents the 3rd alarm signal Kh3, Fig. 2 (G) represents the 2nd alarm signal Kh2, Fig. 2 (H) represents the 1st alarm signal Kh1, Fig. 2 (I) expression sound Sd.Describe below with reference to Fig. 2.
At moment t0, when the weld job person connected welding torch switch ON, shown in Fig. 2 (A), welding commencing signal On was changed to high level.Servo-actuated in this, the source of welding current PS of Fig. 1 starts, thereby applies the weldingvoltage Vw of non-load voltage value between electrode 1 and mother metal 2, will overlap weldingvoltage Vw for the high-frequency high-voltage that makes electric arc 3 scratch starts.Welding torch 4 is until the state of moment t2 for stopping.And electrode 1 maintains desired value until weld end with the distance (height of welding torch) of mother metal 2 from moment t0.
At moment t1, when electric arc 3 scratch start, shown in Fig. 2 (B), the welding current Iw of the value that the current settings signal Ir by Fig. 1 sets begins energising.Servo-actuated in this, shown in Fig. 2 (C), energising judgment signal Cd is changed to high level.
Moment t2 after the moment t1 that is changed to high level from energising judgment signal Cd has passed through predetermined dwell time Ts, shown in Fig. 2 (F), the 3rd alarm signal Kh3 becomes the high level of short time.Servo-actuated in this, shown in figure (I), the sound Sd of output short time, " Pi-" the such alarm song of ringing for example shortlyer.When the weld job person hears this alarm song, the movement to welding direction of beginning welding torch 4.Servo-actuated in this, shown in Fig. 2 (D), translational speed signal St accelerates from moment t2 gradually, converges to the St1 of constant speed state at moment t3, until t4 continues this state constantly.Shown in Fig. 2 (E), translational speed rate of change signal Dst until constantly t2 all be 0, curve-like ground increase from moment t2 becomes peak value at the interlude point of moment t2～moment t3, curve-like ground reduces afterwards, t3 turns back to 0 in the moment.
The 2nd alarm circuit for generating KH2 of Fig. 1 detects the time span that translational speed rate of change signal Dst becomes the above transition period (roughly during moment t2～t3) of the 1st a reference value of being a bit larger tham 0 value, and at the appointed time whether this time span differentiated in the scope.During this transition period translational speed signal St is just changing, be from the movement of beginning welding torch 4 until between the transition region of constant speed state.Among Fig. 2, the time span of this transition period is shorter than the stipulated time scope, is to be in extraneous situation of stipulated time.Thus, at moment t3, shown in Fig. 2 (G), the 2nd alarm signal Kh2 is changed to high level, and keeps this state.The abnormal show lamp PL of Fig. 1 lighted when the 2nd alarm signal Kh2 was changed to high level.Above-mentioned the 2nd alarm circuit for generating KH2 differentiates from the movement of beginning welding torch 4 until whether become the transition period of constant speed state suitable.Between this transition region no matter all might cause the welding quality variation than OK range (stipulated time scope) is long or short.Therefore, when being in outside the OK range between transition region, by sending the alarm of lighting abnormal show lamp etc., the weld job person can recognize this differentiation result.Thus, the weld job person can take full advantage of this differentiation result in the welding of next time.The afore mentioned rules time range is set as the time span of the transition period that welding quality can variation.
The 1st alarm circuit for generating KH1 of Fig. 1 with the value of the translational speed rate of change signal Dst shown in Fig. 2 (E) from the time point that drops to less value greater than the value than the 2nd a reference value (also can be the value identical with the 1st a reference value) of 0 slightly large value (roughly constantly t3) later during differentiate and be stable state.In addition, also the elapsed time that electric arc 3 scratch starts in moment t1 rise can be arrived after predetermined fiducial time during differentiate and be stable state.That is the condition discrimination that, the value of the translational speed signal St shown in Fig. 2 (D) is converged to constant speed state through transition period is stable state.In Fig. 2, the value of the translational speed signal St under the stable state of t3～t4 becomes St1 constantly.Then, whether the 1st alarm circuit for generating KH1 differentiates this translational speed St1 and is in the fixing speed scope.That is, during faster than the higher limit of fixing speed scope, output becomes 1 alarm signal Kh1 to the 1st alarm circuit for generating KH1 at translational speed St1, and when being slower than lower limit, output becomes 2 the 1st alarm signal Kh1.In Fig. 2, be made as translational speed St1 faster than the situation of the higher limit of fixing speed scope.For this reason, shown in Fig. 2 (H), the 1st alarm signal Kh becomes 1 (being shown as high level) in during moment t3～t5.Servo-actuated in this, shown in Fig. 2 (I), during moment t3～t5 in output audible signal Sd, the therewith sound of corresponding frequency of ringing.
The weld job person hears this alarm song, and recognizes that the translational speed St1 of welding torch 4 is faster than the higher limit of fixing speed scope.For this reason, the weld job person operates from moment t4 so that the translational speed of welding torch 4 is slack-off.By this operation, shown in Fig. 2 (D), translational speed signal St is slack-off gradually from moment t4, and t5 becomes constant speed state in the moment, keeps after this this speed.Translational speed under the constant speed state that this moment t5 is later is made as St2.Because this translational speed St2 is in the fixing speed scope, therefore shown in figure (H), the 1st alarm signal Kh1 is changed to 0 (low level) at moment t5.Servo-actuated in this, shown in Fig. 2 (I), stop the output of sound Sd at moment t5, also stop alarm song.So, the weld job person can be operated based on kind (frequency) guiding of the alarm song of the 1st alarm signal Kh1 the translational speed of welding torch 4, so that it is converged in the fixing speed scope.Shown in Fig. 2 (E), translational speed rate of change signal Dst is accompanied by the deceleration of translational speed in during moment t4～t5 and becomes the half period waveform of the sine wave of the peak value that negative value is shown.Do not carry out any processing according to this waveform.
Above-mentioned fixing speed scope is worth centered by the value of the suitable speed of welding setting signal Sr that determines according to the thickness of slab of mother metal, seam shape, welding etc., and the mobility scale that consideration can be allowed is set.For example, when the value of speed of welding setting signal Sr is 50cm/min, the fixing speed scope is set as 50 ± 5 scope.
If put in order, the value of differentiating exactly the translational speed signal St under the stable state for faster than the situation of the higher limit of fixing speed scope, be in situation in the fixing speed scope, be slower than these 3 kinds of situations of situation of the lower limit of fixing speed scope.Then, faster than the situation of fixing speed scope be slower than in the situation of lower limit the alarm song of the different frequency of ringing.The weld job person can recognize whether translational speed is in the OK range according to the kind of this alarm song.
Next, the action effect of the invention that above-mentioned embodiment is related is described.
When (1) the weld job person connects the welding torch switch with the state that welding torch is stopped in the welding starting position, the electric arc scratch start.Differentiate the scratch start of this electric arc with the energising of welding current, after having passed through predetermined dwell time Ts according to differentiation, by the 3rd alarm signal Kh3 alarm song of ringing.After the weld job person hears this alarm song, the movement to welding direction of beginning welding torch.Thus, thus owing to can begin the movement of welding torch at the time point that the formation state that makes electric arc scratch start molten bath becomes proper states, therefore can improve the welding quality of electric arc initial part.Thereby preset the time point that the formation state that makes electric arc scratch start molten bath becomes proper states with above-mentioned dwell time Ts.
(2) the weld job person begins the movement of welding torch, and keeps constant speed state.From move the transition period till beginning to play constant speed state, translational speed is accelerated till the constant speed value from 0 at this welding torch.This transition period too shortly or long all can make the welding quality variation no matter be.That is, there is OK range (stipulated time scope) for this transition period.For this reason, detect this transition period, when the time span of this transition period is in outside the OK range, give the alarm by the 2nd alarm signal Kh2.Thus, because the weld job person can recognize whether transition period is in the OK range, therefore can effectively utilize in the raising of welding quality.
(3) the weld job person remains on constant speed value (speed of welding) with the translational speed of welding torch.Judge whether this speed of welding is in the OK range (fixing speed scope) that thickness of slab according to mother metal, seam shape, welding etc. determine.Then, in the situation that this speed of welding is faster or slower than OK range, by the 1st alarm signal Kh1 alarm song of ringing.In the situation that speed of welding faster than OK range be slower than OK range, is made as this alarm song the sound of different frequency.Thus, the weld job person can recognize that the translational speed (speed of welding) of welding torch is faster than OK range, is in the OK range or is slower than OK range.Thus, the weld job person can be guided the translational speed with welding torch to operate in the OK range by this alarm song, can obtain good welding quality.
According to above-mentioned embodiment 1, possess: 3 axle acceleration sensors, it is arranged at welding torch; The translational speed calculating section, it carries out integration to the acceleration signal from each axle of 3 axle acceleration sensors when the electric arc scratch start, and synthetic these integrated signals are calculated the translational speed signal of welding torch; With the alarm generating unit, alarm when being in outside the fixing speed scope, the value of its translational speed signal under stable state occurs.Thus, the alarm that when the translational speed of welding torch is in outside the fixing speed scope, sounds the alarm etc.The weld job person can be guided the translational speed with welding torch to operate in the above-mentioned velocity interval by this alarm.In addition, in order to give the alarm, therefore the situation that production efficiency reduces can not appear in the operation of appending in the preparation before not needing to weld and the welding.Therefore, in the present embodiment, in manual arc welding, the situation of production efficiency can not occur reducing, can maintain the translational speed with welding torch and make support in the OK range.
In above-mentioned, illustrated by sound and carried out situation based on the alarm of the 1st alarm signal Kh1 and the 3rd alarm signal Kh3, but also can make the welding torch vibration.In addition, also can with display lamp and be used for carrying out alarm.In addition, in above-mentioned, illustrated to make the abnormal show lamp light to carry out situation based on the alarm of the 2nd alarm signal Kh2, but also can carry out alarm by sound.
[embodiment 2]
The invention that embodiment 2 is related changes the value of welding current according to the value of the translational speed signal under the stable state.
Fig. 3 is the block diagram of the related arc-welding apparatus of embodiments of the present invention 2, and Fig. 3 is that arc-welding apparatus is the situation of non-consumable electrode arc-welding apparatus.Fig. 3 is corresponding with above-mentioned Fig. 1, gives prosign to same module, and omits their explanation.Fig. 3 is the formation of having appended Current Control initialization circuit ICR in Fig. 1.Below, with reference to Fig. 3 the module that these are different is described.
Current Control initialization circuit ICR as input, in stable state, calculates Current Control setting signal Icr and output according to predetermined function with translational speed signal St, speed of welding setting signal Sr and current settings signal Ir.This Current Control setting signal Icr replaces current settings signal Ir and is imported into source of welding current PS, sets the value of welding current Iw.Above-mentioned function for example is Icr=Ir * (St/Sr).According to this function, if translational speed signal St faster than speed of welding setting signal Sr, then Current Control setting signal Icr becomes greater than current settings signal Ir.Otherwise if translational speed signal St is slower than speed of welding setting signal Sr, then Current Control setting signal Icr is less than current settings signal Ir.Thus, by the value of increase of weld current Iw when translational speed accelerates, the width that can suppress weld seam attenuates, and by reduce the value of welding current Iw when translational speed is slack-off, can suppress the width chap of weld seam.
Fig. 4 is the sequential chart of each signal of the arc-welding apparatus described in Fig. 3.Fig. 4 (A) expression welding commencing signal On, Fig. 4 (B) expression welding current Iw, Fig. 4 (C) expression energising judgment signal Cd, Fig. 4 (D) expression translational speed signal St, Fig. 4 (E) expression translational speed rate of change signal Dst, Fig. 4 (F) represents the 3rd alarm signal Kh3, and Fig. 4 (G) represents the 2nd alarm signal Kh2, and Fig. 4 (H) represents the 1st alarm signal Kh1.Fig. 4 (I) expression sound Sd.Fig. 4 is corresponding with Fig. 2, and the waveform of the signal beyond the welding current Iw shown in Fig. 4 (B) is all identical.Below, with reference to Fig. 4, centered by the waveform of welding current Iw, describe.
At moment t1, when electric arc 3 scratch start, shown in Fig. 4 (B), the welding current Iw of the value that the current settings signal Ir by Fig. 3 sets begins energising.Then, the dwell time Ts of moment t1～t2 and constantly t2～t3 from welding torch 4 begin mobile until the transition period of constant speed state, welding current Iw keeps this value.
Constantly t3 later during become stable state during.Shown in Fig. 4 (D), translational speed signal St becomes St1 in during moment t3～t4, and is slack-off gradually from moment t4, becomes later on t2 at moment t5.At this, St1 is the fast speed of speed of welding setting signal Sr than Fig. 3, and St2 is and Sr speed about equally.For this reason, Current Control initialization circuit ICR according to Fig. 3, constantly t3～t4 during in Current Control setting signal Icr become value greater than current settings signal Ir, constantly t5 later during in Current Control setting signal Icr become the value about equally with current settings signal Ir.Its result, like that, welding current Iw increases and becomes large at moment t3 shown in Fig. 4 (B), until constantly t4 keep this value.Then, welding current Iw reduces in during moment t4～t5 gradually, moment t5 later during in become the value of setting by current settings signal Ir.
According to above-mentioned embodiment 2, possesses the Current Control configuration part that changes the value of welding current according to the value of the translational speed signal under the stable state.Thus, become greater than when setting value value by increase of weld current Iw in translational speed, the width that can suppress weld seam attenuates, and becomes when being slower than setting value by reducing the value of welding current Iw in translational speed, and the width that can suppress weld seam broadens.
Above-mentioned embodiment 2 is that arc-welding apparatus is the situation of non-consumable electrode arc-welding apparatus, but the situation of plasma-arc welder is also identical.In addition, in the situation that arc-welding apparatus is the consutrode arc-welding apparatus, change the feed speed of welding wire by Current Control setting signal Icr, change thus the value of welding current Iw.
Claims (7)
1. arc-welding apparatus possesses: the source of welding current of output welding current and weldingvoltage and accept described welding current and described weldingvoltage comes and mother metal between the welding torch of electric arc occurs, described arc-welding apparatus is characterised in that to possess:
3 axle acceleration sensors, it is arranged at described welding torch;
The translational speed calculating section, it carries out integration to the acceleration signal from each axle of described 3 axle acceleration sensors when described electric arc scratch start, and synthetic these integrated signals are calculated the translational speed signal of described welding torch; With
The 1st alarm when the value of its described translational speed signal under stable state is in outside the fixing speed scope, occurs in the 1st alarm generating unit.
2. arc-welding apparatus according to claim 1 is characterized in that,
Described arc-welding apparatus also possesses:
The 2nd alarm generating unit, the rate of change of its described translational speed signal behind described electric arc scratch start are that the time span between initial stage more than predetermined the 1st a reference value is outside the stipulated time scope time, and the 2nd alarm occurs.
3. arc-welding apparatus according to claim 1 and 2 is characterized in that,
Described arc-welding apparatus also possesses:
The 3rd alarm generating unit, its time point that arrives predetermined dwell time in the elapsed time of lighting from the time of described electric arc scratch start sends the 3rd alarm.
4. each described arc-welding apparatus is characterized in that according to claim 1～3,
The alarm song of different frequency occurs in described the 1st alarm generating unit when the value of described translational speed signal surpasses the higher limit of described velocity interval and during the lower limit of not enough described velocity interval.
5. each described arc-welding apparatus is characterized in that according to claim 1～4,
With the described stable state of described the 1st alarm generating unit be made as elapsed time from the scratch start of described electric arc be more than predetermined fiducial time during.
6. each described arc-welding apparatus is characterized in that according to claim 1～4,
With the described stable state of described the 1st alarm generating unit be made as behind the described electric arc scratch start rate of change of described translational speed signal be more than predetermined the 2nd a reference value the state initial change for the time point of the state of not enough described the 2nd a reference value later during.
7. each described arc-welding apparatus is characterized in that according to claim 1～6,
Described arc-welding apparatus also possesses:
The Current Control configuration part, its value according to the described translational speed signal under the described stable state changes the value of described welding current.
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| JP2012064620 | 2012-03-22 | ||
| JP2012-064620 | 2012-03-22 | ||
| JP2013014498A JP6095384B2 (en) | 2012-03-22 | 2013-01-29 | Arc welding equipment |
| JP2013-014498 | 2013-01-29 |
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| CN103317209A true CN103317209A (en) | 2013-09-25 |
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| CN111679090A (en) * | 2020-06-16 | 2020-09-18 | 南京云岗智能科技有限公司 | Welding speed detection device for manual welding |
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| CN114749756A (en) * | 2021-01-08 | 2022-07-15 | 株式会社达谊恒 | Welding robot |
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| CN103317209B (en) | 2017-05-10 |
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