CN102615386A - Power supply device for welding and welding machine - Google Patents
Power supply device for welding and welding machine Download PDFInfo
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- CN102615386A CN102615386A CN2012100200456A CN201210020045A CN102615386A CN 102615386 A CN102615386 A CN 102615386A CN 2012100200456 A CN2012100200456 A CN 2012100200456A CN 201210020045 A CN201210020045 A CN 201210020045A CN 102615386 A CN102615386 A CN 102615386A
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Abstract
The invention provides a power supply device for welding and a welding machine. In the measuring mode of determining total resistance value R and total inductance value L to the front end of the electrode (12) related to the calculation of front end voltage, storing the suitable ranges of the resistance value and inductance of the power cable (14) used upon the main circuit between the power supply device (11) and the electrode (12) in a storage apparatus (35). The processing portion (32) of a control apparatus (31), based on the proper ranges of the resistance value and inductance value of the using cable (14), determines whether the obtained resistance value R and inductance value L are within the proper ranges or not.
Description
Technical field
The welding that the present invention relates to implement FEEDBACK CONTROL according to the calculating of terminal voltage before the electrode is with supply unit and possess the bonding machine of this welding with supply unit.
Background technology
Arc welding with supply unit for example shown in patent documentation 1; Be constituted as: through inverter circuit; To carry out the direct current after the rectification to interchange input electric power and be transformed to high-frequency alternating current from source power supply; Through rectification circuit and direct current reactor, will carry out the adjusted high-frequency alternating current of voltage by welding transformer and be transformed to the direct current output power that is suitable for arc welding.The output power that is generated by supply unit is fed into the electrode that is supported by welding torch, between electrode front end and welding object, produces electric arc thus, carries out the welding of welding object.
In addition; The detection of output current and output voltage is carried out in this welding with supply unit; Control device will be constantly detected output current and output voltage feed back to the PWM control of inverter circuit, and implement to make constantly output power to become the control of appropriate value, improve welding performance.
Patent documentation 1:JP spy opens flat 8-103868 communique
Yet; In order to produce suitable electric arc; The preferred output voltage that not only will in supply unit, detect is reflected to the controlling value of inverter circuit, also calculates the preceding terminal voltage of the electrode that correctly produces this electric arc, and terminal voltage before the electrode that calculates is reflected to controlling value.
Because the situation of separating between the welding torch that in fact welds (electrode) and the supply unit is more, the form that connects via power cable (power cable) between the two is general use form.Therefore, the cable length of power cable is different because of each user, so the resistance value of cable itself is different; And according to any intermediate position of cable; For example lay in several weeks as if unnecessary length is reeled, then according to the situation of laying point-blank or the difference of winding number, inductance value is also different.Therefore, for the resistance between the outside electrode of the supply unit of realizing the further raising of welding performance, can not ignore comprising power cable and the variation in voltage amount of inductance.
Therefore; Be reflected in the mode of controlling value of inverter circuit at the output voltage that will in supply unit, detect; Can produce following worry: the magnitude of voltage that deviates from terminal voltage before the real electrode is reflected to the controlling value of inverter circuit; This can hinder and produce suitable electric arc, hinders the further raising of welding performance.
In addition; Judge whether to measure the employed resistance value of calculating of the preceding terminal voltage of electrode and each measured value of inductance value accurately; Promptly enable to measure accurately measured value; Whether the power cable itself about original use is suitable, and the well-formedness of the power cable whether any intermediate position well waits is difficult to judge.Therefore, skilled operators is required to carry out these judgements etc., aspect operating efficiency, have room for improvement.
Summary of the invention
The present invention makes in order to solve above-mentioned problem, and the welding that its purpose is to provide the well-formedness judgement of employed power cable on quality judgement and the main circuit of measured value of a kind of employed resistance value of calculating that can easily carry out terminal voltage before the electrode and inductance value etc. is with supply unit and possess the bonding machine of this welding with supply unit.
In order to solve above-mentioned problem; Invention described in the technical scheme 1 is that supply unit is used in a kind of welding; It possess with direct current be transformed to high-frequency alternating current inverter circuit, carry out the alternating current after the conversion the voltage adjustment welding transformer and generate the DC converting mechanism of the direct current output power that is suitable for welding according to the secondary side alternating current of this welding transformer; It also possesses controlling organization; This controlling organization be based on the said output power that generated to the supply of electrode and welding object between be used in the mechanism that the electric arc of welding produces; And based on the preceding terminal voltage of calculating said electrode by detected output current of testing agency in this device and output voltage; Preceding terminal voltage based on calculating is controlled said inverter circuit; Wherein, Said welding has the mode determination of carrying out the processing that comprises resistance value calculation mechanism and inductance value calculation mechanism with supply unit; And possess front end voltage calculation mechanism, said resistance value calculation mechanism is made as short-circuit condition with said electrode and handles, the magnitude of voltage of the said output voltage when being made as the rated current value based on the said output current that will be produced by the action of said inverter circuit; Calculate the total resistance value on the path till the said electrode front end; Said inductance value calculation mechanism is made as short-circuit condition with said electrode and handles, and the current attenuation amount that begins when being set at the rated current value based on the said output current that will be produced by the action of said inverter circuit calculates the total inductance value on the path till the said electrode front end; Said front end voltage calculation mechanism is to by said total resistance value and the relevant voltage variety of said total inductance value on the magnitude of voltage correction of the detected said output voltage of said testing agency and the path till said electrode front end; Calculate said before terminal voltage, said welding also possesses with supply unit: the data maintaining body, its remain on the power cable that uses on the main circuit between said supply unit and the said electrode each use kind said resistance value and inductance value at least one measured value proper range, or can set the intrinsic information of proper range; With the exceptional value decision mechanism, it carries out the exceptional value of said measured value and judges according to the whether judgement in proper range of said measured value.
In this invention; Measure with electrode before in the relevant total resistance value till the electrode front end of the calculating of terminal voltage and the mode determination that adds up to inductance value, remain on by the data maintaining body power cable that uses on supply unit-interelectrode main circuit each use kind resistance value and inductance value at least one measured value proper range, perhaps can set the intrinsic information of proper range.In the exceptional value decision mechanism, judge that measured value whether in proper range, promptly carries out exceptional value and judge.Thus, can easily judge whether to the resistance value that will measure and the measured value of inductance value measure accurately.In addition, promptly enable measured value is measured accurately, also can easily judge about the well-formedness (cable itself, any intermediate position etc.) of the power cable of original use.
Invention described in the technical scheme 2 be the welding described in the technical scheme 1 with supply unit in, possess exception reporting mechanism, it reports this situation being judged as by said exceptional value decision mechanism when said measured value is exceptional value.
In this invention, when judging that by the exceptional value decision mechanism measured value is exceptional value, carry out unusual report by exception reporting mechanism.Thus, it is unusual easily to discern measured value by the operator, can promptly carry out follow-up reply.
Invention described in the technical scheme 3 be the welding described in technical scheme 1 or 2 with supply unit in; Said total resistance value that in said mode determination, obtains and total inductance value are the values that keeps while upgrading; Said exceptional value decision mechanism is carrying out under the situation of judgement that said measured value is an exceptional value, forbids said total resistance value that is kept and the renewal that adds up to inductance value.
In this invention, the exceptional value decision mechanism is carrying out under the situation of judgement that measured value is an exceptional value, forbids being updated in the total resistance value that kept that will use in the calculating of terminal voltage before the electrode and adds up to inductance value.Thus, can prevent useless Data Update,, also can stay last time normal data so even for example be judged as and last time kept normal data, this is an exceptional value.
Invention described in the technical scheme 4 is to possess the bonding machine that each described welding of technical scheme 1～3 constitutes with supply unit.
In this invention, the bonding machine of the well-formedness judgement etc. of employed power cable on quality judgement and the main circuit of measured value of a kind of employed resistance value of calculating that can easily carry out terminal voltage before the electrode and inductance value can be provided.
The invention effect
According to the present invention, the welding of well-formedness judgement etc. that employed power cable on quality judgement and the main circuit of measured value of a kind of employed resistance value of calculating that can easily carry out terminal voltage before the electrode and inductance value can be provided is with supply unit and possess the bonding machine of this welding with supply unit.
Description of drawings
Fig. 1 is the pie graph of supply unit of the arc welding machine of this embodiment of expression.
Fig. 2 is used for the key diagram that the variation to inductance value describes.
Fig. 3 is used for the key diagram that the computational methods to resistance value and inductance value describe.
Fig. 4 is the employed sequential chart when describing of the judgement to short-circuit condition.
Symbol description:
10 arc welding machines (bonding machine)
Supply unit is used in 11 welding
12 wire-electrode (electrode)
14 power cables
22 inverter circuits
23 welding transformers
24 rectification circuits (DC converting mechanism)
25 direct current reactors (DC converting mechanism)
31 control device (controlling organization, front end voltage calculation mechanism, resistance value calculation mechanism, inductance value calculation mechanism, exceptional value decision mechanism, exception reporting mechanism)
33 current sensors (testing agency)
34 voltage sensors (testing agency)
35 storage devices (data maintaining body)
36 exception reporting devices (exception reporting mechanism)
The M welding object
The I output current
The Ip1 current value
The Ip2 current value
The V output voltage
Terminal voltage (front end magnitude of voltage) before the Va
R adds up to resistance value
L adds up to inductance value
L (I) function
The specific embodiment
Below, according to accompanying drawing the embodiment after the present invention is specialized is described.Fig. 1 representes the arc welding machine 10 of consumable electrode type.In arc welding machine 10; Positive side lead-out terminal welding with supply unit 11 connects the wire-electrode 12 that is supported by welding torch TH; Minus side lead-out terminal at this supply unit 11 connects welding object M; Through the power supply of the direct current output power that generates by this supply unit 11, carry out arc welding to wire-electrode 12.At this moment, because wire-electrode 12 time is consumed in welding, so welding wire generator 13 is given corresponding to consumption.To wire-electrode 12 and welding object M, supply with output power via the power cable 14 that the lead-out terminal with supply unit 11 is connected.
It is that interchange input power converter with the three-phase that provides from source power supply is the device that is suitable for the direct current output power of arc welding that supply unit 11 is used in welding.Exchange input electric power and be transformed to direct current through the rectifier smoothing circuit 21 that is made up of diode bridge and smmothing capacitor, the direct current after the conversion is transformed to high-frequency alternating current through inverter circuit 22.Inverter circuit 22 is made up of the bridgt circuit that has used 4 switch element TR such as IGBT, implements the PWM control based on control device 31.
The high-frequency alternating current that is generated by inverter circuit 22 is transformed to the secondary side alternating current that is adjusted into the assigned voltage value by welding transformer 23.The rectification circuit 24 and direct current reactor 25 of the secondary side alternating current of welding transformer 23 through having used diode is transformed to the direct current output power that is suitable for arc welding.
The direct current reactor 25 of this embodiment uses the supersaturation reactor with supersaturation characteristic.The characteristic of direct current reactor 25 is as shown in Figure 2, and the big high galvanic areas of ratio rated current value Ia that comprises current value I p1 is the common characteristic zone A1 fixing with the MIN inductance value La of necessity.On the other hand, becoming low current zone below the rated current value Ia is the supersaturation characteristic zone A2 (current value I p2, inductance value Lb) that the minimizing inductance value along with current value increases linearly gradually.Promptly; Through the direct current reactor 25 that adopts such characteristic; Thereby it is little in high galvanic areas inductance value; So the influence to being used for the level and smooth Waveform Control of electric current is little, prevented arc cutting thereby increase inductance value in the low current zone passage, generated at all suitable direct current output power of whole galvanic areas.
As shown in Figure 1, the switch element TR of 31 pairs of inverter circuits 22 of control device implements PWM control, makes the direct current output power be the control of appropriate value often.At this moment, control device 31 carries out output current I and the detection of output voltage V constantly, carries out the feedback to PWM control based on detected output current I and output voltage V.
That is, possess current sensor 33 on the power line of the minus side lead-out terminal in supply unit 11, control device 31 detects the output current I of supply units 11 via this current sensor 33 in handling part (CPU) 32.In addition, possess voltage sensor 34 between the power line after adjacent rectification circuit 24, control device 31 detects the output voltage V of supply units 11 via this voltage sensor 34 in handling part 32.Control device 31 carries out the calculating of the dutycycle (duty) of PWM control based on by detected constantly output current I of handling part 32 and output voltage V, generates the pwm control signal to inverter circuit 22 outputs.
At this, in PWM control, as the output voltage V that is used to control, preferred employing correctly produces the preceding terminal voltage Va of the wire-electrode 12 of electric arc, but the direct detection of preceding terminal voltage Va is difficult.For this reason; Control device 31 will remain on the storage device (diagram slightly) by the voltage variety 12 from voltage sensor 34 to electrode in advance; Detected output voltage V is constantly carried out the correction of this voltage variety; With terminal voltage Va before obtaining, and implement to have adopted the PWM of the preceding terminal voltage Va that is calculated to control.
Yet; The voltage variety 12, there is the voltage variety (from lead-out terminal via the voltage variety that by resistance value R2 and inductance value L2 cause of power cable 14 till electrode 12 front ends) of inner voltage variety of supply unit 11 (till by resistance value R1 and the caused voltage variety of inductance value L1) and outside from rectification circuit 24 to lead-out terminal from voltage sensor 34 to electrode.In order not receive the influence of user mode; The calculating of terminal voltage Va before can the builtin voltage variable quantity of supply unit 11 being enrolled as correction term in advance; But the external voltage variable quantity is because the cable of power cable 14 is long or any intermediate position (straight-run or coiling lay, its winding number) waits, condition is because of each user's difference, so largely receive resistance value R2, the particularly influence of the variation of inductance value L2.
For this reason; The user is provided with arc welding machine 10 at the scene; Also comprise when becoming correct user mode in being laid in of power cable 14, measure the resistance value R and the inductance value L that obtain after the resistance value R1 of inside and inductance value L1 and outside resistance value R2 and inductance value L2 added up to.Total resistance value R that mensuration obtains and total inductance value L are maintained in the control device 31.
In addition; In the supply unit 11 of this embodiment, has mode determination; This mode determination is carried out and is used to the processing carrying out above-mentioned total resistance value R and add up to the mensuration of inductance value L; According to the operation of the console switch that is equipped with in the supply unit 11 (diagram slightly), control device 31 can move to mode determination.In addition, also can constitute: the remote controller (all not shown) that is equipped with in the welding torch switch that is equipped with among the use welding torch TH, the welding wire generator 13 moves to mode determination from the position of leaving supply unit 11.In addition; When the mensuration of mode determination; Need wire-electrode 12 be made as the state with welding object M short circuit; But as shown in Figure 1 in this embodiment, not with wire-electrode 12 and welding object M direct short-circuit, but make the leading section that is provided in welding torch TH and measure to contact chip THa and welding object M short circuit that wire-electrode 12 is supplied power.In this case, also can make the special fixtures that short circuit uses uses.
If mode determination is described in detail, as shown in Figure 3, at first, make inverter circuit 22 work, output current I increases to current value I p1.This current value I p1 is in the monomer of the direct current reactor with supersaturation characteristic 25, with the current value of the fixing common characteristic zone A1 of inductance value La.In fact, as shown in Figure 2, owing to characteristic squints because of any intermediate position of power cable 14 etc.,, be set to the current value of the common characteristic zone A1 that has considered this side-play amount so add up to inductance value L to fix with the value La1 of skew.And, measure the average voltage level Ve in the interval that keeps with such current value I p1.Thus, at first calculate total resistance value R through following formula (a).
R＝Ve/Ip1…(a)
Then, the action of inverter circuit 22 is stopped, picking up counting from moment T0 at this moment.Simultaneously; Carry out with moment T0 is the sampling of the output current I that changes constantly of starting point; The moment that will reach conduct and the current value Δ Ip1 (Ip1 * 36.8%) of the corresponding current attenuation amount of time constant is made as T1, tries to achieve time (time constant) τ 1 between this moment T1-T0.Thus, calculate through following formula (b) at the total inductance value La1 of characteristic zone A1 variation usually (being inductance value La in the monomer of reactor 25).
La1＝R·τ1(＝Ve·τ1/Ip1)…(b)
Then, make inverter circuit 22 actions once more, output current I is adjusted to the rated current value Ip2 in the A2 of supersaturation characteristic zone.After adjustment, the action of inverter circuit 22 is stopped, picking up counting from moment T2 at this moment.Simultaneously; Carry out with moment T2 is the sampling of the output current I that changes constantly of starting point; The moment that will reach conduct and the current value Δ Ip2 (Ip2 * 36.8%) of the corresponding current attenuation amount of time constant is made as T3, tries to achieve time (time constant) τ 2 between this moment T3-T2.Thus, the total inductance value Lb1 that A2 changes in supersaturation characteristic zone (in the monomer of reactor 25, being inductance value Lb) is calculated by following formula (c).
Lb1＝R·τ2＝(Ve·τ2/Ip2)…(c)
Then, as shown in Figure 2, the total inductance value La1 of the common characteristic zone A1 that calculates and the total inductance value Lb1 of supersaturation characteristic zone A2 augment through straight line, obtain adding up to the function L (I) of inductance value L as electric current I.Then, the function L (I) of the total inductance value L that obtains like this and the total resistance value R that had before obtained are remained in the control device 31.Thus, mode determination finishes.
Then, control device 31 is in when action welding, terminal voltage Va before being calculated by following formula (d) according to constantly output current I and output voltage V.
Va＝V-L(I)·dI/dt-RI…(d)
In addition, if with concrete numeric representation, with current value I p1=400 [A] output 10 [ms] clock of output current I, afterwards, make inverter circuit 22 disconnections according to the connection of inverter circuit 22.When average voltage level Ve during this period is 4 [V],, calculate total resistance value R, R=Ve/Ip1=4/400=0.01 [Ω] according to above-mentioned formula (a).
Then; The current value Δ Ip1 that current value I p1 becomes the current attenuation amount suitable with timeconstant 1 is Δ Ip1=400 * 0.368=147 [A]; Output current I is 3 [ms] from the timeconstant 1 that 400 [A] reach 147 [A] if make inverter circuit 22 break off afterwards, then according to above-mentioned formula (b)
La1＝R·τ1＝0.01×3＝0.03[mH]
In common characteristic zone A1, calculate the total inductance value La1 of the inductance value La of the monomer that comprises direct current reactor 25.In addition, above-mentioned current value I p1 needs to infer according to the specification of the direct current reactor 25 that uses in advance, and is set at the value that does not reach supersaturation characteristic zone A2.
Then, inverter circuit 22 is connected, output current I is made as for example suitable with the minimum current of the arc welding machine 10 current value I p2=20 [A] in the A2 of supersaturation characteristic zone, output 10 [ms] clock afterwards, turn-offs inverter circuit 22.The current value Δ Ip2 that current value I p2 becomes the current attenuation amount suitable with timeconstant 2 does
ΔIp2＝20×0.368＝7[A]
If output current I is 10 [ms] from the timeconstant 2 that 20 [A] reach 7 [A] after the disconnection inverter circuit 22, then according to above-mentioned formula (c),
Lb1＝R·τ2＝0.01×10＝0.1[mH]
In the A2 of supersaturation characteristic zone, calculate the total inductance value Lb1 of the inductance value Lb of the monomer that comprises direct current reactor 25.
Then, augment, thereby obtain adding up to the function L (I) of inductance value L, and, can calculate preceding terminal voltage Va constantly according to above-mentioned formula (d) according to this function and the total resistance value R that had before obtained through the straight line that carries out these La1=0.03 [mH], Lb1=0.1 [mH].In addition, the above-mentioned concrete numerical value of enumerating is an example, is not to be defined in this.
Even also can suitably calculate preceding terminal voltage Va in the welding of this embodiment that adopts direct current reactor 25 like this in supply unit 11, can carry out the control constantly of inverter circuit 22 more rightly based on the preceding terminal voltage Va that suitably calculates thus with supersaturation characteristic.Therefore, through with the complementary effect of the reactor 25 that adopts the supersaturation characteristic, can be created on all direct current output powers of using of arc welding more suitably of whole galvanic areas.
Yet, before the above-mentioned practical measurement of mode determination, carry out the judgement (judging before measuring) whether electrode 12 (contact chip THa) becomes sufficient short-circuit condition.Specifically, as shown in Figure 4, before the practical measurement of carrying out, electrode 12 (contact chip THa) is applied the for example voltage about 15 [V] implementing to make output current I increase to current value I p1.In addition, below the output voltage V of above-mentioned use is divided into actual outlet side and detection side, the output voltage of actual outlet side is made as " Vs ", the output voltage of detection side is made as " Vm ".
The output voltage V s of 15 [V] when judging before measuring applies, and is under the normal situation in the short-circuit condition of electrode 12 (contact chip THa), is near the small magnitude of voltage 0 [V] by the handling part 32 detected output voltage V m of control device 31.Therefore, detected output voltage V m is lower than and is used for the unusual threshold value of judging of short circuit, handling part 32 be judged as be in can practical measurement short-circuit condition.On the other hand, producing under the unusual situation of short circuit, the magnitude of voltage of detected output voltage V m uprises.Be used for the unusual threshold value of judging of short circuit if be higher than, then to be judged as be the short circuit abnormality that can not suitably carry out ensuing practical measurement to handling part 32.So handling part 32 makes 36 work of exception reporting device report unusually to the operator.
The pronounce device etc. of report such as in addition, exception reporting device 36 is reported by having used at the display of outfits such as supply unit 11 or welding torch TH, welding wire generator 13, the work sound through buzzer or relay constitutes.In addition, on one side under the situation that discharges on one side the arc welding machine 10 that inert gas welds, also can carry out previous exception reporting by the unlocking noise of gas from the leading section of welding torch TH.Then, the operator receives this exception reporting, carries out the reliable short circuit of electrode 12 (contact chip THa), implements to measure according to judging before measuring once again.
Then, because it is also conceivable that when implementing practical measurement, the short-circuit condition of electrode 12 (contact chip THa) takes place unusual, so the handling part 32 of control device 31 carries out the detection of the abnormal voltage of detected output voltage V m.If detect the abnormal voltage that generation is caused by short circuit unusually, then handling part 32 likewise makes 36 work of exception reporting device report unusually to the operator with above-mentioned.The operator likewise receives this exception reporting, carries out the reliable short circuit of electrode 12 (contact chip THa), implements to measure according to judging before measuring once again.
And then even it is also conceivable that owing to normal termination is measured in the short circuit that does not produce electrode 12 (contact chip THa) unusually, the total resistance value R that is obtained also possibly become exceptional value with adding up to inductance value L.For example, the power cable that between supply unit 11 and welding torch TH, lays 14 adopts inappropriate cables such as sectional areas, cable are long, even or the unusual situation of suitable product but reeling condition inferior, measured value can become exceptional value.Given this; In the storage device 35 that in the control device 31 of this embodiment, is equipped with, will be suitable for that sectional area and the cable of cable 14 of this supply unit 11 is long etc., line data storehouse (DB) change of going forward side by side of being associated with the proper range of its resistance value zero [Ω] and inductance value Δ [μ H] keeps.
Then, handling part 32 is according to the resistance value of the cable 14 of current use and the proper range of inductance value, the total resistance value R that judges practical measurement with add up to inductance value L whether in this proper range.Under the situation in proper range, add up to resistance value R and the renewal that adds up to inductance value L, promptly carry out the total resistance value R and the Data Update that adds up to inductance value L of current maintenance, be used for later control as control device 31.On the other hand; The total resistance value R that is judged as mensuration with add up to inductance value L outside proper range under the situation of (exceptional value); Do not carry out the total resistance value R and the Data Update that adds up to inductance value L of current maintenance as control device 31, implement exception reporting by exception reporting device 36.The operator receives this exception reporting, can measure the affirmation of state, carries out affirmation and the affirmation of its any intermediate position etc. of the power cable 14 of current use itself.
Next, the distinctive effect of notebook embodiment.
(1) under the mode determination of measuring relevant total resistance value R till the front end of electrode 12 of calculating with preceding terminal voltage Va and total inductance value L (being function L (I)) in this embodiment, the resistance value of each use kind of the power cable 14 that on the main circuit of 12 at supply unit 11 and electrode, uses, the proper range of inductance value remain in the storage device 35 after by data base system.Handling part 32 is according to the resistance value of the cable 14 of current use, the proper range of inductance value, judges that resistance value R that practical measurement obtains and inductance value L are whether in this proper range (exceptional value judgement).Wherein, under the situation in proper range, carry out the Data Update of the resistance value R and the inductance value L of current maintenance by control device 31.Thus, can easily judge whether to the resistance value R that will measure and the measured value of inductance value L carry out high-precision mensuration.In addition, promptly enable accurately measured value to be measured, also can easily judge the well-formedness (cable itself, any intermediate position etc.) of the power cable 14 of original use.Therefore, even do not rely on skilled operators can carry out these judgements easily, so be expected to improve operating efficiency yet.
(2) when the measured value that is judged as resistance value R and inductance value L is exceptional value, unusual report is carried out in the work of exception reporting device.Thus, it is unusual easily to discern measured value by the operator, can promptly carry out follow-up reply.
(3) be under the situation of judgement of exceptional value in the measured value of having carried out resistance value R and inductance value L, the resistance value R of the maintenance of forbidding in the calculating of preceding terminal voltage Va, will using and the renewal of inductance value L.Thus, can prevent useless Data Update,, also can stay last time normal data so even for example be judged as and last time kept normal data, this is an exceptional value.
In addition, embodiment of the present invention also can change as following.
In the above-described embodiment; When the measured value that is judged as resistance value R and inductance value L is exceptional value; The Data Update of forbidding resistance value R and the inductance value L relevant with the calculating of preceding terminal voltage Va; But the judged result that also can judge regardless of exceptional value how, when each mensuration, all carries out Data Update.In addition, also can select whether to carry out the judgement of Data Update by the operator.
The hold mode of the data of narration and the judgment mode of exceptional value are an example in the above-described embodiment, so can carry out suitable change.
For example about the hold mode of data, be to use the data of proper range of resistance value, the inductance value of kind to keep in the above-mentioned embodiment, but for example also can keep any number formulary certificate in resistance value, the inductance value each of power cable 14.In addition, also can not keep the data of proper range of resistance value, the inductance value of various cables 14, but keep the data of an eigenvalue respectively, set its proper range in handling part 32 sides.In addition, about the judgement of exceptional value, be relatively judging between proper range and the practical measurement value of resistance value, inductance value according to each cable 14, but also relatively judging according to any side only.
The exception reporting device 36 of narration is nothing but an example, so can suitably change in the above-described embodiment.
In the above-described embodiment, though carry out the unusual judgement of short circuit of electrode 12 before mensuration or in the actual measurement calmly, also can this be omitted.
Used direct current reactor 25 in the above-described embodiment, but also can use general reactor with current value and the fixing linear characteristic that changes of inductance value with supersaturation characteristic.In addition, if use such reactor, then the mensuration through the primary current attenuation just can obtain inductance value (need not obtain function), and is easy thereby the calculating of preceding terminal voltage Va becomes.
Claims (4)
1. welding supply unit; It possess with direct current be transformed to high-frequency alternating current inverter circuit, carry out the alternating current after the conversion the voltage adjustment welding transformer and generate the DC converting mechanism of the direct current output power that is suitable for welding according to the secondary side alternating current of this welding transformer; It also possesses controlling organization; This controlling organization be based on the said output power that generated to the supply of electrode and welding object between be used in the mechanism that the electric arc of welding produces; And based on the preceding terminal voltage of calculating said electrode by detected output current of testing agency in this device and output voltage; Preceding terminal voltage based on calculating is controlled said inverter circuit
Wherein, Said welding has the mode determination of carrying out the processing that comprises resistance value calculation mechanism and inductance value calculation mechanism with supply unit; And possesses front end voltage calculation mechanism; Said resistance value calculation mechanism is made as short-circuit condition with said electrode and handles; The magnitude of voltage of the said output voltage when being made as the rated current value based on the said output current that will produce by the action of said inverter circuit; Calculate the total resistance value on the path till the said electrode front end, said inductance value calculation mechanism is made as short-circuit condition with said electrode and handles, the current attenuation amount that begins when being set at the rated current value based on the said output current that will be produced by the action of said inverter circuit; Calculate the total inductance value on the path till the said electrode front end; Said front end voltage calculation mechanism is to by said total resistance value and the relevant voltage variety of said total inductance value on the magnitude of voltage correction of the detected said output voltage of said testing agency and the path till said electrode front end, calculate said before terminal voltage
Said welding also possesses with supply unit:
The data maintaining body, its remain on the power cable that uses on the main circuit between said supply unit and the said electrode each use kind said resistance value and inductance value at least one measured value proper range, or can set the intrinsic information of proper range; With
The exceptional value decision mechanism, it carries out the exceptional value of said measured value and judges according to the whether judgement in proper range of said measured value.
2. supply unit is used in welding according to claim 1, it is characterized in that,
Possess exception reporting mechanism, it reports this situation being judged as by said exceptional value decision mechanism when said measured value is exceptional value.
3. supply unit is used in welding according to claim 1 and 2, it is characterized in that,
Said total resistance value that in said mode determination, obtains and total inductance value are the values that keeps while upgrading,
Said exceptional value decision mechanism is carrying out under the situation of judgement that said measured value is an exceptional value, forbids said total resistance value that is kept and the renewal that adds up to inductance value.
4. a bonding machine is characterized in that, each the described welding that possesses claim 1～3 constitutes with supply unit.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2011-015509 | 2011-01-27 | ||
| JP2011015509A JP5756297B2 (en) | 2011-01-27 | 2011-01-27 | Welding power supply and welding machine |
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| CN102615386A true CN102615386A (en) | 2012-08-01 |
| CN102615386B CN102615386B (en) | 2015-07-15 |
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Cited By (7)
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| CN105149736A (en) * | 2015-10-15 | 2015-12-16 | 上海通用重工集团有限公司 | Automatic detection device for cable resistance value of manual welding machine output circuit |
| CN105171190A (en) * | 2015-10-15 | 2015-12-23 | 上海通用重工集团有限公司 | Intelligent detecting device for arc voltage of manual welding machine |
| CN109910317A (en) * | 2019-01-31 | 2019-06-21 | 浙江大学 | It is a kind of it is accurate control electric fusion welding during electric melting pipe fittings weldingvoltage method |
| CN110202240A (en) * | 2018-02-28 | 2019-09-06 | 依赛彼公司 | The arc voltage of welder senses and control |
| CN110605459A (en) * | 2018-06-15 | 2019-12-24 | 株式会社达谊恒 | Welding power supply device |
| CN110891723A (en) * | 2017-07-25 | 2020-03-17 | 松下知识产权经营株式会社 | Arc welding machine |
| CN113000983A (en) * | 2019-12-18 | 2021-06-22 | 发那科株式会社 | Arc welding robot system |
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| JP5868712B2 (en) * | 2012-01-20 | 2016-02-24 | 株式会社ダイヘン | Power supply for welding |
| US11642737B2 (en) * | 2017-07-25 | 2023-05-09 | Illinois Tool Works, Inc. | System and method for inductance compensation in a welding-type system |
| DE102020208710A1 (en) | 2020-07-13 | 2022-01-13 | Mahle International Gmbh | Heat exchanger, fuel cell arrangement and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105149736A (en) * | 2015-10-15 | 2015-12-16 | 上海通用重工集团有限公司 | Automatic detection device for cable resistance value of manual welding machine output circuit |
| CN105171190A (en) * | 2015-10-15 | 2015-12-23 | 上海通用重工集团有限公司 | Intelligent detecting device for arc voltage of manual welding machine |
| CN105171190B (en) * | 2015-10-15 | 2017-06-16 | 上海通用重工集团有限公司 | The intelligent detection device of manual welding machine arc voltage |
| CN110891723A (en) * | 2017-07-25 | 2020-03-17 | 松下知识产权经营株式会社 | Arc welding machine |
| CN110202240A (en) * | 2018-02-28 | 2019-09-06 | 依赛彼公司 | The arc voltage of welder senses and control |
| CN110605459A (en) * | 2018-06-15 | 2019-12-24 | 株式会社达谊恒 | Welding power supply device |
| CN110605459B (en) * | 2018-06-15 | 2022-08-02 | 株式会社达谊恒 | Welding power supply device |
| CN109910317A (en) * | 2019-01-31 | 2019-06-21 | 浙江大学 | It is a kind of it is accurate control electric fusion welding during electric melting pipe fittings weldingvoltage method |
| CN109910317B (en) * | 2019-01-31 | 2020-06-16 | 浙江大学 | Method for accurately controlling welding voltage of electric melting pipe fitting in electric melting welding process |
| CN113000983A (en) * | 2019-12-18 | 2021-06-22 | 发那科株式会社 | Arc welding robot system |
Also Published As
| Publication number | Publication date |
|---|---|
| JP5756297B2 (en) | 2015-07-29 |
| JP2012152805A (en) | 2012-08-16 |
| CN102615386B (en) | 2015-07-15 |
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