CN102615385B - Welding supply unit and bonding machine - Google Patents
Welding supply unit and bonding machine Download PDFInfo
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- CN102615385B CN102615385B CN201210019587.1A CN201210019587A CN102615385B CN 102615385 B CN102615385 B CN 102615385B CN 201210019587 A CN201210019587 A CN 201210019587A CN 102615385 B CN102615385 B CN 102615385B
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Abstract
A kind of welding supply unit and bonding machine are provided, no matter situation are set how, the resistance value that the calculating that can easily measure electrode front voltage uses and inductance value.When switching to the mode determination measuring the resistance value to the front end of electrode (12) relevant to the calculating of front voltage and inductance value, by carrying out being combined with the predetermined operation of welding torch switch (41) and the microswitch (42c) be equipped with in the remote controller (42) of welding torch (TH) and welding wire generator (13), carry out the switching to this mode determination dividually with the original respective action of operated switch (41,42c) thus.Namely, by the predetermined operation of the switch of these welding torches and remote controller of being positioned at ate electrode, easily implement to measure while can confirming the state of the fore-end of electrode when measuring, in addition, even if under the situation that arranges of the supply unit (11) such with the very large distance of electrode separation itself, also easily can implement it and measure.
Description
Technical field
The present invention relates to and implement the welding supply unit of FEEDBACK CONTROL according to the calculating of electrode front voltage and possess the bonding machine of this welding supply unit.
Background technology
Arc welding with supply unit such as Patent Document 1, be configured to: pass through inverter circuit, be high-frequency alternating current by having carried out the DC power conversion after rectification to the AC input power from source power supply, by rectification circuit and direct current reactor, the high-frequency alternating current after having carried out Voltage Cortrol by welding transformer is transformed to the DC output power being suitable for arc welding.The output power generated by supply unit is fed into the electrode supported by welding torch, produces electric arc thus between electrode front end and welding object, carries out the welding of welding object.
In addition, this welding supply unit carries out the detection of output current and output voltage, the PWM that the output current detected constantly and output voltage are fed back to inverter circuit by control device controls, and implements to make output power constantly become the control of appropriate value, improves welding performance.
Patent document 1:JP Unexamined Patent 8-103868 publication
But, in order to produce suitable electric arc, preferably not only the output voltage detected in supply unit is reflected to the controlling value of inverter circuit, also calculates the front voltage of the electrode correctly producing this electric arc, the electrode front voltage calculated is reflected to controlling value.
Because the welding torch (electrode) in fact carrying out welding is more with situation about being separated between supply unit, the form connected via power cable (power cable) is between the two 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, lay in a few week if such as reeled by additional length, then according to the difference of the situation of laying point-blank or winding number, inductance value is also different.Therefore, in order to realize the further raising of welding performance, the resistance between the electrode can not ignoring the supply unit outside comprising power cable and the variation in voltage amount of inductance.
Therefore, in the mode of the controlling value output voltage detected in supply unit being reflected to inverter circuit, following worry can be produced: the magnitude of voltage deviated from real electrode front voltage is reflected to the controlling value of inverter circuit, this can hinder and produce suitable electric arc, hinders the further raising of welding performance.
When the resistance value that the calculating measuring such electrode front voltage uses and inductance value, carry out the operation waited under the state requiring terminal shortcircuit before making electrode, so desired operation person is positioned near electrode front end.On the other hand, when only can set operation when measuring in supply unit side, especially, when supply unit is arranged at not only in the horizontal direction but also in the position that above-below direction also separates relative to electrode part, the operator be positioned near electrode front end is difficult to the operation carrying out supply unit.
Summary of the invention
The present invention makes to solve above-mentioned problem, its object is to provide one no matter how to arrange situation, the welding supply unit of the mensuration of the resistance value that the calculating easily can carrying out electrode front voltage uses and inductance value and possess the bonding machine of this welding supply unit.
In order to solve above-mentioned problem, invention described in technical scheme 1 is a kind of welding supply unit, it possesses DC power conversion is the inverter circuit of high-frequency alternating current, the welding transformer of the Voltage Cortrol of the alternating current after converting, the DC converting mechanism being suitable for the DC output power welded is generated with the secondary side alternating current according to this welding transformer, it also possesses controlling organization, this controlling organization between welding object, is used in the supply of electrode the mechanism that weld electric arc produces based on generated described output power, and the front voltage of described electrode is calculated based on the output current detected by the testing agency in this device and output voltage, described inverter circuit is controlled based on the front voltage calculated, wherein, described welding supply unit has the mode determination performing the process comprising resistance value calculating mechanism and inductance value calculation mechanism, and possess front voltage and calculate mechanism, described resistance value calculates mechanism and described electrode is set to short-circuit condition and processes, the magnitude of voltage of described output voltage when being set to rated current value based on the described output current action by described inverter circuit produced, calculate the total resistance value on the path till described electrode front end, described electrode is set to short-circuit condition and processes by described inductance value calculation mechanism, current attenuation amount when being set as rated current value based on the described output current action by described inverter circuit produced, calculate the total inductance value on the path till described electrode front end, described front voltage calculates mechanism's voltage variety relevant to the described total resistance value on the path to described electrode front end and described total inductance value to the magnitude of voltage correction of the described output voltage detected by described testing agency, calculate described front voltage, described welding supply unit also possesses switching mechanism, this switching mechanism can according to the predetermined operation utilizing at least one switch in various console switch to carry out, described mode determination is differently switched with the original respective action of operated switch, described various console switch is arranged at respectively and carries out the support of described electrode and the welding torch of power supply, the remote controller that is equipped with in the welding wire generator given of this electrode is carried out with consumption when welding when to correspond to described electrode be wire-electrode.
In the invention, when switching to the mode determination measuring the total resistance value to electrode front end relevant to the calculating of electrode front voltage and total inductance value, carry out predetermined operation by least one switch in the various console switch that arrange the remote controller respectively at welding torch and welding wire generator, thus carry out the switching to mode determination dividually with the original respective action of operated switch.Namely, by adopting the switch for carrying out other action original be equipped with in welding torch or remote controller, thus need not arrange for implementing the switch measured in addition, by the predetermined operation of the switch of these welding torches and remote controller of being positioned at ate electrode, thus easily implement to measure while the state of electrode fore-end can being confirmed when measuring.Thus, even if under the situation that arranges of the supply unit such with the very large distance of electrode separation itself, also can easily implement to measure.
Invention described in technical scheme 2 is in the welding supply unit described in technical scheme 1, welding torch switch is equipped with at described welding torch, microswitch is equipped with in described remote controller, carry out the micromotion of described electrode according to the making operation being combined with described welding torch switch and described microswitch, described switching mechanism switches to described mode determination according to the described predetermined operation being combined with described welding torch switch and described microswitch.
In the invention, when switching to mode determination, by the operation by being used for the micromotion carrying out the microswitch being combined with welding torch switch and remote controller, be set to the predetermined operation that the operation of such as carrying out stipulated number is at the appointed time such, thus can be easily switched to mode determination by the operation that make use of two switches.
Invention described in technical scheme 3 is in the welding supply unit described in technical scheme 2, described switching mechanism is when terminating described mode determination, according to the predetermined operation of at least one party of described welding torch switch and described microswitch, and terminate described mode determination.
In the invention, when mode determination will be terminated, by operation the welding torch switch identical with the previous switch operated when mode determination switches (beginning) or microswitch terminate mode determination, thus at the end of operation also become easy.
Invention described in technical scheme 4 is in the welding supply unit described in technical scheme 2 or 3, by the contact chip that the leading section carrying out to described electrode being provided in described welding torch powers, described electrode during described mode determination is set to short-circuit condition virtually, described switching mechanism along with according to be combined with described welding torch switch and described microswitch described predetermined operation and to the switching of described mode determination, the outstanding described electrode using the micromotion of the original respective action because realizing as the operation by described two switches, is accommodated in described contact chip.
In the invention, when switching to mode determination, because of based on being combined with original respective action, the i.e. micromotion of predetermined operation of welding torch switch and microswitch and outstanding electrode, along with the switching to mode determination realized by this predetermined operation, be incorporated in the contact chip of welding torch leading section.Thus, when wanting electrode to be set to short-circuit condition during mensuration, do not need other operation just easily can realize making the contact chip of welding torch leading section and subject side member contact and electrode is set to short-circuit condition virtually.
Invention described in technical scheme 5 is in the welding supply unit described in technical scheme 4, and described switching mechanism, along with the end of described mode determination, makes described electrode give prominence to ormal weight from described contact chip.
In the invention, electrode in the contact chip being contained in welding torch leading section when switching to mode determination, gives prominence to ormal weight along with the end of mode determination from contact chip.Thus, easily can transfer to and electrode is given prominence to and the weld job carried out.
Invention described in technical scheme 6 is in the welding supply unit described in any one of technical scheme 1 ~ 5, carry out the control of the inert gas of releasing from the leading section of described welding torch when described welding, as the exception reporting mechanism of the exception during practical measurement reported under described mode determination, adopt the releasing sound of described gas.
In the invention, during exception when reporting the practical measurement under mode determination, the releasing sound of the gas of releasing from welding torch leading section is utilized to report to operator.That is, utilizing inert gas to carry out in the bonding machine welded, the mechanism that report is abnormal need not adopted in addition, just can easily and reliably to be separated from supply unit and the operator being positioned at ate electrode reports.
Invention described in technical scheme 7 is a kind of bonding machine, and it possesses the welding supply unit described in any one of technical scheme 1 ~ 6 and forms.
In the invention, provide one no matter situation to be set how, easily can carry out the bonding machine of the mensuration of resistance value and inductance value.
Invention effect
According to the present invention, one can be provided no matter situation to be set how, the welding supply unit of the mensuration of the resistance value that the calculating easily can carrying out electrode front voltage uses and inductance value and possess the bonding machine of this welding supply unit.
Accompanying drawing explanation
Fig. 1 is the pie graph of the supply unit mainly represented in the arc welding machine of present embodiment.
Fig. 2 is the key diagram for being described the change of inductance value.
Fig. 3 is the key diagram for being described the computational methods of resistance value and inductance value.
Fig. 4 is at the pie graph that the arc welding machine used in the process of the handover operation switched to mode determination is described.
Fig. 5 is illustrating the sequential chart used in the process of the handover operation switched to mode determination.
Symbol description:
10 arc welding machines (bonding machine)
11 welding supply units
12 wire-electrode (electrode)
13 welding wire generators
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 voltage calculate mechanism, resistance value calculates mechanism, inductance value calculation mechanism, switching mechanism, exception reporting mechanism)
33 current sensors (testing agency)
34 voltage sensors (testing agency)
41 welding torch switches (console switch)
42 remote controller
42c microswitch (console switch)
45 gass collecting jar with ground-on cover plate (exception reporting mechanism)
46 by-pass valve controls (exception reporting mechanism)
TH welding torch
THa contact chip
M welding object
I output current
Ip1 current value
Ip2 current value
V output voltage
Va front voltage
R adds up to resistance value
L adds up to inductance value
L (I) function
Detailed description of the invention
Below, with reference to the accompanying drawings the embodiment after the present invention being specialized is described.
Fig. 1 represents the arc welding machine 10 of consumable electrode type.In arc welding machine 10, the wire-electrode 12 supported by welding torch TH is connected at the welding positive side lead-out terminal of supply unit 11, at the minus side lead-out terminal connecting welding object M of this supply unit 11, by the DC output power that generated by this supply unit 11 to the power supply of wire-electrode 12, carry out arc welding.Now, because wire-electrode 12 is consumed when welding, give so welding wire generator 13 corresponds to consumption.To wire-electrode 12 and welding object M, via the power cable 14 be connected with the lead-out terminal of supply unit 11 to supply output power.
Welding supply unit 11 is the devices AC input power of the three-phase provided from source power supply being transformed to the DC output power being suitable for arc welding.AC input power is transformed to direct current by the rectifier smoothing circuit 21 be made up of diode bridge and smmothing capacitor, and the direct current after conversion is transformed to high-frequency alternating current by inverter circuit 22.Inverter circuit 22 is made up of the bridgt circuit employing the switch element TR such as 4 IGBT, and the PWM implemented based on control device 31 controls.
The high-frequency alternating current generated by inverter circuit 22 is transformed to the secondary side alternating current being adjusted to assigned voltage value by welding transformer 23.The secondary side alternating current of welding transformer 23, by employing rectification circuit 24 and the direct current reactor 25 of diode, is transformed to the DC output power being suitable for arc welding.
The direct current reactor 25 of present embodiment uses the supersaturation reactor with supersaturation characteristic.As shown in Figure 2, the high current zone comprising the ratio rated current value Ia of current value Ip1 large is fixing usual characteristic area A1 with the MIN inductance value La of necessity to the characteristic of direct current reactor 25.On the other hand, the low current region becoming below rated current value Ia is the supersaturation characteristic area A2 (current value Ip2, inductance value Lb) along with the minimizing inductance value of current value increases linearly gradually.Namely, by adopting the direct current reactor 25 of such characteristic, thus it is little in high current zone inductance value, so little on the impact for the level and smooth Waveform Control of electric current, in low current region by increasing inductance value thus preventing arc cutting, generate at all suitable DC output power of whole galvanic areas.
As shown in Figure 1, the switch element TR of control device 31 pairs of inverter circuits 22 implements PWM and controls, and carries out the control making DC output power often for appropriate value.Now, control device 31 carries out the detection of output current I constantly and output voltage V, carries out the feedback controlled to PWM based on the output current I detected and output voltage V.
That is, the power line of the minus side lead-out terminal in supply unit 11 possesses current sensor 33, and control device 31 detects the output current I of supply unit 11 in handling part (CPU) 32 via this current sensor 33.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 unit 11 in handling part 32 via this voltage sensor 34.Control device 31, based on the output current I detected constantly by handling part 32 and output voltage V, carries out the calculating of the dutycycle (duty) of PWM control, generates the pwm control signal exported to inverter circuit 22.
At this, in PWM controls, as the output voltage V for controlling, preferred employing correctly produces the front voltage Va of the wire-electrode 12 of electric arc, but the direct detection of front voltage Va is difficult.For this reason, voltage variety from voltage sensor 34 to electrode 12 remains in storage device (diagram slightly) by control device 31 in advance, the output voltage V detected constantly is carried out to the correction of this voltage variety, to obtain front voltage Va, and the PWM implementing have employed calculated front voltage Va controls.
But, in voltage variety from voltage sensor 34 to electrode 12, there is the voltage variety (from the voltage variety by resistance value R1 and inductance value L1 caused by of rectification circuit 24 to lead-out terminal) of supply unit 11 inside and the voltage variety (from lead-out terminal via the voltage variety that by resistance value R2 and inductance value L2 caused of power cable 14 to electrode 12 front end) of outside.In order to the impact not by using state, the builtin voltage variable quantity of supply unit 11 can be enrolled in advance the calculating of front voltage Va as correction term, but external voltage variable quantity is because the cable of power cable 14 is long or any intermediate position (straight-run or winding lay, its winding number) etc., condition are different because of each user, so be largely subject to the impact of the change of resistance value R2, particularly inductance value L2.
For this reason, user arranges arc welding machine 10 at the scene, also comprise when becoming proper use of state in being laid in of power cable 14, measure the resistance value R and inductance value L that obtain after being added up to by the resistance value R2 of the resistance value R1 of inside and inductance value L1 and outside and inductance value L2.The total resistance value R that mensuration obtains and total inductance value L is maintained in control device 31.
In addition, the supply unit 11 of present embodiment possesses mode determination, this mode determination performs the process of the mensuration for carrying out above-mentioned total resistance value R and total inductance value L, based on the operation (input of operation signal) of various switch described later, control device 31 can move to mode determination.In addition, during mensuration under mode determination, need to make to become short-circuit condition between wire-electrode 12 and welding object M, but in the present embodiment as shown in Figure 1, not by wire-electrode 12 and welding object M direct short-circuit, but make to be provided in the leading section of welding torch TH and carry out to wire-electrode 12 the contact chip THa that powers and welding object M short circuit measures.In this case, the special fixtures that also can make short circuit uses.
If be described in detail mode determination, as shown in Figure 3, first, inverter circuit 22 is worked, and output current I increases to current value Ip1.This current value Ip1 is in the monomer of direct current reactor 25 with supersaturation characteristic, the current value of the usual characteristic area A1 fixed with inductance value La.In fact, as shown in Figure 2, because characteristic offsets because of any intermediate position etc. of power cable 14, so add up to inductance value L to fix with the value La1 of skew, the current value of the usual characteristic area A1 considering this side-play amount is set to.Further, measure with the average voltage level Ve in the interval of such current value Ip1 maintenance.Thus, first total resistance value R is calculated by formula (a) below.
R＝Ve/Ip1···(a)
Then, the action of inverter circuit 22 is stopped, timing from moment T0 now.Simultaneously, carry out the sampling of the output current I changed for the starting point moment with moment T0, the moment reached as the current value Δ Ip1 (Ip1 × 36.8%) of the current attenuation amount corresponding to time constant is set to T1, tries to achieve time (time constant) τ 1 between this moment T1-T0.Thus, the total inductance value La1 (being inductance value La in the monomer of reactor 25) changed at usual characteristic area A1 is calculated by following formula (b).
La1＝R·τ1(＝Ve·τ1/Ip1)···(b)
Then, again make inverter circuit 22 action, output current I is adjusted to the rated current value Ip2 in supersaturation characteristic area A2.After the adjustment, the action of inverter circuit 22 is again made to stop, timing from moment T2 now.Simultaneously, carry out the sampling of the output current I changed for the starting point moment with moment T2, the moment reached as the current value Δ Ip2 (Ip2 × 36.8%) of the current attenuation amount corresponding to time constant is set to T3, tries to achieve time (time constant) τ 2 between this moment T3-T2.Thus, the total inductance value Lb1 (being inductance value Lb in the monomer of reactor 25) changed at supersaturation characteristic area A2 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 usual characteristic area A1 calculated and the total inductance value Lb1 of supersaturation characteristic area A2 is augmented by straight line, obtains the function L (I) adding up to inductance value L as electric current I.Then, the function L (I) of the total inductance value L obtained like this and the total resistance value R that previously obtained is remained in control device 31.Thus, mode determination terminates.
Then, control device 31, when welding action, calculates front voltage Va according to output current I constantly and output voltage V by following formula (d).
Va＝V-L(I)·dI/dt-RI ···(d)
In addition, if with concrete numeric representation, the current value Ip1=400 [A] of output current I is exported 10 [ms] clock according to the connection of inverter circuit 22, afterwards, inverter circuit 22 is disconnected.When average voltage level Ve is during this period 4 [V], according to above-mentioned formula (a), calculate and add up to resistance value R, R=Ve/Ip1=4/400=0.01 [Ω].
Then, the current value Δ Ip1 that current value Ip1 becomes the current attenuation amount suitable with timeconstantτ 1 is Δ Ip1=400 × 0.368=147 [A], if the timeconstantτ 1 that after making inverter circuit 22 disconnection, output current I reaches 147 [A] from 400 [A] is 3 [ms], then according to above-mentioned formula (b)
La1＝R·τ1＝0.01×3＝0.03[mH]
In usual characteristic area A1, calculate the total inductance value La1 of the inductance value La of the monomer comprising direct current reactor 25.In addition, above-mentioned current value Ip1 needs to infer according to the specification of the direct current reactor 25 used in advance, and is set as the value not reaching supersaturation characteristic area A2.
Then, again make inverter circuit 22 connect, output current I is set to such as suitable with the minimum current of the arc welding machine 10 current value Ip2=20 [A] in supersaturation characteristic area A2, export 10 [ms] clock, afterwards, inverter circuit 22 is made to turn off.The current value Δ Ip2 that current value Ip2 becomes the current attenuation amount suitable with timeconstantτ 2 is
ΔIp2＝20×0.368＝7[A]
If the timeconstantτ 2 that after disconnecting inverter circuit 22, output current I reaches 7 [A] from 20 [A] is 10 [ms], then according to above-mentioned formula (c),
Lb1＝R·τ2＝0.01×10＝0.1[mH]
In supersaturation characteristic area A2, calculate the total inductance value Lb1 of the inductance value Lb of the monomer comprising direct current reactor 25.
Then, by carrying out the straight line supplement of these La1=0.03 [mH], Lb1=0.1 [mH], thus obtain the function L (I) adding up to inductance value L, and according to this function and the total resistance value R previously to have obtained, front voltage Va constantly can be calculated according to above-mentioned formula (d).In addition, the above-mentioned concrete numerical value enumerated is an example, is not defined in this.
Even if having in the welding supply unit 11 of the present embodiment of the direct current reactor 25 of supersaturation characteristic and also can suitably calculate front voltage Va adopting like this, the control constantly of inverter circuit 22 can be carried out thus more rightly based on the front voltage Va suitably calculated.Therefore, by with the complementary effect of reactor 25 adopting supersaturation characteristic, the DC output power of whole galvanic areas all more suitably arc welding can be created on.
Although according to the operation of the console switch be equipped with in supply unit 11 (diagram slightly), shift to above-mentioned mode determination, but in the present embodiment as shown in Figure 4, being used in the welding torch switch (welding torch SW) 41 that welding torch TH is equipped with and the remote controller 42 be equipped with at welding wire generator 13, also can shifting to mode determination by carrying out in the position leaving supply unit 11 operating.
The trigger-type welding torch switch 41 be switched on by drawing is equipped with at welding torch TH.Welding torch switch 41 manually carries out the making operation that will start to weld by operator, provide electric power thus to wire-electrode 12.In addition, by welding torch switch 41 with operate together with microswitch described later (fine motion SW) 42c of remote controller pairs setting system, carry out the micromotion of wire-electrode 12.Specifically, if connected by welding torch switch 41 in the making operation of microswitch 42c, then sent the wire-electrode 12 of specific length by making operation, adjustment wire-electrode 12 is from the overhang of the leading section of welding torch TH.
Remote controller 42 can observe welding portion on one side practically while carry out adjustment, the micromotion of output current I and output voltage V in order to operator originally near wire-electrode 12, and was arranged on welding wire generator 13.Specifically, in remote controller 42, the electric current being equipped with the rotary operation type for adjusting output current I and output voltage V with and voltage rotary switch (volumeswitch) 42a, 42b and the microswitch 42c for the push button that carries out micromotion.According to the various operations of remote controller 42, even if do not operate in supply unit 11 side, also near welding portion, output current I, the adjustment of output voltage V and micromotion can easily be carried out in position, be particularly suitable for the situation etc. that welding object M is bar or macrostructure thing, need power cable 14 to be the situation of the length of tens of [m].
Then, use such welding torch switch 41 and the microswitch 42c of remote controller 42, because operator carries out the predetermined operation of the reference Fig. 5 pre-established, according to the input of the operation signal corresponding with this predetermined operation to control device 31, this control device 31 switches to above-mentioned mode determination.
First, under the state that making operation is carried out to the microswitch 42c of operator's remote controller 42, in stipulated time T (such as several seconds), 5 making operations are carried out to welding torch switch 41.Due to the operation that this operation is identical with the operation of the micromotion implementing wire-electrode 12, so pass through 5 making operations of the welding torch switch 41 under the on-state of microswitch 42c, wire-electrode 12 gives prominence to the overhang of 5 times.Terminate if originally operate in stipulated time T, then the control device 31 of supply unit 11 is in order to switch to mode determination, the wire-electrode 12 outstanding by previous micromotion is made to retreat more than (retract) this overhang, wire-electrode 12 is received in the contact chip THa of the leading section of welding torch TH, afterwards, mode determination is switched to.
Then, operator makes the contact chip THa of the leading section of welding torch TH contact with welding object M, virtually wire-electrode 12 is set to short-circuit condition (with reference to Fig. 1).If connect welding torch switch 41 under this short-circuit condition, then taking this as an opportunity starts practical measurement.Practical measurement carries out terminating after about the several seconds, in order to calculate front voltage V, and practical measurement and obtain adding up to inductance value L (function) and adding up to resistance value R a to be kept by the storage device in control device 31.
Then, at the end of practical measurement, operator carries out 5 making operations to welding torch switch 41.By carrying out this operation, carry out making the wire-electrode 12 of accommodating in the contact chip THa of the leading section of welding torch TH give prominence to the fine motion of ormal weight, mode determination terminates.
In addition, in the mode determination comprising practical measurement, when measured value mistake when creating the poor short circuit of fore-end of welding torch TH, minute is not enough etc. mensuration mistake or achieving abnormal measured value etc., carry out this exception reporting to operator.This exception reporting is that the display part etc. by being equipped with in supply unit 11 carries out reporting, but when using welding torch switch 41 or remote controller 42 to operate, supply unit 11 is left, so need to report in its vicinity because hypothesis operator is positioned at position near welding torch TH.For this reason, in hypothesis be while release inert gas (carbon dioxide or argon gas, its mist etc.) while when carrying out arc welding machine 10 of arc welding from the leading section of welding torch TH, the control device 31 of supply unit 11 is by controlling by-pass valve control 46, utilize the releasing sound of the gas of releasing from the leading section of welding torch TH to carry out previous exception reporting, above-mentioned by-pass valve control 46 is used for controlling the supply from the inert gas of gas collecting jar with ground-on cover plate 45.
Next, the distinctive effect of notebook embodiment.
(1) supply unit 11 (control device 31) has the mode determination measuring the total resistance value R to the front end of electrode 12 relevant to the calculating of front voltage Va and add up to inductance value L (being function L (I) in the present embodiment).And, when switching to mode determination, by carrying out the predetermined operation combined with microswitch 42c by the welding torch switch 41 of the remote controller pairs setting system at welding torch TH and welding wire generator 13, thus separate with the original respective action of operated switch 41,42c the switching carried out to described mode determination.Namely, by adopting switch 41, the 42c for carrying out the action originally separated be equipped with in welding torch TH remote controller 42, thus need not arrange for implementing the switch measured in addition, by being positioned at these welding torches TH near electrode 12 and the switch 41 of remote controller 42, the predetermined operation of 42c, thus easily implement to measure while the state of the fore-end of electrode 12 being confirmed when measuring.Thus, even if under the situation that arranges of supply unit 11 self of separating very large distance with electrode 12, also can easily implement to measure.
(2) when switching to mode determination, by being set to predetermined operation by being used for carrying out being combined with welding torch switch 41 with the operation of the micromotion of microswitch 42c, thus by make use of two switches 41, the operation of 42c easily can switch to mode determination, afore mentioned rules operation carries out the such operation of 5 operations to welding torch switch 41 under referring to the state of having carried out making operation to microswitch 42c in the present embodiment in stipulated time T.
(3) at the end of mode determination, by the operation welding torch switch 41 identical with the switch operated when previous mode determination switches (beginning) and terminate mode determination, thus at the end of operation also become easy.
(4) when switching to mode determination, because of based on being combined with welding torch switch 41 and original respective action, the i.e. micromotion of the predetermined operation of microswitch 42c and outstanding electrode 12, along with the switching to mode determination realized by predetermined operation, and be incorporated in the contact chip THa of the leading section of welding torch TH.Thus, when electrode 12 will be set to short-circuit condition when measuring, do not need operation bidirectional, can easily realize making the contact chip THa of the leading section of welding torch TH contact with subject side component (welding object M) and electrode 12 is set to short-circuit condition virtually.
(5) when switching to mode determination, the electrode 12 of accommodating in the contact chip THa of the leading section of welding torch TH gives prominence to ormal weight along with the end of mode determination from contact chip THa.Thus, easily can be transferred to and make electrode 12 outstanding and the weld job that carries out.
(6), during exception when reporting the practical measurement under mode determination, the releasing sound of the gas of releasing from the leading section of welding torch TH is utilized to carry out this report to operator.That is, when utilizing inert gas to carry out the bonding machine as the present embodiment 10 welded, the mechanism for report need not be adopted in addition, can easily and reliably to away from supply unit 11 and the operator be positioned near electrode 12 report.
In addition, embodiments of the present invention also can carry out following change.
In the above-described embodiment, as predetermined operation when switching to mode determination, have employed and in stipulated time T, the such operation of 5 operations be carried out to welding torch switch 41 under the state that making operation has been carried out to microswitch 42c, but the switch used and predetermined operation are not limited thereto, can suitably change.In addition, as the predetermined operation at the end of mode determination, have employed and the such operation of 5 operations is carried out to welding torch switch 41, but this also suitably can change.
In the above-described embodiment, come switch to mode determination or terminate mode determination based on have employed the predetermined operation that welding torch switch 41 and microswitch 42c carry out, but other switch different from these switches be equipped with in welding torch TH or remote controller 42 also can be adopted to carry out.Such as, the electric current of the rotary operation type be equipped with in remote controller 42 also can be adopted to use and voltage rotary switch 42a, 42b.In addition, the console switch beyond welding torch switch 41, microswitch 42c, rotary switch 42a, 42b also can adopt these switches when being provided in welding torch TH or remote controller 42.
Employ the direct current reactor 25 with supersaturation characteristic in the above-described embodiment, but also can use there is the general reactor that current value and inductance value fix the linear characteristic of change.In addition, if use such reactor, just can obtain inductance value (not needing to obtain function) by the mensuration of primary current attenuation, thus the calculating of front voltage Va becomes easy.
In the above-described embodiment, during exception when reporting the practical measurement under mode determination, have employed the releasing sound of the gas of releasing from the leading section of welding torch TH, but when gas release beyond sound possess the device of sound generating mechanism or lighting means, also can utilize each mechanism.In this case, the mode be equipped with at the welding torch TH be positioned near electrode 12 or remote controller 42, welding wire generator 13 etc. is preferably adopted.In addition, the mode of not carrying out exception reporting can also be adopted.
Claims (7)
1. a welding supply unit, it possesses DC power conversion is the inverter circuit of high-frequency alternating current, the welding transformer of the Voltage Cortrol of the alternating current after converting, the DC converting mechanism being suitable for the DC output power welded is generated with the secondary side alternating current according to this welding transformer, it also possesses control device, this control device is used in the supply of electrode the electric arc welded based on generated described output power and produces between welding object, and the front voltage of described electrode is calculated based on the output current detected with the testing agency in supply unit by this welding and output voltage, described inverter circuit is controlled based on the front voltage calculated,
Wherein, described control device has the mode determination performing the process comprising resistance value calculating mechanism and inductance value calculation mechanism, and possess front voltage and calculate mechanism, described resistance value calculates mechanism and described electrode is set to short-circuit condition and processes, the magnitude of voltage of described output voltage when being set to rated current value based on the described output current action by described inverter circuit produced, calculate the total resistance value on the path till described electrode front end, described electrode is set to short-circuit condition and processes by described inductance value calculation mechanism, current attenuation amount when being set as rated current value based on the described output current action by described inverter circuit produced, calculate the total inductance value on the path till described electrode front end, described front voltage calculates mechanism's voltage variety relevant to the described total resistance value on the path to described electrode front end and described total inductance value to the magnitude of voltage correction of the described output voltage detected by described testing agency, calculate described front voltage,
Described welding supply unit also possesses switching mechanism, this switching mechanism can according to the predetermined operation utilizing at least one switch in various console switch to carry out, differently switch described mode determination with the original respective action of operated switch, the remote controller be equipped with in the welding wire generator given of this electrode is carried out in the consumption be arranged at respectively when welding when carrying out the support of described electrode and the welding torch of power supply and correspond to described electrode being wire-electrode of described various console switch.
2. welding supply unit according to claim 1, is characterized in that,
Be equipped with welding torch switch at described welding torch, be equipped with microswitch in described remote controller, carry out the micromotion of described electrode according to the making operation being combined with described welding torch switch and described microswitch,
Described switching mechanism switches to described mode determination according to the described predetermined operation being combined with described welding torch switch and described microswitch.
3. welding supply unit according to claim 2, is characterized in that,
Described switching mechanism, when terminating described mode determination, according to the predetermined operation of at least one party of described welding torch switch and described microswitch, and terminates described mode determination.
4. welding supply unit according to claim 2, is characterized in that,
By the contact chip that the leading section carrying out to described electrode being provided in described welding torch powers, described electrode during described mode determination is set to short-circuit condition virtually,
Described switching mechanism along with according to be combined with described welding torch switch and described microswitch described predetermined operation and to the switching of described mode determination, the outstanding described electrode using the micromotion of the original respective action because realizing as the operation by described two switches, is accommodated in described contact chip.
5. welding supply unit according to claim 4, is characterized in that,
Described switching mechanism, along with the end of described mode determination, makes described electrode give prominence to ormal weight from described contact chip.
6. the welding supply unit according to any one of Claims 1 to 5, is characterized in that,
Carry out the control of the inert gas of releasing from the leading section of described welding torch when described welding,
As the exception reporting mechanism of the exception during practical measurement reported under described mode determination, adopt the releasing sound of described gas.
7. a bonding machine, is characterized in that, is configured to the welding supply unit possessed described in any one of claim 1 ~ 6.
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| JP2011015510A JP5756298B2 (en) | 2011-01-27 | 2011-01-27 | Welding power supply and welding machine |
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| KR101427634B1 (en) * | 2012-08-29 | 2014-08-07 | (주)퍼스트파워일렉트로닉스 | Self Controllabe Welding Power Apparatus |
| WO2016075874A1 (en) * | 2014-11-11 | 2016-05-19 | パナソニックＩｐマネジメント株式会社 | Welding device and welding method |
| CN107824955B (en) * | 2017-10-23 | 2023-06-23 | 广东省焊接技术研究所（广东省中乌研究院） | Tool and method for double-shaft shoulder friction stir welding measurement and positioning |
| US11623292B2 (en) * | 2019-03-29 | 2023-04-11 | Lincoln Global, Inc. | Real time resistance monitoring of an arc welding circuit |
| JP7265308B2 (en) * | 2019-08-30 | 2023-04-26 | 株式会社ダイヘン | welding equipment |
| JP7339147B2 (en) * | 2019-12-18 | 2023-09-05 | ファナック株式会社 | arc welding robot system |
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| JP2012152806A (en) | 2012-08-16 |
| CN102615385A (en) | 2012-08-01 |
| JP5756298B2 (en) | 2015-07-29 |
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