CN100509239C - Output controlling means for power source of electric arc welding - Google Patents
Output controlling means for power source of electric arc welding Download PDFInfo
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- CN100509239C CN100509239C CNB2006100036935A CN200610003693A CN100509239C CN 100509239 C CN100509239 C CN 100509239C CN B2006100036935 A CNB2006100036935 A CN B2006100036935A CN 200610003693 A CN200610003693 A CN 200610003693A CN 100509239 C CN100509239 C CN 100509239C
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- 238000003466 welding Methods 0.000 title claims abstract description 125
- 238000010891 electric arc Methods 0.000 title claims abstract description 21
- 238000000034 method Methods 0.000 claims abstract description 16
- 229910000679 solder Inorganic materials 0.000 abstract 1
- 238000001514 detection method Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 7
- 239000002184 metal Substances 0.000 description 7
- 229910052751 metal Inorganic materials 0.000 description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
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Abstract
The invention relates to an output control method for electric arc welded electrical source, which comprises feeding solder wire in a preset feeding speed, and calculating an error amplifying value (delta P) between a welding performance number (Pw) of the product of welding current value (Iw) and welding voltage value (Vw) and a preset power set value (Pr), subtracting the error amplifying value (delta P) from the preset welding voltage set value (Vr) to calculate a voltage control set value (Vcr), controlling the output of the welded electrical source to lead the voltage control set value (Vcr) to be equal with the welded voltage value (Vw) to do electric arc welding, calculating welding current set value (Ir) which is corresponded with the set value (Fr) of the wire feeding speed, and setting the power set value (Pr) to be the product of the welding current set value (Ir) and the welding voltage set value (Vr).
Description
Technical field
The present invention relates to a kind of being used for,, and improve the output control method of electric arc welding power supply of the stability of welded condition by output based on the long-pending bonding power value control source of welding current of welding current value and welding voltage value in melt pole electrical arc welding.
Background technology
In the melt pole electrical arc welding, give welding wire to mother metal, and supply with welding current Iw and weldingvoltage Vw, between welding wire and mother metal, produce electric arc and weld from the source of welding current as consumable electrode with predetermined wire feed rate Wf.The source of welding current of this moment generally uses the power supply of constant-voltage characteristic.Promptly control the output of the source of welding current, so that weldingvoltage Vw equates with the weldingvoltage setting value Vr that is scheduled to.Use the reasons are as follows of constant-voltage characteristic.Be and obtained good welding quality, arc length need be maintained appropriate value.In order to make arc length and weldingvoltage Vw roughly have proportionate relationship, detect arc length with weldingvoltage Vw, by controlling so that this detected value equates and suitableization of realization arc length with the weldingvoltage setting value Vr that is equivalent to suitable arc length.
Welding as the representative of melt pole electrical arc welding has CO2 welding and meets (CO
2Welding), MAG welding, MIG welding etc.These weldings are 100～200A when following in average welding current value, are in short circuiting arc welding, if current value uprises, then are in globular transfer or spray transfer.Fig. 4 is an example of the oscillogram of welding current Iw in this short circuiting arc welding and weldingvoltage Vw.As shown in the figure, among the Ts, shown in figure (A), welding current Iw rises during the short circuit of welding wire and mother metal short circuit, and shown in figure (B), weldingvoltage Vw becomes low short-circuit voltage value.Among the arc period Ta that electric arc produces, shown in figure (A), welding current Iw descends, and shown in figure (B), becomes the high arc voltage value of weldingvoltage Vw.Shown in figure (B), the output of the control source of welding current is so that the smooth value of weldingvoltage Vw and weldingvoltage set value Vr equates.Next, Fig. 5 is welding current Iw in the welding of above-mentioned globular transfer and the oscillogram of weldingvoltage Vw.Shown in figure (A), welding current Iw is die-offed when carrying out the transition to molten from welding wire, slowly rises after this.Each period T f repeats the transition of molten drop, and its each current value changes.On the other hand, shown in figure (B), weldingvoltage Vw because arc length is elongated and increase suddenly, slowly shortened along with arc length afterwards and descends when the droplet transfer.Shown in figure (B), the output of the control source of welding current is so that the smooth value of weldingvoltage Vw and weldingvoltage set value Vr equates.
In the welding of above-mentioned melt pole electrical arc, voltage power control has now been proposed, it as basic control, and increases control as the long-pending bonding power value Pw of welding current value Iw and welding voltage value Vw with constant-voltage characteristic.Bonding power value Pw is and welding wire is reached the value that the heat input of mother metal is had relation.Thereby this voltage power control suitably changes arc length by constant voltage control, and by partly adding heat input control in the power control, improves (for example with reference to patent documentation 1～3) by so further realization welding quality.
Fig. 6 is the example of block diagram of the source of welding current that adopts the voltage power control of above-mentioned prior art.Below, with reference to this figure, each block diagram is described.
Electric power main circuit MC as input, carries out the output control of inversion control, controllable silicon phase controlling etc. according to voltage error amplifying signal △ V described later with the source power supply of 3 phase 200V etc., and output is suitable for the welding current Iw and the weldingvoltage Vw of arc welding.The rotation of welding wire 1 by the thread delivering roller 5 that combines with wire feeding motor M, be fed to through in the welding gun 4, its with mother metal 2 between generation electric arc 3.
Voltage detecting circuit VD detects weldingvoltage Vw, and voltage sense signal Vd.Current detection circuit ID detects welding current Iw, and output current detection signal Id.Bonding power counting circuit PW carries out the multiplying between above-mentioned current detection signal Id and the voltage detection signal Vd, output bonding power signal Pw=Id * Vd.Power setting circuit PR, output predetermined electric power setting signal Pr.Power error amplifying circuit EP amplifies power output amplifying signal △ P to the error between above-mentioned power setting signal Pr and the above-mentioned bonding power signal Pw.
Weldingvoltage initialization circuit VR, the weldingvoltage setting signal Vr that output is predetermined.Subtraction circuit SB deducts above-mentioned power error amplifying signal △ P from above-mentioned weldingvoltage setting signal Vr, output voltage control setting signal Vcr=Vr-△ P.Voltage error amplifying circuit EV amplifies output voltage amplifying signal △ V with the error between above-mentioned Control of Voltage setting signal Vcr and the above-mentioned voltage detection signal Vd.
The predetermined wire feed rate setting signal Fr of wire feed rate initialization circuit FR output.Wire-feeding control circuit FC, output wire feed control signal Fc also controls wire feeding motor M, to reach the wire feed rate that is equivalent to above-mentioned wire feed rate setting signal Fr.
As shown in the figure, MC exports control to electric power main circuit, so that equate with weldingvoltage Vw by the Control of Voltage setting signal Vcr behind the power error amplifying signal △ P correction weldingvoltage setting signal Vr.Thereby, be implemented in the control that increases power control in the constant voltage control.
In general melt pole electrical arc welding power supply, the weldingvoltage setting signal Vr that will set arc length according to welding condition is set at appropriate value with the wire feed rate setting signal Fr that sets wire feed rate.About two setting signals, exist based on the huge data of savings up to the present and long-term experience and skilled technical ability.Therefore, if determined welding condition, then can easily two setting signals be set at appropriate value.
In the above-mentioned prior art, the project that should set also needs power setting signal Pr is set at appropriate value except above-mentioned two setting signal Vr, Fr in Fig. 6.This power setting signal Pr need be to each welding condition change setting.But the savings data about why the appropriate value of this power setting signal Pr is not worth according to various welding conditions do not have experience yet.Therefore, power setting signal Pr suitably being changed need the more time of cost.Promptly, therefore in fact do not popularize owing to adopt the source of welding current using method complexity of voltage power control.
Patent documentation 1: the spy opens clear 61-No. 71177 communiques,
Patent documentation 2: the spy opens communique 2002-No. 273569,
Patent documentation 3: the spy opens communique 2002-No. 361418.
Summary of the invention
At this, the invention provides the output control method of a kind of establishing method summary that can make the voltage power control type source of welding current and wieldy electric arc welding power supply.
In order to solve above-mentioned problem, the output control method of the electric arc welding power supply of the present invention's the 1st mode, be that welding wire is being given with predetermined wire feed rate, and calculate as the long-pending bonding power value of welding current value and welding voltage value and the error value of magnification between the predetermined electric power setting value, from predetermined weldingvoltage setting value, deduct this error value of magnification and calculate the Control of Voltage setting value, the output of the control source of welding current so that this Control of Voltage setting value and described welding voltage value carry out about equally in the output control method of electric arc welding power supply of arc welding, it is characterized in that, calculate the welding current setting value corresponding with the setting value of described wire feed rate, it is long-pending with described weldingvoltage setting value that described set value of the power is set at this welding current setting value.
In addition, the output control method of the electric arc welding power supply of mode 2 of the present invention, it is characterized in that, welding wire is given with predetermined wire feed rate, and calculate differential value as the long-pending bonding power value of welding current value and welding voltage value, deduct this bonding power differential value and calculate the Control of Voltage setting value from predetermined source of welding current setting value, the output of the control source of welding current is so that this Control of Voltage setting value is carried out arc welding about equally with described welding voltage value.
The invention effect
According to the 1st above-mentioned invention, when voltage power control electric arc welding power supply, it is long-pending with the weldingvoltage setting value that set value of the power is automatically made the welding current setting value.Therefore, also can only set the wire feed rate setting value and weldingvoltage setting value corresponding as in the past, not need the setting of complicated set value of the power with the welding current setting value.Its result has improved the operability of the source of welding current of voltage power control type.
According to the 2nd above-mentioned invention, when voltage power control electric arc welding power supply, owing to use the differential value of bonding power value, and do not need the setting power setting value.Therefore, also can only set wire feed rate setting value and weldingvoltage setting value as in the past.Its result can improve the operability of the source of welding current of voltage power control type.
Description of drawings
Fig. 1 is the block diagram of output control method of the electric arc welding power supply of the relevant embodiments of the present invention 1 of expression.
Fig. 2 is the graph of a relation between wire feed rate setting signal Fr and the welding current setting signal Ir.
Fig. 3 is the block diagram of output control method of the electric arc welding power supply of the relevant embodiments of the present invention 2 of expression.
Fig. 4 is the current/voltage oscillogram of short circuiting arc welding of the prior art.
Fig. 5 is the current/voltage oscillogram of globular transfer welding of the prior art.
Fig. 6 is the block diagram of the output control method of expression electric arc welding power supply of the prior art.
Among the figure: 1-welding wire; 2-mother metal; 3-electric arc; 4-welding gun; 5-thread delivering roller; BP-power differential circuit; Bp-power differential signal; EP-power error amplifying circuit; EV-voltage error amplifying circuit; FC-wire-feeding control circuit; Fc-wire feed control signal; FR-wire feed rate initialization circuit; Fr-wire feed rate setting signal; ICR-welding current setting value counting circuit; ID-current detection circuit; Id-current detection signal; Ir-welding current setting signal; Iw-welding current; M-wire feeding motor; MC-electric power main circuit; PCR-set value of the power counting circuit; PR-power setting circuit; Pr-power setting signal; PW-bonding power counting circuit; Pw-bonding power (value/signal); SB-subtraction circuit; SB2-the 2nd subtraction circuit; Ta-arc period; Tf-cycle; During Ts-short circuit; Vcr-Control of Voltage setting signal; VD-voltage detecting circuit; Vd-voltage detection signal; VR-weldingvoltage initialization circuit; Vr-weldingvoltage is set (value/signal); Vw-weldingvoltage; Wf-wire feed rate; △ P-power error amplifying signal; △ V-voltage error amplifying signal.
The specific embodiment
Below, with reference to accompanying drawing, embodiments of the present invention are described.
(embodiment 1)
Fig. 1 is the block diagram of output control method of the electric arc welding power supply of the relevant embodiments of the present invention 1 of expression.In the figure, the frame identical with above-mentioned Fig. 6 given same-sign, and omits its explanation.Below, with reference to accompanying drawing, the frame shown in the with dashed lines different with Fig. 6 is described.
Welding current setting value counting circuit ICR as input, calculates wire feed rate setting signal Fr and output welding current setting signal Ir each welding condition according to predetermined relation.Fig. 2 represents an example of this relation.Fig. 2 represents the relation between wire feed rate setting signal Fr and the welding current setting signal Ir.In Fig. 2, L1 is the situation of the iron and steel welding wire of diameter 1.2mm, and L2 is that diameter is the situation of the iron and steel welding wire of 1.6mm, and distance is the situation of 15mm between power supply chip/mother metal.For example, in L1, Ir=150A during Fc=4m/min.The average welding current value of the energising when this relation expression is welded with each wire feed rate is known general data.
Set value of the power counting circuit PCR as input, carries out the multiplying of two values, power output setting signal Pr=Ir * Vr with above-mentioned welding current setting signal Ir and weldingvoltage setting signal Vr.In addition action is identical with above-mentioned Fig. 6.Welding current setting signal Ir as mentioned above, represents the average welding current value corresponding with wire feed rate, and weldingvoltage setting signal Vr represents the average welding voltage value corresponding with suitable arc length.Thereby the long-pending power setting signal Pr as two values represents the suitable heat input in each welding condition.Therefore, can be according to the power setting signal Pr in welding current setting signal Ir and the weldingvoltage setting signal Vr setting voltage power control automatically.As mentioned above, welding current setting signal Ir calculates by wire feed rate setting signal Fr, so the result also can only set wire feed rate setting signal Fr and weldingvoltage setting signal Vr as in the past in the source of welding current of Fig. 1.
(embodiment 2)
Fig. 3 is the block diagram of output control method of the electric arc welding power supply of the relevant embodiments of the present invention 2 of expression.In the figure, in the frame identical, give same-sign and omit its explanation with above-mentioned Fig. 6.Below, with reference to this figure, the frame that dot different with Fig. 6 described.
Power differential circuit BP calculates the differential value of bonding power signal Pw, power output differential signal Bp=dPw/dt.The 2nd subtraction circuit SB2 deducts above-mentioned power differential signal Bp from weldingvoltage setting signal Vr, output voltage control setting signal Vcr=Vr-Bp.In addition action is identical with above-mentioned Fig. 6.
In the embodiment 2, realize voltage power control by utilizing power differential signal Bp.By like this, suppress the variation of the power in the welding, realize the stabilisation of heat input, realize the raising of weldability.In embodiment 2, also can only set wire feed rate setting signal Fr and weldingvoltage setting signal Vr as in the past.
Claims (1)
1, a kind of output control method of electric arc welding power supply; That welding wire is given with predetermined wire feed rate; And the error value of magnification between the set value of the power of calculating the long-pending bonding power value of welding current value and welding voltage value and being scheduled to; From predetermined weldingvoltage setting value, deduct this error value of magnification and calculate the Control of Voltage setting value; The output of the control source of welding current is so that this Control of Voltage setting value and described welding voltage value carry out the output control method of the electric arc welding power supply of arc welding about equally; It is characterized in that
Calculate the welding current setting value corresponding with the setting value of described wire feed rate, it is long-pending with described weldingvoltage setting value that described set value of the power is set at this welding current setting value.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2005014934A JP2006198668A (en) | 2005-01-24 | 2005-01-24 | Method for controlling arc welding power output |
| JP2005014934 | 2005-01-24 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1810430A CN1810430A (en) | 2006-08-02 |
| CN100509239C true CN100509239C (en) | 2009-07-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006100036935A Expired - Fee Related CN100509239C (en) | 2005-01-24 | 2006-01-11 | Output controlling means for power source of electric arc welding |
Country Status (2)
| Country | Link |
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| JP (1) | JP2006198668A (en) |
| CN (1) | CN100509239C (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2093009B1 (en) * | 2006-10-19 | 2016-08-31 | Panasonic Intellectual Property Management Co., Ltd. | Method for controlling arc welding and arc welding apparatus |
| JP5426076B2 (en) * | 2007-02-19 | 2014-02-26 | 株式会社ダイヘン | Arc welding bead shape simulation device |
| JP5160961B2 (en) * | 2008-05-26 | 2013-03-13 | 株式会社ダイヘン | Feed control method for consumable electrode arc welding |
| JP5813338B2 (en) * | 2011-03-01 | 2015-11-17 | 株式会社ダイヘン | Output control method for clad arc welding |
| CN102615387A (en) * | 2012-03-02 | 2012-08-01 | 深圳麦格米特电气股份有限公司 | Method for controlling electric-arc welding power supply |
| US9333581B2 (en) * | 2012-07-06 | 2016-05-10 | Lincoln Global, Inc. | Apparatus and method for energy replacement in a welding waveform during welding |
-
2005
- 2005-01-24 JP JP2005014934A patent/JP2006198668A/en active Pending
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2006
- 2006-01-11 CN CNB2006100036935A patent/CN100509239C/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| JP2006198668A (en) | 2006-08-03 |
| CN1810430A (en) | 2006-08-02 |
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Granted publication date: 20090708 |