CN100460126C - Arc welding apparatus - Google Patents
Arc welding apparatus Download PDFInfo
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- CN100460126C CN100460126C CNB2004100120442A CN200410012044A CN100460126C CN 100460126 C CN100460126 C CN 100460126C CN B2004100120442 A CNB2004100120442 A CN B2004100120442A CN 200410012044 A CN200410012044 A CN 200410012044A CN 100460126 C CN100460126 C CN 100460126C
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Abstract
The arc welding equipment to perform the gas shield arc welding comprises a robot control device to output the operational control signal based on the welding speed set signal and the operational locus data of a welding torch, a manipulator to move the welding torch with the operational control signal as an input, a welding power source, and a gas flow rate adjuster to adjust the flow rate of shield gas ejected from the welding torch, and further comprises a gas flow rate setting circuit to output the gas flow rate set signal by the function to determine the relationship between the welding speed set signal and the shield gas flow rate with the welding speed set signal as the input. The gas flow rate adjuster automatically adjusts the shield gas flow rate with the gas flow rate set signal as the input. To provide an arc welding equipment for forming shield gas atmosphere capable of realizing stable arc and obtaining a sound weld part without defect even when the welding speed or the welding posture is changed during the gas shield arc welding.
Description
Technical field
The present invention relates to a kind ofly in carrying out the arc-welding apparatus that gas shielded arc welding connects, be included as the arc-welding apparatus of the gas flow adjuster of setting shield gas flow rate and improveing.
Background technology
In gas shielded arc welding connects, need shield atmosphere by in electric arc and fusion pool, spraying protective gas such as carbonic acid gas gas, argon gas, prevent in the atmosphere intrusion welding surroundings.If this protective gas can not cover electric arc and fusion pool effectively, atmosphere will be invaded in the welding surroundings.Consequently, electric arc generation state can not keep stablizing, producing pore or multiple weld defects such as generation is splashed in a large number, the deterioration of overlap outward appearance.
The schematic diagram of electric arc generating unit when Fig. 9 represents to carry out TIG (Tungsten Inert Gas) welding, the situation of Fig. 9 (A) expression low speed welding, the situation of Fig. 9 (B) expression high-speed welding.
In Fig. 9 (A), between tungsten electrode 1 and soldered thing 2 by figure in the unillustrated source of welding current electric power is provided, produce electric arc 3.And, by the protective gas 6 of nozzle 4 ejections with electric arc 3 and fusion pool 5 and atmospheric isolation.
The situation of Fig. 9 (A) expression low speed welding, the protective gas environment forms the protection zone roughly symmetrical with respect to the tungsten electrode axle.
On the other hand, in the situation of Fig. 9 (B) expression high-speed welding, the protection zone is moved to a lateral deviation opposite with welding direction, and the sealing in weld part the place ahead is degenerated.Consequently, produce pore, can not obtain gratifying welding effect in the welding position.
Used the motion of protective gas when in the past, the improvement high-speed welding being arranged once with electric arc and fusion pool and isolated from atmosphere method.For example, with reference to Figure 10 disclosed high-speed gas container type gas protection arc welding method in the patent documentation 1 is described.
Figure 10 represents the schematic diagram that the high-speed gas container type gas protection arc welding method to prior art describes.In the figure, feeder rod used therein 12 has been installed on the soldering set 7, has been powered to welding rod 13 by feeder rod used therein 12.Between feeder rod used therein 12 and soldered thing 2, provide electric power by the unillustrated source of welding current among the figure, produce electric arc 3.In addition, ejection the nozzle 4 of protective gas 6 on being installed in soldering set 7.Then, be provided with high-speed gas nozzle 8 on soldering set 7, compressed air 10 ejects from the narrow gas ejection ports 9 of this high-speed gas nozzle 8, forms the gas curtain 11 of thin layer, will open with isolated from atmosphere around the weld part in the welding.Consequently, even when high-speed welding, also can protect electric arc 3 and weld part on every side thereof not invaded by atmosphere.
But, in this prior art, have following problem.
In above-mentioned prior art,, also constant and very big from the quantity of the compressed air 10 of high-speed gas nozzle 8 ejection even speed of welding changes.Usually, because this compressed air 10 uses the gas identical with protective gas 6, increased the consuming cost of protective gas.
In addition, in this prior art, because directly the shield gas flow rate of protection electric arc 3 is constant, as in full posture weld job, when becoming up in the welding or during vertical posture, directly protecting the concentration of the protective gas environment of electric arc 3 to reduce.Consequently, it is unstable that electric arc 3 becomes, and the sealing of weld part is insufficient, produces defectives such as pore thus.
Patent documentation: the spy opens communique 2002-No. 219572.
Summary of the invention
Even the object of the present invention is to provide a kind of in gas shielded arc welding connects speed of welding or welding posture change, still can form keep arc stability, obtain zero defect, the arc-welding apparatus of the protective gas environment of sound weld part.
For achieving the above object, one of the present invention provides a kind of arc-welding apparatus, comprising: robot controller, and it is according to instructing the speed of welding setting signal of device and the movement locus data of soldering set, output action control signal from suspension type; Manipulator, it as input, allows soldering set move with above-mentioned action control signal; The source of welding current, it provides electric power between above-mentioned soldering set and soldered thing; Gas flow adjuster, it is adjusted from the shield gas flow rate of above-mentioned soldering set ejection; Carrying out gas shielded arc welding connects; it is characterized in that; welding pose discrimination circuit is set in described robot controller; its with the movement locus data of described soldering set as input; judge the welding posture; output welding pose discrimination signal; described arc-welding apparatus also possesses gas flow circuit is set; be as input with described speed of welding setting signal and described welding pose discrimination signal; according to the function of determining to concern between described speed of welding setting signal and described welding pose discrimination signal and the described shield gas flow rate; output gas flow of gas setting signal, above-mentioned gas flow regulator are as input with above-mentioned gas flow setting signal; automatically adjust the gas flow automatic regulator of shield gas flow rate.
Arc-welding apparatus of the present invention even speed of welding changes with the welding posture in gas shielded arc welding connects, also can form arc stability, and can access the protective gas environment of flawless, sound weld part.
Description of drawings
Fig. 1 represents the structure chart of arc-welding apparatus of the present invention.
Fig. 2 is illustrated in the TIG welding, and the schematic diagram that concerns between the speed of welding of weld defects such as pore and the shield gas flow rate does not take place at weld part.
Fig. 3 is illustrated in the MIG welding of aluminium, and the schematic diagram that concerns between the speed of welding of weld defects such as pore and the shield gas flow rate does not take place at weld part.
Welding posture schematic diagram when Fig. 4 represents that horizontal fixed pipeline 22 carried out the welding of full posture.
Fig. 5 is illustrated in the TIG welding, and the schematic diagram that concerns between the welding posture of weld defects such as pore and the shield gas flow rate does not take place at weld part.
Fig. 6 is illustrated in the MIG welding, and the schematic diagram that concerns between the welding posture of weld defects such as pore and the shield gas flow rate does not take place at weld part.
Fig. 7 is illustrated in present technology and the arc-welding apparatus of the present invention, utilizes TIG welding not have the overlap welding of welding additive, the schematic diagram of weld flash 23 outward appearances when switching the speed of welding setting signal Vw from robot controller 16 in the welding.
Fig. 8 is illustrated in present technology and the arc-welding apparatus of the present invention; utilize the TIG welding not have the overlap welding of welding additive; switch speed of welding setting signal Vw in the welding from robot controller 16; in present technology; for guaranteeing not produce weld defect, under the situation that the shield gas flow rate that shield gas flow rate is constant when remaining on high-speed welding is 20 liters/minute with the comparison schematic diagram of protective gas consumption of the present invention.
The ideograph of the electric arc generating unit when Fig. 9 represents to carry out the TIG welding.
Figure 10 represents the schematic diagram that the high-speed gas container type gas protection arc welding method to prior art describes.
Among the figure: 1-tungsten electrode, 2-soldered thing, 3-electric arc; 4-nozzle, 5-fusion pool, 6-protective gas; 7-soldering set, 8-high-speed gas injection nozzle, 9-gas vent; 10-compressed air, 11-high speed gas curtain, 12-feeder rod used therein; 13-welding rod, 14-manipulator, 15-suspension type instruction device; 16-robot controller, 17-welding pose discrimination circuit, 18-gas flow initialization circuit; 19-gas flow automatic regulator, 20-gas cylinder, 21-source of welding current; 22-horizontal fixed pipeline, 23-overlap, 24-sand holes; Dw-movement locus data, Gw-gas flow setting signal, Iw-welding current; Mc-action control signal, P1-welding position, P2-welding position; P3-welding position, P4-welding position, Pc-source of welding current output control signal; Pw-welding pose discrimination signal; S-critical line, t1-constantly, t2-constantly; t3-constantly, Vw-speed of welding setting signal.
The specific embodiment
Followingly embodiments of the present invention are described with reference to accompanying drawing.
Fig. 1 represents the structure chart of arc-welding apparatus of the present invention.Soldering set 7 has been installed on manipulator 14.Welding rod 13 is fed by above-mentioned soldering set 7, and and soldered thing 2 between produce electric arc 3.
Be imported into robot controller 16 from the speed of welding setting signal Vw of suspension type instruction device (Teach Pendant) 15 and the movement locus data Dw of soldering set 7.This robot controller 16 is based on the speed of welding setting signal Vw of input and the movement locus data Dw output action control signal Mc of soldering set 7.Manipulator 14, with above-mentioned action control signal Mc as input, mobile soldering set 7.
In addition, in this robot controller 16, welding pose discrimination circuit 17 is set, it as input, judges the welding posture with the movement locus data Dw of above-mentioned soldering set 7, and output welding pose discrimination signal Pw.
In addition, above-mentioned robot controller 16, the beginning of controlling arc welding simultaneously with stop constantly, and the output control source of welding current 21 required source of welding current of exerting oneself goes out force control signal Pc.The source of welding current 21 goes out force control signal Pc by importing this source of welding current, provides pilot arc welding required welding current Iw and weldingvoltage, controls feeding of above-mentioned welding rod 13 simultaneously, and the beginning of control arc welding with stop.
In gas flow initialization circuit 18, the function that concerns between definite above-mentioned speed of welding setting signal Vw and above-mentioned welding pose discrimination signal Pw and the shield gas flow rate is set.This function is determined the curve of following speed of welding and welding posture and shield gas flow rate.
Then, this gas flow initialization circuit 18, as input, the gas flow setting signal Gw with the corresponding shield gas flow rate of these signals is set in output with above-mentioned speed of welding setting signal Vw and above-mentioned welding pose discrimination signal Pw.
Gas flow automatic regulator 19, is adjusted the shield gas flow rate of being supplied with by gas cylinder 20 automatically, and is offered soldering set 7 as input with this gas flow setting signal Gw.
Below, the action of arc-welding apparatus of the present invention is described.
Instruct device 15 behind robot controller 16 output welding sign on signals from suspension type, output action control signal Mc, it is based on the speed of welding setting signal Vw that imports in advance from suspension type instruction device 15 and the movement locus data Dw of soldering set 7.Manipulator 14 as input, moves to welding starting position with soldering set 7 with this action control signal Mc.
Soldering set 7 is in case arrive the welding starting position; gas flow initialization circuit 18; as input, set the gas flow setting signal Gw of the shield gas flow rate corresponding with speed of welding setting signal Vw and welding pose discrimination signal Pw to 19 outputs of gas flow automatic regulator with these signals.
Gas flow automatic regulator 19, Gw adjusts shield gas flow rate automatically according to the gas flow setting signal, and from soldering set 7 ejections.In addition, the source of welding current 21 goes out force control signal Pc as input with the source of welding current from robot controller 16, output welding current Iw and weldingvoltage, and offer welding rod 13, the beginning arc welding.In welding, soldering set 7 moves according to above-mentioned action control signal Mc.When soldering set 7 arrives the ultimate position, finish arc welding.
With reference to Fig. 2 and Fig. 3, the function curve example that concerns between speed of welding setting signal Vw that circuit 18 sets and the shield gas flow rate is set describes by the above-mentioned gas flow that is arranged at determining.Fig. 2 is illustrated in the TIG welding, and the schematic diagram that concerns between the speed of welding of weld defects such as pore and the shield gas flow rate does not take place at weld part.Welding condition is: protective gas is an argon gas, and the SUS304 stainless steel that soldered thing thickness is 3mm, welding current are 60A～250A.
In the figure, the scope more than critical line S, because the shield gas flow rate that ejection and speed of welding are complementary, so can obtain good overlap.And the scope below critical line S, because with respect to speed of welding, protective gas discharging jet quantity not sufficient then produces weld defects such as sand holes and pore.
Fig. 3 is illustrated in the MIG welding of aluminium, and the schematic diagram that concerns between the speed of welding of weld defects such as pore and the shield gas flow rate does not take place weld part.Welding condition is: protective gas is an argon gas, and A5052 aluminium-magnesium alloy that soldered thing thickness is 3mm, welding current are 60A～250A.
In the figure, the scope more than critical line S, because the shield gas flow rate that ejection and speed of welding are complementary, so can obtain good overlap.And the scope below critical line S, because with respect to speed of welding, protective gas discharging jet quantity not sufficient then produces weld defects such as sand holes and pore.
Below, with reference to Fig. 4～Fig. 6, the curve example of determining to be arranged at relation function between speed of welding setting signal Vw in the above-mentioned gas flow set circuit 18 and welding pose discrimination signal Pw and the shield gas flow rate is described.
Welding posture schematic diagram when Fig. 4 represents that horizontal fixed pipeline 22 carried out the welding of full posture.Welding position P1 is the posture of welding downwards, and welding position P2 and P4 are the posture of transverse weld, the posture of welding position P3 for upwards welding.
Fig. 5 is illustrated in the TIG welding, at weld part the welding posture of weld defects such as pore and the graph of a relation between the shield gas flow rate does not take place.Welding condition is: protective gas is an argon gas, and soldered thing is the SUS304 stainless steel of thickness 3mm, and welding current is 100A, and speed of welding is the 15cm/ branch.
In the figure, the scope more than critical line S, because the shield gas flow rate that ejection and welding posture are complementary, so can obtain good overlap.And the scope below critical line S, because with respect to the welding posture, protective gas discharging jet quantity not sufficient then produces weld defects such as sand holes and pore.Particularly, in the situation of posture that makes progress,, therefore need for example be equivalent to the shield gas flow rate of about 2 times of downward postures because directly the protective gas ambient concentration of protection electric arc reduces.
Fig. 6 is illustrated in the MIG welding, at weld part the welding posture of weld defects such as pore and the graph of a relation between the shield gas flow rate does not take place.Welding condition is: protective gas is the carbonic acid gas of argon gas+20% volume of 80% volume, and soldered thing is the low carbon steel pipe of thickness 6mm, and welding current is 140A～220A, and speed of welding is the 40cm/ branch.
In the figure, the scope more than critical line S, because the shield gas flow rate that ejection and welding posture are complementary, so can obtain good overlap.And the scope below critical line S, because with respect to the welding posture, protective gas discharging jet quantity not sufficient then produces weld defects such as sand holes and pore.Particularly, in the situation of posture that makes progress,, therefore need for example be equivalent to the shield gas flow rate of about 2 times of downward postures because directly the protective gas ambient concentration of protection electric arc reduces.
Fig. 7 is illustrated in prior art and the arc-welding apparatus of the present invention, does not have the overlap welding of welding additive in TIG welding, the schematic diagram of weld flash 23 outward appearances when the speed of welding setting signal Vw that switches in the welding from robot controller 16.
The schematic diagram of overlap 23 outward appearances when this figure (A) expression uses the arc-welding apparatus of prior art to carry out the TIG welding; the schematic diagram of overlap 23 outward appearances when this figure (B) expression uses arc-welding apparatus of the present invention to carry out the TIG welding, this figure (C) are illustrated in the schematic diagram that concerns between the speed of welding and shield gas flow rate in prior art and the arc-welding apparatus of the present invention.
Welding condition is: protective gas is an argon gas, and A5052 aluminium-magnesium alloy that soldered thing thickness is 3mm is when speed of welding is that 10cm/ timesharing welding current is 80A, when speed of welding is that 50cm/ timesharing welding current is 150A.In addition,, be 10 liters/minute in the prior art about shield gas flow rate, and invariable; And in the present invention, between moment t1 and moment t2, speed of welding is the 10cm/ branch, and shield gas flow rate is 10 liters/minute.But between moment t2 and moment t3, speed of welding is the 50cm/ branch, and shield gas flow rate is 20 liters/minute.Weld length is 300mm.
In the prior art shown in this figure (A), at moment t2, bring up to the 50cm/ branch although speed of welding is divided by 10cm/, shield gas flow rate still keep 10 liters/minute invariable.Consequently, be that the moment t2 that 50cm/ divides arrives constantly between the t3, because with respect to speed of welding, therefore pore 24 weld defects such as grade take place protective gas discharging jet quantity not sufficient in speed of welding.
In contrast, in the present invention,, bring up to the 50cm/ timesharing by the 10cm/ branch, according to speed of welding shield gas flow rate is brought up to 20 liters/minute from 10 liters/minute by gas flow initialization circuit 18 shown in Figure 1 when speed of welding at moment t2.Consequently, because weld part can access protection effectively, can not produce weld defect.
Fig. 8 and Fig. 7 are same; be illustrated in present technology and the arc-welding apparatus of the present invention; in the TIG welding, there is not the overlap welding of welding additive; the schematic diagram of welding result when the speed of welding setting signal Vw that switches in the welding from robot controller 16; in the prior art; for guaranteeing not produce weld defect; allow shield gas flow rate is constant to remain on 20 liters/minute, the protective gas consumption during shield gas flow rate when being in high-speed welding and the comparison schematic diagram of protective gas consumption of the present invention.
Fig. 8 (A) is illustrated in the schematic diagram that concerns between the speed of welding and shield gas flow rate in prior art and the arc-welding apparatus of the present invention; Fig. 8 (B) expression in the prior art, when allowing shield gas flow rate when the protective gas consumption is constant to remain on high-speed welding with the comparison diagram of the protective gas amount of expending in the present invention.
In the figure, though weld defect does not all take place in prior art and the present invention,, the present invention has the effect of the remarkable saving protective gas amount of expending compared with prior art.
Claims (1)
1. arc-welding apparatus comprises: robot controller, and it is according to from the speed of welding setting signal of suspension type instruction device and the movement locus data of soldering set, output action control signal; Manipulator, it as input, allows soldering set move with described action control signal; The source of welding current, it provides electric power between described soldering set and soldered thing; And gas flow adjuster, it is adjusted from the shield gas flow rate of described soldering set ejection; Carry out gas shielded arc welding and connect, it is characterized in that,
Welding pose discrimination circuit is set in described robot controller, and it as input, judges the welding posture with the movement locus data of described soldering set, output welding pose discrimination signal,
Described arc-welding apparatus also possesses gas flow circuit is set; be as input with described speed of welding setting signal and described welding pose discrimination signal; according to the function of determining to concern between described speed of welding setting signal and described welding pose discrimination signal and the described shield gas flow rate; the output gas flow of gas setting signal
Described gas flow adjuster is as the gas flow automatic regulator of importing, adjust automatically shield gas flow rate with described gas flow setting signal.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2003339771 | 2003-09-30 | ||
| JP2003339771A JP2005103592A (en) | 2003-09-30 | 2003-09-30 | Arc welding equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1603048A CN1603048A (en) | 2005-04-06 |
| CN100460126C true CN100460126C (en) | 2009-02-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100120442A Expired - Fee Related CN100460126C (en) | 2003-09-30 | 2004-09-28 | Arc welding apparatus |
Country Status (2)
| Country | Link |
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| JP (1) | JP2005103592A (en) |
| CN (1) | CN100460126C (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5302061B2 (en) * | 2009-03-19 | 2013-10-02 | 株式会社ダイヘン | Arc welding equipment |
| JP5558871B2 (en) * | 2010-03-15 | 2014-07-23 | 株式会社ダイヘン | Arc welding equipment |
| JP4745453B1 (en) * | 2010-09-30 | 2011-08-10 | 株式会社ダイヘン | Arc welding equipment |
| JP5263462B1 (en) * | 2011-10-05 | 2013-08-14 | パナソニック株式会社 | Welding equipment |
| CN102744500B (en) * | 2012-07-17 | 2015-03-25 | 奇瑞汽车股份有限公司 | Gas shielded welding device |
| CN109465521A (en) * | 2017-09-08 | 2019-03-15 | 南京钧乔行汽车灯具有限公司 | A kind of semi-automatic focusing argon arc welding machine |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS571350B2 (en) * | 1973-09-11 | 1982-01-11 | ||
| JPH05261547A (en) * | 1992-03-17 | 1993-10-12 | Matsushita Electric Ind Co Ltd | Consumable electrode arc welding machine |
| US5304776A (en) * | 1993-03-24 | 1994-04-19 | Steven R. Buerkel | System for welding pipes |
| JP2001259838A (en) * | 2000-03-23 | 2001-09-25 | Daihen Corp | Ac pulse mig/mag welding method and power supply device |
| JP2004148369A (en) * | 2002-10-31 | 2004-05-27 | Hitachi Constr Mach Co Ltd | Welding equipment and method for setting welding condition |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5291748A (en) * | 1976-01-29 | 1977-08-02 | Nippon Kokan Koji Kk | Method of inert gas shielded arc circumferencial welding of pipes |
-
2003
- 2003-09-30 JP JP2003339771A patent/JP2005103592A/en active Pending
-
2004
- 2004-09-28 CN CNB2004100120442A patent/CN100460126C/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS571350B2 (en) * | 1973-09-11 | 1982-01-11 | ||
| JPH05261547A (en) * | 1992-03-17 | 1993-10-12 | Matsushita Electric Ind Co Ltd | Consumable electrode arc welding machine |
| US5304776A (en) * | 1993-03-24 | 1994-04-19 | Steven R. Buerkel | System for welding pipes |
| JP2001259838A (en) * | 2000-03-23 | 2001-09-25 | Daihen Corp | Ac pulse mig/mag welding method and power supply device |
| JP2004148369A (en) * | 2002-10-31 | 2004-05-27 | Hitachi Constr Mach Co Ltd | Welding equipment and method for setting welding condition |
Non-Patent Citations (1)
| Title |
|---|
| 特開2004-148369A 2004.05.27 |
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| Publication number | Publication date |
|---|---|
| CN1603048A (en) | 2005-04-06 |
| JP2005103592A (en) | 2005-04-21 |
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