CN102233476A - Consumption electrode type arc welding method - Google Patents
Consumption electrode type arc welding method Download PDFInfo
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- CN102233476A CN102233476A CN201110093654XA CN201110093654A CN102233476A CN 102233476 A CN102233476 A CN 102233476A CN 201110093654X A CN201110093654X A CN 201110093654XA CN 201110093654 A CN201110093654 A CN 201110093654A CN 102233476 A CN102233476 A CN 102233476A
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Abstract
Provided is a multi-layer and multi-channel welding method of a consumption electrode type arc welding method using carbon dioxide. Arc welding is conducted on a first bead or a multi-layer bead by means of constant voltage. In this way, the electric arc expands, and the permissibility of deviation on aiming position of welding wires is high and good melting is obtained. In this case, although splash quantity increases, welding operation will not be influenced due to that the welding lies in the first layer or a deep position near the first layer. Arc welding is conducted on the bead of a final layer by means of pulse current, and therefore, splash quantity can be reduced and the performance of welding operation can be improved.
Description
Technical field
The present invention relates to a kind of that carbon dioxide is (many as the multilayer multiple tracks of the consumable electrode type arc welding of protective gas use
Contain) welding method, particularly relate to a kind of only make the 1st layer or comprise the welding bead (welding path) of the 1st layer multilayer welding method, with the different consumable electrode type arc-welding method of welding method of thereafter one or more layers welding bead.
Background technology
With carbon dioxide as protective gas, undertaken normally welding the welding bead of all layers under the situation that multi-pass welding connects by the consumable electrode type arc-welding method with same welding method.Welding method in this case is the welding that has utilized constant-voltage characteristic.Therewith the contrast, as the welding method of having used carbon-dioxide protecting gas, splash in order to reduce, in TOHKEMY 2009-233728 number motion a kind of pulse arc welding method.
Yet, in multilayer welding method based on the automatic welding of the consumable electrode type arc welding of using carbon dioxide, if use the pulse welding, splash though then can reduce, but such problem is arranged: concentrate in order to make electric arc, the expansion of fusing can diminish, and can diminish for the permission of the aim bias of sealing wire etc.
Summary of the invention
The present invention puts in view of the above problems just and proposes, its purpose is, a kind of consumable electrode type arc-welding method is provided, multi-pass welding at the consumable electrode type arc-welding method that uses carbon dioxide connects in the method, about the 1st layer welding,, and melted fully for the permission height of aim bias, and, the generation that can suppress to splash.
In CO 2 gas-shielded consumable electrode type arc-welding method of the present invention; under the welding condition of constant voltage; to the 1st layer or carry out arc welding from the 1st layer of one or more welding bead till playing N (N for greater than 1 integer) layer; and under the welding condition of having used pulse current, thereafter the one deck or the welding bead of multilayer are carried out arc welding.
In this case, preferably will be arranged to play till the 4th layer based on the arc welding of the welding condition of described constant voltage from the 1st layer.
In the present invention owing to utilized the characteristic of constant voltage to come or carried out arc welding from the 1st layer of welding bead that plays the N layer to the 1st layer, so electric arc expand, for the permission height of the deviation of the homing position of sealing wire, and, the fusing that can access.In this case, though the generation that splashes is many owing to be to produce by welding the 1st layer dark position, thus the fusion again of the major part of splashing welding bead afterwards, thereby not to the weld seam after finishing (welding bead) with and near impact.On the other hand, owing to thereafter welding bead is carried out arc welding with pulse current, thus reduce the generation that splashes, thus the raising welding operation, and, can reduce near the splashing amount the weld seam after finishing attached to welding.
Description of drawings
Fig. 1 is the groove section figure of the consumable electrode type arc-welding method of expression embodiments of the present invention.
Fig. 2 is the figure of the form of expression electric arc.
Fig. 3 be illustrated in the 1st layer or the 1st layer with and subsequent multilayer in the figure of current type of arc welding of welding bead.
Fig. 4 is the figure of current type that is illustrated in the arc welding of the welding bead in after the constant voltage welding one or more layers.
Fig. 5 is the ideograph of the example of the laminating method that connects of expression multi-pass welding.
The specific embodiment
Below, about embodiments of the present invention, specify with reference to accompanying drawing.As shown in Figure 1, in multi-pass welding connects, such as at riser 1 and have and form レ type groove between the plate 2 of groove, at groove bottom configuration back lining materials 3, along the sealing wire that forms by this groove (direction vertical) welding torch is moved, and carry out arc welding by the consumable electrode type arc-welding method with paper.At this moment, after the welding of the 1st welding bead (the 1st layer) 10 finishes, carry out the welding of the 2nd welding bead 11 (the 2nd layer), after, similarly carry out the welding of the 3rd welding bead 12 (the 2nd layer).In the present embodiment, under the welding condition of constant-voltage characteristic, carry out the arc welding of the 1st layer (the 1st welding bead), and carry out the 2nd layer of (the 2nd welding bead, the 3rd welding bead) later arc welding with pulse current.
Like this, the welding of the 1st layer (the 1st welding bead) of the stability that requires to melt or the 1st layer (the 1st welding bead) with and subsequent the multilayer welding bead in, carry out the constant voltage welding of no pulse, and reduce the intermediate layer and the complete layer (げ on the bodyguard of the generation of splashing in hope
), use the pulse welding.
Fig. 2 (a) is the figure that is illustrated in to the form of the electric arc under the situation of constant voltage, is formed on molten drop 21 expansions of the front end of welding wire 4, in addition, expands towards the electric arc 20 of groove from the front end of this molten drop 21.On the other hand, shown in Fig. 2 (b), carrying out with pulse current under the situation of arc welding, the molten drop 23 that is formed on the front end of welding wire 4 is not expanded, and concentrates towards the electric arc 22 of groove from this molten drop 23.
The pulse welding is because the joule heating effect of extension is big, so under identical average current, compare the no pulse welding, the welding wire fusion speed of pulse welding is higher.That is, make under the identical situation of welding wire fusion speed, the average current during the pulse welding has step-down, and depth of fusion has the trend that shoals.
In addition, the constant voltage of the carbon dioxide of prior art welding is compared with the MAG welding, the welding alligatoring, and owing to arc force makes molten drop vibration deformation brokenly.In especially spherical (globule) transient mode of the consumable electrode type arc welding of using carbon dioxide,,, the electric arc of microcosmic also can change so producing the position owing to play soldered member generation electric arc from the molten drop of irregular fluctuation.On the contrary, on macroscopic view, electric arc has expansion, and the expansion of fusing also becomes greatly, thereby for big than the MAG welding of the permissible range of the aim bias of the sealing wire of electric arc etc.
In contrast, in pulse welding, owing to make particle transfer regularly,, consequently, compare the situation of constant voltage welding, owing to the expansion of electric arc also narrows down, so fusion range also narrows down so that the electric arc of microcosmic produces the position is also stable.
As mentioned above, the difference of the fusion range that causes according to the expansion because of electric current and electric arc under the situation for the pulse welding, is compared the no pulse welding, and in order to ensure the stability of overall fusing, it is strict that the management of homing position becomes.Promptly the permission for error diminishes.
The present invention combines the characteristic of such constant voltage welding with the characteristic of pulse welding, thereby assembly precision with soldered member and tack weld destabilizing factors such as (tack welding bead) the 1st layer welding or the 1st layer of welding with and subsequent the multilayer welding bead in, the constant voltage welding has priority from the viewpoint of meltdown property, and in its later welding bead, owing to be the welding after the sensing unit by arc sensor etc. detects actual sealing wire position, and, carry out the pulse welding for dispersing of suppressing to splash.
Like this, in the present embodiment, utilize constant-voltage characteristic to weld the welding of the 1st layer or the welding bead in the 1st layer of multilayer.Fig. 3 represents the welding current type of the 1st layer or the welding bead in the 1st layer of multilayer.At first, after electric arc starting such as 0.1～1.0 second during, carry out arc welding (first operation) with the short circuiting transfer of constant voltage., welding current brought up to the current range of spherical transient mode, carry out arc welding (second operation) with constant voltage thereafter.
That is, in the arc welding of the 1st layer or welding bead in the 1st layer of multilayer, at first, in first operation, come starting arc according to the contact of welding wire.This first operation is a constant voltage, and the magnitude of current is relatively low, forms electric arc with short circuiting transfer.For example, the welding current in this first operation is 100～200A, and arc voltage is 15～27V, is 0.1～1.0 second very short time from the elapsed time of electric arc starting.
Secondly, through after this first operation, the setting value of welding current is set at the steady state value in the current range of the spherical transient mode suitable, and enters second operation of carrying out arc welding with constant voltage with this welding.For example, the welding current in this second operation is the high electric current of 240～350A, and arc voltage is 29～38V.If under this condition, carry out the constant voltage arc welding, then under the arc shape of spherical transition, form electric arc, obtain high deposition rate (deposition rate).In this second operation, the electric arc expansion obtains stable electric arc, and is melted fully, thereby forms stable fusion pool.In this second operation, till solder terminal portion, weld.
Next, in one deck or the arc welding till the superiors of multilayer thereafter, as shown in Figure 4, after the first above-mentioned operation, in the 3rd operation, carry out arc welding by pulse current.Be the welding bead after the welding of constant voltage, carry out the pulsed arc welding with the average welding current value of this welding.The arc shape of this moment is spherical transition.In the 3rd operation, the average welding current of pulse current is 220～340A, and arc voltage is 32～39V.This welding condition is the condition of common this welding, is carrying out the pulse welding under this condition till the end of sealing wire.In pulsed arc welding, by the constant voltage arc welding, can also accelerate welding wire feeding speed, make and melt the metallized speed of applying of melting and rise, thereby welding is carried out fast.
In this manner, in the later half welding bead that comprises final layer, carry out the pulse welding basically.Like this, in first operation, be short circuiting transfer, begin common electric arc starting, but thereafter, in the 3rd operation, enter this welding of spherical transition, carry out the pulse welding.
Usually, in the consumable electrode type arc welding, carry out the arc crater (crater) of solder terminal portion and handle.In this is handled, for example, electric current is reduced to 100～200A, voltage is reduced to 15～27V, and switch to short circuiting transfer.In addition, arc voltage is a steady state value.
As mentioned above; in the multi-pass welding connection based on the automatic welding of CO 2 gas-shielded consumable electrode type arc welding of present embodiment; by on the welding bead of the 1st layer of the stability that requires to melt or thereafter multilayer, carrying out the no pulse welding; and reduce the intermediate layer and the enterprising horizontal pulse welding of complete layer of the generation of splashing in hope, thereby can access high welding quality.
Fig. 5 is the ideograph of the laminating method that connects of expression multi-pass welding.It has represented to be under 3 layers the situation, fetches initial the 1st layer of welding with the constant voltage arc welding, and fetches the example of the welding bead of the 2nd layer of welding and the 3rd layer with pulse arc welding.Be under 5 layers the situation, carrying out the constant voltage arc welding till playing the 3rd layer from initial the 1st layer, and carrying out the pulsed arc welding till playing the 5th layer from ensuing the 4th layer.Be under 7 layers the situation, carrying out the constant voltage arc welding till playing the 4th layer from the 1st layer, and carrying out the pulsed arc welding till playing the 7th layer from the 5th layer.Being under 8 layers the situation, also is to carry out the constant voltage arc welding from the 1st layer till playing the 4th layer, and from after the 5th layer carry out the pulsed arc welding till playing the 8th layer.After, similarly,, also be to carry out the constant voltage arc welding till playing the 4th layer, and afterwards the 5th layer carry out the pulsed arc welding later on from the 1st layer even the number of plies increases.
This is to be, as previously mentioned, the 1st layer or be main purpose till playing multilayer (the 4th layer) in the status of having the advantage of constant voltage arc welding aspect the abundant intensity of depth of fusion from the 1st layer, in addition, the stability that can guarantee the electric arc profiling (ア one Network Imitation い) used in robot welding also is big purpose.
In fact, in soldering, except the 1st layer of welding, at the 2nd layer of residual example of influence (becoming convex weld etc.) that also has assembly precision butt welded seam shape to cause.In addition, when switch to corner (corner) portion from line part, when corner portion switches to line part, the length of fusion pool and moving changes.In contrast, in the welding of the pulse mode that moves of controlling conditions at the arc and molten drop by pulse current, the mobile unsettled situation of electric arc that makes of fusion pool is arranged.Promptly, in place as described above, the influence that is subjected to the mother metal shape and keeps the locator (positioner) etc. of mother metal, the state of fusion pool changes easily, is being subjected under this state that influences, and it is unstable that electric arc becomes, so the electric current of the arc sensor that is provided with in order to follow the trail of sealing wire produces disorderly, consequently, cause the sealing wire profiling also unstable, thereby hinder normal welding.
Therefore, under constant voltage mode to the 1st layer or carry out arc welding till playing the highest the 4th layer from the 1st layer.Rely on workpiece shape etc. though be suitable for the number of plies of constant voltage arc welding, but if based on described for depth of fusion abundant intensity and the problem of the stability of electric arc profiling, when the plate thickening, the major part of the facies posterior hepatis that splashes that then produces under constant voltage mode can be buried (fusing again) by later welding bead, even so the 1st layer etc. welding bead is the constant voltage arc welding, also can keeps and alleviate the effect of splashing.
[utilizability on the industry]
In the present invention, can realize the arc welding of the 1st layer or the welding bead in the 1st layer of multilayer stabilisation, with and subsequent layer in the minimizing of splashing of welding bead, thereby very effective to the raising of the welding operation in the multilayer welding.
Claims (2)
1. CO 2 gas-shielded consumable electrode type multilayer arc-welding method, wherein,
Under the welding condition of constant voltage, to the 1st layer or carry out arc welding from the 1st layer of one or more welding bead till playing the N layer, at this, N is the integer greater than 1,
And under the welding condition of having used pulse current, the one deck afterwards or the welding bead of multilayer are carried out arc welding.
2. consumable electrode type multilayer arc-welding method according to claim 1, wherein,
Arc welding based on the welding condition of described constant voltage is to play till the 4th layer from the 1st layer.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2010096815A JP2011224617A (en) | 2010-04-20 | 2010-04-20 | Consumable electrode type arc welding method |
| JP2010-096815 | 2010-04-20 |
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|---|---|
| CN102233476A true CN102233476A (en) | 2011-11-09 |
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| CN201110093654XA Pending CN102233476A (en) | 2010-04-20 | 2011-04-11 | Consumption electrode type arc welding method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107570837A (en) * | 2016-07-04 | 2018-01-12 | 株式会社神户制钢所 | Welding condition creation method in welding down |
| CN111819021A (en) * | 2018-03-30 | 2020-10-23 | 株式会社神户制钢所 | Welding device and welding method using same |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105436673A (en) * | 2015-12-18 | 2016-03-30 | 南京航空航天大学 | Automatic welding process for Invar die steel |
Citations (3)
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| CN1281078A (en) * | 1999-07-16 | 2001-01-24 | 林肯环球公司 | Method and system of welding steel guide rails |
| JP2001162370A (en) * | 1999-12-06 | 2001-06-19 | Hitachi Constr Mach Co Ltd | Method and device for welding narrow groove |
| JP2005095915A (en) * | 2003-09-24 | 2005-04-14 | Hitachi Ltd | Circumferential multi-layer welding method and automatic welding apparatus |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4002960B2 (en) * | 2000-02-29 | 2007-11-07 | 独立行政法人物質・材料研究機構 | Consumable electrode gas shield arc welding method and apparatus |
| JP5061019B2 (en) * | 2008-04-09 | 2012-10-31 | 株式会社神戸製鋼所 | Arc welding method |
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2010
- 2010-04-20 JP JP2010096815A patent/JP2011224617A/en active Pending
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- 2011-04-11 CN CN201110093654XA patent/CN102233476A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1281078A (en) * | 1999-07-16 | 2001-01-24 | 林肯环球公司 | Method and system of welding steel guide rails |
| JP2001162370A (en) * | 1999-12-06 | 2001-06-19 | Hitachi Constr Mach Co Ltd | Method and device for welding narrow groove |
| JP2005095915A (en) * | 2003-09-24 | 2005-04-14 | Hitachi Ltd | Circumferential multi-layer welding method and automatic welding apparatus |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107570837A (en) * | 2016-07-04 | 2018-01-12 | 株式会社神户制钢所 | Welding condition creation method in welding down |
| CN107570837B (en) * | 2016-07-04 | 2020-12-01 | 株式会社神户制钢所 | Welding condition creation method in face-down welding |
| CN111819021A (en) * | 2018-03-30 | 2020-10-23 | 株式会社神户制钢所 | Welding device and welding method using same |
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| JP2011224617A (en) | 2011-11-10 |
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