CN102528234A - Butt welding method and butt welding device - Google Patents
Butt welding method and butt welding device Download PDFInfo
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- CN102528234A CN102528234A CN2011104427229A CN201110442722A CN102528234A CN 102528234 A CN102528234 A CN 102528234A CN 2011104427229 A CN2011104427229 A CN 2011104427229A CN 201110442722 A CN201110442722 A CN 201110442722A CN 102528234 A CN102528234 A CN 102528234A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/12—Automatic feeding or moving of electrodes or work for spot or seam welding or cutting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/02—Seam welding; Backing means; Inserts
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/095—Monitoring or automatic control of welding parameters
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/10—Other electric circuits therefor; Protective circuits; Remote controls
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Abstract
The invention provides a butt welding method and a butt welding device. The butt welding device (1) comprises a welding torch (2) used for enabling a welding rod (2) to be protruded from a groove (Wb) formed between the end faces (Wa, Wb) of a pair of steel plates (W, W), a mobile trolley (5) used for enabling the welding torch (3) to move along the groove (Wb), a welding power supply (6) and a control part (10). When the welding torch (2) is supplied with power so as to be welded, the welding torch (3) and the mobile trolley (5) are moved together. A weld bead (B) is formed inside the groove (Wb). The control part (10) is provided with a current value measuring unit (11). The current value obtained by the current value measuring unit (11) is compared with the prescribed current valve for obtaining the target thickness of the weld bead, the thickness of the weld bead (B) is kept to be certain so as to determine the mobile speed of the mobile trolley (5).
Description
Technical field
The present invention relates to and to form duct butt-welding method and the opposite soldering device that uses when engaging between the end face of groove against each other with a pair of steel plate.
Background technology
When the butt welding of above-mentioned that kind is the downward welding of the groove between the steel plate of boats and ships or bridge etc. or widely used welding during vertical position welding.In this butt welding, melt through making from welding torch outstanding welding rod in groove, simultaneously, this welding torch is moved along continuous groove, in groove, form welding bead, the translational speed of welding torch or the fusing amount of welding rod are made as necessarily.
In such butt welding is for example welded downwards; Under the dissimilar situation of groove width; Under the fusing amount with the translational speed of welding torch or welding rod keeps certain state, when continuing to weld, can occur concavo-convex on the thickness of the welding bead in groove; Be created in the weld defect that the thickness deficiency of welding bead causes, or generation needs the projection of the back processing of grinding machine processing etc.
For bad phenomenon or inconvenience that the variation of the thickness of eliminating the welding bead in such groove causes, the weld job personnel need often adjust the welding conditions such as translational speed of welding torch according to the variation of groove width.
At present; As not by weld job personnel's hand and adopt the solder technology that to adjust the gimmick of welding condition according to the variation of groove width; For example remove and use is arranged through making the welding torch yaw; Detect groove width arc sensor welding method (Japan speciallys permit No. 1881284) or use welding method (spy of Japan opens flat 11-129071 number) that imageing sensor detects the variation of groove width in addition, also have in the translational speed of the execution welding current inching welding torch that dependency relation is arranged based on the overhang of welding rod and with it and the welding method (Japan speciallys permit No. 1451777) of suitable vertical position welding.
Yet; Specially permit in the welding method of record in No. 1881284 in above-mentioned Japan; Under the situation that does not make the welding torch yaw, can not detect the variation of groove width, in addition; Open in the welding method of record in flat 11-129071 number the spy of Japan, existences needs the welding of other and imageing sensor etc. not have the problem of device of the classification of direct relation.
On the other hand, specially permit in No. 1451777 in the welding method of suitable vertical position welding of record, because according to the translational speed of the variation inching welding torch of the overhang of welding rod in above-mentioned Japan; Therefore, though small variation that can corresponding groove width, under the bigger situation of groove width; Before fully piling up weld metal, welding torch rises, therefore; The quantity not sufficient of weld metal (state of the lack of fusion that the built-up welding amount of weld metal is not enough with respect to the groove volume) will take place; On the other hand, under the narrow situation of groove width, pile up because weld metal is excessive; Can not touch the problem that weld metal continues to weld so have welding rod, solving these problems becomes present problem.
Summary of the invention
The present invention is conceived to above-mentioned present problem and foundes, and its purpose is, a kind of duct butt-welding method and opposite soldering device are provided; Under the situation of welding downwards, even if groove width changes, also need not to use separately arc sensor or with the equipment such as imageing sensor of the no direct relation of welding; Can in groove, form the much the same welding bead of thickness, its result is in multiple-bead deposit; Also can access high quality welding portion, on the other hand, under the situation of vertical position welding; Even groove width changes greatly, also can prevent to produce the quantity not sufficient of weld metal or be absorbed in unweldable situation.
Present inventors are conceived at CO
2In arc welding or the MAG welding, the welding rod in the welding has dependency relation between the overhang of welding torch front end and the execution welding current value of this moment.Particularly, when present inventors are conceived to the overhang length of welding rod, carry out welding current value step-down, on the other hand, the overhang of welding rod is carried out the welding current value and is uprised in short-term.
At this, for example in welding downwards, if welding torch does not move up and down; When then the overhang of welding rod is long, the front end of welding torch and the distance of welding bead, be groove width expansion, the thickness of welding bead reduces thus; On the other hand; The overhang of welding rod in short-term, the distance of the front end of welding torch and welding bead is short, be the groove width constriction, the thickness of welding bead increases thus.
That is, when present inventors find that the scope at the welding current of the welding bead of the thickness that will obtain target is made as desirable welding current scope, carrying out the welding current value when lower than this ideal welding current scope; Can be identified as groove width and enlarge, the thickness wall of welding bead reduces than desired value, on the other hand; When execution welding current value is higher than this ideal welding current scope; Can be identified as the groove width constriction, the thickness of welding bead increases than desired value, finally develops this invention.
Duct butt-welding method of the present invention is the duct butt-welding method of the end face that forms groove against each other of a pair of steel plate being carried out each other downward butt welding or vertical position welding; To from the front end of welding torch outstanding welding rod supply power and make its fusing in said groove; Simultaneously; This welding torch is moved along said groove; In this groove, form welding bead (being weld metal during vertical position welding), at this moment, the translational speed that the execution welding current value that will when forming said welding bead (or weld metal), in said welding rod, circulate is in the said welding torch under the situation in the predefined desirable welding current scope (obtain thickness or highly reach the scope of welding current of welding bead or the weld metal of desired value) is defined as suitable speed; When forming said welding bead, measure said execution welding current value; And execution welding current value that will in this measurement, obtain and said desirable welding current scope compare, under the situation in said execution welding current value is in said desirable welding current scope; Remain unchanged and continue said welding torch to be moved with said suitable speed; Be lower than in said execution welding current value under the situation of lower threshold of said desirable welding current scope, than the low speed of said suitable speed said welding torch moved or to stop and even driving in the wrong direction (for retreating, being decline during vertical position welding during butt welding downwards); Be higher than in said execution welding current value under the situation of upper limit threshold of said desirable welding current scope, make said welding torch move (first aspect present invention) with the speed that surpasses said suitable speed.
Preferably; Preestablishing the low velocity that is lower than said suitable speed perhaps comprises the negative speed that stops and being higher than the high-speed of said suitable speed; Be lower than in said execution welding current value under the situation of lower threshold of said desirable welding current scope; As the translational speed of said welding torch, the negative speed of selecting said low velocity or comprise to stop is higher than in said execution welding current value under the situation of upper limit threshold of said desirable welding current scope; As the translational speed of said welding torch, select said high-speed (second aspect present invention).
In addition; Preferably; To be lower than the multistage low velocity of said suitable speed or comprise the multistage negative speed that stops and multistage being accommodated at a high speed in the database that is higher than said suitable speed; Be lower than in said execution welding current value under the situation of lower threshold of said desirable welding current scope; Select the translational speed of said welding torch in the multistage negative speed that multistage low velocity from said database or comprise stops, surpassing in said execution welding current value under the situation of upper limit threshold of said desirable welding current scope, from said database multistage high-speed, select mobile (third aspect present invention) of said welding torch.
And then; Preferably, be lower than in said execution welding current value under the situation of lower threshold of said desirable welding current scope, through calculating; Decision is than the said suitably translational speed of slow-footed said welding torch; Under the situation of said execution welding current value above the upper limit threshold of said desirable welding current scope, through calculating, decision surpasses the translational speed (fourth aspect present invention) of the said welding torch of said suitable speed.
Opposite soldering device of the present invention possesses: make welding rod in the groove that between a pair of steel plate end face respect to one another, forms outstanding welding torch, make moving part that this welding torch moves along said groove, to the translational speed of the source of welding current of said welding rod supply power, the said moving part of control and welding rod control part from the overhang of said welding torch; When said welding rod supply power makes its fusing; Welding torch is moved along said groove with said moving part; In this groove, form welding bead (being weld metal during vertical position welding); Said control part possesses the current measuring device of in said groove, measuring the execution welding current value that in said welding rod, circulates in the formation welding bead; Said control part is controlled as follows: the translational speed that will be in the said welding torch under the situation in the predefined desirable welding current scope by the execution welding current value that this current measuring device obtains is defined as suitable speed; When forming said welding bead; Measure execution welding current value through said current measuring device; And execution welding current value that will in this measurement, obtain and said desirable welding current scope compare, under the situation in said execution welding current value is in said desirable welding current scope; Remain unchanged and continue said welding torch to be moved with said suitable speed; Be lower than in said execution welding current value under the situation of lower threshold of said desirable welding current scope, than said suitable slow-footed speed said welding torch moved or to stop and even driving in the wrong direction (for retreating, being decline during vertical position welding during butt welding downwards); Under the situation of said execution welding current value, make said welding torch move (fifth aspect present invention) with the speed that surpasses said suitable speed above the upper limit threshold of said desirable welding current scope.
Like this, according to duct butt-welding method of the present invention and opposite soldering device, in butt welding downwards (perhaps butt welding downwards); Relatively welding rod has the execution welding current value of dependency relation and obtains the welding current value that thickness reaches the welding bead of desired value from the overhang of welding torch front end, i.e. variation with groove width; Be based on the situation of the groove width of this identification, welding torch is moved rapidly or slowly move or stop and even retreating, therefore; Even groove width changes, the overhang that also can keep welding rod is for certain.Therefore, in groove, can form the much the same welding bead of thickness, its result in multiple-bead deposit, can access high quality welding portion.
On the other hand, in vertical position welding, relatively welding rod is from the overhang of welding torch front end; Promptly the execution welding current value of dependency relation is arranged and highly reached the welding current value of the weld metal of desired value with the variation of groove width; Be based on the situation of the groove width of this identification, make the rate of climb of welding torch accelerate or slow down or stop and even descending, therefore; Even groove width changes, the overhang that also can keep welding rod is for certain.Therefore, can access be not absorbed in can not weld and in groove the very excellent effect of the weld metal of built-up welding q.s protractedly not.
Description of drawings
Fig. 1 is the side illustration figure of the opposite soldering device of one embodiment of the invention;
Fig. 2 is translational speed control main points and the control key diagram of control flow of portable chassis of butt welding of representing to use the opposite soldering device of Fig. 1 in the lump;
Fig. 3 (a)～(c) is the key diagram that combination view and profile represent to use the opposite soldering device of Fig. 1 to carry out downward butt welding;
Fig. 4 (a) is the plane key diagram that is used for confirming the test body that the test of the effect of duct butt-welding method of the present invention is used, and Fig. 4 (b) representes the chart of this result of the test;
Fig. 5 (a)～(c) is the key diagram that opposite soldering device that combination view and profile represent to use other embodiments of the invention inserts welding torch from the below welding situation when carrying out butt welding in the groove;
The key diagram of the welding situation when Fig. 6 (a)～(d) is to use the opposite soldering device of other embodiment more of the present invention to carry out vertical position welding.
The specific embodiment
Below, based on description of drawings the present invention.
Fig. 1～Fig. 3 representes an embodiment of duct butt-welding method of the present invention and opposite soldering device, and in this embodiment, enumerating the situation that is applicable to downward butt joint arc welding is example, and the present invention is described.
As shown in Figure 1, constitute at this opposite soldering device 1 and to possess: make welding rod 2 outstanding welding torch 3 in the groove Wb that between the end face Wa of a pair of steel plate W of the last placement of iron plate (perhaps ceramic wafer) T, W, Wa, forms; The portable chassis (moving part) 5 that on the track 4 that this welding torch 3 of lift-launch disposes along groove Wb, moves; The source of welding current 6 to welding rod 2 supply powers of giving prominence to from welding torch 3; Control the control part 10 of the translational speed (speed of welding) of portable chassis 5 or the overhang of welding rod 2 etc.,, welding torch 3 is moved with portable chassis 5 along groove Wb, in this groove Wb, form welding bead B when welding rod 2 supply powers make its fusing.
In the case, control part 10 possesses the current value measurement mechanism 11 of measuring the execution welding current value when welding.In this control part 10; Constitute; The execution welding current value that will obtain at current value measurement mechanism 11 (below be current value) and predefined desirable welding current scope (obtaining scope=the settings current value ± threshold value of welding current that thickness reaches the welding bead of desired value) compare, and are the certain translational speed that determines portable chassis 5 of thickness of guaranteeing welding bead B.
Particularly; In this embodiment; Constituting of control part 10 after the translational speed of the portable chassis 5 under the situation in will being in above-mentioned desirable welding current scope by the current value that current value measurement mechanism 11 obtains is defined as suitable speed, measured current value through current measuring device 11 when forming welding bead B; And; The current value that in this measurement, obtain and desirable welding current scope compare, and under the situation in current value is in desirable welding current scope, remaining unchanged moves portable chassis 5 with existing suitable speed.
In addition; Constituting of control part 10 after preestablishing the low velocity that is lower than suitable speed or comprising the astern speed that stops and being higher than suitable speed high-speed, is lower than at current value under the situation of lower threshold of desirable welding current scope; Translational speed as portable chassis 5; Select low velocity or comprise the astern speed that stops, on the other hand, being higher than at current value under the situation of upper limit threshold of desirable welding current scope; As the translational speed of portable chassis 5, select high-speed.
Carrying out under the situation of downward butt welding through this opposite soldering device 1, at first, welding power supply 6 certainly, making welding rod 2 fusings in the groove Wb between a pair of steel plate W, W to welding rod 2 supply powers of giving prominence to from welding torch 3.
Meanwhile; From 10 pairs of portable chassis 5 of control part; Shown in the chart among Fig. 2; Send current value I b and be in translational speed under the situation in the above-mentioned desirable welding current scope (setting current value I C ± threshold value H, L), promptly can form the move of suitable speed Vc that thickness reaches the welding bead B of desired value, portable chassis 5 is beginning to move with suitable speed Vc on the track 4 of groove Wb configuration.Through moving of this movable type chassis 5; In groove Wb, form the welding bead B that welding rod 2 fusings are formed, in this welding, in the step S1 of the control flow of Fig. 2; Through the current value measurement mechanism 11 of control part 10, measure the current value I b that dependency relation is arranged with the overhang of welding rod 2.
Then; In step S2; Through control part 10, carry out the comparison of above-mentioned current value I b that obtains and predefined desirable welding current scope (obtaining the scope=upper limit threshold H～setting current value I c～lower threshold L of welding current that thickness reaches the welding bead B of desired value).
At this moment, under the situation in current value I b is in desirable welding current scope, through control part 10; Shown in Fig. 3 (a), the overhang of judging welding rod 2 for suitably, be that the thickness of welding bead B is desired value, in the step S3 of the control flow of Fig. 2; Translational speed (speed of welding) V as portable chassis 5; Select suitable speed Vc, therefore, portable chassis 5 does not change speed and moves with this suitable speed Vc.In addition, the symbol BW of the plane of Fig. 3 (a) representes the deposite metal part of the front end of welding bead B, below shown in Fig. 3 (b), (c) though plane in each symbol BW different each other, all be expressed as deposite metal part with volume.
In addition, be higher than at current value I b under the situation of upper limit threshold H of desirable welding current scope, through control part 10; Shown in Fig. 3 (b), the overhang that is judged as welding rod 2 lacks, is the narrowed width of groove Wb that the thickness of welding bead B is higher than desired value; In the step S3 of the control flow of Fig. 2; Select to surpass the speed VH of suitable speed Vc, therefore, portable chassis 5 runs becomes the position of desired value to the thickness of welding bead B.
On the other hand, be lower than at current value I b under the situation of lower threshold L of desirable welding current scope, through control part 10; Shown in Fig. 3 (C), the overhang that is judged as welding rod 2 is long, be that the width of groove Wb broadens, and the thickness of welding bead B is thinner than desired value; In the step S3 of the control flow of Fig. 2,, select than the slow translational speed VL of above-mentioned suitable speed Vc as the translational speed V of portable chassis 5; So that the thickness of welding bead B reaches desired value, therefore, portable chassis 5 moves with translational speed VL.In addition, the thickness of welding bead B than the significantly thin partially situation of desired value under, the value of translational speed VL is chosen as zero sometimes, or is chosen as negatively, in this case, portable chassis 5 can temporarily stop or retreating.
Like this, in the duct butt-welding method and opposite soldering device 1 of above-mentioned present embodiment, to welding rod 2 from the overhang of welding torch 3 front ends, promptly with the variation of the width of groove Wb the current value I b of dependency relation is arranged and is used to obtain the setting current value I c that thickness reaches the welding bead B of desired value and compare; Be based on the situation of width of the groove Wb of this identification; Move to carry the portable chassis 5 of welding torch 3 rapidly with translational speed VH, or slowly move the portable chassis 5 that carries (comprise stop and even retreating) welding torch 3, therefore with translational speed VL; Even the width of groove Wb changes; The overhang that also can keep welding rod 2 can be formed on the much the same welding bead B of thickness in the groove Wb, its result for certain; In multiple-bead deposit, also can obtain high quality welding portion.
Below, for the effect of the downward butt welding of the opposite soldering device 1 of confirming to use present embodiment, shown in Fig. 4 (a),, carry out the test welding of the downward duct butt-welding method of present embodiment with respect to the test body S of the change width that makes groove Sb.
At this, in above-mentioned butt welding, the thickness of the welding bead B that mobile (welding bead) of 1 time welding torch 3 piled up is about 5mm, in the steel plate butt welding each other if any heavy wall, surpasses 5mm and piles up under the situation of weld metal, becomes multiple-bead deposit.
Be no more than in the butt welding under the situation of 25mm at the thickness of slab of steel plate; Owing to have only welding rod 2 to insert in the groove Sb; So the width of groove Sb becomes about 5～6mm, on the other hand, be in the butt welding under the situation more than the 25mm at the thickness of slab of steel plate; Under the situation in the welding torch 3 insertion groove Sb, the width of the welding torch inserting side of groove Sb becomes more than the 30mm.
Like this, the width of groove Sb or bevel angle are carried out various changes through welding condition, on this basis; In this test welding; With respect to weld length 400mm, the width of groove Sb is made as from Umm and changes to 1.6Umm, and the width of groove Sb begins welding with the end of Umm as initial part.Its result is shown in Fig. 4 (b).In addition, the solid line among this Fig. 4 (b) is illustrated in the variation that the translational speed V of portable chassis 5 is remained the thickness of the welding bead B under the situation of welding under certain state.
Result of the test by shown in Fig. 4 (b) learns, when remaining at the translational speed V with portable chassis 5 when welding under certain state, along with the width widen of groove Sb; The thickness of welding bead reduces gradually; Relative with it, in the downward duct butt-welding method of present embodiment, for the first time under arbitrary situation of the situation (result of the test 2) of the situation (result of the test 1) of test and the test second time; Irrelevant with the variation of the width of groove Sb, the thickness of welding bead is all roughly constant.
Therefore, confirm in the downward duct butt-welding method of present embodiment, irrelevant with the variation of the width of groove Sb, can form the much the same welding bead of thickness.
In addition, the control of translational speed V that is used to determine to be equipped with the portable chassis 5 of welding torch 3 is not the control that is defined in the above embodiments.
For example; Can be with above-mentioned suitable speed Vc, the multistage low velocity that is lower than this suitable speed Vc or multistage being accommodated at a high speed in the database that comprise the multistage astern speed that stops and being higher than suitable speed Vc; Afterwards; Comparison based on current value I b that obtains by current measuring device 11 and desirable welding current scope; As the translational speed V of portable chassis 5, from database, select above-mentioned suitable speed Vc, comprise any one among multistage low velocity VL that stops and even retreating and the multistage high-speed VH.
In addition, be lower than the lower threshold L of desirable welding current scope or be higher than under the situation of upper limit threshold H at current value I b, can be through calculating, decision is than the slow translational speed VL of suitable speed Vc or be higher than the translational speed VH of suitable speed Vc.
In the above embodiments; Enumerating the situation that duct butt-welding method of the present invention and opposite soldering device be applicable to downward butt joint arc welding is that example is illustrated; But be not to be defined in this; As other embodiment, can duct butt-welding method of the present invention and opposite soldering device be applicable to and upwards dock arc welding (with respect to groove below this groove, and inserting the welding that welding rod carries out from welding direction the place ahead) or erect the butt joint arc welding or laterally dock arc welding.
Above-mentioned opposite soldering device 1 is being applicable under the situation of upwards docking arc welding; In the time of in current value I b is in desirable welding current scope, shown in Fig. 5 (a), judge that the thickness of welding bead B is desired value; Translational speed (speed of welding) V as portable chassis 5; Select suitable speed Vc, therefore, portable chassis 5 does not change speed and moves with this suitable speed Vc.In addition, the symbol BW in the plane of Fig. 5 (a) representes the deposite metal part of the front end of welding bead B, below shown in Fig. 5 (b), (c) though each symbol BW shape of plane differ from one another and all be expressed as deposite metal part with volume.
In addition; When current value I b is higher than the upper limit threshold H of desirable welding current scope; Shown in Fig. 5 (b), the overhang that is judged to be welding rod 2 lacks, is the narrowed width of groove Wb that the thickness of welding bead B is thicker than desired value; Select to surpass the speed VH of suitable speed Vc, portable chassis 5 runs becomes the position of desired value to the thickness of welding bead B.
On the other hand, when current value I b is lower than the lower threshold L of desirable welding current scope, shown in Fig. 5 (c); The overhang that is judged as welding rod 2 is long, be that the width of groove Wb broadens; The thickness of welding bead B is thinner than desired value, selects than the slow translational speed VL of above-mentioned suitable speed Vc, so that the thickness of welding bead B reaches desired value as the translational speed V of portable chassis 5; Therefore, portable chassis 5 moves with translational speed VL.In addition, the thickness of welding bead B than the significantly thin partially situation of desired value under, the value of translational speed VL is chosen as zero or be chosen as negatively sometimes, under these circumstances, portable chassis 5 temporarily stops or retreating.
Under the situation that erects the butt joint arc welding; Shown in Fig. 6 (a); To thickness of slab be the steel plate W of 20～50mm, groove Wb between the W piles up weld metal (welding bead) Ba with a welding bead, at this moment, the front end of welding torch 3 is inserted in the groove Wb from upside or side; Therefore, the width of the welding torch inserting side of groove Wb is more than the 30mm.
Use under the situation of above-mentioned opposite soldering device 1 in such erecting in the butt joint arc welding; In the time of in current value I b is in desirable welding current scope; Shown in Fig. 6 (b); The height that is judged as metalwork 15, the weld metal between 15 (welding bead) Ba is a desired value, selects suitable speed as the rate of climb (speed of welding) of welding torch 3, and welding torch 3 does not change the rate of climb and rises.
In addition, when current value I b is lower than the lower threshold L of desirable welding current scope, shown in Fig. 6 (c); Be judged as the overhang long (width of groove Wb is wide) of the welding rod 2 of 15,15 of metalworks; It is low that the aspect ratio of weld metal Ba requires, and as the rate of climb (speed of welding) of welding torch 3, selects than the above-mentioned suitable slow-footed rate of climb; So that butt welding highly is the weld metal Ba of desired value, welding torch 3 rises with the slow rate of climb.In addition, under the aspect ratio desired value of weld metal Ba situation significantly on the low side, the value of the rate of climb of welding torch 3 is chosen as zero and even negative sometimes, and under these circumstances, welding torch 3 temporarily stops or descending.
On the other hand, when current value I b is higher than the upper limit threshold H of desirable welding current scope, shown in Fig. 6 (d); Be judged as the overhang short (narrow width of groove Wb) of welding rod 2, the aspect ratio desired value of weld metal Ba is high, therefore; The rate of climb (speed of welding) as welding torch 3; Selection is than the above-mentioned suitable fireballing rate of climb, and welding torch 3 is with rate of climb rising fast, and the height that moves to weld metal Ba rapidly becomes the position of the height of desired value.
More than, the embodiment of duct butt-welding method of the present invention and opposite soldering device is illustrated, but the formation of duct butt-welding method of the present invention and opposite soldering device is not the formation that is defined in the above embodiments.
Claims (5)
1. duct butt-welding method is carried out butt welding each other with the end face that forms groove against each other of a pair of steel plate, it is characterized in that,
To from the front end of welding torch outstanding welding rod supply power and make its fusing in said groove, simultaneously, this welding torch is moved along said groove, in this groove, form welding bead, at this moment,
The translational speed that the execution welding current value that will when forming said welding bead, in said welding rod, circulate is in the said welding torch under the situation in the predefined desirable welding current scope is defined as suitable speed,
When forming said welding bead, measure said execution welding current value, and execution welding current value that will in this measurement, obtain and said desirable welding current scope compare,
Under the situation in said execution welding current value is in said desirable welding current scope, remain unchanged and continue said welding torch to be moved with said suitable speed,
Be lower than in said execution welding current value under the situation of lower threshold of said desirable welding current scope, than the low speed of said suitable speed said welding torch being moved or to stop and even driving in the wrong direction,
Be higher than in said execution welding current value under the situation of upper limit threshold of said desirable welding current scope, said welding torch moved with the speed that surpasses said suitable speed.
2. duct butt-welding method as claimed in claim 1; It is characterized in that; Preestablish the low velocity that is lower than said suitable speed or comprise the negative speed that stops and being higher than the high-speed of said suitable speed, be lower than in said execution welding current value under the situation of lower threshold of said desirable welding current scope, as the translational speed of said welding torch; Select said low velocity or comprise the negative speed that stops; Be higher than in said execution welding current value under the situation of upper limit threshold of said desirable welding current scope,, select said high-speed as the translational speed of said welding torch.
3. duct butt-welding method as claimed in claim 1; It is characterized in that; To be lower than the multistage low velocity of said suitable speed or comprise the multistage negative speed that stops and multistage being accommodated at a high speed in the database that is higher than said suitable speed; Be lower than in said execution welding current value under the situation of lower threshold of said desirable welding current scope; Multistage low velocity from said database perhaps comprises the translational speed of selecting said welding torch in the multistage negative speed that stops; Surpass in said execution welding current value under the situation of upper limit threshold of said desirable welding current scope, from said database multistage high-speed, select the mobile of said welding torch.
4. duct butt-welding method as claimed in claim 1; It is characterized in that, be lower than in said execution welding current value under the situation of lower threshold of said desirable welding current scope, through calculating; Decision is than the said suitably translational speed of slow-footed said welding torch; Under the situation of said execution welding current value above the upper limit threshold of said desirable welding current scope, through calculating, decision surpasses the translational speed of the said welding torch of said suitable speed.
5. opposite soldering device; Possess: make welding rod in the groove that between a pair of steel plate end face respect to one another, forms outstanding welding torch, make moving part that this welding torch moves along said groove, to the translational speed of the source of welding current of said welding rod supply power, the said moving part of control and welding rod control part from the overhang of said welding torch; When said welding rod supply power makes its fusing; Welding torch is moved along said groove with said moving part; In this groove, form welding bead, it is characterized in that
Said control part possesses the current measuring device of in said groove, measuring the execution welding current value that in said welding rod, circulates in the formation welding bead; Said control part is controlled as follows: the translational speed that will be in the said welding torch under the situation in the predefined desirable welding current scope by the execution welding current value that this current measuring device obtains is defined as suitable speed; When forming said welding bead; Measure execution welding current value through said current measuring device; And; Execution welding current value that will in this measurement, obtain and said desirable welding current scope compare, and under the situation in said execution welding current value is in said desirable welding current scope, remain unchanged and continue with said suitable speed said welding torch to be moved; Be lower than in said execution welding current value under the situation of lower threshold of said desirable welding current scope; Than said suitable slow-footed speed said welding torch moved or to stop and even driving in the wrong direction, surpass in said execution welding current value under the situation of upper limit threshold of said desirable welding current scope, with the speed that surpasses said suitable speed said welding torch is moved.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2010289930A JP2012135793A (en) | 2010-12-27 | 2010-12-27 | Butt welding method, and butt welding device |
| JP2010-289930 | 2010-12-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102528234A true CN102528234A (en) | 2012-07-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011104427229A Pending CN102528234A (en) | 2010-12-27 | 2011-12-27 | Butt welding method and butt welding device |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP2012135793A (en) |
| KR (1) | KR101347753B1 (en) |
| CN (1) | CN102528234A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105008080A (en) * | 2013-02-25 | 2015-10-28 | 大宇造船海洋（株） | Butt joint welding apparatus and method therefor |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6052798B2 (en) * | 2013-07-08 | 2016-12-27 | 株式会社神戸製鋼所 | Abnormality monitoring device for automatic welding machine |
| AT516323B1 (en) * | 2014-10-14 | 2016-06-15 | Berndorf Band Gmbh | Method and device for welding at least two metal strips |
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| JP2003103369A (en) * | 2001-09-26 | 2003-04-08 | Daihen Corp | Ac pulse welding method |
| JP4109911B2 (en) * | 2002-06-17 | 2008-07-02 | 株式会社日立製作所 | Multi-layer welding method |
| KR101037894B1 (en) * | 2008-09-23 | 2011-05-30 | 에스티엑스조선해양 주식회사 | Torch triangle weaving method for welding on horizontal position |
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2010
- 2010-12-27 JP JP2010289930A patent/JP2012135793A/en active Pending
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- 2011-12-23 KR KR1020110141363A patent/KR101347753B1/en not_active IP Right Cessation
- 2011-12-27 CN CN2011104427229A patent/CN102528234A/en active Pending
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| JPS5550980A (en) * | 1978-10-06 | 1980-04-14 | Nippon Steel Corp | Consumable electrode type arc welding device |
| JPS55109576A (en) * | 1979-02-16 | 1980-08-23 | Nippon Steel Corp | Automatic narrow gap welding method |
| JPS6380970A (en) * | 1986-09-22 | 1988-04-11 | Nippon Steel Corp | One side welding method |
| JPS6415279A (en) * | 1987-07-10 | 1989-01-19 | Nippon Kokan Kk | Bead control method for automatic one-side welding |
| CN1031344A (en) * | 1987-07-20 | 1989-03-01 | 日本钢管株式会社 | Automatic arc-welding method |
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| CN105008080A (en) * | 2013-02-25 | 2015-10-28 | 大宇造船海洋（株） | Butt joint welding apparatus and method therefor |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20120074231A (en) | 2012-07-05 |
| JP2012135793A (en) | 2012-07-19 |
| KR101347753B1 (en) | 2014-01-03 |
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