CN110508926A - A kind of method of Laser-MIG Composite Welding - Google Patents
A kind of method of Laser-MIG Composite Welding Download PDFInfo
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- CN110508926A CN110508926A CN201910849460.4A CN201910849460A CN110508926A CN 110508926 A CN110508926 A CN 110508926A CN 201910849460 A CN201910849460 A CN 201910849460A CN 110508926 A CN110508926 A CN 110508926A
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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
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/346—Working by laser beam, e.g. welding, cutting or boring in combination with welding or cutting covered by groups B23K5/00 - B23K25/00, e.g. in combination with resistance welding
- B23K26/348—Working by laser beam, e.g. welding, cutting or boring in combination with welding or cutting covered by groups B23K5/00 - B23K25/00, e.g. in combination with resistance welding in combination with arc heating, e.g. TIG [tungsten inert gas], MIG [metal inert gas] or plasma welding
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Abstract
The invention discloses a kind of methods of Laser-MIG Composite Welding, comprising steps of the processing of the high-strength steel curved beam blocks of one, Q690；Two, the cleaning of the high-strength steel curved beam blocks of Q690；Three, the welding of the high-strength steel curved beam blocks of Q690；Four, the heat treatment after welding.The method of the present invention step is simple, design is reasonable and easy to operate, completes the welding to the high-strength steel curved beam of Q690, reduces welding wire dosage, promotes welding processing efficiency and weldquality stability, mitigates the labor intensity of worker significantly.
Description
Technical field
The invention belongs to test specimen welding technology fields, more particularly, to a kind of method of Laser-MIG Composite Welding.
Background technique
Coal is one of the mainstay of one of main source of national energy and national economy, and coalcutter is as coal
The capital equipment of charcoal production, the reliable and stability of operation are the important leverages of coal enterprise's production capacity.Electric cabinet in coalcutter
Q690 high strength steel material is used in main structure, the welding method of traditional electric cabinet main structure is manual welding or electric arc
Welding, workpiece displacement process is cumbersome when welding, and production efficiency is low；In addition Q690 steel belongs to high-strength welding structure steel, have compared with
High yield strength and tensile strength, quality stability is poor, and explosion-proof anti-seismic performance is low.Therefore, nowadays lack a kind of design conjunction
The method of the Laser-MIG Composite Welding of reason completes the welding to the high-strength steel curved beam of Q690, reduces welding wire dosage, promotes welding and adds
Work efficiency rate and weldquality stability mitigate the labor intensity of worker significantly, and the welding for electric cabinet main structure provides foundation,
To improve the explosion-proof anti-seismic performance of electric cabinet main structure.
Summary of the invention
In view of the above-mentioned deficiencies in the prior art, the technical problem to be solved by the present invention is that providing a kind of laser-MIG
The method of composite welding, method and step is simple, design is reasonable and easy to operate, completes the welding to the high-strength steel curved beam of Q690,
Welding wire dosage is reduced, welding processing efficiency and weldquality stability is promoted, mitigates the labor intensity of worker significantly, is electric cabinet
The welding of main structure provides foundation, to improve the explosion-proof anti-seismic performance of electric cabinet main structure.
In order to solve the above technical problems, the technical solution adopted by the present invention is that: a kind of method of Laser-MIG Composite Welding,
It is characterized in that, method includes the following steps:
Step 1: the processing of the high-strength steel curved beam blocks of Q690:
Process the high-strength steel curved beam of the first Q690 and the 2nd high-strength steel curved beam of Q690；Wherein, the high-strength steel curved beam packet of the first Q690
Include first horizontal portion and with the first horizontal portion integrally formed first right-angled trapezium portion, the bottom in first right-angled trapezium portion
Face length is less than the length of first horizontal portion；The structure of the 2nd high-strength steel curved beam of Q690 is all the same, including the second horizontal part and with
Second horizontal part integrally formed second right-angled trapezium portion, the base length in second right-angled trapezium portion is less than the second water
The length in flat portion；
Step 2: the cleaning of the high-strength steel curved beam blocks of Q690:
The high-strength steel curved beam of first Q690 and the 2nd high-strength steel curved beam of Q690 are cleaned；
Step 3: the welding of the high-strength steel curved beam blocks of Q690:
Step 301, by after cleaning the high-strength steel curved beam of the first Q690 and the 2nd high-strength steel curved beam of Q690 be mounted on welding bench
On；Wherein, the inclined-plane in the first right-angled trapezium portion towards the second right-angled trapezium portion inclined-plane, first horizontal portion and the second horizontal part it
Between gap is set, and the horizontal space in gap is 2mm~2.5mm, gap between first horizontal portion and the second horizontal part and
Gap to be welded is formed between the inclined-plane in the first right-angled trapezium portion and the inclined-plane in the second right-angled trapezium portion；
Step 302, in the high-strength steel curved beam of the first Q690 and the high-strength steel curved beam bottom the 2nd Q690, using flame gun along first
The width direction of horizontal part and the second horizontal part moves back and forth, so that flame gun is to first horizontal portion and the second horizontal part to pre-
Thermal region carries out the pre-heat treatment；
Step 303, using optical fiber laser and welding robot to after the pre-heat treatment the high-strength steel curved beam of the first Q690 and
The high-strength steel curved beam of 2nd Q690 carries out first time welding, and detailed process is as follows:
Step 3031, under a shielding gas emits laser perpendicular projection to gap to be welded using optical fiber laser, uses
Length direction of the welding robot installation welding wire along gap to be welded is treated welding gap and is once welded, and is formed under first
Layer；Wherein, the laser that optical fiber laser emits in welding process is located at the front of welding wire；
Step 3032, under a shielding gas emits laser perpendicular projection to gap to be welded using optical fiber laser, uses
Welding robot installation welding wire is welded next time on a upper lower layer, forms next lower layer, successively obtains the
Two lower layers ..., N1A lower layer, and N1The surface of a lower layer and the surface of first horizontal portion and the second horizontal part
It is flush；Wherein, N1For total number of plies of first time welding, N1For positive integer, N1≥5；
It is step 304, high-strength to the high-strength steel curved beam of the first Q690 and the 2nd Q690 using optical fiber laser and welding robot
Steel curved beam carries out second and welds, and detailed process is as follows:
Step 3041, under a shielding gas emits laser perpendicular projection to gap to be welded using optical fiber laser, uses
Welding robot installs welding wire in N1It is welded on a lower layer along gap length direction to be welded, obtains lower weldering in first
Road；
Step 3042, under a shielding gas emits laser perpendicular projection to gap to be welded using optical fiber laser, uses
Welding robot installs welding wire in N1It is welded on a lower layer along gap length direction to be welded, obtains lower weldering in second
Road forms lower layer in first；Wherein, width side of the lower welding bead along crack to be welded in lower welding bead and second in first
To laying, it is 1mm~1.2mm that the lap width of lower welding bead in welding bead and second is descended in first；
Step 3043 repeats step 3041 and step 3042, is welded, is formed next time on lower layer in upper one
Lower layer in next, successively obtain lower layer in second ..., N2Lower layer in a, and N2The table of lower layer in a
Identity distance is 5mm~6mm from first horizontal portion and the spacing on the surface of the second horizontal part；Wherein, N2For total layer of second of welding
Number, N2For positive integer, N2≥2；
It is step 305, high-strength to the high-strength steel curved beam of the first Q690 and the 2nd Q690 using optical fiber laser and welding robot
Steel curved beam carries out third time welding, and detailed process is as follows:
Step 3051, under a shielding gas emits laser perpendicular projection to gap to be welded using optical fiber laser, uses
Welding robot installs welding wire in N2It is welded on lower layer along gap length direction to be welded in a, obtains upper weldering in first
Road；
Step 3052, under a shielding gas emits laser perpendicular projection to gap to be welded using optical fiber laser, uses
Welding robot installs welding wire in N2It is welded on lower layer along gap length direction to be welded in a, obtains upper weldering in second
Road；
Step 3053, under a shielding gas emits laser perpendicular projection to gap to be welded using optical fiber laser, uses
Welding robot installs welding wire in N2It is welded on lower layer along gap length direction to be welded in a, obtains upper weldering in third
Road forms upper layer in first；
Step 3054 repeats step 3051 and step 3053, is welded, is formed next time on upper layer in upper one
Upper layer in next, successively obtain upper layer in second ..., N3Upper layer in a, and N3The table of upper layer in a
Identity distance is from N2The spacing on the surface of lower layer is 3mm~6mm in a；Wherein, N3For total number of plies of third time welding, N3It is positive
Integer, N3≥2；
It is step 306, high-strength to the high-strength steel curved beam of the first Q690 and the 2nd Q690 using optical fiber laser and welding robot
Steel curved beam carries out the 4th welding, and detailed process is as follows:
Step 3061, under a shielding gas emits laser perpendicular projection to gap to be welded using optical fiber laser, uses
Welding robot installs welding wire in N3It is welded on upper layer along gap length direction to be welded in a, obtains first upper weldering
Road；
Step 3062, under a shielding gas emits laser perpendicular projection to gap to be welded using optical fiber laser, uses
Welding robot installs welding wire in N3It is welded on upper layer along gap length direction to be welded in a, obtains second upper weldering
Road；
Step 3063, under a shielding gas emits laser perpendicular projection to gap to be welded using optical fiber laser, uses
Welding robot installs welding wire in N3It is welded on upper layer along gap length direction to be welded in a, obtains the upper weldering of third
Road；
Step 3064, under a shielding gas emits laser perpendicular projection to gap to be welded using optical fiber laser, uses
Welding robot installs welding wire in N3It is welded on upper layer along gap length direction to be welded in a, obtains the 4th upper weldering
Road forms first upper layer；
Step 3065 repeats step 3061 and step 3064, is welded next time on upper one upper layer, under formation
One upper layer, successively obtain second upper layer ..., N4A upper layer, until N4The surface and first of a upper layer
Right-angled trapezium portion and the surface in the second right-angled trapezium portion are flush, and complete the high-strength steel curved beam of the first Q690 and the 2nd Q690 high-strength steel
The welding of welding seam to be welded between sample obtains Q690 high-strength steel weldment；Wherein, N4For total number of plies of third time welding, N4
For positive integer, N4≥2；
Step 4: the heat treatment after welding:
Q690 high-strength steel weldment is placed in incubator and is heat-treated；Wherein, the temperature of heat treatment is 500~550
DEG C, the time of heat treatment is 3h~4h.
The method of above-mentioned a kind of Laser-MIG Composite Welding, it is characterised in that: the protective gas is by volume content
The carbon dioxide that 80% argon gas and volume content is 20% forms, the gas flow of the protective gas be 18L/min~
25L/min；
Spacing of the laser head of optical fiber laser apart from gap bottom to be welded is 106mm~110mm, optical fiber laser
Power is 2500W~3300W, and the wavelength that optical fiber laser emits laser is 1070nm, the laser of optical fiber laser transmitting and weldering
Silk close to crack to be welded one end between spacing be 3mm~3.5mm, optical fiber laser transmitting laser and welding wire close to
The angle formed between one end of weld crack is 30 °~40 °；
When welding robot welds, weldingvoltage is 20V~25V, the one end and laser of welding wire close to crack to be welded
Movement speed is 60m/s~65m/s, and the wire feed rate of welding robot is 6.7m/min~7m/min.
The method of above-mentioned a kind of Laser-MIG Composite Welding, it is characterised in that: the gage of wire of welding is for the first time
The gage of wire of 1.5mm~1.8mm, second of welding, third time welding and the 4th welding are 1.0mm~1.4mm；
First lower layer in step 303, second lower layer ..., N1The thickness of a lower layer be 3mm~
3.5mm；
Lower layer in first in step 304, lower layer in second ..., N2The thickness of lower layer is in a
2.5mm~3mm；
Upper layer in first in step 305, upper layer in second ..., N3The thickness of upper layer is in a
1.5mm~3mm.
First upper layer in step 306, second upper layer ..., N4The thickness of a upper layer be 1.5mm~
2.5mm。
A kind of method of above-mentioned Laser-MIG Composite Welding, it is characterised in that: the high-strength steel curved beam blocks of Q690 in step 2
Cleaning, detailed process is as follows:
The high-strength steel curved beam of first Q690 and the 2nd high-strength steel curved beam of Q690 are put into pure water by step 201, and using soft
Hair toothbrush is scrubbed, and is then flushed three times with pure water；
Step 202 dips ethanol solution using glasses cloth, to the high-strength steel curved beam of the first Q690 and the 2nd Q690 after flushing
High-strength steel curved beam is cleaned；Wherein, cleaning the time is 10min~14min.
A kind of method of above-mentioned Laser-MIG Composite Welding, it is characterised in that: in step 304 in first lower welding bead and
Width direction of the welding bead along crack to be welded is laid down in second, and the overlap joint of lower welding bead in welding bead and second is descended in first
Width is 1mm~1.2mm；Upper welding bead in first in step 305, in second in upper welding bead and third upper welding bead along to be welded
The width direction for connecing crack is laid, the lap width in first in upper welding bead and second between upper welding bead with second on
Lap width in welding bead and third between upper welding bead is 1mm~1.2mm；
First upper welding bead, second upper welding bead, the upper welding bead of third and the 4th upper welding bead are along to be welded in step 306
The width direction in crack is laid, lap width, second upper welding bead between first upper welding bead and second upper welding bead and the
The lap width between the upper welding bead of lap width and third and the 4th upper welding bead between three upper welding beads be 1mm~
1.2mm。
A kind of method of above-mentioned Laser-MIG Composite Welding, it is characterised in that: the inclined-plane in first right-angled trapezium portion
Angle between vertical direction is 15 °~25 °, and the angle between the inclined-plane and vertical direction in second right-angled trapezium portion is
15 °~25 °.
The method of above-mentioned a kind of Laser-MIG Composite Welding, it is characterised in that: the temperature of the pre-heat treatment is in step 302
150 DEG C~200 DEG C, time of the pre-heat treatment is 2min~5min, and first horizontal portion and the second horizontal part are to preheated zone
The minimum widith edge 100mm~110mm of first horizontal portion and the second horizontal part apart from gap to be welded.
Compared with the prior art, the present invention has the following advantages:
1, the method for the present invention step is simple, design is reasonable and it is convenient to realize.
2, the present invention first carries out the processing of the high-strength steel curved beam blocks of Q690, then cleans to the high-strength steel curved beam blocks of Q690,
Multi-layer welding is carried out to the high-strength steel curved beam blocks of Q690 after cleaning using optical fiber laser and welding robot later, obtains Q690
High-strength steel weldment, finally, being answered with eliminating welding obtaining Q690 high-strength steel weldment and being placed in incubator to be heat-treated
Power, to improve the quality stability of Q690 high-strength steel weldment long-time service and the safety of work.
3, when the present invention welds Q690 high-strength steel curved beam blocks, using optical fiber laser and welding robot to first
The high-strength steel curved beam of Q690 and the 2nd high-strength steel curved beam of Q690 carry out respectively first time welding, second welding, third time welding and
4th welding, to improve the flexibility and precision of welding process, it is ensured that structural member welding quality and reduction welding deformation, separately
Outside, convenient for being adjusted according to the width in gap to be welded, welding wire dosage is reduced, the big seam to be welded of depth-to-width ratio is effectively adapted to
Gap.
4, welding efficiency of the present invention is high, and the welding of the high-strength steel curved beam of Q690 can be rapidly completed, substantially reduce the labour of worker,
Saving of work and time, and the welding for electric cabinet main structure provides foundation, to improve the explosion-proof anti-seismic performance of electric cabinet main structure.
In conclusion the method for the present invention step is simple, design is reasonable and easy to operate, complete to the high-strength steel curved beam of Q690
Welding reduces welding wire dosage, promotes welding processing efficiency and weldquality stability, mitigates the labor intensity of worker significantly, be
The welding of electric cabinet main structure provides foundation, to improve the explosion-proof anti-seismic performance of electric cabinet main structure.
Below by drawings and examples, technical scheme of the present invention will be described in further detail.
Detailed description of the invention
Fig. 1 is method flow schematic diagram of the invention.
Fig. 2 is the structural schematic diagram of the first Q690 of the present invention high-strength steel curved beam and the 2nd high-strength steel curved beam of Q690.
Description of symbols:
1-the one high-strength steel curved beam of Q690；1-1-first horizontal portion；The first right-angled trapezium of 1-2-portion；
2-the two high-strength steel curved beam of Q690；The second horizontal part of 2-1-；The second right-angled trapezium of 2-2-portion.
Specific embodiment
A kind of method of Laser-MIG Composite Welding of the invention is described by embodiment 1- embodiment 3.
Embodiment 1
As depicted in figs. 1 and 2, the method for the present invention includes the following steps:
Step 1: the processing of the high-strength steel curved beam blocks of Q690:
Process the high-strength steel curved beam 1 of the first Q690 and the high-strength steel curved beam 2 of the 2nd Q690；Wherein, the high-strength steel curved beam 1 of the first Q690
It is straight including first horizontal portion 1-1 and with the first horizontal portion 1-1 integrally formed first right-angled trapezium portion 1-2, described first
The base length of the trapezoidal portion 1-2 in angle is less than the length of first horizontal portion 1-1；The structure of the high-strength steel curved beam 2 of 2nd Q690 is all the same,
It is straight including the second horizontal part 2-1 and with the second horizontal part 2-1 integrally formed second right-angled trapezium portion 2-2, described second
Length of the base length of the trapezoidal portion 2-2 in angle less than the second horizontal part 2-1；
Step 2: the cleaning of the high-strength steel curved beam blocks of Q690:
The high-strength steel curved beam 1 of first Q690 and the high-strength steel curved beam 2 of the 2nd Q690 are cleaned；
Step 3: the welding of the high-strength steel curved beam blocks of Q690:
Step 301, by after cleaning the high-strength steel curved beam 1 of the first Q690 and the high-strength steel curved beam 2 of the 2nd Q690 be mounted on welding
On platform；Wherein, the first right-angled trapezium portion 1-2 inclined-plane towards the second right-angled trapezium portion 2-2 inclined-plane, first horizontal portion 1-1 and
Gap is set between the second horizontal part 2-1, and the horizontal space in gap is 2mm, first horizontal portion 1-1 and the second horizontal part 2-1
Between gap and the first right-angled trapezium portion 1-2 inclined-plane and the second right-angled trapezium portion 2-2 inclined-plane between formed it is to be welded
Gap；
Step 302, in the high-strength steel curved beam 1 of the first Q690 and high-strength 2 bottom of steel curved beam the 2nd Q690, using flame gun along
The width direction of one horizontal part 1-1 and the second horizontal part 2-1 move back and forth, so that flame gun is to first horizontal portion 1-1 and second
Horizontal part 2-1's carries out the pre-heat treatment to preheated zone；
Step 303, using optical fiber laser and welding robot to high-strength 1 and of steel curved beam of the first Q690 after the pre-heat treatment
The high-strength steel curved beam 2 of 2nd Q690 carries out first time welding, and detailed process is as follows:
Step 3031, under a shielding gas emits laser perpendicular projection to gap to be welded using optical fiber laser, uses
Length direction of the welding robot installation welding wire along gap to be welded is treated welding gap and is once welded, and is formed under first
Layer；Wherein, the laser that optical fiber laser emits in welding process is located at the front of welding wire；
Step 3032, under a shielding gas emits laser perpendicular projection to gap to be welded using optical fiber laser, uses
Welding robot installation welding wire is welded next time on a upper lower layer, forms next lower layer, successively obtains the
Two lower layers ..., N1A lower layer, and N1The surface of a lower layer and first horizontal portion 1-1 and the second horizontal part 2-1
Surface be flush；Wherein, N1For total number of plies of first time welding, N1For positive integer, N1≥5；
It is step 304, high-strength to the high-strength steel curved beam 1 of the first Q690 and the 2nd Q690 using optical fiber laser and welding robot
Steel curved beam 2 carries out second and welds, and detailed process is as follows:
Step 3041, under a shielding gas emits laser perpendicular projection to gap to be welded using optical fiber laser, uses
Welding robot installs welding wire in N1It is welded on a lower layer along gap length direction to be welded, obtains lower weldering in first
Road；
Step 3042, under a shielding gas emits laser perpendicular projection to gap to be welded using optical fiber laser, uses
Welding robot installs welding wire in N1It is welded on a lower layer along gap length direction to be welded, obtains lower weldering in second
Road forms lower layer in first；
Step 3043 repeats step 3041 and step 3042, is welded, is formed next time on lower layer in upper one
Lower layer in next, successively obtain lower layer in second ..., N2Lower layer in a, and N2The table of lower layer in a
The spacing on surface of the identity distance from first horizontal portion 1-1 and the second horizontal part 2-1 is 5mm；Wherein, N2For total layer of second of welding
Number, N2For positive integer, N2≥2；
It is step 305, high-strength to the high-strength steel curved beam 1 of the first Q690 and the 2nd Q690 using optical fiber laser and welding robot
Steel curved beam 2 carries out third time welding, and detailed process is as follows:
Step 3051, under a shielding gas emits laser perpendicular projection to gap to be welded using optical fiber laser, uses
Welding robot installs welding wire in N2It is welded on lower layer along gap length direction to be welded in a, obtains upper weldering in first
Road；
Step 3052, under a shielding gas emits laser perpendicular projection to gap to be welded using optical fiber laser, uses
Welding robot installs welding wire in N2It is welded on lower layer along gap length direction to be welded in a, obtains upper weldering in second
Road；
Step 3053, under a shielding gas emits laser perpendicular projection to gap to be welded using optical fiber laser, uses
Welding robot installs welding wire in N2It is welded on lower layer along gap length direction to be welded in a, obtains upper weldering in third
Road forms upper layer in first；
Step 3054 repeats step 3051 and step 3053, is welded, is formed next time on upper layer in upper one
Upper layer in next, successively obtain upper layer in second ..., N3Upper layer in a, and N3The table of upper layer in a
Identity distance is from N2The spacing on the surface of lower layer is 3mm in a；Wherein, N3For total number of plies of third time welding, N3For positive integer,
N3≥2；
It is step 306, high-strength to the high-strength steel curved beam 1 of the first Q690 and the 2nd Q690 using optical fiber laser and welding robot
Steel curved beam 2 carries out the 4th welding, and detailed process is as follows:
Step 3061, under a shielding gas emits laser perpendicular projection to gap to be welded using optical fiber laser, uses
Welding robot installs welding wire in N3It is welded on upper layer along gap length direction to be welded in a, obtains first upper weldering
Road；
Step 3062, under a shielding gas emits laser perpendicular projection to gap to be welded using optical fiber laser, uses
Welding robot installs welding wire in N3It is welded on upper layer along gap length direction to be welded in a, obtains second upper weldering
Road；
Step 3063, under a shielding gas emits laser perpendicular projection to gap to be welded using optical fiber laser, uses
Welding robot installs welding wire in N3It is welded on upper layer along gap length direction to be welded in a, obtains the upper weldering of third
Road；
Step 3064, under a shielding gas emits laser perpendicular projection to gap to be welded using optical fiber laser, uses
Welding robot installs welding wire in N3It is welded on upper layer along gap length direction to be welded in a, obtains the 4th upper weldering
Road forms first upper layer；
Step 3065 repeats step 3061 and step 3064, is welded next time on upper one upper layer, under formation
One upper layer, successively obtain second upper layer ..., N4A upper layer, until N4The surface and first of a upper layer
Right-angled trapezium portion 1-2 and the surface of the second right-angled trapezium portion 2-2 are flush, and complete the high-strength steel curved beam 1 and second of the first Q690
The welding of welding seam to be welded between the high-strength steel curved beam 2 of Q690, obtains Q690 high-strength steel weldment；Wherein, N4To weld for the third time
The total number of plies connect, N4For positive integer, N4≥2；
Step 4: the heat treatment after welding:
Q690 high-strength steel weldment is placed in incubator and is heat-treated；Wherein, the temperature of heat treatment is 500, at heat
The time of reason is 4h.
In the present embodiment, titanium dioxide that the argon gas and volume content that the protective gas is 80% by volume content are 20%
Carbon composition, the gas flow of the protective gas are 18L/min；
Spacing of the laser head of optical fiber laser apart from gap bottom to be welded is 106mm, and the power of optical fiber laser is
2500W, the wavelength that optical fiber laser emits laser is 1070nm, and the laser and welding wire of optical fiber laser transmitting are split close to be welded
Spacing between one end of seam is 3mm, laser and the welding wire shape between the one end in crack to be welded of optical fiber laser transmitting
At angle be 30 °；
When welding robot welds, weldingvoltage 20V, welding wire is close to the one end in crack to be welded and the mobile speed of laser
Degree is 60m/s, and the wire feed rate of welding robot is 6.7m/min.
In the present embodiment, the gage of wire of welding is 1.5mm, second of welding, third time welding and the 4th time for the first time
The gage of wire of welding is 1.0mm；
First lower layer in step 303, second lower layer ..., N1The thickness of a lower layer is 3mm；
Lower layer in first in step 304, lower layer in second ..., N2The thickness of lower layer is in a
2.5mm；
Upper layer in first in step 305, upper layer in second ..., N3The thickness of upper layer is in a
1.5mm；
First upper layer in step 306, second upper layer ..., N4The thickness of a upper layer is 1.5mm.
In the present embodiment, the cleaning of the high-strength steel curved beam blocks of Q690 in step 2, detailed process is as follows:
The high-strength steel curved beam 1 of first Q690 and the high-strength steel curved beam 2 of the 2nd Q690 are put into pure water, and use by step 201
Soft bristle tooth brush is scrubbed, and is then flushed three times with pure water；
Step 202 dips ethanol solution using glasses cloth, to the high-strength steel curved beam 1 and second of the first Q690 after flushing
The high-strength steel curved beam 2 of Q690 is cleaned；Wherein, cleaning the time is 10min.
In the present embodiment, width of the welding bead along crack to be welded under being descended in welding bead and second in first in step 304
Direction is laid, and the lap width of lower welding bead is 1mm in lower welding bead and second in first；
Upper welding bead in first in step 305, in second in upper welding bead and third upper welding bead along crack to be welded
Width direction is laid, the lap width in first in upper welding bead and second between upper welding bead with second in upper welding bead and the
Lap width in three between upper welding bead is 1mm；
First upper welding bead, second upper welding bead, the upper welding bead of third and the 4th upper welding bead are along to be welded in step 306
The width direction in crack is laid, lap width, second upper welding bead between first upper welding bead and second upper welding bead and the
The lap width between lap width and the upper welding bead of third and the 4th upper welding bead between three upper welding beads is 1mm.
In the present embodiment, the angle between the inclined-plane and vertical direction of first right-angled trapezium portion 1-2 is 15 °, described
Angle between the inclined-plane and vertical direction of second right-angled trapezium portion 2-2 is 15 °.
In the present embodiment, the temperature of the pre-heat treatment is 150 DEG C in step 302, and the time of the pre-heat treatment is 5min, the first water
Flat portion 1-1 and the second horizontal part 2-1 is first horizontal portion 1-1 and the second horizontal part 2-1 apart from seam to be welded to preheated zone
The minimum widith edge 100mm of gap.
In the present embodiment, during actual use, brushing time is 5min~10min, second in step 202 in step 201
The volumetric concentration of alcoholic solution is not less than 90%.
In the present embodiment, welding wire uses HS-80 high strength steel welding wire.
In the present embodiment, optical fiber laser and welding robot are high-strength to the high-strength steel curved beam 1 of the first Q690 and the 2nd Q690
Steel curved beam 2 carries out first time welding, second welding, third time welding and the 4th welding respectively, and first is to consider the
The change width in gap to be welded between the high-strength steel curved beam 1 of one Q690 and the high-strength steel curved beam 2 of the 2nd Q690, to be suitable for comparing
The thick high-strength steel curved beam of Q690；Second, it is to decrease the constraint stress of the high-strength steel curved beam of Q690 to reduce welding deformation；
Third, be in order to avoid gap to be welded is hotter between the high-strength steel curved beam 1 of the first Q690 and the high-strength steel curved beam 2 of the 2nd Q690, can
To reduce heat input heat, so that the heat affecting of weld seam is small, it is effectively guaranteed the high-strength steel curved beam 1 of the first Q690 and the 2nd Q690
The metallographic structure of high-strength 2 weld of steel curved beam；4th, it is in order to which next layer of weld seam welding can be carried out hot place to upper one layer of weld seam
Reason reduces the stress of upper one layer of weld seam, so as to improve the structure property of weld seam, to promote weldquality stability.
In the present embodiment, optical fiber laser and welding robot are high-strength to the high-strength steel curved beam 1 of the first Q690 and the 2nd Q690
Steel curved beam 2 carries out second welding respectively, third time welding and the 4th welding time-division multiple tracks are welded, first, be in order to
The defects of wlding is avoided to the deformation of the high-strength steel curved beam base material of Q690, is not likely to produce stomata；Second, latter welding bead is to previous welding bead
And its heat affected area is reheated, and so that heating zone tissue and performance is undergone phase transition recrystallization, is formed tiny equiax crystal, make to mould
Property and toughness are improved, and the moulding of weld seam is improved.
In the present embodiment, the angular range between the inclined-plane and vertical direction of the first right-angled trapezium portion 1-2 is 15 °~25 °
Between adjust, the angle between the inclined-plane and vertical direction of second right-angled trapezium portion 2-2 is to adjust between 15 °~25 ° of range
Section, first, it is the bevel angle in order to reduce gap to be welded, weld seam volume accordingly reduces, to save wlding；Second, be
It is close that with the high-strength steel curved beam base material of Q690 face contact is merged for the ease of wlding, it is ensured that the energy of heat source is concentrated, preferably to melt
Close base material；Third is in order to which the depth-to-width ratio for improving gap to be welded is big, and the welding wire amount of filling is greatly decreased, and makes processing efficiency
It significantly improves.
In the present embodiment, when being welded using optical fiber laser and welding robot, the molten drop of welding wire to molten bath i.e. to
The transition in welding gap is to act on completion, therefore welding process heat input by surface tension driving under no current state
It is small, without splashing.Compared with traditional-handwork electric arc welding, laser-MIG hybrid welding process heat input is small, weld seam and sweating heat shadow
Ring area's fine microstructures, therefore the available effective inhibition of the problems such as softening and toughness decline.
In the present embodiment, using optical fiber laser, be in order to be modulated by the laser power to optical fiber laser, can
The generation for the defects of further improving appearance of weld, effectively inhibiting stomata.In addition, laser power modulation is to molten bath, that is, seam to be welded
Gap has stirring action, is conducive to improve weld seam crystallization tissue.
In the present embodiment, the cleaning of the high-strength steel curved beam blocks of Q690 in step 2 is to cut to the high-strength steel curved beam blocks of Q690
The oxidizing slag of face is removed completely, and removes water, oil and rust.
Embodiment 2
In the present embodiment, unlike the first embodiment: the horizontal space of step 301 intermediate gap is 2.2mm, step 3043
In N2The spacing on the surface of the surface distance first horizontal portion 1-1 and the second horizontal part 2-1 of lower layer is 5.5mm, step in a
N in rapid 30543The surface distance N of upper layer in a2The spacing on the surface of lower layer is 4.5mm in a, in step 4 at heat
The temperature of reason is 525 DEG C, and the time of heat treatment is 3.5h；
The gas flow of the protective gas is 22L/min, and the laser head of optical fiber laser is apart from gap bottom to be welded
Spacing be 108mm, the power of optical fiber laser is 2900W, and the laser and welding wire of optical fiber laser transmitting are split close to be welded
Spacing between one end of seam is 3.2mm, and the laser and welding wire of optical fiber laser transmitting are between the one end in crack to be welded
The angle of formation is 35 °；When welding robot welds, weldingvoltage 22V, the one end and laser of welding wire close to crack to be welded
Movement speed be 62m/s, the wire feed rate of welding robot is 6.8m/min；The gage of wire of welding is for the first time
The gage of wire of 1.6mm, second of welding, third time welding and the 4th welding are 1.2mm；
First lower layer in step 303, second lower layer ..., N1The thickness of a lower layer is 3.3mm；Step
Lower layer in first in rapid 304, lower layer in second ..., N2The thickness of lower layer is 2.8mm in a；Step
Upper layer in first in 305, upper layer in second ..., N2The thickness of upper layer is 2.3mm in a；Step 306
In first upper layer, second upper layer ..., N4The thickness of a upper layer is 2mm；
It is 12min that the time is cleaned in step 202.
The lap width for descending lower welding bead in welding bead and second in step 304 in first is 1.1mm；In step 305
Lap width in one in upper welding bead and second between upper welding bead with second in upper welding bead and third upper welding bead it
Between lap width be 1.1mm；First lap width gone up between welding bead and second upper welding bead, second in step 306
The overlap joint between lap width and the upper welding bead of third and the 4th upper welding bead between a upper welding bead and the upper welding bead of third
Width is 1.1mm；Angle between the inclined-plane and vertical direction of first right-angled trapezium portion 1-2 is 22 °, states the second right angle
Angle between the inclined-plane and vertical direction of trapezoidal portion 2-2 is 22 °；
The temperature of the pre-heat treatment is 175 DEG C in step 302, and time of the pre-heat treatment is 3.5min, first horizontal portion 1-1 and
Second horizontal part 2-1 is that minimum of the first horizontal portion 1-1 and the second horizontal part 2-1 apart from gap to be welded is wide to preheated zone
Spend edge 105mm.
Other method processes in the present embodiment are same as Example 1.
Embodiment 3
In the present embodiment, unlike the first embodiment: the horizontal space of step 301 intermediate gap is 2.5mm, step 3043
In N2The spacing on the surface of the surface distance first horizontal portion 1-1 and the second horizontal part 2-1 of lower layer is 6mm, step in a
N in 30543The surface distance N of upper layer in a2The spacing on the surface of lower layer is 6mm in a, is heat-treated in step 4
Temperature is 550 DEG C, and the time of heat treatment is 3h；
The gas flow of the protective gas is 25L/min, and the laser head of optical fiber laser is apart from gap bottom to be welded
Spacing be 110mm, the power of optical fiber laser is 3300W, and the laser and welding wire of optical fiber laser transmitting are split close to be welded
Spacing between one end of seam is 3.5mm, and the laser and welding wire of optical fiber laser transmitting are between the one end in crack to be welded
The angle of formation is 40 °；When welding robot welds, weldingvoltage 25V, the one end and laser of welding wire close to crack to be welded
Movement speed be 65m/s, the wire feed rate of welding robot is 7m/min；The gage of wire of welding is 1.8mm for the first time,
The gage of wire of second of welding, third time welding and the 4th welding is 1.4mm；
First lower layer in step 303, second lower layer ..., N1The thickness of a lower layer is 3.5mm；Step
Lower layer in first in rapid 304, lower layer in second ..., N2The thickness of lower layer is 3mm in a；Step 305
In upper layer in first, upper layer in second ..., N2The thickness of upper layer is 3mm in a；First in step 306
A upper layer, second upper layer ..., N4The thickness of a upper layer is 2.5mm；
It is 14min that the time is cleaned in step 202.
The lap width for descending lower welding bead in welding bead and second in step 304 in first is 1.2mm；In step 305
Lap width in one in upper welding bead and second between upper welding bead with second in upper welding bead and third upper welding bead it
Between lap width be 1.2mm；First lap width gone up between welding bead and second upper welding bead, second in step 306
The overlap joint between lap width and the upper welding bead of third and the 4th upper welding bead between a upper welding bead and the upper welding bead of third
Width is 1.2mm；Angle between the inclined-plane and vertical direction of first right-angled trapezium portion 1-2 is 25 °, states the second right angle
Angle between the inclined-plane and vertical direction of trapezoidal portion 2-2 is 25 °；
The temperature of the pre-heat treatment is 200 DEG C in step 302, and time of the pre-heat treatment is 2min, first horizontal portion 1-1 and the
Two horizontal part 2-1 are the minimum widith of first horizontal portion 1-1 and the second horizontal part 2-1 apart from gap to be welded to preheated zone
Edge 110mm.
Other method processes in the present embodiment are same as Example 1.
The above is only presently preferred embodiments of the present invention, is not intended to limit the invention in any way, it is all according to the present invention
Technical spirit any simple modification to the above embodiments, change and equivalent structural changes, still fall within skill of the present invention
In the protection scope of art scheme.
Claims (7)
1. a kind of method of Laser-MIG Composite Welding, which is characterized in that method includes the following steps:
Step 1: the processing of the high-strength steel curved beam blocks of Q690:
Process the first high-strength steel curved beam of Q690 (1) and the 2nd high-strength steel curved beam of Q690 (2)；Wherein, the first high-strength steel curved beam of Q690
(1) include first horizontal portion (1-1) and with the first horizontal portion (1-1) integrally formed first right-angled trapezium portion (1-2), institute
The base length for stating the first right-angled trapezium portion (1-2) is less than the length of first horizontal portion (1-1)；The 2nd high-strength steel curved beam of Q690
(2) include the second horizontal part (2-1) and with second horizontal part (2-1) integrally formed second right-angled trapezium portion (2-2), institute
State the length of the base length less than the second horizontal part (2-1) in the second right-angled trapezium portion (2-2)；
Step 2: the cleaning of the high-strength steel curved beam blocks of Q690:
The first high-strength steel curved beam of Q690 (1) and the 2nd high-strength steel curved beam of Q690 (2) are cleaned；
Step 3: the welding of the high-strength steel curved beam blocks of Q690:
Step 301, by after cleaning the first high-strength steel curved beam of Q690 (1) and the 2nd high-strength steel curved beam of Q690 (2) be mounted on welding
On platform；Wherein, inclined-plane of the inclined-plane in the first right-angled trapezium portion (1-2) towards the second right-angled trapezium portion (2-2), first horizontal portion
Gap is set between (1-1) and the second horizontal part (2-1), and the horizontal space in gap is 2mm~2.5mm, first horizontal portion (1-
1) inclined-plane and the second right-angled trapezium portion (2- in the gap between the second horizontal part (2-1) and the first right-angled trapezium portion (1-2)
2) gap to be welded is formed between inclined-plane；
Step 302, in the first high-strength steel curved beam of Q690 (1) and the 2nd high-strength steel curved beam of Q690 (2) bottom, using flame gun along
The width direction of one horizontal part (1-1) and the second horizontal part (2-1) moves back and forth, so that flame gun is to first horizontal portion (1-1)
With the second horizontal part (2-1) to preheated zone progress the pre-heat treatment；
Step 303, using optical fiber laser and welding robot to the first high-strength steel curved beam of Q690 (1) and after the pre-heat treatment
The high-strength steel curved beam of two Q690 (2) carries out first time welding, and detailed process is as follows:
Step 3031, under a shielding gas, using optical fiber laser transmitting laser perpendicular projection to gap to be welded, using welding
Length direction of the robot installation welding wire along gap to be welded is treated welding gap and is once welded, and is formed under first and is welded
Layer；Wherein, the laser that optical fiber laser emits in welding process is located at the front of welding wire；
Step 3032, under a shielding gas, using optical fiber laser transmitting laser perpendicular projection to gap to be welded, using welding
Robot installation welding wire is welded next time on a upper lower layer, is formed next lower layer, is successively obtained second
Lower layer ..., N1A lower layer, and N1The surface of a lower layer and first horizontal portion (1-1) and the second horizontal part (2-1)
Surface be flush；Wherein, N1For total number of plies of first time welding, N1For positive integer, N1≥5；
Step 304, using optical fiber laser and welding robot to the first high-strength steel curved beam of Q690 (1) and the 2nd Q690 high-strength steel
Sample (2) carries out second and welds, and detailed process is as follows:
Step 3041, under a shielding gas, using optical fiber laser transmitting laser perpendicular projection to gap to be welded, using welding
Welding wire is installed in N by robot1It is welded on a lower layer along gap length direction to be welded, obtains lower welding bead in first；
Step 3042, under a shielding gas, using optical fiber laser transmitting laser perpendicular projection to gap to be welded, using welding
Welding wire is installed in N by robot1It is welded on a lower layer along gap length direction to be welded, obtains lower welding bead, shape in second
At layer lower in first；
Step 3043 repeats step 3041 and step 3042, is welded, is formed next next time on lower layer in upper one
Lower layer in a, successively obtain lower layer in second ..., N2Lower layer in a, and N2In a the surface of lower layer away from
It is 5mm~6mm from the spacing on first horizontal portion (1-1) and the surface of the second horizontal part (2-1)；Wherein, N2It is welded for second
Total number of plies, N2For positive integer, N2≥2；
Step 305, using optical fiber laser and welding robot to the first high-strength steel curved beam of Q690 (1) and the 2nd Q690 high-strength steel
Sample (2) carries out third time welding, and detailed process is as follows:
Step 3051, under a shielding gas, using optical fiber laser transmitting laser perpendicular projection to gap to be welded, using welding
Welding wire is installed in N by robot2It is welded on lower layer along gap length direction to be welded in a, obtains upper welding bead in first；
Step 3052, under a shielding gas, using optical fiber laser transmitting laser perpendicular projection to gap to be welded, using welding
Welding wire is installed in N by robot2It is welded on lower layer along gap length direction to be welded in a, obtains upper welding bead in second；
Step 3053, under a shielding gas, using optical fiber laser transmitting laser perpendicular projection to gap to be welded, using welding
Welding wire is installed in N by robot2It is welded on lower layer along gap length direction to be welded in a, obtains upper welding bead in third,
Form upper layer in first；
Step 3054 repeats step 3051 and step 3053, is welded, is formed next next time on upper layer in upper one
Upper layer in a, successively obtain upper layer in second ..., N3Upper layer in a, and N3In a the surface of upper layer away from
From N2The spacing on the surface of lower layer is 3mm~6mm in a；Wherein, N3For total number of plies of third time welding, N3For positive integer,
N3≥2；
Step 306, using optical fiber laser and welding robot to the first high-strength steel curved beam of Q690 (1) and the 2nd Q690 high-strength steel
Sample (2) carries out the 4th welding, and detailed process is as follows:
Step 3061, under a shielding gas, using optical fiber laser transmitting laser perpendicular projection to gap to be welded, using welding
Welding wire is installed in N by robot3It is welded on upper layer along gap length direction to be welded in a, obtains first upper welding bead；
Step 3062, under a shielding gas, using optical fiber laser transmitting laser perpendicular projection to gap to be welded, using welding
Welding wire is installed in N by robot3It is welded on upper layer along gap length direction to be welded in a, obtains second upper welding bead；
Step 3063, under a shielding gas, using optical fiber laser transmitting laser perpendicular projection to gap to be welded, using welding
Welding wire is installed in N by robot3It is welded on upper layer along gap length direction to be welded in a, obtains the upper welding bead of third；
Step 3064, under a shielding gas, using optical fiber laser transmitting laser perpendicular projection to gap to be welded, using welding
Welding wire is installed in N by robot3It is welded on upper layer along gap length direction to be welded in a, obtains the 4th upper welding bead, shape
At first upper layer；
Step 3065 repeats step 3061 and step 3064, is welded, is formed next next time on upper one upper layer
Upper layer, successively obtain second upper layer ..., N4A upper layer, until N4The surface and the first right angle of a upper layer
Trapezoidal portion (1-2) and the surface in the second right-angled trapezium portion (2-2) are flush, and complete the first high-strength steel curved beam of Q690 (1) and second
The welding of welding seam to be welded between the high-strength steel curved beam of Q690 (2) obtains Q690 high-strength steel weldment；Wherein, N4For third time
Total number of plies of welding, N4For positive integer, N4≥2；
Step 4: the heat treatment after welding:
Q690 high-strength steel weldment is placed in incubator and is heat-treated；Wherein, the temperature of heat treatment is 500~550 DEG C, heat
The time of processing is 3h~4h.
2. a kind of method of Laser-MIG Composite Welding described in accordance with the claim 1, it is characterised in that: the protective gas by
The carbon dioxide composition that the argon gas and volume content that volume content is 80% are 20%, the gas flow of the protective gas are
18L/min~25L/min；
Spacing of the laser head of optical fiber laser apart from gap bottom to be welded is 106mm~110mm, the power of optical fiber laser
For 2500W~3300W, the wavelength that optical fiber laser emits laser is 1070nm, and the laser of optical fiber laser transmitting is leaned on welding wire
Spacing between the one end in nearly crack to be welded is 3mm~3.5mm, and the laser and welding wire of optical fiber laser transmitting are close to be welded
The angle formed between the one end in crack is 30 °~40 °；
When welding robot welds, weldingvoltage is 20V~25V, and welding wire is close to the one end in crack to be welded and the movement of laser
Speed is 60m/s~65m/s, and the wire feed rate of welding robot is 6.7m/min~7m/min.
3. a kind of method of Laser-MIG Composite Welding described in accordance with the claim 1, it is characterised in that: the weldering of welding for the first time
Silk diameter is 1.5mm~1.8mm, the gage of wire of second welding, third time welding and the 4th welding be 1.0mm~
1.4mm；
First lower layer in step 303, second lower layer ..., N1The thickness of a lower layer is 3mm~3.5mm；
Lower layer in first in step 304, lower layer in second ..., N2In a the thickness of lower layer be 2.5mm~
3mm；
Upper layer in first in step 305, upper layer in second ..., N3In a the thickness of upper layer be 1.5mm~
3mm；
First upper layer in step 306, second upper layer ..., N4The thickness of a upper layer is 1.5mm~2.5mm.
4. a kind of method of Laser-MIG Composite Welding described in accordance with the claim 1, it is characterised in that: Q690 high in step 2
The cleaning of strong steel curved beam blocks, detailed process is as follows:
The first high-strength steel curved beam of Q690 (1) and the 2nd high-strength steel curved beam of Q690 (2) are put into pure water, and use by step 201
Soft bristle tooth brush is scrubbed, and is then flushed three times with pure water；
Step 202 dips ethanol solution using glasses cloth, to the first high-strength steel curved beam of Q690 (1) and the 2nd Q690 after flushing
High-strength steel curved beam (2) is cleaned；Wherein, cleaning the time is 10min~14min.
5. a kind of method of Laser-MIG Composite Welding described in accordance with the claim 1, it is characterised in that: first in step 304
Width direction of the lower welding bead along crack to be welded is laid in lower welding bead and second in a, in first in lower welding bead and second
The lap width of lower welding bead is 1mm~1.2mm；
Upper welding bead in first in step 305, width of the upper welding bead along crack to be welded in upper welding bead and third in second
Direction is laid, the lap width in first in upper welding bead and second between upper welding bead with second in upper welding bead and third
In lap width between upper welding bead be 1mm~1.2mm；
First upper welding bead, second upper welding bead, the upper welding bead of third and the 4th upper welding bead are along crack to be welded in step 306
Width direction lay, lap width, second upper welding bead and third between first upper welding bead and second upper welding bead
Lap width between lap width and third between upper welding bead upper welding bead and the 4th upper welding bead be 1mm~
1.2mm。
6. a kind of method of Laser-MIG Composite Welding described in accordance with the claim 1, it is characterised in that: the first right angle ladder
Angle between the inclined-plane and vertical direction in shape portion (1-2) is 15 °~25 °, the inclined-plane in second right-angled trapezium portion (2-2) with
Angle between vertical direction is 15 °~25 °.
7. a kind of method of Laser-MIG Composite Welding described in accordance with the claim 1, it is characterised in that: preheated in step 302
The temperature of processing is 150 DEG C~200 DEG C, and the time of the pre-heat treatment is 2min~5min, first horizontal portion (1-1) and the second level
Portion (2-1) is the minimum widith of first horizontal portion (1-1) and the second horizontal part (2-1) apart from gap to be welded to preheated zone
Edge 100mm~110mm.
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