CN109175694A - A kind of online high-rate laser welding system of dynamic battery box dynamic and its working method - Google Patents
A kind of online high-rate laser welding system of dynamic battery box dynamic and its working method Download PDFInfo
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- CN109175694A CN109175694A CN201811212513.3A CN201811212513A CN109175694A CN 109175694 A CN109175694 A CN 109175694A CN 201811212513 A CN201811212513 A CN 201811212513A CN 109175694 A CN109175694 A CN 109175694A
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- 238000003466 welding Methods 0.000 title claims abstract description 79
- 238000000034 method Methods 0.000 title claims abstract description 26
- 230000033001 locomotion Effects 0.000 claims abstract description 32
- 230000005540 biological transmission Effects 0.000 claims abstract description 29
- 238000012937 correction Methods 0.000 claims abstract description 25
- 238000006073 displacement reaction Methods 0.000 claims abstract description 14
- 210000001367 artery Anatomy 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 210000003462 vein Anatomy 0.000 claims description 4
- 230000010355 oscillation Effects 0.000 claims description 2
- 238000012790 confirmation Methods 0.000 abstract description 3
- 230000003068 static effect Effects 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000004080 punching Methods 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 1
- 238000009795 derivation Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 230000005622 photoelectricity Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
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Classifications
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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
- B23K26/20—Bonding
- B23K26/21—Bonding by welding
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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
- B23K26/08—Devices involving relative movement between laser beam and workpiece
- B23K26/082—Scanning systems, i.e. devices involving movement of the laser beam relative to the laser head
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- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Laser Beam Processing (AREA)
- Sealing Battery Cases Or Jackets (AREA)
Abstract
The present invention provides a kind of online high-rate laser welding system of dynamic battery box dynamic and its working method, the welding system includes mirror-vibrating laser scanning welding system, control system and transmission line, according to the offset deviation of the real-time movement speed confirmation battery case top cover relative laser light beam of dynamic battery box, and galvanometer when realizing that difference counts in welding process by the coded pulse counter incrementing variation of battery box displacement coordinate offer offset and encoder deflects, to be corrected to the offset deviation.The present invention obtains the compensation rate of dynamic battery box displacement coordinate using the online real-time correction method of dynamic, to correct dynamic battery box movement bring light beam welding track distortion.
Description
Technical field
The present invention relates to technical field of laser welding, in particular to a kind of online high-rate laser welding of dynamic battery box dynamic
System and its working method.
Background technique
Dynamic battery box vibration mirror scanning type laser welding is to be moved using vibration mirror scanning microscope group to dynamic battery box top cover
One technology of state welding is passed different from generally using mechanical device that probe is driven to move back and forth completion scanning in the plane
The mechanical scan precision of system is low, inertia is big, response speed is slow, and the x of the reciprocal servo motor drive of scanning galvanometer use high speed,
Two vibration mirror scanning heads of y issue command signal to the servo motor of two axis by the servo-system of two axis of x, y, drive two axis of x, y
Scanning galvanometer make deflection along x-axis and y-axis respectively, by the cooperative movement of two axis galvanometers, make that there is certain power density
Laser spot is quickly moved by necessary requirement in dynamic battery box top cover plane and according to the profile of figure to be scanned, and formation is swept
Track is retouched, laser scanning galvanometer system has the advantages that precision is high, inertia is small, fast response time.This kind of laser galvanometer scanning system
System is widely used in the field of laser processing such as laser imaging, marking, punching, engraving, quenching, cutting, welding.
In most of industrial lasers welding applications, average weld interval relative to load and configuration whole system when
Between, accounting very little, most of weld interval only accounts between the 20%-50% in an operation cycle, and other time is used for galvanometer weight
New definition is fixed with battery case top cover.And vibration mirror scanning laser welding technology is used, will greatly reduce galvanometer relocates the time,
Weld interval accounting can increase to 70% or more, can arbitrary point quick, in accurate welding scanning range, than traditional welding speed
Degree can be improved 5 times or more.Specifically, vibration mirror scanning laser welding technology has relative to traditional laser welding technology
Following advantages: (1) locating speed is fast, greatly shortens process time, improves efficiency；(2) it adopts and computerizeds control, positioning accuracy
Height, welding precision are greatly enhanced；(3) laser welding apparatus and top cover distance are remote, do not contact directly, weld with dynamic battery box
Range is connect obviously to become larger；(4) accessibility is good, welds to inaccessible dynamic battery box top cover position.
However, a disadvantage of above-mentioned vibration mirror scanning type laser welding system is exactly the laser light when carrying out laser welding
Beam in top cover surface high-speed mobile, and at this time battery case top cover must position it is fixed to be accurately positioned, otherwise can cause to weld
Connect fault or failure.
In consideration of it, the present invention provides the new online high-rate laser welding system of dynamic battery box dynamic of one kind and its work side
Method, to overcome above-mentioned subproblem.
Summary of the invention
The object of the present invention is to provide a kind of online high-rate laser welding systems of the dynamic battery box that welding precision is high dynamic
And its working method.
To achieve the above object, one technical scheme adopted by the invention is that: a kind of online high speed of dynamic battery box dynamic
Laser welding system comprising mirror-vibrating laser scans welding system, control system and transmission line, the mirror-vibrating laser scanning
Welding system includes laser source, scanning laser head, and the control system includes scan control card, dynamic Laser welding card and transmission
Line motion control card, photoelectric encoder is coupled on the transmission line, and the pulse signal of the photoelectric encoder output is transferred to institute
Dynamic Laser welding card is stated, and the dynamic Laser Clamp for welding there are multiple interfaces, pulse signal synchronized by an interface and transmitted
To the scan control card, pulse signal is transferred to the transmission line motion control card, the scan control through another interface
Card has all multiple interfaces, wherein several interfaces of the scan control card are connected with the laser source, the scan control card
Other several interfaces be connected with the scanning laser head and issue synchronization signal and clock signal.
Galvanometer deflection galvanometer is fixed in the scanning laser head, the galvanometer deflection galvanometer includes that x-axis is inclined
Rotational oscillation mirror and y-axis deflect galvanometer, and are driven respectively by x-axis actuating motor and y-axis actuating motor.
The x-axis actuating motor, y-axis actuating motor are all made of galvanometer finite angle motor, and deflection angle control exists
Within ± 20 °.
A kind of working method of the online high-rate laser welding system of dynamic battery box dynamic comprising: photoelectric encoder is defeated
Pulse out, transmission line drive dynamic battery box to move in the x-direction；Arteries and veins is inputted to photoelectric encoder by transmission line motion control card
Capable counting is rushed in, mobile dynamic battery box top cover is welded by scanning laser head；It is moved in real time according to dynamic battery box
The offset deviation of dynamic speed confirmation battery case top cover relative laser light beam, and offset and volume are provided by battery box displacement coordinate
Galvanometer deflection when different countings in welding process is realized in the coded pulse counter incrementing variation of code device, thus inclined to the displacement
Difference is corrected.
Further, the correction amount of the offset deviation: σx=kx·Δix(Vst·Δtx), wherein kxFor dynamic battery box
The compensating proportion factor of displacement coordinate, unit are bit/pulse；ΔixFor the coding of the encoder in transmission line motion control card
Step-by-step counting increment, unit are pulse/millimeter；ΔtxFor correction time interval；VstIt is moved horizontally for dynamic battery box x-axis direction
Speed.
Further, K=kx·Δix, wherein K is correction factor, and by inputting correction factor K, photoelectric encoder output is mended
It repays signal and is transferred to scan control card through dynamic Laser welding junction；X-axis deflection in scan control card control scanning laser head
Galvanometer deflection.
Compared with prior art, a kind of online high-rate laser welding system of dynamic battery box dynamic of the present invention and its work side
Method the utility model has the advantages that solving the problems, such as that high beat produces high-rate laser welding system online using cooperative control system, simultaneously
It is adapted to the continuous productive process of production line very well, reaches laser beam and dynamic battery box top cover can under mobile dynamic condition
Carry out accurate laser welding operation；When dynamic battery box moves along the x-axis direction, will be deformed, by laser beam
Deformation in battery case workpiece surface scanning track is modified, and the deflection galvanometer in the direction x is turned an angle dynamic to make up
Welding track caused by power battery case moves deforms, and using the online real-time correction method of dynamic, obtains dynamic battery box displacement
The compensation rate of coordinate, to correct dynamic battery box movement bring light beam welding track distortion.
Detailed description of the invention
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for
For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings other
Attached drawing, in which:
Fig. 1 is a kind of online high-rate laser welding structure figure of dynamic battery box dynamic of the present invention；
Fig. 2 is a kind of online high-rate laser welding system structure chart of dynamic battery box dynamic of the present invention；
Fig. 3 is a kind of online high-rate laser welding system cooperative control interface connection figure of dynamic battery box dynamic of the present invention；
Fig. 4 is dynamic battery box motion profile and laser beam scanning welding track coordinate and correction principle schematic diagram.
Specific embodiment
In order to make the foregoing objectives, features and advantages of the present invention clearer and more comprehensible.With reference to the accompanying drawing to the present invention
Specific embodiment elaborate.Many details are explained in the following description in order to fully understand this hair
It is bright.
Please refer to Fig. 1 to Fig. 3, the online high-rate laser welding system of a kind of dynamic battery box dynamic of the invention, including vibration
Mirror laser scanning welding system 1 is transmitted positioned at the transmission line 2 of 1 lower section of mirror-vibrating laser scanning welding system and for issuing
The instruction of line 2 and the control system 3 for controlling mirror-vibrating laser scanning 1 operation of welding system.
Referring to 1, Fig. 2, mirror-vibrating laser scanning welding system 1 includes laser source, scanning laser head, is fixed on scanning laser
The actuating motor of galvanometer deflection galvanometer, driving galvanometer deflection galvanometer rotation in head is set in scanning laser head
Focusing system and signal receiver.Focusing system uses F-theta lens focus mode, and the light that laser source issues is via F-
Theta lens focus is penetrated by scanning laser hair form laser beam 11 again.Galvanometer deflection galvanometer includes x-axis deflection galvanometer
Galvanometer is deflected with y-axis, and is driven respectively by x-axis actuating motor and y-axis actuating motor.X-axis actuating motor and y-axis actuating motor drive
Dynamic to be all made of galvanometer finite angle motor, deflection angle controls within ± 20 °.Deflection eyeglass is fixed on actuating motor
In shaft, the deflection for driving the deflection of reflecting mirror to realize laser beam is rotated by actuating motor.It can after laser beam focusing
The vector that any direction, size are scanned in working face realizes the welding of scan-type.
Referring to Fig. 1, Fig. 2, the x-axis transmission line that workpiece 21 to be welded is fixed on transmission line 2 and drives workpiece 21 to be welded mobile is driven
Dynamic motor 22, the workpiece to be welded 21 of the present embodiment are dynamic battery box.Also fixed photoelectric encoder and motor driven on transmission line 2
On the one hand device, photoelectric encoder output pulse signal cause x-axis transmission line driving motor 22 that dynamic battery box is driven to move along x-axis
Dynamic, another aspect pulsed signal modulator is transferred to control system 3
Referring to fig. 2, Fig. 3, control system 3 include scan control card, dynamic Laser welding card, transmission line motion control card.
Wherein, scan control card control actuating motor drives mirror deflection, and realizes the luminous on-off of laser source；Scan control card will
The movement of both laser scanning welding head and photoelectric encoder of transmission line 2 cooperate with, formation cooperative control system, and by dynamic Laser
Welding blocks obtained dynamic battery box displacement signal and is sent to scan control card；Transmission line motion control card records photoelectric encoder arteries and veins
Number is rushed, and controls the movement velocity of dynamic battery box.
It is specific as follows the following detailed description of above-mentioned cooperative control system:
Referring to fig. 2, Fig. 3, the scan control fixture of control system 3 is for all multiplex roles, and wherein the four of laser controlling card connect
Mouth is connected with laser source, realizes laser output power control, laser modulation signal output, the transmitting of laser start-up and shut-down control signal respectively
And ground connection.The pulse pulsed signal modulator of photoelectric encoder output is transferred to dynamic Laser welding card interface, dynamic Laser
Pulse signal is further transferred to scan control card by welding card, and four interfaces of scan control card are connected with scanning laser head,
It realizes the control to scanning laser head, issues synchronization signal and clock signal, it is ensured that scanning laser head is cooperateed with photoelectric encoder
Laser beam and dynamic battery box top cover cooperative motion are realized in movement, real-time according to dynamic battery box on measurement gained production line
Movement speed carries out offset deviation calculating to battery case top cover, and the input that dynamic Laser welding card interface is used as dynamic calibration connects
Mouthful, realize that dynamic battery box in the displacement correction of x-axis direction, can be correctly completed accurate laser welding operation.In addition, welding
Software is connected to control system 3 by pci interface.
The cooperative control system solves the problems, such as high-rate laser speed of welding and high productive temp, while being adapted to very well
The continuous productive process of production line, reaching laser beam and dynamic battery box top cover can carry out accurately under mobile dynamic condition
Laser welding operation.If the track that laser beam 11 moves is the vertical line vertical with x-axis direction, i.e., in the y-axis direction, then power
When battery case top cover is static, the deflection galvanometer in the direction y need to be only controlled, certain angle is deflected, weldering can be scanned in the direction y
It connects.When dynamic battery box moves along the x-axis direction, moves if carrying out laser beam 11 according to static position, just will be deformed,
The movement velocity of especially dynamic battery box is very fast and when 11 scanning motion speed of laser beam is not relatively high, deform extremely bright
It is aobvious.Therefore, it is necessary to be modified to this deformation, the deflection galvanometer 1 in the direction x is turned an angle to make up dynamic battery box fortune
It is deformed caused by dynamic, and using the online real-time correction method of dynamic.
Deformation is modified to realize, the work side of the online high-rate laser welding system of dynamic battery box dynamic of the present invention
Method is as follows:
Photoelectric encoder exports pulse, and transmission line drives dynamic battery box to move in the x-direction；Pass through transmission line motion control
Card counts photoelectric encoder input pulse, is welded by scanning laser head to mobile dynamic battery box top cover；
According to the offset deviation of the real-time movement speed confirmation battery case top cover relative laser light beam of dynamic battery box, and pass through battery case position
Move galvanometer when difference counts in the coded pulse counter incrementing variation realization welding process of coordinate offer offset and encoder
Deflection, to be corrected to the offset deviation.
The correction amount of the offset deviation: σx=kx·Δix(Vst·Δtx), wherein kxIt is displaced and sits for dynamic battery box
Target compensating proportion factor, unit are bit/pulse；ΔixFor the coded pulse meter of the encoder in transmission line motion control card
Number increment, unit are pulse/millimeter；ΔtxFor correction time interval；VstFor dynamic battery box x-axis direction horizontal movement velocity.
And K=kx·Δix, wherein K is correction factor, and by inputting correction factor K, photoelectric encoder exports thermal compensation signal through laser
Dynamic welding junction is transferred to scan control card；X-axis deflection galvanometer deflection in scan control card control scanning laser head comes more
It mends and is deformed caused by dynamic battery box movement, and using the online real-time correction method of dynamic.
The detailed derivation process of the online real-time correction method of the dynamic of use is as follows:
Referring to fig. 4, it is assumed that photoelectric encoder exports pulse, and transmission line drives dynamic battery box to move in the x-direction, when welding
Between be spaced in t, laser beam under this dynamic case scanning path of welding track is Ssc, then Vsc=Δ Ssc/Δt；SfTo pass
Laser beam is scanned the path locus of welding when the static battery case of defeated line 2 is fixed.When dynamic battery box moves along the x-axis direction
When, it moves if carrying out laser beam 11 according to static position, just will be deformed.Therefore, dynamic battery box x-axis direction water is set
Translate dynamic path locus SstFor displacement correction value, while SstIt also is the offset deviation of dynamic battery box top cover relative laser light beam,Revised laser beam scans the path locus of welding online when moving in X direction for transmission line drive battery case, existsEnable Vf=Δ Sf/ Δ t, Vst=Δ Sst/ Δ t, then Vf=Vst+Vsc。
Then, the displacement correction value S moved horizontally according to dynamic battery box x-axis directionstAnd speed Vst, set power electric
The compensating proportion factor k of pond box displacement coordinatex, indicate a displacement counted in pulse in image field, unit is bit/arteries and veins
Punching.One pulse of every output of the encoder of different model, the coded pulse counter incrementing Δ i of the encoder in motion control cardx
Difference, Δ ixUnit is pulse/millimeter, indicates the difference of counter final value and initial value and the ratio of the direction x transmission range, finally
Offset deviation correction amount: σx=kx·Δix(Vst·Δtx), Δ txFor correction time interval.Set kx·Δix=K, then σx=
K(Vst·Δtx), wherein K is correction factor, Δ txIt can be set as 10 μ s.Correction factor K, photoelectricity are inputted finally by welding control software
Encoder output thermal compensation signal is transferred to scan control card through dynamic Laser welding junction；Scan control card control scanning laser head
Interior x-axis deflection galvanometer deflection, completes accurate laser welding operation.
Certainly, those skilled in the art in the art are it should be appreciated that above-described embodiment is intended merely to illustrate this hair
It is bright, and be not used as limitation of the invention, if in spirit of the invention, to the variation of above-described embodiment,
Modification will all be fallen within the scope of the claims.
Claims (6)
1. a kind of online high-rate laser welding system of dynamic battery box dynamic comprising mirror-vibrating laser scans welding system, control
System processed and transmission line, the mirror-vibrating laser scanning welding system includes laser source, scanning laser head, it is characterised in that: institute
Stating control system includes scan control card, dynamic Laser welding card and transmission line motion control card, couples light on the transmission line
Photoelectric coder, the pulse signal of the photoelectric encoder output are transferred to the dynamic Laser welding card, the dynamic Laser weldering
Card is connect with multiple interfaces, pulse signal is synchronously transmitted to by the scan control card by an interface, through another interface by arteries and veins
It rushes signal and is transferred to the transmission line motion control card, the scan control card has all multiple interfaces, wherein the scanning is controlled
Several interfaces of fabrication are connected with the laser source, other several interfaces and the scanning laser head phase of the scan control card
Connect and issues synchronization signal and clock signal.
2. a kind of online high-rate laser welding system of dynamic battery box dynamic as described in claim 1, it is characterised in that: described
Galvanometer deflection galvanometer is fixed in scanning laser head, the galvanometer deflection galvanometer includes that x-axis deflection galvanometer and y-axis are inclined
Rotational oscillation mirror, and driven respectively by x-axis actuating motor and y-axis actuating motor.
3. a kind of online high-rate laser welding system of dynamic battery box dynamic as claimed in claim 2, it is characterised in that: described
X-axis actuating motor, y-axis actuating motor are all made of galvanometer finite angle motor, and deflection angle controls within ± 20 °.
4. a kind of working method of the online high-rate laser welding system of dynamic battery box dynamic comprising appoint in claims 1 to 3
The laser welding system of meaning one, it is characterised in that: photoelectric encoder exports pulse, and transmission line drives dynamic battery box along the side x
To movement；Photoelectric encoder input pulse is counted by transmission line motion control card, by scanning laser head to movement
Dynamic battery box top cover welded；Battery case top cover relative laser light beam is confirmed according to the real-time movement speed of dynamic battery box
Offset deviation, and weldering is realized by the coded pulse counter incrementing variation that battery box displacement coordinate provides offset and encoder
Galvanometer deflection in termination process when different countings, to be corrected to the offset deviation.
5. the working method of the online high-rate laser welding system of dynamic battery box dynamic as claimed in claim 4, feature exist
In: the correction amount of the offset deviation: σx=kx·Δix(Vst·Δtx), wherein kxFor the benefit of dynamic battery box displacement coordinate
Proportionality factor is repaid, unit is bit/pulse；ΔixIncreasing is counted for the coded pulse of the encoder in transmission line motion control card
Amount, unit are pulse/millimeter；ΔtxFor correction time interval；VstFor dynamic battery box x-axis direction horizontal movement velocity.
6. the working method of the online high-rate laser welding system of dynamic battery box dynamic as claimed in claim 5, feature exist
In: K=kx·Δix, wherein K is correction factor, and by inputting correction factor K, photoelectric encoder exports thermal compensation signal through laser
Dynamic welding junction is transferred to scan control card；X-axis deflection galvanometer deflection in scan control card control scanning laser head.
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| CN117644290A (en) * | 2024-01-29 | 2024-03-05 | 宁波吉宁汽车零部件有限公司 | High-strength steel laser flying welding process and welding system |
| WO2024198895A1 (en) * | 2023-03-24 | 2024-10-03 | 无锡先导智能装备股份有限公司 | Laser welding method and apparatus, control device, and storage medium |
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