CN108098140A - A kind of method for laser welding of automobile power cell aluminum alloy casing - Google Patents
A kind of method for laser welding of automobile power cell aluminum alloy casing Download PDFInfo
- Publication number
- CN108098140A CN108098140A CN201711156802.1A CN201711156802A CN108098140A CN 108098140 A CN108098140 A CN 108098140A CN 201711156802 A CN201711156802 A CN 201711156802A CN 108098140 A CN108098140 A CN 108098140A
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- Prior art keywords
- laser welding
- aluminum alloy
- automobile power
- power cell
- positioning
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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
-
- 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
-
- 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
- B23K26/70—Auxiliary operations or equipment
- B23K26/702—Auxiliary equipment
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- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Laser Beam Processing (AREA)
Abstract
The invention discloses a kind of method for laser welding of automobile power cell aluminum alloy casing, including galvanometer, smart camera, seam, controller, module end plate, module side plate and following steps：Step 1, the selection of battery modules shell and first positioning；Step 2, detection and secondary positioning before industrial vision weldering；Step 3, robot carries galvanometer and carries out laser welding, the method for laser welding of this kind of automobile power cell aluminum alloy casing, operating procedure is simple, highly practical, positioning accuracy is high, optimization laser welding process parameter, it ensure that Weld Performance is good, beautiful appearance, zero defect, meet customer need, provide a great help for people.
Description
Technical field
The present invention relates to a kind of materials processing technology field, more particularly, to a kind of automobile power cell aluminum alloy casing
Method for laser welding.
Background technology
With the fast development of new energy technology, power battery obtains unprecedented development trend in automotive field.
In terms of laser welding is applied primarily to the welding of automobile power battery enclosure, with heat affected area is narrow, welding deformation is small, weld seam
Depth-to-width ratio is big, welding position is flexible and it is easy to automate the advantages that.
At present, pure laser welding manner is mainly to be welded by the track that frock clamp determines before weldering.Due to weldering
The factors such as preceding battery modules frock clamp positioning accuracy is not high and laser welding process parameter selection is unreasonable, cause laser
The mass defects problems such as being partially welded easily occurs in welding postwelding, stomata, arc crater.
As requirement of the people to the postwelding forming quality of automobile power battery enclosure is continuously improved, pure laser welding side
Formula is difficult to meet the needs of battery production enterprise is to product quality instantly.And industrial vision has non-contact, positioning accuracy high and
The advantages that flexibility degree of production is high.Using industrial vision to weld seam precise positioning and the side of optimization laser welding process parameter
Method can reach and the postwelding weldquality of automobile power battery enclosure is significantly improved.
The content of the invention
The technical problem to be solved by the present invention is to overcome the existing defects, provides a kind of automobile power cell aluminum alloy casing
Method for laser welding, so as to solve the above problems.
To achieve the above object, the present invention provides following technical solution：A kind of automobile power cell aluminum alloy casing swashs
Photocoagulation method, including galvanometer, smart camera, seam, controller, module end plate, module side plate and following steps：
Step 1, the selection of battery modules shell and first positioning；
Step 2, detection and secondary positioning before industrial vision weldering；
Step 3, robot carry galvanometer and carry out laser welding.
As a preferred technical solution of the present invention, positioning for the first time is to detect gas using magnetic switch in the step 1
The state of cylinder simultaneously feeds back to controller, and the controller control cylinder positions battery modules for the first time, ensures battery modules
End plate and module side plate butt-joint clearance are less than 0.1mm, and flatness is less than 0.1mm.
As a preferred technical solution of the present invention, detection and secondary positioning are before industrial vision weldering in the step 2
Detection and automatic identification positioning before finger welds the seam of battery modules end plate and module side plate, the purpose is to position for the first time
Afterwards, gaping of joints amount is detected with flatness whether in permitted scope, it is then determined that galvanometer is specifically welded compared with seam
Connect position.
As a preferred technical solution of the present invention, the light type of the smart camera is blueness, and focal length is
72mm~108mm.
As a preferred technical solution of the present invention, robot carries galvanometer and carries out laser welding in the step 3,
The technological parameter of welding is：100 μm of fibre diameter；Spot diameter 0.595mm；Focus lamp focal length 460mm；Laser welding power
P5000w~6000w；Speed of welding 40mm/s~70mm/s；Defocusing amount -2mm~2mm；Swing mode：Sinusoidal form, frequency
Rate 80Hz~120Hz, amplitude 0.7mm~1.2mm；Welding process is protected using purity 99.9999%Ar, Ar flows 20L/min
~30L/min.
As a preferred technical solution of the present invention, the laser welding power P from distance receive at arc position 1mm to away from
From fading to 0.9P at 0.5mm, from away from receiving at arc position 0.5mm to fading to 0.7P at distance 0.3mm, from away from receiving arc position
0.3mm fades to 0.5P to place is terminated, and the method effectively avoids receiving generation arc crater phenomenon at arc.
Compared with prior art, the beneficial effects of the invention are as follows：The Laser Welding of this kind of automobile power cell aluminum alloy casing
Method is connect, operating procedure is simple, highly practical, and positioning accuracy is high, optimization laser welding process parameter, ensure that Weld Performance is good
Good, beautiful appearance, zero defect, meet customer need, provide a great help for people.
Description of the drawings
Attached drawing is used for providing a further understanding of the present invention, and a part for constitution instruction, the reality with the present invention
Example is applied together for explaining the present invention, is not construed as limiting the invention.In the accompanying drawings：
Fig. 1 is a kind of method for laser welding vision-based detection schematic diagram of automobile power cell aluminum alloy casing of the present invention；
Fig. 2 is a kind of method for laser welding laser welding schematic diagram of automobile power cell aluminum alloy casing of the present invention；
Fig. 3 is a kind of method for laser welding flow chart of automobile power cell aluminum alloy casing of the present invention；
In figure：1st, galvanometer；2nd, smart camera；3rd, seam；4th, controller；5th, module end plate；6th, module side plate.
Specific embodiment
Below in conjunction with the attached drawing in the embodiment of the present invention, the technical solution in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, instead of all the embodiments, is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other without making creative work
Embodiment belongs to the scope of protection of the invention.
Embodiment 1, comprises the following steps：
Step 1, the selection of battery modules shell and first positioning；
Step 2, robot carry galvanometer and carry out laser welding.
Step 1, the selection of battery modules shell and first positioning, this clamping process detect cylinder using magnetic switch
State, feeds back to controller 4, and controller 4 controls cylinder to be clamped action to corresponding site, corresponding site refer to battery mould
Group end plate 5 arrives separately at the precalculated position of frock clamp, battery modules end plate 5 used with module side plate 6：Material is that aluminium closes for 3
Gold, size are 149.3mm × 16.7mm × 94.7mm；Module side plate 6：Material be 3 line aluminium alloys, size for 515.2mm ×
3.0mm × 105.4mm, wherein, battery modules end plate 5 and 6 butt-joint clearance of module side plate are less than 0.1mm, and flatness is less than
0.1mm。
Step 2, robot carry galvanometer and carry out laser welding, this laser welding uses Yb：YAG solid state lasers are to electricity
The seam 3 of pond module end plate 5 and module side plate 6 carries out laser welding, and laser welding uses Yb：YAG solid state lasers are to battery
Module end plate 5 and the seam 3 of module side plate 6 carry out laser welding, 100 μm of galvanometer fibre diameter used, spot diameter
0.595mm, focus lamp focal length 460mm, the technological parameter of laser welding are：Laser welding power 5600w；Speed of welding 60mm/
s；Defocusing amount 0mm；Swing mode：Sinusoidal form, frequency 90Hz, amplitude 1mm；Welding process uses purity 99.9999%Ar
Protection, Ar flow 25L/min, during work, galvanometer 1 is adjusted to welding at 3 surface 460mm of seam by robot.
Step 2, laser welding power 5600w are received at arc position 1mm from distance to fading to 5040w at distance 0.5mm,
From away from receiving at arc position 0.5mm to fading to 3920w at distance 0.3mm, from away from receiving arc position 0.3mm to fading at end
2800w, the method effectively avoid receiving generation arc crater phenomenon at arc, and the purpose that galvanometer is swung is to increase the adaptability in gap,
Reduce the generation of stomata.
After the completion of laser welding, the phenomenon that weld seam is partially welded.
Embodiment 2, comprises the following steps：
Step 1, the selection of battery modules shell and first positioning；
Step 2, detection and secondary positioning before industrial vision weldering；
Step 3, robot carry galvanometer and carry out laser welding.
Step 1, the selection of battery modules shell and first positioning, this clamping process detect cylinder using magnetic switch
State, feeds back to controller 4, and controller 4 controls cylinder to be clamped action to corresponding site, corresponding site refer to battery mould
Group end plate 5 arrives separately at the precalculated position of frock clamp, battery modules end plate 5 used with module side plate 6：Material is that aluminium closes for 3
Gold, size are 149.3mm × 16.7mm × 94.7mm；Module side plate 6：Material be 3 line aluminium alloys, size for 515.2mm ×
3.0mm × 105.4mm, wherein, battery modules end plate 5 and 6 butt-joint clearance of module side plate are less than 0.1mm, and flatness is less than
0.1mm。
Step 2, detection and secondary positioning before industrial vision weldering, this vision process is to battery modules end plate 5 and module side plate
6 seam 3 carries out automatic identification positioning, the purpose is to：1st, after first positioning, detection 3 gap value of seam and unfitness of butt joint whether
In permitted scope；2nd, determine galvanometer compared with 3 specific welding position of seam, the light type of selected smart camera 2：It is blue
Color, focal length 72mm~108mm.
Step 3, robot carry galvanometer and carry out laser welding, this laser welding uses Yb：YAG solid state lasers are to electricity
The seam 3 of pond module end plate 5 and module side plate 6 carries out laser welding, and laser welding uses Yb：YAG solid state lasers are to battery
Module end plate 5 and the seam 3 of module side plate 6 carry out laser welding, 100 μm of galvanometer fibre diameter used, spot diameter
0.595mm, focus lamp focal length 460mm, the technological parameter of laser welding are：Laser welding power 5600w；Speed of welding 60mm/
s；Defocusing amount 0mm；Welding process is protected using purity 99.9999%Ar, Ar flows 25L/min.
Step 2: three, during work, before industrial vision weldering detection and secondary positioning refer to smart camera 2 reach seam 3 just on
Image Acquisition and processing are carried out at square 90mm, stores 3 profile information of seam, as shown in Figure 1, by with signal form by seam 3
Profile information passes to controller 4, and laser welding refers to 3 profile information of seam stored using controller 4, will by robot
Galvanometer 1 is adjusted to welding at 3 surface 460mm of seam.
After the completion of laser welding, there is the phenomenon that stomata, arc crater in weld seam.
Embodiment 3, comprises the following steps：
Step 1, the selection of battery modules shell and first positioning；
Step 2, detection and secondary positioning before industrial vision weldering；
Step 3, robot carry galvanometer and carry out laser welding.
Step 1, the selection of battery modules shell and first positioning, this clamping process detect cylinder using magnetic switch
State, feeds back to controller 4, and controller 4 controls cylinder to be clamped action to corresponding site, corresponding site refer to battery mould
Group end plate 5 arrives separately at the precalculated position of frock clamp, battery modules end plate 5 used with module side plate 6：Material is that aluminium closes for 3
Gold, size are 149.3mm × 16.7mm × 94.7mm；Module side plate 6：Material be 3 line aluminium alloys, size for 515.2mm ×
3.0mm × 105.4mm, wherein, battery modules end plate 5 and 6 butt-joint clearance of module side plate are less than 0.1mm, and flatness is less than
0.1mm。
Step 2, detection and secondary positioning before industrial vision weldering, this vision process is to battery modules end plate 5 and module side plate
6 seam 3 carries out automatic identification positioning, the purpose is to：1st, after first positioning, detection 3 gap value of seam and unfitness of butt joint whether
In permitted scope；2nd, determine galvanometer compared with 3 specific welding position of seam, the light type of selected smart camera 2：It is blue
Color, focal length 72mm~108mm.
Step 3, robot carry galvanometer and carry out laser welding, this laser welding uses Yb：YAG solid state lasers are to electricity
The seam 3 of pond module end plate 5 and module side plate 6 carries out laser welding, and laser welding uses Yb：YAG solid state lasers are to battery
Module end plate 5 and the seam 3 of module side plate 6 carry out laser welding, 100 μm of galvanometer fibre diameter used, spot diameter
0.595mm, focus lamp focal length 460mm, the technological parameter of laser welding are：Laser welding power 5600w；Speed of welding 60mm/
s；Defocusing amount 0mm；Swing mode：Sinusoidal form, frequency 90Hz, amplitude 1mm；Welding process uses purity 99.9999%Ar
Protection, Ar flows 25L/min.
Step 3, laser welding power 5600w are received at arc position 1mm from distance to fading to 5040w at distance 0.5mm,
From away from receiving at arc position 0.5mm to fading to 3920w at distance 0.3mm, from away from receiving arc position 0.3mm to fading at end
2800w, the method effectively avoid receiving generation arc crater phenomenon at arc, and the purpose that galvanometer is swung is to increase the adaptability in gap,
Reduce the generation of stomata.
Step 2: three, during work, before industrial vision weldering detection and secondary positioning refer to smart camera 2 reach seam 3 just on
Image Acquisition and processing are carried out at square 90mm, stores 3 profile information of seam, by being passed 3 profile information of seam with signal form
Controller 4 is passed, and laser welding is referred to 3 profile information of seam stored using controller 4, galvanometer 1 adjusted by robot
The welding at 3 surface 460mm of seam.
Step 2: three, industrial vision to weld seam precise positioning and optimization laser welding process parameter method, postwelding weldering is wide
Between 3mm~4mm, between 3mm~3.4mm, postwelding welds wide one side edge and is kept apart from 6 one side edge of module side plate fusion penetration
Between 1.2mm~1.5mm, such welding method operating procedure is simple, highly practical, and positioning accuracy is high, optimization laser welding
Technological parameter ensure that Weld Performance is good, beautiful appearance, zero defect, meet customer need, it is demonstrated experimentally that this method is to vapour
The postwelding weldquality of vehicle power battery case significantly improves.
The method for laser welding of this kind of automobile power cell aluminum alloy casing, operating procedure is simple, highly practical, positioning accurate
Degree is high, optimization laser welding process parameter, ensure that Weld Performance is good, beautiful appearance, zero defect, meets customer need, be
People provide a great help.
Finally it should be noted that：The foregoing is only a preferred embodiment of the present invention, is not intended to limit the invention,
Although the present invention is described in detail with reference to the foregoing embodiments, for those skilled in the art, still may be used
To modify to the technical solution recorded in foregoing embodiments or carry out equivalent substitution to which part technical characteristic,
Within the spirit and principles of the invention, any modifications, equivalent replacements and improvements are made should be included in the present invention's
Within protection domain.
Claims (6)
1. a kind of method for laser welding of automobile power cell aluminum alloy casing, which is characterized in that including galvanometer（1）, intelligent phase
Machine（2）, seam（3）, controller（4）, module end plate（5）, module side plate（6）And following steps：
Step 1, the selection of battery modules shell and first positioning；
Step 2, detection and secondary positioning before industrial vision weldering；
Step 3, robot carry galvanometer and carry out laser welding.
2. a kind of method for laser welding of automobile power cell aluminum alloy casing according to claim 1, which is characterized in that
Positioning for the first time is to detect the state of cylinder using magnetic switch and feed back to controller in the step 1（4）, the controller
（4）Control cylinder positions battery modules for the first time, ensures battery modules end plate（5）With module side plate（6）Butt-joint clearance is small
In 0.1mm, flatness is less than 0.1mm.
3. a kind of method for laser welding of automobile power cell aluminum alloy casing according to claim 1, which is characterized in that
Detection and secondary positioning refer to battery modules end plate before industrial vision weldering in the step 2（5）With module side plate（6）Connect
Detection and automatic identification positioning, after positioning for the first time, detect seam before seam is welded（3）Whether gap value and flatness
In permitted scope, it is then determined that galvanometer（1）Compared with seam（3）Specific welding position.
4. a kind of method for laser welding of automobile power cell aluminum alloy casing according to claim 3, which is characterized in that
The smart camera（2）Light type for blueness, and focal length be 72mm~108mm.
5. a kind of method for laser welding of automobile power cell aluminum alloy casing according to claim 1, which is characterized in that
Robot carries galvanometer and carries out laser welding in the step 3, and the technological parameter of welding is：100 μm of fibre diameter；Hot spot is straight
Footpath 0.595mm；Focus lamp focal length 460mm；Laser welding power P5000w~6000w；Speed of welding 40mm/s~70mm/s；From
Burnt amount -2mm~2mm；Swing mode：Sinusoidal form, frequency 80Hz~120Hz, amplitude 0.7mm~1.2mm；Welding process
It is protected using purity 99.9999%Ar, Ar flows 20L/min~30L/min.
6. a kind of method for laser welding of automobile power cell aluminum alloy casing according to claim 5, which is characterized in that
The laser welding power P is received at arc position 1mm from distance to fading to 0.9P at distance 0.5mm, from away from receiving arc position 0.5mm
0.7P is faded at place extremely distance 0.3mm, fades to 0.5P at away from receipts arc position 0.3mm to end, the method is effectively kept away
Exempt from receiving generation arc crater phenomenon at arc.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711156802.1A CN108098140A (en) | 2017-11-20 | 2017-11-20 | A kind of method for laser welding of automobile power cell aluminum alloy casing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711156802.1A CN108098140A (en) | 2017-11-20 | 2017-11-20 | A kind of method for laser welding of automobile power cell aluminum alloy casing |
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| CN108098140A true CN108098140A (en) | 2018-06-01 |
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ID=62207346
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| CN201711156802.1A Pending CN108098140A (en) | 2017-11-20 | 2017-11-20 | A kind of method for laser welding of automobile power cell aluminum alloy casing |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109158758A (en) * | 2018-10-11 | 2019-01-08 | 中国航空制造技术研究院 | A kind of adaptive regulation device in barrel components longitudinal joint laser welding gap and method |
| CN110293292A (en) * | 2018-03-22 | 2019-10-01 | 嘉意机床（上海）有限公司 | A kind of cylinder intelligence welding all-in-one machine and its welding procedure |
| CN112548319A (en) * | 2020-12-29 | 2021-03-26 | 广东省科学院中乌焊接研究所 | Control method, device and system of handheld laser welding equipment |
| CN112894138A (en) * | 2021-03-04 | 2021-06-04 | 武汉逸飞激光股份有限公司 | Soft package battery tab welding method and system |
| CN113020791A (en) * | 2021-03-12 | 2021-06-25 | 武汉逸飞激光股份有限公司 | Welding method for outer frame of battery module |
| CN113751875A (en) * | 2021-11-05 | 2021-12-07 | 武汉逸飞激光股份有限公司 | Sealing welding method and device for battery shell cover |
| CN113927164A (en) * | 2021-12-16 | 2022-01-14 | 铭镭激光智能装备（河源）有限公司 | Aluminum-shell battery flexible connection laser welding device |
| CN114559155A (en) * | 2022-04-01 | 2022-05-31 | 合肥国轩高科动力能源有限公司 | Laser welding system and process |
| WO2022156800A1 (en) * | 2021-01-22 | 2022-07-28 | Trumpf (China) Co., Ltd. | Laser welding system for sealingly welding a cell top cover and corresponding method |
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| CN110293292A (en) * | 2018-03-22 | 2019-10-01 | 嘉意机床（上海）有限公司 | A kind of cylinder intelligence welding all-in-one machine and its welding procedure |
| CN109158758A (en) * | 2018-10-11 | 2019-01-08 | 中国航空制造技术研究院 | A kind of adaptive regulation device in barrel components longitudinal joint laser welding gap and method |
| CN112548319A (en) * | 2020-12-29 | 2021-03-26 | 广东省科学院中乌焊接研究所 | Control method, device and system of handheld laser welding equipment |
| CN112548319B (en) * | 2020-12-29 | 2022-04-05 | 广东省科学院中乌焊接研究所 | Control method, device and system of handheld laser welding equipment |
| WO2022156800A1 (en) * | 2021-01-22 | 2022-07-28 | Trumpf (China) Co., Ltd. | Laser welding system for sealingly welding a cell top cover and corresponding method |
| CN112894138A (en) * | 2021-03-04 | 2021-06-04 | 武汉逸飞激光股份有限公司 | Soft package battery tab welding method and system |
| CN113020791A (en) * | 2021-03-12 | 2021-06-25 | 武汉逸飞激光股份有限公司 | Welding method for outer frame of battery module |
| CN113751875A (en) * | 2021-11-05 | 2021-12-07 | 武汉逸飞激光股份有限公司 | Sealing welding method and device for battery shell cover |
| CN113927164A (en) * | 2021-12-16 | 2022-01-14 | 铭镭激光智能装备（河源）有限公司 | Aluminum-shell battery flexible connection laser welding device |
| CN114559155A (en) * | 2022-04-01 | 2022-05-31 | 合肥国轩高科动力能源有限公司 | Laser welding system and process |
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Application publication date: 20180601 |