CN106825958B - Battery core automatic welding detection device and method - Google Patents
Battery core automatic welding detection device and method Download PDFInfo
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- CN106825958B CN106825958B CN201710157425.7A CN201710157425A CN106825958B CN 106825958 B CN106825958 B CN 106825958B CN 201710157425 A CN201710157425 A CN 201710157425A CN 106825958 B CN106825958 B CN 106825958B
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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
- B23K26/70—Auxiliary operations or equipment
-
- 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
-
- 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
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
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- Optics & Photonics (AREA)
- Mechanical Engineering (AREA)
- Plasma & Fusion (AREA)
- Laser Beam Processing (AREA)
Abstract
The present invention relates to battery core automatic welding detection device and methods, the battery core automatic welding detection device includes that integrated welding is agreed to play and takes the photograph structure, conveyer belt, mechanical arm, laser-beam welding machine and manipulator for removing substandard product, it includes pedestal that integrated welding, which is agreed to play and takes the photograph structure, picture shooting assembly, laser input light path component and common optical pathways component, picture shooting assembly includes industrial camera, laser input light path component includes collimation cylinder and water cooling module, common optical pathways component includes welding camera lens, industrial camera is equipped with taking lens, collimate cylinder, industrial camera, welding camera lens is connected on pedestal, water cooling module is located on pedestal, welding camera lens is oppositely arranged with taking lens, and the coated reflection microscope group of the reflecting surface and pedestal bottom edge angle at 45 ° that are mutually parallel is equipped in pedestal.The invention avoids human contacts to detect the secondary injury caused by detection object, has adapted to the requirement of automatic assembly line automation and intelligentification.
Description
Technical field
The present invention relates to the automatic laser welding detection devices of electrical core of power battery, more specifically refer to battery core automatic welding
Connect detection device and method.
Background technology
With the adjustment of national industrial policies and the intensive appearance of new-energy automobile support policy, new-energy automobile market
Explosive growth is presented, power battery is the core of the sector, and the development of new-energy automobile market makes power battery enterprise confused
It confusingly expands production, market competition is white-hot.In order to constantly meet the requirement of more high efficiency and quality management and control, enhance the market of product
Competitive advantage, improves occupation rate of market, and the power battery production line not high to existing the degree of automation is into technological transformation, Cheng Liaodong
The inevitable choice of power battery production enterprise.
In power battery automatic assembly line, the laser welding of cell polar ear is important basic process, welding quality
Directly affect the qualification rate of finished product.Process generally use laser welding in actual production, since Laser Welding is (especially automatic
Laser welding) complex process, the factor for influencing welding quality is more, causes the fluctuation of solder joint qualification rate larger.Therefore, swash perfect
While photocoagulation technique, stable welding quality, defective products must also be rejected by reinforcing on-line checking, under preventing defective products from flowing into
Procedure.
Now there are three types of detection modes, the first is to use artificial direct-on-line or offline inspection, but efficiency is low, detection speed
Degree is slow, and stability is not high；Second is vision-based detection and the semi-automatic method being manually combined, but the degree of automation is not high, difficult
To adapt to the production requirement of automation and intelligentification；The third is the non-integral inspection that welding detects phase separation with online vision automatically
Survey method needs two stations to complete, occupies more space resources, while increasing and coordinating complexity between process, influences
The further promotion of production efficiency.
It includes machine that Chinese patent 201310676529.0, which discloses a kind of welder and its welding method, the welder,
Tool arm 8 and the laser welding head of setting on the robotic arm, the infrared light for shooting real-time weld seam or ultraviolet light first it is three-dimensional at
The second three-dimensional imaging instrument of visible light as instrument and for shooting sizing weld seam.The welding method includes step：1. using Laser Welding
Connector processing criterion weld seam on material to be processed, real-time weld image and sizing weld seam figure of the smart host to the standard weld
As carrying out Data Analysis Services and being recorded as standard parameter；2. carry out laser welding, the first three-dimensional imaging instrument of smart host pair
The sizing weld image that the real-time weld image and the second three-dimensional imaging instrument obtained obtains carries out Data Analysis Services and is recorded as
Real-time parameter；3. more each real-time parameter of smart host and standard parameter.The present invention can be widely used in the laser of a variety of materials
In welding production, effectively judge whether real-time weld seam is qualified.But that there are structures is complex for the welder, installation occupies sky
Between big problem.
Therefore, it is necessary to design a kind of battery core automatic welding detection device, electrical core of power battery production detection oneself is realized
Dynamicization and intelligence improve detection efficiency and stability, reduce testing cost, while saving space resources, improving production efficiency.
Invention content
It is an object of the invention to overcome the deficiencies of existing technologies, battery core automatic welding detection device and method are provided.
To achieve the above object, the present invention uses following technical scheme：Battery core automatic welding detection device, including integration
Welding shooting structure, conveyer belt, mechanical arm, laser-beam welding machine and the manipulator for removing substandard product；Integrated welding
It agrees to play and takes the photograph structure by by illumination light and laser common optical pathways, making laser welding and the function dress of different nature of image taking two
It sets and is combined into one comprising pedestal, picture shooting assembly, laser input light path component and common optical pathways component, the picture shooting assembly
Including industrial camera, the laser input light path component includes collimation cylinder and water cooling module, the common optical pathways component include
Camera lens is welded, the industrial camera is equipped with taking lens, and the collimation cylinder, industrial camera, welding camera lens are connected to institute
It states on pedestal, the water cooling module is located on pedestal, and the welding camera lens is oppositely arranged with the taking lens, and the pedestal
The interior coated reflection microscope group equipped with the reflecting surface being mutually parallel Yu pedestal bottom edge angle at 45 °, when being welded to welding assembly,
Laser arrives at welding position, position from collimation cylinder input after the coated reflection microscope group enters the welding lens focus
Headlamp under pedestal sends out illumination light, the welding camera lens is entered after welding position reflects, and be transmitted to the bat
Camera lens is taken the photograph, image is formed in the industrial camera；The mechanical arm is connect with the pedestal, and conduct is connected on the pedestal
The headlamp of lighting source；The mechanical arm and the manipulator are located at the side of the conveyer belt；The collimation cylinder
Upper end be equipped with optical fiber interface, the laser-beam welding machine connect by optical fiber with the optical fiber interface.
Its further technical solution is：The welding camera lens is located at the both ends of the pedestal with the taking lens.
Its further technical solution is：Collimation microscope group is connected between the collimation cylinder and the pedestal, laser passes through institute
After stating collimation cylinder, the coated reflection microscope group is transmitted to via collimation microscope group.
Its further technical solution is：The welding camera lens includes sequentially connected laser condensing lens, protection eyeglass, mirror sleeve
And mirror cover, the mirror sleeve are connect by counter flange with the pedestal.
Its further technical solution is：The coated reflection microscope group includes two metallic-membrane plating reflectors, and two plated films are anti-
The reflecting surface for penetrating mirror is parallel, and with pedestal bottom edge angle at 45 °, one end of metallic-membrane plating reflector inside with the pedestal respectively
Wall connects.
Its further technical solution is：The battery core automatic welding detection device further includes industrial personal computer, display, driving
Device, image pick-up card and alarm, the driver, industrial camera, welding camera lens, display, alarm, image pick-up card
And the laser-beam welding machine is connect with the industrial personal computer respectively.
The present invention also provides the visible detection method of battery core automatic welding detection device, the method has used above-mentioned
Battery core automatic welding detection device, the detection method include：
S1, welding shooting acquisition both sides tab welding portion is carried out to battery core both sides lug respectively by " welding-shooting " sequence
The image of position；
S2, extract described image anchor point position data；
S3, judge described image anchor point position whether with set by the welding qualification cell polar ear as examination criteria
Fixed reference position overlaps, if misaligned, enters S4 steps, if overlapping, enters S5 steps；
S4, its offset is calculated by the image data of shooting, carry out position correction, and enter S5 steps；
S5, on the basis of the anchor point of described image, described image is split, segmentation area solder joint melting zone is obtained
Range, radius and area, average gray value, mean contrast value, position of centre of gravity, horizontal continuity degree, vertical continuous degree, as
The characteristic parameter of each cut section solder joint, into S6 steps
S6, judge whether the characteristic parameter of each cut section solder joint of two lugs of battery core is qualified, if qualified, enters
S8 steps；
S7, battery core welding are unqualified, and industrial personal computer is additional not to be conformed to case marking, explanation and export removal instruction, manipulator by its
Remove assembly line；
S8, MES carry out data statistics, complete a round of visits.
Its further technical solution is：Judge the side of the characteristic parameter of each cut section solder joint of two lugs of battery core
Method, if the solder joint melting zone radius and area in each region of described image, average gray value, mean contrast value, center-of-gravity value, level are even
Continuous angle value, vertical continuous angle value are qualified, then the battery core side tab welding is qualified, only the qualified electricity of both sides tab welding
The tab welding of core is just qualified, and otherwise cell polar ear welding is unqualified；For welding underproof battery core, it is attached that MES manages system
Unqualified explanation is added to go forward side by side line number according to statistics, industrial personal computer output removes instruction, and manipulator is moved out assembly line.
Its further technical solution is：It is described that welding bat is carried out to battery core both sides lug respectively by " welding-shooting " sequence
Before the step of taking the photograph the image for obtaining both sides tab welding position, further include：
Before on-line checking, by the both sides tab welding region by examining, assert the qualified battery core of welding with anchor point
On the basis of be individually positioned on welding position, take pictures to its welding region, obtain standard picture simultaneously extract its characteristic parameter
Value, is stored in database, the standard as judgement.
Compared with the prior art, the invention has the advantages that：The battery core automatic welding detection device of the present invention, by setting
It sets integrated welding and agrees to play and take the photograph structure, conveyer belt, laser-beam welding machine and the manipulator for removing unqualified welding assembly 4, it is real
Existing full automatic welding and online vision-based detection, simulation human eye read be tested welding assembly online to the identification process of object
Lug solder joint image information carry out qualification judgement, obtain speed image it is fast, it is efficient, it is at low cost, it is this non-contact
The detection of formula avoids human contact's detection secondary injury caused by detection object, has adapted to automatic assembly line automation intelligence
The requirement of energyization.
The invention will be further described in the following with reference to the drawings and specific embodiments.
Description of the drawings
Fig. 1 is that the integrated welding that the specific embodiment of the invention provides agrees to play the main structure diagram for taking the photograph structure；
Fig. 2 is that the integrated welding that the specific embodiment of the invention provides agrees to play the configuration schematic diagram for taking the photograph structure；
Fig. 3 is the main structure diagram for the automatic soldering device that the specific embodiment of the invention provides；
Fig. 4 is the flow diagram of the vision-based detection for the automatic soldering device that the specific embodiment of the invention provides.
Reference numeral
10 pedestal, 11 industrial personal computer
12 driver, 13 display
14 alarm, 15 manipulator
16 image pick-up card, 17 laser-beam welding machine
18 lug, 1 illumination path
20 industrial camera, 21 taking lens
22 flange, 2 laser optical path
30 collimation 31 optical fiber interfaces of cylinder
32 water cooling module, 33 connector
34 collimation 3 conveyer belts of microscope group
40 counter flange, 41 protective shell
42 laser condensing lens, 43 mirror sleeve
44 protection 45 mirror covers of eyeglass
4 welding assembly, 5 code reader
60 coated reflection microscope group, 6 position sensor
7 optical fiber, 8 mechanical arm
9 headlamps
Specific implementation mode
In order to more fully understand the present invention technology contents, with reference to specific embodiment to technical scheme of the present invention into
One step introduction and explanation, but not limited to this.
Specific embodiment as shown in figures 1-4, integrated welding provided in this embodiment, which is agreed to play, takes the photograph structure, can be used in
It in 18 laser beam welding of lug of battery core, or can be used in the laser beam welding of other workpiece, realization is being welded
After shoot photo in time to make the need detected, improve detection and production efficiency dropped without occupying more space resources
While low testing cost, the stability of detection quality is improved.
By by illumination light and laser common optical pathways, making two functional devices of different nature of laser welding and image taking
It is combined into one comprising pedestal 10, picture shooting assembly, laser input light path component and common optical pathways component, picture shooting assembly include
Industrial camera 20, laser input light path component include collimation cylinder 30 and water cooling module 32, and the common optical pathways component includes weldering
Camera lens is connect, the industrial camera 20 is equipped with taking lens 21, and the collimation cylinder 30, industrial camera 20, welding camera lens connect respectively
It is connected on the pedestal 10, the water cooling module 32 is located on pedestal 10, and the welding camera lens is opposite with the taking lens 21
Setting, and the coated reflection microscope group 60 of the reflecting surface and 10 bottom edge of pedestal angle at 45 ° that are mutually parallel is equipped in the pedestal 10, when
Welding assembly 4 is welded, laser is inputted from collimation cylinder 30, and the welding mirror is entered by the coated reflection microscope group 60
Head arrives at welding position after focusing, and the lighting source under pedestal 10 sends out illumination light, enters after welding position reflects
The welding camera lens, and it is transmitted to the taking lens 21, image is formed in the industrial camera 20.
Above-mentioned plated film microscope group only generates reflex to the laser of specific wavelength, and reflection does not occur to other light makees
With allowing its former road transmission.The pedestal 10 is the carrier of picture shooting assembly, laser input light path component and common optical pathways component,
Collecting, integrate and sharing for laser optical path 2 and illumination path 1 is realized by the pedestal 10.
Welding camera lens is located at the both ends of pedestal 10 with taking lens 21, specifically, taking lens 21 is located at the pedestal
10 top, welding camera lens are located at the bottom of pedestal 10.
Collimation microscope group 34 is connected between collimation cylinder 30 and the pedestal 10, after laser is by collimating cylinder 30, via collimation
Microscope group 34 is transmitted to coated reflection microscope group 60.Collimation microscope group 34 is installed on by connector 33 in collimation cylinder 30,33 He of connector
Pedestal 10 is connected by fastening screw；Water cooling module 32 is distributed in the outer wall of collimation cylinder 30 and pedestal 10, collimates the upper end of cylinder 30
Equipped with 7 access port of optical fiber, welding laser by optical fiber 7 is input to the integrated welding from the mouth to be agreed to play and takes the photograph structure, and weldering is finally arrived at
Implement welding in socket part position.
Welding camera lens includes sequentially connected laser condensing lens 42, protection eyeglass 44, mirror sleeve 43, mirror cover 45, and mirror sleeve 43 is logical
It crosses counter flange 40 to connect with the pedestal 10, welding camera lens further includes protection cap, the laser condensing lens 42, protection eyeglass 44
It being installed in counter flange 40 by mirror sleeve 43, microscope base, protection cap is installed in end, is connected by counter flange 40 and pedestal 10,
The laser condensing lens 42, protection eyeglass 44 have passed through special coating film treatment, and reflection only, which occurs, to the laser of specific wavelength makees
With permission visible light original road is transmitted.
Laser reaches base from the input of optical fiber interface 31 of collimation cylinder 30 after collimation cylinder 30 and its collimation microscope group 34 adjust
Coated reflection microscope group 60 in seat 10 arrives the common optical pathways group of 10 lower end of motor seat after 90 ° of direction change twice in succession
Part exports after over-focusing from end in common optical pathways component, finally arrives at welding position, implements welding.
The headlamp 9 of 10 lower part of pedestal carries out wide-angle irradiation to welding position, and welding position reflects illumination light,
Reflected light enters common optical pathways from laser exit, in common optical pathways pass through protection eyeglass 44, laser focus after arrive at pedestal 10,
Be directed through the imaging optical path for entering upper end after coated reflection microscope group 60, arrived at after being focused by shooting mirror industrial camera 20 at
Picture.
Above-mentioned water cooling module 32 is distributed in collimation cylinder 30,40 outer wall of pedestal 10 and counter flange, and water cooling module 32 is located at
On laser optical path 2, and connect with outer circulation water phase, to keep the stabilization of 2 temperature of laser optical path.
In addition, coated reflection microscope group 60 includes two metallic-membrane plating reflectors, the reflecting surface of two metallic-membrane plating reflectors is parallel,
And with 10 bottom edge of pedestal angle at 45 °, one end of metallic-membrane plating reflector is connect with the madial wall of the pedestal 10 respectively.
As shown in Figure 1,1 in figure be illumination path 1,2 is laser optical path 2；Above-mentioned illumination light and laser is in collimation cylinder
Converge in 30, but transmission direction is on the contrary, laser is entered by the optical fiber interface 31 of collimation cylinder 30, by the entrance of coated reflection microscope group 60
Counter flange 40 arrives at welding assembly 4 after the focusing of laser condensing lens 42.Illumination light is sent out by lighting source, by welding
Component 4 is reflected into welding camera lens, after laser condensing lens 42 and protection eyeglass 44, counter flange 40 is passed through to enter camera shooting
Camera lens 21 arrives at industrial camera 20, forms image.
In the present embodiment, coated reflection microscope group 60 and 44 laser condensing lens 42, protection, eyeglass in counter flange 40
It works to laser, reflex is not occurred to illumination light.
Above-mentioned integrated welding, which is agreed to play, takes the photograph structure, makes welding laser and shooting illumination common optical pathways, simplifies structure, make figure
As obtain can after welding moment complete, to make need that detect, be not take up the additional time, improve detection and production is imitated
Rate；It is not required to that special shooting station is arranged, has saved space resources, reduced production cost.
As shown in figure 3, the present embodiment additionally provides battery core automatic welding detection device, including above-mentioned integrated welding is agreed to play
Take the photograph structure, conveyer belt 3, mechanical arm 8, laser-beam welding machine 17 and the manipulator 15 for removing substandard product；The machinery
Arm 8 is connect with the pedestal 10, and the headlamp 9 as lighting source is connected on the pedestal 10；The mechanical arm 8 and institute
State the side that manipulator 15 is located at the conveyer belt 3；The upper end of the collimation cylinder 30 is equipped with optical fiber interface 31, the laser
Bonding machine 17 is connect by optical fiber 7 with the optical fiber interface 31.
Further, automatic welding vision on-line measuring device further include industrial personal computer 11, display 13, driver 12,
Image pick-up card 16 and alarm 14, the driver 12, industrial camera 20, welding camera lens, display 13, alarm 14,
Image pick-up card 16 and the laser-beam welding machine 17 are connect with the industrial personal computer 11 respectively.The side of conveyer belt 3 is equipped with coding
Reader 5 and position sensor 6, code reader 5 and position sensor 6 are connect with the industrial personal computer 11 respectively.Position
Sensor 6 provides the accurate location information of relay part to be welded for the shooting of video camera, in the present embodiment, using resolution
Rate meets the encoding sensor of detection speed.
In addition, including camera control, image procossing, user management, Technical innova- tion (MES) software system in described device
System and help module.
In the present embodiment, code reader 5, position sensor 6 are located at the same side of conveyer belt 3, certainly, in other realities
Example is applied, can be with interlaced arrangement in the both sides of conveyer belt 3, the coding position by being soldered object determines.
Above-mentioned industrial camera 20 uses under high speed monochrome industrial digital along trigger-type camera, configures manual zoom mirror
Head adjusts its visual field to meet the requirement of detection range before test according to detection position size；Image pick-up card 16 uses 256 grades
Gray scale, 768 × 576 resolution ratio, sample rate are the pci card that 65M transmission rates are 132M/S.
In addition, driver 12 is for driving mechanical arm 8, manipulator 15, laser-beam welding machine 17, industrial camera 20 and alarm
The work of device 14, headlamp 9.
The operation principle of described device is as follows：Conveyer belt 3 conveys battery core to the induction range of code reader 5, and coding is read
Take the coding transmission of device reading battery core to industrial personal computer 11, when conveyer belt 3 conveys the induction range of battery core in-position sensor 6,
Industrial personal computer 11 is detected the position of battery core, and when reaching setting position, industrial personal computer 11 starts mechanical arm 8 by driver 12 will
Integrated welding, which is agreed to play, to be taken the photograph structure and is moved to the setting position for waiting for the top of welding electrode ear 18, and industrial personal computer 11 starts laser-beam welding machine 17 and exports
For laser to optical fiber 7, laser enters the side lug 18 that laser optical path 2 reaches battery core by collimating the optical fiber interface 31 of cylinder 30, presses
Side lug 18 is welded according to setting program, laser-beam welding machine 17 sends out signal, industrial personal computer 11 to industrial personal computer 11 after the completion
It receives after signal is completed in welding and is taken pictures to welding zone by the startup of driver 12 shooting headlamp 9 and industrial camera 20, taken pictures
It finishes, closes light, industrial camera 20 is sent to image pick-up card 16 after being cached to image, image pick-up card 16 is according to setting
Determine program and processing transformation is carried out to image data, be sent to industrial personal computer 11 after the completion, completes battery core according to above-mentioned steps after the completion
Side lug 18 welding shooting.
Industrial personal computer 11 is encoded the welding zone picture signal code reader 5 of two lug 18 of battery core is read into rower
Know, industrial personal computer 11 the detection file of generation battery core after operations such as pre-processes image, divides, identifies and understands and and sets
Fixed standard, which is compared, judges whether the welding of battery core both sides lug 18 is qualified, if qualified, qualified mark is exported, if not conforming to
Lattice, then industrial personal computer 11 controls alarm 14 by driver 12 and sends out sound and light alarm signal, and is not conformed to by the removal of machine manipulator 15
The battery core of lattice.Test data finally enters statistical forms.
Above-mentioned welding assembly 4 is battery core, and certainly, in other embodiment, above-mentioned welding assembly 4 can be other needs
The product of welding.
Above-mentioned industrial personal computer 11 is using the CPU industrial personal computers 11 of 3.0G or more, and lighting source is using annular highlighted
Shadowless lamp directional lighting in a manner of the wide-angle of top.
Manipulator 15 using working range 0.8m, load-carrying 3Kg 4 shaft industrial robots.
It is agreed to play by the way that integrated welding is arranged and takes the photograph structure, conveyer belt 3, laser-beam welding machine 17 and for removing unqualified welding
The manipulator 15 of component 4 realizes full automatic welding and online vision-based detection, simulates identification process of the human eye to object,
Line reads the judgement of the image information progress qualification for 18 solder joint of lug for being tested welding assembly 4, and acquisition speed image is fast, efficiency
Height, at low cost, this contactless detection avoid human contact's detection secondary injury caused by detection object, adapt to
The requirement of automatic assembly line automation and intelligentification.
Further, as shown in figure 4, the present embodiment additionally provides the online vision inspection of battery core automatic welding detection device
Survey method, the detection method include：
It, will be by examining, assert that the welding region of the lug 18 of qualified welding assembly 4 is placed before S10, on-line checking
It on welding position, takes pictures to welding region after setting datum mark, obtains standard picture, extract characteristic parameter and be stored in
In database, the standard as judgement.
S1, welding shooting acquisition both sides tab welding portion is carried out to battery core both sides lug respectively by " welding-shooting " sequence
The image of position；
S2, extract described image anchor point position data；
S3, judge described image anchor point position whether with 18 institute of welding qualification cell polar ear as examination criteria
The reference position of setting overlaps, if misaligned, enters S4 steps, if overlapping, enters S5 steps；
S4, the offset that its anchor point is calculated by the image data of shooting carry out position correction, enter after amendment next
Step；
S5, on the basis of the anchor point of described image, described image is split, segmentation area solder joint melting zone is obtained
Range, radius and area, average gray value, mean contrast value, position of centre of gravity, horizontal continuity degree, vertical continuous degree, as
The characteristic parameter of each cut section solder joint, into S6 steps；
S6, judge whether the characteristic parameter of each cut section solder joint of two lugs of battery core is qualified, if qualified, enters
S8 steps；
S7, battery core welding are unqualified, and industrial personal computer is additional not to be conformed to case marking, explanation and export removal instruction, manipulator by its
Remove assembly line；
S8, MES carry out data statistics, complete a round of visits.
S1 steps include coding reading, a series of actions of position detection and mechanical arm 8 to welding electric core, that is, transmit
Component 4 to be welded is transported to specified position by band 3, code reader 5 reads corresponding coding, position sensor 6 detect it is to be welded
After component reaches setting position, integral structure body is moved to by mechanical arm 8 waits for that 18 top of welding electrode ear, industrial personal computer 11 start laser
17 light extraction of bonding machine, integrated welding are agreed to play the program for taking the photograph structure according to setting and are welded to the side lug 18 of welding assembly 4,
After completion signal is sent out to industrial personal computer 11.Industrial personal computer 11 starts headlamp 9 after receiving welding completion signal and industrial camera 20 is right
Welding zone is taken pictures, and is taken pictures and is finished, and headlamp 9 is closed, and industrial camera 20 is sent to image pick-up card after being cached to image
16 and industrial personal computer 11 is eventually arrived at, integrated welding, which is agreed to play, after the completion takes the photograph structure and welded, taken pictures to other end lug 18.
S2 steps, the step of extracting the locating point data of image, the setting flag point usually in the coverage of welded article,
And in this, as the datum mark (usually having two) of shooting positioning.Anchor point is online shooting image and the figure as criterion of acceptability
As the benchmark compared loses comparativity if the shooting datum mark of the two is inconsistent.
S3 steps, judge the anchor point of described image position whether with the welding qualification cell polar ear as examination criteria
The step of reference position set by 18 overlaps, the coordinate data here by detection positioning datum point judge whether it is setting
Range.
S5 steps close rule to positioning datum point position or carry out subregion by revised image, obtain and describe the image
The characteristic parameter of quality, the foundation as multilevel iudge.Certainly, it for different other embodiments, can also set different
Cut zone, depending on concrete foundation actual conditions.
S6 steps, the extracted characteristic parameter of detection judge whether welding zone solder joint closes whether in the range of setting with this
Whether lattice and entire welding quality are qualified.There is the notice (sound-light alarm) after defective work, subsequent processing (removes production
Line) and data analysis statistical be the content of S7, S8 step, to realize the recourse property of process, as production process record text
Part and the significant data foundation of sustained improvement.
S6 steps judge the method for the characteristic parameter of each cut section solder joint of cell polar ear, if each area of described image
Solder joint melting zone radius and area, average gray value, mean contrast value, center-of-gravity value, horizontal continuity angle value, the vertical continuous degree in domain
Value is qualified, then the corresponding tab welding of the battery core is qualified, then judges whether other side lug is qualified by S2-S5 steps, only
The welding of lug 18 that both sides lug 18 welds the qualified battery core is just qualified, and otherwise cell polar ear welding is unqualified.For welding
Underproof battery core, industrial personal computer add unqualified explanation and export removal instruction, and manipulator is moved out assembly line.MES is to inspection
It surveys result and carries out data statistics.
In the actual production process, it is relatively low to generate the identical solder joint probability of image features, the figure of qualified solder joint
As characteristic ginseng value should be distributed in a certain range, corresponding acceptability limit is set according to real application data statistical result
It is the important content of criterion of acceptability setting.
All online shooting images and processing data are using battery core coding (identification code) as main body.
In addition, the camera control software of described device can make device obtain 18 weld point image of lug of high quality, inside have
A series of adaptable parameter adjustment of and production environment, setting interface；Image processing system includes that absorbed weld point image becomes
Change the foundation of processing and certified products standard feature database；The foundation of certified products standard feature database need to be before on-line checking
It carries out, its acquisition of packet image, the extraction of characteristic parameter and storage, the setting of acceptability limit；The detection process of weld point image is
On-line implement process, include the acquisition to rigid 18 welding zone image of soldered cell polar ear, the extraction of characteristic parameter, caching,
Transmission, whether qualified judgement and the label processing etc. that exports defective work；Subscriber Management System is to user registration and permission
It is managed, production management (MES) software systems are for and output for statistical analysis to the data in production process；Help mould
Block is for instructing the proper use of this system of user.
The online visible detection method of above-mentioned battery core automatic welding detection device, by simulating human eye to object identification
Process, the online image information for reading 18 solder joint of lug for being tested welding assembly 4 and preset, corresponding acceptance value into
Row comparative analysis judges whether tested welding assembly 4 is qualified, and qualified signal is exported if qualified, is otherwise exported not with this
Qualifying signal, while mechanical hand 15 removes underproof welding assembly 4, completes an automatic detection cycle, the acquisition of image is not
The additional time can be occupied, has speed fast, efficient, the features such as accuracy is high, eliminates the examined personnel master of testing result
The influence of the human factors such as wish is seen, it is with a high credibility, it is thus also avoided that human contact's detection secondary injury caused by detection object.
It is above-mentioned only with embodiment come the technology contents that further illustrate the present invention, in order to which reader is easier to understand, but not
It represents embodiments of the present invention and is only limitted to this, any technology done according to the present invention extends or recreation, by the present invention's
Protection.Protection scope of the present invention is subject to claims.
Claims (9)
1. battery core automatic welding detection device, which is characterized in that agreed to play including integrated welding and take the photograph structure, conveyer belt, mechanical arm, swash
Photocoagulator and manipulator for removing substandard product；Integrated welding, which is agreed to play, takes the photograph structure by the way that illumination light and laser to be total to
With light path, two functional devices of different nature of laser welding and image taking are made to be combined into one comprising pedestal, shooting group
Part, laser input light path component and common optical pathways component, the picture shooting assembly include industrial camera, the laser input light path
Component includes collimation cylinder and water cooling module, and the common optical pathways component includes welding camera lens, and the industrial camera, which is equipped with, to be clapped
Camera lens is taken the photograph, the collimation cylinder, industrial camera, welding camera lens are connected on the pedestal, and the water cooling module is located at pedestal
On, the welding camera lens is oppositely arranged with the taking lens, and the reflecting surface and pedestal being mutually parallel are equipped in the pedestal
The coated reflection microscope group at bottom edge angle at 45 °, when being welded to welding assembly, laser is from collimation cylinder input, by the plating
Film speculum group arrives at welding position after entering the welding lens focus, and the headlamp under pedestal sends out illumination light,
Enter the welding camera lens after welding position reflects, and be transmitted to the taking lens, is formed in the industrial camera
Image；The mechanical arm is connect with the pedestal, and the headlamp as lighting source is connected on the pedestal；The mechanical arm
And the manipulator is located at the side of the conveyer belt；The upper end of the collimation cylinder is equipped with optical fiber interface, the laser
Bonding machine is connect by optical fiber with the optical fiber interface.
2. battery core automatic welding detection device according to claim 1, which is characterized in that the welding camera lens and the bat
Take the photograph the both ends that camera lens is located at the pedestal.
3. battery core automatic welding detection device according to claim 2, which is characterized in that the collimation cylinder and the pedestal
Between be connected with collimation microscope group, after laser is by the collimation cylinder, via collimation microscope group be transmitted to the coated reflection microscope group.
4. battery core automatic welding detection device according to claim 3, which is characterized in that the welding camera lens includes successively
The laser condensing lens of connection protect eyeglass, mirror sleeve and mirror cover, the mirror sleeve to be connect with the pedestal by counter flange.
5. battery core automatic welding detection device according to any one of claims 1 to 4, which is characterized in that the plated film is anti-
Penetrate microscope group include two metallic-membrane plating reflectors, the reflecting surface of two metallic-membrane plating reflectors is parallel, and with pedestal bottom edge angle at 45 °,
One end of the metallic-membrane plating reflector is connect with the madial wall of the pedestal respectively.
6. battery core automatic welding detection device according to claim 1, which is characterized in that the battery core automatic welding detection
Device further includes industrial personal computer, display, driver, image pick-up card and alarm, the driver, industrial camera, welding
Camera lens, display, alarm, image pick-up card and the laser-beam welding machine are connect with the industrial personal computer respectively.
7. the visible detection method of battery core automatic welding detection device, the method has used the battery core described in claim 6 certainly
Dynamic welding detection device, which is characterized in that the detection method includes：
S1, welding shooting acquisition both sides tab welding position is carried out to battery core both sides lug respectively by " welding-shooting " sequence
Image；
S2, extract described image anchor point position data；
S3, judge described image anchor point position whether with set by the qualified cell polar ear of welding as examination criteria
Reference position overlaps, if misaligned, enters S4 steps, if overlapping, enters S5 steps；
S4, its offset is calculated by the image data of shooting, carry out position correction, and enter S5 steps；
S5, on the basis of the anchor point of described image, described image is split, the model in segmentation area solder joint melting zone is obtained
It encloses, radius and area, average gray value, mean contrast value, position of centre of gravity, horizontal continuity degree, vertical continuous degree, as each point
The characteristic parameter for cutting area's solder joint, into S6 steps；
S6, judge whether the characteristic parameter of each cut section solder joint of two lugs of battery core is qualified, if qualified, enter S8 and walk
Suddenly；
S7, battery core welding are unqualified, and industrial personal computer is additional not to be conformed to case marking, explanation and export removal instruction, and manipulator is moved out
Assembly line；
S8, Technical innova- tion system MES carry out data statistics, complete a round of visits.
8. the visible detection method of battery core automatic welding detection device according to claim 7, which is characterized in that judge electricity
The method of the characteristic parameter of each cut section solder joint of two lugs of core, if the solder joint melting zone radius in each region of described image and
Area, average gray value, mean contrast value, center-of-gravity value, horizontal continuity angle value, vertical continuous angle value are qualified, then the battery core
Corresponding tab welding is qualified, and the tab welding of the only qualified battery core of both sides tab welding is just qualified, otherwise battery core pole
Ear welding is unqualified；For welding underproof battery core, industrial personal computer adds unqualified explanation and exports removal instruction, and manipulator will
It removes assembly line, and MES carries out data statistics.
9. the visible detection method of battery core automatic welding detection device according to claim 8, which is characterized in that described to press
" welding-shooting " sequence carries out the step of welding shooting obtains the image at both sides tab welding position to battery core both sides lug respectively
Before, further include：
Before on-line checking, by the both sides tab welding region by examining, assert the qualified battery core of welding using anchor point as base
Standard is individually positioned on welding position, is taken pictures to its welding region, is obtained standard picture and is extracted its characteristic ginseng value, deposits
It is stored in database, the standard as judgement.
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