CN209327241U - Laser Welding protects the defect detecting device of eyeglass, module - Google Patents
Laser Welding protects the defect detecting device of eyeglass, module Download PDFInfo
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- CN209327241U CN209327241U CN201821951484.8U CN201821951484U CN209327241U CN 209327241 U CN209327241 U CN 209327241U CN 201821951484 U CN201821951484 U CN 201821951484U CN 209327241 U CN209327241 U CN 209327241U
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- laser
- industrial camera
- eyeglass
- protection eyeglass
- detection
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Abstract
The utility model discloses a kind of defect detecting device of Laser Welding protection eyeglass, module, and device includes reflective mirror, industrial camera, shell and processor；When detection, reflective mirror can be by the instruction laser reflection of Laser Welding to industrial camera；Industrial camera is set as receiving incident light, obtains detection image；Processor is by judging that the feature of detection image judges to protect whether eyeglass needs replacing；The technical solution can also be made into the module being integrated in laser welding gun, not need installation reflective mirror, directly laser reflection will be indicated to industrial camera from protection eyeglass；Industrial camera is set as receiving incident light, obtains detection image；Technical solution provided by the utility model is directly using the inside optical path in laser welding gun as illumination light; eliminate the design of external light source; also the focal length of industrial camera, angle, working distance are designed; enable the region to be measured of viewing field of camera covering protection eyeglass whole, detection range increases.
Description
Technical field
The utility model relates to optical designs and field of visual inspection, and in particular to lack to a kind of Laser Welding protection eyeglass
Fall into detection device, module.
Background technique
Laser welding has compared with conventional soldering techniques in welding precision, efficiency, reliability, automation everyway
Unrivaled superiority, laser welding techniques are widely used in manufacturing industry now, especially in Precision Machining manufacture,
Such as the punching press of automobile production, be welded, coating, general assembly four mass production techniques in, the body quality being welded involves the outer of vehicle body
The complexity of sight, quality and general assembly assembly, therefore, the production technology that is welded plays a part of to form a connecting link in four big techniques.
Fig. 1 is laser welding gun structural schematic diagram, is darkroom enclosed construction inside laser welding gun, and internal optical path is vacuum shape
State, external dust, splash enter inside welding gun in order to prevent, and protection eyeglass is provided at plumb joint, before protecting eyeglass
End is provided with smaller loophole.
High temperature in laser welding gun when operation can generate " spark " splashing, and splash can be adhered to laser welding head to randomness
Interior protective glass on piece, causes the optical path of laser beam to be obstructed, and causes the decline of welding quality.In response to this problem, existing method is
The worker of line downstream carries out artificial detection, protects the method for eyeglass by manual inspection laser welding head to prevent because protecting
The welding accident of protecting lens defect and bad student, but manual detection efficiency is low and is unfavorable for the automation of production line, another kind solution
Certainly scheme is the repair rate in order to reduce welding workpiece, and spare no expense cost, and no matter laser welding head protective glass is with the presence or absence of scarce
Fall into and all regularly replace its protection eyeglass, there are problems: 1) cost of periodic replacement laser welding head protection eyeglass is than artificial
It checks high.2) optical path is vacuum state inside laser welding head, and being replaced as frequently as unpacking replacement protective glass sector-meeting keeps dust etc. miscellaneous
Matter enters, and then influences laser in the conductibility of internal optical path.
How effectively to detect in laser beam welding, the real time status of eyeglass protected to become urgent problem to be solved,
CN107643296A provides a kind of detection method of coaxial optical illumination, as shown in Fig. 2, the detection method needs that axis light is arranged
It irradiating into protection eyeglass, camera acquires irradiation area, and external coaxial light source increases the complexity of detection system, meanwhile, measurement
Visual field is protected the limitation of eyeglass front end light transmission pore size, and light transmission pore size is small, therefore the incident light of coaxial light source projects
It protects the area of eyeglass to be less than the practical area to be tested of protection eyeglass, cannot achieve pair using the detection method of coaxial optical illumination
Protect the detection of whole area to be tested of eyeglass.
Summary of the invention
In order to solve the above-mentioned technical problem, the utility model provide a kind of Laser Welding protection eyeglass defect detecting device,
Module；
Technical solution is as follows:
A kind of defect detecting device of Laser Welding protection eyeglass, it is characterised in that including reflective mirror, industrial camera, shell and
Processor；The reflective mirror, industrial camera are mounted on the enclosure interior, and the processor is mounted on the enclosure interior or outer
Portion；
When detection, the reflective mirror can be by the instruction laser reflection of the Laser Welding to the industrial camera；
The industrial camera is set as receiving incident light, obtains detection image；
It is β, 10 ° of 80 ° of < β <, in order to protect that the reflective mirror and instruction laser, which pass through the angle of the optical axis after protection eyeglass,
Card industrial camera can connect the complete image for collecting the laser facula region of the instruction after being reflected, the optical axis of the industrial camera
The angle of optical axis after passing through protection eyeglass with instruction laser is 2 β；
The lens focus of the industrial camera isWherein, D2For the industrial camera target surface it is short
The length on side, θ1Emergent light corresponding to the point of the edge of hot spot and instruction laser light are formed in protective glass on piece for instruction laser
The angle of axis direction,D1Diameter for instruction laser projection in the spot area of protective glass on piece, d1It is
Protect eyeglass to the distance of pad；
When detection, the distance of camera lens to the protection eyeglass of the industrial camera is
Collected detection image is transmitted to the processor by the industrial camera and intercommunication of processors；It is described
Processor is calculated according to detection image, judges the protective glass on piece with the presence or absence of bad point.
It is preferred that 30 ° of 60 ° of < β <.
Further, the structure of camera lens-adaptive laser optic (ALO) is brazed according to adaptive adjustable laser,
In the utility model, the laser welding gun internal structure description are as follows: be disposed with laser, collimator and extender eyeglass
Group, focusing lens group and protection eyeglass；Optical path when detection are as follows: laser issues instruction laser, collimated to expand lens set standard
Directly, focusing lens group focuses, and forms hot spot in protective glass on piece；
Laser beam inside laser welder in optical path includes the sightless infrared laser of naked eyes and macroscopic finger
Show laser, infrared laser is for heating face of weld, and the instruction laser is for prompting staff's laser welding
Location point will affect the quality of entire laser welding when protecting stain existing for eyeglass to hinder, block infrared laser optical path,
Therefore it is region to be measured that infrared laser, which is incident upon the spot area of protective glass on piece,；It is designed according to laser welding gun interior lights road,
Infrared laser and instruction laser projection are consistent in the spot size of protective glass on piece；Protect eyeglass that there is infrared laser high saturating
Property, and a part of light for indicating laser is reflected, a part transmission, the light of the reflection or transmission will be by as protection eyeglass detection
Illumination light.
The instruction laser that this method is carried using laser welding carries out the defect situation of protection eyeglass as lighting source
Vision-based detection, without external light source and detection image being capable of the region irradiated by laser beam of covering protection eyeglass；
Further, when detection, negative lens is additionally provided between the protection eyeglass and focusing lens group, the negative lens
Focal length fIt is negativeIt is calculated according to the following formula:
Wherein: D3For the collimated diameter for expanding the hot spot formed after lens set in refocusing lens set of instruction laser； d3
The distance between negative lens is arrived for the focusing lens group；fIt is poly-For the focal length of the focusing lens group；DIncreaseFor artificial preset guarantor
The diameter in the region to be measured on protecting lens protects optic diameter >=DIncrease>D1。
It further, further include motor and regulating mechanism, the motor drives regulating mechanism to adjust the collimator and extender eyeglass
Group, focusing lens group, the position/angles of protection eyeglass, negative lens.
When the protection eyeglass of laser welder is located at detection position, controller will be collimated by instruction control motor work
It expands lens set, focusing lens group, protection eyeglass and negative lens and is adjusted to default installation site/angle respectively, to expand instruction
Spot diameter of the laser projection in protective glass on piece.
Following another technical solutions provided by the utility model, no setting is required reflective mirror are directly right using protection eyeglass
Instruction laser is reflected, and the program can be integrated in inside laser welding gun.
A kind of defects detection module of Laser Welding protection eyeglass, including the protection eyeglass being set in laser welding gun and work
Industry camera, and it is set to the processor inside or outside laser welding gun；
The angle of the optical axis of the Laser Welding protection eyeglass and instruction laser is γ, 10 ° of 80 ° of < γ <；The industry phase
The angle of the optical axis of the optical axis and instruction laser of machine is 2 γ；
The Laser Welding protection eyeglass will indicate laser reflection to the industrial camera；The industrial camera is set as receiving
Incident light obtains detection image；
The lens focus of the industrial camera isWherein, D2For the industrial camera target surface it is short
The length on side, θ1Emergent light corresponding to the point of the edge of hot spot and instruction laser light are formed in protective glass on piece for instruction laser
The angle of axis direction,D1Diameter for instruction laser projection in the spot area of protective glass on piece, d1It is
Protect eyeglass to the distance of pad；
When detection, the distance of camera lens to the protection eyeglass of the industrial camera is
Collected detection image is transmitted to the processor by the industrial camera and intercommunication of processors；It is described
Processor is calculated according to detection image, judges the protective glass on piece with the presence or absence of bad point.
It is preferred that 30 ° of 60 ° of < γ <.
Further, be disposed with inside the laser welding gun laser, collimator and extender lens set, focusing lens group and
Protect eyeglass；Optical path when detection are as follows: laser issues instruction laser, and collimated to expand lens set collimation, focusing lens group poly-
Coke forms hot spot in protective glass on piece；
It is characterized by: negative lens is additionally provided between the protection eyeglass and focusing lens group when detection, it is described negative saturating
The focal length f of mirrorIt is negativeIt is calculated according to the following formula:
Wherein: D3To indicate the collimated diameter for expanding the hot spot formed in focusing lens group after lens set of laser； d3
The distance between negative lens is arrived for the focusing lens group；fIt is poly-For the focal length of the focusing lens group；DIncreaseFor artificial preset guarantor
The diameter in the region to be measured on protecting lens protects optic diameter >=DIncrease>D1。
It further, further include motor and regulating mechanism, the motor drives regulating mechanism to adjust the collimator and extender eyeglass
Group, focusing lens group, the position/angles of protection eyeglass, negative lens.
When the protection eyeglass of Laser Welding is located at detection position, controller is expanded collimation by instruction control motor work
Beam lens set, focusing lens group, protection eyeglass and negative lens are adjusted to default installation site/angle respectively, are swashed with expanding instruction
Spot diameter of the light projection in protective glass on piece.
Utility model device, module include the following steps: the defect inspection method of Laser Welding protection eyeglass
1) the instruction laser of Laser Welding is collimated expands lens set collimation, the focusing of focusing lens group, and then part is through guarantor
Protecting lens indicate that laser forms hot spot in the protective glass on piece partially by protection lens reflecting；
2) the transmission light of the protection eyeglass is imaged by being captured after mirror reflection by industrial camera, obtains detection figure
Picture；
It is β, 10 ° of 80 ° of < β <, the work that the reflective mirror and instruction laser, which pass through the angle of the optical axis after protection eyeglass,
It is 2 β that the optical axis and instruction laser of industry camera, which pass through the angle of the optical axis after protection eyeglass,；
The lens focus of the industrial camera isWherein, D2For the industrial camera target surface it is short
The length on side, θ1Emergent light corresponding to the point of the edge of hot spot and instruction laser light are formed in protective glass on piece for instruction laser
The angle of axis direction,D1Diameter for instruction laser projection in the spot area of protective glass on piece, d1
It is to protect eyeglass to the distance of pad；
When detection, the distance of camera lens to the protection eyeglass of the industrial camera is
Collected detection image is transmitted to the processor by the industrial camera and intercommunication of processors；It is described
Processor is calculated according to detection image, judges the protective glass on piece with the presence or absence of bad point；
Alternatively, the reflected light of the protection eyeglass is captured by industrial camera, it is imaged, obtains detection image；
The angle of the optical axis of the Laser Welding protection eyeglass and instruction laser is γ, 10 ° of 80 ° of < γ <；The industry phase
The angle of the optical axis of the optical axis and instruction laser of machine is 2 γ；
The lens focus of the industrial camera isWherein, D2For the industrial camera target surface it is short
The length on side, θ1Emergent light corresponding to the point of the edge of hot spot and instruction laser light are formed in protective glass on piece for instruction laser
The angle of axis direction,D1Diameter for instruction laser projection in the spot area of protective glass on piece, d1It is
Protect eyeglass to the distance of pad；
When detection, the distance of camera lens to the protection eyeglass of the industrial camera is
Collected detection image is transmitted to the processor by the industrial camera and intercommunication of processors；It is described
Processor is calculated according to detection image, judges the protective glass on piece with the presence or absence of bad point.
It is preferred that 30 ° of 60 ° of < β <, 30 ° of 60 ° of < γ <.
Technical solution provided by the utility model has the advantage that
1) itself structure optical path of laser welding industrial environment and welding gun is combined, directly using in laser welding gun
Illumination light of the internal optical path as protection eyeglass region detection to be measured eliminates design, the installation of external light source, easy to use；
2) focal length, angle, the working distance for designing camera, enable the whole area to be measured of viewing field of camera covering protection eyeglass
Domain carries out image analysis by processor, realizes that exploitativeness is strong, compared to existing skill to the automatic detection of protection eyeglass
Art detection range increases, and may be implemented to the protection region-wide detection of eyeglass.
Detailed description of the invention
Fig. 1 is laser welding gun structural schematic diagram；
Fig. 2 is prior art structural schematic diagram；
Fig. 3 is 1 structural schematic diagram of the utility model embodiment；
Fig. 4 is 2 structural schematic diagram of the utility model embodiment；
Fig. 5 is 3 structural schematic diagram of the utility model embodiment；
Fig. 6 is 4 structural schematic diagram of the utility model embodiment；
Fig. 7 is 5 structural schematic diagram of the utility model embodiment.
In figure: 11 lasers, 12 collimator and extender lens sets, 13 focusing lens groups, 14 protection eyeglasses, 15 reflecting mirrors, 16 works
Welding wire mechanism, 19 welding planes, 20 negative lenses, 21 processors are sent in industry camera, 17 loopholes, 18.
Specific embodiment
The technical solution of the utility model is described in detail below in conjunction with drawings and examples.
Embodiment 1
As shown in figure 3, a kind of defect detecting device of Laser Welding protection eyeglass, it is characterised in that including reflective mirror 15, work
Industry camera 16, shell and processor；Inside housings, processor 21 is mounted on outside shell for reflective mirror 15, the installation of industrial camera 16
Portion；
Laser 11, collimator and extender lens set 12, focusing lens group 13 and protection are disposed with inside laser welding gun
Eyeglass 14；Optical path when detection are as follows: laser 11 issues instruction laser, collimated to expand the collimation of lens set 12, focusing lens group
13 focus, and form hot spot on protection eyeglass 14；
When detection, reflective mirror 15 can be by the instruction laser reflection of Laser Welding to industrial camera 16；
Industrial camera 16 is set as receiving incident light, obtains detection image；
In the present embodiment, the angle of the optical axis of reflective mirror 15 and instruction laser after protection eyeglass 14 is β=45 °, work
It is 2 β=90 ° that the optical axis and instruction laser of industry camera, which pass through the angle of the optical axis after protection eyeglass,；
The lens focus of industrial camera 16 isWherein, D2For the short side of the target surface of industrial camera 16
Length, θ1Emergent light corresponding to the point of the edge of hot spot and instruction laser beam axis are formed on protecting eyeglass 14 for instruction laser
The angle in direction,D1Diameter for instruction laser projection in the spot area of protective glass on piece, d1It is to protect
Protecting lens 14 arrive the distance of pad；
When detection, the distance of camera lens to the protection eyeglass 14 of industrial camera 16 is
Industrial camera 16 and processor 21 mutually communicate, and collected detection image is transmitted to processor 21；Processor
It is calculated according to detection image, judges protective glass on piece with the presence or absence of bad point.
The detecting step of the present embodiment is as follows:
1) the instruction laser of Laser Welding is collimated expands the collimation of lens set 12, the focusing of focusing lens group 13, and then part is saturating
Overprotection eyeglass 14 is partially reflected by protection eyeglass 14, and instruction laser forms hot spot in protective glass on piece；
2) it protects passing through after reflective mirror 15 reflects through light for eyeglass 14 to be captured by industrial camera 16, is imaged, is detected
Image；
3) collected detection image is transferred to processor 21 by industrial camera 16, and processor 21 carries out figure to detection image
As processing, it whether there is stain in analysis detection image, it is high to the transmitance of instruction laser, entire when protecting eyeglass normal
Brightness of image is high；When protective glass on piece has pollutant or slight crack, Polluted area plays the role of blocking to instruction laser, then protects
The corresponding brightness of image of Polluted area is low on eyeglass, judges that detection image at this time is abnormal, needs replacing.
Embodiment 2
As shown in figure 4, the present embodiment increases negative lens 20 on the structure of embodiment 1；
Specifically: a kind of defect detecting device of Laser Welding protection eyeglass, including reflective mirror 15, industrial camera 16, shell
With processor 21；Inside housings, processor 21 is mounted on hull outside for reflective mirror 15, the installation of industrial camera 16；
Negative lens, the focal length f of negative lens are additionally provided between protection eyeglass and focusing lens groupIt is negativeIt is counted according to the following formula
It calculates:
Wherein: D3To indicate the collimated diameter for expanding the hot spot formed in focusing lens group after lens set of laser； d3
The distance between negative lens is arrived for focusing lens group；fIt is poly-For the focal length of focusing lens group；DIncreaseFor artificial preset protective glass on piece
Region to be measured diameter, protect optic diameter >=DIncrease>D1。
Laser 11, collimator and extender lens set 12,13 negative lens of focusing lens group are disposed with inside laser welding gun
20 and protection eyeglass 14；Optical path when detection are as follows: laser 11 issues instruction laser, collimated to expand the collimation of lens set 12, gather
Focus lens group 13 focuses, and negative lens 20 increases facula area, forms hot spot on protection eyeglass 14；
When detection, reflective mirror 15 can be by the instruction laser reflection of Laser Welding to industrial camera 16；
Industrial camera 16 is set as receiving incident light, obtains detection image；
In the present embodiment, the angle of the optical axis of reflective mirror 15 and instruction laser after protection eyeglass 14 is β=45 °, work
It is 2 β=90 ° that the optical axis and instruction laser of industry camera, which pass through the angle of the optical axis after protection eyeglass,；
The lens focus of industrial camera 16 isWherein, D2For the short side of the target surface of industrial camera 16
Length, θ1Emergent light corresponding to the point of the edge of hot spot and instruction laser beam axis are formed on protecting eyeglass 14 for instruction laser
The angle in direction,d1It is the distance for protecting eyeglass 14 to arrive pad；
When detection, the distance of camera lens to the protection eyeglass 14 of industrial camera 16 is
Industrial camera 16 and processor 21 mutually communicate, and collected detection image is transmitted to processor 21；Processor
It is calculated according to detection image, judges protective glass on piece with the presence or absence of bad point.
Embodiment 3
As shown in figure 5, no setting is required in the present embodiment reflective mirror, directly carries out instruction laser using protection eyeglass anti-
It penetrates；
It is specific as follows:
A kind of defects detection module of Laser Welding protection eyeglass, including 14 He of protection eyeglass being set in laser welding gun
Industrial camera 16, and it is set to the processor 21 outside laser welding gun；
Laser 11, collimator and extender lens set 12, focusing lens group 13 and protection are disposed with inside laser welding gun
Eyeglass 14；Optical path when detection are as follows: laser 11 issues instruction laser, collimated to expand the collimation of lens set 12, focusing lens group
13 focus, and form hot spot on protection eyeglass 14；
Laser Welding protects eyeglass 14 and indicates that the angle of the optical axis of laser is γ=30 °；The optical axis and finger of industrial camera 16
The angle for showing the optical axis of laser is 2 γ=60 °；
Laser Welding protects eyeglass 14 that laser reflection will be indicated to industrial camera 16；Industrial camera 16 is set as receiving incident
Light obtains detection image；
The lens focus of industrial camera 16 isWherein, D2For the short side of the target surface of industrial camera 16
Length, θ1Emergent light corresponding to the point of the edge of hot spot and instruction laser beam axis are formed on protecting eyeglass 14 for instruction laser
The angle in direction,D1Diameter for instruction laser projection in the spot area of protective glass on piece, d1It is to protect
Protecting lens 14 arrive the distance of pad；
When detection, the distance of camera lens to the protection eyeglass 14 of industrial camera 16 is
Industrial camera 16 and processor 21 mutually communicate, and collected detection image is transmitted to processor 21；Processor
It is calculated according to detection image, judges to protect on eyeglass 14 with the presence or absence of bad point.
The detecting step of the present embodiment is as follows:
The instruction laser of Laser Welding is collimated to expand the collimation of lens set 12, the focusing of focusing lens group 13, and then part penetrates
Eyeglass 14 is protected, is partially reflected by protection eyeglass 14, instruction laser forms hot spot in protective glass on piece；
The reflected light of protection eyeglass 14 is captured by industrial camera, is imaged, is obtained detection image；
When detection, the distance of camera lens to the protection eyeglass of industrial camera 16 is
Industrial camera 16 and processor 21 mutually communicate, and collected detection image is transmitted to processor 21；Processor
It is calculated according to detection image, judges to protect on eyeglass 14 with the presence or absence of bad point.
Embodiment 4
As shown in fig. 6, Laser Welding protects eyeglass 14 and indicates that the angle of the optical axis of laser is γ=60 ° in the present embodiment；
The angle of the optical axis of the optical axis and instruction laser of industrial camera 16 is 2 γ=120 °；
Specifically:
A kind of defects detection module of Laser Welding protection eyeglass, including 14 He of protection eyeglass being set in laser welding gun
Industrial camera 16, and it is set to the processor 21 outside laser welding gun；
Laser 11, collimator and extender lens set 12, focusing lens group 13 and protection are disposed with inside laser welding gun
Eyeglass 14；Optical path when detection are as follows: laser 11 issues instruction laser, collimated to expand the collimation of lens set 12, focusing lens group
13 focus, and form hot spot on protection eyeglass 14；
Laser Welding protects eyeglass 14 that laser reflection will be indicated to industrial camera 16；Industrial camera 16 is set as receiving incident
Light obtains detection image；
The lens focus of industrial camera 16 isWherein, D2For the short side of the target surface of industrial camera 16
Length, θ1Emergent light corresponding to the point of the edge of hot spot and instruction laser beam axis are formed on protecting eyeglass 14 for instruction laser
The angle in direction,D1Diameter for instruction laser projection in the spot area of protective glass on piece, d1It is to protect
Protecting lens 14 arrive the distance of pad；
When detection, the distance of camera lens to the protection eyeglass 14 of industrial camera 16 is
Industrial camera 16 and processor 21 mutually communicate, and collected detection image is transmitted to processor 21；Processor
It is calculated according to detection image, judges to protect on eyeglass 14 with the presence or absence of bad point.
The detecting step of the present embodiment is as follows:
The instruction laser of Laser Welding is collimated to expand the collimation of lens set 12, the focusing of focusing lens group 13, and then part penetrates
Eyeglass 14 is protected, is partially reflected by protection eyeglass 14, instruction laser is formed with hot spot on protection eyeglass 14；
The reflected light of protection eyeglass 14 is captured by industrial camera 16, is imaged, is obtained detection image；
When detection, the distance of camera lens to the protection eyeglass of industrial camera 16 is
Industrial camera 16 and processor 21 mutually communicate, and collected detection image is transmitted to processor 21；Processor
21 are calculated according to detection image, judge protective glass on piece with the presence or absence of bad point.
Embodiment 5
As shown in fig. 7, Laser Welding protects eyeglass 14 and indicates that the angle of the optical axis of laser is γ=45 ° in the present embodiment；
The angle of the optical axis of the optical axis and instruction laser of industrial camera 16 is 2 γ=90 °；And between protection eyeglass and focusing lens group
It is additionally provided with negative lens；
Concrete scheme is as follows:
A kind of defects detection module of Laser Welding protection eyeglass, including 14 He of protection eyeglass being set in laser welding gun
Industrial camera 16, and it is set to the processor 21 outside laser welding gun；
And negative lens is additionally provided between protection eyeglass and focusing lens group；
The focal length f of negative lensIt is negativeIt is calculated according to the following formula:
Wherein: D3To indicate the collimated diameter for expanding the hot spot formed in focusing lens group after lens set of laser； d3
The distance between negative lens is arrived for focusing lens group；fIt is poly-For the focal length of focusing lens group；DIncreaseFor artificial preset protective glass on piece
Region to be measured diameter, protect optic diameter >=DIncreaseThe diameter of > protective glass on piece formation hot spot.
Further, motor and regulating mechanism can also be increased, motor drives regulating mechanism to adjust collimator and extender lens set, gather
The position/angles of focus lens group, protection eyeglass, negative lens.
When the protection eyeglass of Laser Welding is located at detection position, controller is expanded collimation by instruction control motor work
Beam lens set, focusing lens group, protection eyeglass and negative lens are adjusted to default installation site/angle respectively, are swashed with expanding instruction
Spot diameter of the light projection in protective glass on piece.
Optical path when detection are as follows: laser 11 issues instruction laser, collimated to expand the collimation of lens set 12, focusing lens group
13 focus, and negative lens 20 increases facula area, form hot spot on protection eyeglass 14；
Laser Welding protects eyeglass 14 that laser reflection will be indicated to industrial camera 16；Industrial camera 16 is set as receiving incident
Light obtains detection image；
The lens focus of industrial camera 16 isWherein, D2For the short side of the target surface of industrial camera 16
Length, θ1Emergent light corresponding to the point of the edge of hot spot and instruction laser beam axis are formed on protecting eyeglass 14 for instruction laser
The angle in direction,d1It is the distance for protecting eyeglass 14 to arrive pad；
When detection, the distance of camera lens to the protection eyeglass 14 of industrial camera 16 is
Industrial camera 16 and processor 21 mutually communicate, and collected detection image is transmitted to processor 21；Processor
It is calculated according to detection image, judges to protect on eyeglass 14 with the presence or absence of bad point.
The detecting step of the present embodiment is as follows:
The instruction laser of Laser Welding is collimated to expand the collimation of lens set 12, the focusing of focusing lens group 13, and negative lens 20 increases
Facula area, then part is partially reflected by protection eyeglass 14 through protection eyeglass 14, and instruction laser is formed in protective glass on piece
There is hot spot；
The reflected light of protection eyeglass 14 is captured by industrial camera 16, is imaged, is obtained detection image；
When detection, the distance of camera lens to the protection eyeglass 14 of industrial camera 16 is
Industrial camera 16 and processor 21 mutually communicate, and collected detection image is transmitted to processor 21；Processor
21 are calculated according to detection image, judge protective glass on piece with the presence or absence of bad point.
For ease of explanation and precise definition of the appended claims, term " on ", "lower", "inner" and "outside" be used to refer to
The position of these shown features describes the features of illustrative embodiments in attached drawing.
The description that the utility model specific exemplary embodiment is presented in front is for the purpose of illustration and description.
The description of front, which is not intended to become, to be not intended to the utility model is limited to disclosed accurate shape without missing
Formula, it is clear that much change according to the above instruction and variation is all possible.Select exemplary implementation scheme and be described be for
The certain principles and practical application for explaining the utility model, so that others skilled in the art can be realized simultaneously
Utilize the various exemplary implementation schemes of the utility model and its different selection forms and modification.The scope of the utility model
It is intended to be limited by the appended claims and its equivalent form.
Claims (8)
1. a kind of defect detecting device of Laser Welding protection eyeglass, it is characterised in that: including reflective mirror, industrial camera, shell and
Processor；The reflective mirror, industrial camera are mounted on the enclosure interior, and the processor is mounted on the enclosure interior or outer
Portion；
It is characterized by: the reflective mirror can be by the instruction laser reflection of Laser Welding to the industrial camera when detection；
The industrial camera is set as receiving incident light, obtains detection image；
The angle that the reflective mirror and instruction laser pass through the optical axis after protection eyeglass is β, 10 ° of 80 ° of < β <, the industry phase
It is 2 β that the optical axis and instruction laser of machine, which pass through the angle of the optical axis after protection eyeglass,；
The lens focus of the industrial camera isWherein, D2For the short side of the target surface of the industrial camera
Length, θ1Emergent light corresponding to the point of the edge of hot spot and instruction laser beam axis side are formed in protective glass on piece for instruction laser
To angle,D1Diameter for instruction laser projection in the spot area of protective glass on piece, d1It is protection
Distance of the eyeglass to pad；
When detection, the distance of camera lens to the protection eyeglass of the industrial camera is
Collected detection image is transmitted to the processor by the industrial camera and intercommunication of processors；The processing
Device is calculated according to detection image, judges the protective glass on piece with the presence or absence of bad point.
2. defect detecting device as described in claim 1, it is characterised in that: 30 ° of 60 ° of < β <.
3. defect detecting device as claimed in claim 1 or 2, it is characterised in that: be disposed with laser inside laser welding gun
Device, collimator and extender lens set, focusing lens group and protection eyeglass；Optical path when detection are as follows: laser issues instruction laser, through standard
Direct expansion beam lens set collimation, focusing lens group focus, and form hot spot in protective glass on piece；
When detection, negative lens, the focal length f of the negative lens are additionally provided between the protection eyeglass and focusing lens groupIt is negativeAccording to
Following formula is calculated:
Wherein: D3To indicate the collimated diameter for expanding the hot spot formed in focusing lens group after lens set of laser；d3It is described
Focusing lens group arrives the distance between negative lens；fIt is poly-For the focal length of the focusing lens group；DIncreaseFor artificial preset protection eyeglass
On region to be measured diameter, protect optic diameter >=DIncrease>D1。
4. defect detecting device as claimed in claim 3, it is characterised in that: further include motor and regulating mechanism, the motor band
Dynamic regulating mechanism adjusts the collimator and extender lens set, focusing lens group, the position/angles of protection eyeglass, negative lens.
5. a kind of defects detection module of Laser Welding protection eyeglass, including the protection eyeglass being set in laser welding gun and industry
Camera, and it is set to the processor inside or outside laser welder welding gun；
It is characterized by: the angle of the optical axis of the Laser Welding protection eyeglass and instruction laser is γ, 10 ° of 80 ° of < γ <；It is described
The angle of the optical axis of the optical axis and instruction laser of industrial camera is 2 γ；
The Laser Welding protection eyeglass will indicate laser reflection to the industrial camera；The industrial camera is set as receiving incident
Light obtains detection image；
The lens focus of the industrial camera isWherein, D2For the short side of the target surface of the industrial camera
Length, θ1Emergent light corresponding to the point of the edge of hot spot and instruction laser beam axis side are formed in protective glass on piece for instruction laser
To angle,D1Diameter for instruction laser projection in the spot area of protective glass on piece, d1It is protection
Distance of the eyeglass to pad；
When detection, the distance of camera lens to the protection eyeglass of the industrial camera is
Collected detection image is transmitted to the processor by the industrial camera and intercommunication of processors；The processing
Device is calculated according to detection image, judges the protective glass on piece with the presence or absence of bad point.
6. defects detection module as claimed in claim 5, it is characterised in that: 30 ° of 60 ° of < γ <.
7. the defects detection module as described in claim 5 or 6, it is characterised in that: be disposed with laser inside laser welding gun
Device, collimator and extender lens set, focusing lens group and protection eyeglass；Optical path when detection are as follows: laser issues instruction laser, through standard
Direct expansion beam lens set collimation, focusing lens group focus, and form hot spot in protective glass on piece；
When detection, negative lens, the focal length f of the negative lens are additionally provided between the protection eyeglass and focusing lens groupIt is negativeAccording to
Following formula is calculated:
Wherein: D3To indicate the collimated diameter for expanding the hot spot formed in focusing lens group after lens set of laser；d3It is described
Focusing lens group arrives the distance between negative lens；fIt is poly-For the focal length of the focusing lens group；DIncreaseFor artificial preset protection eyeglass
On region to be measured diameter, protect optic diameter >=DIncrease>D1。
8. defects detection module as claimed in claim 7, it is characterised in that: further include motor and regulating mechanism, the motor band
Dynamic regulating mechanism adjusts the collimator and extender lens set, focusing lens group, the position/angles of protection eyeglass, negative lens.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821951484.8U CN209327241U (en) | 2018-11-26 | 2018-11-26 | Laser Welding protects the defect detecting device of eyeglass, module |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821951484.8U CN209327241U (en) | 2018-11-26 | 2018-11-26 | Laser Welding protects the defect detecting device of eyeglass, module |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109211939A (en) * | 2018-11-26 | 2019-01-15 | 易思维（杭州）科技有限公司 | Defect detecting device, module and the detection method of Laser Welding protection eyeglass |
| CN110744213A (en) * | 2019-10-30 | 2020-02-04 | 中国航空制造技术研究院 | In-situ monitoring device and method for pollution of welding laser head protective lens |
| CN117571709A (en) * | 2024-01-15 | 2024-02-20 | 武汉东泰盛机械有限公司 | Automatic arc welding production line detection device |
-
2018
- 2018-11-26 CN CN201821951484.8U patent/CN209327241U/en not_active Withdrawn - After Issue
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109211939A (en) * | 2018-11-26 | 2019-01-15 | 易思维（杭州）科技有限公司 | Defect detecting device, module and the detection method of Laser Welding protection eyeglass |
| CN109211939B (en) * | 2018-11-26 | 2023-09-08 | 易思维（杭州）科技有限公司 | Defect detection device, module and detection method for laser welding protective lens |
| CN110744213A (en) * | 2019-10-30 | 2020-02-04 | 中国航空制造技术研究院 | In-situ monitoring device and method for pollution of welding laser head protective lens |
| CN117571709A (en) * | 2024-01-15 | 2024-02-20 | 武汉东泰盛机械有限公司 | Automatic arc welding production line detection device |
| CN117571709B (en) * | 2024-01-15 | 2024-04-02 | 武汉东泰盛机械有限公司 | Automatic arc welding production line detection device |
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