CN107377530A - Laser spot control system and its application, laser cleaning head - Google Patents
Laser spot control system and its application, laser cleaning head Download PDFInfo
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- CN107377530A CN107377530A CN201710617939.6A CN201710617939A CN107377530A CN 107377530 A CN107377530 A CN 107377530A CN 201710617939 A CN201710617939 A CN 201710617939A CN 107377530 A CN107377530 A CN 107377530A
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- laser
- display unit
- control system
- range finder
- spot control
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B7/00—Cleaning by methods not provided for in a single other subclass or a single group in this subclass
- B08B7/0035—Cleaning by methods not provided for in a single other subclass or a single group in this subclass by radiant energy, e.g. UV, laser, light beam or the like
- B08B7/0042—Cleaning by methods not provided for in a single other subclass or a single group in this subclass by radiant energy, e.g. UV, laser, light beam or the like by laser
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B13/00—Accessories or details of general applicability for machines or apparatus for cleaning
-
- 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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- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Laser Beam Processing (AREA)
Abstract
This application discloses a kind of laser spot control system, the laser spot control system includes laser range finder, field lens and calculates display unit；The distance measuring laser beams that the laser range finder is sent are by being irradiated to workpiece surface and ranging after the field lens；The laser range finder electrically connects with the calculating display unit, the laser range finder and the calculating display unit input distance measurement result, and exports at least one signal by the calculating display unit.The system can monitor defocus distance in real time, and it is applied to laser cleaning field, can realize the cleaning of contactless laser cleaning, especially narrow space, improves the quality and efficiency of cleaning.This application discloses the application of above-mentioned laser spot control system and laser cleaning head.
Description
Technical field
The application is related to a kind of laser spot control system and its application and laser spot control system and application, laser
Cleaning head, belong to laser field.
Background technology
With the continuous development of science and technology, laser is constantly applied to the every field such as the processing, manufacture and cleaning of material,
Wherein, laser cleaning technique is a kind of green cleaning technique, is applied in fields such as Aero-Space, precision optical machinery, hardware
Have a extensive future.And Handheld laser cleaning equipment with its is flexible, facilitate the characteristics of, turn into the master of following laser cleaning equipment development
Stream.Handheld laser cleaning head is the core component of the equipment.Because laser cleaning is that hot spot completes dirt after utilizing Laser Focusing
The removal of stain, cleaning hot spot defocus, which crosses conference, causes cleaning performance bad, it is therefore necessary to which cleaning hot spot is controlled near focal point.
Because human hand can constantly fluctuate in cleaning process, and the defocus situation for cleaning hot spot can not be judged by naked eyes,
Therefore cleaning performance is not good enough, it is necessary to cleaning is repeated several times, and causes the waste of manpower and the energy.In order to ensure cleaning workpiece in focus
Near, method the most frequently used at present is to add an idler wheel mechanism on hand-held cleaning head, and roller is transported in workpiece surface to be cleaned
It is dynamic, it is ensured that focus is all the time in workpiece surface.But due to being influenceed by roller, this cleaning head can not realize narrow space
Cleaning, and cleaning process is contact, can not meet the cleaning of the product of particular/special requirement.
The content of the invention
According to the one side of the application, there is provided a kind of laser spot control system, the system can monitor in real time from
Defocus distance, it is applied to laser cleaning field, can realize the cleaning of contactless laser cleaning, especially narrow space,
Improve the quality and efficiency of cleaning.
The laser spot control system includes laser range finder, field lens and calculates display unit；
The distance measuring laser beams that the laser range finder is sent are by being irradiated to workpiece surface and ranging after the field lens；
The laser range finder electrically connects with the calculating display unit, and the laser range finder calculates display list with described
Member input distance measurement result, and at least one signal is exported by the calculating display unit.
In the application, the field lens refers to be operated near focal plane of lens, can effectively reduce the saturating of detector size
Mirror, also referred to as F-Theta mirrors or F- θ mirrors.
Preferably, the calculating display unit inputs distance measurement result and parameter preset by contrasting the laser range finder,
Whether within a preset range to export the distance measurement result.
Preferably, the display unit that calculates determines defocusing amount by contrasting the measurement distance obtained and setpoint distance.
Preferably, the display unit that calculates determines testing laser by contrasting the measurement distance obtained and setpoint distance
Focal position and the position for the treatment of laser treatment material it is whether suitable；
Preferably, the display unit that calculates is by showing different colors come the focal position of corresponding testing laser with treating
The position suitable of laser treatment material/improper.
Preferably, the display unit that calculates judges the focal position of testing laser and treats that the position of laser treatment material is closed
Suitable calculation criterion is-Δ F≤L- (L1+L2+F)≤ΔF；
Wherein, L is the distance for the actual measurement for calculating the acquisition in display unit；
F is the focal length of F-Theta mirrors；
Δ F is to complete the maximum defocus amount that laser treatment allows；
L1 is that laser range finder sends the distance between light beam with galvanometer system；
L2 is the distance between scanning galvanometer and F-Theta mirrors.
Preferably, the numerical value of F and the Δ F is set by calculating display unit.
As a preferred embodiment, distance measurement result of the laser range finder to the calculating display unit input
L meets L- (L0+ F) ＞ Δs F, calculating display unit first signal of output.
As a preferred embodiment, distance measurement result of the laser range finder to the calculating display unit input
L satisfactions-Δ F≤L- (L0+ F)≤Δ F, the calculating display unit output secondary signal.
As a preferred embodiment, distance measurement result of the laser range finder to the calculating display unit input
L meets L- (L0+ F) ＜-Δ F, calculating display unit the 3rd signal of output.
Wherein, F is the focal length of field lens；
Δ F is the maximum defocus amount of the default permission of laser spot control system；
L0Optical path distance between laser range finder and field lens.
It is further preferred that the first signal, secondary signal and the 3rd signal for calculating display unit output, by not
The forms of one or more combinations in color together, word, pattern distinctly display.
It is further preferred that laser spot control system system includes processing laser, scanning galvanometer and spectroscope；
The range laser that the processing laser that the processing laser is sent is sent with the laser range finder is by described point
Light microscopic is coupling in same light path, is passed sequentially through the scanning galvanometer and field lens and is irradiated to workpiece surface；
L0=L1+L2, wherein L1Optical path distance between laser range finder and scanning galvanometer, L2For scanning galvanometer and field lens
Between optical path distance.
Preferably, the laser spot control system includes wave filter, and the range laser that the laser range finder is sent is first
First pass through wave filter.
Preferably, the calculating display unit includes at least one digital logical operation unit.
According to further aspect of the application, there is provided at least one of above-mentioned laser spot control system is cut in laser
Cut, laser cleaning, laser surface texturing, laser welding, laser impact intensified, laser melting coating, at least one side in laser quenching
The application in face.The laser spot control system that the application provides, in laser cutting, laser cleaning, laser surface texturing, Laser Welding
Connect, be laser impact intensified, laser melting coating, laser quenching aspect, there is simple and quick feedback whether in set distance range
Function.
According to the another aspect of the application, there is provided a kind of laser cleaning head, including above-mentioned laser spot control system
At least one of, the laser spot control system measures and shows the laser cleaning head and the distance on surface to be cleaned is
It is no within a preset range.
Preferably, the laser cleaning head is hand held noncontact laser cleaning head, and the laser cleaning head includes cleaning
Laser, laser range finder, wave filter, scanning galvanometer, field lens and calculating display unit；
After the distance measuring laser beams that the laser range finder is sent are by wave filter, swept with the cleaning laser same light path directive
Galvanometer is retouched, workpiece surface to be cleaned is irradiated to by the field lens after scanning galvanometer reflection and obtains distance measurement result L；
The distance measurement result L that the laser cleaning head measures meets L- (L1+L2+ F) ＞ Δ F, then it is described calculating display unit show
Show and do not meet signal and prompt operator by laser cleaning head rest workpiece closely to be cleaned；
Or the distance measurement result L that the laser cleaning head measures meets
-ΔF≤L-(L1+L2+ F)≤Δ F, then the calculating display unit, which is shown, meets signal, prompts operator this distance
Laser cleaning can be carried out；
Or the distance measurement result L that the laser cleaning head measures meets L- (L1+L2+ F) ＜-Δ F, then it is described to calculate display
Unit, which is shown, not to be met signal and prompts operator by the laser cleaning head away from workpiece to be cleaned；
Wherein, F is the focal length of field lens；
Δ F is the maximum defocus amount of the default permission of laser spot control system；
L1Optical path distance between laser range finder and scanning galvanometer, L2Light path between scanning galvanometer and field lens away from
From.
Preferably, the laser cleaning head is the core component of Handheld laser cleaning equipment.
As a kind of specific embodiment, by the laser spot control system in manual cleaning head, including：
(1) range laser is coupling in a light path with processing laser by spectroscope, is scanned through galvanometer, F-Theta
Mirror effect is lower to reach workpiece surface to be cleaned；
(2) the preposition wave filter of laser range finder, for filtering out the interference light of its all band, ensures laser ranging
Accuracy；
(3) laser range finder obtains distance data transmission to display unit is calculated, and calculates display unit according to measurement distance
With the comparing calculation of setpoint distance, workpiece to be cleaned is determined whether within the scope of capable of washing, if in scope capable of washing, it is green
Lamp is bright；If not in scope capable of washing, when red；Wherein, the operational criterion of calculating display unit green light is：-ΔF≤L-
(L1+L2+F)≤ΔF；
Wherein, L is the distance that actual measurement obtains；
F is the focal length of F-Theta mirrors；
Δ F is the completion admissible maximum defocus amount of laser cleaning；
L1 is that laser range finder sends the distance between light beam with galvanometer system；
L2 is the distance between scanning galvanometer and F-Theta mirrors；
Display unit when red is calculated, represents that laser head is too remote from workpiece, i.e. L- (L1+L2+ F) ＞ Δs F；Either represent
Laser head is too near from workpiece, i.e. L- (L1+L2+ F) ＜-Δ F.
The Δ F is detected by laser cleaning actual mass, measurement of comparison obtains；If after changing F-Theta mirrors, F and Δ F
It will change, Δ F needs further to remeasure；
The calculating display unit can be a simple digital logical operation unit, and Δ can be set by the unit
F and F numerical value.
The workpiece to be cleaned is selected from metal material (such as stainless steel, carbon steel, aluminium alloy, high temperature alloy, titanium alloy), non-
One kind in metal material (such as glass, ceramics, plastics, composite, fabric, timber).
Beneficial effect caused by the application energy includes：
1) laser spot control system provided herein, " the defocus situation of cleaning hot spot in the prior art is overcome
Can not judge cause cleaning performance not good enough, it is necessary to which cleaning is repeated several times by naked eyes, cause the waste of manpower and the energy " it is scarce
Fall into.
2) laser spot control system provided herein, defocus distance can be monitored in real time, for hand-held cleaning head,
The cleaning of contactless high quality laser cleaning, especially narrow space can be realized, improves the quality and efficiency of cleaning.
3) laser spot control system provided herein, can monitor defocusing amount in real time, for laser machining, improve and swash
The quality and efficiency of light processing.
4) laser spot control system provided herein has safety and environmental protection, operated in laser cleaning/processing
Simply, it is easy to implement, the low advantage of cost.
Brief description of the drawings
Fig. 1 is the laser spot control system schematic diagram being related in the application.
Reference：
20- laser range finders；22- wave filters；24- calculates display unit；
40- spectroscopes；42- scanning galvanometers；44- field lenses
The pending workpiece of 6-；8- working lasers.
Embodiment
The application is described in detail with reference to embodiment, but the application is not limited to these embodiments.
Unless otherwise instructed, the raw material in embodiments herein and part are bought by commercial sources.
The model IIILaserClean-50 of the Handheld laser cleaning device, producer are Ningbo great Ai laser science and technology
Co., Ltd.
The laser cleaning of embodiment 1
Laser spot control system in the present embodiment is as shown in Figure 1, including：Including laser range finder 20, wave filter
22nd, display unit 24, spectroscope 40, scanning galvanometer 42, field lens 44, working laser 8 are calculated.Working laser 8 is in the present embodiment
Clean laser.
Specifically, the distance measuring laser beams that laser range finder 20 is sent after device 22, through spectroscope 40 and pass through after filtering
The same light path directive scanning galvanometer 42 of working laser 8 that spectroscope 40 reflects, irradiates after being reflected by scanning galvanometer 42 through field lens 44
To the surface of pending workpiece 6 and ranging, distance measurement result L is obtained.Pending workpiece 6 is workpiece to be cleaned in the present embodiment.
Wherein, it is a digital ALU to calculate display unit 24.
The present embodiment is cleaned using Handheld laser cleaning device to the paint of surface of magnesium aluminium alloy；The hand-held
The cleaning head of laser cleaner uses above-mentioned laser spot control system, and specific works pattern is as described below：
(1) laser and Handheld laser cleaning device of transmitting range laser are opened, then will by spectroscope 40
Range laser is coupling in a light path with cleaning laser 8, is scanned through galvanometer 42, field lens 44 reaches the table of workpiece 6 to be cleaned
Face；
Wherein, the laser for producing cleaning laser is wavelength 1064nm nanosecond laser；
(2) range laser that laser range finder 20 is emitted first passes through a wave filter 22, for filtering out its all band
Light is disturbed, ensures the accuracy of laser ranging；
(3) laser range finder 20 obtains range data L and is transferred to calculating display unit 24, calculates display unit 24 according to survey
Span determines workpiece 6 to be cleaned whether within the scope of capable of washing, if capable of washing from L and the comparing calculation of setpoint distance
In the range of, green light；If not in scope capable of washing, when red simultaneously prompts remote to be also proximate to；Wherein, it is single to calculate display
The operational criterion of first green light is：-ΔF≤L-(L1+L2+F)≤ΔF；
Wherein, L is the distance that actual measurement obtains；
F is the focal length of field lens；
Δ F is the completion admissible maximum defocus amount of laser cleaning；
L1The distance between light beam is sent for laser range finder and galvanometer system；
L2For the distance between scanning galvanometer and F-Theta mirrors.
Specially：
As-Δ F≤L- (L1+L2+ F)≤Δ F, calculate display unit 24 give a green light, represent laser head from a distance from workpiece in work
In the range of work, laser cleaning can be carried out；
As L- (L1+L2+ F) ＞ Δ F, calculate the when red of display unit 24 and be shown as the arrow of a reduction, represent laser
Head is too remote from workpiece, should be close；
As L- (L1+L2+ F) ＜-Δ F, calculate the when red of display unit 24 and be shown as an elevated arrow, represent to swash
It is bare headed too near from workpiece, should be remote；
The Δ F is detected by laser cleaning actual mass, measurement of comparison obtains；
The numerical value of the Δ F and F is set by calculating display unit；
That is, when operator, which holds laser cleaning head, carries out washing and cleaning operation, if calculate 24 green light of display unit, directly
Tap into row laser cleaning；If calculate 24 when red of display unit, according to prompting ambulatory handheld laser cleaning head position or
Person is the position for adjusting material to be cleaned, to display unit green light is calculated, then carries out laser cleaning.
The laser cleaning of embodiment 2
The carbon steel material to get rusty is cleaned using Handheld laser cleaning device, field lens 44 is changed, according to new field
The focal length F of mirror 44 and material to be cleaned reset Δ F.
The cleaning head of the Handheld laser cleaning device uses laser spot control system, its schematic diagram as shown in figure 1,
Its mode of operation is the same as embodiment 1.
The laser roughening of embodiment 3
Laser spot control system in the present embodiment is as shown in Figure 1, including：Including laser range finder 20, wave filter
22nd, display unit 24, spectroscope 40, scanning galvanometer 42, field lens 44, working laser 8 are calculated.Working laser 8 is in the present embodiment
Process laser.
Specifically, the distance measuring laser beams that laser range finder 20 is sent after device 22, through spectroscope 40 and pass through after filtering
The same light path directive scanning galvanometer 42 of working laser 8 that spectroscope 40 reflects, irradiates after being reflected by scanning galvanometer 42 through field lens 44
To the surface of pending workpiece 6 and ranging, distance measurement result L is obtained.Pending workpiece 6 is material to be processed in the present embodiment.
Wherein, it is a digital ALU to calculate display unit 24.
Surface texturing is carried out to die steel material using laser processing device；The laser scanning head of the laser processing device
It is as described below using above-mentioned laser spot control system, specific works pattern.
(1) laser and laser processing device of transmitting range laser are opened, is then swashed ranging by spectroscope 40
Light by being coupling in a light path, is scanned through galvanometer 42 with processing laser 8, field lens 44 reaches the surface of material 6 to be processed；
Wherein, the laser for producing processing laser is power 50W, wavelength 532nm nanosecoud pulse laser.
(2) range laser that laser range finder 20 is emitted first passes through a wave filter 22, for filtering out its all band
Light is disturbed, ensures the accuracy of laser ranging；
(3) laser range finder 20 obtains range data L and is transferred to calculating display unit 24, calculates display unit 24 according to survey
Span determines whether material 6 to be processed can be effectively laser machined apart from model from L and the comparing calculation of setpoint distance
Within enclosing, if in the range of it can effectively be laser machined, green light；If not in the range of it can effectively be laser machined,
Then when red and prompt should be away from being also proximate to；Wherein, the operational criterion of calculating display unit green light is：-ΔF≤L-(L1+
L2+F)≤ΔF；
Wherein, L is the distance that actual measurement obtains；
F is the focal length of field lens；
Δ F is the completion admissible maximum defocus amount of laser cleaning；
L1The distance between light beam is sent for laser range finder and galvanometer system；
L2For the distance between scanning galvanometer and F-Theta mirrors.
Specially：
As-Δ F≤L- (L1+L2+ F)≤Δ F, calculate display unit 24 give a green light, represent laser head from a distance from workpiece in work
In the range of work, it can be laser machined；
As L- (L1+L2+ F) ＞ Δ F, calculate the when red of display unit 24 and be shown as the arrow of a reduction, represent laser
Head is too remote from workpiece, should be close；
As L- (L1+L2+ F) ＜-Δ F, calculate the when red of display unit 24 and be shown as an elevated arrow, represent to swash
It is bare headed too near from workpiece, should be remote；
The Δ F is detected by laser cleaning actual mass, measurement of comparison obtains；
The numerical value of the Δ F and F is set by calculating display unit；
That is, when operator, which holds laser Machining head, carries out laser processing operation, if calculating the green light of display unit 24
When, directly laser machined；If calculate 24 when red of display unit, according to the position of prompting ambulatory handheld laser Machining head
The position of material to be cleaned is put or adjusted, to display unit green light is calculated, is then laser machined.
It is described above, only it is several embodiments of the application, any type of limitation is not done to the application, although this Shen
Please with preferred embodiment disclose as above, but and be not used to limit the application, any person skilled in the art, do not taking off
In the range of technical scheme, make a little variation using the technology contents of the disclosure above or modification is equal to
Case study on implementation is imitated, is belonged in the range of technical scheme.
Claims (10)
1. a kind of laser spot control system, it is characterised in that the laser spot control system includes laser range finder, field lens
With calculating display unit；
The distance measuring laser beams that the laser range finder is sent are by being irradiated to workpiece surface and ranging after the field lens；
The laser range finder electrically connects with the calculating display unit, and the laser range finder and the calculating display unit are defeated
Enter distance measurement result, and at least one signal is exported by the calculating display unit.
2. laser spot control system according to claim 1, it is characterised in that the calculating display unit passes through contrast
Whether within a preset range the laser range finder input distance measurement result and parameter preset, export the distance measurement result.
3. laser spot control system according to claim 1, it is characterised in that the laser range finder is to the calculating
The distance measurement result L of display unit input meets
L-(L0+ F) ＞ Δs F, calculating display unit first signal of output；
Or the laser range finder meets to the distance measurement result L of the calculating display unit input
-ΔF≤L-(L0+ F)≤Δ F, the calculating display unit output secondary signal；
Or the laser range finder meets to the distance measurement result L of the calculating display unit input
L-(L0+ F) ＜-Δ F, calculating display unit the 3rd signal of output；
Wherein, F is the focal length of field lens；
Δ F is the maximum defocus amount of the default permission of laser spot control system；
L0Optical path distance between laser range finder and field lens.
4. laser spot control system according to claim 3, it is characterised in that described to calculate the of display unit output
One signal, secondary signal and the 3rd signal, pass through one or more form areas combined in different colors, word, pattern
Do not show.
5. laser spot control system according to claim 3, it is characterised in that laser spot control system includes processing
Laser, scanning galvanometer and spectroscope；
Processing laser the processing laser sent and the range laser that the laser range finder is sent pass through the spectroscope
It is coupling in same light path, passes sequentially through the scanning galvanometer and field lens and be irradiated to workpiece surface；
L0=L1+L2, wherein L1Optical path distance between laser range finder and scanning galvanometer, L2Between scanning galvanometer and field lens
Optical path distance.
6. laser spot control system according to claim 1, it is characterised in that the laser spot control system includes
Wave filter, the range laser that the laser range finder is sent pass through wave filter first.
7. laser spot control system according to claim 1, it is characterised in that the calculating display unit is included at least
One digital ALU.
8. at least one of laser spot control system described in any one of claim 1 to 7, clear in laser cutting, laser
Wash, laser surface texturing, laser welding, laser impact intensified, laser melting coating, in laser quenching at least one aspect application.
9. a kind of laser cleaning head, it is characterised in that including in any one of claim 1 to the 7 laser spot control system
At least one, the laser spot control system measure and show the laser cleaning head and surface to be cleaned distance whether
Within a preset range.
10. laser cleaning head according to claim 9, it is characterised in that the laser cleaning head is hand held noncontact
Laser cleaning head, the laser cleaning head include cleaning laser, laser range finder, wave filter, scanning galvanometer, field lens and calculated aobvious
Show unit；
After the distance measuring laser beams that the laser range finder is sent are by wave filter, shaken with the cleaning laser same light path directive scanning
Mirror, workpiece surface to be cleaned is irradiated to by the field lens after scanning galvanometer reflection and obtains distance measurement result L；
The distance measurement result L that the laser cleaning head measures meets L- (L1+L2+ F) ＞ Δ F, then it is described calculating display unit show not
Meet signal and prompt operator by laser cleaning head rest workpiece closely to be cleaned；
Or the distance measurement result L that the laser cleaning head measures meets
-ΔF≤L-(L1+L2+ F)≤Δ F, then the calculating display unit show and meets signal, and prompting operator this distance can be with
Carry out laser cleaning；
Or the distance measurement result L that the laser cleaning head measures meets L- (L1+L2+ F) ＜-Δ F, then the calculating display unit
Display does not meet signal and prompts operator by the laser cleaning head away from workpiece to be cleaned；
Wherein, F is the focal length of field lens；
Δ F is the maximum defocus amount of the default permission of laser spot control system；
L1Optical path distance between laser range finder and scanning galvanometer, L2Optical path distance between scanning galvanometer and field lens.
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| CN114378051A (en) * | 2020-10-21 | 2022-04-22 | 财团法人工业技术研究院 | Laser cleaning device and method |
| CN116037574A (en) * | 2023-03-30 | 2023-05-02 | 宁德时代新能源科技股份有限公司 | Laser adjustment method, device, laser cleaning system, electronic equipment and medium |
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