CN106271045A - A kind of automatic focusing adjustor for laser processing, laser process equipment and focus adjustment method - Google Patents
A kind of automatic focusing adjustor for laser processing, laser process equipment and focus adjustment method Download PDFInfo
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- CN106271045A CN106271045A CN201610802166.4A CN201610802166A CN106271045A CN 106271045 A CN106271045 A CN 106271045A CN 201610802166 A CN201610802166 A CN 201610802166A CN 106271045 A CN106271045 A CN 106271045A
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- focusing
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- laser processing
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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
- B23K26/02—Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
- B23K26/04—Automatically aligning, aiming or focusing the laser beam, e.g. using the back-scattered light
- B23K26/046—Automatically focusing the laser beam
- B23K26/048—Automatically focusing the laser beam by controlling the distance between laser head and workpiece
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- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Laser Beam Processing (AREA)
Abstract
The invention discloses a kind of automatic focusing adjustor for laser processing, laser process equipment and focus adjustment method, this automatic focusing adjustor for laser processing can realize automatic focusing during Laser Processing, the corresponding speed of whole device is fast, compact structure, it is capable of precisely focusing, complete back focus center in focusing the most highly stable, will not change easily, it is ensured that crudy.This automatic focusing device is particularly suited for abnormal curved surface or the Laser Processing of material in uneven thickness, it is possible to the working (machining) efficiency of improving laser processing significantly and crudy.
Description
Technical field
The present invention relates to technical field of laser processing, specially relate to a kind of automatic focusing adjustor for laser processing, there is it
Laser process equipment and focus adjustment method.
Background technology
Laser Processing is widely used in many owing to having the multiple advantages such as heat affecting is little, machining accuracy is high, speed is fast
Individual field.Before Laser Processing, the distance between focusing lens and machined material is to need to adjust, and namely needs to adjust
Burnt.When focal adjustments to optimum position, could obtain high energy-flux density at focal point, rapidoprint is under the effect of laser
Transient evaporation, it is achieved the processing to material, produces best effect.Along with integrated circuit and the development of computer technology, automatically
Focus technique is widely used in the fields such as camera imaging, machine vision and optics Aulomatizeted Detect.And laser automatic focusing device
Being the device of a kind of effective regulation focal position of laser, it enables to reach more preferable processing effect during Laser Processing.
Traditional laser head has focused manual adjustment knob mode, uses relevant mechanism rotation to be transported time namely
Move and be converted into linear motion, realize the regulation of focal position of laser.This kind of mode not only moment of torsion is relatively small, relevant zero
Part coordinates also can be more loose, the problem that focus adjustment rear center position changes easily occurs, and reduces crudy, even shadow
Ring the continuity of processing operation.In addition, applying more focusing mode at present in focusing field is laser instrument and laser head
It is rigidly connected, when focal position to be changed, needs both to move up and down together.Slowly, operation is multiple in this kind of processing mode response
Miscellaneous, precision is low, has a strong impact on working (machining) efficiency, furthermore to abnormal curved surface or the processing of different-thickness material, swashs owing to adding man-hour
Light focal length needs to be continually changing, and conventional focusing mode can not meet processing request, inefficiency, has a strong impact on processing effect,
The fault rate of existing focus adjusting mechanism is the most higher, and maintenance cost is bigger.
Summary of the invention
The first object of the present invention is the shortcoming overcoming prior art, it is provided that a kind of automatic focusing adjustor for laser processing, with
The efficiency of improving laser processing.
For reaching above-mentioned purpose, the technical solution used in the present invention is: a kind of automatic focusing adjustor for laser processing, described tune
Coke installation includes:
Focusing pedestal, it has along self axially extended focusing slideway；
Laser mouth, is arranged on the shaft end of described focusing pedestal；
Focusing drum, it has been fixedly mounted focus lamp, and described focusing drum is located at described focusing slideway axially slidably along self
In；
Drive mechanism, is located on described focusing pedestal for driving described focusing drum to slide along described focusing slideway；
Image acquisition device, for obtaining the hot spot figure being projected on workpiece to be processed surface through described focus lamp and described laser mouth
Picture；
Controller, described controller is connected with described image acquisition device, described drive mechanism signal respectively, described controller according to
The light spot image that described image acquisition device collects controls the work of described drive mechanism and orders about described focusing drum along described focusing
Slideway slides and realizes focusing.
Preferably, described laser mouth is arranged with described focus lamp coaxial inner conductor.
Preferably, described focus lamp is arranged on focusing microscope base, and described focusing microscope base is removably mounted on described focusing
On cylinder.
Preferably, described focusing pedestal offers axially through cavity, described cavity forms described focusing
Slideway, described focusing drum is arranged between the outside perimembranous of described focusing drum time in described focusing slideway and described focusing slideway logical
Cross multiple sealing member movable sealing and connect setting.
Preferably, described image acquisition device is to be relatively fixed the ccd detector of setting, described CCD with described focusing pedestal
The light spot image got is sent to described controller by detector, and described controller is straight according to the hot spot in described light spot image
Footpath size and send feedback signal to described drive mechanism with control described drive mechanism running status.
Preferably, described drive mechanism is linear electric motors, and described linear electric motors include being fixedly arranged on described focusing pedestal
The primary that length bearing of trend secondary, along described secondary slides, described primary and described focusing drum is fixing to be connected.
Preferably, described focussing mechanism also includes that protective glass, described protective glass are located at described laser mouth and described focusing base
Between Zuo.
Further, described laser mouth is removably mounted on the shaft end of described focusing pedestal by helicitic texture,
The end being connected with described focusing pedestal on described laser mouth is provided with storage tank, and described protective glass is located at described storage tank
In.
The second object of the present invention is to provide a kind of laser process equipment with above-mentioned automatic focusing adjustor for laser processing.
For reaching above-mentioned purpose, the technical solution used in the present invention is: a kind of laser process equipment, described Laser Processing sets
For including the laser instrument for sending laser beam, for placing the workbench of workpiece to be processed, Laser Processing described above certainly
Dynamic focussing mechanism, the laser beam that described laser instrument produces focuses on the surface of described workpiece to be processed by described focussing mechanism
On.
The third object of the present invention is to provide a kind of Laser Processing automatic focusing method.
For reaching above-mentioned purpose, the technical solution used in the present invention is: a kind of Laser Processing automatic focusing method, its feature
Being, using above-mentioned laser process equipment, this focus adjustment method comprises the steps:
S1, the machined parameters of described laser instrument is set；
S2, described drive mechanism are ordered about described focusing drum and are moved towards or away from described laser mouth along described focusing slideway, described
Image acquisition device is projected to the light spot image on described workpiece to be processed surface during gathering this, described controller obtains described
Light spot image also sends feedback signal extremely described drive mechanism according to spot diameter size therein,
During described focusing drum moves towards a direction, if on described light spot image, spot diameter becomes larger, then
Described controller sends feedback signal to described drive mechanism so that it drives described focusing drum to slide in the opposite direction；If institute
Stating spot diameter on light spot image to taper into, the most described controller sends feedback signal to described drive mechanism so that it drives
Described focusing drum continues to slide in the direction, during until spot diameter is minimum on the described light spot image obtained, and described control
Device sends feedback signal and makes described focusing drum stop motion to described drive mechanism.
Due to the utilization of technique scheme, the present invention compared with prior art has the advantage that the laser of the present invention
Processing automatic focusing device, it is possible to realize automatic focusing during Laser Processing, the corresponding speed of whole device is fast, structure
Small and exquisite, it is possible to realize precisely focusing, complete back focus center in focusing the most highly stable, will not change easily, protect
Demonstrate,prove crudy.This automatic focusing device is particularly suited for abnormal curved surface or the Laser Processing of material in uneven thickness, it is possible to
The working (machining) efficiency of improving laser processing significantly and crudy.
Accompanying drawing explanation
Accompanying drawing 1 is the internal structure schematic diagram of the focussing mechanism of the present invention；
Accompanying drawing 2 is the light path schematic diagram of the focussing mechanism of the present invention；
Accompanying drawing 3 is the operation principle schematic diagram of the focussing mechanism of the present invention；
Wherein: 100, focussing mechanism；200, workpiece to be processed；1, focusing pedestal；1a, focusing slideway；1b, receiving chamber；2, laser
Mouth；2a, mouth；2b, holding tank；3, focusing drum；4, microscope base is focused on；5, focus lamp；6, drive mechanism；61, primary；62, secondary；
7, protective glass；8, contiguous block；9, image acquisition device (ccd detector)；10, sealing ring.
Detailed description of the invention
With specific embodiment, technical scheme is further elaborated below in conjunction with the accompanying drawings.
Seeing the automatic focusing adjustor for laser processing shown in Fig. 1 to Fig. 3, this focussing mechanism 100 is applied to Laser Processing and sets
When workpiece to be processed 200 being processed on Bei, laser process equipment also include the laser instrument for sending laser beam, for
Placing the workbench of workpiece to be processed 200, focussing mechanism 100 is i.e. located between the workpiece to be processed on workbench and laser instrument,
The laser beam that laser instrument produces is focused on the surface of workpiece to be processed 200 by focussing mechanism 100.
Seeing shown in Fig. 1, Fig. 2, this focussing mechanism 100 includes focusing pedestal 1, is arranged on focusing pedestal 1 shaft end and uses
In the laser mouth 2 of laser output, it is located on focusing pedestal 1 and is fixedly mounted the focusing drum 3 of focus lamp 5 slidably, wherein,
Having along self axially extended focusing slideway 1a on focusing pedestal 1, focusing drum 3 is located at focusing slideway axially slidably along self
In 1a.Specifically, focusing pedestal 1 on offer axially through cavity, this cavity just forms above-mentioned focusing slideway
1a and provide focusing drum 3 with slide-and-guide；When focusing drum 3 is arranged in focusing slideway 1a, the outside perimembranous of focusing drum 3 and focusing
Form movable sealing by multiple sealing members between slideway 1a and connect setting, specifically can offer many in the outside perimembranous of focusing drum 3
Individual cannelure also arranges O RunddichtringO 10 in above-mentioned cannelure, seals to be formed between focusing drum 3 and focusing slideway 1a,
Thus play the effect intercepting dust.
Focus lamp 5 is fixedly mounted on focusing microscope base 4, and this focusing microscope base 4 is removably mounted on focusing drum 3.If
When putting, focus lamp 5 is also connected with feed flow circulating water machine, to ensure cooling effect.
Laser mouth 2 and focus lamp 5 answer coaxial inner conductor to arrange, specifically, the axial line of the mouth 2a on laser mouth 2 end and
The axial line conllinear of focus lamp 5 is arranged, so that the laser beam after line focus mirror 5 focuses on is projected to treat through laser mouth 2
On processing workpiece 200.Laser mouth 2 can be removably installed on the shaft end of focusing pedestal 1 by helicitic texture.Laser mouth 2
And it is additionally provided with protective glass 7 between focusing pedestal 1, to form the protective effect to focus lamp 5.Specifically, on laser mouth 2 with focusing
The end that pedestal 1 is connected is provided with storage tank 2b, and protective glass 7 is i.e. located in storage tank 2b, as shown in Figure 1.
Shown in Figure 1, focussing mechanism 100 also includes drive mechanism 6, and it is used for driving focusing drum 3 along focusing slideway 1a
Sliding, this drive mechanism 6 is arranged on focusing pedestal 1.Herein, drive mechanism 6 use for linear electric motors, it has height
The features such as speed linear motion characteristic and corresponding speed is fast, compact structure, mobile accuracy are high, can easily be accommodated, control, it is possible to rapidly
Realize the position adjustment of focusing drum 3.Offering receiving chamber 1b on focusing pedestal 1, linear electric motors are i.e. located in the 1b of this receiving chamber.Should
Linear electric motors include that primary 61 and secondary 62, secondary 62 are located on focusing pedestal 1 regularly, and its length bearing of trend is parallel to adjust
The axial line of burnt pedestal 1, primary 61 can be arranged slidably along the length bearing of trend of secondary 62, and primary 61 pass through contiguous block 8
Fixing with focusing drum 3 and be connected, so, primary 61 just can order about focusing drum 3 when sliding along secondary 62 slides along the slideway 1a that focuses.
This focussing mechanism 100 also includes image acquisition device 9 and controller (not shown).Image acquisition device 9 and focusing
Between pedestal 1, position is arranged with being relatively fixed, herein image acquisition device 9 use for ccd detector, it is used for obtaining line focus
Mirror 5 and laser mouth 2 are projected to the light spot image on workpiece to be processed 200 surface.Controller respectively with image acquisition device 9 and drive
Mechanism 6 signal connects, and the light spot image collected is sent to controller by image acquisition device 9, and this controller is further according to this hot spot
On image, the size of spot diameter sends corresponding feedback signal to drive mechanism 6, thus controls the operation shape of drive mechanism 6
State, so order about focusing mount 3 along focusing slideway 1a correspondingly carry out sliding and realize focusing.
Focussing mechanism 100, during focusing, first passes through drive mechanism 6 and orders about focusing drum 3 towards or away from laser mouth 2
Motion, comes compartment of terrain by image acquisition device 9 during this motion and obtains light spot image, and controller is first according to these hot spots
On image, the Changing Pattern of spot diameter judges the direction of focusing, i.e. during focusing drum 3 moves towards certain direction,
If spot diameter constantly becomes big, then explanation laser beam off-focal, controller then sends feedback signal to drive mechanism 6 and makes
It drives focusing drum 3 to slide in the opposite direction；And if when spot diameter constantly diminishes, then laser beam increasingly convergence being described
Focus, controller sends feedback signal to drive mechanism 6 and makes it drive focusing drum 3 to continue in the direction to slide, until image is adopted
In the light spot image that storage 9 collects, spot diameter is for time minimum, then illustrating that hot spot now is required pinpointed focus, control
Device processed sends feedback signal and makes focusing drum 3 stop motion to drive mechanism 6, the most just achieves fast accurate ground and automatically adjusts
Burnt.
Shown in Figure 3, this focussing mechanism 100 matches with laser instrument and is located at the top of workpiece to be processed 200, and laser adds
During work, laser instrument is not subjected to displacement with focussing mechanism 100, and translates the most in the horizontal direction.Treat
The surface of processing workpiece 200 is curved-surface structure, so translates in the horizontal direction when focussing mechanism 100 and laser instrument and changes processing
During position, just need to re-focuse.
Before Laser Processing, the machined parameters of laser instrument is set previously according to processing request so that what laser instrument produced swashs
Light light beam is incident upon on the surface of workpiece to be processed 200 by after focussing mechanism 100.Then, image acquisition device 9 start working and
Gather the light spot image of formation after laser beam is projected on workpiece to be processed 200 surface and feed back to controller, focussing mechanism
100 start and realize automatic focusing so that during whole Laser Processing, laser beam is incident upon optimal focus position all the time
Place, it is achieved optimal focusing effect, thus improve Laser Processing efficiency.
To sum up, using the automatic focusing adjustor for laser processing of the present invention, it can realize automatically adjusting during Laser Processing
Jiao, this compare traditional laser instrument move together with laser head and for carrying out the mode focused, the response speed of this focussing mechanism
Spend the sensitiveest, rapid, it is possible to realize focusing the most accurately.This focussing mechanism compact structure, maintenance cost is low, is focusing
Become back focus center the most highly stable, will not change easily, it is ensured that crudy.This automatic focusing device is especially
Be applicable to abnormal curved surface or the Laser Processing of material in uneven thickness, it is possible to significantly improving laser processing working (machining) efficiency and add
Working medium amount.
Above-described embodiment, only for technology design and the feature of the explanation present invention, its object is to allow person skilled in the art's energy
Solution present disclosure much of that is also implemented according to this, can not limit the scope of the invention with this.All according to present invention spirit
The equivalence that essence is made changes or modifies, and all should contain within protection scope of the present invention.
Claims (10)
1. an automatic focusing adjustor for laser processing, it is characterised in that described focussing mechanism includes:
Focusing pedestal, it has along self axially extended focusing slideway；
Laser mouth, is arranged on the shaft end of described focusing pedestal；
Focusing drum, it has been fixedly mounted focus lamp, and described focusing drum is located at described focusing slideway axially slidably along self
In；
Drive mechanism, is located on described focusing pedestal for driving described focusing drum to slide along described focusing slideway；
Image acquisition device, for obtaining the hot spot figure being projected on workpiece to be processed surface through described focus lamp and described laser mouth
Picture；
Controller, described controller is connected with described image acquisition device, described drive mechanism signal respectively, described controller according to
The light spot image that described image acquisition device collects controls the work of described drive mechanism and orders about described focusing drum along described focusing
Slideway slides and realizes focusing.
Automatic focusing adjustor for laser processing the most according to claim 1, it is characterised in that: described laser mouth and described focusing
Mirror coaxial inner conductor is arranged.
Automatic focusing adjustor for laser processing the most according to claim 1, it is characterised in that: described focus lamp is arranged on focusing
On microscope base, described focusing microscope base is removably mounted on described focusing drum.
Automatic focusing adjustor for laser processing the most according to claim 1, it is characterised in that: offer on described focusing pedestal
Axially through cavity, described cavity forms described focusing slideway, and described focusing drum is arranged in described focusing slideway
It is connected setting by multiple sealing member movable sealings between the outside perimembranous of Shi Suoshu focusing drum with described focusing slideway.
Automatic focusing adjustor for laser processing the most according to claim 1, it is characterised in that: described image acquisition device for institute
Stating focusing pedestal and be relatively fixed the ccd detector of setting, the light spot image got is sent to described control by described ccd detector
Device processed, described controller send according to the spot diameter size in described light spot image feedback signal to described drive mechanism with
Control the running status of described drive mechanism.
Automatic focusing adjustor for laser processing the most according to claim 1, it is characterised in that: described drive mechanism is straight-line electric
Machine, secondary that described linear electric motors include being fixedly arranged on described focusing pedestal, length bearing of trend along described secondary slide
Primary, described primary and described focusing drum is fixing to be connected.
Automatic focusing adjustor for laser processing the most according to claim 1, it is characterised in that: described focussing mechanism also includes protecting
Goggle, described protective glass is located between described laser mouth and described focusing pedestal.
Automatic focusing adjustor for laser processing the most according to claim 7, it is characterised in that: described laser mouth is tied by screw thread
Structure is removably mounted on the shaft end of described focusing pedestal, the end that described laser mouth is connected with described focusing pedestal
Being provided with storage tank, described protective glass is located in described storage tank.
9. a laser process equipment, it is characterised in that described laser process equipment includes the laser for sending laser beam
Device, for placing the workbench of workpiece to be processed, automatic focusing adjustor for laser processing as described in claim 1 to 8 is arbitrary, institute
The laser beam stating laser instrument generation is focused on the surface of described workpiece to be processed by described focussing mechanism.
10. a Laser Processing automatic focusing method, it is characterised in that use laser process equipment as claimed in claim 9,
This focus adjustment method comprises the steps:
S1, the machined parameters of described laser instrument is set；
S2, described drive mechanism are ordered about described focusing drum and are moved towards or away from described laser mouth along described focusing slideway, described
Image acquisition device is projected to the light spot image on described workpiece to be processed surface during gathering this, described controller obtains described
Light spot image also sends feedback signal extremely described drive mechanism according to spot diameter size therein,
During described focusing drum moves towards a direction, if on described light spot image, spot diameter becomes larger, then
Described controller sends feedback signal to described drive mechanism so that it drives described focusing drum to slide in the opposite direction；If institute
Stating spot diameter on light spot image to taper into, the most described controller sends feedback signal to described drive mechanism so that it drives
Described focusing drum continues to slide in the direction, during until spot diameter is minimum on the described light spot image obtained, and described control
Device sends feedback signal and makes described focusing drum stop motion to described drive mechanism.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610802166.4A CN106271045A (en) | 2016-09-05 | 2016-09-05 | A kind of automatic focusing adjustor for laser processing, laser process equipment and focus adjustment method |
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| CN201610802166.4A CN106271045A (en) | 2016-09-05 | 2016-09-05 | A kind of automatic focusing adjustor for laser processing, laser process equipment and focus adjustment method |
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Cited By (8)
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| CN108161245A (en) * | 2017-12-26 | 2018-06-15 | 武汉力博物探有限公司 | One kind can automatic focusing formula laser cutting head |
| CN109483049A (en) * | 2018-11-28 | 2019-03-19 | 大族激光科技产业集团股份有限公司 | Laser cutting device and its focus adjustment method and focusing system |
| CN110253140A (en) * | 2019-07-25 | 2019-09-20 | 岗春激光科技（江苏）有限公司 | A kind of laser Machining head and laser process equipment |
| CN110711937A (en) * | 2019-11-14 | 2020-01-21 | 安徽同兴科技发展有限责任公司 | Parameter determination method for laser focusing of cutting machine |
| CN112264395A (en) * | 2020-09-27 | 2021-01-26 | 厦门理工学院 | Focusing device of laser cleaning machine |
| CN113878228A (en) * | 2021-11-11 | 2022-01-04 | 中国科学院力学研究所 | Controllable focusing device for inner wall laser processing |
| CN115138992A (en) * | 2022-08-11 | 2022-10-04 | 广东宏石激光技术股份有限公司 | System and method for determining zero focus of laser cutting head |
| CN115877391A (en) * | 2023-01-31 | 2023-03-31 | 宜科(天津)电子有限公司 | Data processing system for detecting object distance |
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| CN113878228A (en) * | 2021-11-11 | 2022-01-04 | 中国科学院力学研究所 | Controllable focusing device for inner wall laser processing |
| CN113878228B (en) * | 2021-11-11 | 2022-12-09 | 中国科学院力学研究所 | Controllable focusing device for inner wall laser processing |
| CN115138992A (en) * | 2022-08-11 | 2022-10-04 | 广东宏石激光技术股份有限公司 | System and method for determining zero focus of laser cutting head |
| CN115877391A (en) * | 2023-01-31 | 2023-03-31 | 宜科(天津)电子有限公司 | Data processing system for detecting object distance |
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Application publication date: 20170104 |