CN108436283A - Laser marking machine and its marking method - Google Patents
Laser marking machine and its marking method Download PDFInfo
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- CN108436283A CN108436283A CN201810322886.XA CN201810322886A CN108436283A CN 108436283 A CN108436283 A CN 108436283A CN 201810322886 A CN201810322886 A CN 201810322886A CN 108436283 A CN108436283 A CN 108436283A
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- laser
- filling
- filling point
- controller
- mark
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/02—Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
- B23K26/06—Shaping the laser beam, e.g. by masks or multi-focusing
- B23K26/064—Shaping the laser beam, e.g. by masks or multi-focusing by means of optical elements, e.g. lenses, mirrors or prisms
-
- 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
- B23K26/06—Shaping the laser beam, e.g. by masks or multi-focusing
- B23K26/064—Shaping the laser beam, e.g. by masks or multi-focusing by means of optical elements, e.g. lenses, mirrors or prisms
- B23K26/0648—Shaping the laser beam, e.g. by masks or multi-focusing by means of optical elements, e.g. lenses, mirrors or prisms comprising lenses
-
- 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
- B23K26/36—Removing material
- B23K26/361—Removing material for deburring or mechanical trimming
Abstract
The present invention relates to a kind of laser marking machine and its marking method, laser marking machine includes：Laser, galvanometer mechanism, focus lamp and controller, laser, galvanometer mechanism and focus lamp sequentially connect, and controller is connect with galvanometer mechanism, and laser is for generating laser；Controller is used to wait for that mark pattern carries out dot matrix filling to input, be exported by the dot pattern that the filling point of multiple array arrangements is constituted with being formed；The location parameter for each filling point that galvanometer mechanism is used to be exported according to controller controls the deflection of laser；Focus lamp is used to focus on the laser exported from galvanometer mechanism on workpiece to form label.Since each filling point that dot matrix fills the dot pattern to be formed is uniform, rule distribution, ensure to realize uniform mark effect in workpiece surface, solve the problems, such as that the mode of traditional line filling inputs when mark pattern that the mark effect caused by the filling line bending for constituting output pattern and spacing are uneven is non-uniform, substantially increases the mark quality of workpiece.
Description
Technical field
The present invention relates to technical field of laser processing, more particularly to a kind of laser marking machine and its marking method.
Background technology
Traditional laser marking machine waits for mark pattern by its controller when carrying out mark processing to workpiece to input
It fills into line, is exported by the pattern that multiple filling lines being interspersed are constituted with being formed；Galvanometer mechanism is according to the figure of controller
Case output information controls the deflection of laser, finally ensures that laser waits for that the track movement on mark face by setting leaves forever in workpiece
Long label.Due to inputting the shadow for the positioning accuracy for being often limited to galvanometer mechanism when mark pattern by the way of line filling
It rings so that constitute the problems such as filling line of the output pattern is susceptible to bending and uneven spacing, eventually lead to and process
Workpiece there is striped, mark quality is difficult to reach satisfactory effect.
Invention content
Based on this, it is necessary to provide a kind of laser marking machine and its marking method that can improve workpiece mark quality.
A kind of laser marking machine, including：Laser, galvanometer mechanism, focus lamp and controller, the laser described shake
Illuminating apparatus structure and the focus lamp sequentially connect, and the controller is connect with the galvanometer mechanism, and the laser is sharp for generating
Light；The controller is used to wait for that mark pattern carries out dot matrix filling to input, to form the filling point by multiple array arrangements
The dot pattern of composition exports；The location parameter control for each filling point that the galvanometer mechanism is used to be exported according to the controller
Make the deflection of the laser；The focus lamp is used to focus on the laser exported from the galvanometer mechanism on workpiece to form mark
Note.
The controller is used to set the density size of the filling point in one of the embodiments,.
In one of the embodiments, the controller for control the filling point carry out within a preset range it is a certain amount of
Random offset and size for setting the preset range.
The controller is for controlling knowledge of the galvanometer mechanism to each filling point in one of the embodiments,
It carry out not disordering processing.
Further include at least one of following in one of the embodiments,：
Beam expanding lens for the diameter for expanding the laser exported from the laser, the beam expanding lens are set to the laser
Between device and the galvanometer mechanism；And
Workbench for carrying the workpiece, the workbench are located at the lower section of the focus lamp.
The laser is infrared optical fiber laser in one of the embodiments, and/or the focus lamp is F-
Theta lens.
A kind of marking method, including：
Input waits for mark pattern；
To waiting for that mark pattern carries out dot matrix filling described in input, it is made of the filling point of multiple array arrangements with formation
Dot pattern exports；
The deflection of laser is controlled according to the location parameter of each filling point of output；And
The laser of output is focused on workpiece to form label.
Described pair of the described of input waits for that mark pattern carries out dot matrix filling in one of the embodiments, to be formed by more
Further include before the step of dot pattern output that the filling point of a array arrangement is constituted：
The density size of the filling point is set according to the actual demand of mark effect.
Described pair of the described of input waits for that mark pattern carries out dot matrix filling in one of the embodiments, to be formed by more
Further include after the step of dot pattern output that the filling point of a array arrangement is constituted：
It controls the filling point and carries out a certain amount of random offset within a preset range.
Described pair of the described of input waits for that mark pattern carries out dot matrix filling in one of the embodiments, to be formed by more
Further include after the step of dot pattern output that the filling point of a array arrangement is constituted：
Disordering processing is carried out to the identification of each filling point.
Above-mentioned laser marking machine and its marking method, by waiting for that mark pattern carries out dot matrix filling to input, to be formed
The dot pattern output being made of the filling point of multiple array arrangements, since dot matrix fills each filling point for the dot pattern to be formed
It is uniform, rule distribution, so that it is guaranteed that realizing uniform mark effect in workpiece surface, solves the side of traditional line filling
Formula input mark effect caused by the filling line bending and spacing that constitute output pattern are uneven when mark pattern is uneven
The problem of, ensure the exquisite appearance degree of workpiece, substantially increases the mark quality of workpiece；Simultaneously be adapted to leather, shoemaking,
Bullion, commemorative coin, PC etc. need to be carved, identified on steel mirror surface mould, the industry of the marks processing such as coding, and
And the corresponding actual demand for meeting large format mark processing.
Description of the drawings
Fig. 1 is the structural schematic diagram of the laser marking machine in one embodiment of the invention；
Fig. 2 is the structural schematic diagram of the dot pattern in one embodiment of the invention；
Fig. 3 is the flow chart of the marking method in one embodiment of the invention；
Fig. 4 is the random offset state diagram of the filling point in dot pattern shown in Fig. 2；
Fig. 5 is the random offset design sketch of the filling point in dot pattern shown in Fig. 2；
Fig. 6 is the workpiece mark effect contrast figure in one embodiment of the invention.
Specific implementation mode
To facilitate the understanding of the present invention, below with reference to relevant drawings to invention is more fully described.In attached drawing
Give the better embodiment of the present invention.But the present invention can realize in many different forms, however it is not limited to herein
Described embodiment.On the contrary, the purpose of providing these embodiments is that making to understand more the disclosure
Add thorough and comprehensive.
It should be noted that when element is referred to as " being fixed on " another element, it can be directly on another element
Or there may also be elements placed in the middle.When an element is considered as " connection " another element, it can be directly connected to
To another element or it may be simultaneously present centering elements.Term as used herein " vertical ", " horizontal ", " left side ",
" right side " and similar statement for illustrative purposes only, are not offered as being unique embodiment.
Unless otherwise defined, all of technologies and scientific terms used here by the article and belong to the technical field of the present invention
The normally understood meaning of technical staff is identical.Used term is intended merely to description tool in the description of the invention herein
The purpose of the embodiment of body, it is not intended that in the limitation present invention.Term " and or " used herein includes one or more
Any and all combinations of relevant Listed Items.
As shown in Figures 1 and 2, the laser marking machine 100 in one embodiment of the invention includes laser 110, galvanometer mechanism
120, focus lamp 130 and controller 140.Laser 110, galvanometer mechanism 120 and focus lamp 130 sequentially connect.Controller 140 with
Galvanometer mechanism 120 connects.Laser 110 is for generating laser.Controller 140 is used to wait for that mark pattern carries out dot matrix to input
Filling is exported with forming the dot pattern 200 being made of the filling point 210 of multiple array arrangements.Galvanometer mechanism 120 is used for basis
The deflection of the location parameter control laser for each filling point 210 that controller 140 exports.Focus lamp 130 is used for will be from galvanometer machine
The laser that structure 120 exports focuses on workpiece to form label.
Further, in the present embodiment, the pulse width of laser 110 is 1-200ns.Different lasers 110,
Pulse width can change in very large range, and pulse width is to ensure a key factor of workpiece mark quality, pulse
Width is smaller, and laser transient energy is higher, and peak power is higher, can effectively shorten laser in the action time of workpiece surface, wink
Between single-pulse laser act on workpiece surface, make a mark in the case of can be only achieved not disfiguring workpiece.The present embodiment limits
Laser 110 pulse width be 1-200ns, so that laser 110 is sent out sufficiently small pulse, to reach guarantee workpiece
The uniform effect of mark.
In one embodiment, laser 110 can be infrared optical fiber laser, and wavelength 1064nm, repetition rate is
1-3000kHz, power 20W.Infrared optical fiber laser have good beam quality, single-point energy is big, pulse width is short, peak work
The high advantage of rate is capable of the polishing layer of preferably place to go workpiece surface；The hot shadow for the laser that infrared optical fiber laser generates simultaneously
Sound is smaller, is not easy to cause workpiece temperature distortion and generates burn traces and lead to the mark effect for occurring turning to be yellow.
In one embodiment, further, galvanometer mechanism 120 includes X galvanometers and Y galvanometers, and wherein X galvanometers and Y galvanometers is equal
It is composed of scan module and optical mirror.It is utilized respectively X galvanometers and the scan module of Y galvanometers drives corresponding light
It learns speculum and carries out gauche form movement in X-direction and Y-direction, so that the dot chart that laser motion is exported to controller 140
The position of each filling point 210 of case 200.
It should be pointed out that in one embodiment, focus lamp 130 is F-Theta lens.Focus lamp 130 determines laser
The focal length of the working range of marking machine 100, focus lamp 130 is longer, and working range is accordingly bigger, and the hot spot after focusing can also be got over
Greatly, the Energy distribution uniformity coefficient after focusing in working range also can be poorer.Common F-Theta lens include F80 (focal lengths
80mm), F100 (focal length 100mm), F160 (focal length 160mm), F210 (focal length 210mm), F254 (focal length 254mm), F300 are (burnt
Away from 300mm) and F430 (focal length 430mm).In the present embodiment, focus lamp 130 is chosen to be the F- of F100 (focal length 100mm)
Theta lens.
As shown in Figure 1, in one embodiment, above-mentioned laser marking machine 100 may also include beam expanding lens 150.Beam expanding lens 150 is set
It is placed between laser 110 and galvanometer mechanism 120.Beam expanding lens 150 is used to expand the diameter of the laser exported from laser 110,
To improve the transmission characteristic of laser so that laser is preferably converged to workpiece surface by it.Further, the expansion of beam expanding lens 150
Beam multiple can be 1~3 times.In one embodiment, above-mentioned laser marking machine 100 may also include workbench 160.Workbench
160 are located at the lower section of focus lamp 130.Workbench 160 is for carrying workpiece.
In order to obtain finer mark effect, it is necessary to reduce the spot size after focusing, influence the hot spot after focusing
The factor of size includes launching spot size before the focal length of focus lamp 130, the quality of laser beam, wavelength, focusing.In focus lamp
130 and laser 110 determine in the case of, pass through select beam expanding lens 150 obtain small light spot.If above-mentioned record is it is found that beam expanding lens
150 enlarged-diameter for the laser before the focusing of focus lamp 130 after projecting laser 110,150 multiple of beam expanding lens is bigger, gathers
Hot spot is bigger before coke, and hot spot is smaller after focusing, and mark effect is finer.The multiple of beam expanding lens 150 is set to 2 times or so guarantee laser
Reflection is all caught by galvanometer mechanism 120, if the multiple of beam expanding lens 150 is too big, galvanometer mechanism 120 cannot catch entire hot spot meeting
Cause loss and the beam spot deformation of laser energy.
Further, in one embodiment, controller 140 can be used for setting the density size of filling point 210, to meet not
With the actual demand of mark effect.During practical mark, different mark effects has difference to the density of filling point 210
Demand.In one embodiment, such as on steel mirror surface mould frosted pattern is carved, when needing the mark effect of full sand,
The density of larger value of filling point 210 can be then set by controller 140, ensured the folded rate again of filling point 210, avoided leaking out
The generation of the ground phenomenon of the minute surface grinding tool；It similarly, then can be by controller 140 to filling out when needing the mark effect of sand leakage
The density size for filling a little 210 carries out appropriate adjusting, to be adapted to the actual demand of the sand leakage mark effect of different density degree, debugging
Method simple, intuitive, controllability are strong.
Further, in one embodiment, controller 140 carries out centainly within a preset range for controlling filling point 210
The random offset of amount and size for setting preset range.Since dot matrix fills each filling for the dot pattern 200 to be formed
Point 210 be uniformly, the distribution of rule, therefore the final mark effect of workpiece has certain regularity, relatively not natural enough.For
More natural mark effect is obtained, each filling point 210 can be controlled by controller 140 carries out within a preset range centainly
The random offset of amount so that the distribution of filling point 210 has more randomness so that the final mark effect of workpiece more from
So.
The function of the above-mentioned setting preset range of controller 140 is especially effective when to the mark effect of full sand, because entirely
Sand mark effect needs to ensure the folded rate again of filling point 210, by controller 140 to the reasonable set of above-mentioned preset range, from
And it can preferably avoid leaking out the generation of the ground phenomenon of the minute surface grinding tool.
In one embodiment, further, controller 140 can be used for controlling galvanometer mechanism 120 to each filling point 210
Identification carries out disordering processing.In order to enable the mark effect of workpiece is more naturally, galvanometer mechanism can be controlled by controller 140
The identification of 120 pairs of each filling points 210 carries out disordering processing so that galvanometer mechanism 120 according to unordered mode to swashing
Light into horizontal deflection be emitted so that workpiece it is final mark effect it is more natural.
As shown in figure 3, the present invention also provides a kind of marking methods carrying out mark using above-mentioned laser marking machine 100.
Marking method includes：
S110, input wait for mark pattern.Mark pattern is waited for the input of controller 140.Wherein, waiting for mark pattern can be
The map file of the formats such as PLT, DXF, AI.
S130 waits for that mark pattern carries out dot matrix filling, to form 210 structure of filling point by multiple array arrangements to input
At dot pattern 200 export.Controller 140 waits for that mark pattern carries out dot matrix filling to input, to be formed by multiple arrays
The dot pattern 200 that the filling point 210 of arrangement is constituted exports.
S150 controls the deflection of laser according to the location parameter of each filling point 210 of output.
Step S130 that is to say the mark process of laser, each filling point that galvanometer mechanism 120 is exported according to controller 140
The deflection for the laser that 210 location parameter control laser 110 exports.Specifically, X galvanometers and the scan module of Y galvanometers drive
Corresponding optical mirror carries out gauche form movement in X-direction and Y-direction, so that the laser that laser 110 exports
Move to the position of each filling point 210 of the dot pattern 200 of the output of controller 140.
S170 focuses on the laser of output on workpiece to form label.Specifically, by focus lamp 130 will at this time from
The laser that galvanometer mechanism 120 exports focuses on workpiece to form label.
In one embodiment, mark pattern, which carries out dot matrix filling, to be waited for input, to be formed by multiple array arrangements
It may also include before the step S130 that the dot pattern 200 that filling point 210 is constituted exports：Step S120, according to mark effect
Actual demand sets the density size of filling point 210.
The density size that filling point 210 is preset by controller 140, to be adapted to different mark effects to filling point
The different demands of 210 density size.When it is implemented, by controller 140 set filling point 210 horizontal spacing and it is vertical between
Away from.
Further, may also include after step S130：Step S134, control filling point 210 carry out within a preset range
A certain amount of random offset.Specifically, as shown in Figures 4 and 5, it is being circle with its center P that controller 140, which controls filling point 210,
Heart preset length R is that the border circular areas that radius is formed carries out a certain amount of random offset so that the distribution of filling point 210 has more
Randomness so that workpiece it is final mark effect it is more natural.
It should be pointed out that the action of above-mentioned steps S134 is in the location parameter control according to each filling point 210 of output
It is executed before the step S150 of the deflection of laser processed.Further, further include before above-mentioned steps S134：Step S131, according to
The size of the actual demand setting preset range of different mark effects.Step S132, according to the size of obtained preset range, certainly
The dynamic random offset for distributing each filling point 210.
When it is implemented, as shown in figure 4, before the random offset of control filling point 210, according to different effects up to standard
Actual demand sets the numerical values recited of preset length R by controller 140, to obtain the default of 210 random offset of filling point
Range.After controller 140 obtains the size of the preset range of 210 random offset of filling point, controller 140 is then by advance
The program of setting distributes the random offset of each filling point 210 automatically.
In one embodiment, may also include after step S130：Step S136, the identification to each filling point 210
Carry out disordering processing.Preferably, the action of above-mentioned steps S136 carries out a certain amount of within a preset range in control filling point 210
Random offset step S134 after execute.
As shown in fig. 6, control galvanometer mechanism 120 by controller 140 carries out disordering to the identification of each filling point 210
Processing, so that galvanometer mechanism 120 can carry out partially laser according to unordered mode during executing step S150
Produce and penetrate so that workpiece it is final mark effect it is more natural.
It should be pointed out that in one embodiment, input waits for that the step S110 of mark pattern may also include before：Step
Corresponding laser marking parameter is arranged in S100.When it is implemented, before laser processing, the wave of laser 110 is pre-set
Length, repetition rate, pulse width, the focal length for expanding multiple and focus lamp 130 of beam expanding lens 150.
Further, in one embodiment, by the laser of output focus on workpiece with formed label step S170 it
After may also include：Step S190, residue cleaning and burr processing.That is, workpiece surface after laser machining, uses high pressure gas
Rifle or ultrasonic cleaning fall the residues such as the dust of machining area periphery accumulation, and remove contour edge with polishing process
Burr.
Above-mentioned laser marking machine and its marking method, by waiting for that mark pattern carries out dot matrix filling to input, to be formed
The dot pattern 200 being made of the filling point 210 of multiple array arrangements exports, since dot matrix fills the dot pattern 200 to be formed
Each filling point 210 be uniformly, the distribution of rule solve biography so that it is guaranteed that realizing uniform mark effect in workpiece surface
The mode of the line filling of system inputs when mark pattern caused by the filling line bending for constituting output pattern and spacing are uneven
The non-uniform problem of mark effect ensures the exquisite appearance degree of workpiece, substantially increases the mark quality of workpiece；It can fit simultaneously
It should need to be carved on steel mirror surface mould in leather, shoemaking, bullion, commemorative coin, PC etc., identify, coding etc. is beaten
The industry of processing is marked, and the corresponding actual demand for meeting large format mark processing.
Each technical characteristic of above example can be combined arbitrarily, to keep description succinct, not to above-described embodiment
In each technical characteristic it is all possible combination be all described, as long as however, the combination of these technical characteristics be not present lance
Shield is all considered to be the range of this specification record.
Only several embodiments of the present invention are expressed for above example, the description thereof is more specific and detailed, but can not
Therefore it is construed as limiting the scope of the patent.It should be pointed out that for those of ordinary skill in the art,
Under the premise of not departing from present inventive concept, various modifications and improvements can be made, these are all within the scope of protection of the present invention.
Therefore, the protection domain of patent of the present invention should be determined by the appended claims.
Claims (10)
1. a kind of laser marking machine, which is characterized in that including：Laser, galvanometer mechanism, focus lamp and controller, the laser
Device, the galvanometer mechanism and the focus lamp sequentially connect, and the controller is connect with the galvanometer mechanism, and the laser is used
In generation laser；The controller is used to wait for that mark pattern carries out dot matrix filling to input, to be formed by multiple array arrangements
Filling point constitute dot pattern output；The position for each filling point that the galvanometer mechanism is used to be exported according to the controller
Set the deflection of laser described in state modulator；The focus lamp is used to the laser exported from the galvanometer mechanism focusing on workpiece
To form label.
2. laser marking machine according to claim 1, which is characterized in that the controller is for setting the filling point
Density size.
3. laser marking machine according to claim 1, which is characterized in that the controller exists for controlling the filling point
A certain amount of random offset and the size for setting the preset range are carried out in preset range.
4. laser marking machine according to claim 1, which is characterized in that the controller is for controlling the galvanometer mechanism
Disordering processing is carried out to the identification of each filling point.
5. laser marking machine according to claim 1, which is characterized in that further include at least one of following：
Beam expanding lens for the diameter for expanding the laser exported from the laser, the beam expanding lens be set to the laser with
Between the galvanometer mechanism；And
Workbench for carrying the workpiece, the workbench are located at the lower section of the focus lamp.
6. laser marking machine according to claim 1, which is characterized in that the laser is infrared optical fiber laser, and/
Or the focus lamp is F-Theta lens.
7. a kind of marking method, which is characterized in that including：
Input waits for mark pattern；
To waiting for that mark pattern carries out dot matrix filling described in input, to form the dot matrix being made of the filling point of multiple array arrangements
Pattern exports；
The deflection of laser is controlled according to the location parameter of each filling point of output；And
The laser of output is focused on workpiece to form label.
8. marking method according to claim 7, which is characterized in that described pair of the described of input waits for that mark pattern carries out a little
Battle array filling, to further include before forming the step of dot pattern being made of the filling point of multiple array arrangements exports：
The density size of the filling point is set according to the actual demand of mark effect.
9. marking method according to claim 7, which is characterized in that described pair of the described of input waits for that mark pattern carries out a little
Further include after the step of battle array filling, the dot pattern being made of the filling point of multiple array arrangements with formation exports：
It controls the filling point and carries out a certain amount of random offset within a preset range.
10. marking method according to claim 7, which is characterized in that described pair of the described of input waits for that mark pattern carries out
Dot matrix is filled, and further includes after the step of dot pattern being made of the filling point of multiple array arrangements exports to be formed：
Disordering processing is carried out to the identification of each filling point.
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| CN201810322886.XA CN108436283B (en) | 2018-04-11 | 2018-04-11 | Laser marking machine and marking method thereof |
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Cited By (5)
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| CN111531279A (en) * | 2020-05-29 | 2020-08-14 | 青岛星成激光科技有限公司 | Metal surface colorful frosting processing method |
| CN111822849A (en) * | 2019-04-22 | 2020-10-27 | 大族激光科技产业集团股份有限公司 | Laser processing system and processing method |
| CN113369701A (en) * | 2020-03-09 | 2021-09-10 | 大族激光科技产业集团股份有限公司 | Method and device for processing anti-counterfeiting pattern on transparent plastic product |
| CN113618250A (en) * | 2020-05-08 | 2021-11-09 | 大族激光科技产业集团股份有限公司 | Metal marking method |
| WO2022036108A1 (en) * | 2020-08-13 | 2022-02-17 | Standex International Corporation | Pattern editor for generating functional textures |
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