CN1171358A - Anti-forger laser marking machine and its marking method - Google Patents
Anti-forger laser marking machine and its marking method Download PDFInfo
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- CN1171358A CN1171358A CN 96110257 CN96110257A CN1171358A CN 1171358 A CN1171358 A CN 1171358A CN 96110257 CN96110257 CN 96110257 CN 96110257 A CN96110257 A CN 96110257A CN 1171358 A CN1171358 A CN 1171358A
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Abstract
An antiforgery laser marking machine is composed of solid pulse laser device, lens set for beam diffusion, focusing lens, scan bench and computer control system. Said scan bench is driven by step motor through a motion pair of leading screw and nut. A shielding mask and its fixing stand are arranged on the optical path between diffusion and focusing lenses. A retrace interval eliminating mechanism is set up in the motion pair of leading screw and nut. During marking, laser beam scans workpiece along at least one axis and each dot of scanned graphics is a micro characteristic marker conforming with mark pattern, so being hidden very well and impossible to be forged.
Description
The present invention relates to laser process equipment and process technology.
Laser marking is a kind of important laser processing technology, and it is not subjected to workpiece material restriction, be not subjected to that the restriction of workpiece shape, mark can forever retain, the degree of automation advantages of higher.Existing laser marking mode can be divided into scan-type (also claiming dot matrix or Writing type) and mask-type two classes.As disclosing a kind of laser marking machine among the patent No. CN92200956.2, this machine adopts X-Y servoscribe mechanism, laser beam forms the dot matrix mark in surface of the work scanning, and the dot matrix mark is formed character or pattern, but each point all is a simple round spot and do not have the further feature figure in the dot matrix.Disclose a kind of laser-induced thermal etching machine among the patent No. CN90212683.0, it has covered the shadow mask with special pattern at surface of the work, and laser beam partly carries out etching and processing to surface of the work by its logical light.The figure of formed mark of this marking method and mask is in full accord, but it can not etch any pattern or the character different with mask graph.Do not see the report of the laser marking method that scan-type and mask-type are combined so far as yet.
The object of the present invention is to provide a kind of mark machine and marking method thereof that scanning type laser mark and the miniature mark of mask-type laser is incorporated into one, making the macroscopical dot character got or in the pattern each form point all is the micro-features mark consistent with mask graph, make the figure of the regularity of distribution of its macroscopical dot matrix and micro-features mark have disguised and very strong can not imitation property, thereby have unique antifalse effect.
Purpose of the present invention is realized by following mode.
Described laser anti-counterfeit mark machine, comprise pulsed solid stale laser, expanded beam lens group, condenser lens, be used to install the scanning workbench of workpiece and the computer control system of gated sweep campaign, described bench board is by the stepping motor more than two or two, do two dimensional motion or three-dimensional motion via the transmission kinematic pair drive that screw mandrel, nut constitute, it is characterized in that the light path between expanded beam lens group and the condenser lens is provided with shadow mask and fixed support thereof.
In order to improve the thrifty surely precision that repeats of bench board, the present invention is provided with the mechanism that can eliminate screw thread backhaul gap in the described transmission kinematic pair that is made of screw mandrel, nut; Simultaneously in order to improve the visibility of micro marks on the workpiece, among the present invention also with non-spherical lens as condenser lens, thereby reduced aberration, make image enough clear.The described backhaul clearance mechanism that disappears constitutes like this: it include cooperate with wire rod thread about two nuts, between two nuts, be provided with the stage clip that is compressed distortion, left side nut contacts with the right flank cooperation of wire rod thread, the right nut contacts with the left surface cooperation of wire rod thread, thereby when bench board is moved to the left or to the right, by left and right sides nut difference transferring power, eliminated the backhaul gap error that brings because of thread pitch.
In common feed screw nut's transmission is paid, owing to sides such as working accuracys and reason always exist thread pitch.Therefore, more existing laser marking machines, the repetitive positioning accuracy of its bench board is not high: laser beam always exists certain aberration by the saturating border of common spherical surface focusing group on the other hand, thereby has influenced the visibility of micro marks pattern on the workpiece.Because the deficiency of this two aspect, therefore in actual use, the situation that scan-type mark and mask-type mark are used in combination does not appear.Used feed screw nut's transmission device of being with the backhaul gap that disappears among the present invention, made the resetting error≤0.005mm of bench board; Utilize non-spherical lens as condenser lens, improved the fidelity of laser beam transverse distribution state, all can the complete figure that clearly reflects mask when the micro-features that this laser marking machine is formed at surface of the work is marked at its dimension 〉=0.3mm.Thereby realized scanning type laser mark and mask-type mark are combined into one.
Utilize the method for this laser marking machine mark, comprise and make laser emission pulse laser bundle, through shining behind expansion speed set of lenses, shadow mask, the condenser lens on the surface of the work that is placed on the bench board, also comprise by computer controlled direction of scanning, scanning speed etc. in the described method.It is characterized in that, described workpiece scans described laser beam along at least one, each the single character or the pattern that form the lattice scanning figure on the workpiece all are made up of the scanning spot set, and each composition point all is the micro marks identical with mask graph.
Compared with prior art, utilize this method to carry out false proof mark, not only be not subjected to advantages such as workpiece material, the restriction of shape; And since in its scanning lattice each point all have high accuracy of positioning, therefore and each point all is the micro-features mark with given shape, has the antifalse effect that is difficult to the uniqueness of copying more.
Be further described with accompanying drawing in conjunction with the embodiments down.
Fig. 1 is the scheme drawing of a kind of embodiment of described laser marking machine.Among the figure, the laser beam of launching from pulse laser (1) shines on the shadow mask (3) through expansion speed set of lenses (2), after shadow mask penetrates, have laser beam with the identical figure of shadow mask behind completely reflecting mirror (7) and condenser lens (6), shine on the bench board (5), this bench board can be done the scanning motion of X-Y direction under the control of microcomputer (4).Described laser is made up of laser bar (15), Q switched element (11), outgoing mirror (10), completely reflecting mirror (12), xenon lamp (16) and Laser Power Devices (17).Because the laser beam that described solid statelaser sends is sightless infrared light, in order to regulate light path, increased Hc-Nc laser (8) at the rear portion of this laser, light hurdle (9), completely reflecting mirror (13), (14) can be regulated light path easily and indicate locating point.
Fig. 2 is the structural scheme of mechanism in described elimination wire rod thread backhaul gap.Among the figure, (18) be the screw mandrel that the rotating shaft with stepping motor is connected, be connected on the bench board with the contacted nut of its screw thread right flank (19), this nut has a stepped hole, stage clip (20) and right nut (22) are arranged in the hole, this right side nut is connected on the nut (19) by screw (21), and the screw thread of palpus assurance nut (22) and the left surface of wire rod thread are kept in touch when screwing the nut nail, and make stage clip (20) at the compressive deformation state.
Claims (5)
1. laser anti-counterfeit mark machine, the solid statelaser, expanded beam lens group, the condenser lens that comprise the emission pulse laser bundle, be used for the scanning workbench of place work piece and the computer control system of gated sweep campaign, described bench board is by the stepping motor more than two or two, do two dimensional motion or three-dimensional motion via the transmission kinematic pair drive that the feed screw nut constitutes, it is characterized in that the light path between extender lens and the condenser lens is provided with shadow mask and fixed support thereof.
2. mark machine as claimed in claim 1 is characterized in that being provided with the mechanism that can eliminate screw thread backhaul gap in the described transmission kinematic pair that is made of the feed screw nut.
3. mark machine as claimed in claim 1 is characterized in that described condenser lens is a non-spherical lens.
4. laser anti-counterfeit mark machine as claimed in claim 2, it is characterized in that the described backhaul clearance mechanism that disappears includes left and right two nuts that cooperate with wire rod thread, between two nuts, be provided with the stage clip that is compressed distortion, left side nut is cooperated with the wire rod thread right flank all the time contact, the right nut contacts with the screw thread left surface cooperation of screw mandrel all the time.
5. marking method that uses the described mark machine of claim 1, comprise and make laser emission pulse laser bundle, through expanded beam lens group, shadow mask, shine behind the condenser lens on the surface of the work that is placed on the bench board, the direction of scanning that also comprises the Control work platform that uses a computer, scanning speed, it is characterized in that, described workpiece scans described laser beam along at least one, each the single character or the pattern that form the lattice scanning figure on the workpiece all are made up of the scanning spot set, and each forms point all is the micro-features mark identical with mask graph.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96110257 CN1171358A (en) | 1996-07-22 | 1996-07-22 | Anti-forger laser marking machine and its marking method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96110257 CN1171358A (en) | 1996-07-22 | 1996-07-22 | Anti-forger laser marking machine and its marking method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1171358A true CN1171358A (en) | 1998-01-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 96110257 Pending CN1171358A (en) | 1996-07-22 | 1996-07-22 | Anti-forger laser marking machine and its marking method |
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| CN (1) | CN1171358A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101332722B (en) * | 2007-06-28 | 2010-08-11 | 豪晶科技股份有限公司 | Component carrying device of laser mark printing machine |
| CN102785029A (en) * | 2012-08-05 | 2012-11-21 | 温州大学 | Laser anti-counterfeit marking method for product with complex profile |
| CN102886601A (en) * | 2011-07-21 | 2013-01-23 | 深圳市通发激光设备有限公司 | Laser welding machine provided with dynamic diaphragm device |
| CN103010539A (en) * | 2012-12-28 | 2013-04-03 | 北京中棉机械成套设备有限公司 | Automatic online marking system for cotton bags and marking method |
| CN103287119A (en) * | 2012-02-28 | 2013-09-11 | 深圳市大族激光科技股份有限公司 | Laser marking machine |
| CN105116554A (en) * | 2015-09-08 | 2015-12-02 | 上海嘉强自动化技术有限公司 | Efficient continuous beam expanding focusing system |
-
1996
- 1996-07-22 CN CN 96110257 patent/CN1171358A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101332722B (en) * | 2007-06-28 | 2010-08-11 | 豪晶科技股份有限公司 | Component carrying device of laser mark printing machine |
| CN102886601A (en) * | 2011-07-21 | 2013-01-23 | 深圳市通发激光设备有限公司 | Laser welding machine provided with dynamic diaphragm device |
| CN103287119A (en) * | 2012-02-28 | 2013-09-11 | 深圳市大族激光科技股份有限公司 | Laser marking machine |
| CN103287119B (en) * | 2012-02-28 | 2015-12-16 | 大族激光科技产业集团股份有限公司 | Laser marking machine |
| CN102785029A (en) * | 2012-08-05 | 2012-11-21 | 温州大学 | Laser anti-counterfeit marking method for product with complex profile |
| CN102785029B (en) * | 2012-08-05 | 2014-08-06 | 温州大学 | Laser anti-counterfeit marking method for product with complex profile |
| CN103010539A (en) * | 2012-12-28 | 2013-04-03 | 北京中棉机械成套设备有限公司 | Automatic online marking system for cotton bags and marking method |
| CN103010539B (en) * | 2012-12-28 | 2014-07-30 | 北京中棉机械成套设备有限公司 | Automatic online marking system for cotton bags and marking method |
| CN105116554A (en) * | 2015-09-08 | 2015-12-02 | 上海嘉强自动化技术有限公司 | Efficient continuous beam expanding focusing system |
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| WD01 | Invention patent application deemed withdrawn after publication |