CN105290610A - Optical path focusing device of laser engraving machine - Google Patents

Optical path focusing device of laser engraving machine Download PDF

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Publication number
CN105290610A
CN105290610A CN201510577512.9A CN201510577512A CN105290610A CN 105290610 A CN105290610 A CN 105290610A CN 201510577512 A CN201510577512 A CN 201510577512A CN 105290610 A CN105290610 A CN 105290610A
Authority
CN
China
Prior art keywords
laser engraving
engraving machine
focusing
abbe
auto
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201510577512.9A
Other languages
Chinese (zh)
Inventor
刘喜生
曾强
晁霞
黄艳
黄亚平
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sheng Sheng Electronics Equipment Co Ltd Of Shenzhen
Original Assignee
Sheng Sheng Electronics Equipment Co Ltd Of Shenzhen
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sheng Sheng Electronics Equipment Co Ltd Of Shenzhen filed Critical Sheng Sheng Electronics Equipment Co Ltd Of Shenzhen
Priority to CN201510577512.9A priority Critical patent/CN105290610A/en
Publication of CN105290610A publication Critical patent/CN105290610A/en
Pending legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00Working by laser beam, e.g. welding, cutting or boring
    • B23K26/02Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
    • B23K26/04Automatically aligning, aiming or focusing the laser beam, e.g. using the back-scattered light
    • B23K26/042Automatically aligning the laser beam
    • B23K26/043Automatically aligning the laser beam along the beam path, i.e. alignment of laser beam axis relative to laser beam apparatus

Abstract

The invention belongs to the field of laser equipment, and in particular, relates to an optical path focusing device of a laser engraving machine. The focusing device is installed on a working table of the laser engraving machine, and comprises an abbe auto-collimator (10), a reflecting mirror (11) and a height adjusting device (12), wherein the height adjusting device (12) is fixedly provided with a support plate (13) through threaded connection; one end of the support plate (13) is provided with a telescope support base (14) through threaded connection; the abbe auto-collimator (10) is installed in the telescope support base (14); and a reflecting mirror adjusting frame (15) is installed at the other end of the support plate (13). The optical path focusing device provides a scientific and evidence-based device to the laser engraving machine for searching and determining a focal point, and gets rid of uncertain factors of focal determination by experiences and common senses.

Description

A kind of laser engraving machine light path focusing mechanism
Technical field
The invention belongs to laser equipment field, be specifically related to a kind of laser engraving machine light path focusing mechanism.
Background technology
Since laser comes out, the application expanding day of laser in processing, especially has unique advantage in Precision Machining.
The laser engraving cutter that domestic processor uses a few days ago mainly relies on from the U.S., Japan and Taiwan import, mainly contain Zeus, Witter, Han Madeng company develop this series products, although have technical advantage in the process velocity of lathe, machining accuracy and stability, the working (finishing) area that still there is lathe is little, application is narrow and expensive shortcoming.Although the laser engraving cutter bed that main Ji Jia domestic manufacturers produce accounts in price have advantage, but the state of low side is still in based on carbon dioxide laser engraving machine system, cannot match in excellence or beauty with import lathe in process velocity, machining accuracy and stability three, mainly there is following problem:
(1) lathe does not have automatic focusing function, and the method focusing poor accuracy adopted now.
(2) Laser Processing software is for the algorithm of machining path also in updating, and does not form the optimal algorithm of standard.
(3) hardware aspect design is also immature, there is the defects such as operational capability deficiency, lathe memory storage capacity is little, lathe is not abundant to the interface of host computer, file transfer speed is limited.
(4) overall system design also exist machine tools control panel operation, intelligent not enough, not to the suitable safeguard measure of operating personnel and the floor space significantly shortcoming such as large.
Wherein, the problem of the focusing poor accuracy of laser engraving machine is particularly outstanding, needs improvement badly.
Summary of the invention
In order to overcome above-mentioned technical problem, object of the present invention aims to provide a kind of laser engraving machine light path focusing mechanism, and it accurately can determine the focus of Laser Focusing, thus breaks away from by working experience to determine the uncertainty of focal position.
In order to realize above-mentioned technical purpose, the technical solution used in the present invention is as follows:
A kind of laser engraving machine light path focusing mechanism, described focusing mechanism is arranged on the workbench of laser engraving machine, wherein, described focusing mechanism comprises Abbe auto-collimator (10), speculum (11) and arrangement for adjusting height (12); Described arrangement for adjusting height (12) is threaded connection fixed installation one supporting plate (13), described supporting plate (13) one end is threaded connection installation one telescope supporting seat (14), described Abbe auto-collimator (10) is arranged among telescope supporting seat (14), and regulates the height of Abbe auto-collimator (10) by regulating the screw rod height of telescope supporting seat (14); Described supporting plate (13) other end installs a reflector alignment frame (15), described reflector alignment frame (15) is primarily of fixed head and portable plate composition, speculum (11) is arranged in portable plate, and fixed head to be connected with supporting plate by bolt and can to move freely in supporting plate groove.
Further, the object lens of described Abbe auto-collimator (10) and eyepiece arrange graticle respectively.
Further, described graticle is arranged in telescope tube, and can move forward and backward along lens barrel.
Further, described speculum (11) is arranged on Jing Taozhong, and mirror cover is arranged in portable plate.
Further, described mirror cover adopts aluminum alloy materials to process.
Further, evenly four extension springs are installed between described fixed head and portable plate.
Beneficial effect of the present invention: the present invention is by joining in the light path system of lathe by auto-collimator, the eyepiece focal length of adjustment Abbe auto-collimator is until eyes see the groove in eyepiece on graticle by eyepiece with touching, and the optical axis adjusting Abbe auto-collimator is perpendicular to laser beam axis.When observe in eyepiece surface of the work clearly as time, can focal position be determined.Therefore, the present invention is the device determination focus that laser engraving machine finds that focus provides science, have something to base on, has broken away from by common sense to determine the uncertain factor of focus.
Accompanying drawing explanation
Fig. 1 is a kind of structure of laser carving machine figure in embodiment;
Fig. 2 is the workbench light path system schematic diagram of the laser engraving machine of Fig. 1;
Fig. 3 is focusing system index path schematic diagram of the present invention;
Fig. 4 is focusing mechanism schematic diagram of the present invention;
Fig. 5 is Abbe auto-collimator structural representation of the present invention;
Fig. 6 is telescope supporting seat schematic diagram of the present invention;
Fig. 7 is arrangement for adjusting height schematic diagram of the present invention;
Fig. 8 is reflector alignment frame schematic diagram of the present invention;
Fig. 9 is fixed head and the portable plate structural representation of speculum of the present invention;
Figure 10 is mirror of the present invention cover schematic diagram.
Reference numeral:
100, laser tube; 101, the first scintilloscope; 102, the second scintilloscope
103, the 3rd speculum; 104, laser head; 105, workpiece; 106, workbench;
110, upper cover; 111, pole; 112, laser instrument; 113, the first scintilloscope;
114, control panel; 115, the second speculum; 116, Y-axis track; 117, the 3rd speculum;
118, button fly front; 119, X-axis track;
120, the second speculum; 121, the first speculum; 122, Abbe auto-collimator;
123, surface of the work; 124, condenser lens;
130, speculum; 131, object lens; 132, graticle;
133, eyepiece; 134, light source; 135, division of the graticule;
140, extension spring; 141, speculum; 142, fixed head;
143, portable plate; 144, screw rod;
Detailed description of the invention
The laser instrument of laser engraving machine of the present invention adopts carbon dioxide laser.Due to, CO2 laser is again black light, and inconvenience is with the naked eye directly observed, and the focal position of Laser Focusing cannot directly be measured.In the activity in production of reality, engineer judges that focus determines focus based on experience value.Owing to being theoretically unsound, the focus therefore selected by it is general accurate not, can not meet engraving and the processing needs of degree of precision.This is problem to be solved by this invention.
As Fig. 4, focusing mechanism is mounted on the workbench of laser engraving machine, and wherein, described focusing mechanism comprises Abbe auto-collimator 10, speculum 11 and arrangement for adjusting height 12; Described arrangement for adjusting height 12 is threaded connection fixed installation one supporting plate 13, described supporting plate 13 one end is threaded connection installation one telescope supporting seat 14, described Abbe auto-collimator 10 is arranged among telescope supporting seat 14, and regulates the height of Abbe auto-collimator 10 by regulating the screw rod height of telescope supporting seat 14; Described supporting plate 13 other end installs a reflector alignment frame 15, and described reflector alignment frame 15 is primarily of fixed head and portable plate composition, and speculum 11 is arranged in portable plate, and fixed head to be connected with supporting plate by bolt and also can to move freely in supporting plate groove.
As shown in Figure 5, the object lens of Abbe auto-collimator (10) and eyepiece arrange graticle respectively.Described graticle is arranged in telescope tube, and can move forward and backward along lens barrel, and " rich " cross hair carved by graticle, graticle is centrally located on optical axis.During operation Abbe auto-collimator (10), adjustment eyepiece stalk can change the distance between eyepiece and graticle, and cross hair is positioned on the focal plane of eyepiece.Object lens are fixed on the other end of telescope tube, and be the two cemented objective of achromatism, focal length is 168mm, and clear aperture is 25mm.Adjustment graticle adjusting handle can change the distance between object lens and graticle, and graticle cross hair is positioned on the focal plane of object lens.The focal length of Abbe eyepiece is 24.3mm, and multiplication factor is 7.In Abbe eyepiece, one 45 degree total reflection right-angle prisms are housed between eyepiece and graticle.Be affixed below the right-angle surface of right-angle prism and graticle cross hair.Observe from eyepiece, the sub-fraction of cross hair is covered by prism.Prism is generally carve a printing opacity cross hairs after entirely aluminizing, the light microscopic prism indirect illumination cross hair that miniature bulb sends.When cross hair is in the focal plane of object lens, the light sent by little cross hairs becomes directional light and is penetrated by object lens after object lens.During auto-collimation, picture and the little cross hairs of little cross hairs are symmetrical relative to optical axis.The present invention adopts each component parameter of Abbe auto-collimator (10) as follows: optical tube length 180mm; Aperture of objective lens: 25mm; Focal length: 168mml eyepiece focal length: 24.3mm; Eyepiece bore: 8mm; Multiplication factor: 6.91; Imaging: inverted image; The angle of visual field: 1.30 '; Graticle displacement: 26mm; Range of ocular accomodation: 5mm.
As shown in Fig. 8 to Figure 10, the effect of speculum in light path system changes turning to of optical axis.Speculum (11) is arranged on Jing Taozhong, and mirror cover is arranged in portable plate.Further, described mirror cover adopts aluminum alloy materials to process.Further, evenly four extension springs are installed between described fixed head and portable plate.Speculum is arranged on portable plate, and fixed head bolt is connected with the supporting plate of bracing or strutting arrangement, can move in the groove of supporting plate.4 high-performance extension springs are installed between two plates reset.Two plates take supporter as fulcrum, regulate and adjust the pitch angle that screw rod can change portable plate up and down, regulate left and right adjusting screw rod can change the right and left parallactic angle of portable plate.
As shown in Figure 7, arrangement for adjusting height in order to accommodation reflex mirror and telescopical height and laser optical path contour.
As shown in Figure 1 to Figure 3, light path system and the workbench light path system of apparatus of the present invention coordinate, and determine focus with this.Of the present inventionly determine that focus flow process is as follows:
First telescope is regulated:
1, the focusing of eyepiece: object makes eyes can be clear that the groove in eyepiece on graticle by eyepiece.Focus adjustment method is that eyepiece is rotated gently in lens barrel, thus changes the distance of eyepiece and graticle, until see division of the graticule imaging clearly from eyepiece.
2, telescopical focusing: the object of telescope focusing adjusts on the focal plane of object lens by the cross hairs on eyepiece graticule, namely to infinity focusing, its method is as follows:
1. first connect the miniature bulb in telescope ocular, eyepiece is thrown light on.
2., before plane mirror being placed on telescope objective, level crossing is perpendicular to telescope optic axis, and telescopical reflection image and telescope are on the same line.
3. observe in eyepiece, now can see a speck, rotate graticle adjusting handle along optical axis direction, to telescope objective focusing, make bright cross hairs imaging clearly.Then utilize the angle of the trimming bolt of speculum to level crossing to do fine adjustments, bright cross hairs is adjusted to and overlaps with the cross hairs above graticle, move back and forth graticle, bright cross hairs and cross no parallax are overlapped.
Now, graticle is positioned on the focal plane of eyepiece and object lens simultaneously, can be used for observing directional light.
Then telescope optic axis is adjusted perpendicular to laser beam axis:
Focusing mechanism is put on the workbench of laser engraving cutter, range estimation coarse adjustment.The riding position of telescope in laser engraving cutter.Adjustment arrangement for adjusting height feed screw nut, makes telescope move up and down, adjustment telescope optic axis and laser axis contour.Rotate telescope, make telescope optic axis vertical with laser beam axis, fastening nut.Adjustment reflector mount fixed head becomes miter angle with x direction.Fine tuning is carried out with secondary light source.Below focus lamp, place an infrared light light source, send and be similar to directional light, vertical irradiation is in the center of condenser lens.Incide in telescope after this light beam line focus mirror and two speculum reflections.Because this light beam is visible ray, so incidence point when it is irradiated to each minute surface is visible.Careful adjustment height and mirror corners, make light beam incidence point in each minute surface center.Adjustment fine setting screw rod, makes the light through its reflection incide in telescope along telescopical optical axis.So far focusing system adjustment is complete.
Finally determine focal position:
After light path adjustment, the workpiece below laser head pastes one piece of graph paper.The distance of manual adjustment laser head and surface of the work, observes at telescopical eyepiece simultaneously, when observe in eyepiece groove on graph paper clearly as time, stop adjustment laser head.Now, focus be exactly eyepiece can observe groove on graph paper clearly as position.
Above-mentioned listed specific implementation is nonrestrictive, and to one skilled in the art, not departing from the scope of the invention, the various modifications and variations of carrying out, all belong to protection scope of the present invention.

Claims (6)

1. a laser engraving machine light path focusing mechanism, described focusing mechanism is arranged on the workbench of laser engraving machine, it is characterized in that: described focusing mechanism comprises Abbe auto-collimator (10), speculum (11) and arrangement for adjusting height (12); Described arrangement for adjusting height (12) is threaded connection fixed installation one supporting plate (13), described supporting plate (13) one end is threaded connection installation one telescope supporting seat (14), described Abbe auto-collimator (10) is arranged among telescope supporting seat (14), and regulates the height of Abbe auto-collimator (10) by regulating the screw rod height of telescope supporting seat (14); Described supporting plate (13) other end installs a reflector alignment frame (15), described reflector alignment frame (15) is primarily of fixed head and portable plate composition, speculum (11) is arranged in portable plate, and fixed head to be connected with supporting plate by bolt and can to move freely in supporting plate groove.
2. a kind of laser engraving machine light path focusing mechanism according to claim 1, is characterized in that: object lens and the eyepiece of described Abbe auto-collimator (10) arrange graticle respectively.
3. a kind of laser engraving machine light path focusing mechanism according to claim 2, is characterized in that: described graticle is arranged in telescope tube, and can move forward and backward along lens barrel.
4. a kind of laser engraving machine light path focusing mechanism according to claim 1, is characterized in that: described speculum (11) is arranged on Jing Taozhong, and mirror cover is arranged in portable plate.
5. a kind of laser engraving machine light path focusing mechanism according to claim 4, is characterized in that: described mirror cover adopts aluminum alloy materials to process.
6. a kind of laser engraving machine light path focusing mechanism according to claim 1, is characterized in that: evenly install four extension springs between described fixed head and portable plate.
CN201510577512.9A 2015-09-11 2015-09-11 Optical path focusing device of laser engraving machine Pending CN105290610A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201510577512.9A CN105290610A (en) 2015-09-11 2015-09-11 Optical path focusing device of laser engraving machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201510577512.9A CN105290610A (en) 2015-09-11 2015-09-11 Optical path focusing device of laser engraving machine

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CN105290610A true CN105290610A (en) 2016-02-03

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109927394A (en) * 2017-12-16 2019-06-25 绍兴豪春纺织科技有限公司 A kind of blue light net making machine
CN110109241A (en) * 2018-02-01 2019-08-09 杨景州 Telescope and focusing piece
CN110651218A (en) * 2017-04-04 2020-01-03 恩耐公司 Optical reference generation for galvanometer scanner calibration

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Publication number Priority date Publication date Assignee Title
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CN104575210A (en) * 2014-12-08 2015-04-29 山东科技大学 Spectrometer based on CCD imaging and adjusting method thereof

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Publication number Priority date Publication date Assignee Title
CN2503455Y (en) * 2001-09-30 2002-07-31 秦庚生 Auto-collimator
CN1811519A (en) * 2006-03-01 2006-08-02 四川大学 Laser guiding focusing device for telescope
CN201110761Y (en) * 2007-09-05 2008-09-03 中国船舶重工集团公司第七一一研究所 Laser centering and collimating system
CN102928942A (en) * 2012-11-20 2013-02-13 江南大学 Optical path adjusting device
CN203134230U (en) * 2013-03-01 2013-08-14 宁波大学 Spectrometer used in experiment
CN104575210A (en) * 2014-12-08 2015-04-29 山东科技大学 Spectrometer based on CCD imaging and adjusting method thereof

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110651218A (en) * 2017-04-04 2020-01-03 恩耐公司 Optical reference generation for galvanometer scanner calibration
CN109927394A (en) * 2017-12-16 2019-06-25 绍兴豪春纺织科技有限公司 A kind of blue light net making machine
CN110109241A (en) * 2018-02-01 2019-08-09 杨景州 Telescope and focusing piece

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Application publication date: 20160203