CN101462204A - Cigarette tipping paper laser boring method and apparatus - Google Patents
Cigarette tipping paper laser boring method and apparatus Download PDFInfo
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- CN101462204A CN101462204A CN 200910060542 CN200910060542A CN101462204A CN 101462204 A CN101462204 A CN 101462204A CN 200910060542 CN200910060542 CN 200910060542 CN 200910060542 A CN200910060542 A CN 200910060542A CN 101462204 A CN101462204 A CN 101462204A
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Abstract
The invention provides two methods and equipment for laser punching of cigarette tipping paper. One is a rotary multi-prism punching method and equipment; and the other one is a vibrating mirror punching method and equipment. The methods and the equipment can utilize optical equipment to focus laser output by a laser; and punch pores (15) which are distributed in a single-row or multi-row curve or repeated pattern on the surface of continuously-moving tipping paper (9), such as pores (15) distributed in triangular, jagged, rhombic, trapezoidal, sine or cosine arrangement. The methods can carry out high-speed curve punching on the tipping paper, has the punching speed which is the same as linear punching speed and has good machining efficiency and good product quality; and the equipment has a simple structure, long service life, stable operation and high utilization efficiency of laser energy.
Description
Technical field
The present invention relates to a kind of laser drilling field, particularly relate to a kind of cigarette tipping paper laser boring method and equipment.
Background technology
Smoking is harmful to your health is admitted facts, reduces tar content to improving the healthy significant of smoking colony.The cigarette manufacturer of various countries has dropped into great amount of manpower and material resources and a huge sum of money in succession, and extensive and deep research has been carried out in the aspects such as technology, theoretical method and application in practice that reduce cigarette tar content, has adopted the multiple burnt technology of falling.
Cigarette tipping paper is as the special-purpose external packing paper of cigarette filter, because of its outer appearnce pine line yew paper of once gaining the name seemingly.The principle of filter tip ventilation dilution technology is by punching on yew paper, uses high-air-permeability filter stick formation paper or make mode such as groove on filter stick, dilute thereby when smoking cigarette, extraneous air is entered in the filter tip and to main flume, the tar content that sucks human body is reduced relatively.This technology has become in the world the most extensive and the most effective burnt technology of falling that adopts.Have at present on cigarette about 90% and the market, West Europe about 80% cigarette all adopt the ventilation filter tip on the U.S. cigarette market, the ventilation filter tip cigarette of the states such as Japan in Asia also occupies suitable vast scale in addition.This is simple, ripe and fall burnt technology very reliably to adopt the ventilation filter tip, it is also fairly obvious that it falls burnt effect, reduce CO more than 70% up to more than 80% as reducing tar content in cigarette behind the U.S. Carlton board cigarette employing ventilation filter tip, and, also make the smoking quality of this cigarette keep higher level by strengthening perfuming, reinforced measure.
The ratio of China's cigarette with filter tip has reached 95% at present.Along with the mankind for the raising day by day that health of smokers protection requires, can effectively reduce tar content, reduce nicotine and the yew paper drilling technology that health of people does not have an injury is obtained popularizing rapidly.Wherein, adopt laser boring technology to have the developing direction that multinomial advantage will become yew paper industry because of it.
The yew paper hole knockout of development and utilization at present mainly contains technologies such as mechanical punching, electric spark-erosion perforation, laser boring, and wherein laser boring becomes the mode that extensively adopts in the world owing to have the high and accuracy height of stability.
Laser boring is the high power density characteristics of utilizing laser emission, and it is focused on heating yew paper, makes yew paper part reach vapourizing temperature, the vaporization pore-forming.
Released the tipping paper laser beam drilling machine product at present, the serial tipping paper laser beam drilling machine of developing with the Germany and the Chinese Central China University of Science and Technology is main representative, is the linear pattern punching, and promptly each road laser can only be fixed and make a call to a round, and every round is straight line.The figure hole is beaten in Yuxi Jincan Technology Co., Ltd (200410036764.2) proposition on yew paper trial, but concrete implementation method is not provided in the patent.
Summary of the invention
Technical problem to be solved by this invention is: a kind of cigarette tipping paper laser boring method is provided, and this method can be carried out the punching of high speed curve, and punching speed can reach the same speed of linear pattern punching.A kind of cigarette tipping paper laser boring equipment that can realize described laser boring method is provided simultaneously, and this equipment can carry out high-speed ventilation micropore curve or the laser boring of pattern arrangement type on yew paper, and simple in structure, working stability and working (machining) efficiency height.
The present invention solves its technical problem and adopts following technical scheme:
The invention provides following two kinds of cigarette tipping paper laser boring methods and equipment thereof.
1. rotate polygon prism formula drilling method:
Specifically: with the continuous laser beam of continuous wave laser output, after one group of optics semi-transparent semi-reflecting lens and total reflective mirror beam split, form the pulse laser beam that priority is arranged on the multichannel sequential by rotary polygon prism scanning beam split, after focusing on by a plurality of focus heads respectively again, form a plurality of focal spots of bright dipping successively on the surface of the yew paper of continuous motion, these focal spots make yew paper get the aperture of single row or multiple rows curve or repetitive pattern arranged distribution.
2. mirror-vibrating drilling method:
Specifically: with the pulse laser beam of pulse laser output earlier after after galvanometer scanning system scanning and F-θ lens focus on, in the scanning of the yew paper surface formation focal spot of continuous motion; The deflection angle that computer is controlled X-axis scanning galvanometer, Y-axis scanning galvanometer in the different galvanometer scanning systems constantly according to the curve or the graphical distribution of input in advance, then on sequential, realize the curve or the scanning of graphical distribution form of yew paper surface focal spot, and yew paper is got the aperture of single row or multiple rows curve or repetitive pattern arranged distribution.
3. realize the equipment of rotation polygon prism formula drilling method:
This equipment is made up of the paper advance mechanism of continuous wave laser, optical transform mechanism and the continuous motion of driving yew paper, wherein: optical transform mechanism is by optics semi-transparent semi-reflecting lens, total reflective mirror, rotary polygon prism, and being installed in a plurality of focus heads formations paper advance mechanism top, that be the non-linear arrangement with focusing function, the optical axis of each focus head is all vertical with yew paper surface; Scanning enters in corresponding with it a plurality of focus heads the continuous laser beam of described laser instrument output through polygon prism, and focus on the back forms the priority bright dipping on the surface of the yew paper of continuous motion a plurality of focal spots by it, yew paper is got the aperture of single row or multiple rows curve or repetitive pattern arranged distribution.
4. realize the equipment of mirror-vibrating drilling method:
This equipment is provided with galvanometer scanning system, pulse laser, F-θ lens, computer, paper advance mechanism, and wherein: paper advance mechanism is made of wind-up roll and let off roll, the yew paper that their clampings are to be processed; The pulse laser of pulse laser output, after focusing on the back, the X-axis scanning galvanometer in the galvanometer scanning system, the reflection of Y-axis scanning galvanometer and F-θ lens on yew paper, form a focal spot earlier, this focal spot scans on the yew paper surface of continuous motion according to predefined curve in the computer or graphical distribution form on sequential, makes yew paper get the aperture of described curve or repetitive pattern arranged distribution.
The present invention compared with prior art mainly contains following advantage:
(1) can carry out the punching of high speed curve on yew paper, punching speed can reach the same speed of linear pattern punching.
(2) ventilative micropore on the yew paper is arranged in simple repetition curve or figure, the linear pattern before being different from is arranged, and has functions such as good looking appearance is changeable, false proof.The pore size distribution that can adjust variation can provide the different air-flow distribution forms of filter tip ventilation, so that the more controlled burnt effect of falling to be provided.
(3) adopt the polygon prism spectrophotometric device, continuous laser beam is divided into the multipath pulse laser output of order bright dipping, so utilization ratio of laser energy height, simple in structure, long service life, production are safeguarded easily.
(4) adopt high speed to rotate polygon prism and carry out beam split, the pulse laser of continuous laser beam demultiplexing high repetition frequency can be exported, so punching speed is fast, efficient is high.
(5) adopt the different spaces of multichannel focus head to arrange the result, can make therefore that device structure is simple, working stability to obtain the hole of different curves or graphical distribution form.
(6) the spatial arrangement position of each focus head can onlinely be regulated, and realizes the multiple curve or the graphical distribution of ventilative micropore on the yew paper.
In a word, the present invention can carry out high speed curve punching on yew paper, and punching speed is fast, the working (machining) efficiency height, and good product quality, and the device structure that provides is simple, long service life, working stability and laser energy utilizing rate height.
Description of drawings
Fig. 1 is that rotation polygon prism formula laser drilling system is formed schematic diagram.
Fig. 2 is that the laser focusing head teeter realizes curve punching schematic diagram.
Fig. 3 is the location diagram of focus head when adopting a plurality of focal spots to realize a sawtooth curve distribution.
Fig. 4 adopts a plurality of focal spots to realize that a sawtooth curve distributes.
Fig. 5 is the location diagram that a plurality of focus heads divide three rows to be arranged in parallel.
Fig. 6 is the location diagram of focus head when adopting a plurality of focal spots to realize a sine curve distribution.
Fig. 7 adopts a plurality of focal spots to realize that a sine curve distributes.
Fig. 8 is that the polygon prism beam split realizes that a plurality of orders go out light pulse.
Fig. 9 adopts single focus lamp to realize that a plurality of focus points focus on simultaneously.
Figure 10 is the location diagram of focus head when adopting curve cycle of a plurality of focal spots interval to realize a sawtooth curve distribution.
Figure 11 adopts the sawtooth curve distribution of a curve cycle realization at interval of a plurality of focal spots.
Figure 12 is that the galvanometer technology realizes the beam flying schematic diagram.
Figure 13 is that the vibration mirror scanning type laser drilling system is formed schematic diagram.
Figure 14 is the photoelectric encoder fundamental diagram.
Among the figure: 1. continuous wave laser; 2. optical transform mechanism; 3. paper advance mechanism; 4. optics semi-transparent semi-reflecting lens; 5. total reflective mirror; 6. continuous laser beam; 7. polygon prism; 8. focus head; 9. yew paper; 10. wind-up roll; 11. let off roll; 12. galvanometer; 13. focus lamp; 14. parabolic mirror; 15. aperture; 16. galvanometer scanning system; 17.X axle scanning galvanometer; 18.Y axle scanning galvanometer; 19.X repacking flowmeter; 20.Y repacking flowmeter; 21. pulse laser; 22. pulse laser; 23.F-θ lens; 24. computer; 25. photoelectric encoder; 26. disconnected paper detecting apparatus; 27. grating dish; 28. photoelectric detection system; 29. rectangle slit; 30. grating dish rotating shaft; 31. light-emitting component; 32. receiving element; 33. signal processing circuit; 34. signal output apparatus.
The specific embodiment
The invention provides two kinds of cigarette tipping paper laser boring methods, is respectively rotation polygon prism formula drilling method and mirror-vibrating drilling method.The present invention also provides two kinds of equipment realizing described method.
The invention will be further described below in conjunction with embodiment and accompanying drawing.
One. rotation polygon prism formula drilling method
Referring to Fig. 1, this method is: with the continuous laser beam of continuous wave laser 1 output, after one group of optics semi-transparent semi-reflecting lens 4 and total reflective mirror 5 beam split, form the pulse laser beam that priority is arranged on the multichannel sequential by rotary polygon prism 7 (hereinafter to be referred as polygon prism 7) scanning beam split, after focusing on by a plurality of focus heads 8 respectively again, form a plurality of focal spots of bright dipping successively on the surface of the yew paper 9 of continuous motion, these focal spots make yew paper get the aperture 15 of single row or multiple rows curve or repetitive pattern arranged distribution.
The present invention rotates polygon prism formula drilling method and can punch to yew paper 9 according to following step:
A. by the wind-up roll 10 and the let off roll 11 clamping yew paper 9 of paper advance mechanism 3.
B. regulate the locus of a plurality of focus heads 8, make it above yew paper 9, be the non-linear arrangement, should guarantee in the adjustment process that the optical axis of each focus head is all vertical with yew paper surface along the yew paper direction of motion with perpendicular to the yew paper direction of motion;
C. start PLC, the wind-up roll 10 in the paper advance mechanism 3 is rotated by the rotating speed of setting, drive the continuous motion of yew paper.
D. continuous wave laser 1 can adopt continuous CO
2Laser instrument, the continuous laser beam of its output through one group of optics semi-transparent semi-reflecting lens 4 and total reflective mirror 5 beam split after, be divided into the continuous laser beam 6 that two beam energies equate, a branch of continuous laser beam 6 shines certain working face of the polygon prism 7 of rotation at a high speed, and several border factually, polygon prism limit situation here can adopt 8～90 limits.
C. this working surface of polygon prism 7 in rotary course with the inswept successively a plurality of focus heads of continuous laser beam (for example 16 focus heads), each focus head 8 all receives a part of laser when laser is inswept, when inswept successively 16 focus heads of laser, be equivalent to distribute a laser pulse like this to each focus head.When polygon prism 7 rotations, each face of polygon prism distributes a pulse all for all focus heads, and so in fact rotary polygon prism is equivalent to a continuous laser is partitioned into 16 road pulse lasers, focuses on by 16 focus heads 8.The quality that focuses on is good more, and the effect of punching is high more.To there be pulse laser successively to export on the continuous laser beam demultiplexing sequential that enter during polygon prism 7 multiple scannings.Wherein in each focus head 8 total reflective mirror 5 and focus lamp 13 are installed all, its effect is at first the direction of the pulsed light beam that enters to be changed into perpendicular to yew paper 9 surfaces, by focus lamp 13 it is focused on the yew paper 9 then and punches.
F. by the multipath pulse laser of polygon prism 7 output respectively after a plurality of focus heads 8 focus on, a plurality of focal spots in the 9 surperficial formation order bright dippings of yew paper, under the centralized Control of PLC to the rotating speed of the wind-up roll in the paper advance mechanism 3 10, polygon prism rotating speed, a plurality of focal spots of bright dipping punch to yew paper in order, make and form the aperture 15 with described curve or graphical distribution arrangement on the yew paper.
The rate travel of yew paper 9 is controlled by PLC by the wind-up roll in the paper advance mechanism 3 10.In each focus head 8 the assist gas injection apparatus is housed all, is used for the yew paper material of vaporization is blown away, keep the production line cleaning.
The switch of continuous wave laser 1 and watt level, the rotating speed of polygon prism 7, the slewing rate of wind-up roll 10 in the paper advance mechanism 3, the horizontal longitudinal translation of each focus head 8 and assist gas injection apparatus wherein all can be adjusted control.
When needs adopt complicated figure, may need continuous laser is divided into a lot of roads, for example 32 the tunnel, can directly utilize this moment rotation polygon prism 7 with the continuous CO of high power
2Laser instrument is divided into 32 road pulsed light beams, also can be earlier with the continuous CO of high power
2The light of laser instrument output is through one group of optics semi-transparent semi-reflecting lens 4 and total reflective mirror 5, and being divided into the M beam energy is the continuous laser beam 6 of elementary beam 1/M, utilizes M polygon prism 7 respectively M bundle continuous laser beam 6 to be carried out beam split again.Example among Fig. 1 is with the continuous CO of high power
2Laser Output Beam is divided into the continuous laser beam 6 that two bundles equate through one group of optics semi-transparent semi-reflecting lens 4 and total reflective mirror 5, two-beam respectively is divided into 16 road pulsed light beams by two polygon prisms respectively, totally 32 road pulse lasers focus on the yew paper 9 with constant speed movement by focus lamp, get 32 row's air-vents on this yew paper.
32 tunnel holes can directly be made a call to by this system under the normal conditions.When every dish requires to make a call to two rounds, 32 road pulse lasers can be divided into two groups, form a figure with 16 focal spots respectively, can directly realize two row's curves or figure punching like this, efficient is very high.
Two. the mirror-vibrating drilling method
Referring to Figure 13, the online marking on the fly technology type of this method and laser seemingly, specifically: with the pulse laser beam 22 of pulse laser 21 output earlier after after galvanometer scanning system 16 scannings and F-θ lens 23 focus on, in the scannings of the yew paper 9 surface formation focal spots of continuous motion; The deflection angle that computer 24 is controlled X-axis scanning galvanometer 17, Y-axis scanning galvanometer 18 in the different galvanometer scanning systems 16 constantly according to the curve or the graphical distribution of input in advance, then on sequential, realize the curve or the scanning of graphical distribution form of yew paper 9 surperficial focal spots, and yew paper is got the aperture 15 of single row or multiple rows curve or repetitive pattern arranged distribution.
Mirror-vibrating drilling method of the present invention can punch to yew paper by following step:
A. input curve or graphical distribution in advance in computer 24;
B. by the wind-up roll 10 and the let off roll 11 clamping yew paper 9 of paper advance mechanism 3;
C. utilize computer 24 control wind-up rolls 10 by the rotating speed rotation of setting, drive the continuous motion of yew paper;
D. the pulse laser beam 22 of pulse laser 21 outputs is earlier after after the X-axis scanning galvanometer 17 in the galvanometer scanning system 16,18 reflections of Y-axis scanning galvanometer and 23 focusing of F-θ lens, form a focal spot on yew paper 9 surfaces of continuous motion;
F. under the centralized Control that the rotating speed and the laser pulse of 24 pairs of wind-up rolls 10 of computer are launched, yew paper is got the aperture 15 of described curve or repetitive pattern arranged distribution.
Two. realize the cigarette tipping paper laser boring equipment of rotation polygon prism formula drilling method
The structure of this equipment is as shown in Figure 1: be made up of continuous wave laser 1, optical transform mechanism 2 and the paper advance mechanism 3 that drives 9 continuous motions of yew paper, wherein: optical transform mechanism is by optics semi-transparent semi-reflecting lens 4, total reflective mirror 5, rotary polygon prism 7, and being installed in a plurality of focus heads 8 formations paper advance mechanism top, that be the non-linear arrangement with focusing function, the optical axis of each focus head is all vertical with yew paper surface.The continuous laser beam of continuous wave laser 1 output is divided into the multipath pulse laser bundle through polygon prism 7, be input to respectively again in corresponding with it a plurality of focus heads 8, and focus on the back forms the priority bright dipping on the surface of the yew paper of continuous motion a plurality of focal spots by it, yew paper is got the aperture 15 of single row or multiple rows curve or repetitive pattern arranged distribution.The number of focal spot can be 2n, n 〉=2.Paper advance mechanism 3 is made of wind-up roll 10 and let off roll 11.Yew paper 9 to be processed carries out clamping by wind-up roll in the paper advance mechanism 3 10 and let off roll 11, and yew paper 9 drives continuous motion by wind-up roll 10 rotations.
The a plurality of focus heads 8 that are the non-rectilinear arrangement of this equipment, owing to can be multi-form arrangement shown in Fig. 3,5,6,10, therefore can get the aperture 15 of triangular in shape, zigzag, rhombus, trapezoidal, sinusoidal or cosine-shaped arranged distribution at yew paper.
One side of polygon prism 7 links to each other with the high-speed electric expreess locomotive rotating shaft, and its rotating speed is controlled by PLC; Polygon prism 7 limit numbers are 8～90.
The course of work of this equipment is: referring to Fig. 1, the light of continuous wave laser 1 output is through one group of optics semi-transparent semi-reflecting lens 4 and total reflective mirror 5, and being divided into the M beam energy is the continuous laser beam 6 of elementary beam 1/M, and M is 2 among Fig. 1; A branch of continuous laser beam 6 incides on the polygon prism 7 that rotates at a high speed after total reflective mirror 5 reflections, and the high speed rotation of polygon prism 7 sweeps the incident continuous laser beam in several focus heads 8 of parallel arranged successively, and forming has pulse laser beam successively on the multichannel sequential.This multipath pulse laser bundle is input to respectively in corresponding with it a plurality of focus heads 8, and is punched by its surface that focuses on yew paper 9.Adopt the mode of rotary polygon prism beam split, can obtain the laser pulse of high repetition frequency, guarantee necessary punching production efficiency.A plurality of focus heads 8 are arranged according to certain rules in the space, cooperate the continuous motion of yew paper 9, the hole that can get curve or graphical distribution form on yew paper.
Four. realize the cigarette tipping paper laser boring equipment of mirror-vibrating drilling method
The structure of this equipment is as shown in figure 13: be provided with galvanometer scanning system 16, pulse laser 21, F-θ lens 23, computer 24, paper advance mechanism 3, wherein: paper advance mechanism 3 is made of wind-up roll 10 and let off roll 11, the yew paper 9 that their clampings are to be processed, yew paper 9 drives continuous motion by wind-up roll 10 rotations.Input curve or graphical distribution in computer 24 in advance, deflection angle by X-axis scanning galvanometer 17, Y-axis scanning galvanometer 18 in the different galvanometer scanning systems 16 constantly of computer 24 controls, can realize that focal spot scans in the yew paper according to predefined curve in the computer 24 or graphical distribution form on sequential, cooperate the continuous motion of yew paper, the hole that can on yew paper, get curve or graphical distribution form.By in computer 24, importing different curve or graphical distribution in advance, just can be from of the scanning of sequential control galvanometer scanning system 16 according to different curves or graphical distribution form realization yew paper inner focusing luminous point, the continuous motion of cooperation yew paper obtains the hole of different curves or graphical distribution form on yew paper.The online rate travel of yew paper is detected by the photoelectric encoder 25 that is installed on the wind-up roll 10, and controls by computer 24.Online disconnected paper in the yew paper motion process detects to be monitored by side's mounted thereto disconnected paper detecting apparatus 26, and controls by computer 24.
Mirror-vibrating beam flying technology is the technology that with fastest developing speed, the most ripe realization laser beam moves.The speed that is characterized in is fast, precision is high, can realize various figures, the beam flying of literal and numeral is moved, and particularly can design the beam flying figure easily and carry out the adjustment of parameters by computer.
The galvanometer technology realizes the principle of beam flying, and as shown in figure 12: galvanometer scanning system 16 is made up of X-axis scanning galvanometer 17, Y-axis scanning galvanometer 18 and X-axis galvanometer 19, Y-axis galvanometer 20.The pulse laser 22 of laser instrument output shines on the X-axis scanning galvanometer 17, and X-axis galvanometer 19 is according to the deflection angle φ 1 of the size of current control X-axis scanning galvanometer 17 that is provided.Under the static situation of Y-axis scanning galvanometer 18, can in image field, scan the displacement vector parallel with X-axis, its size is proportional with tangent of deflection angle φ 1.Equally, under the static situation of X-axis scanning galvanometer, Y-axis galvanometer 20 is by the deflection angle φ 2 of control Y-axis scanning galvanometer 18, can scan the displacement vector of a certain size parallel with Y-axis in image field.Correctly control the deflection angle of X-axis scanning galvanometer 17, Y-axis scanning galvanometer 18 by computer, can realize the scanning of any direction in the image field, big small vector, thereby realize the beam flying purpose.
Owing to there is the focus error of imaging beam on the flat field, must adopt F-θ lens 23 to focus on for this reason, like this can be so that the scanning angle of galvanometer produces direct proportionate relationship with the distance that arrives image field, the focusing error is proofreaied and correct simultaneously, and laser beam can be focused on the same focal plane at yew paper place.
Photoelectric encoder 25 is a kind of sensors that the geometry of machinery displacement on the output shaft converted to pulse or digital quantity by opto-electronic conversion.It mainly is made up of grating dish 27 and photoelectric detection system 28.Grating dish 27 is to open several rectangle slits 29 on the plectane of certain diameter five equilibrium.Because the rotating shaft 30 of grating dish is coaxial with the motor of wind-up roll 10, during the motor rotation, grating dish 27 rotates with speed with motor, the photoelectric detection system of forming via light-emitting component 31, receiving element 32, signal processing circuit 33, signal output apparatus 34 28 detects the some pulse signals of output, and its principle as shown in figure 14.The motor speed that just can reflect current wind-up roll 10 by the number of calculating per second photoelectric encoder output pulse.
Adopt this scheme, because the deflection angle of emission, X-axis scanning galvanometer 17 and the Y-axis scanning galvanometer 18 of laser pulse and the on-line velocity of yew paper detect by computer control, just can get the aperture 15 of needed curve or graphical distribution on yew paper by the coordinated movement of various economic factors of above-mentioned three actions.Aperture 15 can be triangular in shape, zigzag, rhombus, trapezoidal, sinusoidal or cosine-shaped arranged distribution.
The cigarette tipping paper laser boring equipment of realization mirror-vibrating drilling method provided by the invention, its course of work is: referring to Figure 13, the pulse laser 22 of pulse laser 21 outputs is earlier after after the X-axis scanning galvanometer 17 in the galvanometer scanning system 16,18 reflections of Y-axis scanning galvanometer and 23 focusing of F-θ lens, form a focal spot on yew paper 9 surfaces of continuous motion; Computer 24 is according to the curve or the different deflection angles of X-axis scanning galvanometer 17, Y-axis scanning galvanometer 18 constantly of graphical distribution control of input in advance, realize on sequential that then yew paper 9 surperficial focal spots by curve of setting or the scanning of graphical distribution form, make yew paper surface get the aperture 15 of predefined curve or pattern arrangement distribution.
Below in conjunction with accompanying drawing above-mentioned concrete enforcement is described further:
Propose the notion of curve or figure punching, finally attainable technical scheme must be arranged.Get the micropore of curve or graphical distribution, two kinds of schemes can be arranged.
First kind of scheme is: in the time of the motion of yew paper high-speed straight-line, realize the punching of curve pattern with the teeter of laser focus point, as shown in Figure 2.The pulse laser beam 22 of incident is after galvanometer 12 reflections, focus on 1 P on yew paper 9 papers by focus lamp 13: the teeter of galvanometer 12 causes beam incident angle to be swung, thereby the incidence angle of incident beam is swung, the final teeter that forms laser focus point P on the yew paper realizes the curve punching in the lengthwise movement of yew paper high speed.The advantage of this scheme is that technology is simple, but shortcoming is the restriction that punching speed is subjected to galvanometer teeter speed.For example adopt fastest optics galvanometer at present, to realize 100 teeters each second, if with 10 mm lengths is the curve cycle, then the fastest vertical chart drive speed can only be 60 meters/minute, and this paper feed with 600 meters/minute of present yew paper puncheres is compared really and differed greatly.Therefore can only under very low punching production efficiency, realize the curve punching.
In order to realize yew paper curve laser boring at a high speed, can adopt another kind of mode: constitute a figure with a plurality of focal spots and repeat simple curve or figure punching.
Fig. 3 has represented the example of a zigzag punching of 8 focal spots realizations of a usefulness.8 focus heads divide two horizontal rows to being arranged in parallel, and the spacing of adjacent focus head equates among every row.Wherein during any one focus head 8 bright dipping,, be vaporized into aperture 15 because the high power density at laser focal spot place makes yew paper part reach vapourizing temperature.The order of 8 focus head bright dipping punchings is 8-1 → 8-2 → 8-3 → 8-4 → 8-5 → 8-6 → 8-7 → 8-8 → 8-1 ... the short distance Δ of having passed by in the vertical when yew paper is than focus head 8-1 bright dipping when focus head 8-2 bright dipping, the equal short distance Δ of having passed by again in the vertical when yew paper is than focus head 8-2 bright dipping when focus head 8-3 bright dipping, final result is: though 8 focus heads divide two horizontal rows to being arranged in parallel, but, 8 focus heads equate because being the spacings of adjacent focus head among order bright dipping and the every row, in conjunction with the continuous motion in the vertical of yew paper, the result has got the aperture 15 of notched profile on yew paper, as shown in Figure 4.
The different distributions result of focus point can obtain different curve distribution forms.For example will obtain the distribution of sinusoidal pattern, Fig. 6 has represented the example of a sinusoidal punching of 8 focal spots realizations of a usefulness.Divide three horizontal rows (as shown in Figure 5) on the basis that is arranged in parallel at 8 focus heads, trickle adjustment by frame for movement, make focus head 8-2,8-4 and 8-6,8-8 respectively with focus head 8-1,85 and 8-7 have small range difference Δ 1 (promptly to widen focus head 8-2 and 84 in the vertical in the vertical, 86 with the distance of 8-8), and the horizontal spacing of adjacent two focus heads is equal, as shown in Figure 6.
The order of punching is 8-1 → 8-2 → 8-3 → 8-4 → 8-5 → 8-6 → 8-7 → 8-8 → 8-1 ..., the bright dipping of 8 focus head orders.Focus head 8-2 is ahead of 81 1 short distance Δs 1 of focus head in the vertical.The Rankine-Hugoniot relations of laser focusing head in Fig. 3 like this, the short distance Δ-Δ 1 of having passed by in the vertical when yew paper is than focus head 8-1 bright dipping when focus head 8-2 bright dipping; Again because focus head 8-3 and focus head 8-1 overlap in the vertical, short distance Δ+the Δ 1 of having passed by again in the vertical when yew paper is than focus head 82 bright dippings when focus head 8-3 bright dipping, final result is: because 8 focus heads are order bright dippings, continuous motion result in conjunction with yew paper has got the aperture 15 that sinusoidal pattern distributes on yew paper, as shown in Figure 7.
Realize that the bright dipping of a plurality of focal spots order can directly adopt the polygon prism mode, as shown in Figure 8.The principle of polygon prism beam split is: certain surface that is radiated at rotation polygon prism 7 after the continuous laser beam 6 line focus mirrors 13 of incident focus on.This face of polygon prism 7 is in the process of rotation, and its reflection lasering beam is incited somebody to action an inswept N focus lamp 13 successively after parabolic mirror 14 reflections, and each focus lamp 13 receives a part of laser when laser is inswept.When inswept successively N the focus lamp of laser, be equivalent to distribute a laser pulse successively like this to each focus lamp.When polygon prism 7 rotates at a high speed, each face of polygon prism distributes a pulse all for all focus lamps, so in fact, rotating polygon prism is equivalent to a continuous laser is partitioned into N road pulse laser, each road laser is identical, but each road laser has the dislocation of a priority relatively in time.N road pulse laser focuses on the yew paper by focus lamp respectively and punches.Utilize this N road sequentially the reasonable distribution on the locus of the laser pulse of bright dipping cooperate the continuous motion of yew paper 9 just can realize that curve or figure punch.
For example adopt polygon prism that continuous laser beam is divided into 16 road pulse lasers, with wherein the 1st, 3,5,7,9,11,13, the 15 road and the 2nd, 4,6,8,10,12,14, the 16 tunnel form two group pulse laser respectively, focus on by focus lamp 13 and just can directly realize two row's curves or figure punching on the yew paper.
As for the mode that focuses on can be to utilize N focus lamp 13 to focus on the different parts of paper respectively, also can utilize a focus lamp 13 to focus on several roads laser, different incidence angles is arranged during every road laser incident relatively, thereby realize laterally having a plurality of focal spots of certain distance.As shown in Figure 9.
At last, consider the restriction on the frame for movement, can adopt the method for some integral multiple curve cycle override interrupts at interval, each focus head is interval some integral multiples curve Cycle Length on vertically distributing, can get one to ten curve Cycle Length, one of them curve Cycle Length L is 2～24mm, integrates still suitable curve distribution.Figure 10 has represented that 8 focus heads of usefulness curve Cycle Length L in interval on vertically distributing realizes the example of a zigzag punching.
Divide three horizontal rows on the basis that is arranged in parallel at 8 focus heads shown in Figure 5,8 focus heads are separated in the vertical, make each focus head curve Cycle Length L in interval on vertically distributing, and keep the horizontal spacing of adjacent focus head constant.
The order of punching is 8-1 → 8-2 → 8-3 → 8-4 → 8-5 → 8-6 → 8-7 → 8-8 → 8-1 ..., the bright dipping of 8 focus head orders.The short distance Δ of having passed by in the vertical when yew paper is than focus head 8-1 bright dipping when focus head 8-2 bright dipping, then between the 2nd aperture and the 1st aperture vertically at a distance of Δ+L; The equal short distance Δ of having passed by again in the vertical when yew paper is than focus head 8-2 bright dipping when focus head 8-3 bright dipping, then between the 3rd aperture and the 2nd aperture vertically at a distance of Δ+L; The equal short distance Δ of having passed by again in the vertical when yew paper is than focus head 8-7 bright dipping when focus head 8-8 bright dipping, then between the 8th aperture and the 7th aperture vertically at a distance of Δ+L.From the 9th period cycle of yew paper, all yew paper thereafter all will be through the punching of 8 all focus heads in its Cycle Length L.From the 9th period cycle of yew paper, on every section yew paper Cycle Length L, present the aperture 15 that sawtooth pattern distributes, as shown in figure 11 so.
The difference of the focus head result that arranges can obtain different curves or graphical distribution form.
Described focus head can adopt transmission mode to focus on or adopt the parabolic reflector mode to focus on.
Claims (10)
1. cigarette tipping paper laser boring method is characterized in that adopting following rotation polygon prism formula drilling method:
Continuous laser beam with continuous wave laser (1) output, after one group of optics semi-transparent semi-reflecting lens (4) and total reflective mirror (5) beam split, form the pulse laser beam that priority is arranged on the multichannel sequential by rotary polygon prism (7) scanning beam split, after focusing on by a plurality of focus heads (8) respectively again, form a plurality of focal spots of bright dipping successively on the surface of the yew paper (9) of continuous motion, these focal spots make yew paper get the aperture of single row or multiple rows curve or repetitive pattern arranged distribution (15).
2. according to the described laser boring method of claim 1, it is characterized in that yew paper (9) being punched by following step:
A. by the wind-up roll (10) and let off roll (11) the clamping yew paper (9) of paper advance mechanism (3);
B. regulate the locus of a plurality of focus heads (8), make its top be the non-linear arrangement, should guarantee in the adjustment process that the optical axis of each focus head is all vertical with yew paper surface along the yew paper direction of motion with perpendicular to the yew paper direction of motion at yew paper (9);
C. start PLC, the wind-up roll (10) in the paper advance mechanism (3) is rotated by the rotating speed of setting, drive the continuous motion of yew paper;
D. the continuous laser beam of continuous wave laser (1) output shines certain working face of the polygon prism (7) of rotation at a high speed after one group of optics semi-transparent semi-reflecting lens (4) and total reflective mirror (5) beam split;
E. this working surface of polygon prism (7) in rotary course with the inswept successively a plurality of focus heads of continuous laser beam, each focus head all receives a part of laser when laser is inswept, will have pulse laser successively to export on the continuous laser beam demultiplexing sequential that enter during polygon prism (7) multiple scanning;
F. by the multipath pulse laser of polygon prism (7) output respectively after a plurality of focus heads (8) focus on, a plurality of focal spots in the bright dipping of the surperficial formation order of yew paper (9), under the centralized Control of PLC to the rotating speed of the wind-up roll (10) in the paper advance mechanism (3), polygon prism rotating speed, a plurality of focal spots of bright dipping punch to yew paper in order, make and form the aperture (15) with described curve or graphical distribution arrangement on the yew paper.
3. cigarette tipping paper laser boring equipment of realizing claim 1 or 2 described laser boring methods, it is characterized in that described equipment is made up of continuous wave laser (1), optical transform mechanism (2) and the paper advance mechanism (3) that drives yew paper (9) continuous motion, wherein: optical transform mechanism is by optics semi-transparent semi-reflecting lens (4), total reflective mirror (5), rotary polygon prism (7), and being installed in a plurality of focus heads (8) formations paper advance mechanism top, that be the non-linear arrangement with focusing function, the optical axis of each focus head is all vertical with yew paper surface; Scanning enters in corresponding with it a plurality of focus heads the continuous laser beam of described laser instrument output through polygon prism, and focus on the back forms the priority bright dipping on the surface of the yew paper of continuous motion a plurality of focal spots by it, yew paper is got the aperture (15) of single row or multiple rows curve or repetitive pattern arranged distribution.
4. cigarette tipping paper laser boring equipment according to claim 3 is characterized in that: aperture (15) is triangular in shape, zigzag, rhombus, trapezoidal, sinusoidal or cosine-shaped arranged distribution.
5. cigarette tipping paper laser boring equipment according to claim 3 is characterized in that: a side of polygon prism (7) links to each other with the high-speed electric expreess locomotive rotating shaft, and its rotating speed is controlled by PLC; Polygon prism (7) limit number is 8～90.
6. cigarette tipping paper laser boring method is characterized in that adopting following mirror-vibrating drilling method:
With the pulse laser beam (22) of pulse laser (21) output earlier after after galvanometer scanning system (16) scanning and F-θ lens (23) focus on, in the scanning of yew paper (9) the surface formation focal spot of continuous motion; The deflection angle that computer (24) is controlled X-axis scanning galvanometer (17), Y-axis scanning galvanometer (18) in the different galvanometer scanning systems (16) constantly according to the curve or the graphical distribution of input in advance, then on sequential, realize the curve or the scanning of graphical distribution form of the surperficial focal spot of yew paper (9), and yew paper is got the aperture (15) of single row or multiple rows curve or repetitive pattern arranged distribution.
7. according to the described laser boring method of claim 6, it is characterized in that yew paper being punched by following step:
A. input curve or graphical distribution in advance in computer (24);
B. by the wind-up roll (10) and let off roll (11) the clamping yew paper (9) of paper advance mechanism (3);
C. utilize computer (24) control wind-up roll (10) by the rotating speed rotation of setting, drive the continuous motion of yew paper;
D. the pulse laser beam (22) of pulse laser (21) output is earlier after after the X-axis scanning galvanometer (17) in the galvanometer scanning system (16), Y-axis scanning galvanometer (18) reflection and F-θ lens (23) focusing, form a focal spot on yew paper (9) surface of continuous motion;
E. computer (24) on sequential realizes then that according to the curve or the different deflection angles of X-axis scanning galvanometer (17), Y-axis scanning galvanometer (18) constantly of graphical distribution control of input in advance the surperficial focal spot of yew paper (9) is by curve of setting or the scanning of graphical distribution form;
F. under the centralized Control that computer (24) is launched the rotating speed and the laser pulse of wind-up roll (10), yew paper is got the aperture (15) of described curve or repetitive pattern arranged distribution.
8. cigarette tipping paper laser boring equipment of realizing claim 6 or 7 described laser boring methods, it is characterized in that described equipment is provided with galvanometer scanning system (16), pulse laser (21), F-θ lens (23), computer (24), paper advance mechanism (3), wherein: paper advance mechanism (3) constitutes the yew paper (9) that their clampings are to be processed by wind-up roll (10) and let off roll (11); The pulse laser (22) of pulse laser (21) output, after focusing on the back, the X-axis scanning galvanometer (17) in the galvanometer scanning system (16), Y-axis scanning galvanometer (18) reflection and F-θ lens (23) upward form a focal spot earlier at yew paper (9), this focal spot scans on yew paper (9) surface of continuous motion according to predefined curve or graphical distribution form in the computer (24) on sequential, makes yew paper get the aperture of described curve or repetitive pattern arranged distribution (15).
9. cigarette tipping paper laser boring equipment according to claim 8, it is characterized in that described equipment is provided with the online testing agency of paper feed, it is made up of photoelectric encoder (25) and disconnected paper detecting apparatus (26), wherein: photoelectric encoder (25) is contained on the wind-up roll (10), and disconnected paper detecting apparatus (26) is positioned at the top of yew paper (9).
10. cigarette tipping paper laser boring equipment according to claim 8 is characterized in that: aperture (15) is triangular in shape, zigzag, rhombus, trapezoidal, sinusoidal or cosine-shaped arranged distribution.
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