CN102179621A - Roller surface roughing laser processing system and method for irregular image roughing micro pit - Google Patents
Roller surface roughing laser processing system and method for irregular image roughing micro pit Download PDFInfo
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- CN102179621A CN102179621A CN2011100811648A CN201110081164A CN102179621A CN 102179621 A CN102179621 A CN 102179621A CN 2011100811648 A CN2011100811648 A CN 2011100811648A CN 201110081164 A CN201110081164 A CN 201110081164A CN 102179621 A CN102179621 A CN 102179621A
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Abstract
The invention discloses a roller surface roughing laser processing system and a method for an irregular image roughing micro pit. The roller surface roughing laser processing system comprises machine tool equipment for driving a roller workpiece to rotate, a laser processing device moving axially along the roller workpiece and an irregular image switch device. Laser output signals of the laser processing device are output in an irregular image mode by the irregular image switch device. The method is characterized in that: a switch is controlled according to information 1 and 0 of an irregular black-and-white image, and the laser output signals of the surface of the roller workpiece are in rectangular distribution. The system and method have the advantages that the roller surface laser roughing of a two-dimensional high repetitive irregular roughing micro pit is realized; and the distribution of the irregular roughing micro pits can be simulated and displayed through an image file. The defect of one-dimensional circumferential high repetitive laser roughing in a roller surface roughing laser processing system and a method for a circumferential irregular roughing micro pit is overcome and the defect of low repetitive laser roughing in the roller surface roughing laser processing system and the method for the irregular deflected roughing micro pit is overcome.
Description
Technical field
The present invention relates to a kind of laser process equipment and processing method that is used for the surface of roller texturing, particularly a kind of laser process equipment and processing method with the surface of roller texturing that can process the little hole of random texturing.
Background technology
YAG laser roughening equipment is the cold roll laser process equipment of Inst. of Mechanics, CAS in the nineties research and development, as: China Patent No.: ZL 92113223.9, title: " high frequency modulation multy-pulse YAG laser engraving design system and processing method "; China Patent No.: ZL 94220848.X, title: " laser process equipment that is used for the roller surface texturing ".Fig. 1 is the general structure schematic diagram of this equipment.This equipment adopts the high power laser impulse action of high repetition frequency in roller surface, produces the little hole of reinforcement (texturing point) of countless certain patterns on roll surface.This equipment class is similar to engine lathe.Its course of work is that spindle motor of machine tool drives the roll rotation, drives the laser head translation on the movable stand simultaneously, and acousto-optic power supply control laser instrument sends the laser pulse of fixed frequency, thereby gets the helix that is made of the little hole of texturing of a uniform pitch on roll.Fig. 4 be the little hole of the texturing shape appearance figure that utilizes the cold roll surface that this method beats (about representative axially, represent circumferential up and down, down together), be referred to as the little hole of uncontrollable distribution texturing shape appearance figure, claim that correspondingly Fig. 1 is uncontrollable distribution laser roughening outfit of equipment structural representation, its little hole is the controlled waveform of one dimension and distributes.
For increase that little hole distributes each to the uniformity, each of regulating cold-reduced sheet is to percentage elongation, Chinese Academy of Sciences's mechanics has been developed the two-dimentional controlled distribution technology of YAG laser roughening.As: China Patent No.: ZL00128273.5, title: " surface of roller texturing laser-processing system " with controlled distribution texturing point.Fig. 2 is the general structure schematic diagram of this equipment.Fig. 5, Fig. 6 are the little hole of the texturing shape appearance figures that utilizes the cold roll surface that this method beats, this equipment is by adorning the incremental encoder of a high-accuracy high-resolution in the main shaft coaxial direction, and realizes the controlled distribution in the little hole of roll surface texturing with an industrial computer guide sound photoelectric source and movable stand.Though two dimension controlled distribution technology can realize distributing than the more uniform little hole of one dimension controlled distribution technology,, its distribution is also more regular.
More than the little hole of the texturing of two kinds of texturing plates distribute certain rule all arranged, make the outward appearance of texturing plate all directions inconsistent, directionality is arranged.Because the regular distribution in little hole, the laser roughening plate has following shortcoming: striped appears in (1) laser roughening plate easily.The vision difference that little hole of rule distributes and causes each to distribute to little hole; (2) interference of light striped appears in laser roughening plate easily.The interference of light between two periodic regular patterns is easy to generate " Moire fringe " phenomenon.
The random distribution in the little hole of considerable texturing plate requirement is arranged in the engineering.In order to improve the presentation quality of laser roughening plate, the controlled random distribution technique of exploitation on the basis of Chinese Academy of Sciences's mechanics place two dimension controlled distribution technology.As: China Patent No.: ZL 200510117158.8, title: " the surface of roller texturing laser-processing system and the method for the random texturing point of circumference ".This laser-processing system comprises the machine tool that drives the rotation of roller class workpiece, along axially movable laser processing device of roller class workpiece and pseudorandom time-delay mechanism.Its method is that the pseudorandom time-delay mechanism makes at every turn to roller class surface of the work emitted laser output signal and produces at random time-delay in the official hour scope.Fig. 9 is the little hole of the random time-delay texturing of a rectangle distribution schematic diagram, and Figure 10 is the little hole of the random time-delay texturing of a rhombus distribution schematic diagram.Its advantage is that response speed is fast, texturing frequency height (can reach several ten thousand times).Its shortcoming is to realize the random distribution of circumferential one dimension.
And for example: China Patent No.: ZL 200510116750.6, title: " the surface of roller texturing laser-processing system and the method for random deflection texturing point ".This laser-processing system comprises the machine tool that drives the rotation of roller class workpiece, along axially movable laser processing device of roller class workpiece and pseudorandom arrangement for deflecting.Its method is that the pseudorandom arrangement for deflecting makes at every turn to the generation deflection at random in the spatial dimension of regulation of roller class surface of the work emitted laser output signal.Figure 10 is the little hole of the random deflection texturing of a rectangle distribution schematic diagram, and Figure 11 is the little hole of the random deflection texturing of a rhombus distribution schematic diagram.Its advantage is to realize circumferential and axial two-dimentional random distribution.Its shortcoming response speed is slow, texturing frequency low (the highest several thousand times).
Summary of the invention
For solving the problem that prior art exists, the invention provides the surface of roller texturing laser-processing system and the method in the little hole of a kind of random image texturing, it had both overcome the surface of roller texturing laser-processing system in the little hole of the random texturing of circumference and the shortcoming that method can only realize the high Repetition Frequency Laser texturing of circumferential one dimension, having overcome the surface of roller texturing laser-processing system in the little hole of random deflection texturing and the shortcoming that method can only realize low Repetition Frequency Laser texturing again, is laser process equipment and the method that a kind of better having can be processed the surface of roller texturing in the little hole of two-dimentional random texturing.
The surface of roller texturing laser-processing system in the little hole of random image texturing of the present invention, it comprises the machine tool that drives the rotation of roller class workpiece, along the axially movable laser processing device of roller class workpiece, it is characterized in that: the random presentation switch device that also includes the described laser processing device laser output signal of control; Described random presentation switch device receives the image file of random spot distribution and handles, change control signal corresponding into, drive described laser processing device pair roller class surface of the work again and process, thereby in the texturing little hole of roller class surface of the work formation with the random distribution of the corresponding two dimension of image of random spot distribution.
Further, described random presentation switch device comprises single board computer and the presentation switch interface with PC function, and described presentation switch interface further comprises input interface, presentation switch and the output interface that connects successively; Wherein, described single board computer is connected with described presentation switch by the PC/104 bus, described single board computer is handled the image file of the random spot distribution of input, position a bit forms control signal 1, do not have position a little to form control signal 0, and the control signal that forms is transferred to described presentation switch; Described input interface is used for the level conversion of input signal, opens or closes according to the described presentation switch of 1,0 control signal, and described output interface is according to the described laser processing device of the state-driven of described presentation switch.
Further, the surface of roller texturing laser-processing system in the little hole of random image texturing of the present invention can also have following characteristics: described laser processing device comprises Laser Power Devices, laser instrument, industrial computer, controlled distribution interface card, acousto-optic power supply, acousto-optic cell, the input signal interface of described random presentation switch device with or control distribution interface card connect, the signal input part that the output signal interface of random presentation switch device is connected with the acousto-optic power supply connects, and RS232C interface and industrial computer join.
The output and the input signal of described random presentation switch device are pulse signal, and output signal is triggered by the rising edge of input signal, exports behind presentation switch.
The surface of roller texturing laser processing in the little hole of random image texturing of the present invention, it is to make the axis rotation of roller class workpiece along self, make the axial uniform motion of laser beam along roller class workpiece, receive the image file of random spot distribution and handle by random presentation switch device, change control signal corresponding into, drive described laser processing device pair roller class surface of the work again and process, thereby in the texturing little hole of roller class surface of the work formation with the random distribution of the corresponding two dimension of image of random spot distribution.
The present invention is at existing surface of roller texturing laser process equipment---and increase random presentation switch device in the controlled distribution laser roughening equipment, make the little hole of texturing be two-dimentional random distribution.
The present invention compares with processing method with prior art equipment and has the following advantages:
1, realizes the surface of roller laser roughening of the random texturing Wei Keng of two-dimentional high repetition;
2, the distribution of random texturing Wei Keng can show by the image file simulation.
Description of drawings
Fig. 1 is uncontrollable distribution YAG laser roughening outfit of equipment structural representation;
Fig. 2 is a controlled distribution YAG laser roughening outfit of equipment structural representation;
Fig. 3 is that the described incremental encoder of the embodiment of the invention connects schematic diagram with main shaft;
The little hole of the uncontrollable distribution texturing of Fig. 4 shape appearance figure;
Fig. 5 is the little hole of a distributed rectangular texturing shape appearance figure;
Fig. 6 is the little hole of a rhombus distribution texturing shape appearance figure;
Fig. 7 is random presentation switch apparatus structure schematic diagram;
Fig. 8 is random presentation switch device program flow diagram;
Fig. 9 is the rhombus little hole of the random time-delay texturing schematic diagram that distributes;
Figure 10 is the rhombus little hole of the random deflection texturing schematic diagram that distributes;
Figure 11 is the little hole of the described random image texturing of an embodiment of the invention schematic diagram;
Figure 12 is the described random image file generating algorithm schematic diagram of the embodiment of the invention;
Figure 13 is a laser roughening apparatus control system block diagram of the present invention;
Figure 14 is a lathe movable stand upper strata light path schematic diagram.
Drawing label declaration: 1-roller to be processed; 2-light path protective cover; The 3-gas circuit; The 4-laser instrument; The 5-lathe head of a bed; The 6-monitor; 7, the 20-machine tool guideway; 8-lathe movable stand; The 9-laser head; The 10-feed rod; 11-lathe tailstock; 12-two dimension movable stand; 13-acousto-optic power supply; The 14-dead head; 15-servo longitudinal motor; The 16-ball-screw; The 17-Laser Power Devices; The 18-switch board; The 19-industrial computer; The 21-incremental encoder; 22-flexure strip shaft coupling; 23-incremental encoder installation sleeve; 24-machine tool chief axis gearbox; 25-machine tool chief axis cover; The 26-machine tool chief axis; The horizontal mobile governor motion of 27-; The 28-condenser lens; The 29-beam expanding lens; The 30-speculum; The 31-light path switching device; 32-B road laser instrument; 33-B road acousto-optic cell; 34-A road laser instrument; 35-A road acousto-optic cell; 36,37-light path protective jacket.
The specific embodiment
The present invention will be described in detail below in conjunction with accompanying drawing:
In order to realize the random distribution of laser roughening, the scheme that present embodiment proposes such as Fig. 2, Fig. 3, Fig. 7, Figure 12, shown in Figure 13.The texturing process in the little hole of the random texturing of surface of roller adopts random presentation switch device to realize.Also promptly in controlled distribution laser roughening equipment, increase random presentation switch device, make the little hole of texturing be two-dimentional random distribution.
The general structure schematic diagram of present embodiment is with shown in Figure 2 identical, and equipment is by the lathe head of a bed, and bed piece and switch board three parts are formed, and have and the stepless adjustable similar version of bidimensional numerically controlled lathe of machine spindle speed.The lathe head of a bed 5 comprises that frequency converter (model is VFD-220B43A), machine tool chief axis drive the incremental encoder 21 of variable-frequency motor (model is YP-50-22-4B3), machine tool chief axis gearbox 24 (speed reducing ratio is 3.75), machine tool chief axis 26 and machine tool chief axis cover 25, high-accuracy high-resolution (model is ALFA-2500BM-G10L, and revolution etc. divide 100,000 lines) and incremental encoder installation sleeve 23, chuck and lubricious system etc.Frequency converter is installed in the bottom of the lathe head of a bed 5, and it is electrically connected with the main shaft drives variable-frequency motor; The main shaft variable-frequency motor links to each other with machine tool chief axis through the machine tool chief axis gearbox; Machine tool chief axis one side is chuck fixedly, and chuck is used to the roller that is installed; Opposite side fixed main shaft cover 25, collar bush 25 (tape spool head) is threaded with machine tool chief axis 26 usefulness, and collar bush 25 is through 21 of flexure strip shaft coupling 22 and incremental encoders link to each other (guaranteeing that incremental encoder is contained in machine tool chief axis 26 coaxial direction); Incremental encoder 21 end face fixed increment encoder installation sleeves 23 also link to each other with machine tool chief axis gearbox 24 through installation sleeve.Lubricating system comprises lubricating pump, fuel tank and oil pipe etc., and lubricating system is used for lubricated machine tool chief axis gearbox.D/A interface card in the industrial computer 19 signals to frequency converter, and frequency converter drives spindle motor of machine tool and rotates together with roller, and rotating speed is stepless adjustable.The pulse signal of incremental encoder output reflection roller position of rotation when spindle motor rotates together with roller, pulse signal is passed to the controlled distribution interface card in the industrial computer 19, and machine is handled back random presentation switch device of control and servo longitudinal driver as calculated.Random presentation switch device guide sound photoelectric source 13.Servo longitudinal driver drives servo longitudinal motor 15 drives lathe movable stand 12 move left and right on machine tool guideway 20 through ball-screw 16.
Lathe bed comprises machine tool guideway 20, lathe two dimension movable stand 12, servo longitudinal motor 15, ball-screw 16 and dead head 14 etc.Described servomotor 15 (using model to be MDMA152A1A) and ball-screw 16 direct connections, servomotor 15 drive ball-screws 16 and drive movable stand 12 by screw and be slidingly matched with guide rail, and on guide rail 20 move left and right, and speed is stepless adjustable.Movable stand is two parts about in the of 12 minutes, the latter half is equipped with one the road or two-way acousto-optic power supply 13 and Laser Power Devices 17, and the first half is equipped with A road laser instrument and A road acousto-optic cell, B road laser instrument and B road acousto-optic cell, light path switching device, laser beam expanding lens, beam reflection mirror, horizontal mobile governor motion, laser head and light path protective jacket.
Figure 14 is a lathe movable stand upper strata light path schematic diagram.Light path switching device is made of the total reflective mirror on low speed synchromotor, leading screw, guide rail, slide and the slide, and low speed synchromotor and leading screw are direct-connected, and leading screw, guide rail and slide constitute a transmission.The effect of light path switching device is the turnover light path, and the laser beam that B road laser instrument is sent enters laser beam expanding lens.Laser beam expanding lens comprises divergent mirror and focus lamp, is made up of the multi-disc mirror, has the effect of laser beam beam-expanding collimation.Completely reflecting mirror be used to the to transfer transmission direction of light beam.Horizontal mobile governor motion is made up of horizontal servomotor (model is MSMA042A1A), ball-screw, guide rail and slide, ball-screw, guide rail and slide constitute a transmission, it be contained in displacement transducer on the slide, laterally servo-driver and position PID adjuster constitute the spacing autotracking unit, tracking spacing can be set by the D/A interface card in the industrial computer.Condenser lens comprises laser condensing lens, protective glass, assist gas injection apparatus, and protective glass is installed in before the focus lamp, and its effect is the passage that cuts off laser condensing lens and the application point of laser on roll surface, makes laser condensing lens avoid polluting.The assist gas injection apparatus is an a kind of pair of gas circuit structure.In the laser roughening process, the metal of roller surface produces under the effect of laser and dissolves and partial gasification, in order to make roll and rolled metal plate reach certain roughness, must make roller surface not only form pit and around pit, also should have the existence of boss, this boss be exactly by the metal that dissolves flow out pit solidify form.For this reason, one of gas circuit of assist gas injection apparatus be designed to optical axis in an angle, excursion is 30 °～75 °, and the motlten metal at laser action point place is blowed to a side.Another gas circuit of assist gas injection apparatus is with to assemble laser beam coaxial, and air-flow is introduced and is in before the protective glass, and it is not contaminated with protective glass that the air-flow that penetrates from this gas circuit nozzle is used to intercept the dust and the splash of laser and metal function.Laser condensing lens is one group of compound lens, except laser beam being focused on the effect of surface of the work, can also eliminate optical aberration, reduces the dispersivity of laser beam.A road acousto-optic cell is housed in the laser instrument of A road, B road acousto-optic cell is housed in the laser instrument of B road.It is dustproof that the light path protective jacket is used for light path, and it has two kinds of structures.Light path protective jacket 36 is made up of the metal sleeve of the regular length more than two sections or two sections, and its effect is to be used for the beam reflection mirror to be connected with light path between the condenser lens, is characterized in that the length of protective jacket can moving forward and backward and change with horizontal mobile governor motion.Light path protective jacket 37 is fine-tuning undulatory metal cylinder or plastic barrels, and its effect is that the light path that is used between A road laser instrument, B road laser instrument, light path switching device, laser beam expanding lens and the speculum connects; Laser Power Devices are used for to the laser instrument power supply and can guarantee that supply current is constant, and the acousto-optic power supply is by sending the light pulse that ultrasonic signal control laser instrument sends to acousto-optic cell.
Random presentation switch device schematic diagram as shown in Figure 7.This device includes single board computer and PC/104 presentation switch interface card.Single board computer (adopting the PC/104 module) provides the repertoire of complete PC.PC/104 presentation switch interface card is made up of input interface, presentation switch and output interface.Single board computer is handled the image file of the random spot distribution of input, and the position of having a few forms control signal 1, does not have position a little to form control signal 0, and the control signal that forms is transferred to presentation switch.Input interface is used for the level conversion of input signal, opens or closes according to 1,0 control signal presentation switch.Output interface is according to the state-driven laser processing device of presentation switch.PC/104 presentation switch interface card is installed on the PC/104 expansion bus of single board computer.
The external signal of random presentation switch device has three the tunnel: input, output and RS232C interface.Input signal and output signal all are pulse signals.Output signal is triggered by the rising edge of input signal, exports behind presentation switch.
Fig. 8 is random presentation switch device program flow diagram.Program earlier passes random image file down to internal memory by the RS232C interface from industrial computer, waits for input signal afterwards, and according to the pulse output of 1, the 0 information control output signal of random black white image file respective pixel, so constantly circulation.Respective pixel is 1 o'clock, and output signal has pulse output, and laser instrument gives off laser beam and produces little hole at the roll surface correspondence position, otherwise the output of output signal no pulse does not produce little hole at the roll surface correspondence position.So just can process with the random little hole of the corresponding two dimension of random image and distribute at roll surface.
Random presentation switch device inserts after the signal of existing surface of roller texturing laser process equipment control laser output.Can be with reference to Figure 13.
The production method of the random image file of two dimension is a lot, can be the image file with two-dimentional random spot distribution that generates in advance, and Figure 11 is the little hole of the described random image texturing of an embodiment of the invention schematic diagram; Figure 12 is the described random image file generating algorithm schematic diagram of the embodiment of the invention.Algorithm is: data file is by from left to right, and order from top to bottom generates, and is 0 at one of 4 directions of signal Figure 12 contiguous pixels, and this pixel gets 1, otherwise this pixel gets 1 or 0 by 0.5 probability.
The present invention is the limit laser wavelength not.Random presentation switch device can be used for all kinds of laser instruments that are used for laser roughening with electric pulse control light pulse, as acousto-optic control continuous YAG laser, radio-frequency carbone dioxide laser.
Claims (5)
1. the surface of roller texturing laser-processing system in the little hole of random image texturing, it comprises the machine tool that drives the rotation of roller class workpiece, along the axially movable laser processing device of roller class workpiece, it is characterized in that: the random presentation switch device that also includes the described laser processing device laser output signal of control; Described random presentation switch device receives the image file of random spot distribution and handles, change control signal corresponding into, drive described laser processing device pair roller class surface of the work again and process, thereby in the texturing little hole of roller class surface of the work formation with the random distribution of the corresponding two dimension of image of random spot distribution.
2. the surface of roller texturing laser-processing system in the little hole of random image texturing as claimed in claim 1, it is characterized in that, described random presentation switch device comprises single board computer and the presentation switch interface with PC function, and described presentation switch interface further comprises input interface, presentation switch and the output interface that connects successively; Wherein,
Described single board computer is connected with described presentation switch by the PC/104 bus, described single board computer is handled the image file of the random spot distribution of input, position a bit forms control signal 1, do not have position a little to form control signal 0, and the control signal that forms is transferred to described presentation switch; Described input interface is used for the level conversion of input signal, opens or closes according to the described presentation switch of 1,0 control signal, and described output interface is according to the described laser processing device of the state-driven of described presentation switch.
3. the surface of roller texturing laser-processing system in the little hole of random image texturing as claimed in claim 1 or 2, it is characterized in that: described laser processing device comprises Laser Power Devices, laser instrument, industrial computer, controlled distribution interface card, acousto-optic power supply, acousto-optic cell, the input signal interface and the controlled distribution interface card of described random presentation switch device plug, the output signal interface of random presentation switch device joins with the signal input part that the acousto-optic power supply is connected, and RS232C interface and industrial computer join.
4. the surface of roller texturing laser-processing system in the little hole of random image texturing as claimed in claim 3, it is characterized in that: the output and the input signal of described random presentation switch device are pulse signal, and output signal is triggered by the rising edge of input signal.
5. the surface of roller texturing laser processing in the little hole of random image texturing, it is to make the axis rotation of roller class workpiece along self, make the axial uniform motion of laser beam along roller class workpiece, receive the image file of random spot distribution and handle by random presentation switch device, change control signal corresponding into, drive described laser processing device pair roller class surface of the work again and process, thereby in the texturing little hole of roller class surface of the work formation with the random distribution of the corresponding two dimension of image of random spot distribution.
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Cited By (9)
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| CN102699524A (en) * | 2012-05-25 | 2012-10-03 | 武汉华工激光工程有限责任公司 | Method and device for processing multi-head laser disordered and textured roller surface |
| CN103624407A (en) * | 2013-11-29 | 2014-03-12 | 武汉钢铁(集团)公司 | Method and device for multi-head laser texturing processing of roller surface |
| CN104210212A (en) * | 2013-05-30 | 2014-12-17 | 特诺恩股份公司 | Lamination Cylinder |
| CN104551408A (en) * | 2014-12-23 | 2015-04-29 | 中国科学院力学研究所 | System and method for multi-beam synthesizing and focusing type roll surface texturing laser processing |
| CN105562933A (en) * | 2016-02-22 | 2016-05-11 | 中国科学院力学研究所 | Control system and method for improving circumference irregular texturing micro-pit uniformity |
| CN108857073A (en) * | 2018-06-15 | 2018-11-23 | 常州天寅智造科技股份有限公司 | Carve control method and engraving system |
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| CN110976432A (en) * | 2019-12-04 | 2020-04-10 | 大族激光科技产业集团股份有限公司 | Laser cleaning device and laser cleaning method |
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| CN105562933A (en) * | 2016-02-22 | 2016-05-11 | 中国科学院力学研究所 | Control system and method for improving circumference irregular texturing micro-pit uniformity |
| CN108927407A (en) * | 2017-05-27 | 2018-12-04 | 宝山钢铁股份有限公司 | A kind of metal material and its manufacturing method on low percent ripple surface |
| CN108857073A (en) * | 2018-06-15 | 2018-11-23 | 常州天寅智造科技股份有限公司 | Carve control method and engraving system |
| WO2020107613A1 (en) * | 2018-11-27 | 2020-06-04 | 江苏大学 | Rough laser machining device for roller and machining method thereof |
| GB2581021A (en) * | 2018-11-27 | 2020-08-05 | Univ Jiangsu | Rough laser machining device for roller and machining method thereof |
| GB2581021B (en) * | 2018-11-27 | 2023-08-09 | Univ Jiangsu | A roller laser texturing processing equipment and its processing method |
| CN110976432A (en) * | 2019-12-04 | 2020-04-10 | 大族激光科技产业集团股份有限公司 | Laser cleaning device and laser cleaning method |
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Application publication date: 20110914 |