CN101746152B - Laser version roller film engraving machine - Google Patents

Abstract

The invention relates to the field of plate roller laser processing systems, in particular to a laser plate roller film engraving machine. The printing roller film engraving technology is an advanced plate making mode at present, and has the main processing characteristics that: and (3) acting laser on the protective layer precoated on the surface of the plate roller according to the track of the plate pattern, wherein the part of the protective layer, which falls off and is exposed out of the surface of the plate roller, is the plate pattern to be processed, and then carrying out corrosion treatment on the plate roller to finally form the plate pattern. The laser printing roller film engraving machine is a special machine aiming at the processing mode and comprises: graphic image processing systems, control systems, mechanical systems, lasers, and optical systems. The optical system comprises an acousto-optic deflector, realizes the light splitting time-sharing control of laser, enables the processed printing plate pattern to be finer, and adopts a double-layer optical fiber laser generator to achieve the high stability of laser power and the excellent quality of light beam.

Description

A laser plate roller engraving engraving machine

technical field

The invention relates to the field of laser processing systems for plate rolls, in particular to a laser film engraving and engraving machine for plate rolls. the

Background technique

In recent years, the plate engraving technology has become a relatively advanced plate-making method. The main processing features are: the laser is used to act on the pre-coated protective layer on the surface of the plate according to the track of the plate pattern, and the protective layer falls off to expose the surface of the plate. The printing plate pattern, and then the plate roller is corroded and cleaned to finally form the printing plate pattern. However, most of the current laser engraving machines directly process the printing plate pattern on the cylindrical surface of the plate roller through the laser beam, and there is no special laser engraving equipment for the above-mentioned processing method. the

Chinese patent CN1299723 discloses a system for laser engraving plate rolls, which includes: engraving devices for laser plate rolls, CCD cameras, computer control parts, and circulating water cooling and auxiliary gas devices for lasers. The device uses multiple laser beams to focus and combine beams, which improves the processing efficiency, but there are still defects: the device uses more than two YAG lasers, but the beam quality of the YAG laser itself is not high, and more than two YAG lasers require two sets of optical paths system, increasing costs. the

Contents of the invention

The object of the present invention is to propose a laser plate roll engraving engraving machine to solve the deficiencies in the prior art. the

The specific plan is: a laser plate roll engraving engraving machine, including: graphics and image processing system, control system, body, optical system, water cooling system and blowing and suction system for the optical system; the body includes a workbench and a protective cover , the workbench includes a front support and a tailstock for supporting the processing plate roller, the front support is fixed on the workbench, the tailstock is set on the guide rail of the workbench, the front support is equipped with a servo motor and an encoder, and the servo motor And the encoder is connected to the main shaft inside the front support; the optical system is arranged on a pallet, and the pallet is arranged on the guide rail of the workbench; the water cooling system and the blowing and suction system of the optical system are installed in the body, and it is characterized in that: The optical system includes: a laser generator, a beam reducer, an acousto-optic deflector, a reflector, a beam expander and an optical engraving head. The laser generator includes an interface with a heat sink, and the output laser enters the acoustic In the light deflector, the double beams of polarized light and the main light generated by it pass through the absorber in front of the 45-degree reflector to block the main light, and the double beams of polarized light enter the beam expander through the 45-degree reflector, and then output through the laser engraving head; The acousto-optic deflector includes: acousto-optic medium, driving power supply, and piezoelectric transducer; the laser generator generates dual beams of polarized light through the acousto-optic deflector. The double beams of polarized light are horizontally tangent and non-interfering. It is independently controlled on and off, and the acousto-optic deflector is connected to the control system through a signal line. the

Wherein, the laser generator is a double-layer fiber laser. the

Wherein, the beam expander includes a height-adjustable adjustment table. the

The invention has the advantages that: the laser generator is a double-layer fiber laser generator, and the double-layer optical fiber has one more layer of inner cladding than the core of the ordinary optical fiber, thereby increasing the diameter of the fiber core and the light receiving angle, and increasing the output energy of the laser ; Furthermore, the acousto-optic deflector is used, and the laser generator generates double beams of polarized light through the acousto-optic deflector. The double-beam polarized light spots are horizontally tangent and non-interfering. The laser can be independently controlled on and off to achieve the purpose of splitting and time-sharing control of the laser, making laser processing more accurate. the

Description of drawings

The present invention will be described in further detail below in conjunction with the accompanying drawings. the

Fig. 1 is a three-dimensional structure diagram of the present invention. the

Figure 2 is a structural diagram of the optical path system. the

Figure 3 is a schematic diagram of the acousto-optic deflector. the

Fig. 4 is a schematic structural diagram of a double-layer optical fiber. the

Detailed ways

As shown in Figures 1 and 2, the present invention includes: a graphic image processing system 1, a control system 2, a body 4, and an optical system 5; wherein the body 4 includes a workbench 6 and a protective cover 3, and the workbench 6 includes a The front support 7 and the tailstock 8 of the roller, the front support 7 is fixed on the workbench 6, the tailstock 8 is arranged on the guide rail of the workbench 6, the front support 7 is equipped with a servo motor 9 and an encoder 10, the servo motor 9 and the encoder 10 are connected to the main shaft inside the front support 7; the optical system 5 is arranged on a pallet 11, and the pallet 11 is arranged on the workbench 6; the pallet 11 is provided with: a laser generator 12, a retractable Mirror 13, acousto-optic deflector 14, reflecting mirror 15, beam expander mirror 16, beam expander mirror 16 include a height-adjustable adjustment platform 19 and light carving head 17, and laser generator 12 includes an interface with a heat sink, The output laser enters the acousto-optic deflector 14 through the beam reducer 13, and the double-beam polarized light and the main light generated by it pass through the absorber 18 in front of the reflector 15 to block the main light, and the double-beam polarized light enters the beam expander through the reflector 15 16, and then output through the laser engraving head 17, the double-beam laser level has no interference, and the purpose of light splitting control is achieved. The acousto-optic deflector 14 is connected to the control system 2, and the control system 2 can control the on-off of the laser. According to the needs of processing, The on-off of each laser beam can be controlled, so as to achieve time-sharing control. the

As shown in Figure 3, the control system 2 transmits the processing signal to the driving power supply 22 in real time, and the driving power supply 22 acts on the piezoelectric transducer 21, and the piezoelectric transducer 21 generates ultrasonic waves of corresponding frequency and amplitude and transmits them The acousto-optic medium 20 enables it to generate a corresponding phase grating to realize the time-sharing control of the laser. the

As shown in Figure 4, the laser generator 12 is a double-layer fiber laser, and the double-layer fiber structure includes: a fiber core 26, a protective layer 24, an inner cladding 23, an outer cladding 25, and the inner cladding 23 makes the diameter of the fiber core 26 and light receiving The increased angle can absorb a large amount of high-brightness light, thereby increasing the laser output energy. the

Claims (3)

1. laser roller film engraving machine comprises: graph and image processing system, control system, body, optical system and be used for the water-cooling system and the pressure-vaccum wind system of optical system; Wherein body comprises workbench and protective cover, workbench comprises preceding bearing and the tailstock that is used to support processing version roller, preceding bearing is fixed on the workbench, tailstock is arranged on the guide rail of workbench, preceding bearing is equipped with servomotor and encoder, and servomotor and encoder link to each other with the main shaft of preceding bearing inside; Optical system is arranged on the supporting plate, and supporting plate is arranged on the guide rail of workbench; The water-cooling system of optical system, pressure-vaccum wind system are installed in the body, it is characterized in that: described optical system comprises: laser generator, beam-shrinked mirror, acousto-optic deflection device, speculum, beam expanding lens and light carving head, laser generator comprises a flange-cooled interface, the laser of output enters in the acousto-optic deflection device by beam-shrinked mirror, the two-beam polarisation of its generation and key light block key light by the absorber of 45 degree before the speculums, the two-beam polarisation enters beam expanding lens by 45 degree speculums, again by the output of light carving head; Described acousto-optic deflection device comprises: acousto-optic medium, driving power, PZT (piezoelectric transducer); Laser generator produces the two-beam polarisation by acousto-optic deflection device, and this two-beam polarisation hot spot level is tangent and do not have interference, and every Shu Jiguang can independently separately control its break-make, and acousto-optic deflection device is connected with control system by holding wire.

2. a kind of laser roller film engraving machine according to claim 1 is characterized in that: described laser generator is double-deck optical fiber laser.

3. a kind of laser roller film engraving machine according to claim 1 is characterized in that: beam expanding lens comprises a height adjustable adjustment platform up and down.

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