CN113634911B

CN113634911B - Laser marking system, marking method and batch detection method for metallurgical plates

Info

Publication number: CN113634911B
Application number: CN202111200357.0A
Authority: CN
Inventors: 马鑫; 马刚; 马钰添
Original assignee: Suzhou Riste Intelligent Manufacturing Co ltd
Current assignee: Suzhou Riste Intelligent Manufacturing Co ltd
Priority date: 2021-10-15
Filing date: 2021-10-15
Publication date: 2022-01-04
Anticipated expiration: 2041-10-15
Also published as: CN113634911A

Abstract

The invention discloses a laser marking system, a marking method and a batch detection method for metallurgical plates, wherein the laser marking system comprises a laser module, an optical module and a water cooling device, the laser module comprises a laser generator and a control unit, and the laser generator is a non-pulse laser; the optical module comprises a galvanometer and a field lens; the water cooling device is configured to cool down the laser generator and/or the optical module; under the control of the control unit, the laser generator emits laser with preset output power to the vibrating mirror at a preset frequency, the vibrating mirror is used for reflecting the laser to enable the laser to reach the field lens, the field lens is used for focusing the laser penetrating through the field lens, and then the laser reaching the engraving area enables the surface of the metallurgical plate arranged in the engraving area to display engraving contents, and the engraving contents are in a convex shape and/or a concave shape relative to the surface of the metallurgical plate. The invention can accurately and clearly engrave characters or patterns on the metallurgical plate by using the non-pulse laser, and has high efficiency and good effect.

Description

Laser marking system, marking method and batch detection method for metallurgical plates

Technical Field

The invention relates to the field of laser technology application, in particular to a laser marking system, a marking method and a batch detection method for a metallurgical plate.

Background

Along with the improvement of the research and development technology and the production and manufacturing capability of domestic lasers, the quality level of the lasers is improved, the application fields of the lasers are correspondingly expanded, and meanwhile, the application range in each field is continuously expanded. At present, with the two-part integration development of metallurgical enterprises, the metallurgical smelting enterprises gradually generate the requirements of product traceability and material code identification, and the problems of quick marking, material code carving and the like of metallurgical smelting hot steel billets or steels need to be solved urgently so as to realize the platform automatic management of the product production process.

The traditional metallurgy marking method generally adopts methods such as chemical corrosion, ink code spraying, aluminum powder spraying, mechanical engraving, mechanical stamping and the like, but the methods have the problems of poor performance, low precision, single pattern, high cost and long time consumption, particularly, the chemical corrosion method can cause pollution, and the methods are not beneficial to the automatic management of product production.

Along with the increasing marking demand of the metallurgical industry, laser marking is carried out at the same time, and the laser marking has the characteristics of high marking speed, low running cost, no pollution and the like. At present, laser marking of metallurgical plates is still carried out on pulsed lasers. However, since the power of the pulse laser is very low, only when the pulse laser moves slowly on the metallurgical plate, deep and continuous marking can be formed, which can also lead to repeated marking on certain positions on the plate, so that the marking effect is not good, and the slow movement directly leads to long marking time and low efficiency, and cannot meet the requirement of the process time in industrial production at all. However, if a kilowatt-level high-power continuous laser is used for laser marking, the following defects can be generated:

firstly, the emitted laser has concentrated and continuous high energy, and the control of the laser speed and energy is difficult to realize, so that the imprinting is uncontrollable, for example, the heat effect in the processing process is easy to generate adverse damage to a metallurgical plate to be processed;

secondly, because the continuous laser energy of transmission is too big, in the twinkling of an eye when the laser beam hits metal surface, can form the pit at metal surface, cause partial metal to melt, even the metal splashes, this will lead to appearing inhomogeneous pattern on the metallurgical panel of treating processing, can't guarantee the seal of carving of basic lines, still can cause the clean and tidy degree of metallurgical panel to descend, influence the quality of metallurgical panel, make still need carry out polishing treatment to metallurgical panel in the follow-up work, and the metal splashes still can direct influence and damage the field lens and influence the marking effect.

It has long been recognized in the industry that kilowatt-level, high power, continuous lasers cannot be used as part of a laser marking system, but rather are used in the cutting and welding requirements for steel.

In addition, the problem to be solved in the laser marking process is the influence of high thermal environment on the laser and related equipment. At present, in order to reduce the influence of high thermal environment, a cooling device is often installed at the position of a laser light source, namely a water cooling jacket, a heat pipe radiator and an air cooling radiator are installed, but a common water cooling radiator needs a cooling water circulation system, for a split type marking system, a complex water cooling radiator loop design needs to be carried out, or a circulating water system is designed respectively, so that the problems of design and complex matching can occur, and the cost is increased.

With the development of laser marking technology, besides the requirement of realizing basic laser marking (logo, character, two-dimensional code, etc.), the requirement of marking different colors is also generated. In order to realize color marking, the prior art forms oxide films with different thicknesses on the surface of metal to obtain a color effect or a color pattern, but the color of the metal to be processed before oxidation is different from that after oxidation, otherwise, color marking cannot be realized, which greatly limits the popularization of color marking.

In view of the above, there is a need for a solution that allows precise marking on metallurgical plates by using a high power continuous laser of the kilowatt level.

Disclosure of Invention

In order to solve the problems in the prior art, the invention provides a laser marking system, a marking method and a batch detection method for a metallurgical plate, which can accurately and clearly mark characters or patterns on the metallurgical plate, and the technical scheme is as follows:

on one hand, the invention provides a laser marking system for a metallurgical plate, which is used for marking the metallurgical plate in a marking area, and comprises a laser module, an optical module and a water cooling device, wherein the laser module and the water cooling device are arranged in an outer box body, the optical module is arranged in a first protective shell, and the outer box body and the first protective shell are arranged in a separated manner;

the laser module comprises a laser generator, the laser generator is arranged in a first sub-box body in the outer box body, and the laser generator is a non-pulse laser;

the optical module comprises a galvanometer and a field lens, and is arranged in the first protective shell;

the water cooling device is arranged in a second sub-box body in the outer box body, the second sub-box body is provided with a heat insulation layer, and the water cooling device is configured to cool the laser generator and/or the optical module;

the laser module further comprises a control unit, under the control of the control unit, the laser generator emits laser with preset output power to the vibrating mirror with preset frequency, the vibrating mirror is used for reflecting the laser to enable the laser to reach the field lens, the field lens is used for enabling the laser penetrating through the field lens to be focused, the laser reaching the engraving area enables the surface of the metallurgical plate arranged in the engraving area to display engraving content, and the engraving content is in a protruding shape and/or a recessed shape relative to the surface of the metallurgical plate.

Further, the laser generator is a continuous laser, under the control of the control unit, the continuous laser sequentially outputs laser at a set working frequency, and the power of the laser continuously output in each period is constant to a set output power value.

As an alternative, a field lens with a focal length ranging from 200mm to 400mm is selected, the output power of the continuous laser is set within a range from 100W to 800W, the working frequency of the continuous laser is set within a range from 10kHz to 60kHz, and the rotation rate of the galvanometer is set within a range from 5mm/s to 200mm/s, so that the engraved content is convex relative to the surface of the metallurgical plate.

As another alternative, a field lens with a focal length range of 150mm to 400mm is selected, the output power of the continuous laser is set in a range of 1400W to 2200W, the working frequency of the continuous laser is set in a range of 10kHz to 60kHz, the rotation rate of the vibrating mirror is set in a range of 800mm/s to 2200mm/s, and the engraved content is engraved once or multiple times in the same area, so that the engraved content is recessed relative to the surface of the metallurgical plate, and the effect of different colors of reverse-color metal patterns can be formed according to different depths of the recess.

Further, the optical module further comprises a collimator, which is arranged between the continuous laser and the galvanometer, and the collimator enables the spot diameter of the laser at the field lens to be in the range of 10-50 microns.

Further, the laser module also comprises a laser joint which is connected with the laser generator through an optical fiber; the output end of the laser joint is connected with the input end of the collimator, and the output end of the collimator emits the shaped laser to the galvanometer;

the control unit is electrically connected with the scanning system of the galvanometer through a signal line, and the scanning system of the galvanometer controls the rotating angle and the rotating speed of the galvanometer according to a received control signal from the control unit.

Further, the water cooling device is configured to cool the laser generator, a first water path pipeline is arranged in the first sub-box body, and a second water path pipeline is arranged in the water cooling device;

a first water inlet interface and a first water outlet interface are arranged on the box wall of the first sub-box body, and two ends of the first waterway pipeline are respectively connected with the first water inlet interface and the first water outlet interface;

a second water inlet interface and a second water outlet interface are arranged on the box wall of the second sub-box body, and two ends of the second waterway pipeline are respectively connected with the second water inlet interface and the second water outlet interface;

the first water inlet interface is communicated with the second water outlet interface, the first water outlet interface is communicated with the second water inlet interface, and then a first water channel pipeline in the first sub-box body and a second water channel pipeline of the water cooling device form a first circulating water channel;

and an air outlet communicated with the outside of the outer box body is also formed in the box wall of the second sub-box body and used for discharging airflow in the second sub-box body.

Further preferably, the water cooling device further comprises a water pump, a water cooling block, a heat exchanger and a cooling fan which are arranged in the second sub-box body, the water pump, the water cooling block and the heat exchanger are arranged in the first circulating water path, the heat exchanger is arranged in an area opposite to the air outlet, and the cooling fan is arranged in an area opposite to the heat exchanger.

Further, the water cooling device is configured to cool the optical module, a third water channel pipeline is arranged in the first protective shell, and a fourth water channel pipeline is arranged in the water cooling device;

a third water inlet port and a third water outlet port are formed in the box wall of the first protection shell, the third water channel pipeline sequentially extends on the inner side walls of the first protection shell, and two ends of the third water channel pipeline are respectively connected with the third water inlet port and the third water outlet port;

a fourth water inlet interface and a fourth water outlet interface are arranged on the box wall of the second sub-box body, and two ends of the fourth waterway pipeline are respectively connected with the fourth water inlet interface and the fourth water outlet interface;

the fourth water inlet interface is communicated with the third water outlet interface, the fourth water outlet interface is communicated with the third water inlet interface, and then a third water path pipeline in the first protection shell and a fourth water path pipeline of the water cooling device form a second circulating water path.

Furthermore, the optical module further comprises a collimator, the laser generator, the optical fiber, the laser joint and the collimator are sequentially connected, and the collimator is installed on the outer wall of the first protective shell through an installation joint;

the laser joint is provided with two cooling interfaces and a sub-cooling water path between the two cooling interfaces, the mounting joint of the collimator is provided with two cooling interfaces and a sub-cooling water path between the two cooling interfaces, the field lens is provided with two cooling interfaces and a sub-cooling water path between the two cooling interfaces, the mounting joint of the laser joint and the collimator and the respective cooling interface of the field lens and the third water inlet and the third water outlet on the first protective shell are connected with the fourth water inlet and the fourth water outlet on the wall of the second sub-box body in a non-directional sequence, so that the mounting joint of the laser joint and the collimator, the respective sub-cooling water path of the field lens, the third water path pipeline and the fourth water path pipeline of the water cooling device are in the same circulating water path.

Preferably, the maximum value of the refrigeration power of the water cooling device reaches 2000W, and the maximum value of the working power of the laser generator is 2000W.

Further, first protective housing erects in the top of carving seal region through the stand, the below of field lens still is equipped with protector, protector includes transparent structure's protection lens and sets up the air knife structure of protection lens periphery, through the air current of air knife structure to the center of protection lens below assembles.

The protection device further comprises a first bracket layer, a second bracket layer and a third bracket layer, wherein the first bracket layer, the second bracket layer and the third bracket layer are all of a hollow structure, a first supporting platform protruding inwards is arranged on the inner side wall of the first bracket layer, the first supporting platform is used for supporting the field lens, a second supporting platform protruding inwards is arranged on the inner side wall of the second bracket layer, and the second supporting platform is used for supporting the protection lens;

the first bracket layer is also provided with a vertical wall extending downwards from the lower side of the first bracket, and the second bracket layer is arranged on the inner side of the vertical wall and fixedly connected with the lower surface of the first bracket;

the inner side wall of the third bracket layer is provided with a third bracket platform protruding inwards, the first bracket layer and the third bracket layer are buckled up and down, the vertical wall of the first bracket layer extends into the third bracket layer, and the vertical wall, the inner side wall of the third bracket layer and the third bracket platform form a spacing area;

the first bracket layer is further provided with an air inlet, the air knife structure comprises the air inlet, a spacing area formed by the vertical wall and the inner side wall of the third bracket layer and a spacing area formed by the vertical wall and the third bracket, so that air flow input from the air inlet can reach the lower part of the third bracket layer through the air knife structure.

Preferably, the protective lenses are circular, and the first bracket layer, the second bracket layer and the third bracket layer are all circular rings;

the second bracket layer is fixedly connected with the lower surface of the first bracket through a plurality of screws, and the third bracket layer is fixedly connected with the lower surface of the first bracket layer through a plurality of screws;

under the condition that the first bracket layer is fixedly connected with the third bracket layer, the second bracket layer can be separated from the first bracket layer so as to be used for replacing the protective lens.

In another aspect, the present invention provides a marking method based on the above laser marking system, for marking a metallurgical plate to be marked, where the marking method includes:

and controlling the non-pulse laser to emit laser at a preset working frequency and output power, so that the surface of the metallurgical plate positioned in the imprinting area shows imprinting contents, wherein the imprinting contents are in a convex shape and/or a concave shape relative to the surface of the metallurgical plate.

In another aspect, the present invention provides a method for detecting a steel plate batch based on the above laser marking system, comprising the following steps:

sequentially conveying the produced steel plates to an identification platform;

the method comprises the following steps that a laser marking system is utilized to mark the surface of a steel plate conveyed to an identification platform, wherein the surface corresponds to a marking area, the laser marking system comprises a non-pulse laser, the non-pulse laser sequentially outputs laser at a set working frequency, the power of the laser continuously output in each period is constant to be a set output power value, marking content is enabled to be convex and/or concave relative to the surface of the steel plate, and the marking content comprises preset batch identification;

performing quality spot check on the steel plates subjected to the marking, and if the spot check is unqualified, searching the steel plates belonging to the same batch as the steel plates subjected to the spot check and unqualified according to the batch marks marked on the steel plates;

and (4) carrying out corresponding treatment after detection on all the steel plates of the batch.

The technical scheme provided by the invention has the following beneficial effects:

a. the convex marking or concave marking on the surface of the metallurgical plate is realized by using a non-pulse laser, the marking content is clear and accurate, and the marking speed is high;

b. on the premise of ensuring the normal operation of the system in a high-heat environment, the water cooling device and the laser module are integrated, so that the cost is greatly reduced.

The invention utilizes a non-pulse laser to carry out laser marking on a metallurgical plate, overcomes the technical prejudice in the industry (because the energy of a high-power laser beam is too high, the marking content meeting the marking requirement cannot be formed on the plate by utilizing the non-pulse laser, so that the continuous high-power laser cannot carry out convex or concave marking in the industry, but the working power of the pulse laser used in the industry is too low, the energy of the pulse laser beam is low, the marking requirement can be met by carrying out multiple times of marking, the marking efficiency is very low, the consumed time is long, the cost is increased, and meanwhile, the repeated marking brings the defect of poor marking effect), the cost is reduced and the engraving precision and efficiency are ensured. In addition, based on this laser marking system not only can carry out the batch detection of metallurgical panel, can also carry out relevant anti-fake discernment.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present application, and other drawings can be obtained by those skilled in the art without creative efforts.

Fig. 1 is a schematic diagram of a laser marking system according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a laser marking system according to an embodiment of the present invention;

FIG. 3 is a rear view of FIG. 2;

fig. 4 is a schematic view of a first partial structure of a laser marking system according to an embodiment of the present invention;

fig. 5 is a second partial structural schematic view of a laser marking system according to an embodiment of the present invention;

fig. 6 is a schematic diagram of a third partial structure of a laser marking system according to an embodiment of the present invention;

FIG. 7 is a front view of FIG. 6;

FIG. 8 is a schematic cross-sectional view of a protective device of a laser marking system according to an embodiment of the present invention;

FIG. 9 is an exploded view of FIG. 8;

fig. 10 is a schematic diagram of a laser marker according to an embodiment of the present invention.

Wherein the reference numerals include: 1-an outer box body, 2-a laser generator, 3-a water cooling device, 41-a first water inlet interface, 42-a first water outlet interface, 43-a second water inlet interface, 44-a second water outlet interface, 45-a third water inlet interface, 46-a third water outlet interface, 47-a fourth water inlet interface, 48-a fourth water outlet interface, 51-a first protective shell, 52-a second protective shell, 6-a third waterway pipeline, 71-a laser joint, 72-a collimator, 73-an installation joint, 74-an optical fiber, 81-a first bracket layer, 811-a first bracket, 812-a vertical wall, 813-an air inlet hole, 82-a second bracket layer, 821-a second bracket, 83-a third bracket layer, 831-a third bracket, 84-a protective lens, 9-display screen, 10-lighthouse, 11-upright post, 12-pulley.

Detailed Description

In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, apparatus, article, or device that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or device.

In one embodiment of the invention, a laser marking system for a metallurgical plate is provided, and comprises a laser module, an optical module and a water cooling device 3, wherein the laser module comprises a laser generator 2, a laser joint 71 and a control unit, the laser generator 2 is a non-pulse laser, and the maximum working power of the laser generator 2 is 2000W; the optical module includes a collimator 72, a galvanometer, and a field lens.

As shown in fig. 2, 3, 4, and 7, the outer box 1 includes a first sub-box and a second sub-box, the laser generator 2 is disposed in the first sub-box, the water cooling device 3 is disposed in the second sub-box, the laser generator 2 is connected to the laser connector 71 through the optical fiber 74, the laser generator 2 is connected to the optical fiber 74, the laser connector 71 and the collimator 72 are sequentially connected, the collimator 72 is mounted on the outer wall of the first protection shell 51 through the mounting connector 73, the laser connector 71, the collimator 72 and the mounting connector 73 are disposed in the second protection shell 52, the galvanometer and the field lens are disposed in the first protection shell 51.

It should be noted that, as shown in fig. 5, the first protective shell 51 and the second protective shell 52 are separately disposed from the outer box 1, in this embodiment, the first protective shell 51 and the second protective shell 52 are disposed on a vertical column 11 that is separate from the outer box 1, and preferably, the vertical column 11 is a double-sided vertical column, and a pulley 12 is disposed on the vertical column 11, so that the vertical column 11 can be conveniently moved to any position, so as to drive the first protective shell 51 and the second protective shell 52 to move above the imprinting area. In addition, in this embodiment, the outer box 1 is also provided with pulleys 12 to facilitate movement, and the positions and the number of the pulleys 12 are not particularly limited.

As shown in fig. 1, the control unit is connected to the laser generator 2 to control parameters such as the working frequency and the working power of the laser emitted by the laser generator 2, and the control unit is further connected to the galvanometer to control parameters such as the rotation angle, the rotation direction, the moving speed, and the displacement of the galvanometer, so as to mark predefined marking content on the metallurgical plate based on the parameters. Specifically, in this embodiment, the control unit is electrically connected to the scanning system of the galvanometer through a signal line, the scanning system of the galvanometer controls the rotation angle and the rotation direction of the galvanometer according to a received control signal from the control unit, and the laser generator 2 is similar to the galvanometer, which is not described herein again, and it should be noted that the connection manner may be the signal line exemplified above, or may be a communication module, which does not limit the protection scope of the present invention.

Specifically, as shown in fig. 1, under the control of the control unit, the laser generator 2 emits laser light according to parameters such as a preset working frequency and a preset working power, the laser light is transmitted through the optical fiber 74, and is shaped by the collimator 72, the laser light is emitted to the galvanometer, the galvanometer can reflect the laser light to reach the field lens, the field lens focuses the laser light penetrating through the field lens to the engraving area, and the laser light displays engraving content on the surface of the metallurgical plate disposed in the engraving area, wherein the engraving content is convex and/or concave relative to the surface of the metallurgical plate. It should be noted that the engraving content includes not only the batch number of the metallurgical plate, but also the LOGO and the anti-counterfeiting number, so the laser engraving system can not only perform batch detection, but also perform anti-counterfeiting identification, and the specific engraving content includes, but is not limited to, one or more of raised or recessed characters, figures, numbers, letters, bar codes and two-dimensional codes.

In one embodiment of the present invention, the laser generator 2 is a continuous laser, the continuous laser sequentially outputs laser light at a set operating frequency under the control of the control unit, and the power of the laser light continuously output in each period is constant at a set output power value.

Specifically, when a field selection lens with the focal length ranging from 200mm to 400mm is used, the output power of the continuous laser is set within the range from 100W to 800W, the working frequency of the continuous laser is set within the range from 10kHz to 60kHz, and the rotation rate of the vibrating mirror is set within the range from 5mm/s to 200mm/s, so that the marked content is marked on the surface of the metallurgical plate in a protruding mode at one time, preferably, the output power of the continuous laser is 500W, the working frequency of the continuous laser is 50kHz, and the rotation rate of the vibrating mirror is 100 mm/s.

When the field lens is selected within the focal length range of 150mm to 400mm, the output power of the continuous laser is set within the range of 1400W to 2200W, the working frequency of the continuous laser is set within the range of 10kHz to 60kHz, and the rotation rate of the vibrating mirror is set within the range of 800mm/s to 2200mm/s, so that the engraving content is displayed on the surface of the metallurgical plate in a concave manner at one time.

In an embodiment of the present invention, the collimator 72 is a QBH collimator, and the laser transmitted by the optical fiber 74 can be shaped by the collimator 72, and then the laser can be reflected by the galvanometer and then hit the field lens, and the diameter of the laser spot ranges from 10 micrometers to 50 micrometers.

In an embodiment of the present invention, the water cooling device 3 is used for cooling the laser generator 2. A first water channel pipeline is arranged in the first sub-tank body, as shown in fig. 3, a first water inlet port 41 and a first water outlet port 42 are arranged on the tank wall of the first sub-tank body, one end of the first water channel pipeline is connected with the first water inlet port 41, and the other end of the first water channel pipeline is connected with the first water outlet port 42; a second water channel pipeline is arranged in the water cooling device 3, a second water inlet interface 43 and a second water outlet interface 44 are arranged on the wall of the second sub-tank body, one end of the second water channel pipeline is connected with the second water inlet interface 43, and the other end of the second water channel pipeline is connected with the second water outlet interface 44. Specifically, the first water inlet port 41 is communicated with the second water outlet port 44, the first water outlet port 42 is communicated with the second water inlet port 43, and then the first water path pipeline in the first sub-box and the second water path pipeline in the water cooling device 3 form a first circulation water path, so that the laser generator 2 is cooled through the first circulation water path. In the present embodiment, as shown in fig. 1, the first circulation water path is a cold water path.

In an embodiment of the present invention, the water cooling device 3 is further configured to cool the optical module. As shown in fig. 3, 6 and 7, a third waterway pipeline 6 is arranged in the first protective shell 51, a third water inlet 45 and a third water outlet 46 are arranged on a wall of the first protective shell 51, the third waterway pipeline 6 sequentially extends on a plurality of inner side walls of the first protective shell 51, one end of the third waterway pipeline 6 is connected with the third water inlet 45, and the other end is connected with the third water outlet 46; still be equipped with fourth water route pipeline in the water cooling plant 3, still be equipped with fourth interface 47 and the fourth interface 48 of going out of intaking on the tank wall of second subbox, the one end of fourth water route pipeline with the fourth interface 47 of going into is connected, the other end with the fourth interface 48 of going out of is connected. Specifically, the third water inlet port 45 is communicated with the fourth water outlet port 48, the third water outlet port 46 is communicated with the fourth water inlet port 47, and then the third water channel pipe 6 in the first protective shell 51 and the fourth water channel pipe of the water cooling device 3 form a second circulating water channel, and the optical module is cooled through the second circulating water channel. In the present embodiment, as shown in fig. 1, the second circulation water path is a normal temperature water path.

Furthermore, two cooling interfaces and a sub cooling water path therebetween are arranged on the laser joint 71, two cooling interfaces and a sub cooling water path therebetween are arranged on the mounting joint 73 of the collimator 72, two cooling interfaces and a sub cooling water path therebetween are arranged at the field lens, and the cooling interface at the laser joint 71, the cooling interface at the mounting joint 73 of the collimator 72, the cooling interface at the field lens, the third water inlet 45, the third water outlet 46, the fourth water inlet 47, and the fourth water outlet 48 are connected in a non-directional order, so that the sub cooling water path at the laser joint 71, the sub cooling water path at the mounting joint 73, the sub cooling water path at the field lens, the third water path pipe 6, and the fourth water path pipe are in the same circulation water path.

Specifically, in this embodiment, the fourth water outlet port 48 is connected to the third water inlet port 45, the third water inlet port 45 is connected to one cooling port at the field lens, the other cooling port at the field lens is connected to one cooling port at the galvanometer lens, the other cooling port at the galvanometer lens is connected to one cooling port at the mounting joint 73 of the collimator 72, the other cooling port at the mounting joint 73 is connected to one cooling port at the laser joint 71, the other cooling port at the laser joint 71 is connected to the third water outlet port 46, the third water outlet port 46 is connected to the fourth water inlet port 47, and when the ports are communicated with each other, the normal temperature circulating water circulates along the fourth water passage pipe, the third water passage pipe 6 and the sub-cooling water passages, so as to cool down the optical module. It should be noted that the connection sequence described in this paragraph is only an example, and does not limit the scope of the present invention.

And a heat insulation layer and an air outlet are further arranged in the second sub-box body, and the air outlet is communicated with the outside of the outer box body 1 so as to discharge air flow in the second sub-box body. The water cooling device 3 further comprises a water pump, a water cooling block, a heat exchanger and a heat dissipation fan, wherein the water pump, the water cooling block, the heat exchanger and the heat dissipation fan are arranged in the second sub-box body, the heat exchanger is arranged in an area opposite to the air outlet, and the heat dissipation fan is arranged in an area opposite to the heat exchanger. The water pump, the water cooling block and the heat exchanger are arranged in the first circulating water path to form a cold water path.

In addition, the maximum value of the cooling power of the water cooling device 3 reaches 2000W, in this embodiment, the actual cooling power of the water cooling device 3 is 1700W, and the third waterway pipeline 6 is made of a heat conducting material.

In an embodiment of the invention, a protective device is further arranged below the field lens for protecting the field lens, so that the splashed metal is prevented from damaging the field lens, and the marking effect is further influenced.

As shown in fig. 8 and 9, the protecting device includes a first bracket layer 81, a second bracket layer 82, and a third bracket layer 83, and the first bracket layer 81, the second bracket layer 82, and the third bracket layer 83 are all hollow structures. An air inlet hole 813 is formed in the first bracket layer 81, a first bracket 811 protruding inwards is arranged on the inner side wall of the first bracket layer 81, the first bracket 811 is used for supporting the field lens, and a vertical wall 812 extending downwards from the lower side of the first bracket 811 is further arranged on the first bracket layer 81; the second bracket layer 82 is arranged inside the vertical wall 812 and fixedly connected with the lower surface of the first bracket 811, the inner side wall of the second bracket layer 82 is provided with a second bracket 821 protruding inwards, and the second bracket 821 is used for supporting the protective lens 84; the inner side wall of the third bracket layer 83 is provided with a third bracket 831 protruding inwards, the first bracket layer 81 and the third bracket layer 83 are buckled up and down, the standing wall 812 of the first bracket layer 81 extends into the third bracket layer 83, and the standing wall 812, the inner side wall of the third bracket layer 83 and the third bracket 831 form a spacing area.

As shown in fig. 8, the protection device further includes a protection lens 84 having a transparent structure and an air knife structure disposed on the periphery of the protection lens 84, where the air knife structure includes the air inlet hole 813, a spacing area formed by the standing wall 812 and the inner side wall of the third bracket layer 83, and a spacing area formed by the standing wall 812 and the third bracket 831, so that the air flow input from the air inlet hole 813 can reach the lower side of the third bracket layer 83 through the air knife structure, that is, the air flow converges toward the center below the protection lens 84.

In this embodiment, the protective lens 84 is circular; the first bracket layer 81, the second bracket layer 82 and the third bracket layer 83 are all circular rings; the first saddle 811, the second saddle 821, the third saddle 831 and the vertical wall 812 are all arranged circumferentially continuously, and the outer side of the vertical wall 812 is provided with an inclined plane inclined from top to bottom inwards, and the included angle between the inclined plane and the corresponding vertical plane is 60 degrees; the air inlet holes 813 extend inwards from the side wall of the first bracket layer 81, and the number of the air inlet holes 813 is two and the two air inlet holes are respectively positioned at the equal division points of the circumference where the first bracket layer 81 is positioned; the second bracket layer 82 is fixedly connected with the lower surface of the first bracket 811 through a plurality of screws, and the third bracket layer 83 is fixedly connected with the lower surface of the first bracket layer 81 through a plurality of screws. It should be noted that the first saddle 811 and the second saddle 821 may also be discontinuously arranged at intervals, the included angle between the inclined surface at the vertical wall 812 and the corresponding vertical surface ranges from 15 ° to 89 °, the number of the air inlet holes 813 may be one or more, and the connection manner of the saddle and the saddle is not limited to screw connection.

In addition, under the condition that first bracket layer 81 with third bracket layer 83 fixed connection, second bracket layer 82 can with first bracket layer 81 separation for be used for changing protective glass 84, convenient and fast practices thrift maintenance duration.

As shown in fig. 2 and 3, a display screen 9, a lighthouse 10 and a pulley 12 are further disposed on the outer box 1, in this embodiment, the display screen 9 is a touch screen, and a user can adjust relevant parameters of the laser generator 2 and the galvanometer through the touch screen to control the laser marking system to operate.

In an embodiment of the present invention, as shown in fig. 10, a laser marking machine for a metallurgical plate is provided, and the laser marking machine includes a marking control cabinet and a marking output platform, wherein the marking control cabinet includes a human-machine interface, an industrial personal computer, a laser, and a water cooling device 3, and the marking output platform includes a QBH connector, a galvanometer, a field lens, and an air curtain. The laser is connected with the human-computer interface through the industrial personal computer, generates laser and outputs the laser to the vibrating mirror through the QBH joint, and the laser is output to the field mirror after the vibrating mirror to realize marking of steel.

The water cooling device 3 is used for radiating heat of the laser; the laser adopts a 1.5KW laser, the 1.5KW laser is controlled and generated through an industrial personal computer starting signal, and the laser is externally output to the vibrating mirror through the QBH joint; the galvanometer adopts a film-coated galvanometer, the requirement on a high-power laser is met, the input of the mark is realized through a human-computer interface, and meanwhile, the industrial personal computer converts the mark into a driving signal to drive the galvanometer to operate, so that the marking of the mark is realized; the field lens is treated by adopting a replaceable coating with a focal length of 330mm, so that a large amount of hot sparks generated during marking are prevented from splashing to the field lens; the air curtains are arranged on two sides of the field lens, form an included angle of 10 degrees with the field lens, and downwards spray air of 0.5Mpa, so that a large amount of hot sparks generated during marking are prevented from splashing to the field lens.

The laser marking machine shortens marking time, shortens the marking time to 60-70 seconds, deepens the marking depth, enables the marking depth to reach 0.01-2 mm, and prolongs the service life of the field lens through air curtains, film coating and other modes.

In an embodiment of the present invention, there is provided a marking method for marking a metallurgical plate to be marked by using the above-mentioned laser marking system or laser marking machine, the marking method including:

The working process of the non-pulse laser used in the marking method and the working process of the laser marking machine or the non-pulse laser used in the laser marking system for the metallurgical plates in the embodiments belong to the same idea, and the whole content of the laser marking machine or the laser marking system for the metallurgical plates in the embodiments is incorporated into the embodiments of the marking method by full-text reference, and is not described again.

In one embodiment of the present invention, there is provided a steel sheet batch inspection method including the steps of:

sequentially conveying the produced steel plates to an identification platform;

utilizing a laser marking system to mark the surface of the steel plate conveyed to the identification platform, which corresponds to a marking area, wherein the laser marking system comprises a non-pulse laser which sequentially outputs laser at a set working frequency, the power of the laser continuously output in each period is constant to be a set output power value, so that the marking content is in a convex shape and/or a concave shape relative to the surface of the steel plate, and the marking content comprises a preset batch identification;

It should be noted that, the steel plate batch detection method may control the rotation angle and rotation speed of the galvanometer according to the pre-acquired conveying speed of the steel plate and the current marking content, so as to complete laser marking in the steel plate conveying process, or may also stop for a preset time to perform marking in the steel plate conveying process, without limiting the protection scope of the present invention; in addition, the working process of the laser marking system utilized by the steel plate batch detection method and the working process of the laser marking machine or the laser marking system for the metallurgical plates in the embodiments belong to the same idea, and the whole content of the laser marking machine or the laser marking system for the metallurgical plates in the embodiments is incorporated into the steel plate batch detection method in a full-text reference manner, so that the details are not repeated.

In one embodiment of the invention, a method for detecting authenticity of a steel plate is provided, which comprises the following steps:

sequentially conveying the produced steel plates to an identification platform;

utilizing a laser marking system to mark the surface of the steel plate conveyed to the identification platform, which corresponds to a marking area, wherein the laser marking system comprises a non-pulse laser which sequentially outputs laser at a set working frequency, the power of the laser continuously output in each period is constant to be a set output power value, so that the marking content is convex and/or concave relative to the surface of the steel plate, and the marking content comprises a preset LOGO identification and/or anti-counterfeiting number;

performing false and false sampling inspection on the steel plate after the marking is finished, and if the marked LOGO mark or the anti-counterfeiting number on the steel plate does not accord with a preset real LOGO mark or an anti-counterfeiting number, determining that the steel plate is a counterfeit product;

the steel plate is subjected to a corresponding treatment, such as a destruction or scrapping treatment.

It should be noted that the working process of the laser marking system used in the steel plate authenticity detection method and the working process of the laser marking machine or the laser marking system for metallurgical plates described in the above embodiments belong to the same idea, and the entire contents of the laser marking machine or the laser marking system for metallurgical plates described in the above embodiments are incorporated into the steel plate authenticity detection method embodiments by way of full-text reference, and are not described again.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The foregoing is directed to embodiments of the present application and it is noted that numerous modifications and adaptations may be made by those skilled in the art without departing from the principles of the present application and are intended to be within the scope of the present application.

Claims

1. The laser marking system for the metallurgical plate is used for marking the metallurgical plate in a marking area, and is characterized by comprising a laser module, an optical module and a water cooling device (3), wherein the laser module and the water cooling device (3) are arranged in an outer box body (1), the optical module is arranged in a first protective shell (51), and the outer box body (1) and the first protective shell (51) are arranged in a separated mode;

the laser module comprises a laser generator (2), the laser generator (2) is arranged in a first sub-box body in the outer box body (1), the laser generator (2) is a non-pulse laser, and the laser generator (2) is a continuous laser;

the optical module comprises a galvanometer and a field lens, and is arranged in the first protective shell (51);

the water cooling device (3) is arranged in a second sub-box body in the outer box body (1), the second sub-box body is provided with a heat insulation layer, and the water cooling device (3) is configured to cool the laser generator (2) and/or the optical module;

the laser module still includes the control unit, under the control of control unit, laser generator (2) with preset frequency to the galvanometer transmission preset output power's laser, and the power of the laser of continuous output is for the output power value of settlement in every cycle, the galvanometer is used for reflecting laser and makes it reach the field lens, the field lens is used for making the laser focus that sees through it, and then the laser that reaches the seal area makes and places in the metallurgical plate surface appearance seal content in the seal area includes:

selecting a field lens with a focal length range of 200mm to 400mm, setting the output power of the continuous laser in a range of 100W to 800W, setting the working frequency of the continuous laser in a range of 10kHz to 60kHz, and setting the rotation rate of the vibrating mirror in a range of 5mm/s to 200mm/s so as to enable the engraving content to be convex relative to the surface of the metallurgical plate; and/or the presence of a gas in the gas,

selecting a field lens with a focal length range of 150mm to 400mm, setting the output power of the continuous laser within a range of 1400W to 2200W, setting the working frequency of the continuous laser within a range of 10kHz to 60kHz, setting the rotation rate of the vibrating mirror within a range of 800mm/s to 2200mm/s, and carrying out one-time or multiple-time engraving on the engraved content in the same area so as to enable the engraved content to be concave relative to the surface of the metallurgical plate.

2. The laser marking system for metallurgical plates according to claim 1, wherein the optical module further comprises a collimator (72) disposed between the continuous laser and the galvanometer, and the collimator (72) provides a spot diameter of the laser at the field lens in a range of 10 to 50 microns.

3. Laser marking system for metallurgical plates according to claim 2, characterized in that said laser module further comprises a laser joint (71) connected to said laser generator (2) by means of an optical fiber (74); the output end of the laser joint (71) is connected with the input end of the collimator (72), and the output end of the collimator (72) emits the shaped laser to the galvanometer;

4. The laser marking system for metallurgical plates according to claim 1, characterized in that the water cooling device (3) is configured to cool the laser generator (2), a first water channel is provided in the first sub-box, and a second water channel is provided in the water cooling device (3);

a first water inlet connector (41) and a first water outlet connector (42) are arranged on the wall of the first sub-tank body, and two ends of the first waterway pipeline are respectively connected with the first water inlet connector (41) and the first water outlet connector (42);

a second water inlet connector (43) and a second water outlet connector (44) are arranged on the wall of the second sub-tank body, and two ends of the second waterway pipeline are respectively connected with the second water inlet connector (43) and the second water outlet connector (44);

the first water inlet port (41) is communicated with the second water outlet port (44), the first water outlet port (42) is communicated with the second water inlet port (43), and a first water channel pipeline in the first sub-box body and a second water channel pipeline of the water cooling device (3) form a first circulating water channel;

and an air outlet communicated with the outside of the outer box body (1) is also formed in the box wall of the second sub-box body and used for discharging airflow in the second sub-box body.

5. The laser marking system for metallurgical plates according to claim 4, wherein the water cooling device (3) further comprises a water pump, a water cooling block, a heat exchanger and a cooling fan which are arranged in the second sub-box body, wherein the water pump, the water cooling block and the heat exchanger are arranged in the first circulating water path, the heat exchanger is arranged in an area opposite to the air outlet, and the cooling fan is arranged in an area opposite to the heat exchanger.

6. The laser marking system for metallurgical plates according to claim 1, wherein the water cooling device (3) is configured to cool the optical module, a third water channel (6) is provided in the first protective shell (51), and a fourth water channel is provided in the water cooling device (3);

a third water inlet port (45) and a third water outlet port (46) are formed in the box wall of the first protective shell (51), the third waterway pipeline (6) sequentially extends on the inner side walls of the first protective shell (51), and two ends of the third waterway pipeline are respectively connected with the third water inlet port (45) and the third water outlet port (46);

a fourth water inlet connector (47) and a fourth water outlet connector (48) are arranged on the wall of the second sub-tank body, and two ends of the fourth waterway pipeline are respectively connected with the fourth water inlet connector (47) and the fourth water outlet connector (48);

the fourth water inlet interface (47) is communicated with the third water outlet interface (46), the fourth water outlet interface (48) is communicated with the third water inlet interface (45), and then the third water channel pipeline (6) in the first protection shell (51) and the fourth water channel pipeline of the water cooling device (3) form a second circulating water channel.

7. The laser marking system for metallurgical plates according to claim 6, characterized in that the optical module further comprises a collimator (72), the laser generator (2), the optical fiber (74), the laser joint (71) and the collimator (72) are connected in sequence, the collimator (72) is mounted at the outer wall of the first protective case (51) through a mounting joint (73);

two cooling interfaces and a sub-cooling water channel between the two cooling interfaces are arranged on the laser joint (71), the mounting joint (73) of the collimator (72) is provided with two cooling interfaces and a sub-cooling water path between the two cooling interfaces, two cooling interfaces and sub-cooling water paths between the two cooling interfaces are arranged at the field lens, the laser joint (71), the mounting joint (73) of the collimator (72), the respective cooling interfaces at the field lens, the third water inlet interface (45) and the third water outlet interface (46) on the first protective shell (51) are connected with the fourth water inlet interface (47) and the fourth water outlet interface (48) on the wall of the second sub-box body in a non-directional sequence, so that the laser joint (71), the mounting joint (73) of the collimator (72), the sub cooling water channel of the field lens, the third water channel pipeline (6) and the fourth water channel pipeline of the water cooling device (3) are positioned in the same circulating water channel.

8. Laser marking system for metallurgical plates according to any of the claims 4 to 7, characterized by the fact that the cooling power of the water cooling device (3) reaches a maximum of 2000W and the working power of the laser generator (2) reaches a maximum of 2000W.

9. The laser marking system for metallurgical plates according to claim 1, wherein the first protective shell (51) is erected above the marking area through a column (11), a protective device is further arranged below the field lens, the protective device comprises a protective lens (84) with a transparent structure and an air knife structure arranged on the periphery of the protective lens (84), and air flow passing through the air knife structure converges towards the center below the protective lens (84).

10. The laser marking system for metallurgical plates according to claim 9, wherein the protective device further comprises a first bracket layer (81), a second bracket layer (82) and a third bracket layer (83), wherein the first bracket layer (81), the second bracket layer (82) and the third bracket layer (83) are all hollow structures, an inner side wall of the first bracket layer (81) is provided with a first boss (811) protruding inwards, the first boss (811) is used for supporting the field lens, an inner side wall of the second bracket layer (82) is provided with a second boss (821) protruding inwards, and the second boss (821) is used for supporting the protective lens (84);

the first bracket layer (81) is further provided with a vertical wall (812) extending downwards from the lower side of the first bracket (811), and the second bracket layer (82) is arranged on the inner side of the vertical wall (812) and fixedly connected with the lower surface of the first bracket (811);

the inner side wall of the third bracket layer (83) is provided with a third bracket platform (831) protruding inwards, the first bracket layer (81) and the third bracket layer (83) are buckled up and down, a standing wall (812) of the first bracket layer (81) extends into the third bracket layer (83), and the standing wall (812) and the inner side wall of the third bracket layer (83) and the third bracket platform (831) form a spacing area;

still be equipped with inlet port (813) on first bracket layer (81), the air knife structure includes inlet port (813), the interval region that founding wall (812) and third bracket layer (83) inboard wall formed, the interval region that founding wall (812) and third saddle (831) formed for the air current of following inlet port (813) input can pass through the air knife structure and reach the below of third bracket layer (83).

11. The laser marking system for metallurgical plates according to claim 10, wherein the protective lens (84) is circular, and the first, second and third carrier layers (81, 82, 83) are all circular;

the second bracket layer (82) is fixedly connected with the lower surface of the first bracket table (811) through a plurality of screws, and the third bracket layer (83) is fixedly connected with the lower surface of the first bracket layer (81) through a plurality of screws;

the second carrier layer (82) can be separated from the first carrier layer (81) for replacing the protective lens (84) with the first carrier layer (81) and the third carrier layer (83) fixedly connected.

12. An engraving method based on the laser marking system of claim 1, which is used for marking the metallurgical plate to be marked, and comprises the following steps:

13. A steel plate batch detection method based on the laser marking system of claim 1, characterized by comprising the following steps:

sequentially conveying the produced steel plates to an identification platform;