阅读说明：本技术 一种激光打标系统 (Laser marking system ) 是由 吴加富 缪磊 马伟 冯小平 杜高峰 王文军 于 2019-10-31 设计创作，主要内容包括：本发明涉及激光打标设备技术领域,具体涉及一种激光打标系统,旨在解决现有技术中重复开关激光,重复定位的打标方式大大降低了打标的速度,降低了加工效率的问题,其技术要点在于包括传送带,设置于工作台上,用于不间断传输工件；激光器,设置于工作台上,用于对工件进行激光打标；回转机构,设置于工作台上,用于对工件进行回转动作；翻转机构,设置于工作台上,用于对工件进行翻转动作；检测机构,设置于工作台上,用于读取工件上的打标图案。本发明有效提高整个系统的自动化程度,大幅度提高了打标的速度和加工效率。(The invention relates to the technical field of laser marking equipment, in particular to a laser marking system, which aims to solve the problems that the marking speed is greatly reduced and the processing efficiency is reduced by repeatedly switching on and off lasers and repeatedly positioning the marking mode in the prior art; the laser is arranged on the workbench and used for carrying out laser marking on the workpiece; the rotating mechanism is arranged on the workbench and is used for rotating the workpiece; the turnover mechanism is arranged on the workbench and used for turning over the workpiece; and the detection mechanism is arranged on the workbench and used for reading the marking patterns on the workpiece. The invention effectively improves the automation degree of the whole system and greatly improves the marking speed and the processing efficiency.)

1. A laser marking system, comprising:

the conveying belt (01) is arranged on the workbench and used for continuously conveying the workpieces;

the laser device (1) is arranged on the workbench and used for carrying out laser marking on the workpiece;

the rotating mechanism (2) is arranged on the workbench and is used for rotating the workpiece;

the turnover mechanism (3) is arranged on the workbench and used for turning over the workpiece;

and the detection mechanism (4) is arranged on the workbench and used for reading the marking pattern on the workpiece.

2. Laser marking system according to claim 1, characterized in that the laser (1) is electrically connected with a control terminal (5), the control terminal (5) comprising:

the marking device comprises an acquisition unit (51) for acquiring a marking image, wherein the marking image comprises a plurality of discrete marking patterns;

the processing unit (52) is used for carrying out region division on the marking patterns, dividing each discrete marking pattern into at least one marking region, correspondingly distributing the marking regions in the at least one region, constructing marking paths in the marking regions in each region, and constructing a routing line in a non-marking region in each region;

and the control unit (53) is used for setting the laser parameters of the laser (1) operation and sequentially carrying out laser marking on each area according to the marking path and the walking line.

3. Laser marking system according to claim 2, characterized in that the laser (1) is an infrared fiber laser.

4. A laser marking system according to claim 3, wherein the laser parameters include pulse width, repetition rate, marking speed and packing density.

5. The laser marking system according to claim 1, wherein the rotating mechanism (2) comprises a lifting member (21) arranged on the workbench, a rotating member (22) is arranged at the bottom of the lifting member (21), a clamping mechanism (23) for taking and placing a workpiece is arranged on one side of the rotating member (22) far away from the lifting member (21), and the lifting member (21), the rotating member (22) and the clamping mechanism (23) cooperate with the laser marking process to complete the rotating action according to a PLC control command.

6. The laser marking system according to claim 5, wherein the lifting member (21) comprises a first cylinder (211), a transmission plate (212) fixedly connected with the rotating member (22) is arranged at the tail end of a piston rod of the first cylinder (211), a plurality of lifting guide rods (213) are symmetrically arranged on the periphery of the transmission plate (212), and the lifting guide rods (213) are fixedly arranged between the transmission plate (212) and the workbench in a penetrating manner;

the rotating part (22) comprises a rotating cylinder (221) arranged on the transmission plate (212), and a transmission block (222) is arranged at the tail end of an output shaft of the rotating cylinder (221).

7. Laser marking system according to claim 6, characterized in that the clamping mechanism (23) comprises a first clamping jaw (231) and a second clamping jaw (232) arranged on the transmission block (222), the first clamping jaw (231) and the second clamping jaw (232) being fixedly connected by means of a clamping jaw cylinder (233).

8. The laser marking system according to claim 1, wherein the turnover mechanism (3) comprises a first sliding member (31) which is arranged on the workbench and is displaced along a horizontal direction, a second sliding member (32) which is displaced along a vertical direction is arranged on the first sliding member (31), a turnover member (33) for taking and placing a workpiece is arranged on one side of the second sliding member (32) away from the first sliding member (31), and the first sliding member (31), the second sliding member (32) and the turnover member (33) complete a turnover action with a laser marking process according to a PLC control command.

9. Laser marking system according to claim 8, characterized in that the first slide (31) comprises a servo module (311) arranged transversely to the table, the piston of the servo module (311) being provided with a first connecting plate (312) fixedly connected to the second slide (32);

the second sliding piece (32) comprises a second air cylinder (321) longitudinally arranged on the first connecting plate (312), and a second connecting plate (322) is arranged at the tail end of a piston rod of the second air cylinder (321);

the turnover part (33) comprises at least one rotary cylinder (331) arranged on the second connecting plate (322), a clamp (332) used for clamping a workpiece is arranged on an output shaft of the rotary cylinder (331), and a pressing mechanism (333) used for pressing the workpiece is arranged right above the clamp (332).

10. Laser marking system according to claim 9, characterized in that the pressing mechanism (333) comprises a third cylinder (3332) arranged on the second connecting plate (322) via a third connecting plate (3331), the end of the piston rod of the third cylinder (3332) being provided with a pressure rod (3333).

Technical Field

The invention relates to the technical field of laser marking equipment, in particular to a laser marking system.

Background

Laser marking technology is one of the largest application areas of laser processing. Laser marking is a marking method in which a workpiece is irradiated locally with high-energy-density laser to vaporize a surface layer material or to undergo a chemical reaction of color change, thereby leaving a permanent mark. The laser marking can print various characters, symbols, images and the like;

when the laser marking image, there is the condition of marking the image and forming by a plurality of discrete figures, for example two-dimensional code, prior art is when carrying out this type of image marking, generally adopts the mode of switch laser many times to beat mark, beat mark completion back to a figure in the image promptly, need close laser, fix a position to next figure, open laser again and beat the mark operation to analogize and accomplish to beat the mark up to all figures, this kind of switch laser repeatedly, the marking mode greatly reduced of repeated location beats the mark speed, has reduced machining efficiency.

Disclosure of Invention

Therefore, the technical problem to be solved by the invention is to overcome the defects that the marking speed is greatly reduced and the processing efficiency is reduced by repeatedly switching on and off the laser and repeatedly positioning the marking mode in the prior art, thereby providing a laser marking system.

The technical purpose of the invention is realized by the following technical scheme:

a laser marking system, comprising:

the conveying belt is arranged on the workbench and used for continuously conveying the workpieces;

the laser is arranged on the workbench and used for carrying out laser marking on the workpiece;

the rotating mechanism is arranged on the workbench and is used for rotating the workpiece;

the turnover mechanism is arranged on the workbench and used for turning over the workpiece;

and the detection mechanism is arranged on the workbench and used for reading the marking patterns on the workpiece.

Optionally, the laser is electrically connected to a control end, the control end includes:

the marking device comprises an acquisition unit, a marking unit and a marking unit, wherein the acquisition unit is used for acquiring a marking image which comprises a plurality of discrete marking graphs;

the processing unit is used for dividing the marking patterns into regions, dividing each discrete marking pattern into at least one marking region, correspondingly distributing the marking regions in the at least one region, constructing marking paths in the marking regions in each region, and constructing a routing line in a non-marking region in each region;

and the control unit is used for setting the laser parameters of the laser operation and sequentially carrying out laser marking on each area according to the marking path and the walking line.

Optionally, the laser is an infrared fiber laser.

Optionally, the laser parameters include pulse width, repetition rate, marking speed, and packing density.

Optionally, the rotating mechanism comprises a lifting piece arranged on the workbench, a rotating piece is arranged at the bottom of the lifting piece, a clamping mechanism for taking and placing the workpiece is arranged on one side, far away from the lifting piece, of the rotating piece, and the lifting piece, the rotating piece and the clamping mechanism are matched with the laser marking process according to a PLC control instruction to complete rotating action.

Optionally, the lifting member includes a first cylinder, a transmission plate fixedly connected to the rotating member is disposed at a piston rod end of the first cylinder, a plurality of lifting guide rods are symmetrically disposed around the transmission plate, and the lifting guide rods are inserted and fixed between the transmission plate and the workbench;

the rotating part comprises a rotating cylinder arranged on the transmission plate, and a transmission block is arranged at the tail end of an output shaft of the rotating cylinder.

Optionally, the clamping mechanism comprises a first clamping jaw and a second clamping jaw which are arranged on the transmission block, and the first clamping jaw is fixedly connected with the second clamping jaw through a clamping jaw cylinder.

Optionally, the turnover mechanism includes a first slider arranged on the workbench and capable of moving in the horizontal direction, a second slider arranged on the first slider and capable of moving in the vertical direction, a turnover part for taking and placing the workpiece is arranged on one side of the second slider, which is far away from the first slider, and the first slider, the second slider and the turnover part complete turnover actions according to a PLC control instruction and a laser marking process.

Optionally, the first sliding part comprises a servo module transversely arranged on the workbench, and a piston of the servo module is provided with a first connecting plate fixedly connected with the second sliding part;

the second sliding part comprises a second air cylinder longitudinally arranged on the first connecting plate, and a second connecting plate is arranged at the tail end of a piston rod of the second air cylinder;

the turnover part comprises at least one rotary cylinder arranged on the second connecting plate, a clamp used for clamping a workpiece is arranged on an output shaft of the rotary cylinder, and a pressing mechanism used for pressing the workpiece is arranged right above the clamp.

Optionally, the pressing mechanism includes a third cylinder disposed on the second connecting plate through a third connecting plate, and a pressing rod is disposed at a tail end of a piston rod of the third cylinder.

According to the laser marking method and the laser marking machine provided by the technical scheme, the marking image composed of the discrete marking images is partitioned, the discrete marking images are divided into at least one marking area and are distributed in different areas, the non-marking area in each area is provided with the walking bit line, and the walking bit line can connect all the marking areas, so that the discrete marking images in each area are changed into continuous marking images, the times of switching on and off light are reduced, the problem of switching on and off the laser for multiple times in the marking process is solved, and the marking speed and the marking efficiency are improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, 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 one embodiment of the present invention;

FIG. 2 is a schematic diagram of a turntable in a laser marking system according to an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a turnover mechanism in a laser marking system according to an embodiment of the present invention;

FIG. 4 is a schematic structural diagram of a detection mechanism in a laser marking system according to an embodiment of the present invention;

fig. 5 is a schematic diagram of module connections of a laser marking system according to an embodiment of the present invention.

Description of reference numerals:

01. a conveyor belt; 1. a laser; 2. a swing mechanism; 21. a lifting member; 211. a first cylinder; 212. a drive plate; 213. a lifting guide rod; 22. a rotating member; 221. a rotary cylinder; 222. a transmission block; 23. a clamping mechanism; 231. a first jaw; 232. a second jaw; 233. a clamping jaw cylinder; 3. a turnover mechanism; 31. a first slider; 311. a servo module; 312. a first connecting plate; 32. a second slider; 321. a second cylinder; 322. a second connecting plate; 33. a turnover piece; 331. a rotating cylinder; 332. a clamp; 333. a hold-down mechanism; 3331. a third connecting plate; 3332. a third cylinder; 3333. a pressure lever; 4. a detection mechanism; 41. a CCD camera; 5. a control end; 51. a collection unit; 52. a processing unit; 53. a control unit.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

A laser marking system refers to the figures 1-5 and comprises a conveyor belt 01, a laser 1, a rotary mechanism 2, a turnover mechanism 3 and a detection mechanism 4, wherein the conveyor belt 01 is arranged on a workbench and used for conveying workpieces uninterruptedly, the laser 1 is used for carrying out laser marking on the workpieces, the rotary mechanism 2 is used for carrying out rotary action on the workpieces, the turnover mechanism 3 is used for carrying out rotary action on the workpieces, and the detection mechanism 4 is used for reading marking patterns on the workpieces.

As shown in fig. 5, the laser 1 is electrically connected to a control end 5, the control end 5 includes an acquisition unit 51, a processing unit 52 and a control unit 53, wherein the acquisition unit 51 is configured to acquire a marking image, the marking image includes a plurality of discrete marking images, and in this embodiment of the present invention, the discrete marking images in the marking image acquired by the acquisition unit 51 are irregular images; the processing unit 52 is configured to perform region division on the marking patterns, divide each discrete marking pattern into at least one marking region, correspondingly distribute the marking regions in the at least one region, construct a marking path in each marking region, and construct a routing line in a non-marking region in each region; in particular, for the marking image composed of irregular discrete marking patterns, when the processing unit 52 divides more regions and the width of the regions is smaller, each region tends to be a combined image formed by alternately marking regions and non-marking regions, so that the processing unit 52 can divide the marking image composed of irregular discrete marking patterns into a series of regular division images to simplify the planning process of the laser marking path and improve the marking efficiency to a certain extent. The control unit 53 is configured to control the laser 1 to output laser and sequentially mark each region with the laser according to the marking path and the line.

According to the foregoing, when the processing unit 52 divides more regions and the width of the region is smaller, each region tends to form a combined image by alternately marking regions and non-marking regions, so that the processing unit 52 adds a line to the non-marking regions, two ends of the line are respectively connected to two adjacent marking regions, a plurality of marking regions spaced in all the regions are connected to form a continuous pattern, and the line may be a straight line or an arc line; the regions are also connected with each other through the position line, when the control unit 53 controls the laser to mark in one region, the laser can directly enter the adjacent region which is not marked to mark, so that the marking regions in all the regions are connected into a continuous pattern.

As an alternative to the embodiment, the processing unit 52 may divide the region of the marking image by any one of the following methods:

dividing the marking image into a plurality of strip-shaped areas by adopting a straight line dividing mode, such as transverse dividing, longitudinal dividing or oblique dividing;

and in a second mode, an arc dividing mode is adopted to divide the marking image into a plurality of annular regions or arc regions.

In other solutions of this embodiment, the processing unit 52 may select a suitable dividing manner according to an actual situation of the marking image, and optionally, the processing unit 52 performs area division on the marking image by using a combined dividing manner according to the actual situation.

In this embodiment, the processing unit 52 is specifically configured to use the boundary of the region as a routing line, where the routing line points from one marking region to another marking region adjacent to the same region or to an adjacent region, all routing lines in the same region have the same direction, and for different regions, the routing line directions may be different; preferably, the processing unit 52 is configured with at least one routing line in the non-marked region in each region, the at least one routing line each pointing from one marked region to another adjacent marked region or to an adjacent region in the same region.

In this embodiment, when the processing unit 52 constructs the marking path of the marking region in each region, the marking path is constructed as an arcuate marking path, the start point and the end point of the arcuate marking path respectively correspond to the end point and the start point of the routing line in the non-marking region, and when a plurality of routing lines are constructed in the non-marking region in each region, the end point of the arcuate marking path corresponds to the start point of one of the routing lines.

Alternatively, the processing unit 52 may also construct the travel-line in other manners, such as a diagonal line, an inscribed circle, and the like.

According to the laser marking machine provided by the embodiment of the invention, the processing unit 52 is used for partitioning the marking image consisting of the discrete marking images, the discrete marking images are divided into at least one marking area and are distributed in different areas, the processing unit 52 is used for constructing the routing bit lines in the non-marking area in each area, and the routing bit lines can connect all the marking areas, so that the discrete marking images are changed into continuous marking images, the problem of switching on and off the laser for many times in the marking process is solved, the repeated positioning of the marking images is not needed, and the marking speed and the processing efficiency are improved.

Specifically, the laser 1 is used for providing a laser light source and emitting laser light to the surface of a workpiece, the laser 1 according to the embodiment of the present invention includes, but is not limited to, an infrared fiber laser, and the laser light emitted by the laser 1 is pulse laser light.

The control module 53 is electrically connected to the laser 1 and configured to set laser parameters of the laser 1, and the control module 53 has control software therein and automatically sets the laser parameters after receiving a control command input by a user.

In the embodiment of the present invention, the laser parameters include pulse width, repetition frequency, marking speed and filling density, wherein:

the pulse width refers to the duration of a single pulse of laser, and the shorter the pulse width of the laser is, the higher the peak power of the laser is, and the larger the destructive power of the laser is; conversely, the larger the pulse width, the longer the duration of the laser, and the lower the peak power, the pulse width set by the embodiment of the present invention is 200ns to 500 ns.

The repetition frequency refers to the number of pulses emitted by the laser 1 per second, and in unit time, the higher the repetition frequency, the smaller the energy of a single pulse, and the smaller the destructive power of the laser, and correspondingly, the lower the repetition frequency, the larger the energy of a single pulse, and the larger the destructive power of the laser, and the repetition frequency set by the embodiment of the invention is 600kHz to 1000 kHz.

In the embodiment of the invention, the faster the marking speed is, the shorter the laser pulse retention time is, the faster the heat dissipation is, and conversely, the slower the marking speed is, the longer the laser retention action time is, the heat accumulation is not easy to dissipate, namely, the marking speed influences the working time of the laser, and the marking speed set in the embodiment of the invention is not more than 100 mm/s.

The laser marking is a line scanning mode, namely, a plurality of lines are overlapped in the same direction according to a certain distance, so that the effect of marking by laser covering is achieved, the filling density needs to be set to be a proper value, the processing efficiency is influenced when the filling density is too large, the marking effect is influenced by omission when the filling density is too small, and in order to ensure the overlapping rate of the filling lines, the filling density set by the embodiment of the invention is less than 0.02 mm.

In the embodiment of the invention, when the pulse width is set to be 500ns, the repetition frequency is set to be 1MHz, the marking speed is set to be 100mm/s, and the filling density is set to be 0.03mm, a better marking effect can be obtained; in other embodiments of the present invention, the pulse width, the repetition frequency, the marking speed, and the filling density may be set to other values according to actual requirements, which is not limited by the embodiments of the present invention.

As shown in fig. 2, the rotating mechanism 2 includes a lifting member 21 disposed on the worktable, a rotating member 22 disposed at the bottom of the lifting member 21, and a clamping mechanism 23 disposed at a side of the rotating member 22 away from the lifting member 21 for picking and placing the workpiece, so that the lifting member 21, the rotating member 22, and the clamping mechanism 23 cooperate with the laser marking process according to the PLC control command to complete the rotating action. Firstly, the lifting piece 21 is placed, the workpiece is grabbed by the clamping mechanism 23, the rotation action is realized through the rotating piece 22 after the lifting, and then the workpiece is placed and the clamping mechanism 23 is loosened after the requirement of the rotation angle of the workpiece is met.

As shown in fig. 2, the lifting member 21 includes a first cylinder 211, a driving plate 212 fixedly connected to the rotating member 22 is disposed at a distal end of a piston rod of the first cylinder 211, a plurality of lifting guide rods 213 are symmetrically disposed around the driving plate 212, and the lifting guide rods 213 are inserted and fixed between the driving plate 212 and the worktable. When the work piece need rotate certain angle so that laser beat the standard promptly, send control command by PLC, drive driving plate 212 through controlling first cylinder 211 and remove along vertical direction to drive fixture 23, in addition, lift guide 213 can play the guide effect, realizes the accurate regulation on the vertical plane.

As shown in fig. 2, the rotating member 22 includes a rotating cylinder 221 disposed on the transmission plate 212, and a transmission block 222 is disposed at an output shaft end of the rotating cylinder 221, so that the PLC sends a control command to drive the transmission block 222 to rotate by controlling the rotating cylinder 221, thereby driving the clamping mechanism 23. After the carrier is in place, the lifting piece 21 descends, the clamping mechanism 23 clamps the carrier, the lifting piece 21 ascends, the rotating piece 22 rotates 180 degrees, the lifting piece 21 descends, the clamping mechanism 23 releases the carrier, the lifting piece 21 ascends, the rotating piece 22 rotates 180 degrees, next circulation is waited, and the whole action flow is controlled by the PLC.

As shown in fig. 2, the clamping mechanism 23 includes a first clamping jaw 231 and a second clamping jaw 232 disposed on the transmission block 222, and the first clamping jaw 231 and the second clamping jaw 232 are fixedly connected by a clamping jaw cylinder 233, so that the second clamping jaw 232 slides toward the first clamping jaw 231 to clamp the workpiece.

As shown in fig. 3, the turnover mechanism 3 includes a first sliding member 31 disposed on the workbench and capable of moving in the horizontal direction, a second sliding member 32 disposed on the first sliding member 31 and capable of moving in the vertical direction, and a turnover member 33 for picking and placing the workpiece is disposed on one side of the second sliding member 32 away from the first sliding member 31, so that the first sliding member 31, the second sliding member 32 and the turnover member 33 complete a turnover operation according to the PLC control instruction and the laser marking process. Firstly, according to the position of a workpiece on a conveyor belt, the workpiece is adjusted through the first sliding part 31 and the second sliding part 32, the workpiece is grabbed and overturned by the overturning part 33, and after the requirement of the laser marking angle of the workpiece is met, the workpiece is placed downwards and loosened.

As shown in fig. 3, the first sliding member 31 includes a servo module 311 transversely disposed on the worktable, a first connecting plate 312 fixedly connected to the second sliding member 32 is disposed on a piston of the servo module 311, and guide rails for guiding and bearing are disposed on two sides of the servo module 311. In addition, the second sliding member 32 includes a second cylinder 321 longitudinally disposed on the first connecting plate 312, a second connecting plate 322 is disposed at the end of the piston rod of the second cylinder 321, and guide rails for guiding and bearing are disposed on two sides of the second cylinder 321. When the work piece need overturn so that the laser is beaten the standard promptly, send control command by PLC, drive first connecting plate 312 horizontal migration through control servo module 311, control second cylinder 321 again and drive second connecting plate 322 longitudinal movement to it can pinpoint the work piece and snatch to drive upset piece 33.

As shown in fig. 3, the turning member 33 includes at least one rotating cylinder 331 disposed on the second connecting plate 322, a clamp 332 for clamping a workpiece is disposed on an output shaft of the rotating cylinder 331, and a pressing mechanism 333 for pressing the workpiece is disposed directly above the clamp 332, so that the PLC sends a control command, the workpiece is embedded and grabbed by the clamp 332, then the rotating cylinder 331 is controlled to turn the workpiece, and finally the workpiece is pressed by the pressing mechanism 333. When the machine is started to select a product model, the servo module 311 adjusts the position to ensure that the center of the clamping jaw is overlapped with the center of the product, and then the clamping jaw does not act in the subsequent production process.

As shown in fig. 3, the pressing mechanism 333 includes a third cylinder 3332 provided on the second connecting plate 322 via a third connecting plate 3331, and a pressing rod 3333 for ejecting the workpiece from the jig 332 is provided at a distal end of a piston rod of the third cylinder 3332. Therefore, after the workpiece is turned over, the PLC transmits a control command to control the third cylinder 3332 to operate, and the press rod 3333 ejects the workpiece from the jig 332.

As shown in fig. 4, the detection mechanism 4 includes a displacement mechanism (servo module) and a CCD camera 41 having the same structure as the first slider 31 and the second slider 32, and similarly, the position of the CCD camera 41 is adjusted by the displacement mechanism according to the position of the workpiece on the conveyor belt, and the focal length of the camera is determined to read the marking pattern on the workpiece, thereby determining the marking effect.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.