CN114515795B - Laser auxiliary correction method and device based on visual error compensation - Google Patents
Laser auxiliary correction method and device based on visual error compensation Download PDFInfo
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- CN114515795B CN114515795B CN202210106335.6A CN202210106335A CN114515795B CN 114515795 B CN114515795 B CN 114515795B CN 202210106335 A CN202210106335 A CN 202210106335A CN 114515795 B CN114515795 B CN 114515795B
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- 239000000463 material Substances 0.000 claims abstract description 89
- 238000005259 measurement Methods 0.000 claims abstract description 37
- 238000012545 processing Methods 0.000 claims abstract description 33
- 238000001514 detection method Methods 0.000 claims abstract description 31
- 230000008054 signal transmission Effects 0.000 claims abstract description 8
- 230000008569 process Effects 0.000 claims description 43
- 239000002184 metal Substances 0.000 claims description 25
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- 238000002310 reflectometry Methods 0.000 claims description 5
- 239000007769 metal material Substances 0.000 abstract description 7
- 238000010924 continuous production Methods 0.000 abstract description 3
- 238000004080 punching Methods 0.000 description 11
- 238000003754 machining Methods 0.000 description 9
- 238000004519 manufacturing process Methods 0.000 description 7
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- 230000005855 radiation Effects 0.000 description 6
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- 238000004458 analytical method Methods 0.000 description 4
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- 238000005516 engineering process Methods 0.000 description 4
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- 230000007613 environmental effect Effects 0.000 description 3
- 238000004093 laser heating Methods 0.000 description 3
- 238000003801 milling Methods 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 3
- 238000005498 polishing Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 2
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D43/00—Feeding, positioning or storing devices combined with, or arranged in, or specially adapted for use in connection with, apparatus for working or processing sheet metal, metal tubes or metal profiles; Associations therewith of cutting devices
- B21D43/003—Positioning devices
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C51/00—Measuring, gauging, indicating, counting, or marking devices specially adapted for use in the production or manipulation of material in accordance with subclasses B21B - B21F
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q17/00—Arrangements for observing, indicating or measuring on machine tools
- B23Q17/22—Arrangements for observing, indicating or measuring on machine tools for indicating or measuring existing or desired position of tool or work
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q17/00—Arrangements for observing, indicating or measuring on machine tools
- B23Q17/24—Arrangements for observing, indicating or measuring on machine tools using optics or electromagnetic waves
- B23Q17/2414—Arrangements for observing, indicating or measuring on machine tools using optics or electromagnetic waves for indicating desired positions guiding the positioning of tools or workpieces
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q17/00—Arrangements for observing, indicating or measuring on machine tools
- B23Q17/24—Arrangements for observing, indicating or measuring on machine tools using optics or electromagnetic waves
- B23Q17/2428—Arrangements for observing, indicating or measuring on machine tools using optics or electromagnetic waves for measuring existing positions of tools or workpieces
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Abstract
The invention discloses a laser auxiliary correction device based on visual error compensation, which comprises a laser module, a visual detection module, a signal transmission module and a central processing module. The laser module is used for emitting laser beams and radiating laser tracks on the surface of the material to be processed; the visual detection module is used for detecting laser track position data, visual measurement marking point position data and material boundary position data, and is arranged right above the material and coaxially installed with the laser module; the signal transmission module is used for transmitting the detected position data to the central processing module. The invention also discloses the laser auxiliary correction method. The device and the method can ensure continuous production and position correction without stopping, and improve the practical significance of laser assistance in metal material processing and application.
Description
Technical Field
The invention belongs to the field of metal forming, and particularly relates to a laser auxiliary correction method and device based on vision error compensation.
Background
Based on the rapid change of the market, the demands for high-performance and high-value-added parts are exponentially increased; weight reduction has become a major concern in various industrial fields. Thus, a number of novel metal working processes have been proposed and studied. The heat-assisted forming is used as one of the core technologies, adopts a plurality of modes for processing, and adopts laser-assisted forming technology with laser as an energy source, which has the advantages of quick response, accurate forming, low equipment modification degree and the like, ensures that manufactured parts can have good mechanical properties and surface finish, reduces material consumption and hardware upgrading cost in the manufacturing process, and does not influence productivity at all, and the advantages are difficult to achieve by a plurality of traditional processes and additional processes.
However, in the laser-assisted forming process, there is a disadvantage that it is difficult to overcome, namely, the problem of the cooperative work of the laser, the metal material and the machining system in a complex machining environment. Taking a metal stamping process as an example, a huge impact force causes displacement of a material, which can cause that the laser profile of pre-heating radiation is difficult to perfectly process, so that deviation, part surface defects, quality reduction and even the effect of laser assistance are completely disappeared, and the problem can greatly influence the practicability of the laser-assisted forming process.
Currently, to solve the above problems, only extremely passive part-based analytical compensation processes can be employed: after the production of the parts is finished, the finished parts are used as the standard to judge the deviation of the laser heating trace and the actual processing trace on the parts, and then the laser/material position is manually adjusted, so that the process is extremely low in efficiency and poor in effect, and the reason is as follows:
1. the metal forming process is a continuous process, so that the hysteresis of the actually obtained part is overlarge, and 4-8 stations or more are consumed on average, so that huge labor hour waste is caused;
2. the continuous process results in that before the reference part is obtained, the quality of all subsequent parts can not be ensured, and raw materials are wasted greatly;
3. errors in the material and the processing process are accumulated and overlapped, and the existing reference part cannot represent the current material state, so that the correction significance is not great;
4. repeated shutdown correction for many times consumes a large amount of production time, improves the manufacturing cost and has no practical significance.
In summary, how to solve or monitor the position state of the material in real time is the basis of the laser assisted forming process, if the core problem is not solved, the economic benefit and the good performance effect of the laser assisted forming will be greatly reduced.
Disclosure of Invention
Aiming at the problem of material deviation caused by vibration, equipment interference and environmental influence in the laser auxiliary forming process in the metal processing field at present, the invention provides a laser auxiliary correction method and device based on visual error compensation.
The laser auxiliary process is laser heating, marking, etching, polishing and the like, and needs a certain laser auxiliary forming process performed on a specific position of the material; the method can also be a certain pretreatment process, namely a subsequent metal processing process such as stamping, drawing, milling and the like. The metal forming method includes all metal processing modes such as metal stretching, complete machining, polishing, milling and the like which adopt laser assistance as a preamble process besides a metal stamping mode. The forming equipment can be metal forming equipment such as various punching machines, machine tools, CNC and the like. The invention has the core work of cooperating with the laser and metal processing process and is suitable for various processing technologies.
The invention provides a laser auxiliary correction device based on visual error compensation, which comprises a laser module, a visual detection module, a signal transmission module and a central processing module, wherein the laser module is used for emitting laser beams and radiating laser tracks on the surface of a material to be processed;
the visual detection module is used for detecting laser track position data, visual measurement mark point position data and material boundary position data; the signal transmission module is used for transmitting the detected position data to the central processing module;
and the central processing module is used for calculating the material offset angle and the XY axis offset under the reference system according to the laser track position data, the vision measurement mark point position data and the material boundary position data, the reference system is established by taking the parallel sides of the vision measurement mark points as references, and the compensation calculation is carried out according to the offset angle and the XY axis offset to obtain the rotation angle and the distance of the laser track which should cooperatively move along with the material position, the laser module is adjusted, so that the laser is radiated to the compensated position, the laser track corrected for the material is generated, or the alarm is given when the offset angle and/or the XY axis offset exceeds a threshold value.
In the embodiment of the invention, a visual measurement mark point is respectively stuck to the upper and lower directions of a station of a visual detection area, and the visual measurement mark point has different colors and reflectivities from materials.
The adjusting laser module comprises adjusting the angle of the vibrating mirror and the reflecting structure.
The visual detection module includes an optical camera and may emit detection light. The visual detection module may be disposed directly over the material. The visual detection module may be mounted coaxially with the laser module.
The laser module further comprises a laser protection device.
The central processing module may also perform a predetermined action including a shutdown while alerting when the offset angle and/or the XY axis offset exceeds a threshold.
The specific calculation process for calculating the material offset angle and the XY axis offset under the reference system according to the laser track position data, the vision measurement marking point position data and the material boundary position data comprises the following steps: and (3) using the parallel edges of the visual measurement mark points as references to obtain the offset angle of the material, calculating the offset about the Y axis by using the position of the laser track, and calculating the X axis offset again by using the Y axis offset and the corresponding angle.
The invention also provides a laser auxiliary correction method for visual error compensation, which comprises the following steps:
step 1, respectively attaching a visual measurement marking point at a station of a visual detection area;
step 2, the laser module emits laser beams, and the laser tracks are radiated on the surface of the material to be processed;
step 3, the vision detection module detects laser track position data, material boundary position data and vision measurement mark point position data;
step 4, calculating to obtain XY axis offset and angle offset data of the material according to the laser track position data, the material boundary position data and the vision measurement mark point position data by taking the parallel edges of the vision measurement mark points as a reference system, and carrying out corresponding compensation calculation to obtain rotation angle and distance data of the laser track which is supposed to cooperatively move along with the material position;
and step 5, adjusting the laser module according to the rotation angle and distance data obtained by compensation calculation, so that laser is radiated to the compensated position, and generating a laser track corrected by aiming at the material, or alarming when the XY axis offset and/or the angle offset data exceeds a threshold value.
And repeatedly completing the steps, and finishing fine adjustment of the laser radiation position before each metal machining so as to achieve the perfect machining effect.
Furthermore, the method can be applied to metal stamping processing, the visual measurement mark points have different colors and reflectivities from materials, and the step 5 of adjusting the laser module comprises adjusting the angles of the vibrating mirror and the reflecting structure.
Further, the visual detection module is arranged right above the material and is coaxially installed with the laser module, and the laser module comprises a laser protection device.
Further, when the angle offset data and/or the XY axis offset exceeds a threshold value, an alarm is given, and meanwhile, the machine is stopped.
Further, the specific calculation process of the material angle offset data and the XY axis offset in the step 4 is as follows: and (3) using the parallel edges of the visual measurement mark points as references to obtain the offset angle of the material, calculating the offset about the Y axis by using the position of the laser track, and calculating the X axis offset again by using the Y axis offset and the corresponding angle.
The laser auxiliary correction method and the device based on visual error compensation provided by the invention can be applied to metal stamping processing, and the core part of the device is a visual detection module, a signal transmission module, a central processing module and the like; the device is arranged in a laser auxiliary area and is used for monitoring the displacement condition of a material in real time, performing corresponding analysis and compensation calculation, transmitting a signal to a laser emission system, and enabling the laser to adjust the corresponding angle and position so as to be matched with the existing metal material position. Finally, the metal forming equipment processes the raw materials with the laser radiation positions adjusted, and forms corresponding parts more accurately.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the disclosure and together with the description, serve to explain the principles of the disclosure.
FIG. 1 is a schematic diagram of a laser-assisted correction method and apparatus based on visual error compensation according to the present invention;
FIG. 2 is a schematic diagram of laser irradiation positional deviation occurring based on material displacement;
fig. 3 is a schematic diagram of a vision capturing and correcting process.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
The laser auxiliary process is laser heating, marking, etching, polishing and the like, and needs a certain laser auxiliary forming process performed on a specific position of the material; the method can also be a certain pretreatment process, namely a subsequent metal processing process such as stamping, drawing, milling and the like; the forming equipment can be metal forming equipment such as various punching machines, machine tools, CNC and the like.
The invention provides a laser auxiliary correction method and device based on visual error compensation, and the device and method are used for solving the problem of material deviation caused by vibration, equipment interference and environmental influence aiming at the laser auxiliary forming process in the current metal processing field. The device and the method can be applied to a plurality of fields, because different machining and metal material forming modes all need a positioning correction method to improve the productivity and the quality, and the device and the method can be applied in general. In order to clearly show the whole process, the invention adopts a metal stamping process as a case to carry out process explanation.
Fig. 1 shows a punching structure with a visual detection module, and a corresponding die and a laser device, and the whole system is not shown in fig. 1 because only the visual detection module is required to be installed in a working area, and other modules such as a signal transmission module and a central processing module can transmit signals through cables, so that the punching structure is installed in a space far away from mechanical equipment. The visual detection module is an optical camera or other similar functional systems and can quickly capture a structural target object with a preset value; the visual detection module is small in volume, is arranged right above the metal material, can be coaxially installed with the laser head, and ensures a close distance in space; the system is provided with a laser protection device and a built-in light source, so that the visual capturing process is more convenient to carry out; the vision measurement mark points are suitable reflection materials for optical detection, can stably reflect light, and provide input data for a vision system.
As shown in fig. 1, an upper die, a lower die, an upper die 7 and a lower die 8 are installed in a punch 1, metal forming work is performed, and the punch 1 is provided with a laser auxiliary processing station in a feeding direction, in which a laser module 2 is provided. Meanwhile, the visual detection module 3 is arranged near the laser module 2 in the core working part of the invention, so that the visual detection module 3 is as close to the laser auxiliary radiation area as possible for better obtaining visual contents. In the later work, the laser module 2 emits a laser beam 4 according to an auxiliary instruction to radiate on the material 5 to complete a designed laser track, and then the material moves under the drive of the feeder 6 to enter a punching machine processing area; the upper die 7 moves downward, and punches through the area irradiated with the laser, and at this time, whether the punching position and the laser position are performed in accordance with a preset relationship is a key point of the entire forming process.
FIG. 2 is a schematic diagram of laser irradiation positional deviation occurring based on material displacement; the graph shows a top view of the material, and the graph adopts 3 steps, which sequentially illustrate the process relation that the material is offset and the machining error is caused.
As shown in fig. 2.1 of fig. 2, the laser machined area is represented by square dashed line frame 2.1.3, and the metal forming area is represented by square dashed line frame 2.1.4. The laser scans the desired geometric profile 2.1.2 (circular example is used in the present invention) over the material surface according to the system presets. The material is then moved by the feeder and, in a fully ideal situation, is transported straight, unbiased to the corresponding position of the stamping punch shown in 2.1.5.
In an ideal case, the material is positioned as shown in fig. 2.2 of fig. 2, and the two circular tracks have corresponding positions on the material to be processed, which are standard concentric geometries.
However, under the actual processing condition, due to the equipment problems of a large amount of engineering, such as old punching machines, inaccurate feeding machines, large environmental vibration, friction in transportation and the like, the whole material can show irregular fine azimuth fluctuation under the driving of a feeder, and the azimuth fluctuation cannot show obvious influence if in the traditional processing technology; however, in the process of laser assisted and other multi-process coordination, deviations such as non-uniform front and back processes may be caused, as shown in fig. 2.3 of fig. 2: it can be seen that when the metal moves slightly (for convenience of description, assuming that the material rotates by 1 °), the original track 2.1.2 of the laser has been greatly deviated from the circle 2.1.5 of the stamping track, and the laser track will not provide functional assistance for the original product manufacturing at all, but instead, the useless laser trace remains on the product, and the product value will be reduced.
Fig. 3 shows how the system monitors and corrects in real time: fig. 3.1 shows the same situation as in fig. 2.3, assuming that this is the first time the laser track 3.1.6 enters the punching zone, the laser track 3.1.6 has already deviated from the punching position 3.1.7. At this time, the visual inspection module starts to work in the visual inspection area 3.1.2 (represented by a circular wire frame), the visual inspection module emits and inspects red light (or other monochromatic light sources suitable for inspection), the light is received after reflecting the laser trace, and the punching press, the die and the visual inspection module are rigidly mounted, so that the position of the upper die cannot be changed, and the visual inspection module can simulate the punching position at this time.
In the visual detection area, two visual measurement mark points 3.1.3 with strong reflection effect are attached. Because the metal material has smooth surface and is easy to cause light reflection, the material position is difficult to accurately and directly identify. Therefore, the system adopts a brand new design concept, adopts visual identification mark points, and applies lines formed by the edges of materials and the external space to perform visual identification and analysis, so that the identification efficiency and accuracy can be greatly improved.
Fig. 3.2 illustrates the identification process, when the visual inspection module identifies two boundaries of the displaced material, two visually measured marking points 3.1.3 in the system are again identified. When the position data of the four elements are all read, the data can be transmitted to a central processing module for analysis. In the analysis process, the parallel edges of the visual measurement mark points are used as references, the offset angle of the material can be obtained to be 3.2.3, the offset L1/L2 about the Y axis can be calculated by using the position of the laser track as data of 3.2.1 and 3.2.2, and the X axis offset can be calculated again by the Y axis offset and the corresponding angle. Therefore, the material offset under the station can completely and accurately obtain the material position data.
Then, as shown in fig. 3.3, the data is fed back to the laser system, the laser system adjusts the angles of the galvanometer and the reflecting structure, and new laser scanning can be instantaneously performed at the brand-new offset correction position 3.3.1 to generate a laser track simulation position corresponding to the material correction, and the new position 3.3.2 is not kept at the original material position, but can be concentrically matched with the stamping track 3.1.7, so that the production error is greatly reduced. In addition, the system can also be provided with an excessive error alarm function, if the measurement finds that the error is excessive, the system can directly alarm and stop according to a preset instruction, and the like, because the excessive error can mean errors in die design or the ageing loss of a feeder, and the normal acceptable range is exceeded.
In an exemplary embodiment, a laser-assisted correction method for visual error compensation includes the steps of:
step 1, respectively attaching a visual measurement marking point at a station of a visual detection area;
step 2, emitting laser beams, and radiating laser tracks on the surface of the material to be processed;
step 3, the vision detection module detects laser track position data, material boundary position data and vision measurement mark point position data;
step 4, calculating to obtain XY axis offset and angle offset data of the material according to the laser track position data, the material boundary position data and the vision measurement mark point position data by taking the parallel edges of the vision measurement mark points as a reference system, and carrying out corresponding compensation calculation to obtain rotation angle and distance data of the laser track which is supposed to cooperatively move along with the material position;
and step 5, adjusting the laser module according to the rotation angle and distance data obtained by compensation calculation, so that laser is radiated to the compensated position, and generating a laser track corrected by aiming at the material, or alarming when the XY axis offset and/or the angle offset data exceeds a threshold value.
And repeatedly completing the steps, and finishing fine adjustment of the laser radiation position before each metal machining so as to achieve the perfect machining effect.
Furthermore, the method can be applied to metal stamping processing, the visual measurement mark points have different colors and reflectivities from materials, and the step 5 of adjusting the laser module comprises adjusting the angles of the vibrating mirror and the reflecting structure.
Further, the visual detection module is arranged right above the material and is coaxially installed with the laser module, and the laser module comprises a laser protection device.
Further, when the angle offset data and/or the XY axis offset exceeds a threshold value, an alarm is given, and meanwhile, the machine is stopped.
Further, the specific calculation process of the material angle offset data and the XY axis offset in the step 4 is as follows: and (3) using the parallel edges of the visual measurement mark points as references to obtain the offset angle of the material, calculating the offset about the Y axis by using the position of the laser track, and calculating the X axis offset again by using the Y axis offset and the corresponding angle.
Therefore, on the premise of no shutdown, the laser auxiliary correction method and the device based on visual error compensation can ensure that the whole process can continuously carry out production and position correction, fine adjustment can be carried out on the basis of a brand new material position in each laser radiation, the whole process directly eliminates the superposition movement of materials, and meanwhile, the manual correction after the stamping is finished is not required, and the method and the device improve the practical significance of laser auxiliary in the metal material processing and application.
The above-described embodiments are merely preferred embodiments for fully explaining the present invention, and the scope of the present invention is not limited thereto. Equivalent substitutions and modifications will occur to those skilled in the art based on the present invention, and are intended to be within the scope of the present invention. The protection scope of the invention is subject to the claims.
Claims (10)
1. A laser auxiliary correction device based on visual error compensation is characterized in that: the device comprises a laser module, a visual detection module, a signal transmission module and a central processing module, wherein,
the laser module is used for emitting laser beams and radiating laser tracks on the surface of the material to be processed;
the visual detection module is used for detecting laser track position data, visual measurement mark point position data and material boundary position data; the visual detection module is arranged right above the material and is coaxially arranged with the laser module;
the signal transmission module is used for transmitting the detected position data to the central processing module;
and the central processing module is used for calculating the material offset angle and the XY axis offset under the reference system according to the laser track position data, the vision measurement mark point position data and the material boundary position data, the reference system is established by taking the parallel sides of the vision measurement mark points as references, and the compensation calculation is carried out according to the offset angle and the XY axis offset to obtain the rotation angle and the distance of the laser track which should cooperatively move along with the material position, the laser module is adjusted, so that the laser is radiated to the compensated position, the laser track corrected for the material is generated, or the alarm is given when the offset angle and/or the XY axis offset exceeds a threshold value.
2. The laser assisted correction device based on visual error compensation of claim 1, wherein: and a visual measurement mark point is respectively stuck to the upper and lower directions of a station of the visual detection area, the visual measurement mark point has different colors and reflectivities from those of materials, and the laser adjusting module comprises an adjusting vibrating mirror and a reflecting structure angle.
3. The laser assisted correction device based on visual error compensation of claim 1, wherein: the laser module comprises a laser protection device.
4. The laser assisted correction device based on visual error compensation of claim 1, wherein: and the central processing module alarms when the offset angle and/or the XY axis offset exceeds a threshold value, and simultaneously stops.
5. The laser assisted correction device based on visual error compensation of claim 1, wherein: the specific calculation process for calculating the material offset angle and the XY axis offset under the reference system according to the laser track position data, the vision measurement marking point position data and the material boundary position data comprises the following steps: and (3) using the parallel edges of the visual measurement mark points as references to obtain the offset angle of the material, calculating the offset about the Y axis by using the position of the laser track, and calculating the X axis offset again by using the Y axis offset and the corresponding angle.
6. A method for laser-assisted correction based on visual error compensation, the method comprising the steps of:
step 1, respectively attaching a visual measurement marking point at a station of a visual detection area;
step 2, the laser module emits laser beams, and the laser tracks are radiated on the surface of the material to be processed;
step 3, a visual detection module detects laser track position data, material boundary position data and visual measurement mark point position data, wherein the visual detection module is arranged right above a material and is coaxially installed with the laser module;
step 4, calculating to obtain XY axis offset and angle offset data of the material according to the laser track position data, the material boundary position data and the vision measurement mark point position data by taking the parallel edges of the vision measurement mark points as a reference system, and carrying out corresponding compensation calculation to obtain rotation angle and distance data of the laser track which is supposed to cooperatively move along with the material position;
and step 5, adjusting the laser module according to the rotation angle and distance data obtained by compensation calculation, so that laser is radiated to the compensated position, and generating a laser track corrected by aiming at the material, or alarming when the XY axis offset and/or the angle offset data exceeds a threshold value.
7. The method for laser assisted correction based on visual error compensation of claim 6, wherein: the method can be applied to metal stamping processing, the visual measurement mark points have different colors and reflectivities from materials, and the adjusting of the laser module in the step 5 comprises adjusting angles of the vibrating mirror and the reflecting structure.
8. The method for laser assisted correction based on visual error compensation of claim 6, wherein: the laser module comprises a laser protection device.
9. The method for laser assisted correction based on visual error compensation of claim 6, wherein: and alarming when the angle offset data and/or the XY axis offset exceeds a threshold value, and stopping at the same time.
10. The method for laser assisted correction based on visual error compensation of claim 6, wherein: the specific calculation process of the material angle offset data and the XY axis offset in the step 4 is as follows: and (3) using the parallel edges of the visual measurement mark points as references to obtain the offset angle of the material, calculating the offset about the Y axis by using the position of the laser track, and calculating the X axis offset again by using the Y axis offset and the corresponding angle.
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| JP2010099674A (en) * | 2008-10-21 | 2010-05-06 | Mitsubishi Electric Corp | Laser beam machining apparatus |
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| CN108941894A (en) * | 2018-07-20 | 2018-12-07 | 富通尼激光科技（东莞）有限公司 | A kind of laser processing device and method |
| DE102018217940A1 (en) * | 2018-10-19 | 2020-04-23 | Trumpf Werkzeugmaschinen Gmbh + Co. Kg | Method and processing machine for processing a workpiece |
| CN111843219A (en) * | 2019-04-19 | 2020-10-30 | 大族激光科技产业集团股份有限公司 | Automatic error compensation method for laser optical path system and laser optical path system |
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2022
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010099674A (en) * | 2008-10-21 | 2010-05-06 | Mitsubishi Electric Corp | Laser beam machining apparatus |
| CN107378246A (en) * | 2016-05-16 | 2017-11-24 | 大族激光科技产业集团股份有限公司 | A kind of method and system for correcting laser welding track |
| CN108941894A (en) * | 2018-07-20 | 2018-12-07 | 富通尼激光科技（东莞）有限公司 | A kind of laser processing device and method |
| DE102018217940A1 (en) * | 2018-10-19 | 2020-04-23 | Trumpf Werkzeugmaschinen Gmbh + Co. Kg | Method and processing machine for processing a workpiece |
| CN111843219A (en) * | 2019-04-19 | 2020-10-30 | 大族激光科技产业集团股份有限公司 | Automatic error compensation method for laser optical path system and laser optical path system |
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