CN114347465A - Triaxial scanning galvanometer focus calibration platform and calibration method thereof - Google Patents
Triaxial scanning galvanometer focus calibration platform and calibration method thereof Download PDFInfo
- Publication number
- CN114347465A CN114347465A CN202111546536.XA CN202111546536A CN114347465A CN 114347465 A CN114347465 A CN 114347465A CN 202111546536 A CN202111546536 A CN 202111546536A CN 114347465 A CN114347465 A CN 114347465A
- Authority
- CN
- China
- Prior art keywords
- focus
- calibration
- focus calibration
- printing
- scanning galvanometer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Abstract
The invention discloses a three-axis scanning galvanometer focus calibration platform and a calibration method thereof; the three-axis scanning laser device comprises a focus calibration plate, printing paper pasted on the focus calibration plate, and a three-axis scanning galvanometer located right above the focus calibration plate, wherein the three-axis scanning galvanometer is connected with a fiber laser, the focus calibration plate is subjected to data measurement by a two-coordinate measuring instrument, the measured data is transmitted to a data processor, the data processor generates a calibration file and sends the calibration file to a galvanometer controller, and the galvanometer controller controls the three-axis scanning galvanometer to perform printing operation. In the process of calibrating the focus of the three-axis scanning galvanometer, the invention utilizes the width of the symmetrical parallel lines to carry out correction, thereby solving the problems that the difference between the central light spot and the edge light spot of large-format laser printing is large and the energy of the laser in the printing area is uneven due to the size of the light spot at present.
Description
Technical Field
The invention relates to the technical field of selective laser melting additive manufacturing, in particular to a three-axis scanning galvanometer focus calibration platform and a calibration method thereof.
Background
The selective laser melting additive manufacturing technology can manufacture various complex parts which are difficult to process in the traditional processing by using a layer-by-layer manufacturing method, and in order to meet the requirement of manufacturing large-size parts, the selective laser melting equipment adopts a three-axis scanning galvanometer to control a laser light path.
The existing galvanometer calibration mainly calibrates the size, and researches on galvanometer focus calibration are less, however, the influence of the focus on the printing quality is still larger, and the focus is not calibrated well, so that the printing quality is poor, and even the printing fails.
Disclosure of Invention
The present invention is directed to overcome the above-mentioned shortcomings and drawbacks of the prior art, and to provide a three-axis scanning galvanometer focus calibration platform and a calibration method thereof. The invention can be used for focus calibration, and can quickly calibrate the focus, so that the energy of each position of the printing breadth is uniform.
The invention is realized by the following technical scheme:
the utility model provides a 3 focuses calibration platforms of triaxial scanning galvanometer, including focus calibration board 1, paste printing paper 2 on focus calibration board 1, be located the triaxial scanning galvanometer 3 directly over focus calibration board 1, triaxial scanning galvanometer 3 is connected with fiber laser 4, focus calibration board 1 carries out data measurement by two coordinate measuring apparatu 5, measured data transmission gives data processor 6, data processor 6 generates calibration file for galvanometer controller 7, control triaxial scanning galvanometer 3 by galvanometer controller 7 and print the operation.
A calibration method for a three-axis scanning galvanometer 3 focus calibration platform comprises the following steps:
step 1: a focus calibration platform of a three-axis scanning galvanometer 3 is built;
step 2: calibrating the focus of each position of the printing area;
and step 3: the accuracy of the focus calibration file is verified.
In the step 2, the substep of calibrating the focus at each position of the printing area includes:
2-1: pasting printing paper 2 on the focus calibration plate 1, and adjusting the height of the focus calibration plate 1 to enable the focus calibration plate 1 to be located at a laser printing position;
2-2: enabling laser to print a series of symmetrical parallel lines on the printing paper 2 on the focus calibration plate 1, wherein the z-axis position of each group of symmetrical parallel lines is different, the middle is 0, the left and the right z values are decreased progressively, and the right and the z values are increased progressively;
2-3: placing the focus calibration plate 1 on a two-coordinate measuring instrument 5 for data measurement, and transmitting the measured data to a data processor 6;
2-4: analyzing the position of the line with the thinnest symmetrical parallel lines through the data processor 6, recording the width and the position of the line, generating a calibration file and transmitting the calibration file to the galvanometer controller 7;
2-5: when the middle lines of all the symmetrical parallel lines in the printing area are all the focal positions, the width of the printing line with the widest middle line is recorded, the linear positions of other positions consistent with the width of the printing line are recorded, and a calibration file is generated and transmitted to the galvanometer controller 7.
In step 3, the sub-step of verifying the accuracy of the focus calibration file includes:
3-1: pasting printing paper 2 on the focus calibration plate 1, and adjusting the height of the calibration plate to enable the focus calibration plate 1 to be located at a laser printing position;
3-2: enabling laser to print a series of symmetrical parallel lines on the printing paper 2 on the focus calibration plate 1;
3-3: placing the focus calibration plate 1 on a two-coordinate measuring instrument 5 for data measurement, and transmitting the measured data to a data processor 6;
3-4: the central lines of all groups of symmetrical parallel lines at the edge of the printing area are analyzed by the data processor 6 to be the thinnest of all groups of symmetrical parallel lines, and the widths of the middle lines of all groups of parallel lines in the printing area are consistent, namely the focus calibration meets the requirement required by printing.
In the step 3-1, the printing paper 2 is coated paper.
Compared with the prior art, the invention has the following advantages and effects:
in the process of calibrating the focus of the three-axis scanning galvanometer, the invention utilizes the width of the symmetrical parallel lines to carry out correction, thereby solving the problems that the difference between the central light spot and the edge light spot of large-format laser printing is large and the energy of the laser in the printing area is uneven due to the size of the light spot at present.
Drawings
FIG. 1 is a schematic view of the focal point calibration process of the three-axis scanning galvanometer of the present invention.
FIG. 2 is a schematic diagram of a three-axis scanning galvanometer focus calibration stage of the present invention.
FIG. 3 is a focal point alignment scan of the three-axis scanning galvanometer of the present invention.
Detailed Description
The present invention will be described in further detail with reference to specific examples.
Examples
As shown in fig. 1-3. The invention discloses a three-axis scanning galvanometer 3 focus calibration platform which comprises a focus calibration plate 1, printing paper 2 pasted on the focus calibration plate 1 and a three-axis scanning galvanometer 3 positioned right above the focus calibration plate 1, wherein the three-axis scanning galvanometer 3 is connected with an optical fiber laser 4, the focus calibration plate 1 is subjected to data measurement by a two-coordinate measuring instrument 5, the measured data is transmitted to a data processor 6, the data processor 6 generates a calibration file to be sent to a galvanometer controller 7, and the galvanometer controller 7 controls the three-axis scanning galvanometer 3 to perform printing operation.
The calibration method of the three-axis scanning galvanometer 3 focus calibration platform can be realized by the following steps:
step 1: a focus calibration platform of a three-axis scanning galvanometer 3 is built;
step 2: calibrating the focus of each position of the printing area;
and step 3: the accuracy of the focus calibration file is verified.
In the step 2, the substep of calibrating the focus at each position of the printing area includes:
2-1: pasting printing paper 2 on the focus calibration plate 1, and adjusting the height of the focus calibration plate 1 to enable the focus calibration plate 1 to be located at a laser printing position (after the device is determined, the position is the powder spreading position of the device);
2-2: enabling laser to print a series of symmetrical parallel lines on the printing paper 2 on the focus calibration plate 1, wherein the z-axis position of each group of symmetrical parallel lines is different, the middle is 0, the left and z values are decreased progressively, and the right and z values are increased progressively (the closer to the focus position, the smaller the light spot, the thinner the printed line width);
2-3: placing the focus calibration plate 1 on a two-coordinate measuring instrument 5 for data measurement, and transmitting the measured data to a data processor 6;
2-4: analyzing the position of the line with the thinnest symmetrical parallel lines through the data processor 6, recording the width and the position of the line, generating a calibration file and transmitting the calibration file to the galvanometer controller 7;
2-5: when the middle lines of all the symmetrical parallel lines in the printing area are all the focal positions, the width of the printing line with the widest middle line is recorded, the linear positions of other positions consistent with the width of the printing line are recorded, and a calibration file is generated and transmitted to the galvanometer controller 7.
In step 3, the sub-step of verifying the accuracy of the focus calibration file includes:
3-1: pasting printing paper 2 on the focus calibration plate 1, and adjusting the height of the calibration plate to enable the focus calibration plate 1 to be located at a laser printing position (after the device is determined, the position is the powder spreading position of the device);
3-2: enabling laser to print a series of symmetrical parallel lines on the printing paper 2 on the focus calibration plate 1;
3-3: placing the focus calibration plate 1 on a two-coordinate measuring instrument 5 for data measurement, and transmitting the measured data to a data processor 6;
3-4: the central lines of all groups of symmetrical parallel lines at the edge of the printing area are analyzed by the data processor 6 to be the thinnest of all groups of symmetrical parallel lines, and the widths of the middle lines of all groups of parallel lines in the printing area are consistent, namely the focus calibration meets the requirement required by printing.
In the step 3-1, the printing paper 2 is coated paper.
As described above, the present invention can be preferably realized.
The embodiments of the present invention are not limited to the above-described embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and they are included in the scope of the present invention.
Claims (5)
1. The utility model provides a triaxial scanning galvanometer (3) focus calibration platform, a serial communication port, including focus calibration board (1), paste printing paper (2) on focus calibration board (1), be located triaxial scanning galvanometer (3) directly over focus calibration board (1), triaxial scanning galvanometer (3) are connected with fiber laser (4), focus calibration board (1) is carried out data measurement by two coordinate measuring apparatu (5), measured data transmission gives data processor (6), data processor (6) generate calibration file for galvanometer controller (7), control triaxial scanning galvanometer (3) by galvanometer controller (7) and print the operation.
2. The method for calibrating a focal point calibration platform of a three-axis scanning galvanometer (3) of claim 1, characterized by the steps of:
step 1: a focus calibration platform of the three-axis scanning galvanometer (3) is built;
step 2: calibrating the focus of each position of the printing area;
and step 3: the accuracy of the focus calibration file is verified.
3. The calibration method of the focal point calibration platform of the three-axis scanning galvanometer (3) according to claim 2, characterized in that: in step 2, the substep of calibrating the focus at each position of the printing area comprises:
2-1: pasting printing paper (2) on the focus calibration plate (1), and adjusting the height of the focus calibration plate (1) to enable the focus calibration plate (1) to be located at a laser printing position;
2-2: enabling laser to print a series of symmetrical parallel lines on printing paper (2) on a focus calibration plate (1), wherein the z-axis position of each group of symmetrical parallel lines is different, the middle is 0, the z value decreases leftwards and increases rightwards;
2-3: placing the focus calibration plate (1) on a two-coordinate measuring instrument (5) for data measurement, and transmitting the measured data to a data processor (6);
2-4: analyzing the position of the thinnest line of the symmetrical parallel line through a data processor (6), recording the width and the position of the thinnest line, generating a calibration file and transmitting the calibration file to a galvanometer controller (7);
2-5: when the middle lines of all the symmetrical parallel lines in the printing area are all the focal positions, the width of the printing line with the widest middle line is recorded, the linear positions of other positions consistent with the width of the printing line are recorded, and a calibration file is generated and transmitted to the galvanometer controller (7).
4. The calibration method of the focal point calibration platform of the three-axis scanning galvanometer (3) according to claim 3, characterized in that: in step 3, the sub-step of verifying the accuracy of the focus calibration file includes:
3-1: pasting printing paper (2) on a focus calibration plate (1), and adjusting the height of the calibration plate to enable the focus calibration plate (1) to be located at a laser printing position;
3-2: enabling laser to print a series of symmetrical parallel lines on printing paper (2) on a focus calibration plate (1);
3-3: placing the focus calibration plate (1) on a two-coordinate measuring instrument (5) for data measurement, and transmitting the measured data to a data processor (6);
3-4: the central lines of all groups of symmetrical parallel lines at the edge of the printing area are analyzed by the data processor (6) to be the finest of all groups of symmetrical parallel lines, and the widths of the middle lines of all groups of parallel lines in the printing area are consistent, namely the focus calibration meets the requirement required by printing.
5. The calibration method of the focal point calibration platform of the three-axis scanning galvanometer (3) according to claim 4, characterized in that: in step 3-1, the printing paper (2) is coated paper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111546536.XA CN114347465A (en) | 2021-12-16 | 2021-12-16 | Triaxial scanning galvanometer focus calibration platform and calibration method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111546536.XA CN114347465A (en) | 2021-12-16 | 2021-12-16 | Triaxial scanning galvanometer focus calibration platform and calibration method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114347465A true CN114347465A (en) | 2022-04-15 |
Family
ID=81100092
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111546536.XA Pending CN114347465A (en) | 2021-12-16 | 2021-12-16 | Triaxial scanning galvanometer focus calibration platform and calibration method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114347465A (en) |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1142813A (en) * | 1997-07-25 | 1999-02-16 | Fuji Xerox Co Ltd | Scanning optical device |
| US20020131029A1 (en) * | 2001-03-16 | 2002-09-19 | Fuji Photo Film Co., Ltd. | Focus inspection device and focusing method |
| CN102189342A (en) * | 2011-05-04 | 2011-09-21 | 苏州天弘激光股份有限公司 | Laser cutting machine with automatic focusing system |
| US20150100149A1 (en) * | 2013-09-19 | 2015-04-09 | Nv Materialise | System and method for calibrating a laser scanning system |
| CN106553338A (en) * | 2015-09-18 | 2017-04-05 | 广东汉邦激光科技有限公司 | Laser 3D printing machine and its vibration mirror scanning calibration system and method |
| CN108778571A (en) * | 2016-03-14 | 2018-11-09 | 瑞尼斯豪公司 | The calibration of increasing material manufacturing equipment |
| CN110785247A (en) * | 2017-06-19 | 2020-02-11 | Addup公司 | Focus calibration of a power radiation source of an additive manufacturing device |
| CN111618424A (en) * | 2019-02-28 | 2020-09-04 | 深圳市大族数控科技有限公司 | Triaxial galvanometer coaxial adjusting device and focal length confirmation method |
| CN112041651A (en) * | 2018-03-27 | 2020-12-04 | 深圳市柔宇科技股份有限公司 | Detection platform, system and method for laser beam focus |
| CN112414674A (en) * | 2020-10-20 | 2021-02-26 | 天津镭明激光科技有限公司 | Rapid processing method for multi-galvanometer laser splicing calibration |
| CN112987504A (en) * | 2021-02-04 | 2021-06-18 | 哈尔滨工业大学 | Focus calibration system and focus calibration method based on light beam scanning angle modulation |
| CN113369680A (en) * | 2020-02-25 | 2021-09-10 | 广东汉邦激光科技有限公司 | Laser calibration device and laser calibration method |
-
2021
- 2021-12-16 CN CN202111546536.XA patent/CN114347465A/en active Pending
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1142813A (en) * | 1997-07-25 | 1999-02-16 | Fuji Xerox Co Ltd | Scanning optical device |
| US20020131029A1 (en) * | 2001-03-16 | 2002-09-19 | Fuji Photo Film Co., Ltd. | Focus inspection device and focusing method |
| CN102189342A (en) * | 2011-05-04 | 2011-09-21 | 苏州天弘激光股份有限公司 | Laser cutting machine with automatic focusing system |
| US20150100149A1 (en) * | 2013-09-19 | 2015-04-09 | Nv Materialise | System and method for calibrating a laser scanning system |
| CN106553338A (en) * | 2015-09-18 | 2017-04-05 | 广东汉邦激光科技有限公司 | Laser 3D printing machine and its vibration mirror scanning calibration system and method |
| CN108778571A (en) * | 2016-03-14 | 2018-11-09 | 瑞尼斯豪公司 | The calibration of increasing material manufacturing equipment |
| CN110785247A (en) * | 2017-06-19 | 2020-02-11 | Addup公司 | Focus calibration of a power radiation source of an additive manufacturing device |
| CN112041651A (en) * | 2018-03-27 | 2020-12-04 | 深圳市柔宇科技股份有限公司 | Detection platform, system and method for laser beam focus |
| CN111618424A (en) * | 2019-02-28 | 2020-09-04 | 深圳市大族数控科技有限公司 | Triaxial galvanometer coaxial adjusting device and focal length confirmation method |
| CN113369680A (en) * | 2020-02-25 | 2021-09-10 | 广东汉邦激光科技有限公司 | Laser calibration device and laser calibration method |
| CN112414674A (en) * | 2020-10-20 | 2021-02-26 | 天津镭明激光科技有限公司 | Rapid processing method for multi-galvanometer laser splicing calibration |
| CN112987504A (en) * | 2021-02-04 | 2021-06-18 | 哈尔滨工业大学 | Focus calibration system and focus calibration method based on light beam scanning angle modulation |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN205219744U (en) | Laser 3D printer and galvanometer scanning calbiration system thereof | |
| CN103744271B (en) | A kind of laser direct writing system and photoetching method | |
| CN107883884B (en) | A kind of optical measuring device and method | |
| CN103837093B (en) | spectral confocal sensor calibration system and method | |
| CN111009013B (en) | Vibrating mirror calibration method for dicing saw | |
| CN100494929C (en) | Method and apparatus for measuring thin-film stress | |
| CN114379081A (en) | Double-laser double-vibrating-mirror same-breadth calibration platform and calibration method thereof | |
| CN106553338A (en) | Laser 3D printing machine and its vibration mirror scanning calibration system and method | |
| CN110802840B (en) | Equipment for automatically testing quality of laser light path | |
| EP1355350A3 (en) | Chip scale marker and marking method | |
| CN113798511B (en) | Double-laser lap joint calibration method based on SLM additive manufacturing technology | |
| CN114347465A (en) | Triaxial scanning galvanometer focus calibration platform and calibration method thereof | |
| CN103017664B (en) | Method and system for calibrating laser beam analyzer | |
| CN1416310A (en) | Method for quick resistance trimming by using laser on printed circuit board directly | |
| CN109014677A (en) | Welding robot bond pad locations teaching method based on laser ranging | |
| CN111981979A (en) | Galvanometer laser splicing calibration device and splicing calibration method | |
| US11518099B2 (en) | Apparatus and method for producing an object by means of additive manufacturing | |
| CN209383668U (en) | Optical fiber coating concentricity on-line control device | |
| WO2024007587A1 (en) | Intelligent correction control method for dlp 3d printing | |
| CN106705888A (en) | CCD coordinate system and mirror coordinate system nonlinear relation calibration method in interference detection | |
| CN115891162A (en) | Galvanometer scanning field correcting device | |
| CN106483778A (en) | Based on relative position measurement to Barebone, double-workpiece-table system and measuring system | |
| CN101009522A (en) | Control method and device for high duplication of making the optical fiber grating | |
| CN108132447A (en) | A kind of electric field probe automatic calibrating method based on standard probe | |
| CN109085129A (en) | Quantitative measuring method of the solder mask to UV light absorption |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20220415 |