CN-122016243-A - Online laser performance verification device and method for laser powder bed melting equipment

CN122016243ACN 122016243 ACN122016243 ACN 122016243ACN-122016243-A

Abstract

The invention relates to the technical field of detection of laser powder bed melting equipment, in particular to an online laser performance verification device and method for laser powder bed melting equipment, which realize wide-area, online and multi-parameter verification of the laser performance of the laser powder bed melting equipment by integrating a verification platform, a verification plane driving platform, a verification control module and various detection elements; meanwhile, the verification platform can rotate around the vertical axis, so that different detection elements can be rapidly switched and accurately detect the incident laser light paths, the requirements of detecting a plurality of items such as the position, the power, the beam quality and the like of the laser at the same position or different positions are met, and the comprehensiveness and the detection efficiency of detection are greatly improved.

Inventors

MIAO KAI
WANG RONGFEI
WANG ZICHEN
GAO SHUANG
XUE HENG
MA RUI
BAI JIE
WANG YAJUN
ZHENG JUNCHAO
Du Weizhe
LI DICHEN
CHEN YIFEI

Assignees

西安交通大学

Dates

Publication Date: 20260512
Application Date: 20260224

Claims (10)

1. The online laser performance verification device of the laser powder bed melting equipment is characterized by comprising a verification platform (10), a verification plane driving platform (20), a verification control module (30) and a detection unit; the detection unit comprises a plurality of detection elements, a plurality of detection element arrays are arranged on the upper surface of the verification platform (10), and the detection elements are used for performing multiple verification on target lasers; the verification platform (10) is rotationally connected with the verification plane driving table (20) around a vertical axis, and the verification platform (10) is used for rotating an incident light path of the corresponding detection element towards the target laser according to verification requirements; The verification plane driving platform (20) is used for driving the verification platform (10) to move along the horizontal direction; The verification control module (30) is respectively in communication connection with the verification platform (10) and the verification plane driving table (20), the verification control module (30) is used for controlling the rotation direction and rotation angle of the verification platform (10) according to the verification requirement and the position of the corresponding detection element on the verification platform (10), is used for obtaining the position of the verification platform (10) on the verification plane driving table (20), is used for mapping the coordinate system of the laser powder bed melting equipment with the coordinate system of the verification plane driving table (20), and is used for driving the verification plane driving table (20) to drive the verification platform (10) to a designated position according to the position of the target laser and the position of the verification platform (10).
2. The on-line laser performance verification device of the laser powder bed melting equipment according to claim 1, wherein the verification control module (30) is further in communication connection with the laser powder bed melting equipment and is used for calculating compensation data according to detection results, sending the compensation data to the laser powder bed melting equipment and acquiring the position of target laser.
3. The on-line laser performance verification device of the laser powder bed melting equipment according to claim 2, wherein the verification plane driving table (20) comprises a transverse moving mechanism (21), a longitudinal moving mechanism (22) and a moving base (23), the verification platform (10) is movably connected with the transverse moving mechanism (21), the transverse moving mechanism (21) is arranged on the longitudinal moving mechanism (22) and is movably connected with the longitudinal moving mechanism (22), and the longitudinal moving mechanism (22) is fixed on the moving base (23); the transverse moving mechanism (21) and the longitudinal moving mechanism (22) are both in communication connection with the verification control module (30).
4. The on-line laser performance verification device of the laser powder bed melting equipment according to claim 2, wherein the verification platform (10) comprises a rotation driving seat (11) and a verification supporting plate (12), a fixed end of the rotation driving seat (11) is connected with a transverse moving mechanism (21), an output end of the rotation driving seat (11) is rotationally connected with the verification supporting plate (12), a plurality of detection element mounting positions (13) are arranged on the upper surface of the verification supporting plate (12), and a plurality of detection element mounting positions (13) are arranged in an array; The rotation driving seat (11) is in communication connection with the verification control module (30).
5. The on-line laser performance verification device for laser powder bed melting equipment according to claim 4, wherein the verification support plate (12) is a regular polygon, and a plurality of the detection element mounting positions (13) are respectively arranged at the top corners of the verification support plate (12).
6. The on-line laser performance verification device of the laser powder bed melting equipment according to claim 4, wherein the detection element comprises a mounting shell and an element body, the mounting shell is sleeved on the periphery of the element body, the bottom of the mounting shell is detachably connected with the verification support plate (12), and the distance between the detection surface of the element body and the bottom of the mounting shell is the same.
7. The on-line laser performance verification device of the laser powder bed melting equipment according to claim 6, further comprising a component library (40), wherein a plurality of detection elements are arranged in an array in the component library (40), the component library (40) is arranged on the outer side of the verification plane driving table (20), and the component library (40) is in communication connection with the verification control module (30); The verification control module (30) is used for driving the verification plane driving platform (20) to drive the verification platform (10) to a specified position when judging that the corresponding detection element is not installed on the verification platform (10) according to the verification requirement, driving the verification platform (10) to rotate the corresponding detection element installation position (13) to the inside of the component library (40), and controlling the component library (40) to install or replace the specified detection element on the detection element installation position (13) which moves to the inside.
8. An online laser performance verification method for laser powder bed melting equipment, which is characterized by comprising the following steps of: S1, verifying that a plane driving table (20) is placed in a forming area of laser powder bed melting equipment for connection and leveling; S2, establishing a mapping relation between a coordinate system of a laser powder bed melting device and a coordinate system of a verification plane driving table (20) according to the position of the verification platform (10); S3, a verification control module (30) sequentially detects specified detection items of the laser at the specified position according to a detection strategy and feeds back compensation data to the laser powder bed melting equipment; s4, judging whether detection of all detection items in the detection strategy is finished, if yes, ending, and if not, executing S5; s5, driving the verification platform (10) to rotate by a corresponding angle according to the detection items and the positions of the corresponding detection elements on the verification platform (10), and re-executing the step S3.
9. The method for verifying the online laser performance of a laser powder bed melting apparatus according to claim 8, wherein the step S1 comprises the steps of: connecting the verification control module (30) with the laser powder bed melting equipment through an open industrial communication interface; placing a verification plane drive table (20) in a forming zone of a laser powder bed fusion apparatus; leveling the verification plane drive table (20) by means of a forming zone; The step S2 includes the steps of: the verification plane driving table (20) drives the verification platform (10) to move along the outer edge of the verification platform for one circle, and the laser powder bed melting equipment acquires the position of the verification platform (10) in a coordinate system of the laser powder bed melting equipment; The verification control module (30) establishes a coordinate system change matrix according to the position of the verification platform (10) in the coordinate system of the plane driving platform (20) and the position of the verification platform (10) in the coordinate system of the laser powder bed melting equipment.
10. The method for verifying the on-line laser performance of a laser powder bed melting apparatus according to claim 8, wherein the step S3 comprises the steps of: S3.1, a verification control module (30) acquires a detection strategy, and determines a detection item, a detection sequence, a detection qualified value and the position of detection laser in a coordinate system of a verification plane driving table (20); S3.2, the verification control module (30) drives the verification platform (10) to move to the component library (40) through the verification plane driving platform (20), and controls the component library (40) to sequentially mount specified detection components on the detection component mounting positions (13) according to detection items; S3.3, the laser powder bed melting equipment acquires a detection strategy and starts corresponding laser according to the position of the detection laser in a coordinate system of the laser powder bed melting equipment; S3.4, the verification control module (30) drives the corresponding detection element to move to the corresponding laser position for detection according to the position of the detection laser in the coordinate system of the verification plane driving table (20) and the position of the corresponding detection element in the coordinate system of the verification plane driving table (20); S3.5, the detection element compares the detection result with the corresponding detection qualified value and then judges whether the detection is qualified, if so, the S3.6 is executed, if not, the compensation data is calculated and sent to the laser powder bed melting equipment, and the current step is executed again; s3.6, judging whether all laser detection is finished, if yes, executing S4, and if not, executing S3.3 again to detect the next laser.

Description

Online laser performance verification device and method for laser powder bed melting equipment Technical Field The invention relates to the technical field of detection of laser powder bed melting equipment, in particular to an online laser performance verification device and method of laser powder bed melting equipment. Background Selective area laser melting (SLM) has shown great potential in the aerospace field as one of the core technologies for metal additive manufacturing. The position, power and beam quality (including size, shape and energy distribution) of the laser spot are key factors for determining the compactness, dimensional accuracy, surface roughness and mechanical property of a formed part, at present, the detection of the laser spot and focal plane of SLM equipment is mostly performed in an off-line mode, on one hand, the detection is mainly aimed at the detection of the position of the spot, the detection frequency is low, the drift during operation cannot be tracked, the installation/removal of a detection device or a calibration target is required to be frequently performed, part of the method also needs long-time optical measurement or manual alignment, and on the other hand, a plurality of representative points are often selected for measurement rather than global on-line monitoring for off-line detection, so that the detection result cannot be effectively ensured to be suitable for actual operation production. For example, chinese patent publication No. CN111069599B provides an on-line monitoring device and method for laser beam energy of 3D printing equipment, in which a laser detector is disposed on a scraper frame, the scraper frame drives a clamping device to connect with the laser detector, then the laser detector is moved to a laser power detection position, measurement data is prepared, and transmitted to an image processing unit for image data processing, and if the image processing unit detects that the spot energy does not meet the system requirement, the laser input energy is adjusted immediately. The laser detection device can only perform power verification on laser at a single designated position, cannot detect the whole area, cannot detect the laser position and the quality according to requirements, and meanwhile, the laser detector and the scraper frame are connected with each other, and the installation position is inaccurate, so that the position deviation exists between the laser detector and the laser scanning vibrating mirror, the detection result is inaccurate, and the normal operation of equipment is interfered. Disclosure of Invention The invention aims to provide an online laser performance verification device and method for laser powder bed melting equipment, and solves the technical problem that the laser powder bed melting equipment is not fully detected. The invention solves the technical problems as follows: an online laser performance verification device of laser powder bed melting equipment comprises a verification platform, a verification plane driving platform, a verification control module and a detection unit; The detection unit comprises a plurality of detection elements, a plurality of detection element arrays are arranged on the upper surface of the verification platform, and the detection elements are used for performing multiple verification on target lasers; the verification platform is rotationally connected with the verification plane driving platform around a vertical axis, and the verification platform is used for rotating an incident light path of the corresponding detection element towards the target laser according to verification requirements; the verification plane driving platform is used for driving the verification platform to move along the horizontal direction; The verification control module is respectively in communication connection with the verification platform and the verification plane driving platform, and is used for controlling the rotation direction and the rotation angle of the verification platform according to the verification requirement and the position of the corresponding detection element on the verification platform, obtaining the position of the verification platform on the verification plane driving platform, mapping the coordinate system of the laser powder bed melting equipment and the coordinate system of the verification plane driving platform, and driving the verification plane driving platform to drive the verification platform to a designated position according to the position of the target laser and the position of the verification platform. Further defined, the verification control module is also in communication connection with the laser powder bed melting device and used for calculating compensation data according to the detection result, sending the compensation data to the laser powder bed melting device and obtaining the position of the target laser. The verification plane driving platform i