Multi-laser rapid bonding method for additive manufacturing equipment

Abstract

This invention relates to a multi-laser rapid overlapping method for additive manufacturing equipment. The method involves controlling a multi-laser galvanometer system to print a test image on laser film using a control model, obtaining scanning image error information from a scanner, acquiring image scanning information from the test image on the laser film using the scanner, and using the scanning image error information to interpolate the angular and positional deviations of the overlapping pattern to obtain the actual positional and angular deviations. If the deviations exceed their respective preset error ranges, the parameters of the control model are calibrated and modified based on the actual positional and angular deviations. Then, starting from the step of providing the laser film, all previous steps are re-executed until the re-acquired actual positional and angular deviations are within their respective preset error ranges. This method improves both the re-overlapping accuracy and the ease of use of the equipment.

Description

Technical Field

[0001] This invention relates to the field of additive manufacturing technology, and in particular to a multi-laser rapid bonding method for additive manufacturing equipment. Background Technology

[0002] The development of multi-laser overlapping technology stems from the continuous pursuit and improvement of 3D printing efficiency and part size. When printing large and complex metal parts, problems such as low efficiency and insufficient precision are often encountered. Therefore, the simultaneous operation of dual laser galvanometer systems has become the mainstream technology.

[0003] Existing technology typically uses a laser galvanometer system as a reference, simultaneously printing test patterns to detect deviations between two systems, including positional deviations in the X and Y directions and angular deviations between two regions. After detecting the deviations, the execution file of the non-reference group is adjusted to make the two groups overlap.

[0004] However, the traditional method of adjusting the execution file of the non-reference group to make the two groups overlap often requires sacrificing the perpendicularity of the beam at the center of the galvanometer, and the phenomenon of misalignment of the overlapping area often occurs, requiring frequent fine adjustments. Therefore, the equipment operator needs to be able to perform this maintenance himself. Summary of the Invention

[0005] Therefore, it is necessary to provide a multi-laser rapid overlapping method for additive manufacturing equipment that is easy to use and can improve the overlapping accuracy of overlapping areas.

[0006] A method for rapid multi-laser bonding in additive manufacturing equipment includes the following steps:

[0007] A preliminary control model for the multi-laser galvanometer system has been established.

[0008] Place the calibration plate within the multi-laser overlap area of ​​the additive manufacturing equipment;

[0009] A laser film with reference scale printed on it is attached to the upper surface of the calibration plate;

[0010] The control model is used to control the multi-laser galvanometer system to print test images on the upper surface of the laser film;

[0011] The laser film printed with the test image is scanned using a scanner to obtain scanned image information; the scanned image information includes image scan information and reference scale scan information.

[0012] Obtain standard reference scale information based on the reference scale on the laser film;

[0013] Image scanning error information is obtained based on the reference scale scanning information and the standard reference scale information;

[0014] Identify the scanning angle deviation and scanning position deviation values ​​of the overlapping pattern relative to its corresponding reference pattern in the image scanning information; the reference pattern and the corresponding overlapping pattern are distributed adjacently;

[0015] Based on the image scanning error information, interpolation operations are performed on the scanning angle deviation value and the scanning position deviation value to obtain the actual angle deviation value and the actual position deviation value, respectively.

[0016] Determine whether the actual angle deviation value and the actual position deviation value are within their respective preset error ranges;

[0017] If not, the parameters in the control model are calibrated and modified based on the actual angle deviation value and the actual position deviation value;

[0018] Return to the step of attaching the laser film with the reference scale printed on it to the upper surface of the calibration plate until the actual angle deviation value and the actual position deviation value are both within their respective preset error ranges;

[0019] Identify the size deviation value of the overlapping pattern in the image scanning information relative to its corresponding reference pattern;

[0020] The scan size deviation value is interpolated based on the image scanning error information to obtain the actual size deviation value;

[0021] Determine whether the actual size deviation value is within the preset size error range;

[0022] If not, the parameters in the control model are calibrated and modified according to the actual magnitude deviation value;

[0023] Return to the step of attaching the laser film with the reference scale to the upper surface of the calibration plate until the actual size deviation value is within the preset size error range.

[0024] The aforementioned multi-laser rapid overlap method for additive manufacturing equipment involves controlling a multi-laser galvanometer system via a control model to print a test image on a laser film located within the multi-laser overlap area. The laser film containing the test image is used to obtain the scanner's scanning image error information. This error information is then used to interpolate the angular and positional deviations of the overlapped pattern relative to the reference pattern in the scanned image, yielding the actual positional and angular deviations. If neither the actual positional nor the actual angular deviation is within its preset error range, the parameters of the control model are calibrated and modified based on these deviations. The process is then restarted from the step of providing the laser film. All previous steps are repeated until the actual position deviation and actual angle deviation values ​​are within their respective preset error ranges to automatically adjust the misalignment in the laser overlap area. Then, the size deviation value of the overlap pattern relative to the reference pattern is obtained. If the size deviation value is not within the preset size error range, the control model is calibrated and modified according to the size deviation value. Then, all previous steps are repeated from the step of providing the laser film until the size deviation value is within the preset size error range to automatically adjust the imaging size of each laser in the laser overlap area. This eliminates the need for frequent fine adjustments by the equipment operator, improving the overlap accuracy of the overlapping area while enhancing the ease of use of the equipment. Attached Figure Description

[0025] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiments below. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0026] Figure 1 This is a flowchart illustrating a multi-laser rapid bonding method for additive manufacturing equipment in a preferred embodiment of the present invention.

[0027] Figure 2 for Figure 1 The flowchart shown is a schematic diagram of step S20 in the multi-laser rapid bonding method for additive manufacturing equipment.

[0028] Figure 3 for Figure 1 The flowchart shown is a schematic diagram of step S30 in the multi-laser rapid bonding method for additive manufacturing equipment.

[0029] Figure 4 for Figure 1 The flowchart shown is a diagram of steps S801 and S802 added before step S80 in the multi-laser rapid bonding method for additive manufacturing equipment.

[0030] Figure 5 for Figure 1 The diagram shows a flow chart of step S90 in the multi-laser rapid bonding method for additive manufacturing equipment. Detailed Implementation

[0031] To facilitate understanding of the present invention, a more complete description will be given below with reference to the accompanying drawings. Preferred embodiments of the invention are shown in the drawings. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a thorough and complete understanding of the disclosure of the invention.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0033] When describing positional relationships, unless otherwise specified, when an element is referred to as being "on" another element, it may be directly on the other element or there may be intermediate elements. It is also understood that when an element is referred to as being "between" two elements, it may be the only one between the two elements, or there may be one or more intermediate elements.

[0034] When using the terms “including,” “having,” and “comprising” as described herein, another component may be added unless explicitly qualifying terms such as “only,” “consisting of,” etc. are used. Unless otherwise stated, singular terms may include plural forms and should not be construed as having a quantity of one.

[0035] Please see Figure 1 The multi-laser rapid bonding method for additive manufacturing equipment in a preferred embodiment of the present invention includes steps S10 to S108.

[0036] Step S10: Initially establish the control model of the multi-laser galvanometer system. This control model is used to control the multi-laser galvanometer system to perform printing operations according to preset instructions.

[0037] Step S20: Place the calibration plate within the multi-laser overlap area of ​​the additive manufacturing equipment. Specifically, the calibration plate is made of a transparent material, such as transparent glass.

[0038] Step S30: Attach the laser film printed with reference scale to the calibration plate. In the reference scale, any two adjacent scale marks are equidistant.

[0039] Step S40: Use the control model to control the multi-laser galvanometer system to print a test image on the upper surface of the laser film.

[0040] Specifically, the control model is used to control multiple lasers in the multi-laser galvanometer system to print a pattern on the laser film according to preset instructions. These patterns together form the test image mentioned above.

[0041] Step S50: Use a scanner to scan the laser film printed with the test image to obtain scanned image information. The scanned image information includes image scan information and reference scale scan information. Specifically, image scan information refers to the image information obtained after scanning the test image, and reference scale scan information refers to the image information obtained after scanning the reference scale on the laser film.

[0042] Step S60: Obtain standard reference scale information based on the reference scale on the laser film.

[0043] Step S70: Obtain image scanning error information based on the reference scale scanning information and the standard reference scale information.

[0044] When a scanner scans a laser film printed with a test image, the scanned image may deviate from the actual test image due to the position and angle of the scanner lens. This is the image scanning error of the scanner. For example, if the spacing between the reference scales on the laser film is 10 mm, but the spacing between the reference scales in the scanned image is 9.8 mm, then the image scanning error is 0.2 mm.

[0045] Step S80: Identify the scanning angle deviation and scanning position deviation values ​​of the overlapping pattern relative to its corresponding reference pattern in the image scanning information. The reference pattern and its corresponding overlapping pattern are distributed adjacently.

[0046] Each reference graphic and each overlapping graphic in the image scanning information corresponds to a reference graphic and an overlapping graphic in the test image, respectively. That is, after the reference graphic in the test image is scanned, the reference graphic in the image scanning information will be obtained, and after the overlapping graphic in the test image is scanned, the overlapping graphic in the image scanning information will be obtained.

[0047] Step S90: Based on the image scanning error information, interpolation calculations are performed on the scanning angle deviation value and the scanning position deviation value to obtain the actual angle deviation value and the actual position deviation value, respectively.

[0048] Step S101: Determine whether the actual angle deviation value and the actual position deviation value are within their respective preset error ranges. That is, determine whether the actual angle deviation value is within the preset angle deviation error range and whether the actual position deviation value is within the preset position deviation error range.

[0049] Step S102: If not, then calibrate and modify the parameters in the control model based on the actual angle deviation value and the actual position deviation value. That is, calibrate the parameters in the control model based on the actual angle deviation value and the actual position deviation value of the current overlapping pattern relative to the reference pattern to eliminate the overlapping deviation between the current overlapping pattern and the reference pattern when printing with the multi-laser galvanometer system.

[0050] Step S103: Return to step S30 until both the actual angle deviation and the actual position deviation are within the error range. That is, return to repeat steps S30 to S102 until both the actual angle deviation and the actual position deviation obtained in step S90 are within their respective preset error ranges.

[0051] Step S104: Identify the scanning size deviation value of the overlapping pattern relative to its corresponding reference pattern in the image scanning information.

[0052] Step S105: Perform interpolation calculation on the scan size deviation value based on the scan error information to obtain the actual size deviation value;

[0053] Step S106: Determine whether the actual size deviation value is within the preset size error range.

[0054] Step S107: If not, then calibrate and modify the parameters in the control model according to the actual magnitude deviation value.

[0055] Step S108: Return to step S30 until the actual size deviation value is within the preset size error range.

[0056] In step S10, the calibration plate is placed in the multi-laser overlap area of ​​the multi-laser galvanometer system to ensure that the laser film is accurately positioned in the multi-laser overlap area during subsequent test image printing, thus facilitating the acquisition of a multi-laser overlap pattern. Steps S50 to S70 obtain the scanner's image scanning error. Steps S80 and S90 then interpolate the scanning angle and position deviation values ​​in the overlap pattern based on the scanner's image scanning error to ensure that the obtained actual angle and position deviation values ​​are closer to the actual angle and position deviation values ​​of the overlap pattern printed by the multi-laser galvanometer system. Steps S101 to S103 repeatedly perform steps such as judging the deviation of the actual position and angle deviation values, calibrating the control model, reprinting the test image, re-determining the scanner's image scanning error, and determining the actual angle and position deviation values, thereby achieving automatic adjustment and calibration of the control model.

[0057] By repeatedly executing steps such as judging the deviation of the actual position and angle of the overlapping pattern relative to the reference pattern, calibrating the control model, printing the test image, determining the scanning error of the scanner, and determining the actual angle and position deviation of the overlapping pattern relative to the reference pattern in the test image, the control model of the multi-laser galvanometer system is automatically adjusted and calibrated. By executing steps S104 to S108, and repeatedly executing steps such as judging the deviation of the size of the overlapping pattern relative to the reference pattern, calibrating the control model, reprinting the test image, and determining the size deviation of the overlapping pattern relative to the reference pattern in the test image, the control model of the multi-laser galvanometer system is automatically adjusted and calibrated to ensure high overlapping accuracy in the final printed image of the multi-laser galvanometer system.

[0058] Therefore, by executing steps S10 to S108, the misalignment of the overlapping area printed by the multi-laser galvanometer system can be automatically calibrated and adjusted to automatically eliminate the overlapping deviation of the multi-laser galvanometer system, and the imaging size of each laser in the laser overlapping area can be automatically adjusted to improve the overlapping accuracy. This eliminates the need for frequent fine adjustments by the equipment operator, and improves the ease of use of the equipment while improving the overlapping accuracy of the overlapping area.

[0059] Please also refer to Figure 2 In some embodiments, step S20 includes steps S21 to S23.

[0060] Step S21: A support platform is installed on the piston of the additive manufacturing equipment. Specifically, the support platform is configured with an adjustable upper surface level to ensure that the laser film is in a highly level state when printing the test image in subsequent steps, thereby improving the accuracy of the final positional and angular deviations and further enhancing the overlap accuracy.

[0061] Specifically, the support platform includes a support plate and multiple height adjustment structures disposed below the support plate. Each height adjustment structure adjusts the height of a corresponding area of ​​the support plate to achieve levelness adjustment. The height adjustment structure can be a threaded height adjustment structure for manual height adjustment using bolts and threaded holes, or a telescopic mechanism in the height direction, etc.

[0062] Step S22: Determine the position of the multi-laser overlap area on the support platform based on the multiple laser beams emitted by the multi-laser galvanometer system. That is, the overlap area formed by the multiple laser spots on the surface of the support platform when the lasers emitted simultaneously by multiple lasers in the multi-laser galvanometer system illuminate the support platform is the multi-laser overlap area.

[0063] Step S23: Place the calibration plate in the multi-laser overlap area on the upper surface of the support platform.

[0064] Thus, by performing steps S21 to S23, the calibration plate can be accurately placed in the multi-laser overlapping area of ​​the additive manufacturing equipment, which is beneficial to further improving the overlapping accuracy.

[0065] Please also refer to Figure 3 Furthermore, in some embodiments, step S30 includes steps S31 and S32.

[0066] Step S31: Place the laser film on the upper surface of the calibration plate in a preset orientation.

[0067] In step S32, the piston controls the lifting and lowering of the support platform until the height of the upper surface of the laser film is consistent with the height of the laser-printed sintered surface.

[0068] By executing step S31, a complete test image can be printed on the laser film. By executing step S32, the laser film is positioned at the printing and sintering surface of the additive manufacturing equipment to ensure the accuracy of the test image and further improve the overlap calibration accuracy.

[0069] Furthermore, in some embodiments, the upper surface of the calibration plate has a film guard edge. Specifically, the film guard edge on the calibration plate can be a single straight edge, two intersecting straight edges, or multiple straight edges that can form a ring to create a film placement area.

[0070] Step S31 involves placing the laser film onto the upper surface of the calibration plate, with at least one edge of the laser film abutting against the film stop. This utilizes the film stop on the calibration plate to define the placement direction and position of the laser film, ensuring that the laser film is accurately placed at the designated location on the calibration plate, which further improves the accuracy of the overlap calibration.

[0071] In some embodiments, step S40 is: using a control model to control a multi-laser galvanometer system to perform two consecutive low-power prints on the upper surface of the laser film to obtain a test image.

[0072] The multi-laser galvanometer system prints two consecutive low-power prints on the laser film to obtain the test image. This makes the test image clearer without damaging the laser film, which is beneficial for obtaining clear scanned image information during subsequent image scanning. This improves the accuracy of the actual angle deviation value, actual position deviation value, and actual size deviation value obtained later, thereby further improving the overlap calibration accuracy.

[0073] Please also refer to Figure 4 In some embodiments, steps S801 and S802 are included before step S80.

[0074] Step S801: Establish a scanning coordinate system based on the first reference graphic in the image scanning information.

[0075] Step S802: Identify the scanning angle deviation and scanning position deviation values ​​of the overlapping graphic relative to its corresponding reference graphic in the scanning coordinate system in the image scanning information.

[0076] Thus, by establishing a scanning coordinate system, the coordinates of the overlapping graphics in the image scanning information can be accurately determined, and the scanning angle deviation and scanning position deviation values ​​can be accurately obtained.

[0077] Please also refer to Figure 5 Furthermore, in some embodiments, step S90 includes steps S91 and S92.

[0078] Step S91: Perform interpolation calculation on the scanning angle deviation value based on the image scanning error information to obtain the overall deflection angle of the overlapping pattern in the image scanning information relative to its corresponding reference pattern in the scanning coordinate system.

[0079] Step S92: Perform interpolation on the scanning position deviation value based on the image scanning error information to obtain the offset distance of the overlapping pattern in the scanning image information relative to its corresponding reference pattern in the X direction and the offset distance in the Y direction in the scanning coordinate system.

[0080] The numbers in steps S91 and S92 are not used to specify the order in which the two steps are executed. By executing steps S91 and S92, the overall deflection angle, offset distance in the X direction, and offset distance in the Y direction of the overlapping pattern relative to its corresponding reference pattern in the scanned image information can be accurately obtained, and the calculation is simple.

[0081] Furthermore, in some embodiments, step S101: determine whether the overall deflection angle, the offset distance in the X direction, and the offset distance in the Y direction are within their respective preset error ranges.

[0082] Step S102 is: if not, then generate calibration parameters based on the overall deflection angle, the offset distance in the X direction, and the offset distance in the Y direction.

[0083] In this way, the overall deflection angle reflects the deflection angle of the overlapping pattern, and the offset distance in the X direction and the offset distance in the Y direction together reflect the deflection distance of the overlapping pattern. This not only makes it easy to determine whether the overlapping error is within the preset allowable error range, but also makes it easy to calibrate and modify the parameters in the control module of the multi-laser galvanometer system.

[0084] In some embodiments, by executing steps S30 to S108, when the actual angle deviation, actual position deviation, and actual size deviation of the reference image relative to the corresponding reference graphic are adjusted to their respective preset error ranges, the current overlapping graphic is adjusted.

[0085] When the number of lasers in a multi-laser galvanometer system is less than or equal to 3, the reference pattern is adjacent to all overlapping patterns. By performing the above steps S30 to S108, the actual angular deviation, actual positional deviation, and size deviation of all overlapping patterns relative to the reference pattern can be adjusted simultaneously.

[0086] When the number of lasers in a multi-laser galvanometer system is greater than 3 (n), the steps for debugging all patterns include: taking the first pattern as the first set of reference patterns, taking the patterns adjacent to the first pattern as the first set of overlapping patterns, and debugging the actual angular deviation, actual positional deviation, and magnitude deviation of the first set of overlapping patterns relative to the first set of reference patterns until all of these deviations are within their respective preset error ranges, thus achieving the debugging of the first set of overlapping patterns; using the debugged first set of overlapping patterns as... The second set of reference patterns, with the patterns adjacent to them as the second set of overlapping patterns, is used to adjust the actual angular deviation, positional deviation, and magnitude deviation of the second set of overlapping patterns relative to the second set of reference patterns. This process is repeated until the actual angular deviation, positional deviation, and magnitude deviation of all patterns are within their respective preset error ranges, thus achieving the adjustment of the second set of overlapping patterns. Therefore, this multi-laser rapid overlapping method for additive manufacturing equipment enables automatic adjustment of multi-laser galvanometer systems containing multiple lasers, facilitating accurate, reliable, and efficient part printing in additive manufacturing equipment.

[0087] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0088] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A method for rapid multi-laser bonding in additive manufacturing equipment, characterized in that, Including the following steps: A preliminary control model for the multi-laser galvanometer system has been established. Place the calibration plate within the multi-laser overlap area of ​​the additive manufacturing equipment; A laser film with reference scale printed on it is attached to the upper surface of the calibration plate; The control model is used to control the multi-laser galvanometer system to print test images on the upper surface of the laser film; The laser film printed with the test image is scanned using a scanner to obtain scanned image information; the scanned image information includes image scan information and reference scale scan information. Obtain standard reference scale information based on the reference scale on the laser film; Image scanning error information is obtained based on the reference scale scanning information and the standard reference scale information; Identify the scanning angle deviation and scanning position deviation values ​​of the overlapping pattern relative to its corresponding reference pattern in the image scanning information; the reference pattern and the corresponding overlapping pattern are distributed adjacently; Based on the image scanning error information, interpolation operations are performed on the scanning angle deviation value and the scanning position deviation value to obtain the actual angle deviation value and the actual position deviation value, respectively. Determine whether the actual angle deviation value and the actual position deviation value are within their respective preset error ranges; If not, the parameters in the control model are calibrated and modified based on the actual angle deviation value and the actual position deviation value; Return to the step of attaching the laser film with the reference scale printed on it to the upper surface of the calibration plate until the actual angle deviation value and the actual position deviation value are both within their respective preset error ranges; Identify the scan size deviation value of the overlapping pattern relative to the reference pattern; The scan size deviation value is interpolated based on the image scanning error information to obtain the actual size deviation value; Determine whether the actual size deviation value is within the preset size error range; If not, the parameters in the control model are calibrated and modified according to the actual magnitude deviation value; Return to the step of attaching the laser film with the reference scale to the upper surface of the calibration plate until the actual size deviation value is within the preset size error range.

2. The multi-laser rapid bonding method for additive manufacturing equipment according to claim 1, characterized in that, The step of placing the calibration plate within the multi-laser overlap area of ​​the additive manufacturing equipment includes: A support platform is installed on the piston of the additive manufacturing equipment; The position of the multi-laser overlap area on the bearing platform is determined by the multiple laser beams emitted by the multi-laser galvanometer system. The calibration plate is placed in the multi-laser overlap area on the upper surface of the support platform.

3. The multi-laser rapid bonding method for additive manufacturing equipment according to claim 2, further characterized in that, The step of attaching the laser film printed with reference scale to the calibration plate includes: The laser film is attached and placed in a preset position on the upper surface of the calibration plate in a preset posture; The piston is used to control the lifting and lowering of the support platform until the height of the upper surface of the laser film is consistent with the height of the laser-printed sintered surface.

4. The multi-laser rapid bonding method for additive manufacturing equipment according to claim 3, further characterized in that the upper surface of the calibration plate has a film guard edge; The step of attaching the laser film to a preset position on the upper surface of the calibration plate in a preset posture is as follows: attaching the laser film to the upper surface of the calibration plate, and making at least one edge of the laser film abut against the film stop edge.

5. The multi-laser rapid bonding method for additive manufacturing equipment according to claim 3, further characterized in that, after the step of placing the laser film in a preset posture at a preset position on the upper surface of the calibration plate, the method further includes the step of: Determine whether there are air bubbles or warping between the laser film and the calibration plate; If not, return to the step of attaching the laser film to the calibration plate until there are no air bubbles or warping between the laser film and the calibration plate.

6. The multi-laser rapid overlapping method for additive manufacturing equipment according to claim 1, further characterized in that the step of using the control model to control the multi-laser galvanometer system to print a test image on the upper surface of the laser film is as follows: The control model is used to control the multi-laser galvanometer system to perform two consecutive low-power prints on the upper surface of the laser film to obtain a test image.

7. The multi-laser rapid overlapping method for additive manufacturing equipment according to claim 1, further characterized in that, before the step of identifying the scanning angle deviation value and scanning position deviation value of the overlapping pattern relative to the corresponding reference pattern in the image scanning information, the method further includes the step of: Establish a scanning coordinate system based on the first reference graphic in the image scanning information; Identify the scanning angle deviation and scanning position deviation values ​​of the overlapping pattern relative to its corresponding reference pattern in the scanning coordinate system within the image scanning information.

8. The multi-laser rapid overlapping method for additive manufacturing equipment according to claim 7, further characterized in that the step of interpolating the scanning angle deviation value according to the image scanning error information to obtain the actual angle deviation value, and interpolating the scanning position deviation value according to the image scanning error information to obtain the actual position deviation value, includes: The scanning angle deviation value is interpolated based on the image scanning error information to obtain the overall deflection angle of the overlapping pattern in the image scanning information relative to the corresponding reference pattern in the scanning coordinate system. Based on the image scanning error information, interpolation is performed on the scanning position deviation value to obtain the offset distance of the overlapping pattern in the scanned image information relative to its corresponding reference pattern in the X direction and the offset distance in the Y direction in the scanning coordinate system.

9. The multi-laser rapid overlapping method for additive manufacturing equipment according to claim 8, wherein the step of determining whether the actual angle deviation value and the actual position deviation value are within their respective preset error ranges is: determining whether the overall deflection angle, the offset distance in the X direction, and the offset distance in the Y direction are within their respective preset error ranges; If not, the step of generating calibration parameters based on the actual angle deviation value and the actual position deviation value is as follows: If not, the calibration parameters are generated based on the overall deflection angle, the offset distance in the X direction, and the offset distance in the Y direction.

10. The multi-laser rapid overlapping method for additive manufacturing equipment according to claim 1, characterized in that, When the number of lasers in the multi-laser galvanometer system is less than or equal to 3, the reference pattern is adjacent to all the overlapping patterns, and the actual angle deviation, actual position deviation, and size deviation of all the overlapping patterns relative to the reference pattern are adjusted. When the number of lasers in the multi-laser galvanometer system is greater than 3 (n), the steps for debugging all the graphics include: taking the first graphic as the first set of reference graphics, taking the graphics adjacent to the first graphic as the first set of overlapping graphics, and debugging the actual angle deviation, actual position deviation, and size deviation values ​​of the first set of overlapping graphics relative to the first set of reference graphics. Using the first set of overlapping graphics that has been debugged as the second set of reference graphics, and the graphics adjacent to the second set of reference graphics as the second set of overlapping graphics, the actual angle deviation, actual position deviation, and size deviation of the second set of overlapping graphics relative to the second set of reference graphics are adjusted until the actual angle deviation, actual position deviation, and size deviation of all graphics are within their respective preset error ranges.

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