OCT penetration detection light beam position correction method for static welding and welding method

Abstract

The invention discloses an OCT penetration detection light beam position correction method for static welding and a welding method, and belongs to the technical field of laser welding. On the basis of determining a welding path and a laser welding process, a weld pool keyhole position test is carried out on a weld track, and position compensation coordinates corresponding to at least part of welding spot light beams are determined; a position correction file of the detection light beam is obtained according to position compensation coordinate fitting analysis, and then position correction of the OCT penetration detection light beam under static welding is completed. The OCT fusion depth detection light beam position correction method for static welding is simple in step and convenient to operate, compensation correction of the action position of the detection light beam relative to the position of the processing light beam can be accurately achieved, conditions are provided for accurate control over the position of the detection light beam in the static welding process, and the working efficiency is improved. Accurate measurement of the laser welding fusion depth in the static welding process is achieved, the workpiece static welding quality is guaranteed, the workpiece machining efficiency and quality are improved, and good economic benefits are achieved.

Description

Technical Field

[0001] This invention belongs to the field of laser welding technology, specifically relating to an OCT penetration depth detection beam position correction method and a welding method for static welding. Background Technology

[0002] With the continuous development of my country's industrial technology, the demand for laser welding is increasing, and the quality requirements for laser welding are also becoming more stringent, driving the rapid development of related technologies. In the laser welding process, weld quality inspection is a crucial part of welding quality control.

[0003] Currently, there are few mature methods and equipment available for the precise inspection and control of weld quality, and the accuracy of the inspection results is also somewhat controversial. Among them, OCT weld penetration testing equipment is a relatively mature device that can detect weld penetration in real time online. Using it to detect weld penetration can improve inspection efficiency and accuracy to a certain extent, reduce the number of quality inspectors, improve production efficiency and quality, and reduce labor costs and huge losses caused by the production and use of defective products.

[0004] However, OCT weld penetration testing equipment has only recently begun industrial application and has not yet reached a fully mature level, with many engineering problems still needing to be solved. For OCT weld penetration testing, it is crucial to ensure that the detection beam accurately enters the "keyhole" (i.e., welding keyhole) formed by the processing beam during welding. Maintaining the correct position of the detection beam is extremely difficult. Currently, most methods for controlling the detection beam position involve setting and adjusting the relative positions of the detection and processing beams before welding begins and keeping these relative positions constant during the welding process. While this method can meet certain application requirements for straight welds and non-oscillating welding scenarios, its application is too limited. Moreover, for existing laser welding equipment, it is difficult to ensure that the detection beam and the processing beam are completely coaxially emitted from the field lens. There is already a gap between the two beams at the exit position of the field lens. In addition, the processing beam is not always processed in a perpendicular manner. This results in an uncertain distance between the two beams when they reach the workpiece surface, that is, there is a significant "stroke difference". The existence of the "stroke difference" makes it difficult for the detection beam to accurately enter the welding keyhole, thus making it impossible to accurately measure the welding penetration depth and affecting the accurate judgment of the welding processing quality. Summary of the Invention

[0005] In response to one or more of the above-mentioned defects or improvement needs of the prior art, the present invention provides an OCT penetration depth detection beam position correction method and a welding method for static welding. It can effectively realize the automatic compensation and correction of the OCT penetration depth detection beam position during galvanometer scanning static laser welding, ensuring that the position of the detection beam irradiating the workpiece always corresponds to the position of the welding keyhole, thereby accurately completing the real-time detection of the keyhole penetration depth during static welding.

[0006] To achieve the above objectives, one aspect of the present invention provides a method for correcting the beam position of an OCT penetration depth detector for static welding, comprising the following steps: S1: Determine the welding path and laser welding process; S2: Perform a keyhole position test on the weld trajectory along the welding path to determine the position compensation coordinates of the detection beam for at least some weld points on each weld trajectory; S3: Perform fitting analysis on the compensation coordinates at each position to obtain a formula that conforms to the rule ( x = f ( x ), y = f ( y Based on this, a position correction file for the detection beam is generated, and the position correction of the OCT penetration detection beam under static welding is completed.

[0007] As a further improvement of the present invention, in S2, the keyhole position test of the molten pool corresponding to each weld trajectory includes the following process: Select i weld points uniformly along the weld trajectory as the research object, and determine the coordinates (X, X) of each weld point in the rectangular coordinate system of the machining plane. i Y i ), where i is an integer; Through welding experiments, the specific keyhole positions of i weld points are accurately determined, and the relative coordinate values ​​of each keyhole with respect to its respective weld point are obtained. x i , y i The relative coordinate value is the position compensation coordinate of the detection beam.

[0008] As a further improvement of the present invention, relative coordinate values ​​( x i , y i The coordinate system is determined by constructing a compensation coordinate system with its corresponding solder joint as the origin. The horizontal and vertical axes of this compensation coordinate system are parallel to the horizontal and vertical axes of the plane rectangular coordinate system, respectively.

[0009] As a further improvement of the present invention, in S1, the welding path includes one or more weld seam trajectories; and / or, the welding process includes at least the necessary welding parameters required for welding, the welding parameters including the focused spot diameter of the processing laser, the laser power, the welding speed and the incident angle.

[0010] As a further improvement of the present invention, in the laser welding process of S1, the processing laser is oscillating welding, and the welding parameters also include the oscillation parameters of the processing laser, wherein the oscillation parameters include at least the oscillation pattern, the oscillation amplitude and the oscillation frequency.

[0011] As a further improvement of the present invention, after completing the formula in S3, a verification process for the formula is also performed: Select s new solder joints as the research object, and determine the coordinates (X, y, y) of each solder joint in the Cartesian coordinate system. s Y s ), where s is an integer; through welding experiments, accurately determine the specific keyhole positions of these s new weld points, and obtain the position compensation coordinates of each keyhole relative to each new weld point ( x s , y s Substitute the compensation coordinates of each position into the aforementioned formula ( x = f ( x ), y = f ( y In this process, the formula is verified. If the verification results show that the formula is inaccurate, then the fitting formula is corrected by combining the position compensation coordinates of each new solder point; the verification and correction process is repeated until the formula ( x = f ( x ), y = f ( y The accuracy of the data meets the standards.

[0012] As a further improvement of the present invention, the position compensation coordinates of the detection beam at each weld point are located on the corresponding weld trajectory.

[0013] Another aspect of the present invention provides a galvanometer scanning laser welding method for static welding, which includes the aforementioned OCT penetration depth detection beam position correction method for static welding, and further includes the following steps: S4: Control the welding of the processing beam according to the welding process determined in S1, and determine the working position of the detection beam relative to the processing beam according to the position correction document determined in S3. Perform laser welding of each weld trajectory and simultaneously complete the penetration depth detection of each weld point.

[0014] The aforementioned improved technical features can be combined with each other as long as they do not conflict with each other.

[0015] In summary, the beneficial effects of the above-described technical solutions conceived by this invention compared with the prior art include: (1) The OCT penetration depth detection beam position correction method of the present invention, based on the determination of the welding path and laser welding process, performs a keyhole position test on the weld trajectory to determine the position compensation coordinates of the beam corresponding to at least some weld points, and obtains the position correction file of the detection beam according to the fitting analysis of the position compensation coordinates, thereby completing the position correction of the OCT penetration depth detection beam under static welding, ensuring the accuracy of the detection beam position control under static welding, realizing the accurate detection of weld penetration depth during static welding, and ensuring the welding quality of the workpiece.

[0016] (2) The OCT penetration depth detection beam position correction method of the present invention, through optimized design of the detection beam position correction process and through the design of welding experiments, ensures the reliability and accuracy of the position compensation coordinate acquisition, and provides a basis for subsequent detection beam compensation formulas ( x = f ( x ), y = f ( y The accurate expression of )) provides a basis for further ensuring the accuracy of the control of the detection beam position correction process.

[0017] (3) The OCT penetration depth detection beam position correction method for static welding of the present invention uses a detection beam compensation formula obtained from fitting analysis ( x = f ( x ), y = f ( y The setting of verification and correction processes fully ensures the reliability of the detection beam position determination, providing a basis and guarantee for the position coordinate control of the detection beam relative to the processing beam during static welding, and further ensuring the processing accuracy of static welding.

[0018] (4) The galvanometer scanning laser welding method for static welding of the present invention has simple steps and is easy to use. It uses a beam position correction method to correct the relative position between the OCT penetration detection beam and the processing beam during the galvanometer scanning static laser welding process, accurately compensates for the optical path difference introduced by the difference in the exit position of the detection beam and the processing beam, and ensures that the scanning detection of the detection beam can be carried out under the condition of compensating for the aforementioned optical path difference, thereby ensuring the accuracy of OCT penetration detection during the galvanometer scanning flying welding process and improving the welding quality and efficiency of the workpiece.

[0019] (5) The OCT penetration depth detection beam position correction method for static welding in this invention has simple steps and convenient operation. It can accurately realize the compensation and correction of the detection beam position relative to the processing beam position, providing conditions for accurate control of the detection beam position during static welding, realizing accurate measurement of laser welding penetration depth during static welding, ensuring the quality of static welding of workpieces, improving the processing efficiency and quality of workpieces, and having good economic benefits. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a flowchart illustrating the OCT penetration depth detection beam position correction method for static welding in an embodiment of the present invention. Figure 2 This is a schematic diagram of the stroke difference between the detection beam and the processing beam at different exit angles in static welding mode, as shown in an embodiment of the present invention. Figure 3 This is a schematic diagram illustrating the positional differences between the processing beam and the detection beam at different locations along the weld trajectory in an embodiment of the present invention; In all the accompanying drawings, the same reference numerals denote the same technical features, specifically: 1. Galvanometer scanning laser welding head; 2. First processing beam; 3. First detection beam; 4. Second processing beam; 5. Second detection beam; 6. Processing beam exit point; 7. Detection beam exit point; 8. Workpiece to be welded; 9. Processing coordinate system Y-axis; 10. Processing coordinate system X-axis; 11. Weld trajectory; 12. First weld point; 13. Second weld point; 14. First detection beam irradiation point; 15. Second detection beam irradiation point. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention. Furthermore, the technical features involved in the various embodiments of this invention described below can be combined with each other as long as they do not conflict with each other.

[0023] In the description of this invention, it should be understood that, unless otherwise expressly specified and limited, the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0024] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0025] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0026] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0027] Example: For the OCT penetration depth detection beam position correction method for static welding in the preferred embodiment of the present invention, its main application scenario is the galvanometer scanning static laser welding process, especially the application scenario where it is difficult to ensure coaxiality between the output detection beam and the processing beam of the galvanometer scanning static laser welding equipment.

[0028] For the galvanometer scanning laser welding head 1, it integrates a detection optical path and a processing optical path, which can respectively transmit and scan the detection beam and the processing beam.

[0029] It should be noted that, for the "static welding" described in the preferred embodiment, it refers to the process where, during the welding of the corresponding weld seam, the workpiece 8 to be welded and the galvanometer scanning laser welding head 1 remain relatively stationary, and the processing beam and the detection beam complete the welding and detection of the corresponding weld seam in a scanning manner, respectively. Figure 2 As shown in the image.

[0030] Obviously, "static welding" does not mean that the positions of the processing beam and the detection beam do not change, nor does it mean that the galvanometer scanning laser welding head 1 itself cannot change its position relative to the workpiece 8 to be welded. In fact, during static scanning welding, the position of the galvanometer scanning laser welding head 1 relative to the workpiece 8 needs to be adjusted according to the position of different weld seams. However, during the processing beam scanning process, the relative position between the galvanometer scanning laser welding head 1 and the workpiece 8 remains unchanged, which is "static" welding.

[0031] More specifically, when the galvanometer scanning laser welding head 1 reaches the corresponding weld position, the processing position of the processing beam can be scanned and welded according to the galvanometer module inside the galvanometer scanning laser welding head 1.

[0032] Correspondingly, the opposite of "static welding" is "flying welding," which refers to the relative movement vector v between the workpiece to be welded and the galvanometer scanning laser welding head during the welding process of the corresponding weld seam. Through the relative movement between the "galvanometer scanning laser welding head 1" and the "workpiece to be welded 8," the welding of the weld points in the entire length of the weld seam is accurately completed.

[0033] During galvanometer scanning laser static welding, the processing beam reciprocates along the weld extension direction relative to its emission point 6, such as... Figure 2 As shown in the diagram, during the scanning process of the processing beam, the angle between the processing beam and the central axis of the galvanometer scanning laser welding head changes continuously, causing the optical path lengths of the two beams corresponding to different welding points to also change continuously. Moreover, due to the different wavelengths of the detection beam and the processing beam, their refractive indices will differ when passing through the same lens. This results in the detection beam and the processing beam having different exit points and exit angles after passing through the field lens of the galvanometer scanning laser welding head 1, thus causing an "optical path difference" between the detection beam and the processing beam.

[0034] For example, in Figure 2In the preferred embodiment shown, even if the detection beam and the processing beam are coaxially coupled in the optical path system, the detection beam exit point 7 and the processing beam exit point 6 may be different, corresponding to the existence of... Figure 2 The spacing D in the middle. At this time, two welding points A and B are selected on the workpiece 8 to be welded. The angles between the processing beams (i.e., the first processing beam 2 and the second processing beam 4) and the central axis of the welding head are different for the two welding points (the angle corresponding to point A is obviously larger). At this time, the spacing between the detection points of the first detection beam 3 and the second detection beam 5 emitted through the detection light emission point 7 corresponding to points A and B and the processing points corresponding to points A and B are different. Figure 2 In the equations d1 and d2, it is clear that d1 > d2 > D, where D is the distance between the detection light emission point 7 and the processing light emission point 6.

[0035] Obviously, for points A and B mentioned above, the optical path of the processing beam for point A is greater than that for point B. It is precisely because of the change in the optical path of the processing beam that the optical path difference between the detection beam and the corresponding processing beam will also be significantly different. The greater the optical path of the two beams, the more divergent the beams will be, that is, the greater the distance between them (i.e., d1 > d2). The difference between the distance between the two beams and the distance between the exit points of the two beams is also greater (i.e., d1 - D is greater than d2 - D).

[0036] Because of the aforementioned situation, when determining the position of the detection beam for different weld points, the distance between the detection beam and the processing beam cannot be simply fixed. Instead, the position of the detection beam should be determined for each weld point separately, and the position of the OCT penetration depth detection beam should be corrected.

[0037] Specifically, in the preferred embodiment, the OCT penetration depth detection beam position correction method for static welding includes the following process: S1: Determine the welding path and laser welding process; In actual setup, the process parameters related to the welding path should be determined according to the specific requirements of the project, and kept consistent with the production status.

[0038] Depending on the actual requirements, the welding path may contain one weld track or multiple weld tracks spaced apart from each other. This is related to the processing requirements of the workpiece 8 to be welded, and will not be elaborated here.

[0039] Obviously, in specific operations, it is necessary to determine the process parameters related to each weld trajectory. In a preferred embodiment, the process parameters related to the weld trajectory include the welding start point, end point, and the position distribution of the weld within the processing area of ​​the galvanometer scanning laser welding head 1; thereafter, laser welding process experiments are carried out based on the aforementioned conditions to solidify the welding process during production.

[0040] In actual operation, the welding process can be determined according to the workpiece welding requirements and weld trajectory. It includes at least the necessary welding parameters required for welding. In a preferred embodiment, the welding parameters include the focused spot diameter of the processing laser, the laser power, the welding speed (the movement speed of the galvanometer scanning laser welding head 1), the incident angle, etc.

[0041] In addition, if the laser processing requires oscillating welding during the welding process, the welding parameters also include the oscillation parameters of the laser processing, such as the oscillation pattern, oscillation amplitude, and oscillation frequency.

[0042] It's easy to understand why the laser welding process needs to be solidified at the beginning. This is because different welding processes correspond to slightly different keyhole positions for each weld point. Therefore, when performing position correction of the detection beam, it is necessary to first determine the welding path and welding process of the laser.

[0043] S2: Determine the position compensation coordinates of the detection beam for each weld point on each weld seam trajectory; Specifically, based on the information determined in S1, an OCT penetration test is conducted, and a keyhole position test of the weld pool is performed for each weld trajectory. The specific method is as follows: i points are uniformly selected as the research object on the weld trajectory. The coordinates of these points in the rectangular coordinate system of the processing plane of the galvanometer scanning laser welding head 1 are (X... i Y i ), where i is an integer.

[0044] For example, in such Figure 3 In the preferred embodiment shown, the rectangular coordinate system in the processing plane includes an orthogonally set processing coordinate system X-axis 10 and a processing coordinate system Y-axis 9. The research object can be further preferably the first weld point 12 (weld point M) and the second weld point 13 (weld point N) on the weld trajectory 11.

[0045] More specifically, the origin of the aforementioned Cartesian coordinate system is the center point of the processing area of ​​the galvanometer scanning laser welding head 1. Through welding experiments, the specific keyhole positions of these i weld points are accurately determined, and the relative coordinate values ​​of each keyhole with respect to its respective weld point are obtained. x i , y i The relative coordinate value is the position compensation coordinate of the detection beam.

[0046] It should be noted that the relative coordinate values ​​( x i , y iThe coordinate system is determined by constructing a compensation coordinate system with the corresponding weld point as the origin. The horizontal and vertical axes of this compensation coordinate system are parallel to the horizontal and vertical axes of the Cartesian coordinate system, respectively. In actual operation, the position of each weld point actually refers to the corresponding point of action of the processing beam on the weld trajectory.

[0047] S3: Perform fitting analysis on the compensation coordinates at each position to obtain a formula that conforms to the rule ( x = f ( x ), y = f ( y Based on this, a position correction file for the detection beam is generated, and the position correction of the OCT penetration detection beam under static welding is completed.

[0048] In practice, after obtaining the aforementioned formula ( x = f ( x ), y = f ( y After that, its accuracy can be verified. The preferred verification process is as follows: Select s new solder joints as the research object, and determine the coordinates (X, y, y) of each solder joint in the Cartesian coordinate system. s Y s ), where s is an integer; through welding experiments, accurately determine the specific keyhole positions of these s new weld points, and obtain the position compensation coordinates of each keyhole relative to each new weld point ( x s , y s Substitute the compensation coordinates of each position into the aforementioned formula ( x = f ( x ), y = f ( y In this process, we can verify the accuracy of the formula.

[0049] If the verification results are not accurate enough, the fitting formula is corrected by combining the aforementioned new solder joint position compensation coordinates; the verification and correction process is repeated until the formula ( x = f ( x ), y = f ( y The accuracy of the data meets the standards.

[0050] Furthermore, in actual setup, the position compensation coordinates of the detection beam for each weld point are preferably set on the weld trajectory of the corresponding weld point.

[0051] For example, in such Figure 3 In the preferred embodiment shown, for the first weld point 12 (weld point M) on the weld track, the position compensation coordinate of its detection beam corresponds to the coordinate of the first detection light irradiation point 14 in the plane rectangular coordinate system X1Y1; correspondingly, for the second weld point 13 (weld point N) on the weld track, the position compensation coordinate of its detection beam corresponds to the coordinate of the second detection light irradiation point 15 in the plane rectangular coordinate system X2Y2.

[0052] Based on the aforementioned position correction process of the OCT weld depth detection beam, the motion parameters of the detection beam corresponding to each weld point can be accurately obtained, and then the galvanometer scanning laser welding process in static welding state can be performed.

[0053] As another aspect of the preferred embodiment, a laser welding method based on the aforementioned OCT penetration depth detection beam position correction method is also provided, which includes the aforementioned steps S1 to S3, and further includes the following process: S4: Control the welding of the processing beam according to the welding process determined in S1, and determine the working position of the detection beam relative to the processing beam according to the position correction document determined in S3. Perform laser welding of each weld trajectory and simultaneously complete the penetration depth detection of each weld point.

[0054] It is understandable that the aforementioned position correction file cannot be universally applied to different workpieces 8 to be welded, galvanometer scanning laser welding head 1, or different weld seam trajectories, welding parameters, and other scenarios. It needs to be specifically determined for each application scenario. Once determined, batch welding of workpieces 8 to be welded under the same scenario can be completed.

[0055] The OCT penetration depth detection beam position correction method for static welding in this invention is simple in steps and convenient in operation. It can accurately compensate and correct the position of the detection beam relative to the position of the processing beam, providing conditions for accurate control of the detection beam position during static welding. It enables accurate measurement of laser welding penetration depth during static welding, ensuring the quality of static welding of workpieces, improving workpiece processing efficiency and quality, and has good economic benefits.

[0056] Those skilled in the art will readily understand that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An OCT penetration depth detection beam position correction method for static welding, characterized by, The method comprises the following steps: S1: determining a welding path and a laser welding process; S2: performing a molten pool keyhole position test on the weld track on the welding path to determine position compensation coordinates of the detection beam for at least some of the weld points on each weld track; S3: fitting analysis is performed on the position compensation coordinates to obtain a formula conforming to the rules x = f ( x ), y = f ( y )), and based on this, a position correction file of the detection beam is formed, and the position correction of the OCT penetration depth detection beam under static welding is completed.

2. The OCT weld penetration monitoring beam position correction method for static welding of claim 1, wherein, In S2, the molten pool keyhole position test performed on each weld track comprises the following process: Select i welding points evenly on the welding seam track as the research objects, determine the coordinates (X i , Y i ) of the welding points in the processing plane rectangular coordinate system, i is an integer; Through the welding test, the specific spoon hole positions of the i welding points are accurately found out, and the relative coordinate values of the respective spoon holes relative to the respective welding points are obtained x i , y i ), which are the position compensation coordinates of the detection light beam.

3. The OCT weld penetration monitoring beam position correction method for static welding of claim 2, wherein, Relative coordinate values ​​( x i , y i The coordinate system is determined by constructing a compensation coordinate system with its corresponding solder joint as the origin. The horizontal and vertical axes of this compensation coordinate system are parallel to the horizontal and vertical axes of the plane rectangular coordinate system, respectively.

4. The OCT weld penetration monitoring beam position correction method for static welding of claim 3, wherein, In S1, the welding path comprises one or more weld tracks; and / or, the welding process comprises at least necessary welding parameters required for welding, the welding parameters comprising a focused spot diameter of a processing laser, a laser power, a welding speed, and an incident angle.

5. The OCT weld penetration monitoring beam position correction method for static welding of claim 4, wherein, In the laser welding process of S1, the processing laser is a swing welding, and the welding parameters further comprise swing parameters of the processing laser, the swing parameters comprising at least a swing pattern, a swing amplitude, and a swing frequency.

6. The OCT penetration depth detection beam position correction method for static welding according to any one of claims 2 to 5, characterized in that, After the formula in S3 is completed, a verification process of the formula is further performed: Re-select s new welding points as the research object, determine the coordinates (X s , Y s ) of each welding point in the plane rectangular coordinate system, s is an integer; through the welding test, accurately find out the specific keyhole position of the s new welding points, get the position compensation coordinates of each keyhole relative to each new welding point x s , y s ); Substitute each position compensation coordinate into the foregoing formula x = f ( x ), y = f ( y ) in, and complete the verification of the formula. If the verification result shows that the formula is inaccurate, the fitting formula is modified in combination with the position compensation coordinates of each new welding spot; the verification and modification process is repeated until the accuracy of the formula (X, Y) meets the standard. x = f ( x ), y = f ( y )) meets the standard.

7. The OCT penetration depth detection beam position correction method for static welding according to any one of claims 1 to 5, characterized by, The position compensation coordinates of the detection beam of each weld point are located on the corresponding weld track.

8. A galvanometer scanning laser welding method for static welding, comprising the OCT melt depth detection beam position correction method for static welding according to any one of claims 1 to 7, characterized in that, The method further comprises the following steps: S4: performing welding control of the processing beam according to the welding process determined in S1, determining the working position of the detection beam relative to the processing beam according to the position correction file determined in S3, performing laser welding of each weld track, and simultaneously completing the penetration detection of each weld point.

Images