Pipe laser cutting method, device, equipment and storage medium for fitting curved surface

Abstract

The application provides a pipe laser cutting method and device for fitting a curved surface, equipment and a storage medium. The method is used for sampling points on the initial inner contour and the initial outer contour of the material shape on the pipe, obtaining a plurality of first inner contour scattered points and a plurality of first outer contour scattered points, taking each first inner contour scattered point as a reference, obtaining a tangent line of the first inner contour scattered point along a corresponding curve, extending the tangent line to the outer surface of the pipe to obtain a corresponding second outer contour scattered point, fitting all the second outer contour scattered points to obtain an optimized outer contour, and obtaining a target connecting line between each second outer contour scattered point and the corresponding first inner contour scattered point. The laser cutting program is executed by taking the optimized outer contour as a cutting track and taking the target connecting line as a cutting direction to perform laser cutting on the pipe. Thus, the cutting surface obtained after laser cutting can be as close as possible to the curved surface, and the effect of "minimum material removal" is achieved.

Description

Technical Field

[0001] One or more embodiments of the present invention relate to the field of laser cutting processing technology, and in particular to a method, apparatus, equipment and storage medium for laser cutting of tubular materials conforming to curved surfaces. Background Technology

[0002] In the field of metal cutting, the goal of certain cutting processes is to ensure that the surfaces of two workpieces fit together perfectly when they are joined. This ensures that the assembly parameters such as position, angle, and length are very precise and the assembly is very strong before welding and other assembly processes are performed.

[0003] However, since laser cutting works by using a laser beam to cut the material, the resulting cut surface in the thickness direction must be a plane (formed by linear movement). If, theoretically, a curved surface is required for a perfect fit, then laser cutting would never achieve a complete fit.

[0004] Currently, there is a lack of effective solutions to the above problems. Summary of the Invention

[0005] In view of this, one or more embodiments of the present invention provide a method, apparatus, device and storage medium for laser cutting of tubing conforming to curved surfaces.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] According to a first aspect of one or more embodiments of the present invention, a method for laser cutting a pipe with a conforming curved surface is provided, for cutting a curved cutting surface conforming to the curved surface on the pipe, the method comprising:

[0008] S1: Obtain the initial inner contour, initial outer contour, and initial cutting surface of the material removal shape of the pipe; wherein the material removal shape is drawn on the pipe according to the curved surface to be fitted.

[0009] S2: Take points on the initial inner contour and initial outer contour of the material removal shape to obtain a number of first inner contour scattered points and a number of first outer contour scattered points respectively; wherein each first inner contour scattered point corresponds to each first outer contour scattered point through a curve, and all the curves constitute the initial cutting surface.

[0010] S3: Using each of the first inner contour scatter points as a reference, obtain the tangent line of the first inner contour scatter point along the corresponding curve, and extend the tangent line to the outer surface of the pipe to obtain the corresponding second outer contour scatter point.

[0011] S4: Fit all the scatter points of the second outer contour to obtain the optimized outer contour;

[0012] S5: Obtain the target line connecting each second outer contour scatter point and the corresponding first inner contour scatter point, wherein the target line points to the axis of the pipe;

[0013] S6: Using the optimized outer contour as the cutting trajectory and the target line as the cutting direction, execute the laser cutting program to laser cut the pipe.

[0014] In one alternative implementation, the following further exists between S2 and S3:

[0015] S21: Determine the type of the local surface cutting surface between each first inner contour scatter point and the corresponding first outer contour scatter point, wherein the type of the local surface cutting surface includes concave surface and convex surface;

[0016] S22: If the local curved surface cutting surface is convex, then the first outer contour scatter point corresponding to the first inner contour scatter point is taken as the corresponding second outer contour scatter point; if the local curved surface cutting surface is concave, then proceed to S3; until all the second outer contour scatter points corresponding to the first inner contour scatter points are obtained, then proceed to S4.

[0017] In one alternative implementation, S21 specifically includes:

[0018] S211: Obtain the first line connecting each first inner contour point and the corresponding first outer contour point, and the local surface cutting surface between each first inner contour point and the corresponding first outer contour point.

[0019] S212: Determine the relationship between the first connecting line and the corresponding local curved surface cutting surface. If the first connecting line is located outside the local curved surface cutting surface, the type of the local curved surface cutting surface is concave. If the first connecting line is located inside the local curved surface cutting surface, the type of the local curved surface cutting surface is convex.

[0020] In one alternative implementation, S3 specifically includes:

[0021] S31: Using each first inner contour scatter point as a reference, obtain the tangent line of the first inner contour scatter point along the corresponding curve.

[0022] S32: Determine whether the angle between the tangent and the stretching direction of the pipe is greater than a preset angle; if yes, extend each first inner contour point to the outer surface of the pipe according to the preset angle to obtain the corresponding second outer contour point; if no, extend the tangent to the outer surface of the pipe to obtain the corresponding second outer contour point.

[0023] In one alternative implementation, the preset angle is the maximum mechanical swing angle of the laser tube cutter.

[0024] In one alternative implementation, the maximum swing angle of the machine is 45 degrees.

[0025] In one alternative implementation, the maximum mechanical swing angle is the maximum angle between the cutting head of the laser cutting equipment and the stretching direction of the tube.

[0026] According to a second aspect of one or more embodiments of the present invention, a tube laser cutting device conforming to a curved surface is provided, comprising an acquisition unit, a sampling unit, a determination unit, a fitting unit, a connecting unit, and a cutting unit; wherein:

[0027] The acquisition unit is used to acquire the initial inner contour, initial outer contour, and initial cutting surface of the material removal shape of the pipe; wherein the material removal shape is drawn on the pipe according to the curved surface to be fitted.

[0028] The sampling unit is used to sample the initial inner contour and initial outer contour of the material removal shape, and obtain a number of first inner contour scattered points and a number of first outer contour scattered points respectively; wherein each first inner contour scattered point corresponds to each first outer contour scattered point through a curve, and all the curves constitute the initial cutting surface.

[0029] The determining unit is used to obtain the tangent line of each first inner contour scatter point along the corresponding curve based on each first inner contour scatter point, and extend the tangent line to the outer surface of the pipe to obtain the corresponding second outer contour scatter point.

[0030] The fitting unit is used to fit all the second outer contour scatter points to obtain the optimized outer contour.

[0031] The connecting unit is used to obtain a target connecting line between each second outer contour scatter point and the corresponding first inner contour scatter point, wherein the target connecting line points to the axis of the pipe.

[0032] The cutting unit is used to perform laser cutting on the pipe by using the optimized outer contour as the cutting trajectory and the target line as the cutting direction.

[0033] According to a third aspect of one or more embodiments of the present invention, an electronic device is provided, comprising:

[0034] processor;

[0035] And, memory used to store processor-executable instructions;

[0036] The processor implements the steps in the method described in the first aspect by running the executable instructions.

[0037] According to a fourth aspect of one or more embodiments of the present invention, a computer-readable storage medium is provided having a computer program stored thereon, which, when executed by a processor, implements the steps of the method described in the first aspect above.

[0038] As can be seen from the above description, in this invention, points are collected on the initial inner and outer contours of the material removal shape on the pipe to obtain several first inner contour points and several first outer contour points. Using each first inner contour point as a reference, the tangent line of that first inner contour point along the corresponding curve is obtained, and this tangent line is extended to the outer surface of the pipe to obtain the corresponding second outer contour point. By fitting all the second outer contour points, an optimized outer contour is obtained, and a target connection line between each second outer contour point and the corresponding first inner contour point is obtained. Using the optimized outer contour as the cutting trajectory and the target connection line as the cutting direction, a laser cutting program is executed to laser cut the pipe. Thus, while respecting the objective properties of laser cutting, the cut surface obtained after laser cutting can fit as closely as possible to the curved surface, achieving the effect of "minimal material removal". Attached Figure Description

[0039] Figure 1 This is a schematic diagram of a T-shaped splicing of round tubes;

[0040] Figure 2 This is a schematic diagram of the saddle-shaped opening that needs to be cut into the pipe for T-shaped splicing of round pipes;

[0041] Figure 3 This is a schematic diagram showing the correspondence between the inner and outer points of the pipe.

[0042] Figure 4 This is a schematic diagram of the cross-sectional outline of a saddle-shaped pipe.

[0043] Figure 5 This is a schematic diagram of a conventional cutting trajectory based on the outer contour.

[0044] Figure 6 This is a schematic diagram of the assembly of workpieces after being cut along the conventional outer contour.

[0045] Figure 7 This is a schematic diagram of an existing cutting trajectory using the inner contour;

[0046] Figure 8 This is a schematic diagram of the assembly of workpieces after cutting along the inner contour;

[0047] Figure 9 A flowchart of a method for laser cutting tubing with a conforming curved surface, provided as an exemplary embodiment of the present invention;

[0048] Figure 10This is a schematic diagram illustrating the determination of the second outer contour scatter points according to an exemplary embodiment of the present invention;

[0049] Figure 11 This is a schematic diagram illustrating the determination of an optimized outer contour according to an exemplary embodiment of the present invention;

[0050] Figure 12 This is a schematic diagram illustrating a T-shaped splicing of a pipe obtained by the pipe laser cutting method of the present invention using the conforming curved surface of the present invention with another pipe, as shown in an exemplary embodiment of the present invention.

[0051] Figure 13 This is a schematic diagram illustrating the angle between the tangent and the stretching direction of the tube, as shown in an exemplary embodiment of the present invention.

[0052] Figure 14 This is a schematic diagram illustrating convex and concave surfaces in an exemplary embodiment of the present invention;

[0053] Figure 15 This is a schematic diagram of the structure of an electronic device for laser cutting tubing that conforms to a curved surface, provided in an exemplary embodiment.

[0054] Figure 16 This is a block diagram of a tubing laser cutting apparatus for conforming to curved surfaces, provided in an exemplary embodiment. Detailed Implementation

[0055] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with one or more embodiments of the present invention. Rather, they are merely examples of apparatuses and methods consistent with some aspects of one or more embodiments of the present invention as detailed in the appended claims.

[0056] It should be noted that the steps of the corresponding methods in other embodiments are not necessarily performed in the order shown and described in this invention. In some other embodiments, the methods may include more or fewer steps than those described in this invention. Furthermore, a single step described in this invention may be broken down into multiple steps in other embodiments; and multiple steps described in this invention may be combined into a single step in other embodiments.

[0057] Prior to submitting this invention, the applicant conducted extensive research on laser cutting of pipes, identified corresponding problems in this process, and, based on these problems, conducted further research and exploration, ultimately arriving at the solution presented in this application. Details are as follows:

[0058] In the field of metal cutting, curved surfaces are sometimes necessary for a proper fit, such as... Figure 1 As shown, when two circular tube workpieces (such as the first tube 10 and the second tube 20) are to be joined in a T-shape, their mating surfaces must be curved, thus requiring a cutout on the second tube 20. Figure 2 The shape A of the saddle opening is shown.

[0059] For the saddle-shaped opening A on the second pipe 20, the outer edge of the pipe surface is the outer contour, and the inner edge of the pipe surface is the inner contour. The contour can be considered to be composed of countless points, and there are corresponding rules between the inner points constituting the inner contour and the outer points constituting the outer contour. Typically, the line connecting the inner and outer points points towards the pipe axis. Figure 3 The correspondence between 16 interior points and exterior points is given.

[0060] For pipes with a saddle-shaped opening, the surface corresponding to the pipe's thickness direction is curved. Figure 4 Let's illustrate this from the most obvious angle of the pipe: Curve d represents the cross-sectional profile of the saddle-mouth pipe. Dashed line 22 represents the inner surface of the pipe, and the point where it intersects with the saddle mouth is the inner point at that location. Solid line 21 represents the outer surface of the pipe, and the point where it intersects with the saddle mouth is the outer point at that location. From this angle, only two sets of inner and outer points are visible; in reality, countless inner and outer points form the inner and outer contours. It can be seen that these corresponding inner and outer points are connected by curves, indicating that the corresponding cut surface should be curved. While the curves between each set of inner and outer contours are not entirely the same and vary according to certain rules, the consistent rule of connecting inner and outer points by curves and the overall surface being a curved cut surface remains the same.

[0061] Since the laser beam is straight, according to conventional laser cutting methods, the laser will use the outer contour as the cutting trajectory and the line connecting the inner and outer points as the cutting direction, resulting in a shape like... Figure 5 As shown in the figure, plane d causes the cut surface to protrude beyond the required curved surface, leading to splicing interference. This results in gaps between the two pipes, causing negative effects such as misalignment and instability during assembly. Figure 6 As shown.

[0062] To solve the above problems, one approach is to grind the cut surface; however, this method requires a large amount of manpower, is both time-consuming and inaccurate. For example... Figure 7 As shown, another method involves extending the inner point vertically outward to obtain new outer points. The set of these new outer points forms a new outer contour line, which serves as the cutting trajectory. Laser cutting is performed with the vertical direction as the cutting direction. The effect of this method is illustrated in the image below. Figure 8 As shown, although it can ensure that the splicing does not interfere, too much material is cut off, resulting in large gaps that need to be filled by welding. Welding is very difficult for large gaps.

[0063] In view of this, the present invention provides a method for laser cutting of tubular materials conforming to curved surfaces, applicable to various electronic devices; for example, the method can be directly applied to equipment that performs workpiece cutting, or it can be applied to a general computer and then output relevant toolpaths for reference by equipment that performs workpiece cutting, and the present invention does not impose any specific limitations on this.

[0064] Please refer to Figure 9 , Figure 9 The diagram shows a flowchart of a method for laser cutting tubing with a conforming curved surface, provided by an exemplary embodiment of the present invention.

[0065] The laser cutting method for the tube conforming to the curved surface may include the following specific steps S1-S6:

[0066] Step S1: Obtain the initial inner contour, initial outer contour, and initial cutting surface of the material removal shape of the pipe; wherein the material removal shape is drawn on the pipe according to the curved surface to be fitted.

[0067] In this embodiment, the material removal shape is first drawn on the pipe according to the curved surface to be adhered to, where the material removal shape is, for example, a saddle-shaped opening. Of course, the material removal shape will vary depending on the curved surface to be adhered to. This invention does not limit the specific material removal shape; as long as the cutting surface of the material removal shape is curved, it is within the scope of protection of this invention. Specifically, the material removal shape can be drawn using software, such as CAD drawing software.

[0068] Based on the material removal shape, the initial inner contour, initial outer contour, and initial cutting surface of the pipe's material removal shape are obtained. The initial inner contour refers to the inner surface edge of the pipe corresponding to the material removal shape, the initial outer contour refers to the outer surface edge of the pipe corresponding to the material removal shape, and the initial cutting surface refers to the surface connecting the initial inner contour and the initial outer contour; this surface is curved.

[0069] Step S2: Sample points on the initial inner contour and initial outer contour of the material removal shape to obtain several first inner contour scattered points and several first outer contour scattered points respectively; wherein each first inner contour scattered point corresponds to each first outer contour scattered point through a curve, and all the curves constitute the initial cutting surface.

[0070] Specifically, such as Figure 10 As shown, C1 is the first inner contour scatter point, B1 is the first outer contour scatter point, and the first inner contour scatter point C1 corresponds to the first outer contour scatter point B1 through a curve e.

[0071] Step S3: Using each first inner contour scatter point as a reference, obtain the tangent line of the first inner contour scatter point along the corresponding curve, and extend the tangent line to the outer surface of the pipe to obtain the corresponding second outer contour scatter point.

[0072] Specifically, such as Figure 10 As shown, taking the first inner contour scatter point C1 as the reference, the tangent f of the first inner contour scatter point C1 along the corresponding curve e is obtained, and the tangent f is extended to the outer surface of the pipe to obtain the corresponding second outer contour scatter point E1.

[0073] Step S4: Fit all the scatter points of the second outer contour to obtain the optimized outer contour.

[0074] like Figure 11 As shown, taking 16 first inner contour scatter points as an example, after obtaining the second outer contour scatter points corresponding to all 16 first inner contour scatter points using the aforementioned method, all second outer contour scatter points are fitted to obtain the optimized outer contour.

[0075] Of course, the number of scattered points of the first inner contour can also be other values. This invention does not impose specific restrictions on this, and the more scattered points of the first inner contour, the higher the accuracy can be.

[0076] Step S5: Obtain the target line connecting each second outer contour scatter point and the corresponding first inner contour scatter point, wherein the target line points to the axis of the pipe;

[0077] Step S6: Using the optimized outer contour as the cutting trajectory and the target line as the cutting direction, execute the laser cutting program to laser cut the pipe.

[0078] For laser cutting, as long as the cutting trajectory and cutting direction are obtained, the laser cutting program can be executed to laser cut the pipe.

[0079] Using the method provided in this embodiment of the invention, the splicing effect between the cut second pipe 20 and the first pipe 10 is as follows: Figure 12 As shown, the curved surfaces of the two pipes fit together well with minimal gaps. Furthermore, compared to cutting directly along the inner contour line, this method achieves the effect of "minimal material removal."

[0080] As a preferred embodiment, in order to further save materials, the present invention may further include the following steps between step S2 and step S3:

[0081] S21: Determine the type of the local surface cutting surface between each first inner contour scatter point and the corresponding first outer contour scatter point, wherein the type of the local surface cutting surface includes concave surface and convex surface;

[0082] S22: If the local curved surface cutting surface is convex, then the first outer contour scatter point corresponding to the first inner contour scatter point is taken as the corresponding second outer contour scatter point; if the local curved surface cutting surface is concave, then proceed to S3; until all the second outer contour scatter points corresponding to the first inner contour scatter points are obtained, then proceed to S4.

[0083] Among them, such as Figure 13 As shown, the type of local surface cutting surface between each first inner contour scatter point and the corresponding first outer contour scatter point is determined, specifically including:

[0084] S211: Obtain the first line g between each first inner contour scatter point C1 and the corresponding first outer contour scatter point B1, and the local curved surface cutting surface h between each first inner contour scatter point C1 and the corresponding first outer contour scatter point B1.

[0085] S212: Determine the relationship between the first connecting line g and the corresponding local curved surface cutting surface h. If the first connecting line g is located outside the local curved surface cutting surface h, then the type of the local curved surface cutting surface h is a concave surface (e.g., Figure 13 (The left side portion); if the first connecting line is located within the local curved surface cutting surface, then the type of the local curved surface cutting surface is a convex surface (e.g., Figure 13 (The right side portion).

[0086] In this context, the first connecting line g is located outside the local curved surface cutting surface h. This can be understood as the first connecting line g protruding from the local curved surface cutting surface h, meaning that more pipe material is cut off using the local curved surface cutting surface h as the cutting surface than using the first connecting line g as the cutting surface. Conversely, the convex surface is understood in the opposite way.

[0087] For convex curved surfaces, the rule for minimum material removal is: use the outer contour as the cutting trajectory and the line connecting the inner and outer points as the cutting direction.

[0088] This invention distinguishes between convex and concave surfaces and uses different cutting methods, thereby achieving the most economical material usage while maintaining a good fit to curved surfaces.

[0089] As a further preferred embodiment, the present invention considers the limitation of the maximum mechanical swing angle, which refers to the maximum angle between the cutting head of the laser cutting equipment and the stretching direction of the tube. Due to limitations in actual equipment, this maximum mechanical swing angle is usually limited. If this maximum swing angle is exceeded, it cannot be achieved in practice. Based on this, as... Figure 14 As shown, step S3 in the preferred embodiment of the present invention further includes:

[0090] S31: Using each first inner contour scatter point C1 as a reference, obtain the tangent line of the first inner contour scatter point C1 along the corresponding curve;

[0091] S32: Determine whether the angle α between the tangent and the stretching direction of the pipe is greater than a preset angle; if yes, extend each first inner contour point C1 to the outer surface of the pipe according to the preset angle to obtain the corresponding second outer contour point; if no, extend the tangent to the outer surface of the pipe to obtain the corresponding second outer contour point E1.

[0092] The preset angle is the maximum mechanical swing angle. Taking a maximum mechanical swing angle of 45 degrees as an example, if the angle α between the tangent and the stretching direction of the pipe is greater than 45 degrees, the first inner contour point C1 is extended to the outer surface of the pipe at a 45-degree angle to obtain the corresponding second outer contour point; if the angle α between the tangent and the stretching direction of the pipe is less than or equal to 45 degrees, the tangent is extended to the outer surface of the pipe to obtain the corresponding second outer contour point E1.

[0093] This preferred approach takes into account the limitations of actual equipment, thereby enabling the method provided by the present invention to maximize the requirements of precise assembly and small gaps.

[0094] Figure 15 This is a schematic diagram of the structure of an electronic device for laser cutting tubing that conforms to a curved surface, provided by an exemplary embodiment of the present invention. Please refer to... Figure 15 At the hardware level, the device includes a processor 602, an internal bus 604, a network interface 606, memory 608, and non-volatile memory 610, and may also include other hardware required for business operations. One or more embodiments of the present invention can be implemented in software, for example, the processor 602 reads the corresponding computer program from the non-volatile memory 610 into memory 608 and then runs it. Of course, in addition to software implementation, one or more embodiments of the present invention do not exclude other implementation methods, such as logic devices or a combination of hardware and software, etc. That is to say, the execution subject of the following processing flow is not limited to each logic unit, but can also be hardware or logic devices.

[0095] Please refer to Figure 16 , Figure 16 The diagram shown is a block diagram of a toolpath optimization device for beveling in a laser cutting apparatus for pipes conforming to curved surfaces, provided by an exemplary embodiment of the present invention. This toolpath optimization device for beveling in a laser cutting apparatus for pipes conforming to curved surfaces can be applied to… Figure 15 The electronic device shown implements the technical solution of the present invention. The tubular laser cutting device for conforming to curved surfaces includes an acquisition unit 101, a sampling unit 102, a determination unit 103, a fitting unit 104, a connection unit 105, and a cutting unit 106; wherein:

[0096] The acquisition unit 101 is used to acquire the initial inner contour, initial outer contour and initial cutting surface of the material removal shape of the pipe; wherein the material removal shape is drawn on the pipe according to the curved surface to be fitted.

[0097] The sampling unit 102 is used to sample the initial inner contour and initial outer contour of the material removal shape to obtain a number of first inner contour scattered points and a number of first outer contour scattered points respectively; wherein each first inner contour scattered point corresponds to each first outer contour scattered point through a curve, and all the curves constitute the initial cutting surface.

[0098] The determining unit 103 is used to obtain the tangent line of each first inner contour scatter point along the corresponding curve based on each first inner contour scatter point, and extend the tangent line to the outer surface of the pipe to obtain the corresponding second outer contour scatter point.

[0099] The fitting unit 104 is used to fit all the second outer contour scatter points to obtain the optimized outer contour.

[0100] The connecting unit 105 is used to obtain a target connection between each second outer contour scatter point and the corresponding first inner contour scatter point, wherein the target connection points to the axis of the pipe.

[0101] The cutting unit 106 is used to perform laser cutting on the pipe by using the optimized outer contour as the cutting trajectory and the target line as the cutting direction to execute a laser cutting program.

[0102] The systems, devices, modules, or units described in the above embodiments can be implemented by computer chips or entities, or by products with certain functions. A typical implementation device is a computer, which can take the form of a personal computer, laptop computer, cellular phone, camera phone, smartphone, personal digital assistant, media player, navigation device, email sending and receiving device, game console, tablet computer, wearable device, or any combination of these devices.

[0103] In a typical configuration, a computer includes one or more processors (CPU), input / output interfaces, network interfaces, and memory.

[0104] Memory may include non-persistent storage in computer-readable media, such as random access memory (RAM) and / or non-volatile memory, such as read-only memory (ROM) or flash RAM. Memory is an example of computer-readable media.

[0105] Computer-readable media, including both permanent and non-permanent, removable and non-removable media, can store information using any method or technology. Information can be computer-readable instructions, data structures, modules of programs, or other data. Examples of computer storage media include, but are not limited to, phase-change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technologies, CD-ROM, digital versatile optical disc (DVD) or other optical storage, magnetic tape, disk storage, quantum memory, graphene-based storage media or other magnetic storage devices, or any other non-transferable medium that can be used to store information accessible by a computing device. As defined herein, computer-readable media does not include transient computer-readable media, such as modulated data signals and carrier waves.

[0106] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0107] The foregoing has described specific embodiments of the invention. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps described in the claims may be performed in a different order than that shown in the embodiments and may still achieve the desired results. Furthermore, the processes depicted in the drawings do not necessarily require the specific or sequential order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0108] The terminology used in one or more embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to limit the invention. The singular forms “a,” “the,” and “the” used in one or more embodiments of the invention and in the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any or all possible combinations of one or more associated listed items.

[0109] It should be understood that although the terms first, second, third, etc., may be used to describe various information in one or more embodiments of the present invention, such information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, first information may also be referred to as second information without departing from the scope of one or more embodiments of the present invention, and similarly, second information may also be referred to as first information. Depending on the context, the word "if" as used herein may be interpreted as "when," "when," or "in response to a determination."

[0110] The above description is merely a preferred embodiment of one or more embodiments of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of one or more embodiments of the present invention should be included within the protection scope of one or more embodiments of the present invention.

Claims

1. A method for laser cutting tubing with a conforming curved surface, used to cut a curved cutting surface conforming to the curved surface on the tubing, characterized in that, The method includes: S1: Obtain the initial inner contour, initial outer contour, and initial cutting surface of the material removal shape of the pipe; wherein the material removal shape is drawn on the pipe according to the curved surface to be fitted. S2: Take points on the initial inner contour and initial outer contour of the material removal shape to obtain a number of first inner contour scattered points and a number of first outer contour scattered points respectively; wherein each first inner contour scattered point corresponds to each first outer contour scattered point through a curve, and all the curves constitute the initial cutting surface. S3: Using each of the first inner contour scatter points as a reference, obtain the tangent line of the first inner contour scatter point along the corresponding curve, and extend the tangent line to the outer surface of the pipe to obtain the corresponding second outer contour scatter point. S4: Fit all the scatter points of the second outer contour to obtain the optimized outer contour; S5: Obtain the target line connecting each second outer contour scatter point and the corresponding first inner contour scatter point, wherein the target line points to the axis of the pipe; S6: Using the optimized outer contour as the cutting trajectory and the target connecting line as the cutting direction, execute the laser cutting program to laser cut the pipe. Between S2 and S3, there is also: S21: Determine the type of the local surface cutting surface between each first inner contour scatter point and the corresponding first outer contour scatter point, wherein the type of the local surface cutting surface includes concave surface and convex surface; S22: If the local curved surface cutting surface is convex, then the first outer contour scatter point corresponding to the first inner contour scatter point is taken as the corresponding second outer contour scatter point; if the local curved surface cutting surface is concave, then proceed to S3; until all the second outer contour scatter points corresponding to the first inner contour scatter points are obtained, then proceed to S4.

2. The method for laser cutting tubing with a conforming curved surface according to claim 1, characterized in that, S21 specifically includes: S211: Obtain the first line connecting each first inner contour point and the corresponding first outer contour point, and the local surface cutting surface between each first inner contour point and the corresponding first outer contour point. S212: Determine the relationship between the first connecting line and the corresponding local curved surface cutting surface. If the first connecting line is located outside the local curved surface cutting surface, the type of the local curved surface cutting surface is concave. If the first connecting line is located inside the local curved surface cutting surface, the type of the local curved surface cutting surface is convex.

3. The method for laser cutting tubing with a conforming curved surface according to claim 1 or 2, characterized in that, S3 specifically includes: S31: Using each first inner contour scatter point as a reference, obtain the tangent line of the first inner contour scatter point along the corresponding curve. S32: Determine whether the angle between the tangent and the stretching direction of the pipe is greater than a preset angle; if yes, extend each first inner contour point to the outer surface of the pipe according to the preset angle to obtain the corresponding second outer contour point; if no, extend the tangent to the outer surface of the pipe to obtain the corresponding second outer contour point.

4. The method for laser cutting tubing with a conforming curved surface according to claim 3, characterized in that, The preset angle is the maximum mechanical swing angle in the laser tube cutting machine.

5. The method for laser cutting tubing with a conforming curved surface according to claim 4, characterized in that, The maximum swing angle of the machine is 45 degrees.

6. The method for laser cutting tubing with conforming curved surfaces according to claim 5, characterized in that, The maximum mechanical swing angle is the maximum angle between the cutting head of the laser cutting equipment and the stretching direction of the pipe.

7. A laser cutting device for tubing that conforms to curved surfaces, characterized in that, A method for laser cutting tubular materials with conforming curved surfaces as described in any one of claims 1 to 6, wherein the tubular laser cutting device for conforming curved surfaces comprises an acquisition unit, a sampling unit, a determination unit, a fitting unit, a connection unit, and a cutting unit; wherein: The acquisition unit is used to acquire the initial inner contour, initial outer contour, and initial cutting surface of the material removal shape of the pipe; wherein the material removal shape is drawn on the pipe according to the curved surface to be fitted. The sampling unit is used to sample the initial inner contour and initial outer contour of the material removal shape, and obtain a number of first inner contour scattered points and a number of first outer contour scattered points respectively; wherein each first inner contour scattered point corresponds to each first outer contour scattered point through a curve, and all the curves constitute the initial cutting surface. The determining unit is used to obtain the tangent line of each first inner contour scatter point along the corresponding curve based on each first inner contour scatter point, and extend the tangent line to the outer surface of the pipe to obtain the corresponding second outer contour scatter point. The fitting unit is used to fit all the second outer contour scatter points to obtain the optimized outer contour. The connecting unit is used to obtain a target connecting line between each second outer contour scatter point and the corresponding first inner contour scatter point, wherein the target connecting line points to the axis of the pipe. The cutting unit is used to perform laser cutting on the pipe by using the optimized outer contour as the cutting trajectory and the target line as the cutting direction.

8. An electronic device, characterized in that, include: processor; And, memory used to store processor-executable instructions; The processor implements the steps of the method according to any one of claims 1-6 by running the executable instructions.

9. A computer-readable storage medium, characterized in that, It stores a computer program that, when executed by a processor, implements the steps of the method according to any one of claims 1-6.

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