Method for finishing large special-shaped curved steel member

Abstract

The present application belongs to the technical field of steel member processing, and discloses a large steel member special-shaped curved surface finishing method, which obtains workpiece contour parameters, uses three-dimensional printing technology to make an L-shaped profiling template, and provides accurate starting reference; the connecting surface is connected with the adjacent side surface of the workpiece in alignment, so that spatial positioning is realized; the L-shaped structure only retains necessary reference and plane support, thereby reducing the amount of printing material and facilitating disassembly, assembly and adjustment. The adjustable connecting piece connects the profiling template and the workpiece, preliminary alignment and positioning are realized, local deviation is compensated by adjusting the angle, and the continuous transition between the finishing reference surface and the curved surface to be finished is ensured. In combination with the step-by-step process of first detecting local recesses, then welding and then polishing, the curved surface gradually approaches the predetermined shape, and the local correction amount is effectively controlled. The finished area is taken as a new reference surface, and the remaining areas to be finished are gradually finished, the local precision and overall continuity are considered, and the overall consistency and controllable tolerance of the large and complex special-shaped member are ensured.

Description

Technical Field

[0001] This invention relates to the field of steel component processing technology, and in particular to a method for trimming irregular curved surfaces of large steel components. Background Technology

[0002] Large irregular curved steel components are prone to deformation and errors during welding, hot forming and assembly. Deviations in the curved surface contour will affect the smoothness of the appearance and the quality of structural assembly. Therefore, it is necessary to correct and refine the curved surface shape through subsequent finishing processes.

[0003] However, several limitations remain in the actual finishing and correction of large, irregularly shaped curved steel components. Firstly, while conventional milling machines offer high precision, their processing range and load-bearing capacity are limited by equipment specifications, making them suitable only for precision cutting of small and medium-sized components. This fails to meet the overall finishing needs of large, complex curved surfaces, and the high cost of equipment purchase and maintenance contradicts the requirement for low-cost processing in large component finishing. Secondly, the planes of large, irregularly shaped curved steel components are mostly free-form structures, lacking flat, regular geometric reference surfaces. Manual finishing makes it difficult to determine a uniform processing direction and depth, relying entirely on worker experience. In this situation, corners and transition areas are prone to over-grinding or under-finishing, potentially damaging the original surface shape and leaving residual local defects, making it difficult to balance appearance smoothness and geometric accuracy. Furthermore, differences in experience and judgment standards among workers mean that even multiple operations by the same worker cannot guarantee consistent finishing results, leading to inconsistent appearance quality within the same batch of components, failing to meet the requirements of standardized quality for large-scale production. Meanwhile, manual finishing is time-consuming, labor-intensive, and inefficient, making it unsuitable for mass production of large steel components. Summary of the Invention

[0004] The purpose of this invention is to solve or at least alleviate some or all of the aforementioned problems. Therefore, the purpose of this invention is to provide a method for trimming irregular curved surfaces of large steel components, so as to achieve high-precision trimming and uniform quality control of the curved surface morphology of large components while meeting the requirements of low-cost processing; effectively avoid experience deviations in manual operation, ensure the continuity and smooth connection of the morphology between local corrections and the overall curved surface, significantly improve trimming accuracy, consistency, and work efficiency, while expanding the scope of application of the process and improving operational safety.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] A method for trimming irregular curved surfaces of large steel components includes the following steps:

[0007] S1: Obtain the three-dimensional contour parameters of the area to be repaired on the workpiece, and make a contour template using three-dimensional printing technology based on the contour parameters. The contour template includes a first plane and a second plane that intersect along the edge. The two planes enclose an L-shaped structure with a cross section. The curvature of the first plane matches the target curvature of the area to be repaired.

[0008] S2: The second plane is adjusted and fixedly connected to the adjacent side of the area to be repaired by an adjustable connecting component. The adjustable connecting component is adjusted so that the first plane is in close and continuous contact with the area to be repaired in terms of spatial position and angle, forming an extended plane of the area to be repaired, so that the contour template is initially aligned and positioned with the edge of the workpiece.

[0009] S3: Using the first plane as the repair reference plane, detect the position and depth of the depression in the area to be repaired on the first plane, detect the position and depth of the depression in the area to be repaired along the first plane, first fill the detected depression by welding, and then mechanically grind the welded filling layer with the first plane as the reference until the area to be repaired is consistent with the curvature of the first plane within the predetermined tolerance range and achieves a continuous transition.

[0010] S4: Using the repaired area as the new repair reference surface, detect the location and depth of the depression in the adjacent area, weld and fill the detected depression, and mechanically grind the weld and fill layer until the adjacent area is consistent with the curvature of the new repair reference surface within the predetermined tolerance range and achieves a continuous transition.

[0011] S5: Repeat step S4 until the overall surface trimming of the workpiece is completed.

[0012] In some alternative embodiments, the contour template further includes a plurality of reinforcing ribs, each of which is connected at one end to the first plane and at the other end to the second plane.

[0013] In some optional embodiments, the adjustable connection component in step S2 includes a magnetic connector and an angle adjustment component. One end of the magnetic connector is detachably connected to the adjacent side by magnetic force, and the other end is threadedly connected to the second plane by a bolt. The angle adjustment component is installed between the magnetic connector and the second plane to adjust the installation angle of the second plane relative to the adjacent side.

[0014] In some alternative embodiments, the angle adjustment assembly includes a wedge block with a waist hole along its longitudinal direction. The bolt passes through the second plane in sequence, and the waist hole of the wedge block is threadedly connected to the magnetic connector. The wedge block is slidable relative to the magnetic connector along the long axis of the waist hole.

[0015] In some alternative embodiments, the angle adjustment assembly further includes a spherical washer and a conical washer. The bolt includes a nut and a screw. The conical washer is sandwiched between the nut and the second plane. The spherical washer is sleeved on the screw and located between the nut and the conical washer. The spherical washer and the conical washer are connected to each other to compensate for the angle deviation of the second plane.

[0016] In some optional embodiments, in step S3, a flatness testing instrument is used to detect the location and depth of the depression in the area to be repaired, with the first plane as the detection reference.

[0017] In some alternative embodiments, in step S3, the detected depression is filled by welding, and the height of the weld filling layer is slightly higher than the trimming reference surface.

[0018] In some optional embodiments, in step S3, the weld filler layer is mechanically ground by a mechanical grinding assembly, which includes a height adjustment component and a grinding component. The height adjustment component is located on the dressing reference surface and is installed on the bottom of the grinding component. The two are fixedly connected to adjust the relative height between the grinding end of the grinding component and the area to be dressed.

[0019] In some alternative embodiments, the grinding end of the workpiece is provided with a sanding roller sleeve.

[0020] In some optional embodiments, the workpiece surface is divided into several grid regions, and the first plane is used as the first trimming reference surface to detect and trim the corresponding grid regions; then, the adjacent grid regions are used as the trimmed area as the trimming reference surface to sequentially complete the detection and trimming of the entire curved surface of the workpiece.

[0021] The beneficial effects of this invention are:

[0022] This invention provides a method for trimming irregular curved surfaces of large steel components. By acquiring the workpiece contour parameters, an L-shaped contouring template is fabricated using 3D printing technology. The template consists of a first plane and a second plane intersecting along their edges. These two planes can serve as a reference plane and a connecting plane, respectively. The curvature of the reference plane is aligned with the target curvature, forming an extended surface of the area to be trimmed, providing a precise starting reference. The connecting plane can be aligned and connected with adjacent sides of the area to be trimmed on the workpiece to achieve spatial positioning. The L-shaped structure retains only the necessary reference and planar support, reducing the amount of printing material used, providing a natural and stable physical reference, and facilitating disassembly and adjustment. Thus, while ensuring positioning accuracy, the fabrication cost of the contouring template is effectively reduced.

[0023] The second plane of the contour template is detachably and fixedly connected to the adjacent side of the area to be repaired via an adjustable connector, achieving initial alignment and positioning between the template and the workpiece edge. If there is unevenness between the adjacent sides, causing the first plane to form an angle with the area to be repaired, the template can be precisely spatially corrected by adjusting the connector to compensate for local deviations. This ensures a continuous transition between the repair reference plane and the surface to be repaired, improving repair accuracy and repeatability, achieving high precision in initial positioning, thus ensuring local repair accuracy and ensuring continuous connection with the overall surface. This allows the initial repair area to smoothly fit with the target surface, avoiding errors caused by differences in human experience.

[0024] After the template is accurately installed, a step-by-step process is employed: first, precise detection of local depressions in the area to be repaired; then, welding and repair; and finally, grinding. This process gradually brings the curved surface closer to the predetermined shape, effectively controlling the amount of local correction and avoiding over-grinding or under-repair, while ensuring a smooth transition of the overall curved surface. Subsequently, the repaired area is used as a new reference surface to gradually repair the remaining areas to be repaired, achieving a balance between local precision and overall continuity, and ensuring the overall consistency and controllable tolerances of large, complex, irregularly shaped components.

[0025] This method has a clear process, reduces rework, reduces reliance on operator experience, improves trimming efficiency and accuracy, and reduces processing costs; at the same time, the stable fixation of the contour template avoids the risk of operational displacement, achieving efficient and safe operation. Attached Figure Description

[0026] Figure 1 This is a flowchart of the method for trimming irregular curved surfaces of large steel components in this invention;

[0027] Figure 2 This is an assembly drawing of the contour template and the workpiece in this invention;

[0028] Figure 3 This is a front view of the alignment template and workpiece assembly in this invention;

[0029] Figure 4This is a schematic diagram of the wedge block structure of the angle adjustment component in this invention;

[0030] Figure 5 This is a schematic diagram of flatness detection in this invention;

[0031] Figure 6 This is a schematic diagram of welding repair in this invention;

[0032] Figure 7 This is a schematic diagram of mechanical grinding in this invention.

[0033] In the picture:

[0034] 100. Workpiece;

[0035] 1. Contouring template; 11. First plane; 12. Second plane; 13. Reinforcing rib; 2. Adjustable connecting assembly; 21. Magnetic connector; 22. Angle adjustment assembly; 221. Wedge block; 222. Waist hole; 223. Spherical washer; 224. Conical washer; 23. Bolt; 3. Weld filler layer; 4. Flatness measuring instrument; 5. Mechanical grinding assembly; 51. Height adjustment component; 52. Grinding part; 53. Sanding roller sleeve; 6. Recessed area. Detailed Implementation

[0036] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar components or components having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0037] In this invention, the terms "comprising," "including," "having," or any other variations thereof are intended to cover a 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 that element.

[0038] In this invention, the term "and / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three cases: A alone, A and B simultaneously, and B alone. Additionally, in this invention, the character " / " generally indicates that the preceding and following related objects have an "and / or" relationship.

[0039] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," "fixed," "combined," "coupled," and "installed" should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection; a direct connection or an indirect connection via an intermediate medium; or the internal communication of two components or the interaction between two components. As examples, a direct connection refers to two parts or components being connected together without the need for an intermediate medium, while an indirect connection refers to two parts or components each being connected to at least one intermediate medium, with the connection achieved through the intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances. Furthermore, "connected" and "coupled" are not limited to physical or mechanical connections or couplings, but can also include electrical connections or couplings.

[0040] In this invention, those skilled in the art will understand that relative terms (e.g., “about,” “approximately,” “basically,” etc.) used in conjunction with quantities or conditions are to include the value and have the meaning indicated by the context. For example, such relative terms include at least the degree of error associated with the measurement of a particular value, tolerances associated with the particular value due to manufacturing, assembly, use, etc. Such terms should also be considered as disclosing a range defined by the absolute values ​​of the two endpoints. Relative terms may refer to a certain percentage (e.g., 1%, 5%, 10% or more) of the indicated value. Numerical values ​​not using relative terms should also be disclosed as specific values ​​with tolerances. Furthermore, “basically” when expressing relative angular relationships (e.g., substantially parallel, substantially perpendicular) may refer to a certain degree (e.g., 1 degree, 5 degrees, 10 degrees or more) added to or subtracted from the indicated angle.

[0041] In this invention, those skilled in the art will understand that the function performed by a component can be performed by one component, multiple components, one part, or multiple parts. Similarly, the function performed by a part can also be performed by one part, one component, or a combination of multiple parts.

[0042] In this invention, the terms "upper," "lower," "left," "right," "front," and "rear," etc., refer to the orientations or positional relationships shown in the accompanying drawings. They are used solely for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention. Furthermore, in the context, it should be understood that when an element is mentioned as being "upper" or "lower" than another element, it can be directly connected to the other element "upper" or "lower," or indirectly connected through an intermediate element. It should also be understood that directional terms such as "upper side," "lower side," "left side," "right side," "front side," and "rear side" not only represent positive orientation but can also be understood as lateral orientation. For example, "above," "on top of," "upper side of," and "above" the first feature "above" or "on the second feature" includes the first feature being directly above, to the upper left, to the upper right, to the upper front, and to the upper rear of the second feature, or simply indicating that the first feature is at a higher horizontal level than the second feature. The terms "below," "under," "below," and "below" for "first feature" and "second feature" include situations where the first feature is directly below, to the lower left, to the lower right, in front of, or behind the second feature, or simply indicate that the first feature is at a lower horizontal level than the second feature. Furthermore, the terms "first" and "second" are used merely for descriptive distinction and have no specific meaning.

[0043] Please refer to Figures 1 to 7 As shown, this embodiment provides a method for trimming irregular curved surfaces of large steel components, including the following steps:

[0044] S1: Obtain the three-dimensional contour parameters of the area to be repaired of the workpiece 100, and make a contour template 1 by three-dimensional printing technology according to the contour parameters. The contour template 1 includes a first plane 11 and a second plane 12 that intersect along the edge. The two planes enclose an L-shaped structure with a cross section. The curvature of the first plane 11 matches the target curvature of the area to be repaired.

[0045] S2: The second plane 12 is fixedly and adjustablely connected to the adjacent side of the area to be repaired by the adjustable connecting component 2. The adjustable connecting component 2 is adjusted so that the first plane 11 is in close and continuous contact with the area to be repaired in terms of spatial position and angle, forming an extended plane of the area to be repaired, so that the contour template 1 is initially aligned and positioned with the edge of the workpiece 100.

[0046] S3: Using the first plane 11 as the repair reference plane, detect the position and depth of the depression in the area to be repaired on the first plane 11. Detect the position and depth of the depression in the area to be repaired along the first plane 11. First, weld and fill the detected depression 6. Then, mechanically grind the weld filling layer 3 with the first plane 11 as the reference until the area to be repaired is consistent with the curvature of the first plane 11 within the predetermined tolerance range and achieves a continuous transition.

[0047] S4: Using the repaired area as the new repair reference surface, the location and depth of the depression in the adjacent area are detected, the detected depression 6 is filled by welding, and the weld filling layer 3 is mechanically ground until the adjacent area is consistent with the curvature of the new repair reference surface within the predetermined tolerance range and achieves a continuous transition.

[0048] S5: Repeat step S4 until the overall surface trimming of the workpiece is completed.

[0049] By acquiring the contour parameters of workpiece 100, a contour template 1 is fabricated using 3D printing technology. The contour template 1 has an L-shaped cross-section, consisting of a first plane 11 and a second plane 12 that intersect along the edges. The two planes can serve as a reference plane and a connecting plane, respectively. The first plane 11 serves as a trimming reference plane, and its curvature shape is consistent with the target curvature shape, forming an extension surface of the area to be trimmed, providing a precise starting reference. The second plane 12 serves as a connecting plane, which can be aligned and connected with the adjacent side of the area to be trimmed on workpiece 100 to achieve spatial positioning. Compared with full-curved or thick templates, the L-shaped structure only retains the necessary reference and plane support, reducing the amount of printing material used, providing a natural and stable physical reference, and facilitating disassembly and adjustment. Thus, while ensuring positioning accuracy, it effectively reduces the manufacturing cost of the contour template 1.

[0050] The second plane 12 of the contour template 1 is detachably and fixedly connected to the adjacent side of the area to be repaired via an adjustable connector, achieving initial alignment and positioning of the template and the edge of the workpiece 100. If there is unevenness between the adjacent sides, causing the first plane 11 to form an angle with the area to be repaired, the template can be precisely spatially corrected by adjusting the connector to compensate for local deviations. This ensures a continuous transition between the repair reference surface and the surface to be repaired, improves repair accuracy and repeatability, and achieves high precision in initial positioning. This ensures local repair accuracy and continuous connection with the overall surface, allowing the initial repair area to smoothly fit with the target surface and avoiding errors caused by differences in human experience.

[0051] After the contour template 1 is accurately installed, a step-by-step process is employed: first, accurately detect local depressions in the area to be repaired; then, weld and repair; finally, grind. This process gradually brings the curved surface closer to the predetermined shape, effectively controlling the amount of local correction and avoiding over-grinding or under-repair, while ensuring a smooth transition of the overall curved surface. Subsequently, the repaired area is used as a new reference surface to gradually repair the remaining areas to be repaired, achieving a balance between local accuracy and overall continuity, ensuring the overall consistency and controllable tolerances of large, complex, irregularly shaped components.

[0052] This method has a clear process, reduces rework, reduces reliance on operator experience, improves trimming efficiency and accuracy, and reduces processing costs; at the same time, the stable fixation of the contour template 1 avoids the risk of operational displacement, achieving efficient and safe operation.

[0053] It should be noted that 3D printing technology is an existing technology and will not be elaborated upon here.

[0054] The L-shaped contour template 1 is a corner structure composed of two planes. If it relies solely on the planes themselves, it may deform or warp under stress (such as slight impacts during operation, 100° workpiece pressing, or welding vibration). To enhance the structural strength and rigidity of the contour template 1, such as... Figure 2 As shown, in some embodiments, the conforming template 1 further includes multiple reinforcing ribs 13. Each reinforcing rib 13 is connected at one end to a first plane 11 and at the other end to a second plane 12, forming a triangular support structure between the first plane 11 and the second plane 12, which significantly improves the overall rigidity of the template and prevents bending or twisting. Furthermore, the multiple reinforcing ribs 13 are evenly spaced along the length of their intersecting edges to uniformly distribute stress, reduce localized stress concentration, and improve service life.

[0055] Combination Figure 3 and Figure 4 As shown, since the workpiece 100 is a large steel component, in some optional embodiments, the adjustable connection assembly 2 in step S2 includes a magnetic connector 21 and an angle adjustment assembly 22. One end of the magnetic connector 21 is detachably connected to the adjacent side by magnetic force and is attracted to the adjacent side. The other end is threadedly connected to the second plane 12 by a bolt 23, which quickly connects the contour template 1 to the workpiece 100, improving work efficiency. The angle adjustment assembly 22 is installed between the magnetic connector 21 and the second plane 12 to adjust the installation angle of the second plane 12 relative to the adjacent side, so as to compensate for the unevenness or dimensional deviation of the adjacent side, and ensure a continuous transition between the first plane 11 and the curved surface of the area to be repaired, thereby improving the repair accuracy. At the same time, this design allows the contour template 1 to quickly adapt to different workpieces 100 with the same target curvature in the area to be repaired, without the need to remanufacture the template, reducing the manufacturing cost and improving operational flexibility and reusability. The magnetic connector 21 can be, but is not limited to, an electromagnet, and is not specifically limited here.

[0056] Multiple adjustable connection components 2 can be set and arranged in a matrix to make the connection between the contour template 1 and the workpiece 100 more stable.

[0057] Specifically, the angle adjustment component 22 includes a wedge block 221. The wedge block 221 has a waist hole 222 along its length. The bolt 23 passes through the second plane 12 and the waist hole 222 of the wedge block 221 in sequence and is threadedly connected to the magnetic connector 21. The wedge block 221 can slide relative to the magnetic connector 21 along the long axis of the waist hole 222. Since the wedge block 221 is wedge-shaped (wide at the bottom and narrow at the top or in the opposite direction), and the waist hole 222 is an elliptical hole or an elongated hole, the long axis of the waist hole 222 is consistent with the tilt angle adjustment direction of the second plane 12. It has sufficient freedom along the long axis of the waist hole 222 so that the wedge block 221 can slide relative to the bolt 23. The lateral width of the wedge block 221 is limited by the waist hole 222 to ensure stability. By changing the position of bolt 23 within the waist hole 222 of wedge block 221, the tilt angle of the second plane 12 can be adjusted, thereby achieving fine-tuning of the angle of the contour template 1 and filling gaps. After adjustment, tightening bolt 23 can lock wedge block 221, precisely fixing the angle between contour template 1 and workpiece 100. This not only enables quick and repeatable angle adjustment but also ensures the overall stability of contour template 1.

[0058] The magnetic connector 21 has a pre-drilled threaded hole, and the bolt 23 needs to be screwed in along the axis of the threaded hole, keeping it parallel to the threaded hole. However, after the contour template 1 adjusts the angle using the wedge block 221, there is an angle between the bolt 23 channel on the second plane 12 and the axis of the threaded hole, resulting in a certain inclination between the bolt 23 and the channel of the second plane 12. To improve connection stability, in some embodiments, the angle adjustment assembly 22 also includes a spherical washer 223 and a conical washer 224. The bolt 23 includes a nut and a screw, the conical washer 224 is sandwiched between the nut and the second plane 12, and the spherical washer 223 is sleeved on the screw and located between the nut and the conical washer 224. The spherical washer 223 and the conical washer 224 are connected to compensate for the angular deviation of the second plane 12. Because there is an angle between the bolt 23 and the hole in the second plane 12, direct tightening may cause gaps or stress concentration. The spherical washer 223 can rotate freely along its spherical surface, and the conical washer 224 provides an inclined support surface. The two work together to automatically adjust the angle, so that the nut surface is in close contact with the second plane 12. When adjusting the tightness of the bolt 23, the spherical washer 223 rotates along the conical washer 224 to achieve fine adjustment of the angle of the second plane 12, thereby accurately adapting to the inclination of the second plane 12. After adjustment, the tightening nut can lock the spherical washer 223 and the conical washer 224 to ensure the second plane 12 is stably fixed, while compensating for the asymmetrical stress or local gaps caused by the inclination, ensuring that the contact surface between the nut and the second plane 12 is flat and in close contact.

[0059] like Figure 5As shown, in some optional embodiments, in step S3, the flatness measuring instrument 4, using the first plane 11 as the detection reference, detects the position and depth of the depression in the area to be repaired. The flatness measuring instrument 4 has a high-precision displacement or optical measurement system, which can achieve high-precision surface morphology measurement. Compared with manual visual inspection or contact measuring tools, it can more accurately reflect small deviations such as depressions and warping, reduce the time of repeated measurement and manual comparison, and significantly improve the efficiency of detection and repair. The flatness measuring instrument 4 can be, but is not limited to, a laser flatness measuring instrument 4; no specific limitation is made here.

[0060] like Figure 6 As shown, in step S3, the detected depression 6 is filled by welding. The height of the welding filling layer 3 is slightly higher than the repair reference surface, which can gradually remove the excess part in the subsequent mechanical grinding process, leaving a finishing allowance, avoiding excessive or insufficient grinding at one time, ensuring that the final surface is flush with the reference surface, and improving the repair accuracy.

[0061] like Figure 7 As shown, further, in step S3, the weld filler layer 3 is mechanically ground by a mechanical grinding assembly 5. The mechanical grinding assembly 5 includes a height adjustment component 51 and a grinding component 52. The height adjustment component 51 is located on the dressing reference surface and is installed at the bottom of the grinding component 52. The two are fixedly connected to adjust the relative height between the grinding end of the grinding component 52 and the area to be dressed. Typically, after the weld filler, the weld surface is slightly higher than the first plane 11 to ensure sufficient allowance for subsequent grinding. The height adjustment component 51... Installed at the bottom of the grinding workpiece 52, the contact height between the grinding workpiece 52 and the workpiece 100 can be adjusted according to the thickness of the weld repair layer and the surface shape, achieving precise control of the amount of material removed. Simultaneously, the irregular curved surface of the workpiece 100 may have local convexities or depressions; the position of the grinding end of the grinding workpiece 52 can be finely adjusted via the height adjustment component 51, ensuring that the grinding always conforms to the curved surface, guaranteeing surface continuity and flatness. This allows the same mechanical grinding assembly 5 to adapt to weld filler layers 3 of different thicknesses, reducing manual intervention and improving efficiency and finishing consistency. It is understood that the height adjustment component 51 may, but is not limited to, using a hydraulic cylinder, and the grinding workpiece 52 may, but is not limited to, using an angle grinder; no specific limitations are made here.

[0062] In some optional embodiments, the grinding end of the workpiece 52 is provided with a sanding roller sleeve 53. The sanding roller sleeve 53 is a cylindrical or flexible outer layer structure that can automatically adapt to the slight undulations of irregular curved surfaces within a certain range, avoiding the formation of tool marks or local collapse of hard grinding heads. Furthermore, its rolling grinding forms line contact or surface contact, resulting in more uniform removal and a smooth finish without obvious steps.

[0063] Understandably, after completing step S3, the trimmed area can be measured again. If it does not meet the standard, step S3 can be repeated until it meets the standard.

[0064] In some optional embodiments, the surface of workpiece 100 is divided into several grid regions. A first plane 11 is used as the first trimming reference surface for the detection and trimming of the corresponding grid regions. Subsequently, adjacent grid regions are used with the trimmed region as the trimming reference surface, and the detection and trimming of the entire curved surface of workpiece 100 is completed sequentially. By dividing the curved surface into multiple small grid regions and using the trimmed region as the trimming reference for the next region, continuous transition between regions and suppression of error accumulation are achieved, ensuring the smoothness and consistency of the entire curved surface. Thus, the error at each step is locally controlled, resulting in higher trimming accuracy.

[0065] It should be noted that the flatness measuring instrument 4 described above can also be used to detect the location and depth of depressions in adjacent areas during step S4; similarly, the mechanical grinding assembly 5 described above can also be used when mechanically grinding the weld filler layer 3. After completing step S4, the finished area can be measured again. If it is not up to standard, step S4 can be repeated until it meets the standard.

[0066] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art will be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is neither necessary nor possible to exhaustively describe all embodiments here. 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 claims of the present invention.

Claims

1. A method for trimming irregular curved surfaces of large steel components, characterized in that, Includes the following steps: S1: Obtain the three-dimensional contour parameters of the area to be repaired of the workpiece (100), and make a contour template (1) by three-dimensional printing technology according to the contour parameters. The contour template (1) includes a first plane (11) and a second plane (12) that intersect along the edge. The two planes enclose an L-shaped structure. The curvature of the first plane (11) matches the target curvature of the area to be repaired. S2: The second plane (12) is fixedly and adjustablely connected to the adjacent side of the area to be repaired by the adjustable connecting component (2). The adjustable connecting component (2) is adjusted so that the first plane (11) is in close and continuous contact with the area to be repaired in terms of spatial position and angle, forming an extended plane of the area to be repaired, so that the contour template (1) is initially aligned and positioned with the edge of the workpiece (100). The adjustable connection assembly (2) includes a magnetic connector (21) and an angle adjustment assembly (22). One end of the magnetic connector (21) is detachably connected to the adjacent side by magnetic force, and the other end is threadedly connected to the second plane (12) by a bolt (23). The angle adjustment assembly (22) is installed between the magnetic connector (21) and the second plane (12) to adjust the installation angle of the second plane (12) relative to the adjacent side. The angle adjustment assembly (22) includes a wedge block (221). The wedge block (221) has a waist hole (222) along its longitudinal direction. The bolt (23) passes through the second plane (12) and the waist hole (222) of the wedge block (221) in sequence and is threadedly connected to the magnetic connector (21). The wedge block (221) can slide relative to the magnetic connector (21) along the long axis of the waist hole (222). S3: Using the first plane (11) as the repair reference plane, the depression position and depth of the area to be repaired are detected on the first plane (11). The detected depression (6) is first filled by welding. Then, the weld filling layer (3) is mechanically ground with the first plane (11) as the reference until the area to be repaired is consistent with the curvature shape of the first plane (11) within the predetermined tolerance range and achieves a continuous transition. S4: Using the repaired area as the new repair reference surface, the depression position and depth of the adjacent area are detected, the detected depression (6) is filled by welding, and the weld filling layer (3) is mechanically ground until the adjacent area is consistent with the curvature of the new repair reference surface within the predetermined tolerance range and achieves a continuous transition. S5: Repeat step S4 until the overall surface trimming of the workpiece (100) is completed.

2. The method for trimming irregular curved surfaces of large steel components according to claim 1, characterized in that, The contour template (1) also includes a plurality of reinforcing ribs (13), each of which is connected at one end to the first plane (11) and at the other end to the second plane (12).

3. The method for trimming irregular curved surfaces of large steel components according to claim 1, characterized in that, The angle adjustment assembly (22) further includes a spherical washer (223) and a conical washer (224). The bolt (23) includes a nut and a screw. The conical washer (224) is sandwiched between the nut and the second plane (12). The spherical washer (223) is sleeved on the screw and located between the nut and the conical washer (224). The spherical washer (223) and the conical washer (224) are connected to each other to compensate for the angle deviation of the second plane (12).

4. The method for trimming irregular curved surfaces of large steel components according to claim 1, characterized in that, In step S3, the flatness tester (4) uses the first plane (11) as the test reference to detect the position and depth of the depression in the area to be repaired.

5. The method for trimming irregular curved surfaces of large steel components according to claim 4, characterized in that, In step S3, the detected depression (6) is filled by welding, and the height of the welding filling layer (3) is slightly higher than the repair reference surface.

6. The method for trimming irregular curved surfaces of large steel components according to claim 5, characterized in that, In step S3, the weld filler layer (3) is mechanically ground by a mechanical grinding assembly (5). The mechanical grinding assembly (5) includes a height adjustment component (51) and a grinding component (52). The height adjustment component (51) is located on the dressing reference surface and is installed on the bottom of the grinding component (52). The two are fixedly connected to adjust the relative height between the grinding end of the grinding component (52) and the area to be dressed.

7. The method for trimming irregular curved surfaces of large steel components according to claim 6, characterized in that, The grinding end of the grinding workpiece (52) is provided with a sanding roller sleeve (53).

8. The method for trimming irregular curved surfaces of large steel components according to claim 1, characterized in that, The surface of the workpiece (100) is divided into several grid areas. The first plane (11) is used as the first trimming reference surface to detect and trim the corresponding grid areas. Then, the adjacent grid areas are used as the trimming reference surface to detect and trim the entire curved surface of the workpiece (100) in sequence.

Images