Reconstruction shield machine assembly method and related equipment

Abstract

The present application belongs to the technical field of shield machine maintenance, and discloses a method for assembling a rebuilt shield machine and related equipment, including obtaining basic detection information of each main bearing component obtained by disassembling the main bearing, using laser tracking technology to obtain three-dimensional models of alternative available components, the shield machine main shaft and the shield body of the shield machine, obtaining standard three-dimensional models of standard parts corresponding to unavailable components, performing simulated assembly to determine the final available components, and outputting assembly plan information; in this way, the actual conditions of each component of the main bearing can be accurately evaluated, accurate component matching can be achieved, components can be accurately screened and reused, and maintenance costs can be reduced.

Description

Technical Field

[0001] The present application relates to the technical field of shield machine maintenance, and in particular to a method for assembling a rebuilt shield machine and related equipment. Background Art

[0002] The shield tunnel boring machine, also known as the shield machine, is a large-scale tunnel excavation construction equipment. The shield machine has the functions of excavating rock and soil, conveying slag, assembling tunnels, and self-correcting. Due to the large size of the shield machine and the harsh working environment, the reliability of each component in the shield machine is extremely high. The rebuilt shield machine refers to the shield machine obtained by replacing some parts of the original shield machine.

[0003] The shield machine needs to dismantle and repair its main bearing every time it runs a certain distance (such as 5km), and replace it when necessary. Due to the large size of the shield machine, its main bearing and the structure connected to the main bearing (such as the main shaft, shield body, etc.) are large in size. It is difficult to accurately measure the size of these structures using ordinary measuring tools, so it is difficult to accurately determine whether the various components of the main bearing can continue to be used and whether they can be replaced separately. This leads to the following problems:

[0004] First, it is difficult to accurately assess the actual condition of each component of the main bearing. Due to the lack of precise measurement data, it is impossible to fully understand key information such as the degree of wear and deformation of each component of the main bearing, which may lead to misjudgment of the component service life.

[0005] Secondly, it is difficult to carry out accurate component matching. When replacing some parts, due to the lack of accurate dimensional data, there may be problems with the matching between the new and old parts, affecting the overall performance and service life of the main bearing.

[0006] Furthermore, it is difficult to accurately screen and reuse components. Since the condition of each component cannot be accurately assessed, some components that can still be used may be missed, resulting in a waste of resources.

[0007] Finally, these issues lead to increased maintenance costs. Since it is difficult to accurately judge the condition and compatibility of each component, the main bearing is often replaced as a whole instead of only replacing the necessary parts, which greatly increases maintenance costs.

[0008] In view of the above problems, the existing technology needs to be improved urgently. Summary of the invention

[0009] The purpose of this application is to provide a method for assembling a remanufactured shield machine and related equipment, which can accurately evaluate the actual conditions of the main bearing components, achieve precise component matching, accurately screen and reuse components, and reduce maintenance costs.

[0010] In a first aspect, the present application provides a method for assembling a rebuilt shield machine, comprising the steps of:

[0011] A1. Obtaining basic inspection information of each main bearing component obtained by disassembling the main bearing, so as to determine the candidate usable components and unusable components from each of the main bearing components; the basic inspection information includes appearance information, surface hardness data and internal damage information;

[0012] A2. Using laser tracking technology to obtain the three-dimensional position data of multiple measurement points of each of the alternative available components, the shield machine main shaft and the shield body of the shield machine, so as to generate a three-dimensional model of each of the alternative available components, the shield machine main shaft and the shield body of the shield machine;

[0013] A3. Obtaining a standard three-dimensional model of a standard part corresponding to each of the unusable components;

[0014] A4. Performing a simulated assembly using the three-dimensional models of each of the alternative available components, the shield machine main shaft and the shield body of the shield machine and the standard three-dimensional models of each of the unavailable components to determine the final available components from each of the alternative available components;

[0015] A5. Output assembly plan information to guide the user to use the final usable components and standard parts corresponding to other main bearing components to assemble a remanufactured main bearing, and then use the remanufactured main bearing to assemble the shield machine main shaft and the shield body of the shield machine.

[0016] Combining high-precision laser tracking technology with virtual assembly solves the problem of accurate measurement and assembly in the process of rebuilding the main bearing of a large shield machine. By obtaining the multi-dimensional basic detection information of the main bearing components, combining laser tracking technology to generate a high-precision three-dimensional model, and then performing virtual assembly, and finally outputting a specific assembly plan, the reconstruction process of the shield machine main bearing is made more precise and efficient. It can accurately evaluate the actual conditions of each component of the main bearing, achieve accurate component matching, accurately screen and reuse components, and reduce maintenance costs.

[0017] Preferably, step A1 comprises:

[0018] Acquiring appearance information of each of the main bearing components through appearance inspection to determine whether the appearance of each of the main bearing components is qualified; the appearance information includes at least one of rust information, crack information and pitting information;

[0019] Acquiring surface hardness data of each main bearing component through hardness testing to determine whether the hardness of each main bearing component is qualified;

[0020] Obtaining internal damage information of each main bearing component through flaw detection to determine whether the internal damage of each main bearing component is qualified;

[0021] The main bearing components with qualified appearance, qualified hardness and qualified internal damage are determined as candidate usable components, and other main bearing components are determined as unusable components, and a list of candidate usable components and unusable components is generated.

[0022] The main bearing components are comprehensively evaluated through appearance inspection, hardness inspection and flaw detection. Appearance inspection can find visible defects on the surface, hardness inspection can ensure the strength and wear resistance of the components, and flaw detection can find hidden defects inside. Through the inspection of these three dimensions, the condition of the components can be comprehensively evaluated.

[0023] Preferably, step A2 comprises:

[0024] After affixing positioning targets to a plurality of measuring points on the surface of each of the optional available components, the shield machine main shaft and the shield body of the shield machine, using a laser tracker to obtain the three-dimensional position data of each of the positioning targets, and obtaining the three-dimensional position data of the corresponding measuring points;

[0025] A three-dimensional model of each of the alternative available components, the main shaft of the shield machine and the shield body of the shield machine is generated in the three-dimensional measurement software according to the three-dimensional position data of each of the measurement points.

[0026] This solution realizes accurate 3D modeling of large shield machine components. The application of laser tracking technology solves the problem that traditional measurement methods are difficult to accurately measure large structures, while the use of 3D measurement software greatly improves the efficiency and accuracy of modeling.

[0027] Preferably, after step A2 and before step A3, the method further comprises the following steps:

[0028] A6. Based on the three-dimensional models of each of the alternative available components, the shield machine main shaft and the shield body of the shield machine, extract the characteristic assembly parameters of each of the alternative available components, the shield machine main shaft and the shield body of the shield machine to update the list of alternative available components and unusable components; the characteristic assembly parameters include at least one of roundness, flatness and diameter.

[0029] Preferably, after step A2 and before step A3, the method further comprises the following steps:

[0030] A7. Obtain the usage time and reference service life of each of the candidate available components, and update the list of the candidate available components and the unavailable components by comparing the usage time and the reference service life.

[0031] Preferably, step A4 comprises:

[0032] A401. Perform simulated assembly using the three-dimensional models of the alternative available components, the main shaft of the shield machine and the shield body of the shield machine and the standard three-dimensional models of the unavailable components;

[0033] A402. If the simulated assembly process shows assembly mismatch, execute:

[0034] determining the alternative available component involved in the assembly mismatch as a component to be replaced;

[0035] sorting the parts to be replaced in ascending order according to price;

[0036] After removing the first-ranked to-be-replaced component from the list of candidate available components and adding it to the list of unavailable components, returning to step A401;

[0037] A403. If no assembly mismatch occurs during the simulated assembly process, the simulated assembly is terminated, and the alternative available parts remaining in the list of alternative available parts are determined as final available parts.

[0038] Preferably, the assembly solution information includes a list of finally available components, a list of unavailable components and reasons why each unavailable component is unavailable.

[0039] In a second aspect, the present application provides a reconstructed shield machine assembly device, comprising:

[0040] A first screening module is used to obtain basic detection information of each main bearing component obtained by disassembling the main bearing, so as to determine the candidate usable components and unusable components from each of the main bearing components; the basic detection information includes appearance information, surface hardness data and internal damage information;

[0041] A three-dimensional model building module, used to obtain three-dimensional position data of multiple measurement points of each of the alternative available components, the shield machine main shaft and the shield body of the shield machine by using laser tracking technology, so as to generate a three-dimensional model of each of the alternative available components, the shield machine main shaft and the shield body of the shield machine;

[0042] A first acquisition module is used to acquire a standard three-dimensional model of a standard part corresponding to each of the unusable components;

[0043] A simulation screening module, used for performing simulation assembly using the three-dimensional models of the shield machine main shaft and the shield body of the shield machine and the standard three-dimensional models of the unusable parts, so as to determine the final usable parts from the various alternative usable parts;

[0044] The output module is used to output assembly plan information to guide the user to use the final usable parts and the standard parts corresponding to other main bearing parts to assemble the remanufactured main bearing, and then use the remanufactured main bearing to assemble the shield machine main shaft and the shield body of the shield machine.

[0045] In a third aspect, the present application provides an electronic device, comprising a processor and a memory, wherein the memory stores a computer program executable by the processor, and when the processor executes the computer program, it runs the steps in the method for assembling a reconstructed shield machine as described above.

[0046] In a fourth aspect, the present application provides a computer-readable storage medium having a computer program stored thereon, and when the computer program is executed by a processor, the steps in the method for assembling a reconstructed shield machine as described above are executed.

[0047] Beneficial effects: The assembly method and related equipment for the rebuilt shield machine provided by this application combine high-precision laser tracking technology with virtual assembly, solving the problem of accurate measurement and assembly in the process of rebuilding the main bearing of a large shield machine. By obtaining the multi-dimensional basic detection information of the main bearing components, combining laser tracking technology to generate a high-precision three-dimensional model, and then performing virtual assembly, and finally outputting a specific assembly plan, the reconstruction process of the shield machine main bearing is made more precise and efficient. It can accurately evaluate the actual conditions of each component of the main bearing, achieve accurate component matching, accurately screen and reuse components, and reduce maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] Figure 1 A flow chart of a method for assembling a rebuilt shield machine provided in an embodiment of the present application.

[0049] Figure 2 A schematic structural diagram of the assembly device for a reengineered shield machine provided in an embodiment of the present application.

[0050] Figure 3 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application.

[0051] Explanation of reference numerals: 1. First screening module; 2. Three-dimensional model building module; 3. First acquisition module; 4. Simulation screening module; 5. Output module; 301. Processor; 302. Memory; 303. Communication bus. DETAILED DESCRIPTION

[0052] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application claimed for protection, but merely represents the selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without making creative work belong to the scope of protection of the present application.

[0053] It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. At the same time, in the description of this application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0054] The shield machine is a large-scale tunnel excavation construction equipment with functions such as excavating rock and soil, transporting slag, assembling tunnels, and self-correcting. Due to its harsh working environment, the reliability requirements of each component are extremely high. Among them, the main bearing is a key component of the shield machine and needs to be disassembled, repaired or replaced regularly. However, due to the large size of the shield machine and its main bearing, it is difficult to accurately measure the dimensions of the main bearing and related structures using conventional measuring tools. This makes it difficult to accurately determine whether the various components of the main bearing can continue to be used or replaced separately, which often leads to the overall replacement of the main bearing, greatly increasing maintenance costs.

[0055] Failure to address these technical issues will have serious consequences. First, inaccurate component evaluation may lead to the mistaken discarding of still useful components or the misinstallation of unqualified components into the remanufactured main bearings, both of which will significantly increase maintenance costs or reduce the reliability of the shield machine. Second, insufficient assembly accuracy may cause abnormal vibration, overheating or accelerated wear of the main bearings during operation, which may cause sudden failure of the shield machine in severe cases, which will not only interrupt the construction progress but also endanger the safety of construction workers. In addition, due to the lack of accurate three-dimensional data support, it is difficult for technicians to perform virtual assembly simulations, which increases the trial and error cost and time in the actual assembly process. These problems not only affect the maintenance efficiency of a single shield machine, but may also have a chain reaction on the progress and cost control of the entire tunnel project. Therefore, there is an urgent need for a technical solution that can accurately evaluate the status of components, measure the dimensions of large components with high precision, and ensure assembly accuracy, so as to improve the efficiency and reliability of shield machine main bearing remanufacturing.

[0056] To do this, please refer to Figure 1The present application provides a method for assembling a rebuilt shield machine, comprising the steps of:

[0057] A1. Obtain basic inspection information of each main bearing component obtained by disassembling the main bearing, so as to determine the candidate usable components and unusable components from each main bearing component; the basic inspection information includes appearance information, surface hardness data and internal damage information;

[0058] A2. Use laser tracking technology to obtain the three-dimensional position data of multiple measurement points of each candidate available component, the shield machine main shaft and the shield body of the shield machine, so as to generate a three-dimensional model of each candidate available component, the shield machine main shaft and the shield body of the shield machine;

[0059] A3. Obtain the standard 3D model of the standard parts corresponding to each unusable component;

[0060] A4. Perform simulated assembly using the three-dimensional models of the various alternative available parts, the shield machine main shaft and the shield body, and the standard three-dimensional models of the various unavailable parts to determine the final available parts from the various alternative available parts;

[0061] A5. Output assembly plan information to guide users to use the final available parts and the corresponding standard parts of other main bearing parts to assemble the remanufactured main bearing, and then assemble the remanufactured main bearing with the shield machine main shaft and shield body.

[0062] Combining high-precision laser tracking technology with virtual assembly solves the problem of accurate measurement and assembly in the process of rebuilding the main bearing of a large shield machine. By obtaining the multi-dimensional basic detection information of the main bearing components, combining laser tracking technology to generate a high-precision three-dimensional model, and then performing virtual assembly, and finally outputting a specific assembly plan, the reconstruction process of the shield machine main bearing is made more precise and efficient. It can accurately evaluate the actual conditions of each component of the main bearing, achieve accurate component matching, accurately screen and reuse components, and reduce maintenance costs.

[0063] Among them, simulated assembly refers to the process of virtual assembly using three-dimensional models in a computer environment, which can be achieved by using professional three-dimensional assembly simulation software.

[0064] The working principle of this application can be described in detail as follows:

[0065] First, the disassembled main bearing components are comprehensively inspected. Surface damage is identified through visual inspection, surface hardness is measured using a hardness tester or other methods, and internal defects are detected using non-destructive testing methods such as ultrasound or X-rays. These test results constitute basic test information, which is used to preliminarily screen out alternative usable components and unusable components.

[0066] Next, laser tracking technology is used to obtain three-dimensional position data. Multiple reflective targets are arranged on the available components, the main shaft of the shield machine, and the surface of the shield body, and the spatial coordinates of these targets are measured using a high-precision laser tracker. These coordinate points are converted into accurate three-dimensional models using professional three-dimensional modeling software.

[0067] At the same time, obtain the standard 3D models of the standard parts corresponding to the unavailable parts, which can usually be obtained from the manufacturer or reconstructed through reverse engineering.

[0068] Then, simulated assembly is performed in a virtual environment. The 3D models of the available alternative parts, the main shaft and shield of the shield machine, and the standard 3D models of the unavailable parts are imported into the assembly simulation software. Through the virtual assembly process, the matching degree, clearance and interference between the parts are checked to determine the final available combination of parts.

[0069] Finally, based on the results of the simulated assembly, detailed assembly plan information is generated, which can include the final available parts list, assembly sequence, key dimensions and tolerance requirements, etc., to provide precise guidance for the actual assembly process.

[0070] The reason for choosing this method is that laser tracking technology can achieve high-precision measurement of large components in a field environment, overcoming the limitations of traditional measurement methods; virtual assembly avoids repeated trial and error in the actual assembly process, greatly improving efficiency and accuracy. This combination significantly improves the accuracy and reliability of the shield machine main bearing reconstruction, while reducing maintenance costs.

[0071] In some embodiments, step A1 comprises:

[0072] A101. Obtaining appearance information of each main bearing component through appearance inspection to determine whether the appearance of each main bearing component is qualified; the appearance information includes at least one of rust information, crack information and pitting information;

[0073] A102. Obtain the surface hardness data of each main bearing component through hardness testing to determine whether the hardness of each main bearing component is qualified;

[0074] A103. Obtain the internal damage information of each main bearing component through flaw detection to determine whether the internal damage of each main bearing component is qualified;

[0075] Main bearing components with qualified appearance, qualified hardness and qualified internal damage are determined as alternative usable components, and other main bearing components are determined as unusable components, and a list of alternative usable components and unusable components is generated.

[0076] The main bearing components are comprehensively evaluated through three dimensions: appearance inspection, hardness inspection and flaw detection. Appearance inspection can detect visible defects on the surface, hardness inspection can ensure the strength and wear resistance of the components, and flaw detection can detect hidden defects inside. Through the inspection of these three dimensions, the status of the components can be comprehensively evaluated. Only components that meet the requirements of qualified appearance, qualified hardness and qualified internal damage are determined as alternative usable components, and other components are determined as unusable components. This strict screening standard can ensure that the selected alternative usable components have high quality and reliability. Therefore, the present application provides clear guidance for the subsequent assembly process by generating a list of alternative usable components and unusable components. This not only improves assembly efficiency, but also reduces the risk of misusing unqualified components.

[0077] Specifically, appearance inspection can be achieved in a variety of ways. For example, a high-resolution camera can be used to photograph the surface of the main bearing component, and then defects such as rust, cracks, and pits can be automatically identified through image processing algorithms. Another method is to use 3D scanning technology to create a three-dimensional model of the component surface, thereby more accurately detecting surface defects.

[0078] Hardness testing can be performed using a portable hardness tester. Measurements can be made at multiple key locations of the main bearing components (e.g., multiple locations are equally spaced on the raceway surfaces of the outer and inner rings as key locations), and then the measurement results are compared with the preset hardness standard. For example, for some types of bearing steel, a Rockwell hardness of 58-62HRC may be required.

[0079] Flaw detection can be carried out using non-destructive testing techniques such as ultrasonic testing or X-ray testing. Ultrasonic testing can detect internal defects such as cracks and pores, while X-ray testing can provide a clear image of the internal structure of the component.

[0080] There are correlations and interactions between these inspection methods. For example, surface cracks found by appearance inspection may indicate more serious internal damage, which requires more detailed flaw detection. Similarly, abnormal hardness test results may be related to internal structural changes, which also require flaw detection to confirm. Therefore, two flaw detection inspection methods can be set up: basic flaw detection inspection method and advanced flaw detection inspection method; among which, the flaw detection procedure of the advanced flaw detection inspection method is more stringent than that of the basic flaw detection inspection method. For example, the basic flaw detection inspection method requires the use of one flaw detection technology for flaw detection, and the advanced flaw detection inspection method requires the use of multiple flaw detection technologies for flaw detection; and / or, the advanced flaw detection inspection method requires more detection position points than the basic flaw detection inspection method.

[0081] In the process of solving the problem of accurately judging whether the components of the main bearing are usable, the technical solution of the present application first quickly screens out obviously unqualified components through appearance inspection, thereby reducing the workload of subsequent inspections. Then, hardness testing ensures that the mechanical properties of the components meet the requirements, which is especially important for main bearings that bear high loads. Finally, flaw detection serves as the last line of defense to ensure that no potential internal defects are missed. In actual operation, a high-resolution camera can be used to first take a surface photo of the main bearing component, and then image processing software can be used to analyze the surface condition. If the appearance inspection passes, a portable hardness tester is used to perform a multi-point hardness test on the surface of the component. Finally, an ultrasonic flaw detector is used to fully scan the component to detect internal defects.

[0082] As a preferred embodiment, specific judgment criteria can be set. For example, for appearance inspection, it can be stipulated that the total area of ​​corrosion does not exceed the preset total area threshold (for example, 5% of the surface area) and / or the area of ​​a single corrosion area does not exceed the preset single area area threshold (which can be set according to actual needs), the crack length does not exceed the preset length threshold (for example, 10mm) and / or the number of cracks does not exceed the preset crack number threshold (which can be set according to actual needs), and the pit depth does not exceed the preset depth threshold (for example, 0.5mm). For hardness testing, the surface hardness can be required to be within the preset hardness range (for example, 58-62HRC). For flaw detection, it can be stipulated that the internal defect size does not exceed the preset size threshold (for example, 0.2mm) and / or the number of internal defect points does not exceed the preset defect number threshold (which can be set according to actual needs).

[0083] In some embodiments, step A2 includes:

[0084] A201. After attaching positioning targets to multiple measuring points on the surface of each optional available component, the shield machine main shaft and the shield body of the shield machine, use a laser tracker to obtain the three-dimensional position data of each positioning target to obtain the three-dimensional position data of the corresponding measuring point;

[0085] A202. Generate three-dimensional models of each alternative available component, the main shaft of the shield machine and the shield body of the shield machine based on the three-dimensional position data of each measuring point in the three-dimensional measurement software.

[0086] This solution realizes accurate 3D modeling of large shield machine components. The application of laser tracking technology solves the problem that traditional measurement methods are difficult to accurately measure large structures, while the use of 3D measurement software greatly improves the efficiency and accuracy of modeling.

[0087] Among them, the positioning targets can be reflective stickers, spherical targets or special geometric shapes. The number and distribution of positioning targets should be determined according to the size and complexity of the components to be tested to ensure that the geometric features of the components can be accurately captured. For example, for a cylindrical shield machine main shaft, multiple points on the circumference can be selected at both ends and the middle part to accurately capture its diameter and roundness information.

[0088] Laser trackers can measure the three-dimensional coordinates of large structures with high precision, solving the problem that traditional measurement methods are difficult to accurately measure large structures. The measurement accuracy of laser trackers can usually reach ±20 microns or higher, which is crucial for the accurate measurement of large components of shield machines. During the measurement process, the laser tracker can automatically lock and track each positioning target and quickly obtain its spatial coordinates. In order to improve the measurement accuracy, each positioning target can be measured multiple times and the average value can be taken. For example, each positioning target can be measured 5 times to reduce the impact of random errors.

[0089] By processing the measurement data with software, the 3D models of the available alternative parts, the main shaft of the shield machine and the shield of the shield machine can be quickly and accurately generated. The 3D measurement software can convert the discrete point cloud data into a continuous surface model, and can perform data smoothing, feature extraction and other processing to generate a high-quality 3D model (the specific process is an existing technology and will not be described in detail here). The 3D measurement software can be Polyworks, Geomagic Control X or other 3D measurement software.

[0090] In some preferred embodiments, after step A2 and before step A3, the method further comprises the following steps:

[0091] A6. Based on the three-dimensional models of each alternative available component, the shield machine main shaft and the shield body of the shield machine, extract the characteristic assembly parameters of each alternative available component, the shield machine main shaft and the shield body of the shield machine to update the list of alternative available components and unavailable components; the characteristic assembly parameters include at least one of roundness, flatness and diameter.

[0092] This application solves the problem of improving the accuracy of screening of alternative available parts in the process of remanufacturing shield machine assembly by adding the extraction and list update steps of feature assembly parameters before simulated assembly. By using the three-dimensional model to extract more accurate feature assembly parameters, such as roundness, flatness, and diameter, the actual condition of the parts can be more comprehensively evaluated. This method not only improves the accuracy of screening, but also further optimizes the selection of available parts before simulated assembly, thereby improving the efficiency and quality of the entire reconstruction process.

[0093] Among them, roundness can be used to evaluate the accuracy of the circular surface of the component (such as the peripheral surface of the shield machine main shaft, the connection surface between the inner ring and the shield machine main shaft, the connection surface between the outer ring and the shield body of the shield machine, the raceway surface of the inner ring and the outer ring, etc.), flatness can be used to evaluate the plane accuracy of the component, and diameter can be used to evaluate the accuracy of the matching size. You can use the functions provided by the 3D measurement software to extract feature assembly parameters, or you can use a custom algorithm to calculate these parameters directly from the point cloud data of the 3D model (for example, for the circular surface of the component, you can fit the ideal circular surface by the least squares method, and then calculate the maximum deviation between the actual point cloud and the ideal circular surface to get the roundness value. For the plane of the component, you can fit the best plane and then calculate the maximum distance from the actual point cloud to the best plane to get the flatness value. The diameter of the component can be obtained by measuring the diameters of multiple sections and taking the average value).

[0094] The list of candidate available parts and unavailable parts is updated using the extracted feature assembly parameters. This step can be achieved by comparing with a set threshold value. When at least one feature assembly parameter of a candidate available part exceeds the corresponding preset threshold value or the deviation between at least one feature assembly parameter and the corresponding standard value exceeds the corresponding preset deviation threshold value, the part is removed from the list of candidate available parts and added to the list of unavailable parts. For example, if the roundness or flatness of a part exceeds the preset threshold value, or the deviation of the diameter from the standard size exceeds the allowable range, the part can be removed from the list of candidate available parts and added to the list of unavailable parts.

[0095] In some preferred embodiments, after step A2 and before step A3, the method further comprises the following steps:

[0096] A7. Obtain the usage time and reference service life of each candidate available component, and update the list of candidate available components and unavailable components by comparing the usage time and reference service life.

[0097] By introducing the two key parameters of usage time and reference service life and combining them with the previous screening results, the problem of inaccurate screening of alternative available components in the assembly process of the rebuilt shield machine is effectively solved. This method not only takes into account the current status of the component, but also its historical usage and expected life (i.e., reference service life), so as to evaluate the availability of the component more comprehensively and accurately.

[0098] The usage time can be obtained by querying the usage records of the corresponding candidate available components or using special monitoring equipment. For example, a sensor can be used to record the actual working time of the component, or the usage time of the candidate available component can be estimated through the operation log of the shield machine.

[0099] The reference service life can be obtained from the technical specifications of alternative available components or can be determined based on historical data and expert experience.

[0100] When comparing the usage time and the reference service life to update the list of alternative available parts and unusable parts, the alternative available parts whose usage time is greater than or equal to the corresponding reference service life and the alternative available parts whose remaining life (i.e., the difference between the reference service life and the usage time) is lower than a preset life threshold (which can be set according to actual needs, for example, 90% of the reference service life) can be removed from the list of alternative available parts and added to the list of unusable parts; to ensure that the parts that are not replaced have sufficient remaining life before the next disassembly and maintenance.

[0101] In some embodiments, step A4 comprises:

[0102] A401. Use the three-dimensional models of the available alternative parts, the main shaft of the shield machine and the shield body of the shield machine and the standard three-dimensional models of the unavailable parts to simulate assembly;

[0103] A402. If the simulated assembly process shows assembly mismatch, execute:

[0104] Identifying the alternative available parts involved in the assembly mismatch as the parts to be replaced;

[0105] Sort the parts to be replaced in ascending order according to price;

[0106] After removing the first-ranked to-be-replaced component from the list of candidate available components and adding it to the list of unavailable components, the process returns to step A401;

[0107] A403. If no assembly mismatch occurs during the simulated assembly process, the simulated assembly is terminated, and the alternative available parts remaining in the list of alternative available parts are determined as final available parts.

[0108] By using 3D models for virtual assembly, potential assembly problems can be discovered in advance. When an assembly mismatch occurs, the system can gradually optimize the assembly plan by identifying problem parts, sorting prices, and updating lists until a suitable combination is found. This method not only solves the problem of assembly mismatch, but also minimizes costs while ensuring assembly quality. This is because the matching between components affects each other. When a part to be replaced is replaced with a standard part, other parts to be replaced that were originally incompatible may become compatible. Therefore, it may not be necessary to replace all parts to be replaced. At this time, the replaced parts to be replaced are lower-priced parts, while the higher-priced parts to be replaced are retained, which is conducive to reducing costs.

[0109] Simulated assembly can be achieved in many ways. For example, you can use 3D CAD software for virtual assembly, or you can use specialized assembly simulation software. When performing simulated assembly, you can set different assembly sequences and methods to simulate various situations that may be encountered during the actual assembly process.

[0110] When an assembly mismatch is detected, the system automatically triggers a series of processing steps. First, the system pinpoints the alternative available component that causes the mismatch and marks it as a replacement component. The determination of assembly mismatch can be achieved by analyzing the collision detection results or size matching during the assembly process.

[0111] The parts to be replaced are sorted in ascending order according to their prices. The sorting results are used to guide subsequent part replacement decisions to ensure that the cost is reduced as much as possible while meeting the assembly requirements.

[0112] In the specific implementation, some parameters can be set to control the iteration process. For example, the maximum number of iterations can be set to prevent infinite loops. At the same time, a price threshold can be set (which can be set according to actual needs, such as 40% of the original price of the main bearing). When the total value of the remaining available parts is lower than this threshold, the system will prompt that it may be necessary to consider replacing the main bearing as a whole.

[0113] In some embodiments, the assembly plan information includes a list of ultimately available components, a list of unavailable components, and a reason why each unavailable component is unavailable.

[0114] Specifically, the final list of usable parts clearly indicates which parts can continue to be used, providing direct guidance for assembly. The list of unusable parts clearly indicates which parts need to be replaced, avoiding the use of unqualified parts. The reasons for the unusability of each unusable part provide the specific problems of each unusable part, which helps with subsequent repair or procurement decisions.

[0115] Furthermore, the list of finally available parts may include information such as part numbers, names, specifications, etc. The list of unavailable parts may include part numbers, names, specifications, and information on new parts recommended for replacement. The reasons for the unavailability of each unavailable part may include detailed descriptions such as specific damage type, degree of wear, performance parameter deviation, etc.

[0116] Assembly plan information can also include assembly sequence, key dimensions and tolerance requirements, etc., to provide more precise guidance for the actual assembly process.

[0117] As can be seen from the above, the assembly method of the rebuilt shield machine includes: obtaining basic detection information of each main bearing component obtained by disassembling the main bearing, so as to determine the alternative usable components and unusable components from each main bearing component; the basic detection information includes appearance information, surface hardness data and internal damage information; using laser tracking technology to obtain the three-dimensional position data of multiple measurement points of each alternative usable component, the shield machine main shaft and the shield body of the shield machine, so as to generate a three-dimensional model of each alternative usable component, the shield machine main shaft and the shield body of the shield machine; obtaining the standard three-dimensional position data of the standard parts corresponding to each unusable component Model; use the three-dimensional models of various alternative available parts, the shield machine main shaft and the shield body of the shield machine and the standard three-dimensional models of various unusable parts to perform simulated assembly to determine the final available parts from various alternative available parts; output assembly plan information to guide users to use the final available parts and the standard parts corresponding to other main bearing parts to assemble the remanufactured main bearing, and then use the remanufactured main bearing to assemble with the shield machine main shaft and the shield body of the shield machine; thereby accurately evaluating the actual conditions of various components of the main bearing, achieving accurate component matching, accurately screening and reusing components, and reducing maintenance costs.

[0118] refer to Figure 2 The present application provides a reconstructed shield machine assembly device, comprising:

[0119] The first screening module 1 is used to obtain basic inspection information of each main bearing component obtained by disassembling the main bearing, so as to determine the candidate usable components and unusable components from each main bearing component; the basic inspection information includes appearance information, surface hardness data and internal damage information (for the specific process, refer to step A1 above);

[0120] The three-dimensional model building module 2 is used to obtain the three-dimensional position data of multiple measurement points of each candidate available component, the shield machine main shaft and the shield body of the shield machine by using laser tracking technology, so as to generate a three-dimensional model of each candidate available component, the shield machine main shaft and the shield body of the shield machine (the specific process refers to step A2 above);

[0121] The first acquisition module 3 is used to acquire the standard three-dimensional model of the standard part corresponding to each unusable component (refer to the above step A3 for the specific process);

[0122] A simulation screening module 4 is used to simulate assembly using the three-dimensional models of the various candidate available parts, the shield machine main shaft and the shield body, and the standard three-dimensional models of the various unavailable parts, so as to determine the final available parts from the various candidate available parts (for the specific process, refer to step A4 above);

[0123] Output module 5 is used to output assembly plan information to guide the user to use the final available parts and the standard parts corresponding to other main bearing parts to assemble the remanufactured main bearing, and then assemble the remanufactured main bearing with the shield machine main shaft and shield body (for the specific process, refer to step A5 above).

[0124] In some preferred embodiments, the reconstructed shield machine assembly device further comprises:

[0125] The first updating module is used to extract characteristic assembly parameters of each alternative available component, the shield machine main shaft and the shield body of the shield machine according to the three-dimensional models of each alternative available component, the shield machine main shaft and the shield body of the shield machine, so as to update the list of alternative available components and unavailable components; the characteristic assembly parameters include at least one of roundness, flatness and diameter (for the specific process, refer to step A6 above).

[0126] In some preferred embodiments, the reconstructed shield machine assembly device further comprises:

[0127] The second updating module is used to obtain the usage time and reference service life of each candidate available component, and update the list of candidate available components and unavailable components by comparing the usage time and reference service life (for the specific process, refer to step A7 above).

[0128] Please refer to Figure 3 , Figure 3 This is a structural schematic diagram of an electronic device provided in an embodiment of the present application. The present application provides an electronic device, including: a processor 301 and a memory 302. The processor 301 and the memory 302 are interconnected and communicate with each other through a communication bus 303 and / or other forms of connection mechanisms (not shown). The memory 302 stores a computer program executable by the processor 301. When the electronic device is running, the processor 301 executes the computer program to execute the method for assembling a rebuilt shield machine in any optional implementation of the above-mentioned embodiment to achieve the following functions: obtaining basic detection information of each main bearing component obtained by disassembling the main bearing, so as to determine alternative available components and unavailable components from each main bearing component; the basic detection information includes appearance information information, surface hardness data and internal damage information; use laser tracking technology to obtain the three-dimensional position data of multiple measuring points of each alternative available component, shield machine main shaft and shield machine shield body, so as to generate the three-dimensional model of each alternative available component, shield machine main shaft and shield machine shield body; obtain the standard three-dimensional model of the standard part corresponding to each unavailable component; use the three-dimensional model of each alternative available component, shield machine main shaft and shield machine shield body and the standard three-dimensional model of each unavailable component to perform simulated assembly to determine the final available component from each alternative available component; output assembly plan information to guide the user to use the final available component and the standard parts corresponding to other main bearing components to assemble the remanufactured main bearing, and then use the remanufactured main bearing to assemble with the shield machine main shaft and shield machine shield body.

[0129] The embodiment of the present application provides a computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, the method for reconstructing a shield machine assembly in any optional implementation of the above embodiment is executed to achieve the following functions: obtaining basic detection information of each main bearing component obtained by disassembling the main bearing, so as to determine the candidate usable components and unusable components from each main bearing component; the basic detection information includes appearance information, surface hardness data and internal damage information; using laser tracking technology to obtain multiple measurement points of each candidate usable component, the shield machine main shaft and the shield body of the shield machine; The three-dimensional position data is used to generate three-dimensional models of various alternative available components, the shield machine main shaft and the shield body of the shield machine; obtain the standard three-dimensional model of the standard parts corresponding to each unavailable component; use the three-dimensional models of various alternative available components, the shield machine main shaft and the shield body of the shield machine and the standard three-dimensional model of each unavailable component to perform simulated assembly to determine the final available components from various alternative available components; output assembly plan information to guide the user to use the final available components and the standard parts corresponding to other main bearing components to assemble the remanufactured main bearing, and then assemble the remanufactured main bearing with the shield machine main shaft and the shield body of the shield machine.

[0130] Among them, the computer-readable storage medium can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable red-only memory (PROM), read-only memory (ROM), magnetic storage, flash memory, magnetic disk or optical disk.

[0131] In the embodiments provided in the present application, it should be understood that the disclosed devices and methods can be implemented in other ways. The device embodiments described above are merely schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some communication interfaces, and the indirect coupling or communication connection of the devices or units can be electrical, mechanical or other forms.

[0132] In addition, the units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, and may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0133] Furthermore, the functional modules in the various embodiments of the present application may be integrated together to form an independent part, or each module may exist separately, or two or more modules may be integrated to form an independent part.

[0134] In this document, relational terms such as first and second, etc. are used merely to distinguish one entity or operation from another entity or operation, but do not necessarily require or imply any such actual relationship or order between these entities or operations.

[0135] The above description is only an embodiment of the present application and is not intended to limit the protection scope of the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A method for assembling a rebuilt shield machine, characterized in that: Includes steps: A1. Obtaining basic inspection information of each main bearing component obtained by disassembling the main bearing, so as to determine the candidate usable components and unusable components from each of the main bearing components; the basic inspection information includes appearance information, surface hardness data and internal damage information; A2. Using laser tracking technology to obtain the three-dimensional position data of multiple measurement points of each of the alternative available components, the shield machine main shaft and the shield body of the shield machine, so as to generate a three-dimensional model of each of the alternative available components, the shield machine main shaft and the shield body of the shield machine; A3. Obtaining a standard three-dimensional model of a standard part corresponding to each of the unusable components; A4. Performing a simulated assembly using the three-dimensional models of each of the alternative available components, the shield machine main shaft and the shield body of the shield machine and the standard three-dimensional models of each of the unavailable components to determine the final available components from each of the alternative available components; A5. Output assembly plan information to guide the user to assemble the remanufactured main bearing using the final usable components and the standard parts corresponding to other main bearing components, and then assemble the remanufactured main bearing with the shield machine main shaft and the shield body of the shield machine; Step A4 includes: A401. Perform simulated assembly using the three-dimensional models of the alternative available components, the main shaft of the shield machine and the shield body of the shield machine and the standard three-dimensional models of the unavailable components; A402. If the simulated assembly process shows assembly mismatch, execute: determining the alternative available component involved in the assembly mismatch as a component to be replaced; sorting the parts to be replaced in ascending order according to price; After removing the first-ranked to-be-replaced component from the list of candidate available components and adding it to the list of unavailable components, returning to step A401; A403. If no assembly mismatch occurs during the simulated assembly process, the simulated assembly is terminated, and the alternative available parts remaining in the list of alternative available parts are determined as final available parts.

2. The method for assembling a rebuilt shield machine according to claim 1, characterized in that: Step A1 includes: Acquiring appearance information of each of the main bearing components through appearance inspection to determine whether the appearance of each of the main bearing components is qualified; the appearance information includes at least one of rust information, crack information and pitting information; Acquiring surface hardness data of each main bearing component through hardness testing to determine whether the hardness of each main bearing component is qualified; Obtaining internal damage information of each main bearing component through flaw detection to determine whether the internal damage of each main bearing component is qualified; The main bearing components with qualified appearance, qualified hardness and qualified internal damage are determined as candidate usable components, and other main bearing components are determined as unusable components, and a list of candidate usable components and unusable components is generated.

3. The method for assembling a rebuilt shield machine according to claim 1, characterized in that: Step A2 includes: After affixing positioning targets to a plurality of measuring points on the surface of each of the optional available components, the shield machine main shaft and the shield body of the shield machine, using a laser tracker to obtain the three-dimensional position data of each of the positioning targets, and obtaining the three-dimensional position data of the corresponding measuring points; A three-dimensional model of each of the alternative available components, the main shaft of the shield machine and the shield body of the shield machine is generated in the three-dimensional measurement software according to the three-dimensional position data of each of the measurement points.

4. The method for assembling a rebuilt shield machine according to claim 2, characterized in that: After step A2 and before step A3, the method further includes the following steps: A6. Extract characteristic assembly parameters of each of the candidate available components, the shield machine main shaft and the shield body of the shield machine according to the three-dimensional models of each of the candidate available components, the shield machine main shaft and the shield body of the shield machine, so as to update the list of candidate available components and unavailable components; The feature assembly parameter includes at least one of roundness, flatness and diameter.

5. The method for assembling a rebuilt shield machine according to claim 2, characterized in that: After step A2 and before step A3, the method further includes the following steps: A7. Obtain the usage time and reference service life of each of the candidate available components, and update the list of the candidate available components and the unavailable components by comparing the usage time and the reference service life.

6. The method for assembling a rebuilt shield machine according to claim 1, characterized in that: The assembly plan information includes a list of finally available components, a list of unavailable components, and reasons why each unavailable component is unavailable.

7. A reconstructed shield machine assembly device, characterized in that: include: A first screening module is used to obtain basic detection information of each main bearing component obtained by disassembling the main bearing, so as to determine the candidate usable components and unusable components from each of the main bearing components; the basic detection information includes appearance information, surface hardness data and internal damage information; A three-dimensional model building module, used to obtain three-dimensional position data of multiple measurement points of each of the alternative available components, the shield machine main shaft and the shield body of the shield machine by using laser tracking technology, so as to generate a three-dimensional model of each of the alternative available components, the shield machine main shaft and the shield body of the shield machine; A first acquisition module is used to acquire a standard three-dimensional model of a standard part corresponding to each of the unusable components; A simulation screening module, used for performing simulation assembly using the three-dimensional models of the shield machine main shaft and the shield body of the shield machine and the standard three-dimensional models of the unusable parts to determine the final usable parts from the various alternative usable parts; An output module is used to output assembly plan information to guide the user to assemble the remanufactured main bearing with the final usable components and the standard parts corresponding to other main bearing components, and then assemble the remanufactured main bearing with the shield machine main shaft and the shield body of the shield machine; The simulation screening module performs the following when performing simulation assembly using the three-dimensional models of the shield machine main shaft and the shield body of the shield machine and the standard three-dimensional models of the unusable components to determine the final usable components from the various alternative usable components: A401. Perform simulated assembly using the three-dimensional models of the alternative available components, the main shaft of the shield machine and the shield body of the shield machine and the standard three-dimensional models of the unavailable components; A402. If the simulated assembly process shows assembly mismatch, execute: determining the alternative available component involved in the assembly mismatch as a component to be replaced; sorting the parts to be replaced in ascending order according to price; After removing the first-ranked to-be-replaced component from the list of candidate available components and adding it to the list of unavailable components, returning to step A401; A403. If no assembly mismatch occurs during the simulated assembly process, the simulated assembly is terminated, and the alternative available parts remaining in the list of alternative available parts are determined as final available parts.

8. An electronic device, characterized in that: It comprises a processor and a memory, wherein the memory stores a computer program executable by the processor, and when the processor executes the computer program, it runs the steps in the method for assembling a rebuilt shield machine as described in any one of claims 1 to 6.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method for assembling a reconstructed shield machine as described in any one of claims 1 to 6 are executed.

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