Method and device for pre-welding shape and size detection and correction of rocket tank wall plate

Abstract

This invention provides a method and equipment for pre-welding dimensional and positional inspection and correction of rocket propellant tank wall panels. It includes a laser dimensional and positional scanning device, a worktable, an automatic anti-deformation correction device, and a stress-relieving heat treatment auxiliary correction device. The laser scanner performs dimensional and positional inspection of long wall panels in segments via a traversing carriage and automatically determines whether they meet product technical requirements. The worktable with a large arc curvature and the automatic anti-deformation correction device are used in combination to perform anti-deformation correction on long wall panels with large curvature. This invention can quickly and accurately detect the dimensional and positional dimensions of long wall panels and automatically determine whether the dimensional and positional dimensions of the long wall panels are qualified according to design requirements. It can also perform anti-deformation correction on wall panels with excessive curvature to the required curvature.

Description

Technical Field

[0001] This invention belongs to the fields of laser scanning and anti-deformation correction. Specifically, it relates to a method and equipment for pre-welding shape and dimension detection and correction of rocket propellant tank wall panels. Background Technology

[0002] Welding is one of the main connection methods for rocket structures, and the quality and quantity of welds directly affect the reliability of the rocket structure. As a major structure of the rocket, the propellant tank accounts for approximately two-thirds of the total rocket length. Currently, the length of a single propellant tank section in my country is generally less than 2 meters. For most propellant tanks, multiple sections need to be welded together to meet the length requirements. Using longer sections can reduce the number of section wall panels and circumferential welds, thereby improving manufacturing precision, load-bearing capacity, and product reliability. Foreign rockets such as the H-2B, Delta-4, and Vulcan all use propellant tank sections exceeding 4 meters in length, achieving good results in terms of product quality, development efficiency, and cost.

[0003] To reduce the number of rocket propellant tank wall panels and circumferential welds, thereby improving manufacturing precision, load-bearing capacity, and product reliability, friction stir welding (FSW) is employed for longitudinal seam welding of long wall panels. FSW utilizes the heat generated by the friction between a high-speed rotating welding tool and the workpiece to locally melt the materials being welded. As the welding tool moves forward along the welding interface, the plasticized material flows from the front to the rear of the welding tool under the rotational friction force, forming a dense solid-phase weld under the pressure of the tool. FSW welded joints exhibit minimal microstructural changes in the heat-affected zone, low residual stress, and are less prone to deformation. They can complete long welds and large cross-sections in a single operation and are widely used for longitudinal seam welding of aluminum alloy rocket propellant tank wall panels.

[0004] However, friction stir welding requires high precision in workpiece assembly. When the workpiece dimensions and machining accuracy do not meet the requirements, welding cannot be performed or the welding quality is poor. Therefore, the pre-welding dimensional inspection of long panels is particularly important. This not only affects whether the welding can proceed smoothly, but also directly reflects whether the panel's dimensions meet the design requirements. Secondly, long panels are large, making manual inspection inefficient, and human factors can affect the judgment. Finally, aluminum alloy long panels often exhibit insufficient curvature during the rolling bending process. If the curvature is small, it can be returned to the rolling bending process for reprocessing, but if the curvature is too large, rework is not possible.

[0005] A search of existing technologies reveals that current inspections primarily focus on welded structures, lacking pre-welding dimensional and positional inspections of the wall panels. Furthermore, in invention patent CN118616523A, a precise alignment device and method for tank wall panels are disclosed. The precise alignment device consists of a feeding mechanism, a support device, a hydraulic system, a motion system, a control system, and measuring tools. When using this device to precisely align the wall panels, a three-point bending method is required to perform forward or reverse alignment of the area to be aligned. This process has low efficiency and low reliability in terms of alignment.

[0006] Therefore, there is an urgent need to invent a method and equipment for detecting and correcting the shape and dimensions of rocket tank wall panels before welding to solve the above problems. Summary of the Invention

[0007] To address the shortcomings of existing technologies, the purpose of this invention is to provide a method and equipment for pre-welding dimensional and positional inspection and correction of rocket propellant tank wall panels.

[0008] According to the present invention, an apparatus for pre-welding shape and dimension detection and correction of rocket propellant tank wall panels includes: a laser shape and dimension scanning device 1 and a worktable 2;

[0009] The wall panel 100 is placed on the worktable 2, with the heading of the wall panel 100 aligned with the axis of the worktable 2 and located in the middle of the worktable 2; the laser shape and size scanning device 1 is connected above the worktable 2 and can perform segmented scanning of the wall panel 100 with different lengths and curvatures.

[0010] Preferably, the laser shape and size scanning device 1 includes: a power vehicle 121, a crossbar 122, and a docking platform 123;

[0011] The workbench 2 is equipped with slide rails 11 on both sides, and each of the two slide rails 11 has a power car 121. The two power cars 121 are linked by computer control to form a traverse trolley 12.

[0012] The power vehicles 121 are connected by a crossbar 122 with a translation track. A docking platform 123 is mounted on the translation track of the crossbar 122, and the docking platform 123 can move along the translation track of the crossbar 122.

[0013] A laser scanner 13 is mounted on the mounting surface of the docking platform 123, and the laser scanner 13 faces the worktable 2. The laser scanner 13 can rotate around the mounting surface of the docking platform 123 at multiple angles to adapt to changes in the curvature of the wall panel and to scan narrow areas.

[0014] Preferably, when the curvature of the wall panel is small, it is transferred to the rolling bending process, and the shape and size are re-inspected after the rolling bending repair is completed.

[0015] Preferably, when the curvature of the wall panel 100 is large, the laser shape and size scanning device 1 located above the workbench 2 is removed, and an automatic anti-deformation correction device 3 is set, including a correction force stringer 31 and a hydraulic press 32.

[0016] The straightening force-applying stringer 31 is connected to the hydraulic presses 32 at the front and rear ends of the workbench 2 along the yaw direction of the wall panel 100. Two hydraulic presses 32 are fixed at the front and rear ends of the workbench 2. A set of hydraulic presses 32 and matching straightening force-applying stringers 31 are arranged at equal intervals along the arc direction of the workbench 2.

[0017] Control the stroke and force of each hydraulic press 32 to straighten the wall panel 100 with the straightening force stringer 31 to achieve the preset anti-deformation amount and hold the pressure for the preset time.

[0018] Preferably, the contact surface between the straightening force stringer 31 and the wall panel 100 is made of heat-resistant rubber. This avoids damage and indentation to the wall panel 100 during the reverse deformation straightening process, and allows for stress-relieving heat treatment to assist in the straightening process.

[0019] Preferably, it also includes a stress-relieving heat treatment auxiliary orthopedic device 4;

[0020] The workbench 2 is equipped with heating copper pipes 41 and temperature sensors 42; it can feed back the temperature of each part to the computer in real time. The computer controls the working power and time of the heating copper pipes 41 at each position according to the real-time temperature of each part, and performs stress relief heat treatment on the wall panel 100 to achieve better straightening effect and shorten the anti-deformation straightening time.

[0021] Preferably, the laser shape and size scanning device 1 is detachably connected above the worktable 2.

[0022] Preferably, based on multiple sets of dimensional data of the corrected wall panel 100, a neural network algorithm is used to conduct autonomous learning, which can determine the combined influence of the inverse deformation amount-time correction curve and the temperature-time stress relief heat treatment curve on the correction result of the wall panel 100, and then continuously optimize the two curves.

[0023] Preferably, the heat-resistant rubber on the contact surface between the straightening force-applying stringer 31 and the wall panel 100 is silicone rubber or vulcanized rubber.

[0024] A method for pre-welding dimensional and positional inspection and correction of rocket propellant tank wall panels includes the following steps:

[0025] Step 1: The wall panel 100 with an actual arc curvature of K2 is placed on the workbench 2 with an arc curvature of K1. When placed, the heading of the wall panel 100 is consistent with the axis of the workbench 2. The workbench 2 has a built-in stress relief heat treatment auxiliary straightening device 4.

[0026] Step 2: Both sides of the workbench 2 are equipped with slide rails 11. The traverse trolley 12 in the laser shape and position scanning device 1 moves along the slide rails 11. The laser shape and position scanning device 1 includes two power cars 121, a crossbar 122 with a translation track, and a docking platform 123 that moves along the translation track on the crossbar 122. The laser scanner 13 is installed on the docking platform 123 to scan the shape and position data of the wall panel.

[0027] Step 3: Based on the scanned data, the modeling software automatically creates a model. This actual model is compared with the standard size model. The geometric dimension database automatically judges the product size according to the technical requirements. If the product error range exceeds the requirements, it is switched to manual judgment. The inspector judges the out-of-tolerance location. If it meets the design requirements, has no impact on subsequent operations, or can be corrected in subsequent operations, a concession acceptance form is issued, and the panel is 100% normally transferred to the next process. If it cannot be accepted with a concession, the process personnel judge whether it should be reworked or scrapped.

[0028] Step 4: If the curvature K2 of the wall panel is small, it will be transferred to the rolling bending process. After the rolling bending repair is completed, the shape and position dimensions will be checked again, and steps 1, 2 and 3 above will be repeated.

[0029] If the curvature K2 of the wall panel 100 is large, remove the laser shape and position dimension scanning device 1 located above the workbench 2. The straightening force stringer 31 is connected to the hydraulic press 32 at both ends of the workbench 2 along the flight direction of the wall panel 100. Two hydraulic presses 32 are fixed at both ends of the workbench 2. A set of hydraulic presses 32 and matching straightening force stringers 31 are set at equal intervals along the arc direction of the workbench 2.

[0030] Based on the dimensional scanning results of the wall panel 100, the anti-deformation correction database outputs the anti-deformation amount-time correction curve of the wall panel 100, controls the stroke and force of each hydraulic press 32, so that the correction stringers 31 correct the wall panel 100 to achieve the preset anti-deformation amount and hold the pressure for the preset time.

[0031] Compared with the prior art, the present invention has the following beneficial effects:

[0032] 1. This invention can quickly and accurately detect the shape and size of long wall panels and automatically determine whether the shape and size of the wall panels are qualified according to the design requirements. It can also perform reverse deformation correction on wall panels with excessive curvature to correct the curvature to the required curvature.

[0033] 2. The laser shape and position dimension scanning device of the present invention can perform comprehensive, detailed and efficient scanning of the shape and position dimensions of long wall panels, and perform automatic judgment, thereby improving detection efficiency, reducing inspection errors caused by human factors, and ensuring the quality of subsequent longitudinal seam friction stir welding of wall panels.

[0034] 3. This invention combines a worktable with a large arc curvature and an automatic anti-deformation correction device. Based on an anti-deformation correction database for different materials, it outputs an anti-deformation amount-time correction curve, which can perform anti-deformation correction on wall panels with large curvature.

[0035] 4. The built-in heat treatment device of this invention, in order to achieve better anti-deformation correction effect and shorten anti-deformation correction time, performs stress-relief heat treatment on the wall panel according to the temperature-time stress-relief heat treatment curve output by the stress-relief heat treatment database, so as to achieve better correction effect and complete the correction of long wall panels efficiently, safely and at low cost. Attached Figure Description

[0036] Other features, objects, and advantages of the present invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0037] Figure 1 This is a schematic flowchart of the method for detecting and correcting the shape and position dimensions of rocket propellant tank wall panels before welding according to the present invention;

[0038] Figure 2 This is a schematic diagram of the structure of the laser shape and size scanning device of the present invention;

[0039] Figure 3 This is a schematic diagram of the automatic anti-deformation straightening device of the present invention;

[0040] Figure 4 This is a top cross-sectional view of the stress-relieving heat treatment-assisted orthopedic device of the present invention.

[0041] Figure 5 This is the anti-deformation amount-time correction curve of the present invention;

[0042] Figure 6 To develop a temperature-time stress-relief heat treatment curve.

[0043] The diagram shows:

[0044] Detailed Implementation

[0045] The present invention will now be described in detail with reference to specific embodiments. These embodiments will help those skilled in the art to further understand the present invention, but do not limit the invention in any way. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all fall within the protection scope of the present invention.

[0046] To reduce the number of rocket propellant tank section wall panels and circumferential welds, thereby improving manufacturing precision, load-bearing capacity, and product reliability, friction stir welding is used to complete the longitudinal seam welding of the long wall panels. To avoid the long wall panels failing to meet design requirements in terms of shape and dimension, precise dimensional inspection is required before welding. However, the large size of the long wall panels makes manual inspection inefficient, time-consuming, and prone to errors due to human factors. Furthermore, during the rolling bending process, the curvature of the long wall panels can easily exceed requirements; if the curvature is too large, it cannot be reduced through rolling.

[0047] To address the aforementioned issues, this embodiment provides a method and equipment for pre-welding dimensional and positional inspection and correction of rocket propellant tank wall panels, applicable to both laser scanning and anti-deformation correction fields. This embodiment uses the pre-welding dimensional and positional inspection and correction of wall panels as an example. Wall panel 100 has a diameter of 3800mm, a length of 6400mm, and an outer arc length of 2984.5mm, which is one-quarter of the total circumference of the cylinder section. The standard curvature of wall panel 100 with a diameter of 3800mm is K = 1 / R = 1 / 1900.

[0048] Specifically, in this embodiment, the wall panel 100 with an actual curvature of K2 is placed on the workbench 2 with a curvature of K1 = 1 / 2050. The yaw of the wall panel 100 is consistent with the axis of the workbench 2 and is located in the middle of the workbench 2. The length of the workbench 2 is 9800mm.

[0049] Specifically, slide rails 11 are mounted on both sides of the worktable 2, and a motorized vehicle 121 is mounted on each of the two slide rails 11. The two motorized vehicles 121 are linked by computer control to form a traversing trolley 12. The motorized vehicles 121 are connected by a crossbar 122 with a translation track. A docking platform 123 is mounted on the translation track of the crossbar 122, and the docking platform 123 can move along the translation track of the crossbar 122. A laser scanner 13 is mounted on the mounting surface of the docking platform 123, facing the worktable 2. The laser scanner 13 can rotate around the mounting surface of the docking platform 123 at multiple angles to adapt to changes in the curvature of the wall panel and to scan narrow areas.

[0050] Specifically, such as Figure 2As shown, the traverse trolley 12 moves along the slide rails 11 on both sides of the worktable 2 to the upper end of the wall panel 100 and stops. The laser scanner 13 moves along the translation track of the crossbar 122 with the docking platform 123 and begins to scan the shape and position dimensions of that area of ​​the wall panel 100. The scanned data is transmitted to the computer modeling and processing software in real time. Since the wall panel 100 has a 90° circumferential arc surface, in order to adapt to the curvature change of the wall panel 100 and to perform a comprehensive scan of the narrow grid area of ​​the wall panel 100, the laser scanner 13 can be rotated circumferentially around the mounting surface of the docking platform 123. After completing the scanning of the shape and position dimensions of that area of ​​the wall panel 100, the traverse trolley 12 continues to move along the slide rails 11 on both sides of the worktable 2 to the next unscanned area. The computer repeats the above operation to complete the scanning of all shape and position dimensions of the wall panel 100.

[0051] Specifically, after scanning, computer modeling software creates an actual model of the wall panel 100 based on the scanned data. This actual model is compared with the standard model of the wall panel to determine the out-of-tolerance data. The dimensional database automatically judges the dimensional requirements of the wall panel 100. If the technical requirements are met, the wall panel 100 proceeds to the next process. If the product error range exceeds the requirements, it is switched to manual judgment. Inspectors determine the out-of-tolerance location. If it meets the design requirements, has no impact on subsequent operations, or can be corrected in subsequent operations, a concession acceptance form is issued, and the wall panel 100 proceeds normally to the next process. If concession acceptance is not possible, process personnel determine whether it should be reworked or scrapped.

[0052] Specifically, if wall panel 100 is beyond repair or the repair cost exceeds the limit, wall panel 100 shall be scrapped. If wall panel 100 meets the repair conditions, it shall be repaired according to the repair plan. After the repair is completed, the above-mentioned tests shall be repeated until the technical requirements are met and wall panel 100 proceeds to the next process or is scrapped.

[0053] Specifically, if the curvature K2 of the wall panel is small, it will be transferred to the rolling bending process. After the rolling bending repair is completed, the shape and position dimensions will be checked again.

[0054] Specifically, if the curvature K2 of the wall panel 100 is large, remove the laser shape and position scanning device 1 located above the workbench 2, and connect the straightening force-applying stringer 31 along the yaw direction of the wall panel 100 to the hydraulic presses 32 at both ends of the workbench 2. Two hydraulic presses 32 are grouped together and fixed at both ends of the workbench 2. A group of hydraulic presses 32 and corresponding straightening force-applying stringers 31 are installed every 10° along the curvature direction of the workbench 2. Figure 3 As shown. Based on the dimensional scanning results of panel 100, the anti-deformation amount-time correction curve of panel 100 is output from the anti-deformation correction database, as shown. Figure 5As shown, the stroke and force of each hydraulic press 32 are controlled to straighten the wall panel 100 by the straightening force stringer 31, so as to achieve the preset anti-deformation amount and hold the pressure for the preset time.

[0055] Specifically, the contact surface between the straightening force-applying strut 31 and the wall panel 100 is made of heat-resistant rubber. This serves two purposes: firstly, it prevents indentations and damage to the wall panel 100 during the reverse deformation straightening process; secondly, it allows for stress-relief heat treatment to assist in the straightening process, and the physicochemical properties of the heat-resistant rubber do not change at this stress-relief heat treatment temperature. The heat-resistant rubber material is either silicone rubber or vulcanized rubber.

[0056] Specifically, while performing anti-deformation straightening, the stress-relieving heat treatment auxiliary straightening function can be activated. Heating copper tubes 41 are rationally distributed inside the workbench 2, and temperature sensors 42 are installed at various points on the workbench 2 to provide real-time temperature feedback to the computer. Based on the temperature-time stress-relieving heat treatment curve output from the stress-relieving heat treatment database, the computer controls the working power and time of the heating copper tubes 41 at each location according to the real-time temperature, performing stress-relieving heat treatment on the wall panel 100 to achieve better straightening results and shorten the anti-deformation straightening time. After straightening, the dimensional and positional measurements are re-checked.

[0057] Specifically, the stress-relieving heat treatment temperature will not change the physicochemical properties of the cylinder section material.

[0058] Specifically, based on multiple sets of dimensional data of the corrected wall panel 100, a neural network algorithm is used to conduct autonomous learning to obtain the combined influence of the inverse deformation amount-time correction curve and the temperature-time stress relief heat treatment curve on the correction result of the wall panel 100, and the two curves are continuously optimized.

[0059] The method of the present invention for pre-welding dimensional and positional inspection and correction of rocket propellant tank wall panels includes the following steps:

[0060] Step 1: The wall panel 100 with an actual arc curvature of K2 is placed on the workbench 2 with an arc curvature of K1. When placed, the heading of the wall panel 100 is consistent with the axis of the workbench 2. The workbench 2 has a stress-relieving heat treatment auxiliary straightening device 4 built in it; K1 is slightly larger than the standard curvature K of the wall panel.

[0061] Step 2: Both sides of the workbench 2 are equipped with slide rails 11. The traverse trolley 12 in the laser shape and position scanning device 1 moves along the slide rails 11. The laser shape and position scanning device 1 includes two power cars 121, a crossbar 122 with translation rails, and a docking platform 123 that moves along the translation rails on the crossbar 122. The laser scanner 13 is installed on the docking platform 123 to scan the shape and position data of the wall panel.

[0062] Step 3: Based on the scanned data, the modeling software automatically creates a model. This actual model is compared with the standard size model. The geometric dimension database automatically judges the product size according to the technical requirements. If the product error range exceeds the requirements, it is switched to manual judgment. The inspector judges the out-of-tolerance locations. If it meets the design requirements, has no impact on subsequent operations, or can be corrected in subsequent operations, a concession acceptance form is issued, and the panel is 100% normally transferred to the next process. If it cannot be accepted with concessions, the process personnel judge whether it is reworked or scrapped.

[0063] Step 4: If the curvature K2 of the wall panel is small, it will be transferred to the rolling bending process. After the rolling bending repair is completed, the shape and position dimensions will be checked again, and steps 1, 2 and 3 above will be repeated.

[0064] If the curvature K2 of the wall panel 100 is large, remove the laser shape and position dimension scanning device 1 located above the workbench 2. The straightening force stringer 31 is connected to the hydraulic press 32 at both ends of the workbench 2 along the yaw direction of the wall panel 100. Two hydraulic presses 32 are fixed at both ends of the workbench 2. A set of hydraulic presses 32 and matching straightening force stringers 31 are set every 12° along the arc direction of the workbench 2.

[0065] Based on the dimensional scanning results of the wall panel 100, the anti-deformation correction database outputs the anti-deformation amount-time correction curve of the wall panel 100, controls the stroke and force of each hydraulic press 32, so that the correction stringers 31 correct the wall panel 100 to achieve the preset anti-deformation amount and hold the pressure for the preset time.

[0066] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, 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 application.

[0067] Specific embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the specific embodiments described above, and those skilled in the art can make various changes or modifications within the scope of the claims, which do not affect the essence of the present invention. Unless otherwise specified, the embodiments and features described in this application can be arbitrarily combined with each other.

Claims

1. A device for pre-welding dimensional and positional inspection and correction of rocket propellant tank wall panels, characterized in that, include: Laser shape and size scanning device (1), worktable (2); The wall panel (100) is placed on the workbench (2), with the heading of the wall panel (100) aligned with the axis of the workbench (2) and located in the middle of the workbench (2); the laser shape and size scanning device (1) is connected above the workbench (2) and can perform segmented scanning of wall panels (100) of different lengths and curvatures. The laser shape and size scanning device (1) includes: a power vehicle (121), a crossbar (122), and a docking platform (123); The workbench (2) is equipped with slide rails (11) on both sides. There is a power car (121) on each of the two slide rails (11). The two power cars (121) are linked by computer control to form a directional translation car (12). The power vehicles (121) are connected by a crossbar (122) with a translation track. A docking platform (123) is mounted on the translation track of the crossbar (122), which can move along the translation track of the crossbar (122). A laser scanner (13) is mounted on the mounting surface of the docking platform (123), and the laser scanner (13) faces the worktable (2); the laser scanner (13) can rotate around the mounting surface of the docking platform (123) at multiple angles; If the curvature of the wall panel (100) is less than the first set threshold, it will be transferred to the rolling bending process. After the rolling bending repair is completed, the shape and position dimensions will be checked again. If the curvature of the wall panel (100) is greater than the second set threshold, the laser shape and size scanning device (1) located above the worktable (2) can be removed and replaced with an automatic anti-deformation correction device (3); wherein the second set threshold is greater than the first set threshold; The automatic anti-deformation straightening device (3) includes a straightening force-applying stringer (31) and a hydraulic press (32); The straightening force-applying stringer (31) is connected to the hydraulic press (32) at both ends of the workbench (2) along the direction of the wall panel (100). The hydraulic press (32) is fixed in pairs at both ends of the workbench (2). A set of hydraulic presses (32) and matching straightening force-applying stringers (31) are set at equal intervals along the arc direction of the workbench (2). Control the stroke and force of each hydraulic press (32) so that the straightening force stringer (31) straightens the wall panel (100) to achieve the preset anti-deformation amount and hold the pressure for the preset time.

2. The equipment for pre-welding dimensional and positional inspection and correction of rocket propellant tank wall panels according to claim 1, characterized in that, The contact surface between the straightening force-applying truss (31) and the wall panel (100) is made of heat-resistant rubber.

3. The equipment for pre-welding dimensional and positional inspection and correction of rocket propellant tank wall panels according to claim 1, characterized in that, It also includes a stress-relieving heat treatment auxiliary orthopedic device (4); The stress-relieving heat treatment auxiliary orthopedic device (4) includes a heating copper tube (41) and a temperature sensor (42) set on the workbench (2). The temperature sensor (42) can feed back the temperature at each location to the computer in real time. The computer controls the working power and time of the heating copper tube (41) at each location according to the real-time temperature at each location, and performs stress-relieving heat treatment on the wall panel (100) to achieve better orthopedic effect and shorten the anti-deformation orthopedic time.

4. The equipment for pre-welding dimensional and positional inspection and correction of rocket propellant tank wall panels according to claim 1, characterized in that, The laser shape and size scanning device (1) is detachably connected above the worktable (2).

5. The equipment for pre-welding dimensional and positional inspection and correction of rocket propellant tank wall panels according to claim 1, characterized in that, Based on the shape and dimension data of multiple sets of corrected wall panels (100), the neural network algorithm is used for autonomous learning to obtain the combined influence of the inverse deformation amount-time correction curve and the temperature-time stress relief heat treatment curve on the correction result of the wall panel (100), and then continuously optimize the two curves.

6. The equipment for pre-welding dimensional and positional inspection and correction of rocket propellant tank wall panels according to claim 2, characterized in that, The heat-resistant rubber on the contact surface between the straightening force-applying truss (31) and the wall panel (100) is silicone rubber or vulcanized rubber.

7. A method for inspection and correction using the equipment for pre-welding dimensional and positional inspection and correction of rocket propellant tank wall panels as described in any one of claims 1 to 6, characterized in that, Includes the following steps: Step 1: The wall panel (100) with an actual arc curvature of K2 is placed on the workbench (2) with an arc curvature of K1. When placed, the heading of the wall panel (100) is consistent with the axis of the workbench (2); the workbench (2) is equipped with a stress-relieving heat treatment auxiliary straightening device (4). Step 2: The workbench (2) is equipped with slide rails (11) on both sides. The traverse trolley (12) in the laser shape and position scanning device (1) moves along the slide rails (11). The laser shape and position scanning device (1) includes two power cars (121), a crossbar (122) with a translation track, and a docking platform (123) that moves along the translation track on the crossbar (122). The laser scanner (13) is installed on the docking platform (123) to scan the shape and position data of the wall panel. Step 3: Based on the scanned data, the modeling software automatically models the actual model and compares it with the standard size model. The geometric dimension database automatically judges the product size according to the technical requirements. If the product error range exceeds the requirements, it is switched to manual judgment. The inspector judges the out-of-tolerance position. If it meets the design requirements, has no impact on subsequent operations, or can be corrected in subsequent operations, a concession acceptance form is issued, and the panel (100) is normally transferred to the next process. If it cannot be accepted with concession, the process personnel judge whether it is reworked or scrapped. Step 4: If the curvature K2 of the wall panel (100) is less than the first set threshold, it will be transferred to the rolling bending process. After the rolling bending repair is completed, the shape and position dimensions will be checked again, and the above steps 1, 2 and 3 will be repeated. If the curvature K2 of the wall panel (100) is greater than the second set threshold, wherein the second set threshold is greater than the first set threshold, then the laser shape and size scanning device (1) located above the workbench (2) is removed, and the straightening force stringer (31) is connected to the hydraulic press (32) at both ends of the workbench (2) along the yaw direction of the wall panel (100). The hydraulic presses (32) are in groups of two and fixed at both ends of the workbench (2). A set of hydraulic presses (32) and matching straightening force stringers (31) are set at equal intervals along the arc direction of the workbench (2). Based on the shape and position dimension scanning results of the wall panel (100), the anti-deformation correction database outputs the anti-deformation amount-time correction curve of the wall panel (100), controls the stroke and force of each hydraulic press (32), so that the correction force stringer (31) corrects the wall panel (100) to achieve the preset anti-deformation amount and holds the pressure for the preset time.

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