CN116728038A - Assembly integration method of high-precision neutron supermirror catheter - Google Patents

Abstract

The invention relates to an assembly integration method of a high-precision neutron supermirror catheter, which comprises the following steps: placing a plurality of neutron supermirror reflecting surfaces on a reference panel with high flatness, placing a long backboard on the reference panel, and forming a neutron guide tube wall between the long backboard and the reference panel; then the walls of the four neutron guide tubes are propped against the high-precision supporting leaning body together; and measuring to ensure the dimensional accuracy, fixing the walls of the four neutron supermirror guide pipes into a whole, completing solidification, removing the leaning body to obtain the neutron supermirror guide pipes, finally processing the high-precision processing U-shaped clamp, adjusting the relative posture between the two neutron supermirror guide pipes, and completing the assembly and adjustment of the two neutron supermirror guide pipes. Compared with the prior art, the invention has the advantages that parameters such as the caliber size, the parallelism, the perpendicularity and the like of the catheter are ensured to be in the order of tens of micrometers through real-time measurement, the flatness of the wall of the catheter reaches the order of sub-milliradian, and the high-precision leaning body can be repeatedly used, so that the invention is easy for batch production.

Description

An assembly and integration method for high-precision neutron superscope catheters

Technical field

The invention relates to the field of precision instrument and equipment manufacturing, and in particular to an assembly and integration method of a high-precision neutron superscope catheter.

Background technique

Neutron scattering technology requires the continuous generation of neutrons from a neutron source. There are currently two types of neutron sources in the world. One is the spallation neutron source, which is based on accelerator-accelerated protons bombarding a metal target to produce neutrons; the other is the reactor neutron source, which is based on uranium fission to produce neutrons. Whether it is a spallation neutron source or a reactor neutron source, it is necessary to lead as many neutrons generated by the neutron source to the outside as possible through multiple neutron superscope conduits to ensure neutron flux. Therefore, the neutron superscope catheter has become an indispensable scientific instrument and equipment in neutron physics engineering.

Due to the limitations of coating technology, currently, in neutron superscope conduits, multiple neutron superscopes are generally spliced to make a longer neutron conduit wall, and the four neutron superscope walls are further integrated into one neutron superscope. Catheter, on this basis, multiple neutron superscope catheters are assembled and used. Since the reflection of neutrons by a neutron super mirror is based on the Bragg diffraction of a multi-layer film under grazing incidence conditions, and the working cross-section of the neutron super mirror is very small under grazing incidence conditions, there is a need for neutron super mirror splicing and neutron super mirror splicing. The accuracy of catheter wall integration and neutron superscope catheter assembly (such as diameter size, parallelism, verticality and catheter wall flatness, catheter assembly accuracy, etc.) has extremely high requirements. For example, the diameter size, parallelism and perpendicularity are required to be on the order of tens of microns, and the flatness of the conduit wall is required to be on the order of sub-milliradians. This places high requirements on the assembly and integration accuracy of the neutron superscope catheter, and there is currently a lack of effective assembly and integration methods. Invention patents such as ZL201810345548.8 and ZL201911001268.6, ZL201810345551.X and ZL201810345550.5 only support and adjust the prepared neutron superscope catheter, and do not involve the high-precision assembly of the neutron superscope catheter itself.

Contents of the invention

The purpose of the present invention is to provide an assembly and integration method of a high-precision neutron superscope catheter to overcome the above-mentioned defects in the prior art. This method can realize high-precision assembly and integration of neutron superscope catheters, can be quickly implemented, and can easily realize large-scale production of neutron superscope catheters.

The object of the present invention can be achieved through the following technical solutions:

The invention provides an assembly and integration method for a high-precision neutron superscope catheter. The specific steps include:

S1: Assemble the neutron conduit wall: place at least one neutron super mirror on the reference panel, and place a long back plate on the neutron super mirror. The length of the long back plate is shorter than the total length of the neutron super mirror. The excess part of the neutron supermirror is used as the reserved neutron supermirror assembly surface. Glue is injected between the long back plate and the reference panel, and after solidification, the neutron conduit wall is obtained;

S2: Assemble the neutron superscope conduit: Repeat S1 to assemble the neutron superscope conduit walls to obtain four neutron superscope conduit walls. The four neutron superscope conduit walls are jointly pressed against the four neutron superscope conduit walls. The high-precision machining body is designed to match the dimensions of the neutron superscope conduit walls. Measure the mutual dimensions, parallelism and perpendicularity parameters of the four neutron superscope conduit walls, and adjust their accuracy to meet the design requirements, and pass the glue Fix the walls of the four neutron superscope conduits by injection or screw tightening, and then remove the high-precision processing backing body to obtain the neutron superscope conduit;

S3: Assemble two neutron superscope conduits: Repeat S2 to assemble the neutron superscope conduit to obtain two superscope conduits, and place a high-precision processing U-shaped fixture with processing dimensions consistent with the neutron superscope conduit on the Reserve the neutron super mirror mounting surface; place the two neutron super mirror conduits in sequence, and adjust the relative posture between the two neutron super mirror conduits so that the high-precision processing U-shaped fixture The reserved neutron supermirror assembly and adjustment surfaces of the two neutron supermirror conduits can be clamped at the same time to complete the assembly and adjustment of the two neutron supermirror conduits;

S4: Repeat S1 and S2 to obtain the required number of neutron superscope catheters, and repeat S3 to assemble multiple neutron superscope catheters to meet the requirements for different lengths of neutron superscope catheters.

Furthermore, in S2, the dimensional accuracy of the four neutron superscope tube walls is corrected after real-time measurement using a three-dimensional coordinate measuring instrument or laser tracker.

Further, the high-precision processing body, the neutron superscope conduit wall and the neutron superscope conduit diameter were tested using a three-dimensional coordinate measuring instrument to ensure that the neutron superscope conduit wall surface shape accuracy was in the order of hundreds of microns and in the mid-range. The diameter of the sub-ultrascope catheter is within fifty microns.

Further, a three-dimensional coordinate measuring instrument is used for calibration to establish the relative positional relationship between the target component and the target holder in the three-dimensional space. The position of the target component is adjusted by adjusting the target holder. The neutron supermirror and the The high-precision machining body is calibrated to obtain the theoretical position coordinates of the neutron superscope catheter target seat and the high-precision machining body target seat in space.

Furthermore, when performing a three-coordinate test at S2 using a three-dimensional coordinate measuring instrument after calibration, first, adjust the positioning and assemble the neutron superscope catheter, and place the neutron superscope on the catheter support steel plate fixed on the horizontal reference platform to The calibrated high-precision machining body is based on the four sides of the body, and the neutron super mirror is spliced to form a neutron super mirror conduit, and the neutron super mirror conduit is fixed; secondly, the three-coordinate test is used to test the assembled neutron super mirror conduit unit Adjust the posture: adjust the screws to make the deviation between the measured coordinates of the neutron ultrasonic microscope target base and the theoretical coordinates less than 0.05mm, then inject glue to fix the neutron ultrasonic microscope catheter; then review the glued neutron ultrasonic microscope catheter Use a three-coordinate measuring arm to measure the target base located on the inner wall of the neutron superscope catheter, review the spatial position accuracy of the core components, and determine that the coordinate error between the measured value and the theoretical value is less than 0.05mm; finally disassemble and complete the attitude adjustment. , inject glue into the glue injection port to form a fixing glue layer to achieve the fixation of the conduit. Then, let the conduit stand still. After the glue solidifies, remove the high-precision processing backing body and conduit support steel plate in sequence.

Furthermore, the neutron supermirror adopts float glass coated with Ni/Ti or Ni/N/Ti multilayer film.

Furthermore, the long back plate is made of tempered glass, stainless steel or aluminum alloy.

Furthermore, the glue is made of epoxy resin or UV-sensitive glue material.

Further, the reference panel is a reference panel using a plasticizing process.

Further, the high-precision machining backing body is injected into liquid nitrogen and cooled, and then the high-precision machining backing body is removed.

Compared with the prior art, the present invention has the following advantages:

(1) The neutron superscope splicing, neutron conduit wall integration and neutron superscope conduit assembly are highly accurate. The invention ensures the accuracy of the caliber size, parallelism, and verticality of the neutron supermirror catheter through the coordination of a high-flatness reference panel, a long back plate, a high-precision support body, and real-time measurement by a three-coordinate measuring instrument and a laser tracker. It reaches the order of tens of microns, and the flatness of the catheter wall reaches the order of sub-milliradians. Through this installation method, an ultra-high-precision neutron supermirror catheter is obtained.

(2) The high-precision body and outer tooling can be reused, making it easy to quickly realize the assembly and integration of the neutron superscope catheter, and is suitable for mass production. The neutron superscope catheter diameter and catheter length requirements for different design values can be matched by multi-dimensional adjustments of the body and external tooling. The integrated assembly method of the present invention not only ensures the high precision of the neutron supermirror catheter, but also ensures the rapidity of the process and operation. The reusable and replaceable tooling reduces the cost and solves the problem of being unable to produce in large quantities. .

Description of drawings

Figure 1 is the reflectivity curve of the multi-layer film structure of the neutron supermirror reflective surface.

Figure 2 is a schematic diagram of the splicing of the neutron superscope catheter wall.

Figure 3 is a schematic diagram of high-precision machining body and processing requirements.

Figure 4 is a schematic diagram of the splicing of the neutron superscope catheter wall.

Figure 5 is a schematic diagram of the overall structure of the neutron superscope catheter.

Figure 6 is a schematic diagram of the processing requirements for high-precision U-shaped fixture processing in the embodiment.

Figure 7 is a schematic diagram of the high-precision processing U-shaped clamp holding the neutron superscope catheter.

Figure 8 is a 3D schematic diagram of the high-precision processing of the neutron supermirror catheter wall surface (including the height of the joint).

Figure 9 is a 3D schematic diagram of the caliber of the segmented focusing catheter.

Reference symbols: 1. Long back plate; 2. Neutron super mirror; 3. High flatness reference panel; 4. Glue injection gap; 5. Reserved U-shaped fixture working surface; 6. High-precision processing of the body and center The contact surface of the neutron supermirror tube wall; 7. High-precision processing of the body; 8. High-precision processing of the U-shaped fixture; 9. High-precision processing of the contact surface between the U-shaped fixture and the neutron supermirror mounting surface.

Detailed ways

The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. Features such as component models, material names, connection structures, control methods, algorithms, etc. that are not explicitly stated in this technical solution are regarded as common technical features disclosed in the prior art.

Example 1

This embodiment provides an assembly and integration method for a high-precision neutron superscope catheter. The steps are:

S1: Assemble the neutron supermirror conduit wall: As shown in Figure 2, place two neutron supermirrors 2 on the high-flatness reference panel 3, and place the long back plate 1 on the neutron supermirror 2. The length of the long back plate 1 is shorter than the total length of the neutron super mirror 2, thereby forming a reserved U-shaped clamp working surface at both ends of the neutron super mirror conduit wall, and injecting glue between the long back plate and the high flatness reference panel The glue injection gap 4 is obtained, and after curing, the neutron superscope catheter wall is obtained;

S2: Assemble the neutron supermirror catheter: Repeat S1 to assemble the neutron supermirror catheter walls to obtain four neutron supermirror catheter walls. Place the four neutron supermirror catheter walls against the four neutron supermirror catheter walls. The contact surface 6 between the high-precision processing backing body and the neutron supermirror conduit wall is designed to match the wall design size. In this embodiment, the size design of the high-precision processing backing body 7 is shown in Figure 3. Measure the mutual relationship between the four neutron supermirror conduit walls. The size, parallelism and perpendicularity parameters between them are adjusted, and their accuracy is adjusted to meet the design requirements. As shown in Figure 4, the four neutron superscope conduit walls are fixed by glue injection or screw tightening, and then the high altitude Precisely process the body 7 to obtain the neutron superscope catheter, as shown in Figure 5;

S3: Assemble two neutron superscope conduits: Repeat S2 to assemble the neutron superscope conduits to obtain two neutron superscope conduits, and place the high-precision processing U-shaped fixture 8 whose processing size is consistent with the neutron superscope conduit. On the reserved U-shaped fixture working surface 5, the processing dimensions of the high-precision processing U-shaped fixture 8 are shown in Figure 6; as shown in Figure 7, the two neutron supermirror catheters are placed sequentially and adjusted. The relative posture between the two neutron superscope catheters, the high-precision processing U-shaped clamp 8 clamps the reserved U-shaped clamp working surface 5 of the one neutron superscope catheter, and at the same time, through high-precision processing The contact surface 9 between the U-shaped clamp and the neutron supermirror assembly and adjustment surface clamps another neutron supermirror conduit to complete the assembly and adjustment of the two neutron supermirror conduits;

S4: Repeat S1 and S2 to obtain the required number of neutron superscope catheters, and repeat S3 to assemble multiple neutron superscope catheters to meet the requirements for different lengths of neutron superscope catheters.

Among them, in order to ensure the high accuracy required by the project, the high-precision processing body, the neutron superscope conduit wall and the diameter of the neutron superscope conduit were tested using a three-dimensional coordinate measuring instrument to ensure that the accuracy of the neutron superscope conduit wall surface shape reached The caliber accuracy of the neutron superscope catheter is on the order of hundreds of microns and reaches within fifty microns. The parameters are detailed in Table 1.

Table 1 Neutron superscope catheter port diameter parameters

Specific three-coordinate testing steps include:

First: Calibration. The calibration is to establish the relative positional relationship between the target component and the target holder in the three-dimensional space. By adjusting the target holder, the position of the target component is adjusted, and the neutron supermirror 2 and high-precision machining rely on the body. 7 for calibration. First, calibrate the neutron super mirror 2: place the neutron super mirror 2 on the optical platform, use the measurement arm to measure the front and rear end surfaces of the neutron super mirror 2 and the inner surfaces of the front and rear ends, and then measure the target base on the neutron super mirror 2 , establish the spatial relationship between the internal dimensions of the neutron superscope catheter and the spatial position of the target seat on the neutron superscope 2. Since the inner wall surface of the neutron superscope catheter is processed and spliced with high precision, and the theoretical position of the inner wall surface in space is known , thus the theoretical position coordinates of the neutron superscope catheter target seat in space can be obtained.

Secondly, calibrate the high-precision processing support body 8: install the neutron super mirror 2 inside the outer support mechanism provided with the metal shell adjustment assembly to achieve basic coaxiality, and make the neutron super mirror 2 through surface contact between the two. The wall of the mirror tube and the high-precision processing backing body 8 form a whole without relative motion. Place the external support mechanism equipped with the neutron supermirror 2 on the optical platform, and use the measuring arm to measure the target base and center of the high-precision processing backing body 7. The target holder on the inner wall of the sub-superscope catheter is used to establish the theoretical position relationship between the target holders, and obtain the theoretical position coordinates of the high-precision processing target holder in space.

Then, use the drawing dimensions to directly obtain the theoretical position coordinates of the bracket target seat in space.

Second: Adjust the positioning and assemble the neutron ultrasonic microscope catheter. First, place the catheter support steel plate on the horizontal reference platform and fix it through the reference block; then place a neutron ultrasonic microscope on the catheter support steel plate, and use a calibrated high-precision The four sides of the processing support body 7 are used as a reference, and multiple pieces of the neutron supermirror 2 are spliced in sequence close to the reference surface to form a rectangular tubular neutron supermirror conduit; then the surface contact pressing mechanism is stuck at both ends of the neutron supermirror conduit. , cooperate with the threads of the neutron superscope tube support steel plate to tighten, fix the neutron superscope tube, and complete the assembly.

Third: Use the three-coordinate test to adjust the attitude of the assembled neutron superscope catheter unit, including: the position coordinates of the target base, adjusting the top adjustment screw, the left adjustment screw and the right adjustment screw. When the coordinates of the target base When the deviation between the measured value and the theoretical coordinate obtained by calibration is less than 0.05mm, the neutron supermirror 2 is installed at the theoretical position. Finally, glue is injected into the glue injection port to form a 0.5mm thick glue layer to fix the neutron superscope catheter.

Fourth: Review and disassembly, use a three-coordinate measuring arm to measure the target seat located on the inner wall of the neutron ultrasonic catheter after the glue is completed. Review the spatial position accuracy of core components. When it is determined that the coordinate error between the measured value and the theoretical value is less than 0.05mm, the installation and adjustment work is completed. If the deviation between the measured value and the theoretical value is greater than 0.05mm. It is necessary to destroy the calibration relationship between the neutron superscope catheter and the integrated device. Fine-tune the neutron superscope catheter directly via the adjustment screw in the integrated device adjustment assembly. Until the error between the measured value of the target seat on the inner wall of the neutron ultrasonic microscope tube and the theoretical value obtained by calibration is less than 0.05mm. And repeat the third step above until the requirements are met.

Fifth: Uninstall and adjust the posture. Inject glue into the glue injection port to form a fixing glue layer to secure the catheter. Finally, let the pipe stand and wait for the glue to solidify, then remove the high-precision processing backing body and pipe support steel plate in sequence.

Sixth: Assembly and adjustment. After completing the adjustment of the neutron superscope conduit, assemble the two sections of the conduit into one section. Place the high-precision processing U-shaped assembly and adjustment fixture 8 on the reserved U-shaped fixture working surface 5 at the port docking point. Place the two sections together. The neutron superscope catheters are placed sequentially, and the relative postures between the two neutron superscope catheters are adjusted so that the U-shaped clamp can simultaneously hold the two reserved U-shaped clamp working surfaces 5 to complete the two neutron superscopes. Conduit installation and adjustment.

Specifically, the parameters of the neutron superscope catheter prepared by this method are designed and completed according to the specific standards of the project. The total length of a single neutron superscope catheter is 1 meter, the diameter is 30mm×30mm, the diameter size, parallelism and The verticality requirements are on the order of tens of microns, and the flatness of the neutron superscope conduit wall is required on the order of sub-milliradians. Specific contents include:

To design a neutron supermirror, the design of the neutron supermirror requires first purchasing the substrate material (dimensional accuracy: 3mm), using a high-precision surface grinder to precision polish the substrate (dimensional accuracy: 0.2mm), and then polishing the The substrate is cleaned with multiple frequency ultrasonic waves: ultrapure water → acidic cleaning solution → ultrapure water → neutral cleaning solution → ultrapure water → nitrogen blow-drying to make the substrate waviness error ≤ 1.0×10 ^-4 ; secondly, the substrate is plated as follows The nickel-titanium film shown in Figure 1 has M=2, Rc≥87%, and uniformity ≥5%; finally, two 500mm neutron supermirrors 1 are placed upside down on the reference platform, glue is dispensed on the back of the neutron supermirror, and the The splicing device coincides the center of the back plate with the center of the neutron supermirror, and completes the splicing of the neutron supermirror unit conduit wall under the dual action of external fixation and internal adhesive, forming a neutron supermirror unit conduit wall with a total length of 1000mm. The neutron supermirror unit conduit wall meets the requirements of the joint width of the two 500mm supermirror sections ≤ 0.05mm, the height difference between the two ends of the joint ≤ 0.01mm, and the overall surface shape PV ≤ 0.1mm as shown in Figures 8 and 9. Standard; the described neutron superscope conduit meets the requirements that the parallelism of the opposite surfaces of the conduit walls of the two neutron superscope units is ≤1×10 ^-4 Rad, the verticality of the adjacent surfaces is ≤1×10 ^-4 Rad, and the conduit interface size Accuracy 0.01mm standard.

The above description of the embodiments is to facilitate those of ordinary skill in the technical field to understand and use the invention. It is obvious that those skilled in the art can easily make various modifications to these embodiments and apply the general principles described herein to other embodiments without inventive efforts. Therefore, the present invention is not limited to the above embodiments. Based on the disclosure of the present invention, improvements and modifications made by those skilled in the art without departing from the scope of the present invention should be within the protection scope of the present invention.

Claims (10)

1. The method for assembling and integrating the high-precision neutron supermirror guide tube is characterized by comprising the following specific steps of:

s1: assembling neutron conduit walls: placing at least one neutron supermirror on a reference panel, placing a long back plate on the neutron supermirror, wherein the length of the long back plate is shorter than the total length of the neutron supermirror, taking the part of the neutron supermirror, which exceeds the long back plate, as a reserved neutron supermirror mounting and adjusting surface, injecting glue between the long back plate and the reference panel, and curing to obtain a neutron guide tube wall;

s2: and (3) assembling a neutron supermirror guide pipe: repeating S1 assembling neutron supermirror duct walls to obtain four neutron supermirror duct walls, propping the four neutron supermirror duct walls against a high-precision processing leaning body matched with the design size of the neutron supermirror duct walls together, measuring the parameters of the sizes, the parallelism and the verticality of the four neutron supermirror duct walls, adjusting the precision to meet the design requirement, fixing the four neutron supermirror duct walls through glue injection or fastening pieces, and removing the high-precision processing leaning body to obtain the neutron supermirror duct;

s3: two neutron supermirror catheters are assembled: repeating S2 to assemble neutron supermirror conduits to obtain two supermirror conduits, placing a high-precision machining U-shaped clamp with machining dimensions consistent with those of the neutron supermirror conduits on the reserved neutron supermirror assembling and adjusting surfaces, sequentially placing the two neutron supermirror conduits, and adjusting relative postures between the two neutron supermirror conduits, so that the high-precision machining U-shaped clamp can clamp the reserved neutron supermirror assembling and adjusting surfaces of the two neutron supermirror conduits at the same time, and assembling and adjusting the two neutron supermirror conduits are completed;

s4: based on the target number/length assembly requirements for neutron super mirror tubes, a plurality of neutron super mirror tubes are assembled by repeating S3.

2. The method for assembling and integrating the high-precision neutron super-mirror guide tube according to claim 1, wherein in the step S2, the dimensional precision of the walls of the four neutron super-mirror guide tubes is corrected after being measured in real time by a three-coordinate measuring instrument or a laser tracker.

3. The method for assembling and integrating the high-precision neutron super-mirror guide tube according to claim 2, wherein in the step S2, the high-precision machining leaning body, the neutron super-mirror guide tube wall and the caliber of the neutron super-mirror guide tube are tested through a three-coordinate measuring instrument, so that the accuracy of the wall surface of the neutron super-mirror guide tube is hundred micrometers, and the caliber of the neutron super-mirror guide tube is within fifty micrometers.

4. The method for assembling and integrating the high-precision neutron supermirror guide tube according to claim 3, wherein in the step S2, before the three-coordinate measuring instrument performs the three-coordinate test, the three-coordinate measuring instrument is used for calibrating, the relative position relation of the target component and the target seat in the three-dimensional space is established, the position of the target component is adjusted by adjusting the target seat, the neutron supermirror and the high-precision processing leaning body are calibrated, and the theoretical position coordinates of the neutron supermirror guide tube target seat and the high-precision processing leaning body target seat in the space are obtained.

5. The method for assembling and integrating the high-precision neutron super-mirror catheter according to claim 4, wherein in the step S2, after calibration, when three-coordinate testing is performed by a three-coordinate measuring instrument, the method comprises the following steps:

t1: adjusting, positioning and assembling a neutron supermirror catheter, placing the neutron supermirror on a catheter supporting steel plate on a horizontal reference platform, splicing the neutron supermirror to form a neutron supermirror catheter by taking four sides of a calibrated qualified high-precision processing leaning body as references, and fixing the neutron supermirror catheter;

t2: and carrying out posture adjustment on the assembled neutron supermirror catheter unit by utilizing a three-coordinate test: the deviation between the coordinate measured value of the neutron supermirror target seat and the theoretical coordinate is smaller than 0.05mm, and then the neutron supermirror guide tube is fixed by glue injection;

t3: measuring a target seat on the inner wall of the neutron supermirror catheter by using a three-coordinate measuring arm after the adhesion is finished, rechecking the spatial position accuracy of the core component, and determining that the coordinate error of the measured value and the theoretical value is less than 0.05mm;

t4: after the posture is adjusted, glue is injected into the glue injection port to form a fixing glue layer, so that the fixing of the guide pipe is achieved, then the guide pipe is stood, and after the glue is solidified, the high-precision processing leaning body and the guide pipe supporting steel plate are sequentially removed.

6. The method for assembling and integrating the high-precision neutron supermirror guide tube according to claim 1, wherein in S1, the neutron supermirror is made of float glass plated with Ni/Ti or Ni/N/Ti multilayer films.

7. The method for assembling and integrating the high-precision neutron supermirror guide tube according to claim 1, wherein in the step S1, the long back plate is made of toughened glass, stainless steel or aluminum alloy materials.

8. The method for assembling and integrating the high-precision neutron supermirror guide tube according to claim 1, wherein in the step S1 and the step S2, the glue is made of epoxy resin or ultraviolet photosensitive glue material.

9. The method for assembling and integrating the high-precision neutron super-mirror guide tube according to claim 1, wherein in the step S1, the reference panel is a reference panel of a plasticizing process.

10. The method for assembling and integrating the high-precision neutron super-mirror guide tube according to claim 1, wherein in the step S2, the high-precision machining leaning body is disassembled after being injected with liquid nitrogen for cooling.