An assembly method for a key thread sleeve in a base to control the amount of sinking

Abstract

The present application relates to the field of mechanical assembly process, and particularly to an assembly method for controlling the sinking amount of key thread sleeve in a base, which groups a plurality of key thread sleeves according to the sinking amount condition simulation assembly of the base, can effectively distinguish the plurality of key thread sleeves before assembly, avoids affecting the assembly effect after assembling the inappropriate key thread sleeve in the base, and simultaneously opens a key groove at the end of the base corresponding to the locking position of the key thread sleeve according to the sinking amount of the key thread sleeve of each group, so that the base can be processed according to the grouped key thread sleeve, improves the assembly efficiency, and simplifies the process flow in the present application, can directly assemble on the base, does not need to mark the key groove position in the base in the trial assembly process, and cuts the groove on the base again, can improve the key groove machining quality on the base which is not easy to process, and solves the problem of frequent damage of manual cutting groove tools.

Description

Technical Field

[0001] This invention relates to the field of mechanical assembly technology, specifically to an assembly method for controlling the sinking of a keyed threaded sleeve within a substrate. Background Technology

[0002] In recent years, keyed threaded sleeves have been gradually adopted in the structure of components such as the casing of domestic aero-engines. The key on the sleeve is used to ensure that the key and keyway are aligned after the sleeve is installed into the threaded hole of the base. The key is inserted into the keyway along the longitudinal wall of the threaded hole to lock and fix the position of the sleeve and the mounting base.

[0003] The installation of this keyed threaded insert requires pre-assembling it into the threaded hole on the mounting base at the assembly site. After measuring and ensuring the amount of settlement between the exposed end face and the mounting surface of the base, the angular position of the key on the keyed threaded insert is determined and marked. Then, the keyed threaded insert is removed, and the threaded hole on the mounting base is machined with a keyway at the marked position. The specific process route is as follows: visual inspection - trial assembly - marking the keyway position and disassembly - manual grooving - cleaning chips - assembly - measurement.

[0004] The casing wall has over 100 threaded holes for installing this new type of keyed threaded insert. The keyed threaded insert has two evenly distributed keys on its circumference. On-site installation requires pre-assembly to determine the keyway positions, and then machining two keyways 180° opposite each other within the casing threaded holes according to the marked positions. During the development process, it was revealed that the adopted installation process was complex and inefficient, unsuitable for the large number of keyed threaded inserts. Furthermore, the manual keyway punching process on-site was unsuitable for the difficult-to-machine base material, frequently resulting in tool damage and inconsistent keyway quality. Summary of the Invention

[0005] The purpose of this invention is to provide an assembly method for controlling the sinking amount of a keyed threaded sleeve in a substrate, so as to solve the technical problems of complex process and difficult keyway processing in the existing assembly process of keyed threaded sleeves.

[0006] This invention is achieved through the following technical solution:

[0007] This invention provides an assembly method for controlling the subsidence of a keyed threaded sleeve within a substrate, comprising:

[0008] The assembly of the keyed threaded sleeve with the base was simulated. With the locking key on the keyed threaded sleeve and the preset keyway aligned with each other, the sinking amount of several keyed threaded sleeves was measured. The keyed threaded sleeves were then grouped according to the sinking amount.

[0009] The difference between the sinking range and the sinking condition of each set of keyed threaded inserts is obtained. Based on the difference, the angle between the actual keyway position and the preset keyway position required for each set of keyed threaded inserts to meet the sinking condition is determined.

[0010] Establish the keyway position relationship of the threaded hole on the substrate corresponding to the keyway position of each set of keyed threaded sleeves that meets the installation requirements based on the angle between the actual keyway position and the preset keyway position, and process the keyway on the substrate according to this position relationship.

[0011] Install the keyed threaded insert according to the keyway position of the base material. Tighten the keyed threaded insert into the threaded hole of the base material until the exposed end face of the keyed threaded insert is lower than the surface of the base material by the required amount of recess, and stop tightening when the locking key on the keyed threaded insert is aligned with the keyway position of the threaded hole of the base material. Press the locking key down along the keyway on the base material until its end is lower than the surface of the base material and flush with the exposed end face of the keyed threaded insert, thus completing the assembly of the keyed threaded insert.

[0012] Preferably, the keyed threaded sleeve is placed in the measuring tool to simulate the assembly of the base body, wherein the sinking amount measured by the keyed threaded sleeve in the measuring tool is grouped according to the sinking amount conditions.

[0013] Furthermore, the measuring instrument includes an upper pressure block and a bottom block. The upper pressure block is placed on the bottom block, and a semi-circular hole is provided between the upper pressure block and the bottom block. The semi-circular hole is threaded. The two sets of semi-circular holes are combined to form a threaded sleeve hole. Horizontal keyways are provided on the upper pressure block and the bottom block on both sides of the threaded sleeve hole, corresponding to the locking key position of the keyed threaded sleeve. The keyed threaded sleeve is placed in the threaded sleeve hole, and the locking key position of the keyed threaded sleeve is aligned with the horizontal keyway. The keyed side surfaces of the upper pressure block and the bottom block are flush.

[0014] Furthermore, the center of the horizontal keyway of the measuring instrument is located at the starting point of the internal thread rotation of the threaded hole.

[0015] Furthermore, the specific process of simulating the assembly of the keyed threaded insert within the measuring fixture is as follows:

[0016] Remove the upper pressure block from the bottom block and place the keyed threaded insert into the semi-circular hole of the bottom block;

[0017] The upper pressure block is placed on the bottom block, and the semi-circular hole of the upper pressure block covers the keyed threaded sleeve.

[0018] Align the locking key of the keyed threaded sleeve with the horizontal keyway;

[0019] The amount of subsidence of the exposed end face of the keyed threaded sleeve on the side end face of the upper pressure block and the bottom block with keyway is measured to complete the base assembly simulation work.

[0020] Furthermore, the actual distribution range of the subsidence measured when the keyed threaded insert is installed on the measuring tool is 0 ≤ subsidence < 0.5 times the pitch, where the pitch is the external thread pitch of the keyed threaded insert.

[0021] Preferably, the sinking condition is the distance between the end face of the keyed threaded sleeve and the end face of the base, and the sinking range is 0.1 to 0.4 mm.

[0022] Preferably, when several keyed threaded inserts are grouped according to the sinking condition, the misalignment angle between the starting point of the internal thread helix on the mounting base and the center of the keyway is determined according to different groups.

[0023] Preferably, the keyway on the inner thread wall of the base is machined according to the starting point of the thread turn and the misalignment of the keyway center of the keyed threaded sleeve corresponding to different groups, and the corresponding keyed threaded sleeve group number is uniformly marked.

[0024] Preferably, when the keyed threaded insert is screwed into the base body, the keyway position group controlled by the base body is selected, and keyed threaded inserts of different groups are directly assembled.

[0025] Compared with the prior art, the present invention has the following beneficial technical effects:

[0026] This invention provides an assembly method for controlling the sinking amount of keyed threaded inserts within a substrate. Several keyed threaded inserts are grouped according to the sinking amount conditions to simulate the assembly of the substrate. This effectively distinguishes the keyed threaded inserts before assembly, preventing unsuitable inserts from affecting the assembly result. Simultaneously, based on the sinking amount of each group of keyed threaded inserts, a keyway is created at the end of the substrate corresponding to the keying position of the keyed threaded insert. This allows the substrate to be designed for machining processes based on the grouped keyed threaded inserts, improving assembly efficiency. This invention simplifies the overall process flow, allowing direct assembly on the substrate without marking keyway positions within the substrate during trial assembly and then grooving the substrate. It also improves the machining quality of keyways on difficult-to-machine substrate parts, addresses the problem of frequent damage to manual grooving tools, and enables efficient assembly of large batches of keyed threaded inserts.

[0027] Furthermore, the keyed threaded sleeve is placed in the measuring fixture to simulate the assembly of the base body. The amount of sinking measured by the keyed threaded sleeve in the measuring fixture is grouped according to the sinking condition, which can ensure that the key position is aligned with the keyway while ensuring the sinking requirement.

[0028] Furthermore, the measuring tool includes an upper pressure block and a bottom block, with the upper pressure block placed on the bottom block. Semicircular holes are provided between the upper pressure block and the bottom block, and the two sets of semicircular holes merge to form a threaded sleeve hole. Horizontal keyways are provided on the upper pressure block and the bottom block on both sides of the threaded sleeve hole, corresponding to the locking key position of the keyed threaded sleeve. The keyed threaded sleeve is placed in the threaded sleeve hole, with the locking key position aligned with the horizontal keyway. This allows for simulated assembly of the keyed threaded sleeve on the measuring tool before final assembly, simplifying the trial assembly process on the substrate. This significantly meets the design requirements for the sinking amount of the keyed threaded sleeve. Simultaneously, the substrate can be designed for machining processes through simulation of the keyed threaded sleeve on the measuring tool, achieving the goal of pre-machining the keyway during machining, eliminating the pre-assembly stage and the need for manual keyway machining on the assembly site. This process solution solves the problems of frequent damage to keyway cutting tools on the assembly site, as well as the complex installation process and long overall process cycle of the keyed threaded sleeve.

[0029] Furthermore, this invention provides an assembly control method that simultaneously ensures the alignment of the locking key on the keyed threaded sleeve with the keyway in the base body, and that the amount of settlement between the keyed threaded sleeve and the end face of the base body after installation meets the requirements. This solves the problems of complex processes and difficult keyway machining in existing keyed threaded sleeve assembly processes. Attached Figure Description

[0030] Figure 1 This is a flowchart of the assembly method for controlling the sinking amount of the keyed threaded sleeve in the matrix in this invention;

[0031] Figure 2 This is a schematic diagram of the keyed threaded sleeve inserted into the base body in this invention;

[0032] Figure 3 This is a schematic diagram of the measuring instrument structure in this invention;

[0033] Figure 4 This is a flowchart illustrating the simulation process of keyed threaded sleeves assembling the base material within the measuring fixture in this invention.

[0034] In the figure: 1-Keyed threaded sleeve; 2-Key; 3-Base; 4-Keyway; 5-Measurement tool; 6-Upper pressure block; 7-Sleeve hole; 8-Horizontal keyway; 9-Bottom block. Detailed Implementation

[0035] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0036] The present invention will now be described in further detail with reference to the accompanying drawings:

[0037] The purpose of this invention is to provide an assembly method for controlling the sinking amount of a keyed threaded sleeve in a substrate, so as to solve the technical problems of complex process and difficult keyway processing in the existing assembly process of keyed threaded sleeves.

[0038] Example 1

[0039] See Figure 1 In one embodiment of the present invention, an assembly method for controlling the subsidence of a keyed threaded sleeve within a substrate is provided, comprising:

[0040] Step 1: Simulate the assembly of the keyed threaded sleeve 1 and the base 3. With the locking key 2 on the keyed threaded sleeve 1 aligned with the preset keyway, measure the sinking amount of several keyed threaded sleeves 1. Group the keyed threaded sleeves 1 according to the sinking amount.

[0041] Specifically, the keyed threaded sleeve 1 is placed in the measuring tool 5 to simulate the assembly of the base 3. The amount of sinking of the keyed threaded sleeve 1 measured in the measuring tool 5 is grouped according to the sinking conditions.

[0042] Among them, according to Figure 3 As shown, the measuring tool 5 includes an upper pressure block 6 and a bottom block 9. The upper pressure block 6 is placed on the bottom block 9. A semi-circular hole is provided between the upper pressure block 6 and the bottom block 9. The semi-circular hole is threaded. The two sets of semi-circular holes are combined to form a threaded sleeve hole 7. Horizontal keyways 8 are provided on the upper pressure block 6 and the bottom block 9 on both sides of the threaded sleeve hole 7, corresponding to the position of the locking key 2 of the keyed threaded sleeve 1. The keyed threaded sleeve 1 is placed in the threaded sleeve hole 7, and the position of the locking key 2 of the keyed threaded sleeve 1 is aligned with the horizontal keyway 8. The keyed side surfaces of the upper pressure block 6 and the bottom block 9 are flush.

[0043] Among them, the center of the horizontal keyway 8 of the measuring tool 5 is located at the starting point of the internal thread helix of the thread sleeve hole 7.

[0044] Among them, according to Figure 4 As shown, the specific process of simulating the assembly of the keyed threaded sleeve 1 with the base 3 within the measuring fixture 5 is as follows:

[0045] S1, remove the upper pressure block 6 from the bottom block 9, and place the keyed threaded sleeve 1 into the semi-circular hole of the bottom block 9;

[0046] S2, place the upper pressure block 6 on the bottom block 9, and cover the semi-circular hole of the upper pressure block 6 on the keyed threaded sleeve 1;

[0047] S3, Align the locking key 2 of the keyed threaded sleeve 1 with the horizontal keyway 8;

[0048] S4. Measure the amount of sinking of the exposed end face of the keyed threaded sleeve 1 on the side end face of the upper pressure block 6 and the bottom block 9 with keyways, and complete the assembly simulation of the base 3.

[0049] The actual distribution range of the subsidence measured when the keyed threaded sleeve 1 is installed on the measuring tool 5 is 0 ≤ subsidence < 0.5 times the pitch, where the pitch is the external thread pitch of the keyed threaded sleeve 1.

[0050] The horizontal keyway 8 is distributed at 180° on both sides of the threaded sleeve hole 7. The internal thread and keyway of the measuring tool 5 are divided into upper and lower parts, and the internal thread and keyway are symmetrically divided along the longitudinal direction, which facilitates the installation and removal of the threaded sleeve 1 with key during the measurement process. The starting point of the internal thread helix and the center position of the keyway overlap and are located on the 180° parting surface.

[0051] Place the keyed threaded sleeve 1 into the measuring tool 5, ensuring that the exposed end face of the keyed threaded sleeve 1 does not protrude from the end face of the measuring tool 5. With the locking key 2 aligned with the horizontal keyway 8 of the measuring tool 5, measure the distance between the end face of the keyed threaded sleeve 1 and the end face of the measuring tool 5, i.e., the equivalent sinking amount.

[0052] The sinking condition is the distance between the end face of the keyed threaded sleeve 4 and the end face of the base 3, which ranges from 0.1 to 0.4 mm.

[0053] Step 2: Compare the sinking range of each set of keyed threaded sleeves 1 with the sinking condition to obtain the difference. Based on the difference, determine the angle between the actual keyway position and the preset keyway position required for each set of keyed threaded sleeves 1 to meet the sinking condition.

[0054] Specifically, when several keyed threaded inserts 1 are grouped according to the sinking condition, the misalignment angle between the starting point of the internal thread helix on the corresponding mounting base and the center of the keyway is determined according to different groups.

[0055] Specifically, the keyway on the inner thread wall of the base 3 is machined according to the starting point of the thread helix and the misalignment of the keyway center of the keyed threaded sleeve 1 of different groups, and the corresponding keyed threaded sleeve group number is uniformly marked.

[0056] In this embodiment, after installation, the upper surface of the keyed threaded sleeve 1 is lower than the surface of the base 3, that is, the amount of sinking is controlled as required.

[0057] Ensure that the locking key 2 on the keyed threaded sleeve 1 is aligned with the keyway 4 on the inner wall of the threaded hole on the base 3; after alignment, press the locking key 2 on the keyed threaded sleeve 1 down into the keyway 4 on the threaded hole wall of the base 3 until it is below the surface of the base 3.

[0058] In this embodiment, the machining of the internal threads of the base 3 ensures that the starting point angular position of the thread spiral of each hole is consistent. The internal threads of the base 3 are machined by CNC milling, and the program controls the angular position of the starting point of each internal thread spiral of the base to be consistent.

[0059] Step 3: Based on the angle between the actual keyway position and the preset keyway position, establish the positional relationship of the keyway 4 on the threaded hole of the base 3 corresponding to the installation requirements of each set of keyed threaded inserts; and machine the keyway 4 on the base 3 according to this positional relationship; such as Figure 2 As shown, the assembly work of controlling the sinking amount of the keyed threaded sleeve 1 in the base 3 is completed.

[0060] In this embodiment, the sinking amount is the distance between the exposed upper surface of the keyed threaded sleeve and the end surface of the mounting base after installation, as required by the design drawings. It is usually a range value such as 0.1 to 0.4 mm.

[0061] The equivalent subsidence is the subsidence measured when the keyed threaded insert is installed on a special group measuring tool. The actual distribution range is: 0 ≤ equivalent subsidence < 0.5 times the pitch (referring to the external thread pitch of the keyed threaded insert).

[0062] Step 4: Install the keyed threaded sleeve of the corresponding group according to the keyway position of the base body. Tighten the keyed threaded sleeve 1 into the threaded hole of the base body 3 until the end face of the exposed end of the keyed threaded sleeve 1 is lower than the surface of the base body 3 by the required amount of recess, and stop tightening when the locking key 2 on the keyed threaded sleeve 1 is aligned with the keyway 4 of the threaded hole of the base body 3. Press the locking key 2 down along the keyway 4 on the base body 3 until its end is lower than the surface of the base body 3 and flush with the exposed end face of the keyed threaded sleeve 1, thus completing the assembly of the keyed threaded sleeve 1.

[0063] Example 2

[0064] This embodiment provides a keyed threaded insert 1 with two locking keys. Its external thread specification is .375-16UNC, and the calculated pitch is 1.5875mm (taken as 1.59mm). The corresponding internal thread specification of the mounting base is the same. According to the assembly method drawing for controlling the settlement of the keyed threaded insert within the base, the settlement requirement for this keyed threaded insert is 0.1–0.4mm. All threads are right-hand threads.

[0065] The pitch of the keyed threaded insert 1 is taken as 1.59 mm. The equivalent subsidence is measured with measuring tool 5. The data are distributed within 0.5 times the pitch, i.e., 0 to 0.8 mm.

[0066] In this embodiment, the measuring tool 5 includes an upper pressure block 6 and a bottom block 9. The upper pressure block 6 is placed on the bottom block 9. A semi-circular hole is provided between the upper pressure block 6 and the bottom block 9. The two sets of semi-circular holes are combined to form a threaded sleeve hole 7. Horizontal keyways 8 are provided on the upper pressure block 6 and the bottom block 9 on both sides of the threaded sleeve hole 7, corresponding to the position of the locking key 2 of the keyed threaded sleeve 1. The keyed threaded sleeve 1 is placed in the threaded sleeve hole 7, and the position of the locking key 2 of the keyed threaded sleeve 1 is aligned with the horizontal keyway 8.

[0067] The specific process of simulating the assembly of the keyed threaded sleeve 1 with the base 3 within the measuring fixture 5 is as follows:

[0068] Remove the upper pressure block 6 from the bottom block 9 and place the keyed threaded sleeve 1 into the semi-circular hole of the bottom block 9; place the upper pressure block 6 on the bottom block 9, and cover the semi-circular hole of the upper pressure block 6 on the keyed threaded sleeve 1; align the locking key 2 of the keyed threaded sleeve 1 with the horizontal keyway 8; measure the amount of sinking of the end face of the keyed threaded sleeve 1 on the end faces of the upper pressure block 6 and the bottom block 9 to complete the assembly simulation of the base 3.

[0069] The keyed threaded sleeves are grouped according to the equivalent sinking amount and the sinking amount requirement range, and the starting point of the thread helix on the mounting base and the angular position requirement of the keyway center are determined, as shown in Tables 1 and 2.

[0070] Table 1. Grouping and angular position requirements of keyed threaded inserts (unit: mm)

[0071]

[0072]

[0073] Using a test plate made of the same material as the base 3, mill the internal thread with the starting point of the spiral angular direction consistent. Then, using the keyway center of the base determined by the keyway sleeve of different groups in Table 1 and the starting point of the internal thread spiral angular direction misalignment, mill the keyways at different distribution positions and mark the group number.

[0074] Install the keyed threaded sleeves that are grouped into groups on the processed test plate. After verification, when the keyway position is aligned after installation, the sinking amount can meet the requirements of 0.1 to 0.4 mm.

[0075] In summary, this invention provides an assembly method for controlling the sinking amount of keyed threaded inserts within a substrate. Several keyed threaded inserts are grouped according to the sinking amount conditions to simulate the assembly of the substrate. This effectively distinguishes the keyed threaded inserts before assembly, preventing unsuitable inserts from affecting the assembly result. Simultaneously, based on the sinking amount of each group of keyed threaded inserts, a keyway is created at the end of the substrate corresponding to the keying position of the keyed threaded insert. This allows the substrate to be designed for machining processes based on the grouped keyed threaded inserts, improving assembly efficiency. This invention simplifies the overall process flow, allowing direct assembly on the substrate without marking keyway positions within the substrate during trial assembly and then grooving the substrate. It also improves the machining quality of keyways on difficult-to-machine substrate parts, addresses the problem of frequent damage to manual grooving tools, and enables efficient assembly of large batches of keyed threaded inserts.

[0076] This invention eliminates the current process of pre-assembling the keyed threaded sleeve, marking the relative positions of the key, disassembling and removing the keyed threaded sleeve, and cutting the corresponding keyway on the threaded substrate according to the marked positions on the assembly site. It solves the problem of low assembly efficiency and the difficulty of manually cutting keyways on the difficult-to-process material substrate on the assembly site.

[0077] This invention provides an assembly control method that simultaneously ensures the alignment of the locking key on the keyed threaded insert with the keyway in the base body, and that the amount of settlement between the keyed threaded insert and the end face of the base body after installation meets the requirements. It solves the problems of complex processes and difficult keyway machining in existing keyed threaded insert assembly processes.

[0078] The measuring tool used in this invention includes an upper pressure block and a bottom block. The upper pressure block is placed on the bottom block, and a semi-circular hole is provided between the upper pressure block and the bottom block. The two sets of semi-circular holes are combined to form a threaded sleeve hole. Horizontal keyways are provided on the upper pressure block and the bottom block on both sides of the threaded sleeve hole, corresponding to the locking key position of the keyed threaded sleeve. The keyed threaded sleeve is placed in the threaded sleeve hole, and the locking key position of the keyed threaded sleeve is aligned with the horizontal keyway. This allows the keyed threaded sleeve to be simulated in the measuring tool before assembly, simplifying the trial assembly process on the substrate. This greatly satisfies the design requirements for the sinking amount of the keyed threaded sleeve. Simultaneously, the substrate can be designed for machining through simulation of the keyed threaded sleeve on the measuring tool, achieving the goal of pre-machining the keyway during machining, eliminating the pre-assembly stage and the need for manual keyway machining on the assembly site. This process solves the problems of frequent damage to keyway cutting tools on the assembly site, as well as the complex installation process and long overall process cycle of the keyed threaded sleeve.

[0079] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the specific implementation of the present invention. Any modifications or equivalent substitutions that do not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. An assembly method for controlling the subsidence of a keyed threaded sleeve within a substrate, characterized in that, The assembly form of the keyed threaded sleeve (1) and the base (3) is simulated. Under the condition that the locking key (2) on the keyed threaded sleeve (1) is aligned with the preset keyway, the sinking amount of several keyed threaded sleeves (1) is measured, and the several keyed threaded sleeves (1) are grouped according to the sinking amount. The difference between the sinking range and the sinking condition of each set of keyed threaded sleeves (1) is obtained. Based on the difference, the angle between the actual keyway position and the preset keyway position required for each set of keyed threaded sleeves (1) to meet the sinking condition is determined. Based on the angle between the actual keyway position and the preset keyway position, establish the positional relationship of the keyway (4) of the threaded hole on the base (3) corresponding to the installation of each set of keyed threaded sleeves that meets the requirements, and process the keyway (4) on the base (3) according to this positional relationship; Install the keyed threaded sleeve of the corresponding group according to the keyway position of the base body. Tighten the keyed threaded sleeve (1) into the threaded hole of the base body (3) until the end face of the exposed end of the keyed threaded sleeve (1) is lower than the surface of the base body (3) and the sinking meets the requirements. Stop tightening when the locking key (2) on the keyed threaded sleeve (1) is aligned with the keyway (4) of the threaded hole of the base body (3). Press the locking key (2) down along the keyway (4) on the base body (3) until its end is lower than the surface of the base body (3) and flush with the exposed end face of the keyed threaded sleeve (1). The assembly of the keyed threaded sleeve (1) is completed.

2. The assembly method for controlling the sinking of a keyed threaded sleeve in a base body according to claim 1, characterized in that, The keyed threaded sleeve (1) is placed in the measuring tool (5) to simulate the assembly of the base (3). The amount of sinking measured by the keyed threaded sleeve (1) in the measuring tool (5) is grouped according to the sinking condition.

3. The assembly method for controlling the sinking of a keyed threaded sleeve in a base body according to claim 2, characterized in that, The measuring tool (5) includes an upper pressure block (6) and a bottom block (9). The upper pressure block (6) is placed on the bottom block (9). There are semi-circular holes between the upper pressure block (6) and the bottom block (9). The semi-circular holes are threaded. The two sets of semi-circular holes are combined to form a threaded sleeve hole (7). Horizontal keyways (8) are provided on the upper pressure block (6) and the bottom block (9) respectively, corresponding to the position of the locking key (2) of the keyed threaded sleeve (1) on both sides of the threaded sleeve hole (7). The keyed threaded sleeve (1) is placed in the threaded sleeve hole (7). The position of the locking key (2) of the keyed threaded sleeve (1) is aligned with the horizontal keyway (8). The keyed side surfaces of the upper pressure block (6) and the bottom block (9) are flush.

4. The assembly method for controlling the sinking amount of a keyed threaded sleeve in a base body according to claim 3, wherein the center of the horizontal keyway (8) of the measuring tool (5) is located at the starting point of the internal thread helix of the sleeve hole (7).

5. The assembly method for controlling the settlement of a keyed threaded sleeve in a base body according to claim 3, characterized in that, The specific process of simulating the assembly of the keyed threaded sleeve (1) with the base (3) inside the measuring fixture (5) is as follows: Remove the upper pressure block (6) from the bottom block (9) and place the keyed threaded sleeve (1) into the semi-circular hole of the bottom block (9); The upper pressure block (6) is placed on the bottom block (9), and the semi-circular hole of the upper pressure block (6) is placed on the keyed threaded sleeve (1); Align the locking key (2) of the keyed threaded sleeve (1) with the horizontal keyway (8); The amount of sinking of the exposed end face of the keyed threaded sleeve (1) on the side end face of the upper pressure block (6) and the bottom block (9) with keyway is measured to complete the assembly simulation of the base (3).

6. The assembly method for controlling the settlement of a keyed threaded sleeve in a base body according to claim 5, characterized in that, The actual distribution range of the subsidence measured when the keyed threaded sleeve (1) is installed on the measuring tool (5) is 0 ≤ subsidence < 0.5 times the pitch, where the pitch is the external thread pitch of the keyed threaded sleeve (1).

7. The assembly method for controlling the settlement of a keyed threaded sleeve in a base body according to claim 1, characterized in that, The sinking condition is the distance between the end face of the keyed threaded sleeve (1) and the end face of the base (3), and the sinking range is 0.1 to 0.4 mm.

8. The assembly method for controlling the settlement of a keyed threaded sleeve in a base body according to claim 1, characterized in that, When several keyed threaded inserts (1) are grouped according to the sinking condition, the misalignment angle between the starting point of the internal thread helix on the mounting base corresponding to the installation and the center of the keyway is determined according to the different groups.

9. The assembly method for controlling the settlement of a keyed threaded sleeve in a base body according to claim 1, characterized in that, The keyway of the inner thread wall of the base (3) is machined according to the starting point of the thread helix and the misalignment of the keyway center of the keyed threaded sleeve (1) of different groups, and the corresponding keyed threaded sleeve group number is uniformly marked.

10. The assembly method for controlling the sinking of a keyed threaded sleeve in a base body according to claim 1, characterized in that, When the keyed threaded sleeve (1) is screwed into the base (3), the keyway (4) controlled by the base (3) is in different position groups. The keyed threaded sleeves of different groups are directly assembled.

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