A method for assembling pipe joints of a hydraulic system for aircraft actuators

Abstract

A method for assembling pipe joints in an aircraft actuator hydraulic system assembly block is disclosed to achieve precise assembly between the bent pipe joint and the assembly block base. First, a measurement reference conversion component is used to derive the vertical distance from the intersection of the two central axes of the first and second bent joints to the upper reference plane of the assembly block base. Then, based on the derived values, a measurable assembly dimension B is determined. This measurable assembly dimension B is then used as the reference dimension, and the assembly of the upper bent joint of the assembly block is completed using an aircraft actuator hydraulic system assembly block assembly fixture. This method for assembling pipe joints in an aircraft actuator hydraulic system assembly block meets the assembly dimension requirements for upper bent pipe joints during aircraft maintenance, thus ensuring aircraft maintenance quality and safe flight.

Description

Technical Field

[0001] This invention relates to a method for assembling hydraulic system pipe joints, and more particularly to a method for assembling bent pipe joints on the hydraulic system assembly block of an aircraft elevator aileron actuator. Background Technology

[0002] As attached Figure 1 To be continued Figure 3 As shown, a modular component of an aircraft elevator aileron actuator hydraulic system includes a modular component base 1 and a set of pipe fittings mounted on the modular component base 1. The pipe fittings consist of four parts: a first elbow joint 2, a second elbow joint 3, a first straight joint 4, and a second straight joint 5. This modular component serves as a connecting and transitioning element in the aircraft elevator aileron actuator hydraulic system. The pipe fittings are connected to the aircraft elevator aileron actuator hydraulic system pipelines and the elevator aileron servo actuator hoses, respectively. Hydraulic oil enters the modular component through a high-pressure oil supply conduit, then enters the high-pressure chamber of the aileron actuator through the hoses, converting hydraulic energy into mechanical energy. The hydraulic energy then flows from the low-pressure chamber of the aileron actuator back to the fuselage through the hoses into the low-pressure circuit of the modular component.

[0003] During the assembly of the aforementioned modular components, if the dimensional accuracy of the pipe fittings cannot be guaranteed, a gap will remain between the pipe fittings and the modular base 1. When the modular unit is in operation, under the impact of hydraulic pulsations, the sealing ring installed between the pipe fitting positioning cap and the modular base 1 will be squeezed out or even break, resulting in seal failure and hydraulic oil leakage, especially in the case of... Figure 2 The assembly dimensions L1 and L2 of the bent pipe joint shown are difficult to measure accurately. If traditional assembly processes are used, the inability to guarantee the accuracy of these assembly dimensions will lead to hydraulic oil leakage. When the hydraulic oil leakage reaches a certain value, the aircraft hydraulic system alarm light will flash, the oil pressure will drop, and the hydraulic system will not be able to supply pressure normally. This will prevent the aircraft's landing gear, rudder, elevators, and other operating systems from providing normal power, resulting in system control failure and seriously endangering flight safety. Summary of the Invention

[0004] This invention provides a method for assembling pipe joints of a hydraulic system assembly block for aircraft actuators, in order to meet the assembly size requirements of the bent pipe joints on the assembly block during aircraft maintenance, thereby ensuring the quality of aircraft maintenance and safe flight.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A method for assembling pipe joints of aircraft actuator hydraulic system assembly blocks utilizes assembly fixtures to achieve precise assembly between the bent pipe joint and the assembly block base. The specific operation steps are as follows:

[0007] a. Insert the reference conversion positioning block into the radial through hole of the reference conversion measuring rod, and then assemble the reference conversion measuring rod with the adjusting rod so that the inner end of the adjusting rod is pressed against the reference conversion positioning block. Measure the distance between the top of the reference conversion measuring rod and the inner end face of the adjusting rod. If the measured distance value is L1, then fix the adjusting rod with the locking screw. If the measured distance value deviates from L1, replace the reference conversion positioning block with a different specification until the measured distance value is L1, and then fix the adjusting rod with the reference conversion measuring rod with the locking screw.

[0008] b. Place the reference conversion positioning sleeve on the outside of the reference conversion measuring rod, and screw the reference conversion positioning sleeve so that the end face of the reference conversion positioning sleeve abuts against the reference conversion positioning block. At this time, the distance between the tip of the conical surface of the reference conversion measuring rod and the end face of the reference conversion positioning sleeve is L1. Lock the reference conversion positioning sleeve and the reference conversion measuring rod with the locking screw.

[0009] c. Assemble the first bent joint with the bent joint port fixing component and the first bent joint measuring frame of the aircraft actuator hydraulic system assembly tooling. After ensuring that the positioning body of the bent joint port fixing component in the aircraft actuator hydraulic system assembly tooling meets the assembly requirements, lock and fix the positioning body through the inner fastening sleeve of the bent joint port fixing component. Then, pre-assemble the first bent joint measuring frame fixing seat and the first bent joint measuring frame of the aircraft actuator hydraulic system assembly tooling.

[0010] d. Remove the reference conversion positioning block in the measurement reference conversion assembly, assemble the measurement reference conversion assembly with the first bent joint, and when you feel the conical surface of the reference conversion measuring rod contacting the cut surface at one end of the positioning body, lock and fix the reference conversion positioning sleeve to the first bent joint with the locking screw.

[0011] e. Tighten the pipe fitting positioning cap that mates with the first elbow joint so that it contacts the upper end face of the reference conversion positioning sleeve. Use a measuring ruler to insert into the first axial through hole of the first elbow joint measuring frame fixing seat to measure the distance B from the upper end face of the first elbow joint measuring frame fixing seat to the upper end face of the pipe fitting positioning cap. Record the specific data of dimension B as the new reference data. Remove the measurement reference conversion component.

[0012] f. Assemble the first elbow joint with the base of the assembly block, and adjust the assembly height of the first elbow joint so that the distance from the upper end face of the measuring frame fixing seat of the first elbow joint to the upper end face of the pipe joint positioning cap is B.

[0013] g. Following the above steps, complete the assembly of the second bend joint and the base of the assembly block.

[0014] In the above-mentioned assembly method of the hydraulic system assembly block pipe joint of the aircraft actuator, in step a, the L1 dimension can be obtained by inserting the depth measuring rod of the vernier caliper into the eccentric square hole of the reference conversion measuring rod, or by measuring the distance between the tip of the conical surface of the reference conversion measuring rod and the reference conversion positioning block.

[0015] In the above-mentioned assembly method for the hydraulic system assembly block pipe joint of the aircraft actuator, in step c, the positioning mark on the positioning body and the alignment mark on the first elbow joint are matched to ensure that the orientation of the cut surface of the positioning body meets the assembly requirements after assembly.

[0016] In the above-mentioned assembly method of the hydraulic system assembly block pipe joint of the aircraft actuator, in step d, the reference conversion positioning sleeve is screwed on, and the internal thread of the reference conversion positioning sleeve is engaged with the external thread of the first elbow joint. The top of the conical surface of the reference conversion measuring rod moves towards the positioning body of the elbow joint port fixing assembly. When the conical surface of the reference conversion measuring rod is felt to contact the cut surface of one end of the positioning body, the screwing action of the reference conversion positioning sleeve is stopped.

[0017] In the above-mentioned assembly method of the hydraulic system assembly block pipe joint of the aircraft actuator, in step e, the depth measuring rod of the vernier caliper is inserted into the three sets of first axial through holes of the first elbow joint measuring frame fixing seat to measure the distance B from the upper end face of the first elbow joint measuring frame fixing seat to the upper end face of the pipe joint positioning cap. When the three measurement data do not meet the set accuracy requirements, the pipe joint positioning cap that mates with the first elbow joint can be loosened first, the depth of the first elbow joint screwed into the assembly block base can be adjusted, and then the pipe joint positioning cap that mates with the first elbow joint can be tightened. The distance B from the upper end face of the first elbow joint measuring frame fixing seat to the upper end face of the pipe joint positioning cap can be measured again. The above operation process is repeated until the measurement data meets the set accuracy requirements.

[0018] This invention provides a method for assembling pipe joints in an aircraft actuator hydraulic system assembly block. It employs a measurement reference conversion component to derive the vertical distances L1 and L2, respectively, from the intersection of the two central axes of the first and second bend joints to the upper reference surface of the assembly block base. Based on these derived values, the measurable assembly dimension B is determined. Then, using an aircraft actuator hydraulic system assembly block assembly fixture, the upper bend joint of the assembly block is assembled. Therefore, this invention satisfies the assembly dimension requirements for the pipe joints in the assembly block during aircraft maintenance, achieving the goal of ensuring aircraft maintenance quality and safe flight. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the hydraulic system assembly block for the aircraft's elevator aileron actuator;

[0020] Figure 2 yes Figure 1 K-direction view;

[0021] Figure 3 This is a schematic diagram of the assembly tooling structure of the aircraft actuator hydraulic system combination block used in this invention.

[0022] Figure 4 yes Figure 3 K-direction view;

[0023] Figure 5 This is a schematic diagram of the measuring frame structure for the first bend joint;

[0024] Figure 6 This is a schematic diagram of the structure of the measuring frame fixing base for the first bend joint;

[0025] Figure 7 This is a schematic diagram of the measuring frame structure for the second bend joint;

[0026] Figure 8 This is a schematic diagram of the fixing base structure of the second bend joint measuring frame;

[0027] Figure 9 This is a schematic diagram of the assembly structure of the first bend joint, the first bend joint measuring frame, and the bend joint port fixing assembly.

[0028] Figure 10 yes Figure 9 Exploded structure diagram;

[0029] Figure 11 This is a schematic diagram of the assembly structure of the measurement reference conversion component;

[0030] Figure 12 yes Figure 11 Schematic diagram of the cross-sectional structure of the middle AA section;

[0031] Figure 13 This is a schematic diagram of the cross-sectional structure of the measuring rod for measuring reference conversion;

[0032] Figure 14 yes Figure 13 Schematic diagram of the cross-sectional structure of the middle BB section;

[0033] Figure 15 This is a schematic diagram illustrating the conversion principle of the internal reference dimensions of a bend joint (taking the first bend joint as an example).

[0034] Figure 16 This is a schematic diagram of the assembly structure of the elbow joint (taking the first elbow joint as an example) and the combination block base.

[0035] Explanation of each label in the diagram:

[0036] 1 is the base of the assembly block; 2 is the first elbow joint; 3 is the second elbow joint; 4 is the first straight joint; 5 is the second straight joint;

[0037] 6 is the measuring frame for the first bend joint; 6-1 is the through hole for the first bend joint; 6-2 is the positioning block.

[0038] 7 is the first elbow joint measuring frame fixing seat, 7-1 is the first elbow joint clearance groove, 7-2 is the first axial through hole, 7-3 is the first positioning slot, and 7-4 is the first fixing screw through hole;

[0039] 8 is the measuring frame for the first bend joint, 8-1 is the through hole for the second bend joint, and 8-2 is the positioning plane;

[0040] 9 is the second elbow joint measuring frame fixing seat, 9-1 is the second elbow joint clearance groove, 9-2 is the second axial through hole, 9-3 is the second positioning slot, 9-4 is the second fixing screw through hole, and 9-5 is the elastic hole groove.

[0041] 10 is the elbow joint port fixing component, 10-1 is the positioning sleeve, 10-2 is the outer fixing sleeve, 10-3 is the positioning body, 10-3-1 is the cut surface, 10-3-2 is the alignment mark, and 10-4 is the inner fixing sleeve.

[0042] 11 is the pipe fitting positioning cap;

[0043] 12 is the measurement reference conversion assembly, 12-1 is the reference conversion measuring rod, 12-1-1 is the eccentric square hole, 12-1-2 is the radial through hole, 12-2 is the reference conversion positioning sleeve, 12-3 is the adjusting rod, 12-4 is the reference conversion positioning block, and 12-5 is the locking screw.

[0044] 13 is a sealing gasket. Detailed Implementation

[0045] See Figure 1. Figure 2 , Figure 3 A modular component for a hydraulic system of an aircraft elevon aileron actuator is disclosed. It includes a modular component base 1 and a set of pipe fittings mounted on the base 1. The pipe fittings consist of four parts: a first elbow joint 2, a second elbow joint 3, a first straight joint 4, and a second straight joint 5. During aircraft maintenance, according to the original assembly requirements, the vertical distance from the intersection of the two central axes of the first elbow joint 2 to the upper reference plane of the modular component base should be L1, and the vertical distance from the intersection of the two central axes of the second elbow joint 3 to the upper reference plane of the modular component base should be L2.

[0046] This invention provides a method for assembling pipe joints in an aircraft actuator hydraulic system assembly block, used to achieve precise assembly between the bent pipe joint and the assembly block base. First, a measurement reference conversion component is used to derive the vertical distance from the intersection of the two central axes of the first and second bent joints to the upper reference plane of the assembly block base. Then, based on the derived values, the measurable assembly dimension B is determined. Finally, the assembly of the bent joint on the assembly block is completed using an aircraft actuator hydraulic system assembly block assembly fixture. To facilitate the description of specific embodiments of this invention, the specific structures of the measurement reference conversion component and the aircraft actuator hydraulic system assembly block assembly fixture used in this invention are first described:

[0047] See appendix Figure 11 , Figure 12 , Figure 13 , Figure 14 The measurement reference conversion assembly 12 used in this invention includes a reference conversion measuring rod 12-1, a reference conversion positioning sleeve 12-2, a reference conversion positioning block 12-4, an adjusting rod 12-3, and a locking screw 12-5. The reference conversion measuring rod 12-1 is a hollow sleeve with a conical surface at one end, and its inner hole is a stepped hole. The adjusting rod 12-3 is screwed into one end of its inner hole and locked and fixed by the locking screw 12-5. The other end of the inner hole is provided with an eccentric square hole 12-1-1 for inserting a measuring scale. A radial through hole 12-1-2 is opened on the outer wall of the reference conversion measuring rod 12-1. The reference conversion positioning sleeve 12-2 is threaded onto the outside of the reference conversion measuring rod 12-1 and can be locked and fixed by the locking screw 12-5. The reference conversion positioning block 12-4 passes through the radial through hole 12-1-2 opened on the reference conversion measuring rod 12-1.

[0048] See Figures 4 to 10 The assembly fixture for the aircraft actuator hydraulic system assembly block used in this invention includes a first bend joint measuring frame 6, a first bend joint measuring frame fixing seat 7, a second bend joint measuring frame 8, a second bend joint measuring frame fixing seat 9, a bend joint port fixing assembly 10, and a measurement reference conversion assembly 12. The first bend joint measuring frame 6 is a Z-shaped frame structure, fitted over the first bend joint 2, and assembled with the first bend joint 2 via the first bend joint measuring frame fixing seat 7 and the bend joint port fixing assembly 10. The second bend joint measuring frame 8 is an inverted V-shaped frame structure, fitted over the second bend joint 3, and assembled with the second bend joint 3 via the second bend joint measuring frame fixing seat 9 and the bend joint port fixing assembly 10. The measurement reference conversion assembly 12 is a measurement component used during the assembly process to derive the distance dimensions L1 and L2 between the intersection of the two central axes of the bend joint and the assembly reference surface, thereby realizing the conversion of the measurement reference.

[0049] See Figure 5 , Figure 6The aircraft actuator hydraulic system assembly fixture used in this invention has a first bend joint through hole 6-1 in the middle of its first bend joint measuring frame 6, and a positioning block 6-2 at its bottom that mates with the first bend joint measuring frame fixing seat 7. The first bend joint measuring frame fixing seat 7 of this invention has a first bend joint clearance groove 7-1, and three first axial through holes 7-2 are provided around the first bend joint clearance groove 7-1, through which a measuring ruler passes. The bottom surface of the first bend joint measuring frame fixing seat 7 has a first positioning slot 7-3 that matches the positioning block 6-2 on the first bend joint measuring frame 6. The two side walls of the first bend joint measuring frame fixing seat 7 have first fixing screw through holes 7-4, which are notches that communicate with the bottom surface of the first bend joint measuring frame fixing seat.

[0050] See Figure 7 , Figure 8 The assembly fixture for the aircraft actuator hydraulic system assembly block used in this invention has a second bend joint measuring frame 8 with a second bend joint through hole 8-1 in the middle. The second bend joint measuring frame 8 is assembled with the second bend joint measuring frame fixing seat 9 through the positioning planes 8-2 provided on its side wall and bottom. The second bend joint measuring frame fixing seat 9 of this invention has a second bend joint clearance groove 9-1, and three second axial through holes 9-2 are provided around the second bend joint clearance groove 9-1. The second axial through holes 9-2 are used for the measuring ruler to pass through. The front surface of the second bend joint measuring frame fixing seat 9 has a second positioning slot 9-3 that matches the side wall of the second bend joint measuring frame 8. The two side walls of the second bend joint measuring frame fixing seat 9 have second fixing screw through holes 9-4, which are notches that communicate with the front surface of the second bend joint measuring frame fixing seat.

[0051] See Figure 9 , Figure 10The assembly tooling for the aircraft actuator hydraulic system assembly block used in this invention includes a bend joint port fixing component 10 comprising a positioning sleeve 10-1, an outer fixing sleeve 10-2, a positioning body 10-3, and an inner fixing sleeve 10-4. One end of the positioning sleeve 10-1 is fitted over the outside of the bend joint port, and the other end passes through the corresponding bend joint through hole on the first bend joint measuring frame 6 or the second bend joint measuring frame 8 to assemble with the outer fixing sleeve 10-2. The inner end of the positioning body 10-3 is an arc surface that matches the inner cavity of the bend joint. The lower part of the arc surface is provided with a cutting surface 10-3-1 along the central axis and at a 120-degree angle with the central axis, and an alignment mark 10-3-2 corresponding to the elbow joint is provided on the outer end of the positioning body. A conical surface is provided in the middle of the positioning body 10-3, and an internal hexagonal hole is provided on the outer end face. The inner end of the positioning body 10-3 is fitted into the inner cavity of the elbow joint, and its conical surface is fitted with the conical hole at the port of the elbow joint. The inner fixing sleeve 10-4 is fitted into the positioning sleeve 10-1, and the positioning body 10-3 is pressed and fixed by its inner end face.

[0052] See Figures 9 to 16 When using the assembly method for the hydraulic system assembly block pipe joint of the aircraft actuator described in this invention, the specific operating steps are as follows:

[0053] a. Insert the reference conversion positioning block 12-4 into the radial through hole of the reference conversion measuring rod 12-1, and then assemble the reference conversion measuring rod 12-1 with the adjusting rod 12-3, so that the inner end of the adjusting rod 12-3 is pressed against the reference conversion positioning block 12-4. The distance between the top of the reference conversion measuring rod 12-1 and the inner end face of the adjusting rod 12-3 can be measured by inserting the depth measuring rod of the vernier caliper into the eccentric square hole 12-1-1 of the reference conversion measuring rod 12-1, or by measuring the distance between the top of the reference conversion measuring rod 12-1 and the inner end face of the adjusting rod 12-3. 1. Measure the distance between the tip of the conical surface and the reference conversion positioning block 12-4. Obtain the distance between the top of the reference conversion measuring rod 12-1 and the inner end face of the adjusting rod 12-3. If the measured distance value is L1, fix the adjusting rod 12-3 with the locking screw 12-5. If the measured distance value deviates from L1, replace the reference conversion positioning block 12-4 with a different specification until the measured distance value is L1. Then fix the adjusting rod 12-3 and the reference conversion measuring rod 12-1 with the locking screw 12-5.

[0054] b. Place the reference conversion positioning sleeve 12-2 over the reference conversion measuring rod 12-1, and screw the reference conversion positioning sleeve 12-2 so that the end face of the reference conversion positioning sleeve 12-2 abuts against the reference conversion positioning block 12-4. At this time, the distance between the tip of the conical surface of the reference conversion measuring rod 12-1 and the end face of the reference conversion positioning sleeve 12-2 is L1. Lock and fix the reference conversion positioning sleeve 12-2 and the reference conversion measuring rod 12-1 with the locking screw 12-5.

[0055] c. Assemble the first elbow joint 2 with the elbow joint port fixing assembly 10 and the first elbow joint measuring frame 6 of the aircraft actuator hydraulic system assembly tooling, so that the alignment mark 10-3-2 of the positioning body 10-3 in the elbow joint port fixing assembly 10 is aligned with the alignment mark on the first elbow joint 2. At this time, the cut surface 10-3-1 at one end of the positioning body 10-3 is in the position of the elbow joint 2. Figure 9 In the state shown, the positioning body 10-3 is locked and fixed by the inner sleeve 10-4 of the elbow joint port fixing assembly 10, and then the first elbow joint measuring frame fixing seat 7 of the aircraft actuator hydraulic system assembly tooling is pre-assembled with the first elbow joint measuring frame 6.

[0056] d. Remove the reference conversion positioning block 12-4 from the measurement reference conversion assembly 12, assemble the measurement reference conversion assembly 12 with the first elbow joint 2, and screw on the reference conversion positioning sleeve 12-2. Through the internal thread of the reference conversion positioning sleeve 12-2 and the external thread of the first elbow joint 2, the top of the conical surface of the reference conversion measuring rod 12-1 moves towards the positioning body 10-3 of the elbow joint port fixing assembly 10. When the conical surface of the reference conversion measuring rod 12-1 contacts the cut surface 10-3-1 at one end of the positioning body 10-3, stop the screwing action of the reference conversion positioning sleeve 12-2, and then lock and fix the reference conversion positioning sleeve 12-2 with the first elbow joint 2 with the locking screw 12-5.

[0057] e. Tighten the pipe fitting positioning cap 11 that mates with the first elbow joint 2 so that it contacts the upper end face of the reference conversion positioning sleeve 12-2. Insert the depth measuring rod of the vernier caliper into the three sets of first axial through holes 7-2 of the first elbow joint measuring frame fixing seat 7 to measure the distance B from the upper end face of the first elbow joint measuring frame fixing seat 7 to the upper end face of the pipe fitting positioning cap 11. If the three measurement data do not meet the set accuracy requirements, first loosen the pipe fitting positioning cap 11 that mates with the first elbow joint 2, adjust the depth of the first elbow joint 2 screwed into the combination block base 1, and then tighten the pipe fitting positioning cap 11 that mates with the first elbow joint 2. Measure the distance B from the upper end face of the first elbow joint measuring frame fixing seat 7 to the upper end face of the pipe fitting positioning cap 11. Repeat the above operation process until the measurement data meets the set accuracy requirements. Then record the specific data of dimension B as the new reference data and remove the measurement reference conversion component 12.

[0058] f. Assemble the first elbow joint 2 with the combination block base 1, and adjust the assembly height of the first elbow joint 2 so that the distance from the upper end face of the first elbow joint measuring frame fixing seat 7 to the upper end face of the pipe joint positioning cap 11 is B.

[0059] g. Following the above operating steps, complete the assembly of the second bend joint 3 with the base 1 of the assembly block.

Claims

1. A method for assembling a pipe joint assembly block for an aircraft actuator hydraulic system, characterized in that: It utilizes the hydraulic system of aircraft actuators to assemble pipe joints using a modular assembly fixture, achieving precise assembly between the bent pipe joint and the modular base. The specific operating steps are as follows: a. Insert the reference conversion positioning block (12-4) into the radial through hole of the reference conversion measuring rod (12-1), and then assemble the reference conversion measuring rod (12-1) with the adjusting rod (12-3) so that the inner end of the adjusting rod (12-3) is pressed against the reference conversion positioning block (12-4). Measure the distance between the top of the reference conversion measuring rod (12-1) and the inner end face of the adjusting rod (12-3). If the measured distance value is L1, fix the adjusting rod (12-3) with the locking screw (12-5). If the measured distance value deviates from L1, replace the reference conversion positioning block (12-4) with a different specification until the measured distance value is L1. Then fix the adjusting rod (12-3) with the reference conversion measuring rod (12-1) with the locking screw (12-5). b. Place the reference conversion positioning sleeve (12-2) over the reference conversion measuring rod (12-1), and screw the reference conversion positioning sleeve (12-2) so that the end face of the reference conversion positioning sleeve (12-2) abuts against the reference conversion positioning block (12-4). At this time, the distance between the tip of the conical surface of the reference conversion measuring rod (12-1) and the end face of the reference conversion positioning sleeve (12-2) is L1. Lock the reference conversion positioning sleeve (12-2) and the reference conversion measuring rod (12-1) with the locking screw (12-5). c. Assemble the first bent joint (2) with the bent joint port fixing component (10) and the first bent joint measuring frame (6) of the aircraft actuator hydraulic system assembly tooling. After ensuring that the positioning body (10-3) of the bent joint port fixing component (10) in the aircraft actuator hydraulic system assembly tooling meets the assembly requirements, lock and fix the positioning body (10-3) through the inner fastening sleeve (10-4) of the bent joint port fixing component (10). Then pre-assemble the first bent joint measuring frame fixing seat (7) and the first bent joint measuring frame (6) of the aircraft actuator hydraulic system assembly tooling. d. Remove the reference conversion positioning block (12-4) in the measurement reference conversion assembly (12), assemble the measurement reference conversion assembly (12) with the first elbow joint (2), and when you feel the conical surface of the reference conversion measuring rod (12-1) contacting the cut surface (10-3-1) at one end of the positioning body (10-3), lock and fix the reference conversion positioning sleeve (12-2) with the first elbow joint (2) with the locking screw (12-5); e. Tighten the pipe joint positioning cap (11) that mates with the first elbow joint (2) so that it contacts the upper end face of the reference conversion positioning sleeve (12-2). Insert a measuring ruler into the first axial through hole (7-2) of the first elbow joint measuring frame fixing seat (7) to measure the distance B from the upper end face of the first elbow joint measuring frame fixing seat (7) to the upper end face of the pipe joint positioning cap (11). Record the specific data of dimension B as the new reference data. Remove the measurement reference conversion component (12). f. Assemble the first elbow joint (2) with the combination block base (1), and adjust the assembly height of the first elbow joint (2) so that the distance from the upper end face of the first elbow joint measuring frame fixing seat (7) to the upper end face of the pipe joint positioning cap (11) is B. g. The second bend joint (3) in the hydraulic system assembly block pipe joint of the aircraft actuator has the same assembly structure as the first bend joint (2). The assembly of the second bend joint (3) and the assembly block base (1) is completed according to the operation process from step a to step f.

2. The assembly method for the pipe joint of the aircraft actuator hydraulic system assembly block according to claim 1, characterized in that: In step a, the dimension L1 can be obtained by inserting the depth measuring rod of a vernier caliper into the eccentric square hole (12-1-1) of the reference conversion measuring rod (12-1), or by measuring the distance between the tip of the conical surface of the reference conversion measuring rod (12-1) and the reference conversion positioning block (12-4).

3. The assembly method for the pipe joint of the aircraft actuator hydraulic system assembly block according to claim 1 or 2, characterized in that: In step c, the positioning mark (10-3-2) on the positioning body (10-3) and the alignment mark on the first elbow joint are matched to ensure that the orientation of the cut surface (10-3-1) of the positioning body (10-3) meets the assembly requirements after assembly.

4. The assembly method for the pipe joint of the aircraft actuator hydraulic system assembly block according to claim 3, characterized in that: In step d, the reference conversion positioning sleeve (12-2) is screwed on. The internal thread of the reference conversion positioning sleeve (12-2) is engaged with the external thread of the first elbow joint (2), so that the top of the conical surface of the reference conversion measuring rod (12-1) moves toward the positioning body (10-3) of the elbow joint port fixing assembly (10). When the conical surface of the reference conversion measuring rod (12-1) is felt to contact the cut surface (10-3-1) at one end of the positioning body (10-3), the screwing action of the reference conversion positioning sleeve (12-2) is stopped.

5. The assembly method for the pipe joint of the aircraft actuator hydraulic system assembly block according to claim 1, characterized in that: In step e, the depth measuring rod of the vernier caliper is inserted into the three sets of first axial through holes (7-2) of the first elbow measuring frame fixing seat (7) to measure the distance B from the upper end face of the first elbow measuring frame fixing seat (7) to the upper end face of the pipe joint positioning cap (11). If the three measurement data do not meet the set accuracy requirements, the pipe joint positioning cap (11) that mates with the first elbow (2) can be loosened first, the depth of the first elbow (2) screwed into the combination block base (1) can be adjusted, and then the pipe joint positioning cap (11) that mates with the first elbow (2) can be tightened. The process of measuring the distance B from the upper end face of the first elbow measuring frame fixing seat (7) to the upper end face of the pipe joint positioning cap (11) using the vernier caliper is repeated until the three measurement data all meet the set accuracy requirements.

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