A multi-stage large-size sleeve structure precision assembly and performance detection method

Abstract

The application discloses a kind of multi-stage large-size sleeve structure precision assembly and performance detection method, the method relies on equipment including support platform, lifting mechanism, operating platform, gantry support, laser tracker.Firstly, sleeve is placed in support platform, lifting mechanism is placed under support platform, operating platform is placed on the plane of lifting mechanism and is connected and fixed, and laser tracker is fixed in gantry support;Operating platform moves along the axial assembly parts of sleeve interior with lifting mechanism;Sleeve interior operating area is evenly divided into multiple quadrants assembly fine adjustment, assembly of each quadrant is sequentially carried out and is judged by laser tracker to carry out fine adjustment, until multi-stage sleeve structure is completed precision assembly and detection.The application effectively avoids the deformation of parts caused by the force applied to the sleeve during assembly, which leads to the deviation of the assembly position of the parts after the force is removed, resulting in the reduction of precision, realizes the detection of the assembly position of the parts without personnel removal, and improves the assembly precision and efficiency.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of assembly process, and particularly relates to a precision assembly and detection method for large-size thin-wall sleeve structure. BACKGROUND

[0002] At present, with the development of space technology application, spaceborne payloads have an urgent requirement for large-scale basic bearing structure and mechanism. Limited by the carrying space of rockets, a multi-stage large-size extendable sleeve structure can be used as the main support structure of spaceborne payloads due to its large extension ratio.

[0003] Taking a satellite antenna as an example, the larger the extension size is, the larger the antenna size that can be carried is, and the multi-stage sleeve is more conducive to improving the communication effect than the fixed support structure. The machining and assembly precision of the multi-stage sleeve will directly affect the deployment precision of the product. However, due to the lightweight requirement of the spacecraft structure, the sleeve structure has the characteristics of thin wall, large length-diameter ratio, small implementation space and high assembly precision, and therefore has the difficulties of weak rigidity, difficult support, and difficult guarantee of assembly precision in a narrow space. SUMMARY

[0004] The technical problem solved by the application is to overcome the difficulties of weak rigidity, difficult support and difficult guarantee of assembly precision in a narrow space of large-size sleeve structure, and to provide a precision assembly and performance detection method for single-stage and multi-stage large-size thin-wall sleeve structure.

[0005] The purpose of the application is achieved by the following technical solutions:

[0006] One of the technical solutions of the application is a precision assembly and detection method for single-stage large-size thin-wall sleeve, and the equipment relied on by the method includes a trolley, parallel guide rails, a laser tracker and a rolling support assembly, and the method comprises the following steps:

[0007] Step 1: horizontally placing a single-stage sleeve to be assembled and supporting and fixing the single-stage sleeve by a rolling support assembly, inserting parallel guide rails into the single-stage sleeve in the axial direction and fixing the parallel guide rails at both ends, placing a trolley on the parallel guide rails and placing a laser tracker at the axial front end of the single-stage sleeve;

[0008] Step 2: uniformly dividing the operation area of the internal parts of the single-stage sleeve into multiple quadrants, and axially moving the trolley on the parallel guide rails into the internal part of the single-stage sleeve;

[0009] Step 3: The assembly process of the parts in the operable quadrant inside the single-stage sleeve is carried out, after assembly, the laser tracker is used to scan and determine the assembly of the parts, when the scanning result does not meet the requirement, the parts in the quadrant are fine-tuned until the scanning result of the parts in the quadrant meets the assembly requirement, when the scanning result meets the requirement, a pushing force is applied to the outer wall of the single-stage sleeve to make it rotate around the axis to the next quadrant;

[0010] Step 4: Repeat step 3 until the assembly and fine-tuning process of all quadrants inside the single-stage sleeve is completed.

[0011] Preferably, the rolling support assembly is in contact with the outer wall of the single-stage sleeve through rollers, and the rolling friction makes the single-stage sleeve rotate around the axis; the rollers are arranged on both sides of the bottom of the trolley and are in contact with the parallel guide rail; the laser tracker is located in front of the operation area of the single-stage sleeve and covers the operation area for detection during the assembly process, which is used to determine the straightness of the assembled parts.

[0012] Preferably, the operation area of the parts inside the single-stage sleeve is evenly divided into six quadrants.

[0013] The second technical scheme of the application is to provide a multi-stage large-size thin-wall sleeve structure precision assembly and performance detection method, the multi-stage large-size thin-wall sleeve structure is connected by a plurality of single-stage large-size thin-wall sleeves, and the method relies on a device including a laser tracker, a gantry support, a support platform, a lifting mechanism, and an operation platform, and includes the following steps:

[0014] Step 1: Place the single-stage sleeve in a completely vertical state on the support platform with a circular hole in the middle, place the operation platform on the lifting mechanism on the upper surface and fix it, place the operation platform and the lifting mechanism under the support platform, pass the operation platform through the support platform into the interior of the single-stage sleeve, place the laser tracker above the single-stage sleeve in a vertical state and fix it on the gantry support, and the detection area completely covers the assembly position of the parts inside the single-stage sleeve;

[0015] Step 2: Divide the operation area of the parts inside the single-stage sleeve in a vertical state into a plurality of quadrants, adjust the height of the operation platform through the lifting mechanism so that the operation platform can reach all the part assembly operation areas;

[0016] Step 3: The assembly process of the parts in the operable quadrant inside the single-stage sleeve is carried out, after assembly, the laser tracker is used to scan and determine the assembly of the parts, when the scanning result does not meet the requirement, the parts in the quadrant are fine-tuned until the scanning result of the parts in the quadrant meets the assembly requirement, when the scanning result meets the requirement, the operation platform is moved to the next quadrant part operation area by the lifting mechanism;

[0017] Step 4: Repeat Step 3 until the single-stage sleeve inside the vertical state of all quadrant parts assembly and fine-tuning process is completed;

[0018] Step 5: Put the single-stage sleeve to be assembled inside the assembled single-stage sleeve to form a multi-stage sleeve structure in a contracted state, and perform steps 2 to 4 on the single-stage sleeve to be assembled;

[0019] Step 6: Repeat Step 5 until the multi-stage sleeve structure in the contracted state is completed assembly and fine-tuning process;

[0020] Step 7: Replace the gantry support with a large gantry support, and place the laser tracker on a fixed platform;

[0021] Step 8: Fully expand the multi-stage sleeve structure, and detect the expansion performance of the multi-stage sleeve structure by the laser tracker. According to the judgment, determine the sleeve and specific position of the parts that need to be fine-tuned;

[0022] Step 9: Shrink the multi-stage sleeve structure in the expanded state to the position where the sleeve containing the parts to be fine-tuned is at the lowest position, lift the operating platform to the position of the parts to be fine-tuned by the lifting mechanism, and fine-tune;

[0023] Step 10: Repeat steps 8 to 9 until the judgment of the expansion performance of the multi-stage sleeve structure detected by the laser tracker meets the requirements.

[0024] Preferably, the operating platform has an outer envelope size that is 30 to 50 mm smaller than the inner diameter of the single-stage sleeve to be assembled. A pair of handrails is provided on the top of the operating platform to assist the assembly process. The bottom of the operating platform is connected and fixed to the upper surface of the lifting mechanism by fasteners, and moves up and down with the lifting mechanism. The moving height covers all operating areas of the single-stage large-size thin-walled sleeve to be assembled.

[0025] Preferably, the laser tracker is fixed on the gantry support by hanging when detecting the assembly of the parts of the single-stage large-size thin-walled sleeve. The center of the rotation shaft of the laser tracker coincides with the axis of the single-stage sleeve. When detecting the expansion performance of the multi-stage sleeve structure, the laser tracker is placed on a fixed platform and the distance is adjusted until the detection range can completely cover the multi-stage sleeve structure in the fully expanded state.

[0026] Preferably, the large gantry support has a rigidity that meets the support strength and size requirements of the multi-stage large-size thin-walled sleeve structure in the fully expanded state.

[0027] Preferably, the multi-stage large-size thin-walled sleeve structure has parallel guide rails and pulley devices installed between the single-stage large-size thin-walled sleeves. The sleeves are connected in a nested manner, and each single-stage sleeve has a steel wire rope of the same specification hung therefrom.

[0028] Preferably, when detecting the unfolding performance of the multi-stage sleeve structure, the steel wire rope tension cooperates with the single-stage sleeve gravity to realize the step-by-step full-size unfolding of the multi-stage sleeve structure, each steel wire rope is fixed on the gantry support after unfolding, the laser tracker detects the unfolding performance of the multi-stage sleeve, and the positions of the parts to be finely adjusted of the multi-stage sleeve structure are determined through the detection results, then the single-stage sleeve where the parts to be finely adjusted are located is contracted to the lowermost position by reducing the tension of the steel wire rope, thereby forming a partially contracted state of the multi-stage sleeve structure, the steel wire rope is fixed on the gantry support, and the lifting mechanism lifts the operation platform to the position where the parts to be finely adjusted are located for fine adjustment.

[0029] Compared with the prior art, the present application has the following beneficial effects:

[0030] The single-stage large-size thin-wall sleeve structure precision assembly and detection method provided by the present application avoids the deformation of the parts caused by the applied force during the assembly process, reduces the deviation of the assembly position of the parts after the removal of the force, and reduces the precision, and the parts are finely adjusted according to the real-time detection results of the laser tracker in front of the operation area during the assembly process, so that the operation personnel or the mechanical hand and other operating devices do not need to be withdrawn from the sleeve structure for detection.

[0031] The multi-stage large-size thin-wall sleeve structure precision assembly and performance detection method provided by the present application avoids the application of force to the parts during the operation process, reduces the assembly precision, the laser tracker is arranged above the multi-stage sleeve structure to completely cover the operation range of the parts for precision detection, the steel wire rope hangs on the outer wall of the sleeve to adjust the unfolding and contraction state of the multi-stage sleeve structure, so that the operation personnel or the mechanical hand and other operating devices can always be located on the operation platform to finely adjust the parts of the multi-stage sleeve structure and detect the unfolding performance, and the assembly precision and efficiency are improved. BRIEF DESCRIPTION OF DRAWINGS

[0032] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The accompanying drawings are included to provide a description of the preferred embodiments and are not intended to limit the scope of the application. Moreover, the same reference numerals are used throughout the same figures. In the drawings:

[0033] Figure 1 is a schematic diagram of horizontal assembly and detection of the sleeve provided by the embodiment of the present application;

[0034] Figure 2Figure is a schematic diagram of the connection relationship between the trolley and the parallel guide rail provided by the embodiment of the present application;

[0035] Figure 3 Figure is a schematic diagram of sleeve vertical assembly and detection provided by the embodiment of the present application;

[0036] Figure 4 Figure is a schematic diagram of sleeve vertical assembly and detection provided by the embodiment of the present application;

[0037] Figure 5 Figure is a schematic diagram of multi-stage sleeve detection in full-size unfolded state provided by the embodiment of the present application.

[0038] Mark explanation: 1-trolley, 2-parallel guide rail, 3-single-stage sleeve, 4-laser tracker, 5-rolling support assembly, 6-gantry support, 7-support platform, 8-operation platform, 9-lifting mechanism, 10-large gantry support, 11-multi-stage sleeve structure, 12-fixed platform, 13-steel wire rope. DETAILED DESCRIPTION

[0039] Exemplary embodiments of the present disclosure will be described in greater detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that the present disclosure can be more thoroughly understood and the scope of the present disclosure can be accurately conveyed to those skilled in the art. It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The present application will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

[0040] The present application provides an embodiment of a single-stage large-size thin-walled sleeve structure precision assembly and detection method, as shown in Figure 1 The device relied on by the method includes a trolley 1, a parallel guide rail 2, a laser tracker 4, and a rolling support assembly 5, and specifically includes the following steps:

[0041] Step 1: horizontally place the single-stage sleeve 3, the rolling support assembly 5 supports and fixes the single-stage sleeve 3 and contacts the outer wall thereof through rollers, the single-stage sleeve 3 is rotated circumferentially around the axis through rolling friction, the parallel guide rail 2 is inserted into the single-stage sleeve 3 along the axial direction and is fixed at both ends, and the trolley 1 is arranged on the parallel guide rail 2, as shown in Figure 2 The rollers are arranged at the bottom of both sides of the trolley 1 to contact the parallel guide rail 2, and the laser tracker 4 is arranged at the axial front end of the single-stage sleeve 3 for determining the straightness of the assembled parts;

[0042] Step 2: evenly divide the single-stage sleeve 3 internal component operation area into multiple quadrants (this embodiment is evenly divided into 6 quadrants), and the operator lies flat on the trolley 1 and enters the sleeve interior by axially moving the parallel guide rail 2 by hand;

[0043] Step 3: the operator assembles the single-stage sleeve 3 internal operable quadrant components, after assembly, the laser tracker 4 scans and determines the component assembly, when the scanning result does not meet the requirements, the operator fine-tunes the components in the quadrant, until the scanning result of the components in the quadrant meets the assembly requirements, when the scanning result meets the requirements, the auxiliary operator applies a pushing force to the outer wall of the single-stage sleeve 3 to rotate it circumferentially around the axis to the next quadrant;

[0044] Step 4: repeat step 3 until the single-stage sleeve 3 internal component assembly and fine-tuning process of all quadrants is completed.

[0045] The application also provides an embodiment of a multi-stage large-size thin-walled sleeve structure precision assembly and performance detection method, which connects multiple single-stage large-size thin-walled sleeves into a multi-stage large-size thin-walled sleeve structure and performs precision assembly and performance detection on it, and the equipment relied on by the method includes a laser tracker 4, a gantry support 6, a support platform 7, a lifting mechanism 9, an operation platform 8, a large gantry support 10, a fixed platform 12, and a steel wire rope 13, and specifically includes the following steps:

[0046] Step 1: install the vertical assembly and detection equipment as shown in Figure 3 , place the single-stage sleeve 3 in a fully vertical state on the support platform 7 with a circular hole in the middle, the single-stage sleeve 3 in a vertical state is not affected by gravity, and is restored to a free state along the diameter direction, and the operation platform 8 is placed on the plane of the lifting mechanism 9 and is fixed by fasteners, as shown in Figure 4 , place the operation platform 8 and the lifting mechanism 9 under the support platform 7, place the laser tracker 4 above the single-stage sleeve 3 in a vertical state, and fix it on the gantry support 6 in a hanging manner, the center of the laser tracker 4 rotation shaft coincides with the axis of the single-stage sleeve 3, and the detection area completely covers the internal component assembly position of the single-stage sleeve 3 in a vertical state;

[0047] Step 2: evenly divide the single-stage sleeve 3 internal component operation area into multiple quadrants (this embodiment is evenly divided into 6 quadrants), adjust the height of the operation platform 8 by the lifting mechanism 9 to make the operation platform move height cover all component assembly operation areas;

[0048] Step 3: The operator assembles the parts in the operable quadrant inside the single-stage sleeve 3. After assembly, the laser tracker 4 scans and determines the assembly of the parts. If the scanning result does not meet the requirements, the operator fine-tunes the parts in the quadrant until the scanning result of the parts in the quadrant meets the assembly requirements. When the scanning result meets the requirements, the operator on the operation platform 8 moves to the next quadrant operation area with the lifting mechanism 9 for the assembly of the parts;

[0049] Step 4: Repeat step 3 until the assembly and fine-tuning process of all quadrants inside the single-stage sleeve 3 in the vertical state is completed.

[0050] Step 5: Put the single-stage sleeve 3 to be assembled into the already assembled single-stage sleeve 3 to form a multi-stage sleeve structure 11 in the contracted state. Install parallel guide rails and pulley devices between the single-stage sleeves 3 and connect them in a nested manner. Perform steps 2 to 4 on the single-stage sleeve 3 to be assembled.

[0051] Step 6: Repeat step 5 until the assembly and fine-tuning process of the multi-stage sleeve structure 11 in the contracted state is completed.

[0052] Step 7: Replace the gantry support 6 with a large gantry support 10, as shown in Figure 5 . The large gantry support 10 has sufficient stiffness to meet the support strength and size requirements of the multi-stage sleeve structure 11 in the fully expanded state. Place the laser tracker 4 on the fixed platform 12 and adjust the distance until the detection range completely covers the multi-stage sleeve structure 11 in the fully expanded state. Hang the same size steel wire rope on the outer wall of each single-stage sleeve 3. Adjust the expansion and contraction state of the multi-stage sleeve structure 11 by adjusting the weight of the sleeve with the steel wire rope.

[0053] Step 8: Gradually pull the steel wire rope to fully expand the multi-stage sleeve structure 11. Fix the steel wire rope on the gantry support. The laser tracker 4 detects the performance of the multi-stage sleeve structure 11 in the fully expanded state. Determine the sleeve and specific location of the parts that need to be fine-tuned based on the determination.

[0054] Step 9: Reduce the tension of the steel wire rope to make the multi-stage sleeve structure 11 contract to the position where the sleeve with the parts to be fine-tuned is at the lowest. The operator on the operation platform 8 reaches the position of the parts to be fine-tuned with the lifting mechanism 9 and performs fine-tuning.

[0055] Step 10: Repeat steps 8 to 9 until the determination of the expansion performance of the multi-stage sleeve structure 11 by the laser tracker 4 meets the requirements.

[0056] The outer envelope size of the operation platform is 30 to 50 mm smaller than the inner diameter of the single-stage sleeve to be assembled. A pair of handrails is provided on the top of the operation platform to assist the assembly process.

[0057] Although the present application has been disclosed with reference to the preferred embodiments, it is not intended to limit the present application, and any person skilled in the art can make possible changes and modifications to the technical solutions of the present application using the disclosed methods and technical contents without departing from the spirit and scope of the present application. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present application without departing from the technical solutions of the present application shall fall within the protection scope of the present application.

Claims

1. A method for precision assembly and performance testing of a multi-stage large-size thin-walled sleeve structure, wherein the multi-stage large-size thin-walled sleeve structure is connected by a plurality of single-stage sleeves, characterized in that, The method relies on the device including a laser tracker, a gantry support, a support platform, a lifting mechanism, an operation platform, comprising the following steps: S1, the single-stage sleeve in a completely vertical state is placed on the support platform with a circular hole in the middle, the operation platform is placed on the lifting mechanism and fixed on the plane, the operation platform is placed under the support platform and connected with the lifting mechanism, the operation platform passes through the circular hole in the middle of the support platform and enters the inside of the single-stage sleeve, the laser tracker is placed above the single-stage sleeve in a vertical state and fixed on the gantry support, and the detection area completely covers the inside of the single-stage sleeve; S2, the inside of the single-stage sleeve in a vertical state is evenly divided into multiple quadrants, the height of the operation platform is adjusted by the lifting mechanism, so that the operation platform can reach all the component assembly operation areas; S3, the components in the operable quadrant inside the single-stage sleeve are assembled, after assembly, the laser tracker is used to scan and determine the component assembly, when the scanning result does not meet the requirements, the components in the quadrant are fine-tuned until the scanning result of the components in the quadrant meets the assembly requirements, when the scanning result meets the requirements, the operation platform moves to the next quadrant operation area with the lifting mechanism; S4, repeat S3 until the component assembly and fine-tuning process of all quadrants inside the single-stage sleeve in a vertical state is completed; S5, a single-stage sleeve to be assembled is placed in the assembled single-stage sleeve to form a multi-stage sleeve structure in a contracted state, and S2 to S4 are performed on the single-stage sleeve to be assembled; S6, repeat S5 until the multi-stage sleeve structure in a contracted state completes the assembly and fine-tuning process; S7, place the laser tracker on the fixed platform, and detect the unfolding performance of the multi-stage sleeve structure by the laser tracker; S8, fully unfold the multi-stage sleeve structure, and determine the sleeve and specific position of the components that need to be fine-tuned according to the detection result of the laser detector; S9, the multi-stage sleeve structure in an unfolded state is contracted to the position where the sleeve of the components to be fine-tuned is at the lowest position, the operation platform is lifted to the position of the components to be fine-tuned by the lifting mechanism, and fine-tuning is performed; S10, repeat S8 to S9 until the determination result of the laser tracker detecting the unfolding performance of the multi-stage sleeve structure meets the requirements; The multi-stage large-size thin-wall sleeve structure, the parallel guide rails and pulley devices are installed between the single-stage sleeves, and are connected in a nested manner, and the outer wall of each single-stage sleeve is hung with a steel wire rope of the same specification; When detecting the unfolding performance of the multi-stage sleeve structure, the steel wire rope is pulled step by step, the pulling force of the steel wire rope cooperates with the gravity of the single-stage sleeve to realize the full-size unfolding process of the multi-stage sleeve structure, and after full-size unfolding, the steel wire rope is fixed on the gantry support, and the laser tracker detects the unfolding performance of the multi-stage sleeve.

2. The precision assembly and performance detection method of the multi-stage large-size thin-wall sleeve structure according to claim 1, characterized in that, The operation platform outer envelope size is less than the single-stage sleeve inner diameter 30 to 50 mm to be assembled, a pair of handrails are arranged on the top of the operation platform for assisting the assembly process, the bottom of the operation platform is connected and fixed with the upper plane of the lifting mechanism through fasteners, and moves up and down with the lifting mechanism, and the moving height covers all operation areas of the single-stage sleeve to be assembled. 3.The method according to claim 1, characterized in that, When detecting the assembly of the single-stage sleeve, the laser tracker is fixed on the gantry frame by hanging, the center of the rotation shaft of the laser tracker coincides with the axis of the single-stage sleeve, and when detecting the unfolding performance of the multi-stage sleeve structure, the laser tracker is placed on the fixed platform and the distance is adjusted until the detection range can completely cover the multi-stage sleeve structure in the full-size unfolded state. 4.The method according to claim 1, characterized in that, In S7, the gantry frame is replaced by a large gantry frame, and the large gantry frame meets the support strength and size requirements of the multi-stage large-size thin-wall sleeve structure in the full-size unfolded state. 5.The method according to claim 1, characterized in that, After determining the positions of the parts to be fine-adjusted of the multi-stage sleeve structure through the laser tracker detection results, the steel wire tension is reduced to make the single-stage sleeve where the parts to be fine-adjusted shrink to the lowest position, the steel wire is fixed on the gantry frame, the lifting mechanism lifts the operation platform to the position of the parts to be fine-adjusted for fine adjustment.

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