A riveting method for a folding and unfolding aerospace product

Abstract

The application relates to a riveting method for folding and unfolding aerospace products, and belongs to the technical field of aerospace. The method solves the problem that the accuracy of the relative positions of multiple rotating mechanisms of a product in a riveting process is difficult to control, and the rotating mechanisms are prone to movement jamming. The riveting method comprises the following steps: assembling a simulation joint in a riveting tool with a main body of a product into one; measuring the symmetry of an installation surface on the main body of the product relative to a neutral surface of an installation groove of the simulation joint; inserting a connecting lug into the installation surface of the main body of the product, and adjusting the gap between the connecting lug and the side surface of the installation surface; measuring the symmetry of a first rotating shaft hole on the connecting lug relative to the installation groove of the simulation joint; installing a secondary body of the product on the main body of the product; drilling and riveting holes on the connecting lug and the installation surface of the main body, and using a riveting piece to rivet and fix the main body and the secondary body. The riveting method has high one-time qualification rate, and the folding and unfolding mechanism after riveting has excellent assembly quality and use effect.

Description

Technical Field

[0001] This invention relates to the field of aerospace technology, and in particular to a riveting method for foldable and unfoldable aerospace products. Background Technology

[0002] To facilitate storage and transportation and save space, current aerospace products often employ a split riveting assembly structure for their folding and unfolding mechanisms. During storage and transportation, the product is in a folded state; during operation, the folding and unfolding mechanism rapidly transforms the product from a folded to an unfolded state. Therefore, the reliability of the folding and unfolding mechanism significantly impacts product performance. As product dimensions continue to increase, the number of critical rotating mechanisms connecting various parts within the folding and unfolding mechanism also increases, placing higher demands on the riveting accuracy and motion coordination between these mechanisms. Currently, these products can only be assembled manually to ensure accuracy. Riveting assembly is difficult, resulting in a low first-pass yield rate and often requiring multiple adjustments and rework, failing to meet design requirements and severely impacting product usability. Summary of the Invention

[0003] Based on the above analysis, the present invention aims to provide a riveting method for foldable and unfoldable aerospace products, in order to solve the problems of high difficulty and low pass rate in riveting and assembly of existing foldable and unfoldable aerospace products with multiple rotating mechanisms.

[0004] The objective of this invention is mainly achieved through the following technical solutions:

[0005] On one hand, the present invention provides a riveting method for foldable and unfoldable aerospace products, including the following steps:

[0006] Step 1: Assemble the simulated joint in the riveting fixture into the main body of the product;

[0007] Step 2: Secure the simulated connector to the platform;

[0008] Step 3: Measure the symmetry of the mounting surface on the product body relative to the neutral surface of the simulated connector mounting groove;

[0009] Step 4: After the symmetry is qualified, insert the connecting ear into the mounting surface of the product body, and use gauge blocks to adjust the gap between the connecting ear and the side of the mounting surface;

[0010] Step 5: Measure the symmetry of the first pivot hole on the connecting lug relative to the simulated connector mounting slot;

[0011] Step 6: After the symmetry is qualified, install the product's sub-body onto the product's main body;

[0012] Step 7: Adjust the sub-body and the main body to allow them to rotate freely. Then, drill riveting holes on the mounting surface connecting the lug and the main body, and use riveting fittings to rivet and fix the main body and the sub-body together.

[0013] Optionally, step 1 includes the following steps:

[0014] Step 11: Install the simulated connector on the positioning assembly surface of the main body;

[0015] Step 12: Adjust the relative position between the simulated connector and the main body to align the positioning holes;

[0016] Step 13: Use positioning elements to secure the simulated connector to the main body.

[0017] Optionally, step 2 includes the following steps:

[0018] Step 21: Place the simulated connector parallel to the platform. At this time, the product is in a horizontal position. Raise the bottom of the simulated connector appropriately.

[0019] Step 22: Adjust the distance between the product and the platform, and fix the simulation connector on the platform.

[0020] Optionally, the distance between the product and the platform in step 22 is 100mm to 150mm.

[0021] Optionally, between step 3 and step 4, the following method is also included: if the symmetry of the mounting surface on the product body relative to the neutral surface of the simulated connector mounting groove is not up to standard, it is adjusted by filing with a fitter or by adjusting with shims.

[0022] Optionally, step 6 includes the following steps:

[0023] Step 61: Remove the connector ear from the main body;

[0024] Step 62: Install the connecting lug, main shaft, joint bearing, and connecting shaft together onto the product sub-body, and then install the connecting lug together with the product sub-body onto the product main body;

[0025] Step 63: Adjust the position of each connecting ear by constraining the bracket, and use gauge blocks to adjust the gap between the connecting ear and the side of the main body mounting surface to ensure that the connecting ear is centered relative to the mounting surface and does not swing at an angle.

[0026] Optionally, step 8 is included after step 7: removing the riveting fixture.

[0027] Optionally, between step 5 and step 6, the following method is also included: if the symmetry of the first pivot hole on the connecting lug relative to the simulated connector mounting groove is not up to standard, it is adjusted by filing the connecting lug mounting surface with a fitter or by adjusting the shims.

[0028] Optionally, the symmetry of the first pivot hole on the connecting ear relative to the simulated connector mounting slot is controlled within 0.03 mm.

[0029] On the other hand, the present invention also provides a riveting fixture with a rotating mechanism for performing the above-mentioned riveting method. The riveting fixture includes a simulated joint, a block assembly, a drive rod, and a positioning element; the simulated joint is used to fix the main body of the product to determine its relative position; the block assembly is used to support and constrain the main body and the sub-body of the product; the drive rod is used to simulate a power element, and rotating the drive rod drives the sub-body to rotate to simulate a real motion state and analyze the motion; the simulated joint and the main body of the product are connected by the positioning element to constrain their positions.

[0030] Optionally, the simulated connector includes a wider first end and a narrower second end; the first end of the simulated connector is provided with a mounting groove with an opening facing the product body, and the mounting groove is used to place the positioning assembly surface on the product body.

[0031] Optionally, the second end of the simulated connector is provided with a rotating shaft hole, and the drive rod passes through the rotating shaft hole to drive the sub-body of the product to rotate.

[0032] Optionally, the pad group includes a first pad group and a second pad group, wherein the first pad group is used to support and constrain the head and sub-body of the main body along the width direction, and the second pad group is used to support and constrain the body and sub-body of the main body along the width direction.

[0033] Optionally, the first pad group includes an upper pad and a lower pad. The inner surfaces of the upper pad and the lower pad are adapted to the outer surfaces on both sides of the head of the main body and the outer surfaces on both sides of the sub-body, respectively, so that the upper pad and the lower pad can provide support and constraint for the head of the main body and the sub-body after they are engaged.

[0034] Optionally, the upper pad has a slot corresponding to the mounting surface of the main body, and the slot extends through the lower pad to ensure that the riveting area of ​​the connecting lug can be fully exposed, thereby facilitating the riveting operation.

[0035] Optionally, a support is provided on the lower pad at a position corresponding to the sub-body surface near the pivot. The length of the support column is adjustable to support the sub-body of the product, thereby controlling the sub-body of the product at the chord plane of the main body.

[0036] Optionally, the second pad group includes an upper pad and a lower pad. The inner surfaces of the upper pad and the lower pad of the second pad group are adapted to the outer surfaces of the two sides of the main body and the two sides of the sub-body, respectively, so that the upper pad and the lower pad of the second pad group can provide support and constraint for the main body and the sub-body after they are engaged.

[0037] Optionally, the upper pad and the lower pad are provided with mounting holes at corresponding positions to fix them together by means of fasteners.

[0038] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects:

[0039] (1) The riveting method of this invention does not directly use riveting fixtures to connect the main body and sub-body of the product in one go through connecting lugs. Instead, the main body and sub-body are first trial-assembled to ensure smooth rotation without jamming. Then, the connecting lugs are fixed, and riveting holes are drilled on the connecting lugs. After confirming that the sub-body rotates smoothly relative to the main body without jamming, the main body and sub-body are riveted together. The products obtained by the above riveting method have a high first-pass yield rate (the first-pass yield rate is increased from 50% to over 95%), shorten the production cycle, and provide an effective solution to the difficulties in the riveting assembly process of similar folding products. Furthermore, the riveted product has flexible movement and excellent assembly quality and performance.

[0040] (2) This invention innovatively designs a dedicated riveting fixture for folding and unfolding mechanisms with multiple rotating mechanisms that have large structural dimensions and high assembly precision requirements. The riveting fixture specifically includes a simulated joint, a block assembly, a drive rod, and a positioning component. The simulated joint is used to fix the main body of the product to determine its relative position. The block assembly is used to support and constrain the main body and sub-body of the product. The drive rod simulates a power element; rotating the drive rod drives the sub-body to rotate, simulating the actual motion state and analyzing the motion. The simulated joint and the main body of the product are connected by the positioning component to constrain their positions. This riveting fixture integrates positioning and clamping functions. Riveting using this fixture makes it easy to control the accuracy of the relative positions of multiple rotating mechanisms during the riveting process, resulting in a high first-pass yield (increasing the first-pass yield from 50% to over 95%), shortening the production cycle, and providing an effective solution to the difficulties in riveting assembly processes for similar folding products. Furthermore, the riveted product mechanism moves flexibly and possesses excellent assembly quality and performance.

[0041] (3) The present invention provides a support on the lower pad block at a position corresponding to the pivot of the sub-body, and by setting the length of the support column to be adjustable, it can support the sub-body of the product, thereby controlling the sub-body of the product at the chord plane of the main body.

[0042] (4) By setting a constraint bracket on the surface of the upper pad facing the lower pad, the present invention can limit the swing of the connecting ear in the angular direction, thereby preventing the product's sub-body from swinging too much.

[0043] (5) By setting a slot on the upper pad corresponding to the mounting surface of the main body, the present invention can ensure that the riveting area of ​​the connecting lug is fully exposed, thereby facilitating the riveting operation.

[0044] In this invention, the above-described technical solutions can be combined with each other to achieve more preferred combinations. Other features and advantages of this invention will be set forth in the following description, and some advantages will become apparent from the description or may be learned by practicing the invention. Attached Figure Description

[0045] The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Throughout the drawings, the same reference numerals denote the same parts.

[0046] Figure 1 This is a structural diagram of the folded and unfolded product of the present invention;

[0047] Figure 2 This is a schematic diagram of the main structure of the foldable and unfolded product of the present invention;

[0048] Figure 3 This is a schematic diagram of the mounting surface of the connecting ear of the present invention;

[0049] Figure 4 This is a schematic diagram of the riveting fixture structure of the present invention;

[0050] Figure 5 This is a schematic diagram of the connecting ear shaft hole of the present invention;

[0051] Figure 6 This is a schematic diagram of the prototype assembly of the main body and the sub-body of the present invention;

[0052] Figure 7 This is a schematic diagram of the folding and unfolding product of the present invention assembled with the riveting fixture.

[0053] Figure label:

[0054] 1-Main body; 2-Riveting component; 3-Sub-body; 4-Connecting lug; 5-Main shaft; 6-Connecting shaft; 7-Joint bearing; 8-Simulated connector; 9-Upper pad; 10-Screw; 11-Lower pad; 12-Positioning component; 13-Drive rod; 14-Slot; 15-First shaft hole; 16-Constraint bracket; 17-Support column; 18-Head; 19-Body; 20-Positioning assembly surface; 21-Through hole; 22-Mounting surface; 23-Second shaft hole; 24-First end; 25-Second end; 26-Mounting groove; 27-Pin hole; 28-Shaft end; 29-Glue. Detailed Implementation

[0055] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which constitute a part of the present invention and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not intended to limit the scope of the present invention.

[0056] Example 1

[0057] A specific embodiment of the present invention discloses a riveting method for foldable and unfoldable aerospace products, which enables high-precision riveting of rotating mechanisms. This embodiment does not directly connect the main body and sub-body of the product in one go using riveting fixtures via connecting lugs. Instead, the main body and sub-body are first trial-assembled to ensure smooth rotation without jamming. Then, riveting holes are drilled on the mounting surfaces of the connecting lugs and the main body, and riveting components are used to secure the main body and sub-body. Products obtained using this riveting method have a high first-pass yield rate (increasing from 50% to over 95%), shortening the production cycle and providing an effective solution to the difficulties in riveting assembly processes for similar foldable products. Furthermore, the riveted product exhibits flexible movement, excellent assembly quality, and superior performance.

[0058] The riveting method in this embodiment mainly includes two parts: trial assembly of the main body and the sub-body (including steps one to six below), and ensuring smooth rotation between the main body and the sub-body without jamming before drilling riveting holes on the mounting surface connecting the lug and the main body, and using riveting components to rivet and fix the main body and the sub-body (including steps seven to thirteen below). Specifically, it includes the following steps:

[0059] First, assemble the simulated connector 8 with the main body 1 of the product as one unit.

[0060] like Figure 3 As shown, first, the simulated connector 8 is installed on the positioning assembly surface 20 on the main body. The relative position between the simulated connector and the main body is adjusted so that the three positioning holes on it are aligned. Then, three positioning parts are used to fix the simulated connector 8 to the main body 1.

[0061] Second, place the simulated connector 8 parallel to the platform. At this time, the folded and unfolded product is in a horizontal position. Raise the bottom of the simulated connector 8 appropriately and control the distance between the product and the platform between 100mm and 150mm. After adjusting the distance appropriately, fix the simulated connector firmly on the platform.

[0062] Third, use a dial indicator to measure the symmetry of the mounting surfaces of the four connecting lugs 4 on the main body of the product relative to the neutral surface of the simulated connector mounting groove. The symmetry must be controlled within 0.03mm. If the symmetry exceeds 0.03mm, it needs to be adjusted by filing with a fitter or by adjusting with shims.

[0063] Fourth, such as Figure 5 As shown, insert the four connecting ears into the four connecting ear mounting surfaces 22 on the main body 1 of the product. Use gauge blocks to adjust the gap between the connecting ears 4 and the side of the mounting surface 22 to ensure that the connecting ears are centered relative to the mounting surface and do not swing at an angle.

[0064] Fifth, use a dial indicator to measure the symmetry of the first pivot hole on each of the four connecting lugs relative to the simulated connector mounting slot 26. The symmetry must be controlled within 0.03mm. If the symmetry exceeds 0.03mm, it needs to be adjusted by filing the mounting surface of the connecting lugs or by adjusting the shims to ensure that the pivot hole of the connecting lug is located on the chord plane of the main body.

[0065] Sixth, such as Figure 6 As shown, remove the four connecting lugs from the main body, and then install them together with the main shaft, joint bearing, and connecting shaft onto the product sub-body. Then, install the connecting lugs together with the product sub-body onto the main body. Adjust the position of each connecting lug using the constraint bracket, and use gauge blocks to adjust the gap between the connecting lugs and the side of the main body mounting surface to ensure that the connecting lugs are centered relative to the mounting surface and do not swing at an angle.

[0066] Seventh, use gauge blocks or feeler gauges to roughly adjust the gap between the mating surfaces of the sub-body and the main body, ensuring that the gap is uniform at about 1.5mm. At this point, insert the drive rod through the second rotating hole on the simulation connector into the sub-body and connect it to the main rotating shaft fixed on the sub-body. If the drive rod cannot be inserted into the sub-body, the mating gap between the sub-body and the main body needs to be adjusted until the drive rod can be inserted smoothly.

[0067] Eighth, rotate the drive rod to make the sub-body rotate relative to the main body. Further fine-tune the position of the connecting lug or the meshing gap between the main body and the sub-body according to the rotation flexibility and jamming. The adjustment amount should be controlled within 0.3mm. After adjustment, use a force gauge to measure the rotational resistance torque of the sub-body relative to the main body. The resistance torque should be controlled within 1N·m.

[0068] Ninth, use tape to fix the constraint bracket and gauge block to the sub-body to prevent movement; remove the gauge block between the connecting lug and the main body mounting surface, and fill the gap between them with 502 glue 29. Note that glue 29 should not drip into the joint bearing. Fill the 4 connecting lugs with glue in sequence until the glue is completely cured.

[0069] Tenth, place the four lower pads on the platform, loosen the simulation connector, and place the main body, sub-body, and simulation connector together on the four lower pads. Then install the four upper pads, adjust the position of each pad so that the riveting area of ​​the connecting lug is fully exposed in the slotted area of ​​the upper pad. Tighten the upper and lower pads with screws, and adjust the support column on the lower pad to press the sub-body against the main body to control the sub-body at the chord plane of the main body and prevent the sub-body from rotating.

[0070] Eleventh, mark the riveting hole positions on the connecting lugs. Each connecting lug contains two riveting holes. Drill the riveting holes on the mounting surfaces of the connecting lugs and the main body, ensuring all riveting holes are drilled through. Also mark countersunk holes. The countersunk holes are used to accommodate the rivet heads of the riveted parts, preventing them from protruding from the outer surface of the main body. The countersunk holes are arranged in a positive and negative pattern, with four on each side.

[0071] Twelfth, loosen the support column on the lower pad, remove the tape and constraint bracket fixed to the sub-body, check the rotation of the sub-body relative to the main body again to ensure that the sub-body rotates smoothly without jamming, and then tighten the support column.

[0072] Thirteenth, use rivets to rivet the connecting lugs to the main body. During riveting, use a alternating riveting method (one riveting from top to bottom, the other from bottom to top) according to the countersunk hole situation. This ensures even force distribution on both sides, preventing deformation due to unilateral force that could lead to abnormal rotation of the sub-body. The rivet head after riveting must not exceed the top surface of the simulated joint. See the schematic diagram of the product assembled with the riveting fixture. Figure 7 .

[0073] Fourteenth, after riveting is completed, remove all pads and check that the gap between the main body and the sub-body should be controlled within 1.5±0.3mm; rotate the drive rod to drive the sub-body to rotate relative to the main body, check the rotation flexibility and jamming, and measure the rotation resistance torque of the sub-body relative to the main body again, which should be controlled within 1N·m.

[0074] Fifteenth, remove the drive rod and the three positioning parts that secure the simulated connector. Remove the simulated connector from the main body and clean the glue and other excess material around the connecting lugs to ensure the product is clean. At this point, the riveting assembly of the product is complete.

[0075] Example 2

[0076] Another specific embodiment of the present invention discloses a riveting fixture for completing the riveting method of Embodiment 1, realizing the riveting of foldable and unfoldable aerospace products with large structural dimensions and high assembly precision requirements and containing multiple rotating mechanisms.

[0077] like Figure 1As shown, the foldable and deployable aerospace product of the present invention includes a main body 1 and a secondary body 3. The main body 1 and the secondary body 3 are connected by a connecting lug 4.

[0078] The main body 1 includes a head 18 and a body 19, with the width of the head 18 being greater than the width of the body 19.

[0079] like Figure 2 As shown, grooves with openings facing the side surface are provided on the edge of one side of the head and on two opposite surfaces. The part where the two grooves are connected forms a positioning assembly surface 20. A pin hole 27 for the positioning member 12 to pass through is provided on the positioning assembly surface.

[0080] See also Figure 2 The head is also provided with a through hole 21 for the main rotating shaft to pass through. The through hole 21 extends along the length of the main body 1 and is used for subsequent trial rotation of the secondary body 3.

[0081] like Figure 3 As shown, the head 18 of the main body 1 has a mounting surface 22 on one side edge for mounting the connecting lug 4, and the body 19 of the main body 1 also has a mounting surface 22 on one side edge for mounting the connecting lug 4. The upper and lower surfaces of the mounting surface 22 are both lower than the upper and lower surfaces of the main body, forming a stepped surface with the upper and lower surfaces of the main body. The mounting surface 22 has a riveting hole for the riveting component 2 to pass through, and the riveting hole extends along the thickness direction of the main body.

[0082] Specifically, the head of the main body has one mounting surface 22, and the body of the main body has three mounting surfaces 22.

[0083] The connecting lug 4 includes a snap-fit ​​end connected to the mounting surface 22 of the main body and a pivot end 28 connected to the sub-body. The snap-fit ​​end includes a snap-fit ​​groove, within which the mounting surface 22 of the main body 1 is positioned. Figure 1 As shown, the top and bottom surfaces of the engagement groove are provided with rivet holes for the riveting member 2 to pass through. For example, there are two rivet holes on both the top and bottom surfaces of the engagement groove, and the positions of the rivet holes on the top and bottom surfaces correspond to each other.

[0084] In a preferred embodiment, one of the two riveting holes on the top surface of the engagement groove is provided with a countersunk hole at one end. The countersunk hole is used to accommodate the nail head of the riveting component 2 and prevent the nail head from protruding from the outer surface of the main body.

[0085] The connecting ear 4 has a first rotating hole 15 at its pivot end, which extends through the thickness direction of the connecting ear 4.

[0086] The auxiliary body 3 has a slot (not shown in the figure) on the edge of the side where it connects to the main body 1 to accommodate the rotating end of the connecting lug 4. The connecting lug 4 and the auxiliary body are connected by a connecting shaft 6. A spherical bearing 7 is provided in the first rotating hole 15 of the connecting lug 4, and the spherical bearing 7 is sleeved on the connecting shaft 6.

[0087] In addition, a groove (not shown in the figure) is provided at the bottom of the edge of the side where the sub-body connects to the main body.

[0088] Specifically, there are multiple connecting ears and multiple connecting hinges. The connecting hinge closest to the head of the main body is the main hinge 5.

[0089] The following describes the riveting fixtures used to achieve the aforementioned folding and unfolding aerospace products.

[0090] like Figure 4 As shown, the riveting fixture in this embodiment includes a simulated joint 8, a pad assembly, a drive rod 13, and a positioning component 12.

[0091] The simulated connector 8 is used to fix the main body 1 of the folding and unfolding aerospace product in order to determine the relative position of the main body.

[0092] The pad block assembly is used to support and constrain the main body 1 and sub-body 3 of foldable and deployable aerospace products.

[0093] The drive rod 13 is used to simulate a power element. One end of the drive rod is a handle, and the other end is connected to the main rotating shaft 5 fixed on the sub-body 3. Taking the second rotating shaft hole 23 on the simulated connector 8 as the base point, the drive rod 13 is rotated to drive the sub-body 3 to rotate, thereby simulating the real motion state and analyzing the motion.

[0094] The simulated connector 8 and the main body 1 of the folding and unfolding aerospace product are connected by a positioning element 12 to constrain their positions. For example, the positioning element 12 is a positioning pin.

[0095] like Figure 4 As shown, the simulated connector 8 includes a wider first end 24 and a narrower second end 25, meaning that the simulated connector is wide at one end and narrow at the other.

[0096] The first end 24 of the simulated connector is provided with a mounting groove 26 with an opening facing the main body 1. The mounting groove 26 is used to place the positioning assembly surface 20 on the main body of the foldable and unfoldable aerospace product.

[0097] To facilitate the placement of the positioning assembly surface 20 on the main body, the mounting groove extends along the length of the simulated joint.

[0098] In one possible implementation, the top and bottom surfaces of the mounting groove 26 are parallel to the mounting groove, serving as reference surfaces for subsequent riveting. Pin holes for the positioning member 12 to pass through are provided at corresponding positions on the top and bottom surfaces of the mounting groove 26.

[0099] Specifically, the number of pin holes varies depending on the length of the positioning assembly surface 20. In this embodiment, there are 3 pin holes.

[0100] like Figure 3 As shown, the second end 25 of the simulated connector is provided with a second pivot hole 23, and the drive rod 13 passes through the second pivot hole 23 to drive the sub-body 3 of the folding and unfolding aerospace product to rotate.

[0101] like Figure 4 As shown, the pad group includes a first pad group and a second pad group. The first pad group is used to support and constrain the head 18 and the sub-body 3 of the main body 1 along the width direction, and the second pad group is used to support and constrain the body 19 and the sub-body 3 of the main body 1 along the width direction.

[0102] The first pad group includes an upper pad 9 and a lower pad 11. The inner surfaces of the upper pad 9 and the lower pad 11 are adapted to the outer surfaces on both sides of the head 18 of the main body 1 and the outer surfaces on both sides of the sub-body 3, so that the upper pad 9 and the lower pad 11 can provide support and constraint for the head of the main body and the sub-body after they are engaged.

[0103] like Figure 4 As shown, in a preferred embodiment, the upper pad 9 has a slot 14 corresponding to the mounting surface 22 of the main body 1. The slot extends through the lower pad 11 to ensure that the riveting area of ​​the connecting lug 4 is fully exposed, thus facilitating the riveting operation. The lower pad 11 has a support column 17 at a position corresponding to the sub-body surface near the connecting shaft. The length of this support column is adjustable, so that by adjusting the support column 17 to support the sub-body 3 of the product, the sub-body 3 of the product is controlled at the chordal plane of the main body 1.

[0104] Furthermore, mounting holes are provided at corresponding positions on the upper and lower pads to secure them together using screws 10.

[0105] Continue to refer to Figure 4 In this embodiment, a constraint bracket 16 is provided on the surface of the upper pad facing the lower pad to limit the angular swing of the connecting lug 4, thereby preventing the product sub-body 3 from swinging too much. The constraint bracket 16 is provided with a limiting groove, and the inner surface of the limiting groove is arc-shaped.

[0106] like Figure 4 As shown, the second pad group has a similar structure to the first pad group. The difference is that the inner surface of the upper pad 9 and the inner surface of the lower pad 11 of the second pad group are adapted to the outer surfaces on both sides of the body 19 of the main body and the outer surfaces on both sides of the sub-body 3, so that the upper pad 9 and the lower pad 11 can provide support and constraint for the body of the main body and the sub-body after they are fastened together.

[0107] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A riveting method for folding and unfolding a space product, characterized in that, It adopts riveting tool, which includes simulation joint, cushion block group, driving rod and positioning part; the simulation joint is used to fix the main body of product to determine the relative position of the main body; the cushion block group is used to support and constrain the main body and the secondary body of product; the driving rod is used to simulate power element, and the secondary body is driven to rotate by rotating the driving rod to simulate real motion state and analyze motion condition; The riveting method comprises the following steps: Step 1: assemble the simulation joint in the riveting tool and the main body of product into one; Step 2: fix the simulation joint on the platform; Step 3: measure the symmetry of the installation surface on the main body of product relative to the neutral surface of the installation slot of the simulation joint; Step 4: after the symmetry is qualified, insert the connecting lug into the installation surface of the main body of product, and adjust the gap between the connecting lug and the side surface of the installation surface by using the gauge block; Step 5: measure the symmetry of the first rotating shaft hole on the connecting lug relative to the installation slot of the simulation joint; Step 6: after the symmetry is qualified, install the secondary body of product on the main body of product; Step 7: adjust the secondary body and the main body to make them rotate flexibly, then drill and rivet the holes on the connecting lug and the installation surface of the main body, and fix the main body and the secondary body by using the riveting part.

2. The riveting method according to claim 1, characterized by, The step 1 comprises the following steps: Step 11: install the simulation joint at the positioning assembly surface on the main body; Step 12: adjust the relative position between the simulation joint and the main body to make the positioning holes on the simulation joint aligned; Step 13: fix the simulation joint and the main body by using the positioning part.

3. The riveting method according to claim 1, characterized by, The step 2 comprises the following steps: Step 21: place the simulation joint parallel to the platform, at this time, the product is placed horizontally, and the simulation joint is appropriately raised; Step 22: adjust the distance between the product and the platform, and fix the simulation joint on the platform.

4. The riveting method according to claim 3, characterized in that, The distance between the product and the platform in the step 22 is 100mm-150mm.

5. The riveting method according to claim 1, characterized by, The step 3 and the step 4 further comprise: if the symmetry of the installation surface on the main body of product relative to the neutral surface of the installation slot of the simulation joint is unqualified, adjust by the way of bench work filing or gasket adjustment.

6. The riveting method according to claim 1, characterized by The step 6 comprises the following steps: Step 61: take down the connecting lug from the main body; Step 62: install the connecting lug, main rotating shaft, joint bearing and connecting rotating shaft together on the secondary body of product, and install the connecting lug together with the secondary body of product on the main body of product again; Step 63: adjust the positions of the connecting lugs by using the constraint support, and adjust the gap between the connecting lug and the side surface of the installation surface of the main body by using the gauge block to ensure that the connecting lug is distributed centrally relative to the installation surface and does not swing in the angular direction.

7. The riveting method according to claim 1, characterized by, The step 7 further comprises step 8: remove the riveting tool.

8. The riveting method according to claim 1, characterized by, The step 5 and the step 6 further comprise: if the symmetry of the first rotating shaft hole on the connecting lug relative to the installation slot of the simulation joint is unqualified, adjust by the way of bench work filing the installation surface of the connecting lug or gasket adjustment.

9. The riveting method according to claim 8, characterized in that, The symmetry of the first rotating shaft hole on the connecting lug relative to the installation slot of the simulation joint is controlled within 0.03mm.

10. A riveting tool characterized by, The riveting tool is used to complete the riveting method in any one of claims 1-9.

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