Device and method for unfolding and folding ultra-long thin-wall composite material supporting structure

Abstract

The invention discloses an unfolding and folding device for an ultra-long thin-wall composite material supporting structure. The unfolding and folding device comprises a rolling shaft and a flattening device. The flattening device comprises a first-stage pressing roller set, a second-stage pressing roller set, a third-stage pressing roller set and a flattening roller set which are sequentially arranged from front to back. The first-stage compression roller set, the second-stage compression roller set and the third-stage compression roller set respectively comprise n1, n2 and n3 first-stage compression rollers, n2 and n3 second-stage compression rollers and n3 third-stage compression rollers which are distributed in the width direction of the supporting structure, wherein n3 > n2 > n1 > = 1; the flattening roller set comprises a plurality of flattening rollers distributed in the width direction of the supporting structure. The invention further discloses an unfolding and folding method for the ultra-long thin-wall composite material supporting structure, and the method comprises the steps that the end of the supporting structure is flattened and fixed to a rolling shaft, and the flattening device is assembled in place; and the winding shaft rotates in the forward direction or the reverse direction, and winding or unwinding of the supporting structure is achieved. High-precision unfolding and folding of the hectometer-level ultra-long thin-wall composite material supporting structure can be achieved, and wide application prospects are achieved.

Description

Technical Field

[0001] The invention relates to a device and method for unfolding and retracting an ultra-long thin-wall composite material support structure, belonging to the technical field of composite materials. Background Art

[0002] The deployable payload of spacecraft is a form of satellite payload with high storage ratio and high precision. It is also an important way to realize the functions and performance of future super-large satellite payloads. The ultra-long thin-walled composite material support structure is the core component of the deployable payload, which is used to support the deployment of super-large payloads in space and ensure the pointing accuracy of the payload. The support structure is a single-piece support structure with a length of 100 meters, ultra-lightweight and high rigidity. It is required to ensure that the thickness of a single support structure does not exceed 0.4mm, and the straightness is better than 1mm / 10m. Ultra-thin prepreg must be used for layering, and high-precision plane continuous layering and compounding are required during the prepreg layering process.

[0003] The existing thin-walled composite material support structure is deployed manually, which mainly has the following problems:

[0004] (1) The supporting structure of thin-walled composite materials is a curved surface. The folding process is to transform the curved surface into a flat surface, and the unfolding process is to restore the flat surface to a curved surface. In this process, it is very easy for external forces to cause stress concentration and cause product damage.

[0005] (2) For ultra-long support structures of 100 meters, the accuracy of folding and unfolding cannot be controlled, which can easily cause the support structure to twist and cause product damage.

[0006] (3) Manual deployment cannot measure the deployment torque of the support structure, and cannot achieve the effect of mechanical analysis of the deployment process. Summary of the invention

[0007] The purpose of the present invention is to overcome the above-mentioned defects and provide an ultra-long thin-walled composite material support structure deployment and stowage device and method, which solves the technical problem that the ultra-long thin-walled composite material support structure is easily damaged during deployment. The present invention can achieve high-precision deployment and stowage of ultra-long thin-walled composite material support structures of the 100-meter level, and has a wide range of application prospects.

[0008] In order to achieve the above-mentioned object of the invention, the present invention provides the following technical solutions:

[0009] An ultra-long thin-wall composite material support structure unfolding and retracting device, comprising: a reel and a flattening device;

[0010] The flattening device is used to flatten the support structure in the folded state, and the winding shaft winds up the support structure in the flattened state;

[0011] The flattening device includes a primary pressure roller group, a secondary pressure roller group, a tertiary pressure roller group and a flattening roller group which are arranged in sequence from front to back; the primary pressure roller group, the secondary pressure roller group and the tertiary pressure roller group respectively include n1, n2 and n3 primary pressure rollers, secondary pressure rollers and tertiary pressure rollers distributed along the width direction of the supporting structure, wherein n3>n2>n1≥1; the flattening roller group includes multiple flattening rollers distributed along the width direction of the supporting structure.

[0012] Further, the reel includes a cylinder and a cover plate;

[0013] The cylinder is made of metal, and grooves are arranged on the cylindrical surface of the cylinder along the generatrix direction;

[0014] The cover is made of aluminum;

[0015] The front end of the support structure in a flattened state output from the flattening device is installed in the groove, and the front end of the support structure is pressed and fixed in the groove by the cover plate.

[0016] Furthermore, the first-stage pressing roller, the second-stage pressing roller and the third-stage pressing roller are silicone rubber spherical rollers, and the flattening roller is a silicone rubber cylindrical roller.

[0017] Furthermore, by adjusting the arrangement of the first-level, second-level and third-level pressure rollers along the winding direction and perpendicular to the winding direction, the stress of the first-level, second-level and third-level pressure rollers on the curved surface of the supporting structure is minimized, and the pressure of the first-level, second-level and third-level pressure rollers is perpendicular to the curved surface of the supporting structure.

[0018] Furthermore, a plurality of first-stage pressing rollers, a plurality of second-stage pressing rollers, a plurality of third-stage pressing rollers and a plurality of flattening rollers are connected in series through metal rods and the spacing between the metal rods is adjustable.

[0019] Further, the plurality of flattening rollers in the flattening roller set cover the maximum flattening width of the support structure.

[0020] Furthermore, it also includes a deviation correction device;

[0021] The deviation correction device is arranged between the reel and the flattening device, and is located on one side of the supporting structure;

[0022] The deviation correction device is used to sense the running direction of the support structure boundary after flattening, so as to control the running direction of the support structure.

[0023] Further, a torque testing device is also included;

[0024] The torque testing device is installed on the reel and is used to monitor the torque during the extension and retraction process of the support mechanism.

[0025] Furthermore, when the torque testing device monitors the torque, the primary, secondary and tertiary pressing rollers are separated from the supporting mechanism, and the flattening roller presses the supporting mechanism.

[0026] A method for deploying and retracting an ultra-long thin-walled composite material support structure is implemented according to the above-mentioned ultra-long thin-walled composite material support structure deployment and retracting device, comprising:

[0027] Flatten the end of the support structure and fix it on the reel, and assemble the flattening device in place;

[0028] The reel is rotated in the positive or reverse direction to realize the reeling or unreeling of the supporting structure.

[0029] Compared with the prior art, the present invention has at least one of the following beneficial effects:

[0030] (1) The present invention solves the damage problem during the deployment and retraction of ultra-long thin-walled support structures, and achieves high-precision deployment and retraction of ultra-long thin-walled composite material support structures of the order of 100 meters;

[0031] (2) The device of the present invention uses automated means and online monitoring equipment to study the development process, saving labor costs and improving the scientificity and safety of product testing;

[0032] (3) The present invention innovatively proposes the arrangement of various levels of pressure rollers along the winding direction and perpendicular to the winding direction, so as to reduce the stress concentration caused by the change of the supporting structure from a curved surface to a flat surface during the winding process, avoid damage to the supporting structure during the winding and unwinding process, and ensure the overall quality of the supporting structure.

[0033] (4) The device of the present invention proposes a solution of online precision control during the winding and unwinding process, and improves the winding and unwinding precision of the product by adding an automatic correction mechanism and rationally designing the position and detection method of the correction mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a schematic diagram of the stowage device of the present invention. DETAILED DESCRIPTION

[0035] The following detailed description of the present invention will make the features and advantages of the present invention more clear and explicit.

[0036] The word "exemplary" is used exclusively herein to mean "serving as an example, embodiment, or illustration." Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments. Although various aspects of the embodiments are shown in the drawings, the drawings are not necessarily drawn to scale unless otherwise noted.

[0037] The objective of the present invention is achieved through the following technical solutions:

[0038] like Figure 1The present invention discloses an ultra-long thin-walled composite material support structure deployment and retraction device 1, which is used to realize the deployment and retraction of a thin-walled composite material support structure 2. The ultra-long thin-walled composite material support structure deployment and retraction device 1 is a metal frame structure, including a front and a rear part, namely a support structure flattening part and a winding part, which are connected as a whole with screws. The screws are detachable, and the spacing between the front and rear parts can be adjusted by adjusting the tightness of the screws.

[0039] Specifically, the ultra-long thin-walled composite material support structure unfolding and retracting device 1 includes a reel 3, a deviation correction device 4, a primary pressure roller 5, a secondary pressure roller 6, a tertiary pressure roller 7, a flattening roller 8, a torque testing device 9 and other modules.

[0040] The thin-walled composite material support structure 2 is a product of different cross-sectional shapes and specifications, namely, an unfolding and retracting object. The maximum flattened width of the support structure does not exceed 700 mm, and the wall thickness does not exceed 1 mm. This device can adjust the parameters of each module according to the size and performance parameters of different support structures to avoid damage to the support structure during the unfolding and retracting process.

[0041] The winding shaft 3 is a metal circular cylinder with a diameter of 200-300mm, and a core shaft is connected in the middle, which can realize the rotation in both directions at different speeds, and the rotation speed is adjustable. There is a groove along the generatrix direction on the cylindrical surface of the winding shaft, the groove width is 2-3mm, the depth is 2-3mm, and M3 threaded holes are arranged at a certain distance inside, and an aluminum plate is covered on the top to ensure that the aluminum plate is placed in the groove, and the highest point of the aluminum plate is flush with the cylindrical surface of the barrel.

[0042] The correction device 4 is a correction sensor (distance sensor). According to the characteristics of support structures with different cross-sectional shapes, the position of the correction sensor during the winding process of the support structure is planned, and the edge-finding method is determined to detect whether the support structure deviates from the vertical winding direction during the winding process. If there is a deviation, it is adjusted immediately to ensure the accuracy of the winding and unwinding of the support structure.

[0043] The first-stage roller 5, the second-stage roller 6, and the third-stage roller 7 are spherical rollers made of silicone rubber, and the flattening roller is a roller made of silicone rubber. It has a certain elasticity after being subjected to force. At the same time, it is necessary to ensure that the pressure of the roller on the support structure is perpendicular to the plane of the support structure to ensure that there is no damage to the support structure. All rollers are in the form of up and down pressure, and the rollers can be adjusted up and down. Among them, 3 groups of rollers are designed to be adjustable along the winding direction and the vertical winding direction. According to the cross-sectional shape, material, ply, length, etc. of the support structure, the transition area size of the support structure from the curved surface to the plane is calculated through simulation analysis, and then the distribution law of rollers at each level is simulated and calculated, which basically presents a distribution from dense to sparse, ensuring the lowest product stress.

[0044] The torque testing device 9 is a torque sensor that can sense the torsional moment value during the expansion and contraction of the support structure, and record the torque values ​​in different processes through real-time detection equipment. When testing the torque, only one set of flattening rollers is retained, and the upper and lower rollers of the remaining rollers are in a separated state. The purpose of testing the torque is to initially judge the product's anti-deformation ability and to help simulate and analyze the calculation of the transition area length and the distribution form of each level of rollers.

[0045] The specific steps are as follows:

[0046] (1) Fixing of thin-walled composite support structure

[0047] Flatten and fix the end of the support structure in the groove of the metal cylinder of the winding shaft, tighten and fix the support structure with screws and aluminum plates, and then assemble the deviation correction device, various levels of pressure rollers and flattening rollers in place.

[0048] (2) Adjustment of the deviation correction device

[0049] Place the sensor of the deviation correction device on one side of the flattened support structure, set the initial boundary position, and then start the sensor for real-time monitoring.

[0050] (3) Adjustment of torque test device

[0051] Start the torque test device, set the parameters, and monitor the torsional torque curve during the extension and retraction process in real time.

[0052] (4) Development and collection process

[0053] Start the unfolding and retracting device to first reel in the support structure and then unfold it.

[0054] Example:

[0055] like Figure 1 As shown, it is an overall schematic diagram of the stowage device, which can realize the stowage process of support structures of different shapes and specifications.

[0056] First, flatten and fix the end of the support structure in the groove of the metal tube of the winding shaft, tighten and fix the support structure with screws and aluminum plates, and then assemble the deviation correction device, various levels of pressure rollers and flattening rollers in place.

[0057] Then place the sensor of the correction device to the boundary of one side of the flattened support structure, set the initial boundary position, and then start the sensor for real-time monitoring. Start the torque testing device, set the parameters, and monitor the torsional torque curve of the expansion and contraction process in real time.

[0058] Finally, the unfolding and retracting device is started to first reel in the supporting structure and then unfold it.

[0059] The present invention has been described in detail above in conjunction with specific implementations and exemplary examples, but these descriptions cannot be understood as limiting the present invention. Those skilled in the art understand that, without departing from the spirit and scope of the present invention, a variety of equivalent substitutions, modifications or improvements may be made to the technical solution of the present invention and its implementation methods, all of which fall within the scope of the present invention. The scope of protection of the present invention shall be subject to the attached claims.

[0060] The contents not described in detail in the specification of the present invention belong to the common knowledge of those skilled in the art.

Claims

1. A super-long thin-wall composite material support structure deployment and retraction device, characterized in that: include: A reel (3) and a flattening device; The flattening device is used to flatten the support structure in a folded state, and the winding shaft (3) winds up the support structure in the flattened state; The flattening device includes a primary pressure roller group, a secondary pressure roller group, a tertiary pressure roller group and a flattening roller group which are arranged in sequence from front to back; the primary pressure roller group, the secondary pressure roller group and the tertiary pressure roller group respectively include n1, n2 and n3 primary pressure rollers, secondary pressure rollers and tertiary pressure rollers distributed along the width direction of the supporting structure, wherein n3>n2>n1≥1; the flattening roller group includes multiple flattening rollers distributed along the width direction of the supporting structure.

2. The ultra-long thin-wall composite material support structure deployment and retraction device according to claim 1, characterized in that: The reel (3) comprises a cylinder and a cover plate; The cylinder is made of metal, and grooves are arranged on the cylindrical surface of the cylinder along the generatrix direction; The cover is made of aluminum; The front end of the support structure in a flattened state output from the flattening device is installed in the groove, and the front end of the support structure is pressed and fixed in the groove by the cover plate.

3. The device for stowing and unfolding a super-long thin-wall composite material support structure according to claim 1, characterized in that: The first-stage pressing roller, the second-stage pressing roller and the third-stage pressing roller are spherical silicone rubber rollers, and the flattening roller is a cylindrical silicone rubber roller.

4. The device for stowing and unfolding a super-long thin-wall composite material support structure according to claim 3, characterized in that: By adjusting the arrangement of the primary, secondary and tertiary pressure rollers along the winding direction and perpendicular to the winding direction, the stress of the primary, secondary and tertiary pressure rollers on the curved surface of the supporting structure is minimized, and the pressure of the primary, secondary and tertiary pressure rollers is perpendicular to the curved surface of the supporting structure.

5. The device for unfolding and retracting an ultra-long thin-wall composite material support structure according to claim 1, characterized in that: A plurality of primary pressing rollers, secondary pressing rollers, tertiary pressing rollers and flattening rollers are connected in series through metal rods, and the spacing between them is adjustable.

6. The device for unfolding and retracting an ultra-long thin-wall composite material support structure according to claim 1, characterized in that: The plurality of flattening rollers in the flattening roller set covers the maximum flattened width of the support structure.

7. The device for unfolding and retracting an ultra-long thin-wall composite material support structure according to claim 1, characterized in that: It also includes a deviation correction device; The deviation correction device is arranged between the reel (3) and the flattening device, and is located on one side of the supporting structure; The deviation correction device is used to sense the running direction of the support structure boundary after flattening, so as to control the running direction of the support structure.

8. The device for stowing and unfolding a super-long thin-wall composite material support structure according to claim 1, characterized in that: Also includes a torque testing device (9); The torque testing device (9) is installed on the reel (3) and is used to monitor the torque during the extension and retraction process of the support mechanism.

9. The device for stowing and unfolding a super-long thin-wall composite material support structure according to claim 8, characterized in that: When the torque testing device (9) monitors the torque, the first, second and third pressure rollers are separated from the supporting mechanism, and the flattening roller presses the supporting mechanism.

10. A method for deploying and retracting an ultra-long thin-walled composite material support structure, implemented according to an ultra-long thin-walled composite material support structure deployment and retracting device according to any one of claims 1 to 9, characterized in that: include: Flatten the end of the support structure and fix it on the reel (3), and assemble the flattening device in place; The reel (3) is rotated in a positive direction or a reverse direction to realize the reeling or unreeling of the supporting structure.

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