A resin rod connection structure for on-track construction of space structures

Abstract

The present invention discloses a resin rod connection structure for on-track construction of space structures, which relates to the field of aerospace technology and solves the problem that the quality and stability of the curved ultrasonic connection of on-track space resin rods are difficult to ensure. The present invention includes a longitudinal beam and a longitudinal beam joint, and the longitudinal beam and the longitudinal beam joint are cylindrical structures; one end of the longitudinal beam is connected to the beam rod, and the other end is provided with a connection locking structure, and a locking structure and a plurality of energy-conducting ribs are provided inside the connection locking structure; one end of the longitudinal beam joint is connected to the beam rod, and the other end is provided with a locking groove, and one end of the longitudinal beam joint provided with a locking groove is inserted into the connection locking structure of the longitudinal beam, and the locking groove and the locking structure cooperate to lock, and a plurality of energy-conducting ribs are welded together with the longitudinal beam joint by an ultrasonic welder. The present invention performs a preliminary fixed connection by cooperating and locking the locking structure provided on the longitudinal beam with the locking groove on the longitudinal beam joint, and then ultrasonically welds the energy-conducting ribs provided on the longitudinal beam to the longitudinal beam joint to complete the connection of the rods.

Description

Technical Field

[0001] The invention relates to the field of aerospace technology, and in particular to a resin rod connection structure used for on-orbit construction of a space structure. Background Art

[0002] At present, large-scale space truss structures used in aerospace are connected and formed on-orbit, such as satellite solar panel brackets, telescope back frames in very long baseline interferometry, space radio telescopes and reflector back frames. These large truss structures currently used in space are all manufactured on the ground with integral structure launch or foldable structures, and launched into space for deployment. This method is not only limited by the harsh mechanical properties of the launch stage of the carrier rocket, but also greatly increases the launch cost and prolongs the mission cycle. In contrast, the construction and application of space structures on-orbit obviously has irreplaceable technical and economic advantages. However, at present, in space, the on-orbit construction with resin rods as the assemblable structural material still has the following difficulties: 1. Under the extreme space coupling environment conditions of microgravity, high vacuum, and alternating hot and cold in space, the quality of the curved surface ultrasonic connection of the resin rod is difficult to guarantee. 2. In the process of on-orbit manufacturing of resin rods, the winding and ultrasonic connection of truss rods are carried out in series, which puts forward requirements for the stability and continuity of the curved surface ultrasonic connection.

[0003] Therefore, in the aerospace field, when constructing space structures on-orbit, it is necessary to consider the impact of extreme coupling environmental factors, and to ensure the quality and stability of the arc surface connection of resin rod materials. It is urgent to conduct in-depth research and exploration of an arc surface ultrasonic connection method for resin rods that can serve the on-orbit construction of space structures. Summary of the invention

[0004] In order to solve the above-mentioned problem that the quality and stability of the curved ultrasonic connection of the on-track spatial resin rods are difficult to ensure, the present invention hereby proposes a resin rod connection structure for on-track construction of spatial structures. The present invention uses the locking structure provided on the longitudinal beam to cooperate with the locking groove on the longitudinal beam joint to lock for preliminary fixed connection, and then ultrasonically welds the plurality of energy-conducting ribs provided on the longitudinal beam to the longitudinal beam joint to complete the connection of the rods.

[0005] The present invention proposes a resin rod connection structure for on-track construction of a spatial structure, which specifically includes a longitudinal beam and a longitudinal beam joint, wherein the longitudinal beam and the longitudinal beam joint are cylindrical structures; one end of the longitudinal beam is connected to the beam rod, and the other end is provided with a connection locking structure, and a locking structure and a plurality of energy guiding ribs are provided inside the connection locking structure; one end of the longitudinal beam joint is connected to the beam rod, and the other end is provided with a locking groove, and one end of the longitudinal beam joint provided with the locking groove is inserted into the connection locking structure of the longitudinal beam, the locking groove and the locking structure cooperate to lock, and the plurality of energy guiding ribs are welded together with the longitudinal beam joint by an ultrasonic welder.

[0006] Furthermore, a docking guide structure is provided at the end of the connection locking structure.

[0007] Furthermore, two vibration-inducing side seams are symmetrically arranged along the axial direction on the connection and locking structure.

[0008] The beneficial effects of the resin rod connection structure for on-track construction of a space structure described in the present invention are:

[0009] (1) The resin rod connection structure for on-track construction of spatial structures described in the present invention overcomes the problem that the quality and stability of the curved ultrasonic connection of on-track spatial resin rods are difficult to ensure. The locking structure provided on the longitudinal beam cooperates with the locking groove on the longitudinal beam joint to perform a preliminary fixed connection, and then ultrasonic welding is performed between a plurality of energy guiding ribs provided on the longitudinal beam and the longitudinal beam joint to complete the connection of the rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0011] In the attached picture:

[0012] Figure 1 It is a schematic diagram of the internal structure of a longitudinal beam of a resin rod connection structure for on-track construction of a space structure according to the present invention;

[0013] Figure 2 It is a three-dimensional structural schematic diagram of a longitudinal beam of a resin rod connection structure for on-track construction of a space structure according to the present invention;

[0014] Figure 3 It is a three-dimensional structural schematic diagram of a longitudinal beam joint of a resin rod connection structure for on-track construction of a space structure according to the present invention;

[0015] Figure 4 It is a schematic diagram of a butt joint structure of a longitudinal beam and a longitudinal beam joint of a resin rod connection structure for on-track construction of a space structure according to the present invention;

[0016] Figure 5 It is a front view of a longitudinal beam and a longitudinal beam joint butt joint structure of a resin rod connection structure for on-track construction of a space structure according to the present invention;

[0017] Figure 6 It is a cross-sectional view of a longitudinal beam and a longitudinal beam joint butt joint structure of a resin rod connection structure for on-track construction of a space structure according to the present invention at AA;

[0018] Among them: 1-locking structure, 2-centering structure, 3-energy guiding ribs, 4-jointing guide structure, 5-vibration side seam, 6-longitudinal beam, 7-longitudinal beam joint, 71-locking groove. DETAILED DESCRIPTION

[0019] The specific implementation of the present invention is further described in detail below with reference to the accompanying drawings:

[0020] Specific implementation method 1: See Figure 1-Figure 6 The present embodiment is described in detail. The resin rod connection structure for on-track construction of a spatial structure described in the present embodiment specifically includes a longitudinal beam 6 and a longitudinal beam joint 7, wherein the longitudinal beam 6 and the longitudinal beam joint 7 are cylindrical structures; one end of the longitudinal beam 6 is connected to the beam rod, and the other end is provided with a connection locking structure, and a locking structure 1 and a plurality of energy guiding ribs 3 are provided inside the connection locking structure; one end of the longitudinal beam joint 7 is connected to the beam rod, and the other end is provided with a locking groove 71, and one end of the longitudinal beam joint 7 provided with the locking groove 71 is inserted into the connection locking structure of the longitudinal beam 6, and the locking groove 71 cooperates with the locking structure 1 for locking, and a plurality of energy guiding ribs 3 are welded together with the longitudinal beam joint 7 by an ultrasonic welder, and the longitudinal beam 6 and the longitudinal beam joint 7 serve as a joint between two beam rods so that the beam rods can be effectively and reliably connected together.

[0021] The end of the connection locking structure is provided with a docking guide structure 4, and the end of the longitudinal beam joint 7 provided with a locking groove 71 can be smoothly inserted into the connection locking structure.

[0022] The connection locking structure is symmetrically provided with two vibration-inducing side seams 5 along the axial direction. The connection locking structure is divided into two upper and lower parts by the two vibration-inducing side seams 5. When ultrasonic welding is performed, the connection locking structure vibrates under the action of ultrasonic waves to enhance the welding effect.

[0023] A centering structure 2 is further provided inside the connection locking structure between the locking structure 1 and the dry energy conductor 3 , and the centering structure 2 is used to ensure that the axes of the longitudinal beam 6 and the longitudinal beam joint 7 are in line with each other.

[0024] The specific welding process of the resin rod connection structure for on-track construction of a space structure described in the present invention is as follows:

[0025] Under the action of ultrasound, arc surface lap welding is required when welding the interface of the rod material. Compared with traditional plane ultrasonic welding, the ultrasonic vibration generated by the ultrasonic welder is along the direction of the welding pressure, and the contact stress generated by the welding pressure in the contact arc surface is all directed to the normal direction of the arc surface. The farther away from the symmetric center of the arc surface, the greater the deviation between the contact stress and the vibration direction, and the smaller the contact stress. In this case, the positions on both sides of the arc surface will not be welded firmly. Therefore, the opening diameter of the ultrasonic welder welding head is designed to be smaller than the outer cylindrical surface of the connection and locking structure. In this way, during welding, three compressive stress areas will be generated in the contact arc surface, at the top of the arc surface and on both sides of the arc surface. The top of the arc surface is the contact surface melted and welded under the longitudinal ultrasonic vibration, and the compressive stress areas on both sides of the arc surface will cause torsional dislocation between the contact surfaces under the longitudinal ultrasonic vibration, thereby also generating temperature rise, so that the molten contact surface is welded. After completing the arc welding of the upper half of the connection and locking structure, restarting the ultrasonic vibration will produce far-field welding, so that the lower half of the arc surface is also welded.

[0026] To summarize the above implementation cases, the resin rod connection structure for on-track construction of spatial structures described in the present invention overcomes the problem that the quality and stability of the curved ultrasonic connection of on-track spatial resin rods are difficult to ensure. The locking structure 1 provided on the longitudinal beam 6 is locked in cooperation with the locking groove 71 on the longitudinal beam joint 7 to perform a preliminary fixed connection, and then the several energy guiding ribs 3 provided on the longitudinal beam 6 are ultrasonically welded to the longitudinal beam joint 7 to complete the connection of the rods.

[0027] The specific embodiments described above further illustrate the purpose, technical solutions and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the invention. It can also be a reasonable combination of the features recorded in the above implementation methods. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A resin rod connection structure for on-track construction of a space structure, characterized in that: The invention comprises a longitudinal beam (6) and a longitudinal beam joint (7), wherein the longitudinal beam (6) and the longitudinal beam joint (7) are cylindrical structures; one end of the longitudinal beam (6) is connected to the beam rod, and the other end is provided with a connection locking structure, and a locking structure (1) and a plurality of energy conducting ribs (3) are provided inside the connection locking structure; one end of the longitudinal beam joint (7) is connected to the beam rod, and the other end is provided with a locking groove (71), and one end of the longitudinal beam joint (7) provided with the locking groove (71) is inserted into the connection locking structure of the longitudinal beam (6), and the locking groove (71) and the locking structure (1) are locked in cooperation, and the plurality of energy conducting ribs (3) are welded together with the longitudinal beam joint (7) by an ultrasonic welding machine; The end of the connection locking structure is provided with a docking guide structure (4); Two vibration-inducing side seams (5) are symmetrically arranged along the axial direction on the connection locking structure.

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