Fabrication method of high-precision, low-stress machined support device for parabolic antenna reflector

Abstract

This invention relates to a method for manufacturing a high-precision, low-stress machining support device for a parabolic antenna reflector, belonging to the field of carbon fiber composite material machining. The method involves manufacturing a machining support; the machining support is a right-angled triangular frame structure; the machining support includes a horizontal plate, a vertical plate, and diagonal ribs; mounting through holes are made in the vertical plate; four positioning connection holes and three countersunk pin holes are provided around the mounting through holes on the vertical plate surface; a machining ring is manufactured; threaded holes are provided circumferentially on the machining ring; the machining ring is installed on the vertical plate of the machining support; the reflector body is overlapped onto the machining ring and fixedly connected. This invention solves the problem of high-precision, low-stress machining of parabolic antenna reflectors, and the device can be used for high-precision, low-stress machining of parabolic antenna reflectors.

Description

Technical Field

[0001] This invention belongs to the field of carbon fiber composite material machining, and relates to a method for manufacturing a high-precision, low-stress machining support device for a parabolic antenna reflector. Background Technology

[0002] After the offset parabolic carbon fiber composite sandwich structure is formed, its shape requires machining. Due to the high precision requirements of the parabolic structure, auxiliary support devices are needed for low-stress machining. After the parabolic antenna reflector is formed, the outer panel openings need to be machined, the adapter mounting surface needs to be glued, the interface plane and openings of the adapter mounting surface need to be machined, and the reflector shape needs to be machined. The machining process may result in loss of reflector surface accuracy due to clamping and stress loading during machining. Current support devices cannot reduce the impact of the machining process on the reflector surface accuracy. Summary of the Invention

[0003] The technical problem solved by this invention is to overcome the shortcomings of the prior art and propose a method for manufacturing a high-precision, low-stress machining support device for parabolic antenna reflectors. This method solves the problem of high-precision, low-stress machining of parabolic antenna reflectors and enables high-precision, low-stress machining of parabolic antenna reflectors using this device.

[0004] The solution of the present invention is:

[0005] A method for fabricating a high-precision, low-stress machined support device for a parabolic antenna reflector, including:

[0006] Fabricate a machined support frame; the machined support frame is a right-angled triangular frame structure; the machined support frame includes horizontal plates, vertical plates, and diagonal ribs;

[0007] Make mounting through holes in the vertical plate; and set 4 positioning connection holes and 3 countersunk pin holes around the mounting through holes on the vertical plate surface.

[0008] Fabricate a machining ring; and set threaded holes around the circumference of the machining ring;

[0009] Install the machining ring onto the vertical plate of the machining support;

[0010] The reflective surface body is attached to the machined ring and then fixed in place.

[0011] In the above-mentioned method for manufacturing a high-precision, low-stress machined support device for the parabolic antenna reflector, the machined support is made of 45# steel and welded into shape; the machined support is then precision machined after being subjected to thermal stress relief.

[0012] In the above-mentioned method for manufacturing a high-precision, low-stress machined support device for a parabolic antenna reflector, the horizontal plate of the machined bracket is placed horizontally as a base support; the vertical plate is vertically connected to the side of the horizontal plate as a mounting bracket; and the diagonal rib connects the top of the vertical plate and the original edge of the horizontal plate to reinforce the machined bracket.

[0013] In the above-mentioned method for manufacturing a high-precision, low-stress machined support device for the parabolic antenna reflector, the flatness of the vertical plate is no greater than 0.02 mm; the flatness of the horizontal plate is no greater than 0.02 mm; and the perpendicularity between the vertical plate and the horizontal plate is no greater than 0.02 mm.

[0014] In the above-mentioned method for manufacturing a high-precision, low-stress machined support device for a parabolic antenna reflector, the mounting through hole is an elliptical through hole; four positioning connection holes and three countersunk pin holes are staggered and evenly distributed along the circumference of the mounting through hole.

[0015] In the above-mentioned method for manufacturing a high-precision, low-stress machined support device for a parabolic antenna reflector, the diameter of the positioning connection hole is 8mm, and the diameter of the countersunk pin hole is 8mm.

[0016] In the above-mentioned method for manufacturing a high-precision, low-stress machining support device for a parabolic antenna reflector, the machining ring is an elliptical ring structure, and the shape of the machining ring corresponds to the mounting through hole.

[0017] In the above-mentioned method for manufacturing a high-precision, low-stress machining support device for a parabolic antenna reflector, the threaded hole is used to mate with four positioning connection holes and three countersunk pin holes; the threaded hole is an M8 threaded hole, and the threaded hole corresponds to the position of the four positioning connection holes and the three countersunk pin holes to realize the threaded connection between the machining ring and the machining bracket.

[0018] In the above-mentioned method for manufacturing a high-precision, low-stress machining support device for the parabolic antenna reflector, the machining ring is made of aluminum alloy, which meets the requirements of good processing performance and low density.

[0019] In the above-mentioned method for manufacturing a high-precision, low-stress machining support device for a parabolic antenna reflector, the method for fixing the reflector body to the machining ring is as follows:

[0020] First, apply REDUX420 adhesive to the reflector body and the machining ring for bonding. Then, install a positioning pin along the axial direction of the reflector body to achieve a fixed connection between the reflector body and the machining ring.

[0021] The advantages of this invention compared to the prior art are:

[0022] (1) The support device manufactured by the present invention solves the problem of high-precision and low-stress machining of the parabolic antenna reflector and solves the problem of reflector deformation during machining.

[0023] (2) The flatness of the vertical plate of the present invention is not greater than 0.02mm; the flatness of the horizontal plate is not greater than 0.02mm; the perpendicularity between the vertical plate and the horizontal plate is not greater than 0.02mm, which fully ensures the accuracy of the subsequent installation of the product when manufacturing the machined bracket;

[0024] (3) The present invention adopts a staggered method of positioning connection holes and countersunk pin holes, which are respectively matched with threaded holes to ensure the installation strength and positioning accuracy of the machined bracket;

[0025] (4) The tooling and product are connected by adhesive bonding, which can reduce the impact of clamping stress on the surface accuracy. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the fit between the machined bracket and the machined ring of the present invention;

[0027] Figure 2 This is a schematic diagram showing the distribution of the positioning connection holes and countersunk pin holes in this invention;

[0028] Figure 3 This is a schematic diagram of the threaded hole distribution of the present invention;

[0029] Figure 4 This is a schematic diagram of the fit between the reflective surface body and the machined ring of the present invention. Detailed Implementation

[0030] The present invention will be further described below with reference to the embodiments.

[0031] After the reflector body is formed, the outer panel needs to be machined to create openings, the mounting surface needs to be glued, the interface plane and openings of the mounting surface need to be machined, and the shape of the reflector needs to be machined. The machining process may result in loss of surface accuracy due to clamping and stress loading during machining. To reduce the impact of machining on the surface accuracy of the reflector, this invention provides a method for manufacturing a high-precision, low-stress machining support device for parabolic antenna reflectors. This method solves the problem of high-precision, low-stress machining of parabolic antenna reflectors, and the device allows for high-precision, low-stress machining of parabolic antenna reflectors.

[0032] The fabrication method of a high-precision, low-stress machined support device for a parabolic antenna reflector includes the following steps:

[0033] To address machining accuracy issues and avoid the cumulative error loss caused by multiple tooling changes and datum rotations during fixture adjustments, a machining support was designed to ensure consistent machining accuracy with the target datum. Figure 1As shown, the machined bracket 3 is a right-angled triangular frame structure; the machined bracket 3 includes a horizontal plate, a vertical plate, and diagonal ribs; the machined bracket 3 is made of 45# steel and welded; the machined bracket 3 is manufactured by precision machining after stress relief through thermal cycling. The horizontal plate of the machined bracket 3 is placed horizontally as a base support; the vertical plate is vertically connected to the side of the horizontal plate as a mounting bracket; the diagonal ribs connect the top of the vertical plate and the original edge of the horizontal plate to reinforce the machined bracket 3.

[0034] The design specifies the geometric tolerance requirements for hole positions and planes: the flatness of the vertical plate should not exceed 0.02mm; the flatness of the horizontal plate should not exceed 0.02mm; and the perpendicularity between the vertical and horizontal plates should not exceed 0.02mm.

[0035] Make mounting through holes 7 in the vertical plate; and set 4 positioning connection holes 5 and 3 countersunk pin holes 6 around the mounting through holes 7 on the vertical plate surface; such as Figure 2 As shown, the mounting through hole 7 is an elliptical through hole; four positioning connection holes 5 and three countersunk pin holes 6 are staggered and evenly distributed along the circumference of the mounting through hole 7. The diameter of the positioning connection hole 5 is 8mm, and the diameter of the countersunk pin hole 6 is 8mm.

[0036] A machined ring 4 is fabricated to act as a transition between the reflective surface and the machined support; and threaded holes 8 are provided circumferentially on the machined ring 4, such as... Figure 3 As shown, the machined ring 4 has an elliptical ring structure, and the shape of the machined ring 4 corresponds to the mounting through hole 7.

[0037] The threaded hole 8 is used to mate with the four positioning connection holes 5 and the three countersunk pin holes 6. The threaded hole 8 is an M8 threaded hole, and the threaded hole 8 corresponds to the four positioning connection holes 5 and the three countersunk pin holes 6 to realize the threaded connection between the machined ring 4 and the machined bracket 3.

[0038] The machined ring 4 is made of aluminum alloy, which meets the requirements of good machinability and low density.

[0039] Install the machining ring 4 on the vertical plate of the machining bracket 3;

[0040] The reflective surface body 10 is attached to the machined ring 4 and then fixed.

[0041] The method for fixing the reflector body 10 to the machined ring 4 is as follows:

[0042] like Figure 4 As shown, the reflective surface body 10 and the machining ring 4 are first bonded together by applying REDUX420 adhesive, and then the positioning pin 9 is installed along the axial direction of the reflective surface body 10 to achieve the fixed connection between the reflective surface body 10 and the machining ring 4.

[0043] Choosing adhesive bonding for the connection between tooling and product can reduce the impact of clamping stress on surface accuracy.

[0044] The support device manufactured using this invention solves the problem of high-precision, low-stress machining of parabolic antenna reflectors and addresses the issue of reflector deformation during machining. It provides a design for a support device specifically for machining parabolic antenna reflectors. This support device is suitable for the machining of parabolic antenna reflectors, has a wide range of applications, and possesses high practical value.

[0045] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make possible changes and modifications to the technical solutions of the present invention by utilizing the methods and techniques disclosed above without departing from the spirit and scope of the present invention. Therefore, any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solutions of the present invention shall fall within the protection scope of the technical solutions of the present invention.

Claims

1. A method for manufacturing a high-precision low-stress machining support device for a parabolic antenna reflector, characterized by: The application relates to a machine-added support (3); the machine-added support (3) is a right-angled triangular frame structure; the machine-added support (3) comprises a horizontal plate, a vertical plate and a diagonal rib; A mounting through hole (7) is formed in the vertical plate; four positioning connecting holes (5) and three counterbore pin holes (6) are arranged on the surface of the vertical plate around the mounting through hole (7); A machine-added ring (4) is formed; and screw holes (8) are arranged on the circumference of the machine-added ring (4); The machine-added ring (4) is installed on the vertical plate of the machine-added support (3); The reflecting surface body (10) is overlapped on the machine-added ring (4) and is fixedly connected; The mounting through hole (7) is an elliptical through hole; the four positioning connecting holes (5) and the three counterbore pin holes (6) are arranged alternately and are uniformly distributed along the circumference of the mounting through hole (7); The machine-added ring (4) is an elliptical ring structure, and the shape of the machine-added ring (4) corresponds to the mounting through hole (7); The screw holes (8) are used for abutting against the four positioning connecting holes (5) and the three counterbore pin holes (6); the screw holes (8) are M8 screw holes, the screw holes (8) correspond to the positions of the four positioning connecting holes (5) and the three counterbore pin holes (6), and the screw holes (8) are used for realizing the screw connection between the machine-added ring (4) and the machine-added support (3); The method for fixedly connecting the reflecting surface body (10) and the machine-added ring (4) comprises the following steps: REDUX420 glue is coated between the reflecting surface body (10) and the machine-added ring (4) to realize glue jointing, then a positioning pin (9) is installed along the axial direction of the reflecting surface body (10), and the reflecting surface body (10) and the machine-added ring (4) are fixedly connected through the positioning pin (9). The machine-added support (3) is made of No. 45 steel and is formed by welding; and the machine-added support (3) is processed after heat cycle stress relief.

2. The method for manufacturing the high-precision low-stress machining support device for a parabolic antenna reflector according to claim 1, characterized in that: The horizontal plate of the machine-added support (3) is horizontally placed and used as a base support; the vertical plate is vertically connected with the side edge of the horizontal plate and used as an installation support; and the diagonal rib connects the top end of the vertical plate and the original edge of the horizontal plate and is used for reinforcing the machine-added support (3).

3. The method of claim 1, wherein the method further comprises: providing a plurality of support members; and attaching the plurality of support members to the plurality of support members of the support structure. The flatness of the vertical plate is not greater than 0.02 mm; the flatness of the horizontal plate is not greater than 0.02 mm; and the perpendicularity between the vertical plate and the horizontal plate is not greater than 0.02 mm.

4. The method for manufacturing the high-precision low-stress machining support device for a parabolic antenna reflector according to claim 3, characterized in that: The diameter of the positioning connecting hole (5) is 8 mm, and the diameter of the counterbore pin hole (6) is 8 mm.

5. The method of claim 1, wherein the method further comprises: providing a plurality of support members; and attaching the plurality of support members to the plurality of support members of the support structure. The machine-added ring (4) is made of aluminum alloy material and meets the requirements of good machining performance and low density.

6. The method of claim 1, wherein the method further comprises: providing a plurality of support members; and attaching the plurality of support members to the plurality of support members of the support structure. ​

Images