Contact ring for two-way coaxial rotary joint and machining clamp and machining method of contact ring

Abstract

The invention discloses a contact ring for a two-way coaxial rotary joint and a machining clamp and a machining method of the contact ring, and the metal contact ring comprises a circular ring, an inner cavity of which is used for a rotor of the two-way coaxial rotary joint to extend from bottom to top; the upper wall surface of the rotating shaft is contacted with the stator end surface of the double-path coaxial rotating joint; the upper ends of the two connecting rods are integrally connected with the lower wall surface of the circular ring; the arc-shaped bent plate and the circular ring are coaxially arranged, and the two ends of the arc-shaped bent plate are integrally connected with the lower ends of the two connecting rods respectively; the periphery of the arc-shaped bent plate is integrally connected with a fixed table; the positioning column is vertically arranged and located on the lower side of the arc-shaped bent plate, and the upper end of the positioning column is integrally connected with the fixing table; the lower end of the positioning column is used for extending into a positioning hole of a rotor of the two-way coaxial rotary joint; the metal contact ring is an integrated contact ring, the structure is simple, the rigidity is good, the number of procedures is small, heat treatment is not needed, the clamping and alignment times are reduced through the machining method, and therefore the problems that the metal contact ring is difficult to clamp, prone to deformation and unstable in quality are solved.

Description

Technical Field

[0001] The invention belongs to the field of microwave components and processing thereof, and in particular relates to a touch ring used for a double-path coaxial rotating joint and a processing fixture and a processing method thereof. Background Art

[0002] In the dual-way coaxial rotating joint, the metal contact ring is an important component of the dual-way coaxial rotating joint. The conductivity and wear resistance of the metal contact ring affect the electrical performance of the dual-way coaxial rotating joint. The accuracy that the metal contact ring can achieve directly affects the index level and product life of the entire system.

[0003] The metal contact ring in the prior art is of a petal-type circular contact type, with a frequency of 0-3GHZ, a voltage standing wave ratio of ≤1.2, and an insertion loss of ≤0.3dB.

[0004] Since the structure of metal contact rings is complex, they are usually irregular and thin-walled parts. Therefore, the processing accuracy of metal contact rings is high, which leads to processing difficulties. During the CNC processing, since the metal contact rings are small, complex in shape and easy to deform, the cutting amount cannot be too large, the processing efficiency is low, and the defective rate of parts is high.

[0005] The processing method of the metal contact ring in the prior art is: after processing the inner hole with an aluminum bronze rod, the inner hole is cut into 6-8 circular arcs by linear cutting on the circumference, and then the ring is expanded and then heat treated to make it elastic. During the use of the dual-path coaxial rotating joint, the circumference of the expanded ring is used to contact the inner hole of the stator to ensure the transmission of the electrical signal. Therefore, the processing method of the metal contact ring in the prior art has complicated procedures. During the production process, the rigidity of the contact ring often deteriorates after the ring is divided into petals during the expansion process, and it is easy to break. In addition, poor contact is easily caused during use. Summary of the invention

[0006] The purpose of the present invention is to provide a touch ring for a dual-path coaxial rotating joint and a processing fixture and processing method thereof, so as to solve the problem that the existing metal touch ring has a small contact area with the stator, and the metal touch ring is small and has a complex shape, which leads to easy deformation and difficulty in clamping during CNC processing.

[0007] The present invention adopts the following technical solution: a metal touch ring suitable for a dual-path coaxial rotating joint, comprising: The circular ring is arranged horizontally, and its inner cavity is used for the rotor of the double-way coaxial rotating joint to extend from bottom to top; its upper wall surface contacts the stator end surface of the double-way coaxial rotating joint; Two connecting rods are arranged vertically, and the upper ends of the two connecting rods are integrally connected to the lower wall surface of the ring; The arc-shaped bent plate is horizontally arranged and coaxially arranged with the circular ring, and its two ends are respectively connected to the lower ends of the two connecting rods; the periphery of the arc-shaped bent plate is connected to a fixed platform; The positioning column is vertically arranged and located at the lower side of the arc-shaped bent plate, and its upper end is integrally connected with the fixing platform; the lower end of the positioning column is used to extend into the positioning hole of the rotor of the dual-path coaxial rotating joint; Among them, the metal contact ring is used to rotate under the drive of the rotor of the dual-path coaxial rotating joint and maintain the transmission of electrical signals.

[0008] Furthermore, the distances between the fixing platform and two ends of the arc-shaped bent plate are equal.

[0009] A processing fixture for a metal contact ring of a dual-path coaxial rotating joint, the processing fixture comprising: The cutting positioning platform is fixed horizontally on the milling machine; its upper wall is provided with a turning groove from top to bottom; The contact ring fixing plate is located on the upper side of the cutting positioning platform and is arranged horizontally, and a bearing groove is opened on one side wall thereof and horizontally along the upper wall of the contact ring fixing plate from the side wall; The touch ring positioning plate is located on the upper side of the cutting positioning platform and is arranged horizontally. A receiving groove is opened on one side wall thereof and horizontally from the side wall surface along the lower wall surface of the touch ring positioning plate. The receiving groove and the bearing groove are arranged correspondingly to each other and form a receiving cavity. The receiving cavity is used to receive and clamp the strip-shaped metal blank, and the end of the metal blank is exposed outside the receiving cavity, so as to facilitate cutting the metal blank and obtain the metal touch ring. The flipping groove is used for: when the exposed part of the metal blank clamped by the touch ring positioning plate and the touch ring fixing plate arranged in sequence from top to bottom is processed to obtain the lower half of the metal contact ring, the touch ring positioning plate, the touch ring fixing plate and the clamped metal contact ring are flipped 180 degrees as a whole, so that the contact ring fixing plate is on the top and the contact ring positioning plate is on the bottom, so as to facilitate the re-processing of the exposed part of the metal blank flipped 180 degrees to obtain the metal contact ring.

[0010] Furthermore, the touch ring positioning plate is provided with a plurality of first fixing holes for fixing it to the touch ring fixing plate.

[0011] Furthermore, a plurality of second fixing holes for fixing the contact ring fixing plate to the cutting positioning platform are provided on the contact ring fixing plate.

[0012] Furthermore, the contact ring positioning plate is provided with a plurality of third fixing holes for fixing the metal blank in the accommodating cavity.

[0013] A processing method for a metal contact ring suitable for a dual-path coaxial rotating joint, the processing method comprising: Fix the touch ring positioning plate and the touch ring fixing plate on the cutting positioning platform, and keep the touch ring positioning plate on the top and the touch ring fixing plate on the bottom; Placing a strip-shaped metal blank in a receiving cavity formed by the bearing groove of the touch ring fixing plate and the receiving groove of the touch ring positioning plate, and making the end of the metal blank exposed outside the receiving cavity; The exposed upper part of the metal blank is processed to obtain the lower part of the metal contact ring; Flip the touch ring positioning plate, the touch ring fixing plate and the metal touch ring processed in the lower half by 180 degrees, so that the touch ring positioning plate is buckled downward into the flip groove of the cutting positioning platform, and keep the touch ring positioning plate at the bottom and the touch ring fixing plate at the top, and the upper half of the metal touch ring processed in the lower half faces upward; After the contact ring positioning plate and the contact ring fixing plate are fixed, the upper half of the metal contact ring is processed to obtain a processed metal contact ring.

[0014] The beneficial effects of the present invention are: The metal contact ring of the present invention is an integrated contact ring, which has a simple structure, good rigidity, few processes, and no need for heat treatment. The upper wall surface of the circular ring of the metal contact ring contacts the stator end surface of the double-path coaxial rotating joint, and the contact area is large, thereby making the rotor rotate smoothly and have good contact during the rotation process; The processing fixture of the present invention can stably clamp the metal blank and ensure that the end of the metal blank is exposed for easy processing; after the lower half of the metal contact ring is processed, the metal blank is rotated 180 degrees and then the upper half of the metal blank is processed. During the entire processing process, the metal blank and the processing fixture are not separated, thereby ensuring the accuracy of the metal contact ring and high processing efficiency; The processing method of the present invention can clamp multiple metal blanks at the same time during the processing. After the lower half of the metal contact ring is completely processed, the metal contact ring is turned over and the upper half of the metal contact ring is processed, which reduces the number of clamping and alignment times, thereby solving the problems of difficult clamping, easy deformation and unstable quality of the metal contact ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic structural diagram of the processing fixture of the present invention clamping a metal blank and processing the lower half of a metal contact ring; Figure 2 It is a structural schematic diagram of the processing fixture of the present invention clamping a metal blank and processing the upper half of a metal contact ring; Figure 3 It is a schematic structural diagram of the metal contact ring of the present invention; Figure 4 It is a schematic structural diagram of the touch ring fixing plate of the present invention; Figure 5 It is a schematic structural diagram of the touch ring positioning plate of the present invention.

[0016] Among them: 10, cutting positioning platform; 11, touch ring fixing plate; 12, touch ring positioning plate; 13, flip groove; 14, metal blank; 20, circular ring; 21, connecting rod; 22, arc bent plate; 23, fixing platform; 24, positioning column; 25, bearing groove; 26, receiving groove. DETAILED DESCRIPTION

[0017] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0018] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more. The "direction" in the present invention is based on the position of the present invention in a certain direction. Figure 1 Description of the trend in the state.

[0019] The present invention discloses a metal contact ring suitable for a dual-path coaxial rotating joint, such as Figure 3 As shown, it includes: a ring 20, two connecting rods 21, an arc-shaped bent plate 22, and a positioning column 24.

[0020] The ring 20 is arranged horizontally, and the inner cavity of the ring 20 is used for the rotor of the two-way coaxial rotating joint to extend from bottom to top; the upper wall surface of the ring 20 contacts the stator end surface of the two-way coaxial rotating joint. The lower wall surface of the ring 20 contacts the support ring of the rotor of the two-way coaxial rotating joint; the inner cavity of the ring 20 is used for the rotor of the two-way coaxial rotating joint to extend from bottom to top.

[0021] The two connecting rods 21 are vertically arranged, and the upper ends of the two connecting rods 21 are integrally connected to the lower wall surface of the ring 20 .

[0022] The arc-shaped curved plate 22 is arranged horizontally, and is coaxially arranged with the circular ring 20 . The two ends of the arc-shaped curved plate 22 are integrally connected to the lower ends of the two connecting rods 21 . The periphery of the arc-shaped curved plate 22 is integrally connected with a fixing platform 23 .

[0023] The positioning column 24 is arranged vertically, and the positioning column 24 is located on the lower side of the arc-shaped bent plate 22. The upper end of the positioning column 24 is integrally connected with the fixing platform 23; the lower end of the positioning column 24 is used to extend into the positioning hole of the rotor of the dual-way coaxial rotating joint; wherein, the metal contact ring is used to rotate under the drive of the rotor of the dual-way coaxial rotating joint and maintain the transmission of electrical signals.

[0024] The distances between the fixing platform 23 and two ends of the arc-shaped bent plate 22 are equal.

[0025] The metal contact ring in the prior art is a circumferential contact split-petal contact ring, which has poor processability and a minimum size of only 15 mm. Therefore, the stator inner cavity diameter of the dual-path coaxial rotating joint to which this type of metal contact ring is applicable can only be 15 mm. However, since the metal contact ring of the present invention has good structural rigidity and good processability, the maximum contour envelope size formed by the circular ring 20 and the fixed platform 23 can be 5.9 mm, which greatly reduces the stator inner cavity diameter of the dual-path coaxial rotating joint, thereby widening the frequency of the dual-path coaxial rotating joint to reach a frequency of 0-5 GHZ, a voltage standing wave ratio of ≤1.2, and an insertion loss of ≤0.2 dB.

[0026] The present invention also discloses a processing fixture for a metal touch ring of a dual-path coaxial rotating joint. The processing fixture comprises: a cutting positioning platform 10 , a touch ring fixing plate 11 , and a touch ring positioning plate 12 .

[0027] The cutting positioning platform 10 is horizontally fixed on the milling machine; the upper wall surface of the cutting positioning platform 10 is provided with a turning groove 13 from top to bottom.

[0028] The contact ring fixing plate 11 is located on the upper side of the cutting positioning platform 10 and is arranged horizontally. Figure 4 As shown, a bearing groove 25 is formed on one side wall of the contact ring fixing plate 11 and extends horizontally from the side wall along the upper wall of the contact ring fixing plate 11 .

[0029] The contact ring positioning plate 12 is located on the upper side of the contact ring fixing plate 11 and is arranged horizontally. Figure 5 As shown, a receiving groove 26 is opened horizontally on one side wall of the touch ring positioning plate 12 and along the lower wall surface of the touch ring positioning plate 12 from the side wall surface; the receiving groove 26 and the bearing groove 25 are arranged corresponding to each other and form a receiving cavity; the receiving cavity is used to receive and clamp the strip-shaped metal blank 14, and the end of the metal blank 14 is exposed outside the receiving cavity, thereby facilitating the cutting of the metal blank 14 and obtaining the metal contact ring.

[0030] The flip groove 13 is used to flip the contact ring positioning plate 12, the contact ring fixing plate 11 and the clamped metal contact ring as a whole 180 degrees when the exposed part of the metal blank 14 clamped by the contact ring positioning plate 12 and the contact ring fixing plate 11 arranged sequentially from top to bottom is processed to obtain the lower half of the metal contact ring, so that the contact ring fixing plate 11 is on the top and the contact ring positioning plate 12 is on the bottom, so as to facilitate re-processing the exposed part of the metal blank 14 flipped 180 degrees to obtain the metal contact ring.

[0031] The contact ring positioning plate 12 is provided with a plurality of first fixing holes for fixing the contact ring positioning plate 12 to the contact ring fixing plate 11 .

[0032] The contact ring fixing plate 11 is provided with a plurality of second fixing holes for fixing the contact ring to the cutting positioning platform 10 .

[0033] The contact ring positioning plate 12 is provided with a plurality of third fixing holes for fixing the metal blank 14 in the accommodating cavity.

[0034] The present invention also discloses a processing method for a metal contact ring suitable for a dual-path coaxial rotating joint, the processing method comprising: like Figure 1 As shown, the touch ring positioning plate 12 and the touch ring fixing plate 11 are fixed on the cutting positioning platform 10, and the touch ring positioning plate 12 is kept on the top and the touch ring fixing plate 11 is kept on the bottom; Place the strip-shaped metal blank 14 in the receiving cavity formed by the bearing groove 25 of the touch ring fixing plate 11 and the receiving groove 26 of the touch ring positioning plate 12, and make the end of the metal blank 14 exposed outside the receiving cavity; The exposed upper half of the metal blank 14 is processed to obtain the lower half of the metal contact ring; like Figure 2 As shown, the touch ring positioning plate 12, the touch ring fixing plate 11 and the metal touch ring processed in the lower half are turned over 180 degrees, so that the touch ring positioning plate 12 is buckled downward into the turning groove 13 of the cutting positioning platform 10, and the touch ring positioning plate 12 is kept at the bottom and the touch ring fixing plate 11 is kept at the top, and the upper half of the metal touch ring processed in the lower half is facing upward; After the contact ring positioning plate 12 and the contact ring fixing plate 11 are fixed, the upper half of the metal contact ring is processed to obtain a processed metal contact ring.

[0035] Embodiment 1: An aluminum bronze rod with a diameter of 8 mm and a length of 32 mm is selected, and the aluminum bronze rod is fixed and then milled into a metal blank 14 with a roughness of 1.6 μm and a size of 5 mm×5.5 mm×26 mm, and the metal blank 14 is fixed by using a touch ring fixing plate 11 and a touch ring positioning plate 12, and then the touch ring fixing plate 11 and the touch ring positioning plate 12 are fixed on the cutting positioning platform 10. The lower half of the metal blank 14 is processed first, and then the touch ring fixing plate 11, the touch ring positioning plate 12 and the clamped metal blank 14 are turned 180 degrees, and extended into the turning groove 13 of the cutting positioning platform 10 for fixing, and the upper half of the metal blank 14 is processed after fixing, and the metal touch ring is taken out after the processing is completed.

[0036] After measurement, the outer diameter of the processed metal contact ring 20 is 4.3mm, the inner diameter of the ring 20 is 3.7mm, the diameter of the connecting rod 21 is 0.5mm, the height of the connecting rod 21 is 2.7mm, the distance between the lower wall of the arc-shaped bent plate 22 and the lower wall of the ring 20 is 2.3mm; the thickness of the arc-shaped bent plate 22 is 0.3mm; the inner arc length of the arc-shaped bent plate 22 is 6.11mm, and the outer arc length of the arc-shaped bent plate 22 is 7.05mm; the inner chord length of the arc-shaped bent plate 22 is 3.69mm, and the outer chord length of the arc-shaped bent plate 22 is 4.29mm. The maximum contour envelope size formed by the ring 20 and the fixed platform 23 is Ф5.9mm; the diameter of the positioning column 24 is 0.5mm, and the height of the positioning column 24 is 2.7mm.

[0037] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A metal contact ring suitable for a dual-path coaxial rotating joint, characterized in that: include: The circular ring (20) is arranged horizontally, and its inner cavity is used for the rotor of the dual-path coaxial rotating joint to extend from bottom to top; its upper wall surface is in contact with the stator end surface of the dual-path coaxial rotating joint; Two connecting rods (21) are arranged vertically, and their upper ends are integrally connected to the lower wall surface of the circular ring (20); An arc-shaped bent plate (22) is horizontally arranged and coaxially arranged with the circular ring (20), and its two ends are respectively integrally connected to the lower ends of the two connecting rods (21); the periphery of the arc-shaped bent plate (22) is integrally connected with a fixing platform (23); A positioning column (24) is vertically arranged and located at the lower side of the arc-shaped bent plate (22), and its upper end is integrally connected to the fixing platform (23); the lower end of the positioning column (24) is used to extend into the positioning hole of the rotor of the dual-path coaxial rotating joint; The metal contact ring is used to rotate under the drive of the rotor of the dual-path coaxial rotating joint and maintain the transmission of electrical signals.

2. A metal contact ring suitable for a dual-path coaxial rotating joint according to claim 1, characterized in that: The distances between the fixing platform (23) and the two ends of the arc-shaped bent plate (22) are equal.

3. A processing fixture for a metal contact ring of a dual-path coaxial rotating joint, characterized in that: The processing fixture is used to clamp the metal contact ring according to claim 1 or 2, and the processing fixture comprises: The cutting positioning platform (10) is horizontally fixed on the milling machine; a turning groove (13) is formed on its upper wall from top to bottom; A touch ring fixing plate (11) is located on the upper side of the cutting positioning platform (10) and is arranged horizontally, and a bearing groove (25) is opened on one side wall surface and horizontally along the upper wall surface of the touch ring fixing plate (11); A touch ring positioning plate (12) is located on the upper side of the cutting positioning platform (10) and is arranged horizontally, and a receiving groove (26) is opened on one side wall thereof and horizontally from the side wall surface along the lower wall surface of the touch ring positioning plate (12); the receiving groove (26) and the bearing groove (25) are arranged corresponding to each other and form a receiving cavity; the receiving cavity is used to receive and clamp a strip-shaped metal blank (14), and the end of the metal blank (14) is exposed outside the receiving cavity, thereby facilitating cutting of the metal blank (14) and obtaining a metal touch ring; The flip groove (13) is used to flip the contact ring positioning plate (12), the contact ring fixing plate (11) and the clamped metal contact ring as a whole 180 degrees when the exposed portion of the metal blank (14) clamped by the contact ring positioning plate (12) and the contact ring fixing plate (11) arranged in sequence from top to bottom is processed to obtain the lower half of the metal contact ring, so that the contact ring fixing plate (11) is on top and the contact ring positioning plate (12) is on the bottom, so as to facilitate re-processing of the exposed portion of the metal blank (14) flipped 180 degrees to obtain the metal contact ring.

4. A processing fixture for a metal contact ring of a dual-path coaxial rotating joint according to claim 3, characterized in that: The contact ring positioning plate (12) is provided with a plurality of first fixing holes for fixing it to the contact ring fixing plate (11).

5. A processing fixture for a metal contact ring of a dual-path coaxial rotating joint according to claim 3, characterized in that: The contact ring fixing plate (11) is provided with a plurality of second fixing holes for fixing it to the cutting positioning platform (10).

6. A processing fixture for a metal contact ring of a dual-path coaxial rotating joint according to claim 3, characterized in that: The touch ring positioning plate (12) is provided with a plurality of third fixing holes for fixing the metal blank (14) in the accommodating cavity.

7. A method for processing a metal contact ring suitable for a dual-path coaxial rotating joint, characterized in that: The processing method is based on the processing fixture according to any one of claims 3 to 6, and the processing method comprises: Fixing the touch ring positioning plate (12) and the touch ring fixing plate (11) on the cutting positioning platform (10), and keeping the touch ring positioning plate (12) on the top and the touch ring fixing plate (11) on the bottom; Placing a strip-shaped metal blank (14) in a receiving cavity formed by the bearing groove (25) of the touch ring fixing plate (11) and the receiving groove (26) of the touch ring positioning plate (12), and allowing an end of the metal blank (14) to be exposed outside the receiving cavity; Processing the exposed upper half of the metal blank (14) to obtain the lower half of the metal contact ring; The touch ring positioning plate (12), the touch ring fixing plate (11) and the metal touch ring processed in the lower half are flipped 180 degrees, so that the touch ring positioning plate (12) is buckled downward into the flip groove (13) of the cutting positioning platform (10), and the touch ring positioning plate (12) is kept at the bottom and the touch ring fixing plate (11) is kept at the top, and the upper half of the metal touch ring processed in the lower half faces upward; After the contact ring positioning plate (12) and the contact ring fixing plate (11) are fixed, the upper half of the metal contact ring is processed to obtain a processed metal contact ring.

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