Composite material thin-wall round pipe surface polishing device and method

Abstract

The invention provides a composite material thin-wall round pipe surface polishing device and method. The composite material thin-wall round pipe surface polishing device comprises a supporting assembly, a polishing assembly, a motor assembly and a base. The supporting assembly, the polishing assembly and the motor assembly are installed on the base. The supporting assembly comprises a tensioning screw, a front bevel connection cushion block, a pawl unit, an annular spring and a rear bevel connection cushion block. The front bevel connection cushion block and the rear bevel connection cushion block are arranged on the two sides of the pawl unit; the tensioning screw is used for tensioning the front bevel connection cushion block and the rear bevel connection cushion block; the annular spring is used for providing circumferential uniform pre-tightening force to ensure that the pawl unit is synchronously attached to the front bevel connection cushion block and the rear bevel connection cushion block, the pawl unit expands outwards to be attached to the interior of the composite material thin-wall round pipe under the action of oblique force of the front bevel connection cushion block and the rear bevel connection cushion block, and the composite material thin-wall round pipe is fixed under the friction force of the pawl unit. The grinding device is suitable for grinding the surface of the composite material thin-wall round pipe, the grinding efficiency can be improved while clamping damage is reduced when the grinding device is used for grinding the composite material thin-wall round pipe, and the grinding device is convenient to operate and simple and reliable in structure.

Description

Technical Field

[0001] The present invention belongs to the field of composite material polishing devices, and in particular relates to a composite material thin-walled circular tube surface polishing device and method. Background Art

[0002] With the continuous advancement and development of satellite communications, the demand for various antenna reflectors is increasing, and the surface precision requirements are becoming increasingly higher. Traditional carbon fiber composite skinned aluminum honeycomb sandwich structure antenna reflectors can no longer meet the increasingly high precision surface requirements. Carbon fiber composite skinned carbon fiber sandwich structure antenna reflectors have the advantages of high strength and high resistance to thermal deformation. This structure has become the main structure for ultra-high precision antenna reflectors.

[0003] The conventional skin carbon fiber sandwich structure is made of several composite thin-walled circular tubes glued together. To ensure the quality of the bonding, the outer surface of the composite thin-walled circular tubes needs to be polished.

[0004] Traditional polishing methods involve manually holding a thin-walled composite tube and then sanding it with sandpaper. Composite tubes have low stiffness and strength. Inattentive handling can lead to uneven force, potentially damaging the tube. Sanding also creates uneven pressure on the tube, which lacks adequate internal support and can also damage it. Manual polishing also suffers from low efficiency and inconsistent polishing quality. Polishing methods are a pressing issue hindering the efficiency and quality of ultra-high-precision antenna reflector development.

[0005] Patent document CN115415862A provides a round tube grinding device, which supports the round tube through support wheels connected to support rods. This solution cannot effectively support thin-walled round tubes made of composite materials and is very likely to cause grinding damage and support damage.

[0006] Patent document CN116000735A provides a universal automatic grinding machine device based on round tubes, which is composed of multiple motors. It also has the problem of being unable to effectively support thin-walled round rods of composite materials and cannot adapt well to various sizes and specifications, especially small-diameter thin-walled round tubes of composite materials. At the same time, the composite material powder caused by grinding, such as carbon fiber powder, can easily cause damage to complex electrical structures. Summary of the Invention

[0007] In view of the defects in the prior art, the purpose of the present invention is to provide a surface grinding device and method for thin-walled circular tubes made of composite materials.

[0008] According to the present invention, a composite material thin-walled circular tube surface grinding device includes a support component, a grinding component, a motor component and a base;

[0009] The support assembly, the grinding assembly and the motor assembly are mounted on the base;

[0010] The support assembly is used to fix the composite material thin-walled circular tube;

[0011] The polishing assembly is used to polish the surface of the composite material thin-walled circular tube;

[0012] The motor assembly is used to drive the support assembly to rotate;

[0013] Wherein, the support assembly includes a tightening screw, a front bevel pad, a pawl unit, a ring spring, and a rear bevel pad;

[0014] The front bevel pad and the rear bevel pad are arranged on both sides of the pawl unit;

[0015] The tightening screw is used to pull the front bevel pad and the rear bevel pad closer together;

[0016] The annular spring is used to provide a circumferentially uniform pre-tightening force to ensure that the pawl unit is synchronously fitted with the front bevel pad and the rear bevel pad;

[0017] The pawl unit expands outwards to fit the inside of the composite material thin-walled circular tube under the oblique force of the front bevel pad and the rear bevel pad, and the composite material thin-walled circular tube is fixed under the friction force of the pawl unit.

[0018] Preferably, the contact surfaces of the front bevel pad, the rear bevel pad and the pawl unit are configured as inclined surfaces.

[0019] Preferably, the contact surfaces between the pawl unit and the front bevel pad and the rear bevel pad are configured as inclined surfaces.

[0020] Preferably, the pawl unit is provided with a groove, and the annular spring is embedded in the groove.

[0021] Preferably, the number of the pawls in the pawl unit is 3, which are used to be evenly distributed in the inner wall of the composite material thin-walled circular tube.

[0022] Preferably, the tightening screw passes through the front bevel pad and is connected to the rear bevel pad.

[0023] Preferably, the support assembly is connected to the motor assembly, and the support assembly obtains rotational motion through a transmission mechanism of the motor assembly.

[0024] Preferably, the grinding assembly includes a grinding material unit and a grinding support unit, the grinding material unit is fixed on the grinding support unit, and the grinding support unit is rotatably connected to the motor assembly, and the grinding support unit is rotated so that the grinding material unit contacts the surface of the composite material thin-walled circular tube.

[0025] Preferably, the polishing support unit is connected to the motor assembly via a hinge.

[0026] The present invention also provides a method for polishing the surface of a composite thin-walled circular tube, using any of the above-mentioned composite thin-walled circular tube surface polishing devices, comprising:

[0027] Step 1: axially sleeve the composite thin-walled circular tube onto the outer periphery of the support assembly;

[0028] Step 2: The front bevel pad and the rear bevel pad are pulled closer together by tightening the screws. The ratchet unit expands outwards to fit inside the composite thin-walled circular tube under the oblique force of the front bevel pad and the rear bevel pad. The composite thin-walled circular tube is fixed by the friction force of the ratchet unit.

[0029] Step 3: the motor assembly drives the support assembly and the composite thin-walled circular tube fixed thereto to rotate synchronously around its own axis;

[0030] Step 4: The polishing component is close to the surface of the composite material thin-walled circular tube and polishes the surface of the composite material thin-walled circular tube;

[0031] Step 5. After the grinding operation is completed, turn off the motor assembly to stop the rotation of the support assembly and the composite thin-walled circular tube fixed thereto; loosen the tightening screw, and the front beveled pad and the rear beveled pad move away from each other axially under the restoring force of the pawl unit, and the pawl unit contracts radially under the restoring force of the annular spring and breaks contact with the inner wall of the composite thin-walled circular tube; finally, remove the composite thin-walled circular tube from the support assembly axially.

[0032] Compared with the prior art, the present invention has the following beneficial effects:

[0033] 1. The present invention can effectively support the inner wall of the composite material thin-walled circular tube through the composite material thin-walled circular tube surface grinding device, stably clamp the composite material thin-walled circular tube, and greatly reduce the damage to the composite material thin-walled circular tube body caused by operations such as grinding; and realize the rapid grinding of the composite material thin-walled circular tube, with high grinding quality consistency, thereby improving product quality.

[0034] 2. The surface grinding device of the composite material thin-walled circular tube of the present invention has a simple and reliable structure, and is convenient for fixing and disassembling the composite material thin-walled circular tube, thereby realizing rapid clamping and disassembly and replacement of the composite material thin-walled circular tube, and improving the grinding efficiency of the device.

[0035] 3. The present invention provides a surface grinding device for thin-walled circular tubes made of composite materials. The device is designed with only one motor component and has no complex electrical structure, which effectively avoids damage to the equipment caused by composite material grinding dust. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Other features, objects and advantages of the present invention will become more apparent upon reading the detailed description of non-limiting embodiments with reference to the following drawings:

[0037] Figure 1 This is a schematic diagram of the structure of a surface grinding device for composite thin-walled circular tubes;

[0038] Figure 2 is a structural diagram of the support assembly;

[0039] Figure 3 Schematic diagram of the structure of the pawl.

[0040] The figure shows:

[0041] Support assembly 1, tightening screw 10, rear bevel pad 14

[0042] Grinding assembly 2 front bevel pad 11 groove 121

[0043] Motor assembly 3, pawl unit 12, abrasive unit 21

[0044] Base 4 Ring spring 13 Grinding support unit 22 DETAILED DESCRIPTION

[0045] The present invention will be described in detail below with reference to specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but are not intended to limit the present invention in any form. It should be noted that, for those skilled in the art, several changes and improvements can be made without departing from the scope of the present invention. These all fall within the scope of protection of the present invention.

[0046] This embodiment provides a composite material thin-walled tube surface grinding device, such as Figure 1 As shown, it includes a support component 1, a grinding component 2, a motor component 3 and a base 4.

[0047] Support assembly 1, polishing assembly 2, and motor assembly 3 are mounted on base 4. Support assembly 1 is used to secure a thin-walled composite material tube. Polishing assembly 2 is used to polish the surface of the thin-walled composite material tube. Motor assembly 3 is used to drive support assembly 1 to rotate.

[0048] The support assembly 1 includes a tensioning screw 10, a front bevel pad 11, a pawl unit 12, an annular spring 13, and a rear bevel pad 14. The front bevel pad 11 and the rear bevel pad 14 are arranged on both sides of the pawl unit 12; the tensioning screw 10 is used to pull the front bevel pad 11 and the rear bevel pad 14 closer together; the annular spring 13 is used to provide a uniform circumferential preload to ensure that the pawl unit 12 is synchronously attached to the front bevel pad 11 and the rear bevel pad 14.

[0049] The ratchet unit 12 expands outwards to fit the inside of the composite thin-walled circular tube under the oblique force of the front beveled pad 11 and the rear beveled pad 14 , and the composite thin-walled circular tube is fixed under the friction force of the ratchet unit 12 .

[0050] In one embodiment, the contact surfaces between the front beveled pad 11 , the rear beveled pad 14 and the pawl unit 12 are configured as inclined surfaces.

[0051] In one embodiment, the contact surfaces between the pawl unit 12 and the front bevel pad 11 and the rear bevel pad 14 are configured as inclined surfaces.

[0052] In one embodiment, the pawl unit 12 is provided with a groove 121 , and the annular spring 13 is embedded in the groove 121 .

[0053] In one embodiment, the number of the pawls in the pawl unit 12 is three, which are used to be evenly distributed on the inner wall of the composite material thin-walled circular tube.

[0054] In one embodiment, the tightening screw 10 passes through the front beveled spacer 11 and is connected to the rear beveled spacer 14 .

[0055] In one embodiment, the support assembly 1 is connected to the motor assembly 3 , and the support assembly 1 obtains rotational motion through the transmission mechanism of the motor assembly 3 .

[0056] In one embodiment, the grinding assembly 2 includes a grinding material unit 21 and a grinding support unit 22. The grinding material unit 21 is fixed on the grinding support unit 22. The grinding support unit 22 is rotatably connected to the motor assembly 3. The grinding support unit 22 is rotated so that the grinding material unit 22 contacts the surface of the composite material thin-walled circular tube.

[0057] In one embodiment, the sanding support unit 22 is connected to the motor assembly 3 via a hinge.

[0058] The embodiment also provides a composite thin-walled pipe surface polishing method, which uses the composite thin-walled pipe surface polishing device and specifically comprises the following steps:

[0059] Step 1: the composite thin-walled pipe is axially sleeved on the outer periphery of the support assembly 1; a gap is reserved between the inner wall of the composite thin-walled pipe and the outer side wall of the pawl unit 12 for the outward expansion of the pawl unit 12.

[0060] Step 2: the front beveled pad 11 and the rear beveled pad 14 are pulled close through the tensioning screw 10, the pawl unit 12 is forced to expand outward against the initial pre-tightening force of the annular spring 13 through the outward pushing force, until the outer side wall of the pawl unit 12 is tightly attached to the inner wall of the composite thin-walled pipe, and the radial positioning and fixing of the composite thin-walled pipe on the support assembly 1 are realized;

[0061] Step 3: the motor assembly 3 in transmission connection with the support assembly 1 is started, the motor assembly 3 is used to drive the support assembly 1 and the fixed composite thin-walled pipe to synchronously rotate around the axis thereof, and the rotation speed is set according to the material quality of the composite thin-walled pipe and polishing requirements;

[0062] Step 4: the polishing assembly 2 is composed of the polishing material unit 21 installed on the polishing support unit 22, and the polishing material unit 21 is rotated through the motor hinge to press the surface of the composite thin-walled pipe, so that the circumferential uniform polishing of the outer surface of the thin-walled pipe is realized;

[0063] Step 5: after the polishing operation is completed, the motor assembly 3 is turned off, the support assembly 1 and the composite thin-walled pipe stop rotating, the tensioning screw 10 is loosened, the front beveled pad 11 and the rear beveled pad 14 are relatively far away from each other along the axis under the action of the restoring force of the pawl unit 12, the radial pushing force of the pawl unit 12 disappears, the pawl unit 12 is radially contracted under the action of the restoring force of the annular spring 13, and the inner wall of the composite thin-walled pipe is separated from the pawl unit 12; finally, the composite thin-walled pipe is taken off from the support assembly along the axis.

[0064] The device realizes the rapid positioning and release of the pipe through the controllable expansion of the support assembly 1, realizes the efficient and high-precision polishing of the outer surface of the composite thin-walled pipe through the automatic rotation and pressure-controllable polishing action, greatly reduces the support and polishing damage of the composite thin-walled pipe, has high polishing quality consistency, and improves the product quality.

[0065] In the description of this application, it should be understood that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0066] The above describes specific embodiments of the present invention. It should be understood that the present invention is not limited to the specific embodiments described above, and those skilled in the art may make various changes or modifications within the scope of the claims, which do not affect the essence of the present invention. The embodiments of this application and the features in the embodiments may be combined with each other in any manner unless there is a conflict.

Claims

1. A surface polishing device for thin-walled round tubes of composite materials, characterized in that: It comprises a support assembly (1), a grinding assembly (2), a motor assembly (3) and a base (4); The support assembly (1), the grinding assembly (2) and the motor assembly (3) are mounted on the base (4); The support assembly (1) is used to fix the composite material thin-walled circular tube; The polishing assembly (2) is used to polish the surface of the composite material thin-walled circular tube; The motor assembly (3) is used to drive the support assembly (1) to rotate; Wherein, the support assembly (1) comprises a tightening screw (10), a front bevel pad (11), a pawl unit (12), an annular spring (13), and a rear bevel pad (14); The front bevel pad (11) and the rear bevel pad (14) are arranged on both sides of the pawl unit (12); The tightening screw (10) is used to pull the front bevel pad (11) and the rear bevel pad (14) closer together; The annular spring (13) is used to provide a uniform axial preload force to ensure that the pawl unit (12) is synchronously fitted with the front bevel pad (11) and the rear bevel pad (14); The ratchet unit (12) expands outwards to fit the interior of the composite material thin-walled circular tube under the oblique force of the front beveled pad (11) and the rear beveled pad (14), and the composite material thin-walled circular tube is fixed under the friction force of the ratchet unit (12).

2. The surface grinding device for composite thin-walled circular tubes according to claim 1, characterized in that: The contact surfaces of the front bevel pad (11), the rear bevel pad (14) and the pawl unit (12) are configured as inclined surfaces.

3. The surface grinding device for composite thin-walled circular tubes according to claim 1, characterized in that: The contact surfaces of the ratchet unit (12) and the front bevel pad (11) and the rear bevel pad (14) are configured as inclined surfaces.

4. The surface grinding device for composite thin-walled circular tubes according to claim 1, characterized in that: The ratchet unit (12) is provided with a groove (121), and the annular spring (13) is embedded in the groove (121).

5. The surface grinding device for composite thin-walled circular tubes according to claim 1, characterized in that: The number of the pawls in the pawl unit (12) is 3, and they are used to be evenly distributed in the inner wall of the composite material thin-walled circular tube.

6. The surface grinding device for composite thin-walled circular tubes according to claim 1, characterized in that: The tightening screw (10) passes through the front bevel pad (11) and is connected to the rear bevel pad (14).

7. The surface grinding device for composite thin-walled circular tubes according to claim 1, characterized in that: The support assembly (1) is connected to the motor assembly (3), and the support assembly (1) obtains rotational motion through the transmission mechanism of the motor assembly (3).

8. The surface grinding device for composite thin-walled circular tubes according to claim 1, characterized in that: The grinding assembly (2) comprises a grinding material unit (21) and a grinding support unit (22); the grinding material unit (21) is fixed on the grinding support unit (22); the grinding support unit (22) is rotatably connected to the motor assembly (3); and the grinding support unit (22) is rotated so that the grinding material unit (22) contacts the surface of the composite material thin-walled circular tube.

9. The surface grinding device for composite thin-walled circular tubes according to claim 8, characterized in that: The polishing support unit (22) is connected to the motor assembly (3) via a hinge.

10. A method for polishing the surface of a composite thin-walled circular tube, using the composite thin-walled circular tube surface polishing device according to any one of claims 1 to 9, characterized in that: include: Step 1: axially sleeve the composite thin-walled circular tube onto the outer periphery of the support assembly (1); Step 2, by tightening the screw (10), the front bevel pad (11) and the rear bevel pad (14) are pulled closer together, and the pawl unit (12) expands outwards to fit the interior of the composite material thin-walled circular tube under the oblique force of the front bevel pad (11) and the rear bevel pad (14), and the composite material thin-walled circular tube is fixed under the friction force of the pawl unit (12); Step 3, the motor assembly (3) drives the support assembly (1) and the composite thin-walled circular tube fixed thereto to rotate synchronously around its own axis; Step 4, the polishing component (2) is close to the surface of the composite material thin-walled circular tube, and polishes the surface of the composite material thin-walled circular tube; Step 5, after the grinding operation is completed, the motor assembly (3) is turned off to stop the rotation of the support assembly (1) and the composite thin-walled circular tube fixed thereto; the tightening screw (10) is loosened, and the front bevel pad (11) and the rear bevel pad (14) are relatively separated in the axial direction under the restoring force of the pawl unit (12); the pawl unit (12) is radially contracted under the restoring force of the annular spring (13) and is disengaged from the inner wall of the composite thin-walled circular tube; finally, the composite thin-walled circular tube is removed from the support assembly (1) in the axial direction.

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