Round finishing tool for resin-based wave-absorbing coating
By designing a rounding finishing fixture for resin-based microwave absorbing coatings, and utilizing the cooperation between the inverted trapezoidal cutter head and the limiting cylinder, the problems of uneven coating transition and accidental damage were solved, achieving uniform coating transition and aesthetic finishing.
Patent Information
- Application Number
- CN202520139665.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-21
- Publication Date
- 2026-02-17
- Estimated Expiration
- 2035-01-21
AI Technical Summary
Existing technologies make it difficult to achieve a uniform transition of the coating from the surface to the substrate in resin-based microwave absorbing coatings, especially near circular holes, and can easily cause accidental damage to untrimmed areas.
Design a rounding tool for resin-based microwave absorbing coatings, including a handle, an annular multi-bladed cutter head and a limiting cylinder. The annular multi-bladed cutter head is fixed on the limiting cylinder, and the inverted trapezoidal cutter head ensures matching with the circular hole to achieve a uniform transition and regular edge of the coating.
It achieves a uniform transition of the coating from the original coating thickness to the substrate, and the edge of the coating after trimming is a regular circle, avoiding accidental damage to the non-trimmed area. The operation is simple and efficient.
Smart Images
Figure CN223915855U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of coating finishing technology, specifically relating to a rounding finishing tool for resin-based microwave absorbing coatings. Background Technology
[0002] Radar absorbing coatings can be classified into resin-based and ceramic-based coatings according to their temperature resistance. Resin-based coatings, due to their high adhesion, high flexibility, and good application adaptability, are widely used on fuselage surfaces and high-temperature areas of engines. In practical applications, some components have circular holes such as screw holes, locking pin holes, and weld vent holes at installation and connection points. To prevent damage to the coating near these holes during installation and to ensure better stress release under severe vibration, after applying the absorbing coating to these components, workers will trim the coating near the holes. The trimming method involves gradually thinning the coating using grinding or cutting tools until the coating thickness near the holes seamlessly transitions from the original surface coating thickness to the substrate. Currently, although many grinding and cutting tools are available, when the coating thickness is ≤0.5mm, it is difficult to achieve a uniform transition from the surface to the substrate using these tools. This makes it difficult to trim the coating into a regular circle, and it is easy to accidentally damage the coating in untrimmed areas during the trimming process.
[0003] In view of this, this utility model is hereby proposed. Utility Model Content
[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a rounding tool for resin-based microwave absorbing coatings. This tool rounds the microwave absorbing coating at the circular holes of parts, achieving a uniform transition of the microwave absorbing coating from the original coating thickness to the substrate, as well as the integrity and aesthetics of the parts after the rounding. The rounding operation is simple and efficient.
[0005] The objective of this utility model is achieved through the following technical solution:
[0006] This utility model provides a rounding trimming tool for resin-based microwave absorbing coatings, used to trim the coating around a round hole to be trimmed on a substrate. It includes a handle, an annular multi-bladed cutter head, and a limiting cylinder matching the diameter of the round hole to be trimmed. The annular multi-bladed cutter head is fixedly sleeved on the limiting cylinder. The annular multi-bladed cutter head includes several inverted trapezoidal cutter heads evenly distributed circumferentially along the outer surface of the limiting cylinder. The upper end of the limiting cylinder is fixedly connected to the handle, and the lower end is inserted into the interior of the round hole to be trimmed.
[0007] Preferably, the inverted trapezoidal cutter head has an upwardly protruding arcuate upper surface, a downwardly protruding arcuate lower surface, and an intermediate surface connected to the upper and lower surfaces. The lower surface includes a downwardly protruding inverted trapezoidal arcuate surface and a plane parallel to the cross-section of the limiting cylinder. The upper surface and the plane are both fixedly connected to the outer surface of the limiting cylinder. Cutting edges are provided on the left and right sides of the inverted trapezoidal arcuate surface.
[0008] Furthermore, the length between the outer edge of the plane away from the limiting cylinder and the center of the modified circular hole is equal to the length between the center of the modified circular hole and the outer edge of the annular substrate without the microwave absorbing coating.
[0009] Furthermore, the length between the connection point of the plane and the limiting cylinder and the lower surface of the limiting cylinder is equal to the depth of the modified circular hole.
[0010] Furthermore, the handle is a T-shaped handle.
[0011] Furthermore, the vertical centerlines of the T-shaped handle, the annular multi-bladed cutter head, and the limiting cylinder coincide.
[0012] Furthermore, the handle, the annular multi-bladed cutter head, and the limiting cylinder are all made of cemented carbide.
[0013] Furthermore, the limiting cylinder is fixedly connected to the handle and the annular multi-bladed cutter head by welding.
[0014] Furthermore, when the diameter d of the hole to be trimmed is less than 20 mm, the number of the inverted trapezoidal cutter heads is N = 3; when the diameter of the hole to be trimmed is 20 mm ≤ d ≤ 30 mm, the number of the inverted trapezoidal cutter heads is N = 4; when the diameter of the hole to be trimmed is greater than 30 mm, the number of the inverted trapezoidal cutter heads is N = 5.
[0015] Compared with the prior art, the present invention has the following beneficial effects:
[0016] Firstly, this utility model provides a rounding trimming fixture for resin-based microwave absorbing coatings. The diameter of the limiting cylinder matches the diameter of the round hole to be trimmed, and the lower surface of the annular multi-bladed cutter head can precisely fit onto the round hole, overcoming the problem of accidental damage to the coating in non-trimmed areas when there is no positioning. This achieves a regular circular edge on the trimmed coating. At the same time, the shape of the cutter head is an inverted trapezoid, which overcomes the problem of uneven transition from the original coating thickness to the substrate. It is especially effective for rounding trimming thin coatings, and the trimming operation is simple and efficient.
[0017] Secondly, the present invention provides a rounding tool for resin-based microwave absorbing coatings, with a T-shaped handle for easy handling and a large torque input, thereby achieving a labor-saving effect. Attached Figure Description
[0018] The accompanying drawings are incorporated in and form part of this specification, and together with the description, serve to explain the principles of this invention.
[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0020] Figure 1 A schematic diagram of the tooling for rounding and trimming resin-based microwave absorbing coatings provided by this utility model;
[0021] Figure 2 This diagram illustrates the structural relationship between the coated surface, the modified circular holes, and the uncoated annular substrate.
[0022] Figure 3 This is a cross-sectional view of the coating after rounding and finishing process for a resin-based microwave absorbing coating provided by this utility model.
[0023] Wherein: 1-handle; 2-inverted trapezoidal cutter head; 21-upper surface; 22-lower surface; 221-inverted trapezoidal arc surface; 222-plane; 23-middle surface; 3-limiting cylinder; 4-cutting edge; 5-coating; 51-coating upper surface; 52-coating lower surface; 6-the round hole to be trimmed; 7-annular substrate without microwave absorbing coating. Detailed Implementation
[0024] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this invention. Rather, they are merely examples of apparatuses consistent with some aspects of this invention as detailed in the appended claims.
[0025] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments.
[0026] like Figure 1As shown, this utility model provides a rounding trimming tool for resin-based microwave absorbing coatings, used to trim the coating 5 around the round hole 6 to be trimmed on the substrate. It includes a handle 1, an annular multi-bladed cutter head, and a limiting cylinder 3 that matches the diameter of the round hole 6 to be trimmed. The annular multi-bladed cutter head is fixedly sleeved on the limiting cylinder 3. The annular multi-bladed cutter head includes several inverted trapezoidal cutter heads 2 distributed circumferentially along the outer surface of the limiting cylinder 3. The gap between each inverted trapezoidal cutter head 2 is a chip removal groove. The upper end of the limiting cylinder 3 is fixedly connected to the handle 1, and the lower end is inserted into the interior of the round hole 6 to be trimmed.
[0027] According to an embodiment of this utility model, coating 5 is a resin-based microwave absorbing coating. Coating 5 is applied around the annular substrate 7 on the substrate plate that is not coated with the microwave absorbing coating. The structural relationship between coating 5, the annular substrate 7 without the microwave absorbing coating, and the modified circular hole 6 is as follows: Figure 2 As shown, the inverted trapezoidal cutter head 2 overcomes the problem of uneven transition of the coating 5 from the original coating thickness to the uncoated annular substrate 7, and is especially effective in rounding and finishing thin coatings 5.
[0028] According to an embodiment of this utility model, the diameter of the limiting cylinder 3 matches that of the circular hole 6 to be trimmed, thereby ensuring that the limiting cylinder 3 can be inserted precisely into the circular hole 6. During the cutting process, the annular multi-bladed cutter head is positioned above the circular hole 6 to be trimmed, and the limiting cylinder 3 will not wobble left and right within the circular hole 6 to be trimmed, overcoming the problem of accidental damage to the coating 5 in non-trimmed areas when there is no positioning, and also achieving a regular circular edge on the trimmed coating 5.
[0029] According to an embodiment of this utility model, the inverted trapezoidal cutter head 2 has an upwardly protruding arcuate upper surface 21, a downwardly protruding arcuate lower surface 22, and an intermediate surface 23 connected to the upper surface 21 and the lower surface 22. The lower surface 22 includes a downwardly protruding inverted trapezoidal arcuate surface 221 and a plane 222 parallel to the cross-section of the limiting cylinder 3. Specifically, the plane 222 is perpendicular to the cross-section of the limiting cylinder 3. Both the upper surface 21 and the plane 222 are fixedly connected to the outer surface of the limiting cylinder 3. Cutting blades 4 are provided on both the left and right sides of the inverted trapezoidal arcuate surface 221.
[0030] According to an embodiment of the present invention, the length between the outer edge of the plane 222 away from the limiting cylinder 3 and the center of the modified circular hole 6 is equal to the length between the center of the modified circular hole 6 and the outer edge of the uncoated annular substrate 7, thereby enabling the tooling to precisely fit onto the modified circular hole 6, overcoming the problem of accidental damage to the coating in the non-modified area when there is no positioning, and also achieving a regular circular edge on the modified coating.
[0031] According to an embodiment of this utility model, the length between the connection point of the plane 222 and the limiting cylinder 3 and the lower surface of the limiting cylinder 3 is equal to the depth of the circular hole 6 to be trimmed. When using the fixture, press down and rotate the fixture clockwise. Since the lower end of the limiting cylinder 3 is in contact with the bottom of the circular hole 6 to be trimmed, the fixture only rotates in the horizontal direction, thereby limiting the upper and lower displacement of the fixture and better ensuring that the coating in the non-trimmed area is not accidentally damaged.
[0032] According to an embodiment of this utility model, the handle 1 is a T-shaped handle, which is formed by welding two horizontal and vertical cylinders. The upper end of the limiting cylinder 3 is fixedly connected to the vertical cylinder. The length of the horizontal cylinder is 8cm, and the length of the vertical cylinder is 5cm. The design of the handle's shape and size makes it easier for workers to pick up the tooling, and it can provide a large torque input during use, saving workers' cutting force.
[0033] According to an embodiment of the present invention, the center lines of the vertical central axes of the T-shaped handle, the annular multi-bladed cutter head, and the limiting cylinder 3 coincide.
[0034] According to an embodiment of this utility model, the handle 1, the annular multi-blade cutter head, and the limiting cylinder 3 are all made of cemented carbide.
[0035] According to an embodiment of the present invention, the limiting cylinder 3 is fixedly connected to the handle 1 and the annular multi-blade cutter head by welding.
[0036] According to an embodiment of the present invention, when the diameter d of the round hole 6 to be trimmed is less than 20 mm, the number of inverted trapezoidal cutter heads 2 is N = 3; when the diameter of the round hole 6 to be trimmed is 20 mm ≤ d ≤ 30 mm, the number of inverted trapezoidal cutter heads 2 is N = 4; when the diameter of the round hole 6 to be trimmed is greater than 30 mm, the number of inverted trapezoidal cutter heads 2 is N = 5.
[0037] The process of using the rounding and trimming fixture for resin-based microwave absorbing coatings provided by this utility model is as follows:
[0038] Holding the crossbar of the T-shaped handle, insert the lower end of the limiting cylinder 3 into the round hole 6 to be trimmed for positioning. The plane 222 is in contact with the annular substrate 7 without the microwave absorbing coating, and the inverted trapezoidal arc surface 221 is in contact with the coating 5. At this time, the annular multi-bladed cutter head is precisely matched with the round hole 6 to be trimmed. Press down clockwise and rotate the fixture. The cutting edges 4 located on the left and right sides of the inverted trapezoidal arc surface 221 continuously cut the coating 5 until the edge of the coating 5 around the round hole 6 to be trimmed is a regular circle. The cross-sectional view of the trimmed coating 5 is as follows. Figure 3 As shown.
[0039] The above description is merely a specific embodiment of this utility model, enabling those skilled in the art to understand or implement it. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this utility model.
[0040] It should be understood that this utility model is not limited to the content already described above, and various modifications and changes can be made without departing from its scope. The scope of this utility model is limited only by the appended claims.
Claims
1. A rounding finishing tool for a resin-based wave-absorbing coating, for finishing the coating (5) around a finished round hole (6) opened on a substrate, characterized in that, The handle (1), the annular multi-blade cutter head and the limiting cylinder (3) matched with the diameter of the round hole (6) to be trimmed, the annular multi-blade cutter head is fixedly sleeved on the limiting cylinder (3), the annular multi-blade cutter head comprises a plurality of inverted trapezoidal cutter heads (2) distributed circumferentially along the outer surface of the limiting cylinder (3), the upper end of the limiting cylinder (3) is fixedly connected with the handle (1), and the lower end is inserted into the inside of the round hole (6) to be trimmed.
2. The rounded-trim tooling for resin-based wave-absorbing coating of claim 1, wherein, The inverted trapezoidal cutter head (2) has an upwardly convex arc-shaped upper surface (21), a downwardly convex arc-shaped lower surface (22) and an intermediate surface (23) connected with the upper surface (21) and the lower surface (22), the lower surface (22) comprises a downwardly convex inverted trapezoidal arc surface (221) and a plane (222) parallel to the cross section of the limiting cylinder (3), the upper surface (21) and the plane (222) are fixedly connected with the outer surface of the limiting cylinder (3), and the left and right sides of the inverted trapezoidal arc surface (221) are provided with cutter blades (4).
3. The rounded-trim tooling for resin-based wave- absorbing coatings of claim 2, wherein, The length between the outer edge of the limiting cylinder (3) away from the plane (222) to the center of the round hole (6) to be trimmed is equal to the length between the center of the round hole (6) to be trimmed and the outer edge of the annular base material (7) without the wave-absorbing coating.
4. The rounded-trim tooling for resin-based wave-absorbing coating according to claim 2 or 3, characterized in that, The length between the connection of the plane (222) and the lower surface of the limiting cylinder (3) is equal to the depth of the round hole (6) to be trimmed.
5. The rounded-trim tooling for resin-based wave- absorbing coatings of claim 1, wherein, The handle (1) is a T-shaped handle.
6. The rounded-trim tooling for resin-based wave-absorbing coating of claim 5, wherein, The vertical central axes of the T-shaped handle, the annular multi-blade cutter head and the limiting cylinder (3) are coaxial.
7. The rounded-trim tooling for resin-based wave- absorbing coatings of claim 1, wherein, The handle (1), the annular multi-blade cutter head and the limiting cylinder (3) are all made of hard alloy material.
8. The rounded-trim tooling for resin-based wave- absorbing coatings of claim 1, wherein, The limiting cylinder (3) is fixedly connected with the handle (1) and the annular multi-blade cutter head in a welding manner.
9. The rounded-trim tooling for resin-based wave- absorbing coatings of claim 1, wherein, When the diameter d of the round hole (6) to be trimmed is less than 20 mm, the number N of the inverted trapezoidal cutter heads (2) is 3; when the diameter d of the round hole (6) to be trimmed is 20 mm to 30 mm, the number N of the inverted trapezoidal cutter heads (2) is 4; and when the diameter d of the round hole (6) to be trimmed is greater than 30 mm, the number N of the inverted trapezoidal cutter heads (2) is 5.