A special tool for measuring defects in a curved coating

Abstract

A specialized tool for measuring defects in curved coatings includes a folding ruler, a grid measuring card, a crack scale card, and a graphic template measuring card. All three are non-stretchable, non-deformable, soft, transparent materials, and are bound together via a binding hole on one edge. The folding ruler consists of several sets of folding ruler units, with adjacent sets hinged together, forming a closed graphic. The grid measuring card has several sets of 1cm grid markings. The crack scale card has distance markings of different lengths. The graphic template measuring card has several sets of graphic template markings of different shapes and sizes. This invention solves the problem of accurately measuring detailed data such as the size, angle, and morphological characteristics of defects in curved coatings on aircraft bodies through these technical means.

Description

Technical Field

[0001] This utility model relates to the field of testing and measurement technology, specifically a special tool for measuring defects in curved surface coatings. Background Technology

[0002] Repairing defects in aircraft surface coatings requires specific construction environments and has a long repair cycle. Therefore, it is necessary to first measure and record the size and shape of the coating defects, and then use analytical methods such as visual positioning and computational simulation, combined with construction conditions and subsequent operational requirements, to assess the degree of coating defects and their impact on performance, thereby determining the maintenance and repair methods for the coating. However, current measurements of aircraft surface coating defects rely solely on visual inspection or rough measurements using a measuring tape, lacking appropriate measuring tools. This is especially true for coatings applied to curved surfaces of the aircraft fuselage, where it is difficult to accurately measure the specific dimensions, angles, and morphological characteristics of the defect area. This lack of data provides unreliable support for subsequent computational simulations, visual positioning, and other analytical work, thus failing to meet the requirements for coating defect assessment. Utility Model Content

[0003] This utility model provides a special tool for measuring defects in curved surface coatings. It aims to solve the problem of the difficulty in accurately measuring detailed data such as the size, angle, and morphological characteristics of defects in curved surface coatings of aircraft bodies by using a combination of a folding ruler, grid measuring card, graphic template measuring card, and crack ruler card.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0005] A specialized tool for measuring defects in curved coatings includes a folding ruler, a grid measuring card, a crack scale card, and a graphic template measuring card. The folding ruler, grid measuring card, crack scale card, and graphic template measuring card are all non-stretchable, non-deformable, soft, transparent materials, and are bound together through a binding hole on one edge.

[0006] The folding ruler is composed of several sets of folding ruler units. Adjacent sets of folding ruler units are hinged together, and multiple sets of folding ruler units can be enclosed into a closed shape.

[0007] The grid measuring card has several sets of grid markings, each set of grid markings has a side length of 1cm;

[0008] The crack scale card has distance markings of different lengths;

[0009] The graphic template measurement card is equipped with several sets of graphic template labels of different shapes and sizes.

[0010] The aforementioned specialized tool for measuring defects in curved coatings includes a length measuring section, an angle measuring section, and a screw assembly in each set of folding ruler units. The length measuring section is a strip ruler with dimensional graduations on both sides and an elongated hole along its central axis. The angle measuring section is a circular angle measuring plate with angle graduations on its edges and is hinged to the strip ruler via a screw assembly that passes through its central hole and the elongated hole of the length measuring section. The screw assembly also passes through the elongated hole of the length measuring section of the adjacent folding ruler unit.

[0011] The aforementioned special tool for measuring defects in curved coatings has an extension surface on one side of the length measuring section of its uppermost or lowermost set of folding ruler units, and folding ruler mounting holes are provided on the extension surface.

[0012] The aforementioned special tool for measuring defects in curved coatings includes a graphic template measuring card comprising a circular template measuring card and an elliptical template measuring card. The circular template measuring card has several sets of circular markings of different sizes, and the elliptical template measuring card has several sets of elliptical markings of different sizes.

[0013] The aforementioned specialized tool for measuring defects in curved coatings comprises a folding ruler, a grid measuring card, a crack ruler card, and a graphic template measuring card, which are bound together by elastic opening and closing snap rings passing through their binding holes.

[0014] The aforementioned special tools for measuring defects in curved coatings, including the folding ruler, grid measuring card, crack ruler card, and graphic template measuring card, have their non-bound edges staggered from top to bottom after being bound together, with the names of each part marked in the staggered area.

[0015] This invention provides a specialized tool for measuring defects in curved surface coatings. It can be used to measure various types of coating defects on aircraft bodies, particularly for area-type defects such as localized peeling and bulging that are complex in shape and located in areas difficult to measure directly. Multiple folding ruler units can be used to enclose the defect area, and then the length and angle of the enclosed area's edges can be read and recorded segment by segment. The folding ruler, grid measuring card, crack ruler card, and graphic template measuring card in this invention are all non-stretchable, non-deformable, soft, and transparent, thus conforming well to the curved surface and ensuring the reliability of the measurement results. The folding ruler, grid measuring card, crack ruler card, and graphic template measuring card are bound together by binding holes on one edge, with the non-binding edges staggered from top to bottom. The names of each part are marked in the staggered areas, making them easier to store and use. In summary, this invention provides detailed data support for coating defect assessment and subsequent visual positioning, computational simulation, and other analytical work, solving the problem of accurately measuring detailed data such as the size, angle, and morphological characteristics of coating defects on curved aircraft bodies. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the various parts of this utility model after binding;

[0017] Figure 2 This is a schematic diagram of a folding ruler structure;

[0018] Figure 3 This is a schematic diagram of the length measuring section in a set of folding ruler units;

[0019] Figure 4 This is a schematic diagram of the angle measuring section in a set of folding ruler units;

[0020] Figure 5 This is a schematic diagram of the connection structure between two adjacent sets of folding ruler units;

[0021] Figure 6 It is a schematic diagram of a closed graphic formed by several sets of folding ruler units;

[0022] Figure 7 This is a schematic diagram of a grid measurement card;

[0023] Figure 8 This is a schematic diagram of a crack scale card;

[0024] Figure 9 This is a schematic diagram of an elliptical template measurement card;

[0025] Figure 10 This is a schematic diagram of a circular template measuring card.

[0026] Explanation of each label in the diagram:

[0027] 1 is a folding ruler, 1-1 is a length measuring part, 1-1-1 is a long hole, 1-2 is an angle measuring part, 1-3 is a screw assembly, 1-4 is an extension surface, and 1-5 is a folding ruler binding hole;

[0028] 2 is the grid measuring card, 2-1 is the grid marking, and 2-2 is the binding hole for the grid measuring card;

[0029] 3 is the crack scale card, 3-1 is the distance mark, and 3-2 is the binding hole for the crack scale card;

[0030] 4 is an elliptical template measuring card, 4-1 is an elliptical mark, and 4-2 is a binding hole for the elliptical template measuring card;

[0031] 5 represents a circular template measuring card, 5-1 represents a circular marker, and 5-2 represents a binding hole for the circular template measuring card.

[0032] 6 is a flexible opening and closing buckle. Detailed Implementation

[0033] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0034] Referring to Figure 1, this utility model provides a special tool for measuring defects in curved coatings, including a folding ruler 1, a grid measuring card 2, a crack ruler card 3, a circular template measuring card 5, and an elliptical template measuring card 4. The folding ruler 1, grid measuring card 2, crack ruler card 3, circular template measuring card 5, and elliptical template measuring card 4 are all non-stretchable and non-deformable soft transparent bodies. They are fastened together by a binding hole provided on one edge and an elastic opening and closing buckle 6 passing through the binding hole. The non-binding edge is staggered from top to bottom, and the names of each part are marked in the staggered area.

[0035] See Figure 2. Figure 3 , Figure 4 , Figure 5 , Figure 6 The special tool for measuring defects in curved coatings according to this utility model comprises a folding ruler 1 consisting of several sets of folding ruler units. Adjacent sets of folding ruler units are hinged together, and multiple sets of folding ruler units can be enclosed into a closed shape. An extension surface 1-4 is provided on one side of the uppermost or lowermost set of folding ruler units, and folding ruler mounting holes 1-5 are provided on the extension surface 1-4. Each set of folding ruler units is provided with a length measuring part 1-1, an angle measuring part 1-2, and a screw assembly 1-3; the length measuring part 1-1 is a strip-shaped straight... The ruler has size markings on both sides of its edges, with the size markings in cm. It has an elongated hole 1-1-1 along its central axis. The angle measuring part 1-2 is a circular angle measuring plate with angle markings on its edges, with the angle markings in º. The circular angle measuring plate is hinged to the strip ruler by a screw assembly 1-3 that passes through its central hole and the elongated hole 1-1-1 on the length measuring part 1-1. The screw assembly 1-3 also passes through the elongated hole of the length measuring part of the adjacent folding ruler unit.

[0036] See Figure 1 , Figure 7 The special tool for measuring defects in curved coatings described in this utility model has several sets of grid markings 2-1 on its grid measuring card 2. The side length of each set of grid markings 2-1 is 1cm. A grid measuring card binding hole 2-2 is set on one edge of the grid markings 2-1, and the words "grid measuring card" are marked on the other edge opposite to the grid measuring card binding hole 2-2.

[0037] See Figure 1 , Figure 8The special tool for measuring defects in curved coatings described in this utility model has a crack ruler card 3 with distance markings 3-1 of different lengths. The length of the distance markings 3-1 is in cm. A crack ruler card binding hole 3-2 is provided on one side edge of the crack ruler card 3, and the words "crack ruler card" are marked on the other side edge opposite to the crack ruler card binding hole 3-2.

[0038] See Figure 1 , Figure 9 The special tool for measuring defects in curved coatings described in this utility model has an elliptical template measuring card 4 with several sets of elliptical markings 4-1 of different sizes. The major and minor axis dimensions of the ellipse are marked on the side or top of each set of elliptical markings 4-1. The units of the major and minor axis dimensions are mm (millimeters). An elliptical template measuring card binding hole 4-2 is provided on one side edge of the elliptical template measuring card 4-2. The words "elliptical template measuring card" are marked on the other side edge opposite to the elliptical template measuring card 4-2.

[0039] See Figure 1 , Figure 10 The special tool for measuring defects in curved coatings described in this utility model has a circular template measuring card 5 with several sets of circular markings 5-1 of different sizes. The diameter of the circle is marked below or inside each set of circular markings 5-1. The unit of the major axis and minor axis dimensions is mm. A circular template measuring card binding hole 5-2 is provided on one edge of the circular template measuring card 5, and the words "circular template measuring card" are marked on the other edge opposite to the circular template measuring card 5-2.

[0040] See Figures 1 to 10This invention provides a specialized tool for measuring defects in curved coatings. It can be used to measure different types of coating defects on aircraft bodies. For linear defects such as cracks and curling edges, the length of the crack and the length and width of the curling edges can be measured by covering the surface of the crack or curling edge with a grid measuring card 2 and a crack ruler card 3. For area-type defects such as bulges and partial peeling, a graphic template with a shape similar to the defect can be covered on the defect surface to simultaneously measure important dimensions such as the diameter and maximum length of the bulge or partial peeling coating defects. To determine the morphological characteristics of the defects; for area-type defects such as localized detachment and bulging that are complex in shape and located in areas that are not easily measured directly by grid measuring card 2, crack ruler card 3 and graphic template measuring card, the defect area can be enclosed by multiple sets of folding ruler units of folding ruler 1, and then the edge length and angle values ​​of the enclosed area can be read and recorded in segments. During this process, screw assembly 1-3 and angle measuring part 1-2 can slide along the long hole 1-1-1 on the length measuring part 1-1, while the two adjacent sets of folding ruler units rotate relative to each other to match the edge curve of the defect area to the maximum extent and ensure the accuracy of the measurement results.

Claims

1. A special tool for measuring defects in a curved coating, characterized by: It includes a folding ruler (1), a grid measuring card (2), a crack ruler card (3), and a graphic template measuring card. The folding ruler (1), grid measuring card (2), crack ruler card (3), and graphic template measuring card are all non-stretchable, non-deformable, soft, transparent bodies, and are bound together through binding holes provided on one edge. The folding ruler (1) is composed of several sets of folding ruler units. Two adjacent sets of folding ruler units are hinged together and assembled. Multiple sets of folding ruler units can be enclosed into a closed shape. The grid measuring card (2) has several sets of grid markings (2-1), and the side length of each set of grid markings (2-1) is 1cm; The crack scale card (3) is marked with distance markers (3-1) of different lengths. The graphic template measurement card is equipped with several sets of graphic template labels of different shapes and sizes.

2. The special tool for measuring defects in curved surface coatings according to claim 1, characterized in that: Each set of folding ruler units is provided with a length measuring part (1-1), an angle measuring part (1-2), and a screw assembly (1-3); the length measuring part (1-1) is a strip ruler with size scales on both sides and an elongated hole (1-1-1) along its length direction central axis; the angle measuring part (1-2) is a circular angle measuring plate with angle scales on its edge, and is hinged to the strip ruler by a screw assembly (1-3) passing through its central hole and the elongated hole (1-1-1) on the length measuring part (1-1); the screw assembly (1-3) also passes through the elongated hole of the length measuring part of the adjacent folding ruler unit.

3. The special tool for measuring defects in curved surface coatings according to claim 2, characterized in that: The folding ruler (1) has an extension surface (1-4) on one side of the length measuring part (1-1) of its uppermost or lowermost set of folding ruler units, and a folding ruler mounting hole (1-5) is provided on the extension surface (1-4).

4. The special tool for measuring defects in curved surface coatings according to claim 3, characterized in that: The graphic template measuring card includes a circular template measuring card (5) and an elliptical template measuring card (4). Several sets of circular marks (5-1) of different sizes are set on the circular template measuring card (5), and several sets of elliptical marks (4-1) of different sizes are set on the elliptical template measuring card (4).

5. The special tool for measuring defects in curved surface coatings according to claim 3, characterized in that: The folding ruler (1), grid measuring card (2), crack ruler card (3) and graphic template measuring card are bound together by elastic opening and closing buckles (6) passing through their binding holes.

6. The special tool for measuring defects in curved surface coatings according to claim 5, characterized in that: After the folding ruler (1), grid measuring card (2), crack ruler card (3) and graphic template measuring card are bound together, their non-bound edges are staggered from top to bottom, and the names of each part are marked in the staggered area.

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