Counter bore detection measuring tool

Abstract

The utility model provides a measuring tool for detecting a counter bore, and relates to the technical field of workpiece measurement, the measuring tool comprises a hexagonal handle, a first measuring head and a second measuring head, the first measuring head and the second measuring head are arranged at two ends of the hexagonal handle, the second measuring head is provided with an angle observation surface, and the first measuring head is used for measuring the maximum diameter of the counter bore and the counter bore. And the second measuring head is used for measuring the minimum diameter and the angle of the counter bore. According to the measuring tool for detecting the counter bore, the conformity measurement of the hole diameter and angle of the 90-degree counter bore of a machined part is quickly realized, the difficulty of an original measuring method is reduced, and the detection efficiency is powerfully guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of workpiece measurement, in particular to a countersink detection and measuring tool. Background Art

[0002] The use of countersunk screws is commonplace in the assembly of aircraft computer chassis components. Components such as cover plates are often equipped with 90° countersunk holes of varying diameters for the installation of these screws. Existing inspection technology for these 90° countersunk holes typically utilizes coordinate measuring machines (CMMs), a cumbersome and labor-intensive process. Minor discrepancies in the size and angle tolerances of these 90° countersunk holes can lead to various defects in product installation reliability. Summary of the Invention

[0003] The purpose of this application is to provide a countersink detection and measuring tool, which is mainly used to measure 90° countersinks, solving the problem of difficulty in measuring 90° countersinks in the prior art.

[0004] In order to achieve the above-mentioned purpose, the utility model adopts the following technical solution: a countersink detection measuring tool, which includes a hexagonal handle, a first measuring head and a second measuring head arranged at both ends of the hexagonal handle, the second measuring head is provided with an angle observation surface, the first measuring head is used to measure the maximum diameter and countersink of the countersink, and the second measuring head is used to measure the minimum diameter and countersink angle of the countersink.

[0005] The countersink detection measuring tool provided by the present invention also has the following technical features: the first measuring head includes a first connecting piece for extending into the countersink and a first measuring piece for measurement arranged at the end of the first connecting piece; the diameter of the first connecting piece is smaller than the diameter of the countersink; the first measuring piece is a conical structure; and the angle of the conical structure is 90°.

[0006] The countersink detection measuring tool provided by the present invention also has the following technical features: the second measuring head includes a second connecting piece for extending into the countersink and a second measuring piece for measurement arranged at the end of the second connecting piece; the diameter of the second connecting piece is smaller than the diameter of the countersink; one side of the second measuring piece is flat and the other side is conical; the flat structure is an angle observation surface; and the conical structure is used to measure the minimum diameter and angle of the countersink.

[0007] The countersink detection measuring tool provided by the present invention also has the following technical features: the maximum diameter D1 of the measuring end of the first measuring head is:

[0008]

[0009] Among them, D2 is the minimum diameter of the countersink to be measured, △D is the diameter tolerance of the countersink to be measured, and T is the machining tolerance of the measuring tool.

[0010] The countersink detection measuring tool provided by the present invention also has the following technical features: the maximum diameter D3 of the measuring end of the second measuring head is:

[0011]

[0012] Wherein, D1 is the maximum diameter of the measuring end of the first measuring head, ΔD is the diameter tolerance of the countersink to be measured, T is the machining tolerance of the measuring tool, and α is the half angle of the countersink to be measured.

[0013] The countersink detection measuring tool provided by the present invention also has the following technical feature: the surface roughness of the first measuring head and the second measuring head is Ra0.06 μm.

[0014] Beneficial effects

[0015] The countersink detection and measuring tool provided by the utility model can quickly realize the conformity measurement of the 90° countersink aperture and angle of machined parts, reduce the difficulty of the original measurement method, and effectively ensure the detection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0017] Figure 1 This is a schematic diagram of the structure of the measuring tool provided by the utility model.

[0018] Figure 2 This is a schematic structural diagram of another perspective of the measuring tool provided by the utility model.

[0019] Among them, 1: first measuring head; 2: hexagonal handle; 3: second measuring head; 4: second measuring piece. DETAILED DESCRIPTION

[0020] The present application is further described in detail below with reference to the accompanying drawings and examples. However, it should be noted that these embodiments are not limitations of the present application, and any equivalent transformations or substitutions in functions, methods, or structures made by ordinary technicians in this field based on these embodiments are within the scope of protection of the present application.

[0021] In the description of the embodiments of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "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 the creation of the present 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 the creation of the present application.

[0022] Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature identified with "first," "second," etc., may explicitly or implicitly include one or more of the features. In the description of the inventions of this application, unless otherwise specified, "plurality" means two or more.

[0023] The terms "mounted," "connected," and "connected" should be understood broadly. For example, they can refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. A person of ordinary skill in the art will understand the specific meanings of these terms in the context of this application based on specific circumstances.

[0024] like Figure 1-2 As shown, an embodiment of the present application provides a countersink detection measuring tool, which includes a hexagonal handle 2, a first measuring head 1 and a second measuring head 3 arranged at both ends of the hexagonal handle 2, the second measuring head 3 is provided with an angle observation surface, the first measuring head 1 is used to measure the maximum diameter and countersink of the countersink, and the second measuring head 3 is used to measure the minimum diameter and countersink angle of the countersink.

[0025] In some embodiments, the first measuring head 1 includes a first connecting member for extending into the countersunk hole and a first measuring member for measuring arranged at the end of the first connecting member. The diameter of the first connecting member is smaller than the diameter of the countersunk hole. The first measuring member is a conical structure with an angle of 90°.

[0026] In some embodiments, the second measuring head 3 includes a second connecting member for extending into the countersink and a second measuring member 4 for measurement arranged at the end of the second connecting member. The diameter of the second connecting member is smaller than the diameter of the countersink. One side of the second measuring member 4 is flat and the other side is conical. The flat structure is an angle observation surface, and the conical structure is used to measure the minimum diameter and angle of the countersink.

[0027] In some embodiments, the maximum diameter D1 of the measuring end of the first measuring head 1 is:

[0028]

[0029] Where D2 is the minimum diameter of the countersink to be measured, ΔD is the diameter tolerance of the countersink to be measured, and T is the machining tolerance of the measuring tool. The value of ΔD is H10 according to GB / T1957-2006.

[0030] In some embodiments, the maximum diameter D3 of the measuring end of the second measuring head 3 is:

[0031]

[0032] Wherein, D1 is the maximum diameter of the measuring end of the first measuring head, ΔD is the diameter tolerance of the countersink to be measured, T is the machining tolerance of the measuring tool, and α is the half angle of the countersink to be measured.

[0033] In some embodiments, the surface roughness of the first measuring head 1 and the second measuring head 3 is Ra 0.06 μm. The measuring tool is made of bearing steel GCr15 with a Rockwell hardness of HRC 60-65 to ensure the accuracy of 90° countersunk holes. The surface roughness is used to increase the wear resistance of the measuring tool during use and stabilize its accuracy.

[0034] In some embodiments, during the measurement process, different sizes of the first measuring head, the second measuring head, and the hexagonal handle may be selected according to the diameter of the countersunk hole to be measured. The specific sizes are shown in Table 1:

[0035] Table 1: Measuring tool dimensions

[0036] A value φ3.88 φ4.08 φ5.28 φ5.38 φ6.25 φ6.35 φ8.35 φ9.35 B value φ4.12 φ4.32 φ5.52 φ5.62 φ6.55 φ6.65 φ8.65 φ9.65 C value φ2 φ2 φ2 φ2 φ2 φ2 φ2.5 φ2.5 M 4 4.2 5.4 5.5 6.4 6.5 8.5 9.5

[0037] The method of using the measuring tool provided in any of the above embodiments is as follows:

[0038] When measuring, select a plug gauge of the appropriate specification. First, vertically place the second measuring head into the countersink to be measured. The diameter of the second measuring head 3 should be completely below the countersink surface. Visually inspect the countersink and the taper surface of the measuring tool for close fit. Then, vertically place the first measuring head 1 into the countersink to be measured. The diameter of the first measuring head 1 should be flush with or slightly higher than the countersink surface. If the countersink characteristics meet the above conditions, the machining characteristics of the countersink are considered qualified.

[0039] The above description is merely a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application. The above description is merely a preferred embodiment of the present application. It should be noted that those skilled in the art can make various improvements and variations without departing from the technical principles of the present application, and such improvements and variations shall also be considered within the scope of protection of the present application.

Claims

1. A countersunk hole detection measuring tool, characterized in that: The measuring tool includes a hexagonal handle, a first measuring head and a second measuring head arranged at both ends of the hexagonal handle, the second measuring head is provided with an angle observation surface, the first measuring head is used to measure the maximum diameter and countersink of the countersink, and the second measuring head is used to measure the minimum diameter and countersink angle of the countersink.

2. The countersunk hole detection measuring tool according to claim 1, characterized in that: The first measuring head includes a first connecting piece for extending into the countersunk hole and a first measuring piece arranged at the end of the first connecting piece for measurement. The diameter of the first connecting piece is smaller than the diameter of the countersunk hole. The first measuring piece is a conical structure with an angle of 90°.

3. The countersunk hole detection measuring tool according to claim 1, characterized in that: The second measuring head includes a second connecting piece for extending into the countersink and a second measuring piece for measurement arranged at the end of the second connecting piece. The diameter of the second connecting piece is smaller than the diameter of the countersink. One side of the second measuring piece is flat and the other side is conical. The flat structure is an angle observation surface, and the conical structure is used to measure the minimum diameter and angle of the countersink.

4. The countersunk hole detection measuring tool according to claim 1, characterized in that: The maximum diameter D1 of the measuring end of the first measuring head is: Among them, D2 is the minimum diameter of the countersink to be measured, △D is the diameter tolerance of the countersink to be measured, and T is the machining tolerance of the measuring tool.

5. The countersunk hole detection measuring tool according to claim 1, characterized in that: The maximum diameter D3 of the measuring end of the second measuring head is: Wherein, D1 is the maximum diameter of the measuring end of the first measuring head, ΔD is the diameter tolerance of the countersink to be measured, T is the machining tolerance of the measuring tool, and α is the half angle of the countersink to be measured.

6. The countersink detection measuring tool according to claim 1, characterized in that: The surface roughness of the first measuring head and the second measuring head is Ra 0.06 μm.

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