Threaded fastener testing fixture

Abstract

The utility model belongs to the technical field of threaded fastener detection, and discloses a threaded fastener detection tool. The threaded fastener detection tool comprises a detection main body with an upper detection plane, and the upper detection plane and a lower detection plane are arranged in parallel and keep a preset interval; the inspection main body is provided with a mounting hole, and the mounting hole penetrates through the upper detection plane and the lower detection plane. The installation hole is formed in the inspection body, the threaded fastener to be detected is installed in the installation hole, and the top end face of the installed threaded fastener to be detected can be kept parallel to the upper detection plane by means of threaded fit of the threaded fastener to be detected and the installation hole without cooperation of other auxiliary tools; the upper detection plane and the lower detection plane are used as references, whether the threaded fastener is abnormal or not after being installed is judged according to the position of the top end face of the threaded fastener to be detected, a three-coordinate detection method is replaced for detection, operation complexity and operation difficulty are effectively reduced, detection time is saved, and detection efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of threaded fastener detection, in particular to a threaded fastener detection tool. Background Art

[0002] In traditional threaded fastener installation status testing, operators will select a certain number of samples from a batch of products for testing.

[0003] During the inspection process, the three-coordinate dimension inspection method is usually used to accurately measure the parts to be tested, and the installation status of the parts to be tested is judged based on the measurement data. Due to the structural characteristics of threaded fasteners, they cannot be inspected parallel to the three-coordinate inspection platform, and auxiliary tools such as go and no-go gauges and gauge blocks are required. The inspection steps are cumbersome, time-consuming, and the inspection efficiency is low.

[0004] Therefore, there is an urgent need to provide a threaded fastener inspection tool that can intuitively detect the installation status of the threaded fastener to be tested, without the need for other auxiliary tools for inspection and to improve inspection efficiency. Utility Model Content

[0005] The utility model aims to provide a threaded fastener inspection tool, which can visually inspect the installation status of the threaded fastener to be inspected, without the need for other auxiliary tools to perform the inspection and improve the inspection efficiency.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] The utility model provides a threaded fastener inspection tool, which comprises:

[0008] An inspection body, the inspection body having an upper inspection plane and a lower inspection plane, the lower inspection plane being arranged parallel to the upper inspection plane and maintaining a preset interval;

[0009] The inspection body is provided with a mounting hole, which passes through the upper detection plane and the lower detection plane. The mounting hole is used to accommodate a threaded fastener to be tested and is threadedly connected to the threaded fastener to be tested so that the top end surface of the threaded fastener to be tested is parallel to the upper detection plane.

[0010] As an optional technical solution for a threaded fastener inspection tool, the inspection body is provided with an inspection groove recessed inwardly from the upper inspection plane, the lower inspection plane is located at the bottom wall of the inspection groove, and the inspection groove is connected to the mounting hole.

[0011] As an optional technical solution for a threaded fastener inspection fixture, a plurality of the mounting holes are arranged at intervals, and the plurality of mounting holes are arranged in at least one row.

[0012] As an optional technical solution of a threaded fastener inspection tool, each row of the mounting holes is arranged at intervals along the first direction, at least one detection groove is provided, and each detection groove extends along the first direction and connects a row of the mounting holes.

[0013] As an optional technical solution of a threaded fastener inspection tool, the inspection groove extends along a first direction through the center of the mounting hole and has two ends extending to the outside of the mounting hole.

[0014] As an optional technical solution of a threaded fastener inspection fixture, the upper inspection plane is located on the top end surface of the inspection body, and the bottom end surface of the inspection body has a supporting plane parallel to the upper inspection plane.

[0015] As an optional technical solution for a threaded fastener inspection fixture, the mounting hole includes a main hole and a tapered hole connected to the main hole, the main hole is provided with an internal thread for cooperating with an external thread of the threaded fastener to be tested, the axes of the main hole and the tapered hole coincide, and the tapered hole is used to accommodate a tapered nut of the threaded fastener to be tested.

[0016] As an optional technical solution for a threaded fastener inspection fixture, the mounting hole also includes a secondary hole, the tapered hole and the secondary hole are respectively connected to the two ends of the main hole, the inner diameter of the secondary hole is smaller than the inner diameter of the main hole, and a stop surface for limiting the threaded fastener to be tested is formed between the main hole and the secondary hole.

[0017] As an optional technical solution for a threaded fastener inspection fixture, the secondary hole coincides with the axis of the main hole, and the mounting hole passes through the inspection body.

[0018] As an optional technical solution for a threaded fastener inspection fixture, the cross-section of the inspection body is convex-shaped, the middle of the inspection body is provided with the upper inspection plane, and two lower inspection planes are provided, and the two lower inspection planes are respectively located on both sides of the upper inspection plane.

[0019] Beneficial effects:

[0020] The utility model provides a threaded fastener inspection tool, which includes an inspection body, the inspection body has an upper inspection plane, the upper inspection plane is arranged parallel to the lower inspection plane and maintains a preset interval; the inspection body is provided with a mounting hole, the mounting hole passes through the upper inspection plane and the lower inspection plane, the mounting hole is used to accommodate the threaded fastener to be tested and is threadedly connected with the threaded fastener to be tested, so that the top end surface of the threaded fastener to be tested is parallel to the upper inspection plane. By setting the mounting hole on the inspection body, and installing the threaded fastener to be tested in the mounting hole, the threaded fastener to be tested is matched with the mounting hole thread, and no other auxiliary tools are required, so that the top end surface of the threaded fastener to be tested can be kept parallel to the upper inspection plane after installation for subsequent detection; by setting the upper inspection plane and the lower inspection plane on the inspection body as a reference, the installation state of the threaded fastener to be tested is detected by using the position of the top end surface of the threaded fastener to be tested relative to the position of the upper inspection plane and the lower inspection plane, and no repeated measurement is required, which saves detection time and effectively improves detection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the structure of the threaded fastener inspection tool provided by the embodiment of the utility model. Figure 1 ;

[0022] Figure 2 yes Figure 1 A partial enlarged view of the middle A;

[0023] Figure 3 This is a schematic diagram of the structure of the threaded fastener inspection tool provided by the embodiment of the utility model. Figure 2 ;

[0024] Figure 4 yes Figure 3 A partial enlarged view of point B in the middle;

[0025] Figure 5 It is a flow chart of a threaded fastener detection method provided by an embodiment of the utility model.

[0026] In the figure:

[0027] 10. Inspection body; 11. Upper inspection plane; 12. Lower inspection plane; 13. Mounting hole; 13a. First mounting hole; 13b. Second mounting hole; 131. Conical hole; 132. Main hole; 133. Secondary hole. DETAILED DESCRIPTION

[0028] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0029] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0031] In the description of this embodiment, the terms "upper", "lower", "right", etc., are based on the directions or positions shown in the drawings, and are only for the convenience of description and simplified operation, 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 a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0032] like Figures 1 to 4 As shown, on one hand, the present embodiment provides a threaded fastener inspection tool, which includes an inspection body 10, the inspection body 10 has an upper inspection plane 11 and a lower inspection plane 12, the lower inspection plane 12 is arranged parallel to the upper inspection plane 11 and maintains a preset interval, the inspection body 10 is provided with a mounting hole 13, the mounting hole 13 passes through the upper inspection plane 11 and the lower inspection plane 12, the mounting hole 13 is used to accommodate the threaded fastener to be tested and is threadedly connected to the threaded fastener to be tested, so that the top surface of the threaded fastener to be tested is parallel to the upper inspection plane 11.

[0033] By setting a mounting hole 13 on the inspection body 10 and installing the threaded fastener to be tested in the mounting hole 13, the threaded fastener to be tested can be threadedly matched with the mounting hole 13, and no other auxiliary tools are needed, so that the top end surface of the threaded fastener to be tested can be kept parallel to the upper detection plane 11 after installation to facilitate subsequent detection; by setting an upper detection plane 11 and a lower detection plane 12 as a reference on the inspection body 10, the installation state of the threaded fastener to be tested is detected by using the position of the top end surface of the threaded fastener to be tested relative to the position of the upper detection plane 11 and the lower detection plane 12, which does not require repeated measurements, saves detection time and effectively improves detection efficiency.

[0034] In this embodiment, the inspection body 10 is in a convex block shape; an upper detection plane 11 is provided on the top surface of the inspection body 10; an upper detection plane 11 is provided in the middle of the inspection body 10, and two lower detection planes 12 are provided, and the two lower detection planes 12 are respectively located on both sides of the upper detection plane 11. The first direction takes the direction of the long side extension of the inspection body 10 as an example, the second direction takes the direction of the short side extension of the inspection body 10 as an example, and the third direction takes the height direction of the inspection body 10 as an example.

[0035] Furthermore, the inspection body 10 is provided with an inspection groove recessed inward from the upper inspection plane 11, and the lower inspection plane 12 is located at the bottom wall of the inspection groove, and the inspection groove is connected with the mounting hole 13. By providing the inspection groove and forming the lower inspection plane 12 at the bottom wall of the inspection groove, it is ensured that the height of the lower inspection plane 12 is lower than the height of the upper inspection plane 11; by providing the inspection groove and connecting with the mounting hole 13, when the threaded fastener to be tested is installed in the mounting hole 13, the lower inspection plane 12 can be observed from the side, which is convenient for comparing the height of the threaded fastener to be tested with the lower inspection plane 12.

[0036] Optionally, a plurality of mounting holes 13 are arranged at intervals, and the plurality of mounting holes 13 are arranged in at least one row; each row of mounting holes 13 is arranged at intervals along the first direction, and at least one detection groove is provided, and each detection groove extends along the first direction and connects a row of mounting holes 13. By setting a plurality of mounting holes 13, a large number of threaded fasteners to be tested can be satisfied, and batch testing can be achieved. By setting a detection groove that can connect a row of mounting holes 13, a lower detection plane 12 of the bottom wall of a detection groove can be used as a reference to detect the installation status of a row of mounting holes 13. The structure is simple and convenient for inspection tool processing, and there is no need to separately open a detection groove for each mounting hole 13 to form a lower detection plane 12.

[0037] Optionally, the detection groove extends through the center of the mounting hole 13 along the first direction and both ends extend to the outside of the mounting hole 13. By setting the detection groove to pass through the center of the mounting hole 13 along the first direction, the upper detection plane 11 and the lower detection plane 12 are respectively located on both sides of the mounting hole 13 and separated along the center of the mounting hole 13, which facilitates comparison of the installation state of the threaded fastener to be tested from the center position, which helps to ensure the accuracy of the detection result.

[0038] In this embodiment, the mounting holes 13 extend along the third direction, and the mounting holes 13 are arranged in two rows at intervals along the second direction, the first row includes four first mounting holes 13a arranged at intervals along the first direction, and the second row includes four second mounting holes 13b arranged at intervals along the first direction; the upper detection plane 11 extends along the first direction and is located between the two rows of mounting holes 13, and two detection grooves are provided and are respectively located on both sides of the upper detection plane 11; the detection groove extends along the second direction, and the bottom wall of the detection groove serves as the lower detection plane 12, one side of the detection groove has a side wall, and the other side passes through the inspection body 10 to form a notch, the top end of the side wall is connected to the upper detection plane 11, and the bottom end of the side wall is connected to the lower detection plane 12, and the plane where the side wall is located is perpendicular to the upper detection plane 11 and the lower detection plane 12. The connection between the side wall of the detection groove and the upper detection plane 11 forms an upper specification line, and the connection between the side wall of the detection groove and the lower detection plane 12 forms a lower specification line, and the positions of the upper specification line and the lower specification line correspond to the highest limit position and the lowest limit position respectively.

[0039] Furthermore, the top surface of the test body 10 is provided with an upper detection plane 11, and the bottom surface of the test body 10 is provided with a support plane parallel to the upper detection plane 11. By providing the support plane, when the test body 10 is placed at a specific position, the support plane can be attached to the surface of the specific position, thereby ensuring the position of the upper detection plane 11, and avoiding the detection result being affected by the tilt or unevenness of the bottom surface of the test body 10.

[0040] See also Figure 3 and Figure 4The mounting hole 13 includes a main hole 132 and a tapered hole 131 connected to the main hole 132. The main hole 132 is provided with an internal thread for matching with the external thread of the threaded fastener to be tested. The axes of the main hole 132 and the tapered hole 131 coincide with each other. The tapered hole 131 is used to accommodate the tapered nut of the threaded fastener to be tested. By setting the main hole 132 and the tapered hole 131, it is possible to detect the taper of the threaded fastener to be tested, and to judge the tail diameter by the height of the top surface of the threaded fastener to be tested. In this embodiment, the mounting hole 13 passes through the inspection body 10 along the third direction. The mounting hole 13 also includes a secondary hole 133. The tapered hole 131 and the secondary hole 133 are respectively connected to the two ends of the main hole 132. The inner diameter of the secondary hole 133 is smaller than the inner diameter of the main hole 132. A stop surface is formed between the main hole 132 and the secondary hole 133 to limit the threaded fastener to be tested. In this embodiment, the threaded fastener to be tested can be a slotted countersunk screw, one end of the slotted countersunk screw is against the stop surface, and the other end has a nut. The slotted countersunk screw is installed in the mounting hole 13 of the inspection body 10, and the top surface of the nut of the slotted countersunk screw is parallel to the upper detection plane 11 and the lower detection plane 12.

[0041] like Figure 5 As shown, another aspect of this embodiment provides a threaded fastener detection method, using the above-mentioned threaded fastener detection fixture, including the following steps:

[0042] Step S1, prepare a threaded fastener to be tested, and install the threaded fastener to be tested in the installation hole 13 of the threaded fastener inspection fixture.

[0043] The threaded fastener needs to be installed and matched with the screw hole during use, and the corresponding installation hole 13 is opened on the inspection body 10 according to the specification size of the threaded fastener. For example, the total length of the main hole 132 and the tapered hole 131 of the installation hole 13 is determined according to the standard total length of the threaded fastener to be tested, and the size of the tapered hole 131 is determined according to the standard taper and standard thickness of the head of the threaded fastener to be tested.

[0044] According to the number of mounting holes 13 set on the inspection body 10, a number of threaded fasteners to be tested are prepared, and the actual installation conditions are simulated, and the threaded fasteners to be tested are installed in the mounting holes 13 of the threaded fastener inspection fixture. By simulating the actual production of the inspection fixture and installation, it is helpful to ensure the accuracy and reliability of the inspection, thereby ensuring the validity of the inspection results, so as to better strengthen the quality control of the products after the threaded fasteners are installed.

[0045] It should be noted that during the testing process, attention should be paid to the protection of the threaded fastener inspection fixture to prevent the threaded fasteners to be tested from causing damage to the threaded fastener inspection fixture.

[0046] Step S2, taking the upper detection plane 11 and the lower detection plane 12 as references, judging the installation state of the threaded fastener to be tested according to the height of the top end surface of the threaded fastener to be tested.

[0047] If the top surface of the threaded fastener to be tested is at a height lower than the lower detection plane 12, it is determined to be abnormally installed; if the top surface of the threaded fastener to be tested is at a height higher than the upper detection plane 11, it is determined to be abnormally installed. If the top surface of the threaded fastener to be tested is higher than the lower detection plane 12 and lower than the upper detection plane 11, it is determined to be installed properly.

[0048] When observing and judging the installation status of the threaded fastener to be tested, it is necessary to visually observe the top surface of the nut of the threaded fastener to be tested horizontally, and judge the position of the top surface of the nut and the upper detection plane 11 and the lower detection plane 12 (that is, compare and observe the positions of the upper specification line and the lower specification line to correspond to the highest limit position and the lowest limit position).

[0049] The threaded fastener detection method installs the threaded fastener to be tested in the installation hole 13 of the threaded fastener fixture, takes the upper detection plane 11 and the lower detection plane 12 as references, and judges the installation status of the threaded fastener according to the height of the top surface of the threaded fastener, thereby judging whether there is any abnormality in the threaded fastener after installation, and replaces the three-coordinate detection method for detection, effectively reducing the operation complexity and difficulty, saving detection time, and improving detection efficiency.

[0050] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. A threaded fastener inspection fixture, characterized in that: include: A test body (10), the test body (10) having an upper detection plane (11) and a lower detection plane (12), the lower detection plane (12) being arranged parallel to the upper detection plane (11) and maintaining a preset interval; The inspection body (10) is provided with a mounting hole (13), the mounting hole (13) passing through the upper detection plane (11) and the lower detection plane (12), the mounting hole (13) being used to accommodate a threaded fastener to be tested and being threadedly connected to the threaded fastener to be tested so that the top end surface of the threaded fastener to be tested is parallel to the upper detection plane (11).

2. The threaded fastener inspection tool according to claim 1, characterized in that: The inspection body (10) is provided with a detection groove inwardly concave from the upper detection plane (11), the lower detection plane (12) is located on the bottom wall of the detection groove, and the detection groove is connected to the mounting hole (13).

3. The threaded fastener inspection tool according to claim 2, characterized in that: A plurality of the mounting holes (13) are arranged at intervals, and the plurality of mounting holes (13) are arranged in at least one row.

4. The threaded fastener inspection tool according to claim 3, characterized in that: Each row of the mounting holes (13) is arranged at intervals along the first direction, at least one detection groove is provided, and each detection groove extends along the first direction and is connected to a row of the mounting holes (13).

5. The threaded fastener inspection tool according to claim 3, characterized in that: The detection groove extends along a first direction through the center of the mounting hole (13) and has two ends extending to the outside of the mounting hole (13).

6. The threaded fastener inspection tool according to claim 1, characterized in that: The upper detection plane (11) is located on the top end surface of the inspection body (10), and the bottom end surface of the inspection body (10) has a supporting plane parallel to the upper detection plane (11).

7. The threaded fastener inspection tool according to claim 1, characterized in that: The mounting hole (13) comprises a main hole (132) and a tapered hole (131) connected to the main hole (132); the main hole (132) is provided with an internal thread for matching with an external thread of the threaded fastener to be tested; the axes of the main hole (132) and the tapered hole (131) coincide; and the tapered hole (131) is used to accommodate a tapered nut of the threaded fastener to be tested.

8. The threaded fastener inspection tool according to claim 7, characterized in that: The mounting hole (13) further comprises a secondary hole (133), the tapered hole (131) and the secondary hole (133) respectively communicating with two ends of the main hole (132), the inner diameter of the secondary hole (133) being smaller than the inner diameter of the main hole (132), and a stop surface for limiting the position of the threaded fastener to be tested is formed between the main hole (132) and the secondary hole (133).

9. The threaded fastener inspection tool according to claim 8, characterized in that: The axes of the secondary hole (133) and the main hole (132) coincide with each other, and the mounting hole (13) passes through the inspection body (10).

10. The threaded fastener inspection tool according to claim 1, characterized in that: The cross section of the inspection body (10) is in a convex shape. The upper detection plane (11) is provided in the middle of the inspection body (10). Two lower detection planes (12) are provided, and the two lower detection planes (12) are respectively located on both sides of the upper detection plane (11).

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