Tool for testing push-out force of core rod of self-plugging rivet

Abstract

The utility model discloses a tool for testing the push-out force of a core rod of a self-plugging rivet, and relates to the technical field of aviation standard parts. A tool for testing the push-out force of a core rod of a self-plugging rivet comprises a mounting base, a guide sleeve, an ejector rod and a rivet to be tested. The pushing-out force of the core rod can be measured and calculated by applying vertical downward axial force to the ejector rod through mechanical equipment. In the testing process, firstly, a tested rivet is riveted, assembled and formed in the mounting base through a special riveter to form a rivet body, and then the guide sleeve is embedded into the mounting base; the ejector rod is inserted into the guide sleeve, the diameter of the end portion of the ejector rod is slightly smaller than that of the core rod, the ejector rod is in axial contact with the core rod of the detected rivet, the assembly connection structure guarantees accuracy in the riveting installation process, a good guide system is formed, finally, vertical downward axial force is applied through mechanical equipment, and the force measuring system accurately collects the push-out force of the core rod.

Description

Technical Field

[0001] The utility model relates to the technical field of aviation standard parts, and particularly relates to a test tool for the core rod pushing force of a blind rivet. Background Art

[0002] In the field of aviation standard parts, due to the many advantages of blind rivets compared with traditional fasteners, they are widely used in the single-sided connection of aircraft skins and other narrow spaces. Because of the variety, large quantity and wide range of application parts. Therefore, a series of mechanical indexes need to be detected before the products are used, including the core rod pushing force, to ensure the firmness, reliability and safety of the assembled parts during flight.

[0003] At present, there are three problems in this field:

[0004] The first is the problem of the accuracy of the test results. The relevant standards only expound the principle, but do not uniformly stipulate the tooling fixtures, the equipment used, and the riveting method, resulting in difficulty in grasping the accuracy of the core rod pushing force.

[0005] The second point is that there are many types and diverse structures of blind rivets, and the styles of tooling fixtures are various, and the universality of the tooling has not been well solved.

[0006] The third and very important point is the safety problem during the test process. Content of the Utility Model

[0007] The purpose of the utility model is to solve at least one of the technical problems existing in the prior art, and provide a test tool for the core rod pushing force of a blind rivet, which can solve the problems of test accuracy, universality and safety during the test process.

[0008] The utility model provides a test tool for the core rod pushing force of a blind rivet, which includes an installation base, a guide sleeve, a push rod and a rivet to be tested; the rivet to be tested includes a rivet body, a nail sleeve and a core rod; the rivet to be tested is riveted on the installation base, the guide sleeve is inserted into the installation base, the push rod is movably inserted into the guide sleeve, one end of the push rod abuts against the end of the core rod of the rivet to be tested, and the pushing force of the core rod can be measured by applying a vertical downward axial force to the push rod through a mechanical device.

[0009] A testing tool for the pushing-out force of the core rod of a blind rivet according to an embodiment of the present utility model has at least the following beneficial effects: A testing tool for the pushing-out force of the core rod of a blind rivet includes a mounting base, a guide sleeve, a push rod, and a rivet to be tested. The rivet to be tested includes a rivet body, a sleeve, and a core rod. The rivet to be tested is riveted on the mounting base. The guide sleeve is inserted into the mounting base. The push rod is movably inserted into the guide sleeve. One end of the push rod abuts against the end of the core rod of the rivet to be tested. By applying an axial force perpendicular to the downward direction to the push rod through a mechanical device, the pushing-out force of the core rod can be measured. During the testing process, first, the rivet to be tested is riveted and assembled into a formed rivet body in the mounting base through a special riveting gun, and then the guide sleeve is embedded into the mounting base; the push rod is inserted into the guide sleeve, and the end of the push rod is slightly smaller than the diameter of the core rod and is in axial contact with the core rod of the rivet to be tested. The above assembly connection structure not only ensures the accuracy of the riveting installation process but also forms a good guiding system. Finally, an axial force perpendicular to the downward direction is applied through a mechanical device, and the force measuring system accurately collects the pushing-out force of the core rod.

[0010] For a testing tool for the pushing-out force of the core rod of a blind rivet according to the present utility model, the mounting base includes a first mounting groove, a riveting ring, and a second mounting groove. The guide sleeve is inserted into the first mounting groove, and the first mounting groove and the guide sleeve are in clearance fit. The rivet to be tested is riveted on the riveting ring. One end of the rivet to be tested is received in the first mounting groove, and the other end is received in the second mounting groove.

[0011] For a testing tool for the pushing-out force of the core rod of a blind rivet according to the present utility model, the guide sleeve is provided with a push rod hole and an avoidance groove. The push rod is inserted through the push rod hole, and the upper end of the rivet to be tested is received in the avoidance groove.

[0012] For a testing tool for the pushing-out force of the core rod of a blind rivet according to the present utility model, the mounting base is made by machining after forging.

[0013] For a testing tool for the pushing-out force of the core rod of a blind rivet according to the present utility model, the height of the second mounting groove is greater than the height of one end of the rivet to be tested received in the second mounting groove.

[0014] Additional aspects and advantages of the present utility model will be given in part in the following description, become apparent in part from the following description, or be understood through the practice of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present utility model will be further described below in conjunction with the drawings and embodiments;

[0016] Figure 1 It is a cross-sectional view of a preferred embodiment of the present utility model;

[0017] Figure 2A cross-sectional view of the mounting base according to a preferred embodiment of the present utility model;

[0018] Figure 3 A cross-sectional view of the assembly of the guide sleeve and the ejector rod according to a preferred embodiment of the present utility model. Detailed implementation manners

[0019] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the drawings. The role of the drawings is to supplement the description in the text part of the specification, enabling people to intuitively and vividly understand each technical feature and the overall technical solution of the present utility model. However, it should not be construed as a limitation on the protection scope of the present utility model.

[0020] In the description of the present utility model, it should be understood that for the orientation description, such as the upper, lower, front, rear, left, right, etc., the orientation or positional relationship indicated is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation on the present utility model.

[0021] In the description of the present utility model, the meaning of "several" is one or more, the meaning of "multiple" is two or more, "greater than", "less than", "exceeding", etc. are understood as not including the original number, and "above", "below", "within", etc. are understood as including the original number. If there is a description of "first" and "second", it is only for the purpose of distinguishing technical features and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.

[0022] In the description of the present utility model, unless otherwise clearly defined, terms such as "set", "installed", "connected", etc. should be understood in a broad sense. Those skilled in the art can reasonably determine the specific meanings of the above terms in the present utility model in combination with the specific content of the technical solution.

[0023] Referring to Figures 1 to 3 , a core rod ejection force test tooling for a blind rivet includes a mounting base 10, a guide sleeve 20, an ejector rod 30, and a rivet 40 to be measured. The rivet 40 to be measured includes a rivet body, a rivet sleeve, and a core rod. The rivet 40 to be measured is riveted on the mounting base 10. The guide sleeve 20 is inserted into the mounting base 10. The ejector rod 30 is movably inserted into the guide sleeve 20. One end of the ejector rod 30 abuts against the end of the core rod of the rivet 40 to be measured. By applying an axial force perpendicular to the downward direction to the ejector rod 30 through a mechanical device, the ejection force of the core rod can be measured.

[0024] It can be understood that during the testing process, first, the rivet 40 to be tested is riveted and assembled in the mounting base 10 through a special riveting gun to form a rivet body. Then, the guide sleeve 20 is inserted into the mounting base 10. The ejector rod 30 is inserted into the guide sleeve 20. The end of the ejector rod 30 is slightly smaller than the core rod diameter and is in axial contact with the core rod of the rivet 40 to be tested. The above assembly connection structure not only ensures the accuracy of the riveting and installation process but also forms a good guiding system. Finally, an axial force perpendicular to the downward direction is applied through a mechanical device, and the force measuring system accurately collects the core rod ejection force.

[0025] Referring to Figures 1 to 3 , the mounting base 10 includes a first mounting groove 11, a riveting ring 12, and a second mounting groove 13. The guide sleeve 20 is inserted into the first mounting groove 11. The first mounting groove 11 and the guide sleeve 20 are in clearance fit. The rivet 40 to be tested is riveted on the riveting ring 12. One end of the rivet 40 to be tested is accommodated in the first mounting groove 11, and the other end is accommodated in the second mounting groove 13.

[0026] It can be understood that the first mounting groove 11 can install the guide sleeve 20, and the guide sleeve 20 can provide guidance for the movement of the ejector rod 30, ensuring that the force output by the ejector rod is output along the axis of the ejector rod 30 to the core rod of the rivet 40 to be tested, ensuring the test accuracy of the force measuring system, and minimizing the measurement error to the greatest extent.

[0027] Referring to Figures 1 to 3 , the guide sleeve 20 is provided with an ejector rod hole 21 and an avoidance groove 22. The ejector rod 30 is inserted through the ejector rod hole 21. The upper end of the rivet 40 to be tested is accommodated in the avoidance groove 22.

[0028] It is worth noting that in some embodiments of the present invention, the mounting base 10 is made by forging and then machining.

[0029] It can be understood that the mounting base 10 processed from the forged blank has the advantages of high strength and long service life.

[0030] Referring to Figures 1 to 3 , the height of the second mounting groove 13 is greater than the height of one end of the rivet 40 to be tested accommodated in the second mounting groove 13.

[0031] It can be understood that the height of the second mounting groove 13 being greater than the height of one end of the rivet 40 to be tested accommodated in the second mounting groove 13 can prevent interference of the rivet 40 to be tested.

[0032] The above has described the embodiments of the present invention in detail with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those of ordinary skill in the art in the technical field, various changes can be made without departing from the purpose of the present invention.

Claims

1. A test tool for the ejection force of a blind rivet mandrel, characterized in that Comprising: An installation base (10), a guide sleeve (20), a ejector rod (30), and a rivet to be measured (40); The rivet to be measured (40) includes a rivet body, a nail sleeve, and a core rod; The rivet to be measured (40) is riveted on the installation base (10), the guide sleeve (20) is inserted into the installation base (10), the ejector rod (30) is movably inserted into the guide sleeve (20), and one end of the ejector rod (30) abuts against the end of the core rod of the rivet to be measured (40). By applying a vertical downward axial force to the ejector rod (30) through a mechanical device, the ejection force of the core rod can be measured.

2. The core rod pushing force test tooling for blind rivets according to claim 1, characterized in that, The installation base (10) includes a first installation groove (11), a riveting ring (12), and a second installation groove (13). The guide sleeve (20) is inserted into the first installation groove (11), and the first installation groove (11) is in clearance fit with the guide sleeve (20). The rivet to be measured (40) is riveted on the riveting ring (12), one end of the rivet to be measured (40) is accommodated in the first installation groove (11), and the other end is accommodated in the second installation groove (13).

3. The core rod ejection force test tooling for blind rivets according to claim 2, characterized in that, The guide sleeve (20) is provided with a ejector rod hole (21) and an avoidance groove (22). The ejector rod (30) is inserted through the ejector rod hole (21), and the upper end of the rivet to be measured (40) is accommodated in the avoidance groove (22).

4. A core rod pushing force test tooling for blind rivets according to claim 1, characterized in that The installation base (10) is made by machining after forging.

5. The core rod ejection force test tooling for blind rivets according to claim 2, characterized in that The height of the second installation groove (13) is greater than the height of the end of the rivet to be measured (40) accommodated in the second installation groove (13).

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