A rivet core rod ejection force detection tooling

Abstract

The present invention discloses a detection tool for the ejection force of a rivet core rod, which includes a riveting part, a push rod, and an upper base and a lower base that are opposite to each other up and down. The riveting part is arranged in the first groove. The riveting part includes an upper riveting piece and a lower riveting piece. The upper riveting piece and the lower riveting piece are riveted by the rivet to be measured. Different riveting parts can be used to rivet different types of rivets to be measured. By pressing down the upper base, the push rod ejects the core rod head of the rivet to be measured, and the pressure detection device measures the applied pressure, that is, the ejection force of the rivet. Therefore, there is no need to replace the tooling, and the ejection force of different rivets can be tested by replacing the riveting parts.

Description

Technical Field

[0001] The present invention relates to the technical field of rivet ejection force detection, and particularly relates to a detection tool for the ejection force of a rivet core rod. Background Art

[0002] Rivets are a type that is widely used in the field of aviation standard parts, mainly used for single-sided connection of aircraft skins and other composite materials. The rivets applied in the aviation field are mostly blind rivets. The structure of blind rivets is much more complex than that of general fasteners, and is usually assembled from components such as a rivet body and a core rod. Therefore, the product must be tested for multiple mechanical indexes, and the core rod ejection force is one of them. The ejection force refers to the axial pressure applied to the head of the riveted core rod to slowly eject the head of the core rod from the inside of the rivet body.

[0003] At present, there are two problems in the ejection force test. One is that the relevant standards do not uniformly stipulate the tooling fixtures for this detection item, which results in large differences in the test results obtained by different testers on different equipment and different tooling fixtures. The second point is that there are many types of blind rivets with diverse structures, and the problem of rapid interchangeability of the tooling has not been well solved. Summary of the Invention

[0004] The purpose of the present invention is to at least solve one of the technical problems existing in the prior art, and provide a detection tool for the ejection force of a rivet core rod, which can measure the ejection force of different types of rivets.

[0005] The present invention provides a detection tool for the ejection force of a rivet core rod, including a riveted part, a top rod, and an upper base and a lower base arranged oppositely up and down. The riveted part is provided with a rivet to be tested. The upper end of the lower base is provided with a first groove, and a first through hole is provided below the first groove. The riveted part is arranged in the first groove. The upper end of the upper base is provided with a second through hole opposite to the rivet to be tested. The top rod is arranged in the second through hole, and a cover plate is provided at the upper end of the second through hole.

[0006] Advantageous Effects: The riveted part of the present invention is arranged in the first groove. The riveted part is used for riveting the rivet to be tested. Different riveted parts can rivet different types of rivets to be tested. By pressing down the upper base, the top rod ejects the head of the core rod of the rivet to be tested, and the pressure applied is measured by a pressure detection device, which is the ejection force of the rivet. Therefore, there is no need to replace the tooling, and the ejection force of different rivets can be tested by replacing the riveted part. It avoids the problem of the measurement result accuracy caused by the systematic error factors of different toolings, solves the test problem of different product models through the rapid interchange of the local structure of the tooling, and improves the on-site detection efficiency.

[0007] According to the present invention, a rivet core rod ejection force detection tooling is provided. The riveted part includes an upper riveting piece and a lower riveting piece, and the upper riveting piece and the lower riveting piece are riveted by the rivet to be measured.

[0008] According to the present invention, a rivet core rod ejection force detection tooling is provided. The upper end of the upper base is provided with a first installation groove communicating with the second through hole, and the cover plate is arranged in the first installation groove.

[0009] According to the present invention, a rivet core rod ejection force detection tooling is provided. The cover plate is connected to the upper base by screws.

[0010] According to the present invention, a rivet core rod ejection force detection tooling further includes a guide rod and a guide sleeve. The guide sleeve is installed on the lower base. The guide rod is vertically arranged. One end of the guide rod is connected to the upper base, and the other end is connected to the guide sleeve. The guide rod can move along the guide sleeve.

[0011] According to the present invention, a rivet core rod ejection force detection tooling is provided. The upper base includes an upper plate and a first boss arranged on the lower end face of the upper plate. The upper plate and the first boss form a first step. The first step surface of the first step is provided with a first installation hole, and one end of the guide rod is arranged in the first installation hole; the lower base includes a lower plate and a second boss arranged on the upper end face of the lower plate. The lower plate and the second boss form a second step. The second step surface of the second step is provided with a second installation hole opposite to the first installation hole, and the guide sleeve is arranged in the second installation hole.

[0012] According to the present invention, a rivet core rod ejection force detection tooling is provided. The lower end face of the upper base is provided with an avoidance groove, and the avoidance groove is arranged at the bottom of the second through hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The present invention will be further described below in conjunction with the drawings and embodiments;

[0014] Figure 1 It is a sectional view of the rivet core rod ejection force detection tooling in a preferred embodiment of the present invention;

[0015] Figure 2 It is a sectional view of the upper base in a preferred embodiment of the present invention;

[0016] Figure 3 It is a sectional view of the lower base in a preferred embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0017] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. The function of the accompanying 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 invention. However, it should not be construed as a limitation on the protection scope of the present invention.

[0018] In the description of the present invention, it should be understood that for the orientation description, such as the orientation or positional relationship indicated by up, down, front, back, left, right, etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present invention 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 invention.

[0019] In the description of the present invention, the meaning of "several" is one or more, the meaning of "multiple" is more than two, "greater than", "less than", "exceeding", etc. are understood as not including the recited number, and "above", "below", "within", etc. are understood as including the recited 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 the sequence relationship of the indicated technical features.

[0020] In the description of the present invention, unless otherwise clearly defined, words such as "set", "install", "connect", etc. should be understood in a broad sense. Those skilled in the art can reasonably determine the specific meaning of the above words in the present invention in combination with the specific content of the technical solution.

[0021] Referring to Figures 1 - 3 , the present invention provides a rivet core rod ejection force detection tooling, including a riveting part 700, a ejector rod 400, and an upper base 100 and a lower base 200 that are opposite to each other up and down. The riveting part 700 includes an upper riveting piece 701 and a lower riveting piece 702. The upper riveting piece 701 and the lower riveting piece 702 are riveted by a rivet 600 to be measured. The shape of the rivet part can be a cube, a cylinder, etc. In this embodiment, the shape of the rivet part is a cuboid. A first groove 201 is provided at the upper end of the lower base 200, and a first through hole 202 is provided below the first groove 201. The riveting part 700 is arranged in the first groove 201, and the rivet part can be disassembled and replaced. A second through hole 102 opposite to the rivet 600 to be measured is provided at the upper end of the upper base 100. The ejector rod 400 is arranged in the second through hole 102. A cover plate 101 is provided at the upper end of the second through hole 102. The cover plate 101 is detachable. During use, first remove the cover plate 101, then put the ejector rod 400 into the second through hole 102, and then install the cover plate 101, which is convenient for installing the ejector rod 400.

[0022] In the present invention, by disposing the riveting member 700 within the first groove 201, the rivet member can be disassembled and replaced at will. Different riveting members 700 can be used to rivet different types of rivets 600 to be measured. By pressing down the upper base 100, the ejector rod 400 ejects the core rod head 601 of the rivet 600 to be measured, and the pressure detection device measures the applied pressure, which is the upsetting force of the rivet. Therefore, there is no need to replace the tooling, but instead, different types of rivets can be tested for their upsetting force by replacing the riveting member 700.

[0023] Furthermore, the upper end of the upper base 100 is provided with a first mounting groove 108 communicating with the second through hole 102, and the cover plate 101 is disposed within the first mounting groove 108. By providing the mounting groove, the cover plate 101 is flush with the upper end surface of the upper base 100.

[0024] Furthermore, the cover plate 101 is connected to the upper base 100 by screws, and in other embodiments, it can also be a snap connection.

[0025] Furthermore, the detection tooling of this embodiment further includes a guide rod 300 and a guide sleeve 500. The upper base 100 includes an upper plate 107 and a first boss 106 disposed on the lower end surface of the upper plate 107. The upper plate 107 and the first boss 106 form a first step, and a first mounting hole 104 is provided on the first step surface 105 of the first step. The lower base 200 includes a lower plate 203 and a second boss 204 disposed on the upper end surface of the lower plate 203. The lower plate 203 and the second boss 204 form a second step, and a second mounting hole 205 opposite to the first mounting hole 104 is provided on the second step surface 206 of the second step. The guide sleeve 500 is disposed within the second mounting hole 205, and the guide sleeve 500 and the second mounting hole 205 are in interference fit. One end of the guide rod 300 is disposed within the first mounting hole 104, and the other end is connected to the guide sleeve 500. The guide rod 300 can move along the guide sleeve 500, and both the guide rod 300 and the guide sleeve 500 are vertically disposed. Both the upper base 100 and the lower base 200 are stepped, which is convenient for assembling the guide rail and the guide sleeve 500. Through the cooperation of the guide rod 300 and the guide sleeve 500, the upper base 100 and the lower base 200 can perform precise axial movement.

[0026] Furthermore, an avoidance groove 103 is provided on the lower end surface of the upper base 100, and the avoidance groove 103 is disposed at the bottom of the second through hole 102. The avoidance groove 103 should be slightly larger than the head of the rivet 600 to be measured, and is used to avoid interference and collision between the head of the rivet body 602 and the upper base 100.

[0027] The working principle of the present invention is as follows: First, the upper riveting piece 701 and the lower riveting piece 702 are riveted with the rivet under test 600 to form a rivet part. The rivet body 602 and the core rod head 601 of the rivet under test 600 are inside the rivet part. Then, the rivet part is placed in the first groove 201, and the guide post of the upper base 100 is inserted into the inverted sleeve for pre-insertion to ensure accurate guidance. The cover plate 101 is removed, the ejector rod 400 is placed in the second through hole 102, and then the cover plate 101 is installed. The lower base 200 is placed on the workbench of the crossbeam of the press, and the tooling moves upward with the crossbeam. When the upper base 100 contacts the fixed beam on the press, it is equivalent to the equipment starting to apply a load pressure to the entire tooling. In this way, the cover plate 101 applies a certain pressure to the ejector rod 400, and the ejector rod 400 applies force to push the core rod head 601 out of the inside of the rivet body 602. The detection equipment collects the force value of the prepared ejection force in real time through the pressure sensor.

[0028] The embodiments of the present invention have been described in detail above 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 said technical field, various changes can be made without departing from the gist of the present invention.

Claims

1. A rivet core rod ejection force detection tooling, characterized in that, Comprising: A riveting part (700), a ejector rod (400), and an upper base (100) and a lower base (200) which are arranged oppositely up and down. A rivet to be measured (600) is provided on the riveting part (700). A first groove (201) is provided at the upper end of the lower base (200). A first through hole (202) is provided below the first groove (201). The riveting part (700) is arranged in the first groove (201). A second through hole (102) opposite to the rivet to be measured (600) is provided at the upper end of the upper base (100). The ejector rod (400) is arranged in the second through hole (102). A cover plate (101) is provided at the upper end of the second through hole (102); It further comprises a guide rod (300) and a guide sleeve (500). The guide sleeve (500) is installed on the lower base (200). The guide rod (300) is arranged vertically. One end of the guide rod (300) is connected to the upper base (100), and the other end is connected to the guide sleeve (500). The guide rod (300) can move along the guide sleeve (500); The upper base (100) comprises an upper plate (107) and a first boss (106) arranged on the lower end face of the upper plate (107). The upper plate (107) and the first boss (106) form a first step. A first mounting hole (104) is provided on the first step surface (105) of the first step. One end of the guide rod (300) is arranged in the first mounting hole (104); The lower base (200) comprises a lower plate (203) and a second boss (204) arranged on the upper end face of the lower plate (203). The lower plate (203) and the second boss (204) form a second step. A second mounting hole (205) opposite to the first mounting hole (104) is provided on the second step surface (206) of the second step. The guide sleeve (500) is arranged in the second mounting hole (205); The riveting part (700) comprises an upper riveting piece (701) and a lower riveting piece (702). The upper riveting piece (701) and the lower riveting piece (702) are riveted by the rivet to be measured (600).

2. The rivet core rod ejection force detection tooling according to claim 1, wherein: A first mounting groove (108) communicating with the second through hole (102) is provided at the upper end of the upper base (100). The cover plate (101) is arranged in the first mounting groove (108).

3. The rivet core rod ejection force detection tooling according to claim 1 or 2, characterized in that: The cover plate (101) is connected to the upper base (100) by screws.

4. The rivet core rod ejection force detection tooling according to claim 1, characterized in that: An avoidance groove (103) is provided at the lower end of the upper base (100). The avoidance groove (103) is arranged at the bottom of the second through hole (102).

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