Device for measuring tail groove of tubular rivet

Abstract

The utility model belongs to the field of titanium-niobium tubular rivet processing and measurement, and provides a device for measuring a groove at the tail part of a tubular rivet, which comprises a base, the base comprises a bottom plate and inverted T-shaped frames arranged at the two sides of the bottom plate, strip-shaped main magnets are vertically arranged at the inner sides of the inverted T-shaped frames, a magnet adsorption rod is arranged between the inverted T-shaped frames, and the magnet adsorption rod is connected with the inverted T-shaped frames. First magnets matched with the main magnets are arranged at the two ends of the magnet adsorption rod, a plurality of second magnets distributed at intervals are arranged on the side, facing the bottom plate, of the magnet adsorption rod, threaded rods are arranged on the adsorption sides of the second magnets, and a positioning plate used for positioning the tubular rivets is arranged below the threaded rods. A plurality of positioning holes which are distributed in rows and columns are formed in the positioning plate; each positioning hole is of a countersunk head structure, and the head of each positioning hole faces downwards. The device is reasonable in design, simple in structure and suitable for large-scale popularization, and the measurement difficulty can be reduced and the measurement accuracy can be improved in a measurement sample preparation mode.

Description

Technical Field

[0001] The utility model belongs to the field of titanium-niobium tubular rivet processing and measurement, in particular to a device for measuring a groove at the tail of a tubular rivet. Background Art

[0002] In the aerospace field, titanium-niobium tubular rivets are a kind of high-end rivets, and aircraft manufacturers need a large number of them.

[0003] Since the structure of titanium-niobium tubular rivets is different from that of other tubular rivets, such as the multi-segment cone design of the tail groove, direct measurement with tools will result in large errors, affecting the detection accuracy. If an image measuring instrument is used for measurement, there will be certain blind spots and shadows, which will also produce unnecessary errors. Utility Model Content

[0004] In view of the above-mentioned problems of difficult measurement and large measurement error in the process of measuring the tail groove of a titanium-niobium tubular rivet, the utility model proposes a device for measuring the tail groove of a tubular rivet, which has a reasonable design and a simple structure, is conducive to reducing the measurement difficulty and improving the measurement accuracy.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is that the utility model provides a device for measuring the tail groove of a tubular rivet, including a base, the base including a bottom plate and an inverted T-shaped frame arranged on both sides of the bottom plate, a strip-shaped main magnet is vertically arranged on the inner side of the inverted T-shaped frame, a magnet adsorption rod is arranged between the inverted T-shaped frames, both ends of the magnet adsorption rod are provided with a first magnet that cooperates with the main magnet, a plurality of second magnets distributed at intervals are arranged on the side of the magnet adsorption rod facing the bottom plate, a threaded rod is arranged on the adsorption side of the second magnet, a positioning plate for positioning the tubular rivet is arranged below the threaded rod, and a plurality of positioning holes distributed in rows and columns are arranged on the positioning plate, and the positioning holes are countersunk structures with their heads facing downward.

[0006] Preferably, the threaded rod is of T-shaped structure and its head cooperates with the second magnet, and the second magnet is of round pancake-shaped structure.

[0007] Preferably, the rows and columns of the positioning holes are in a 5X4 formation, each row of positioning holes is parallel to the length direction of the magnet adsorption rod and the specifications of the positioning holes in adjacent rows are different.

[0008] Preferably, a guide groove is provided in the middle of the bottom plate, and a guide block slidably matched with the guide groove is provided at the bottom of the positioning plate.

[0009] Preferably, the hardness and tensile strength of the bottom plate and the inverted T-shaped frame are both less than the hardness and tensile strength of the titanium-niobium alloy.

[0010] Compared with the prior art, the advantages and positive effects of the utility model are:

[0011] 1. The utility model provides a device for measuring the tail groove of a tubular rivet. The tubular rivet to be measured can be inverted and upwardly limited in the positioning hole by using a positioning plate. The magnet adsorption rod can effectively adjust the height of the threaded rod by moving up and down along the inverted T-shaped frame. The threaded rod extends into the tail groove and remains suspended. By injecting a cold mounting agent into the threaded rod and the tail groove, a measurement sample of the tail groove can be obtained, and the measurement sample is conducive to improving the accuracy of the image measuring instrument's measurement of it. The device has a reasonable design and a simple structure. The method of preparing the measurement sample can reduce the measurement difficulty and is conducive to improving the measurement accuracy, and is suitable for large-scale promotion. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the following is a brief introduction to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0013] Figure 1 An axonometric diagram of a device for measuring a groove at the tail of a tubular rivet provided in an embodiment;

[0014] Figure 2 A front view of a device for measuring a groove at the tail of a tubular rivet provided in an embodiment;

[0015] Figure 3 It is a cross-sectional view of a device for measuring the groove at the tail of a tubular rivet in the DD direction;

[0016] Figure 4 A three-dimensional diagram of a magnet adsorption rod provided in an embodiment;

[0017] In the above figures, 1, base; 11, bottom plate; 12, inverted T-shaped frame; 2, main magnet; 3, magnet adsorption rod; 31, first magnet; 32, second magnet; 4, threaded rod; 5, positioning plate; 51, positioning hole; 6, tubular rivet. DETAILED DESCRIPTION

[0018] In order to more clearly understand the above-mentioned purpose, features and advantages of the utility model, the utility model is further described below in conjunction with the accompanying drawings and embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict. For the convenience of description, if the words "upper", "lower", "left" and "right" appear below, they only indicate that the upper, lower, left and right directions are consistent with the drawings themselves, and do not limit the structure.

[0019] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments of the following disclosure.

[0020] Examples, such as Figures 1 to 4 As shown, the utility model provides a device for measuring the tail groove of a tubular rivet, comprising a base 1, wherein the base 1 comprises a bottom plate 11 and an inverted T-shaped frame 12 arranged on both sides of the bottom plate 11, a strip-shaped main magnet 2 is vertically arranged on the inner side of the inverted T-shaped frame 12, a magnet adsorption rod 3 is arranged between the inverted T-shaped frame 12, and a first magnet 31 cooperating with the main magnet 2 is arranged at both ends of the magnet adsorption rod 3, and a plurality of second magnets 32 distributed at intervals are arranged on the side of the magnet adsorption rod 3 facing the bottom plate 11, and a threaded rod 4 is arranged on the adsorption side of the second magnet 32, and a positioning plate 5 for positioning the tubular rivet 6 is arranged below the threaded rod 4, and a plurality of positioning holes 51 distributed in rows and columns are arranged on the positioning plate 5, and the positioning hole 51 is a countersunk structure with its head facing downward. Among them, the magnet adsorption rod 3 and the main magnet 2 adopt a sliding matching method, which can be conveniently adjusted up and down, and can ensure a certain stability after leaving the external force, which is conducive to ensuring the efficiency of preparing the measurement sample.

[0021] In the present device, the base 1 provides a connection foundation for the tubular rivet 6 to be measured, the positioning plate 5 and the magnet adsorption rod 3. The base 1 is placed on the test platform. The positioning plate 5 can be used to limit the tubular rivet 6 to be measured in the positioning hole 51, and the tail groove is in an upward state; the magnet adsorption rod 3 moves up and down along the inverted T-shaped frame 12, while carrying the threaded rod 4 adsorbed by it to sink, and the threaded rod 4 extends into the tail groove and remains suspended. By injecting a cold mounting agent into the threaded rod 4 and the tail groove, a measurement sample of the tail groove can be obtained, and the appearance of the measurement sample represents the corresponding data of the tail groove. After the measurement sample is separated from the threaded rod 4 and the second magnet 32, it is placed in the measurement field of the image measuring instrument, which is conducive to improving the accuracy of the image measuring instrument's measurement of it. This method of preparing measurement samples can reduce the difficulty of measurement, and measurement samples can be prepared for multiple tubular rivets 6 to be measured at the same time, which is more practical and has a higher utilization rate.

[0022] In order to improve the adsorption stability of the threaded rod 4 and the second magnet 32, the threaded rod 4 provided by the utility model is a T-shaped structure and its head cooperates with the second magnet 32, and the second magnet 32 ​​is a pancake-shaped structure. In this way, the threaded rod 4 and the second magnet 32 ​​have a larger adsorption area, which makes it easy to control the height of all the second magnets 32 and the threaded rod 4 by adjusting the magnet adsorption rod 3.

[0023] In order to improve the utilization rate of the device, the rows and columns of the positioning holes 51 provided by the utility model are 5X4 arrays, and each row of positioning holes 51 is parallel to the length direction of the magnet adsorption rod 3, and the specifications of the positioning holes 51 in adjacent rows are different. In this way, at least 5 measurement samples can be prepared each time, and the positioning plate 5 can position tubular rivets 6 of different specifications and models, which is suitable for 4 specifications of tubular rivets 6, and when preparing measurement samples for different tubular rivets 6, the height of the magnet adsorption rod 3 only needs to be lowered.

[0024] In order to improve the stability of the translationally adjustable positioning plate 5, a guide groove is provided in the middle of the base plate 11 provided in the utility model, and a guide block slidingly matched with the guide groove is provided at the bottom of the positioning plate 5. The guide block can adopt a columnar structure or a Chinese-shaped structure, and it is only necessary to ensure that the guide block and the guide groove can move straight forward and backward.

[0025] In order to prevent friction, wear and extrusion deformation of the workpiece during sample preparation, the hardness and tensile strength of the bottom plate 11 and the inverted T-shaped frame 12 provided by the utility model are both smaller than those of the titanium-niobium alloy.

[0026] The above description is only a preferred embodiment of the present invention and does not limit the present invention in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes and apply it to other fields. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. A device for measuring the groove at the tail of a tubular rivet, comprising a base, characterized in that: The base includes a bottom plate and an inverted T-shaped frame arranged on both sides of the bottom plate, a strip-shaped main magnet is vertically arranged on the inner side of the inverted T-shaped frame, a magnet adsorption rod is arranged between the inverted T-shaped frames, both ends of the magnet adsorption rod are provided with a first magnet that cooperates with the main magnet, a plurality of second magnets distributed at intervals are arranged on the side of the magnet adsorption rod facing the bottom plate, a threaded rod is arranged on the adsorption side of the second magnet, a positioning plate for positioning the tubular rivet is arranged below the threaded rod, a plurality of positioning holes distributed in rows and columns are arranged on the positioning plate, and the positioning holes are countersunk structures with their heads facing downward.

2. A device for measuring the tail groove of a tubular rivet according to claim 1, characterized in that: The threaded rod is a T-shaped structure and its head cooperates with the second magnet, and the second magnet is a round pancake-shaped structure.

3. A device for measuring the groove at the tail of a tubular rivet according to claim 2, characterized in that: The rows and columns of the positioning holes are in a 5X4 formation, each row of positioning holes is parallel to the length direction of the magnet adsorption rod, and the specifications of the positioning holes in adjacent rows are different.

4. A device for measuring the groove at the tail of a tubular rivet according to claim 3, characterized in that: A guide groove is arranged in the middle of the bottom plate, and a guide block which is slidably matched with the guide groove is arranged at the bottom of the positioning plate.

5. A device for measuring the groove at the tail of a tubular rivet according to any one of claims 1 to 4, characterized in that: The hardness and tensile strength of the bottom plate and the inverted T-shaped frame are both less than those of the titanium-niobium alloy.

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