Tubular rivet mounting tool

Abstract

The utility model belongs to the field of aviation high-end rivets, and provides a tubular rivet mounting tool which comprises a mounting head, a clamping handle is arranged at the tail of the mounting head, the hardness of the mounting head and the hardness of the clamping handle are 2-7 times that of a tubular rivet, at least two sections of guide surfaces are arranged at the head of the mounting head, and the guide surfaces are arranged on the mounting head. The guide molding surface is used for being matched with a tail hole of the tubular rivet, and the diameter of the guide molding surface is gradually increased from the head end to the tail end of the guide molding surface. The clamping handle is matched with the riveter, the head end of the tubular rivet and the clamping handle end apply pressure in the opposite directions under the action of the guide surface, stress on a tail hole does not change suddenly, deformation is sufficient, the tubular rivet after being pressed and riveted has good precision and attractiveness, the design is reasonable, the structure is simple, and the production cost is low. The device can also be used for flaring a test piece in a flaring experiment, and is suitable for large-scale popularization.

Description

Technical Field

[0001] The utility model belongs to the field of aviation high-end rivets, and in particular relates to a tubular rivet installation tool. Background Art

[0002] In the field of aerospace, titanium-niobium tubular rivets are high-end rivets, and aircraft manufacturers need a large number of titanium-niobium tubular rivets. Generally, titanium-niobium tubular rivets include the general features of tubular rivets, such as a rivet for electronic connectors or plug-in power supply components disclosed in the existing patent CN201368100Y, which includes a head, a body and a tail hole.

[0003] At present, since aviation tubular rivets are made of titanium-niobium materials and their tail holes are tapered, they are not only difficult to manufacture, but also have higher installation accuracy requirements than general rivets. If general installation tools are used, the installation accuracy cannot be achieved, and the rivets after pressure riveting have poor aesthetics, which may even affect the service life of the tubular rivets. Utility Model Content

[0004] The utility model aims at solving the technical problems existing in the installation of the titanium-niobium tubular rivets and proposes a tubular rivet installation tool which has a reasonable design, a simple structure and is conducive to improving the installation efficiency and aesthetics.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is that the utility model provides a tubular rivet installation tool, including an installation head, a clamping handle is provided at the tail of the installation head, the hardness of the installation head and the clamping handle is 2-7 times the hardness of the tubular rivet, and the head of the installation head is provided with at least 2 sections of guide surfaces, the guide surfaces are used to cooperate with the tail hole of the tubular rivet, and the diameter of the guide surfaces gradually increases from its head end to the tail end.

[0006] Preferably, the number of the guide profiles is 2 and they include a leading guide profile and a trailing guide profile, the generatrix of the leading guide profile is an arc, and the trailing guide profile is a conical surface.

[0007] Preferably, the relationship between the radius R of the arc and the main body diameter D of the tubular rivet is: 0.8D<R<1.6D; the relationship between the front end diameter A of the leading profile and the small bottom diameter E of the tail hole of the tubular rivet is: 0.5E<A<E; the relationship between the axial height B of the leading profile and the main body diameter D of the tubular rivet is: 0.2D<B<0.7D; the relationship between the diameter C of the leading profile connecting the rear guide surface and the main body diameter D of the tubular rivet is: 2D<C<2.5D; the relationship between the cone angle α of the rear guide surface and the cone angle β of the tail hole is: (90°-β)<α<(90°+β).

[0008] Preferably, the number of the guide profile surfaces is 4 and they include a first guide profile surface, a second guide profile surface, a third guide profile surface and a fourth guide profile surface which are arranged in a front-to-back order.

[0009] Preferably, the relationship between the front end diameter H of the first guide profile and the small bottom diameter F of the tail hole of the tubular rivet is: 0.5F<H<F; the relationship between the sum of the axial height I of the first guide profile, the axial height J of the second guide profile and the axial height K of the third guide profile and the main body diameter G of the tubular rivet is: 0.2G<(I+J+K)<0.7G; the ratio of the axial height I of the first guide profile, the axial height J of the second guide profile and the axial height K of the third guide profile is 0.35:0. 20:0.45; the relationship between the diameter M of the third guide surface connecting the fourth guide surface and the main body diameter G of the tubular rivet is: 2G<M<2.5G; the relationship between the taper angle γ of the first guide surface and the taper angle θ of the tail hole of the tubular rivet is: 16 / 3×θ<γ<20 / 3×θ; the relationship between the taper angle δ of the second guide surface and the taper angle θ of the tail hole is: 20 / 3×θ<δ<8θ; the relationship between the taper angle β of the third guide surface and the taper angle ε of the tail hole of the tubular rivet is: 8θ<ε<28 / 3×θ.

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

[0011] 1. The utility model provides a tubular rivet installation tool, which has a harderness greater than that of the tubular rivet, so that it will not be obviously deformed during the process of riveting the tubular rivet, which is conducive to ensuring that it has a long service life; the clamping handle cooperates with the rivet gun, and the special design of the guide surface at the front end of the installation head makes it possible for the head end of the tubular rivet and the clamping handle end to apply pressure in relative directions, so that the tail hole is subjected to force without sudden changes and is fully deformed. The tubular rivet after riveting has good precision and aesthetics, and the design is reasonable and the structure is simple. It can also be used to expand the test piece in the expansion experiment, 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 is a schematic structural diagram of a tubular rivet installation tool provided in Example 1;

[0014] Figure 2 is a schematic diagram of a tubular rivet that cooperates with a tubular rivet installation tool provided in Example 1;

[0015] Figure 3 is a schematic structural diagram of a tubular rivet installation tool provided in Example 2;

[0016] Figure 4 is a schematic diagram of a tubular rivet used in conjunction with a tubular rivet installation tool provided in Example 2;

[0017] In the above figures, 1, mounting head; 2, clamping handle; 3, guide surface; 4, tubular rivet; 41, tail hole. 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] Embodiment 1, as Figures 1-2 As shown, the utility model provides a tubular rivet installation tool, including an installation head 1, a clamping handle 2 is provided at the tail of the installation head 1, the hardness of the installation head 1 and the clamping handle 2 is 2-7 times the hardness of the tubular rivet 4, and the head of the installation head 1 is provided with at least two sections of guide surfaces 3, the guide surfaces 3 are used to cooperate with the tail hole 41 of the tubular rivet 4, and the diameter of the guide surface 3 gradually increases from its head end to the tail end. The hardness of the mounting head 1 and the clamping handle 2 is greater than that of the tubular rivet 4, so that there will be no obvious deformation during the process of riveting the tubular rivet 4, which is conducive to ensuring that it has a long service life; the clamping handle 2 cooperates with the rivet gun to apply pressure in relative directions from the head end of the tubular rivet 4 and the end of the clamping handle 2, so that the guide surface 3 and the tail hole 41 of the tubular rivet 4 can have a better transition to achieve compression deformation. In this process, the tail hole is subjected to no sudden force and is fully deformed, and the tubular rivet 4 after riveting has better precision, relatively uniform deformation characteristics, and better aesthetics.

[0021] Specifically, the number of guide profiles 3 is 2 and includes a leading guide profile 3 and a trailing guide profile 3, the generatrix of the leading guide profile 3 is an arc, and the trailing guide profile 3 is a cone. The leading guide profile 3 can be kept at the front end center of the tail hole 41 of the tubular rivet 4 when the riveting operation is finally finalized, so as to prevent the tubular rivet 4 from having a large deviation in coaxiality with the mounting head 1 and prevent it from exceeding the allowable error range, and at the same time, it is also conducive to ensuring the aesthetics of the tubular rivet 4 after riveting. The trailing guide profile 3 plays a major role in expanding the opening, and can make the tail hole 41 finally produce an expanded shape that meets the design requirements.

[0022] More specifically, the relationship between the radius R of the arc in this embodiment and the main body diameter D of the tubular rivet 4 is: 0.8D<R<1.6D; the relationship between the front end diameter A of the leading profile and the small bottom diameter E of the tail hole 41 of the tubular rivet 4 is: 0.5E<A<E; the relationship between the axial height B of the leading profile and the main body diameter D of the tubular rivet 4 is: 0.2D<B<0.7D; the relationship between the diameter C of the leading profile connecting the rear guide surface and the main body diameter D of the tubular rivet 4 is: 2D<C<2.5D; the relationship between the cone angle α of the rear guide surface and the cone angle β of the tail hole 41 is: (90°-β)<α<(90°+β). By designing the leading profile 3 and the rear guide profile 3 to establish a mathematical relationship with the size of the tail hole 41, the final formed compression rivet can have a better controllable shape, which not only meets the pressure riveting accuracy requirements, but also ensures better aesthetics.

[0023] Embodiment 2, as Figures 1-2 As shown, the utility model provides a tubular rivet 4 installation tool, the number of the guide surfaces 3 is 4 and it includes a first guide surface 3, a second guide surface 3, a third guide surface 3 and a fourth guide surface 3 distributed front and back. Specifically, the relationship between the front end diameter H of the first guide surface 3 and the small bottom diameter F of the tail hole 41 of the tubular rivet 4 is: 0.5F<H<F; the relationship between the sum of the axial height I of the first guide surface 3, the axial height J of the second guide surface 3 and the axial height K of the third guide surface 3 and the main body diameter G of the tubular rivet 4 is: 0.2G<(I+J+K)<0.7G; the ratio of the axial height I of the first guide surface 3, the axial height J of the second guide surface 3 and the axial height K of the third guide surface 3 is 0.35:0.2 0:0.45; the relationship between the diameter M of the third guide surface 3 connecting the fourth guide surface 3 and the main body diameter G of the tubular rivet 4 is: 2G<M<2.5G; the relationship between the cone angle γ of the first guide surface 3 and the cone angle θ of the tail hole 41 of the tubular rivet 4 is: 16 / 3×θ<γ<20 / 3×θ; the relationship between the cone angle δ of the second guide surface 3 and the cone angle θ of the tail hole 41 is: 20 / 3×θ<δ<8θ; the relationship between the cone angle β of the third guide surface 3 and the cone angle ε of the tail hole 41 of the tubular rivet 4 is: 8θ<ε<28 / 3×θ.

[0024] This embodiment adopts 4 sections of guide surfaces 3, and establishes a reasonable mathematical relationship for the 4 sections of guide surfaces 3, so that the expansion process can complete a better transition between the third guide surface 3 and the fourth guide surface 3 of the tail hole 41, and the tail hole 41 can be expanded more smoothly and smoothly while ensuring the complete shape of the tail hole 41, reducing stress drastic changes, and the first guide surface 3 and the second guide surface 3 are also involved in the pressing process at the end, so that the formed riveting mouth maintains relatively uniform physical characteristics, thereby better controlling the riveting accuracy and improving the riveting quality.

[0025] 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 tubular rivet installation tool, comprising an installation head, wherein a clamping handle is provided at the tail of the installation head, wherein: The hardness of the installation head and the clamping handle is 2-7 times that of the tubular rivet. The head of the installation head is provided with at least two sections of guide surfaces, which are used to cooperate with the tail hole of the tubular rivet. The diameter of the guide surface gradually increases from the head end to the tail end.

2. A tubular rivet installation tool according to claim 1, characterized in that: The number of the guide profiles is 2 and they include a leading guide profile and a trailing guide profile, the generatrix of the leading guide profile is an arc line, and the trailing guide profile is a conical surface.

3. A tubular rivet installation tool according to claim 2, characterized in that: The relationship between the radius R of the arc and the main body diameter D of the tubular rivet is: 0.8D<R<1.6D; the relationship between the front end diameter A of the leading profile and the small bottom diameter E of the tail hole of the tubular rivet is: 0.5E<A<E; the relationship between the axial height B of the leading profile and the main body diameter D of the tubular rivet is: 0.2D<B<0.7D; the relationship between the diameter C of the leading profile connecting the rear guide surface and the main body diameter D of the tubular rivet is: 2D<C<2.5D; the relationship between the cone angle α of the rear guide surface and the cone angle β of the tail hole is: (90°-β)<α<(90°+β).

4. A tubular rivet installation tool according to claim 1, characterized in that: The number of the guide profiles is 4 and they include a first guide profile, a second guide profile, a third guide profile and a fourth guide profile that are arranged in a front-to-back order.

5. A tubular rivet installation tool according to claim 4, characterized in that: The relationship between the front end diameter H of the first guide profile and the small bottom diameter F of the tail hole of the tubular rivet is: 0.5F<H<F; the relationship between the sum of the axial height I of the first guide profile, the axial height J of the second guide profile and the axial height K of the third guide profile and the main body diameter G of the tubular rivet is: 0.2G<(I+J+K)<0.7G; the ratio of the axial height I of the first guide profile, the axial height J of the second guide profile and the axial height K of the third guide profile is 0.35:0.20: 0.45; the relationship between the diameter M of the third guide surface connecting the fourth guide surface and the main body diameter G of the tubular rivet is: 2G<M<2.5G; the relationship between the taper angle γ of the first guide surface and the taper angle θ of the tail hole of the tubular rivet is: 16 / 3×θ<γ<20 / 3×θ; the relationship between the taper angle δ of the second guide surface and the taper angle θ of the tail hole is: 20 / 3×θ<δ<8θ; the relationship between the taper angle β of the third guide surface and the taper angle ε of the tail hole of the tubular rivet is: 8θ<ε<28 / 3×θ.

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