CN216107093U - Nose top cap for cold strengthening of self-adaptive slotted bush - Google Patents

Abstract

The utility model belongs to the technical field of cold strengthening of a slotted liner, and particularly discloses a nose top cap for self-adaptive cold strengthening of a slotted liner, which comprises a shell and a limit nut arranged in the shell; the shell is movably connected with the limiting nut; the top end of the limiting nut is provided with a caliper; the calipers are equally divided into three-petal structures, and a limiting groove for inserting a core rod is formed in the center of each three-petal structure of the calipers; the calipers are sleeved with rubber rings and used for controlling the radial positions of the calipers; the shell is a bottomless hollow cylinder, and the top of the shell is provided with a through hole matched with the limiting groove. The utility model can make up the domestic blank in the aspect of the slotted bush cold extrusion mounting tool and is superior to an inlet piece in the aspects of practicability and operability.

Description

Nose top cap for cold strengthening of self-adaptive slotted bush

Technical Field

The utility model belongs to the technical field of cold strengthening of slotted bushes, and particularly relates to a nose top cap for self-adaptive cold strengthening of a slotted bush.

Background

At present, in the aviation industry, the fatigue life of a hole structure can be doubled by cold strengthening of a slotted bushing, and the slotted bushing is convenient to use and high in efficiency. However, the whole slotted liner cold strengthening system is monopolized by two companies of FTI and WCI abroad, and the slotted liner is developed by some enterprises at home, but the installation tool is still blank at home. The mounting tool comprises a pull gun, a pump station, a nose top cap, a core rod and the like, wherein the nose top cap is particularly important for mounting the slotted bushing, and at present, a foreign inlet piece (the structure is shown in figure 1) comprises a shell B, a core rod inlet A and a limiting groove C, the shell B and the core rod inlet A are integrally designed, and the limiting groove C is of a fixed size. The inlet piece presents at least the following problems:

(1) self-adaptive correction cannot be realized, and abnormity easily occurs in the installation process;

(2) the maintainability is poor, and once the whole structure is damaged, the whole structure is scrapped, so that the economical efficiency is low;

(3) the compatibility of the product interface is poor, and the nose top cap of one type can only be provided with the slotted bushing of the corresponding type.

Accordingly, it would be an urgent need in the art to provide a new adaptive split-liner nose cap for cold strengthening.

SUMMERY OF THE UTILITY MODEL

The present invention aims to solve the following problems: (1) filling the blank of the domestic slotted bush mounting tool; (2) the nose top cap improves the defects existing in the foreign nose top cap.

The utility model provides a self-adaptive slotted bushing cold strengthening nose top cap, which comprises a shell 1 with a cavity; a limit nut 4 is arranged in the cavity;

the shell 1 is movably connected with the limiting nut 4;

the top end of the limiting nut 4 is provided with a caliper 4;

the calipers 4 are formed by enclosing a plurality of clamping flaps, and a limiting groove for inserting a core rod is formed in the center of each clamping flap;

a rubber ring 2 is sleeved outside the caliper 4 and used for controlling the radial position of the caliper 4;

the shell 1 is a bottomless hollow cylinder, and a through hole matched with the limiting groove is formed in the top of the shell 1.

The further scheme is that an inner thread is formed on the inner wall of the shell 1, and an outer thread matched with the inner thread is formed on the side face of the limiting nut 4.

In a further aspect, the number of said locking flaps is at least 3.

In a further scheme, the shell 1 is a bottomless hollow cylinder.

In a further scheme, a groove is formed in the outer wall of the caliper 4 and used for sleeving the rubber ring 2.

Compared with the prior art, the utility model has the beneficial effects that:

(1) the utility model can make up the domestic blank in the aspect of the slotted bush cold extrusion mounting tool and is superior to an inlet piece in the aspects of practicability and operability.

(2) The calipers are of a three-piece structure, and the rubber rings are wound on the calipers, so that the nose cap of one specification can be simultaneously compatible with the installation of products of similar specifications of multiple companies; the three-lobe structure has the function of self-adaptive centering and aligning, and can achieve better safety and operability.

(3) The caliper is detachably connected with the shell, when quick-wear parts such as the caliper are damaged, the damaged parts can be replaced independently, and the economical efficiency and the maintainability are greatly improved.

(4) The position of the caliper can be adjusted through the limiting nut, so that the application range of the mandrel and the pull gun under different working conditions is widened.

Drawings

The utility model is illustrated and described only by way of example and not by way of limitation in the scope of the utility model as set forth in the following drawings, in which:

FIG. 1: the nose top cap structure in the prior art;

FIG. 2: the utility model has a schematic structure;

FIG. 3: the utility model has a schematic internal structure;

FIG. 4: a slotted liner cold extrusion schematic view;

FIG. 5: the axle center of the caliper is adjusted schematically;

FIG. 6: the caliper changes along with the size of the inserted mandrel;

FIG. 7: a caliper position adjustment schematic diagram;

in the figure: the gun comprises a shell 1, a rubber ring 2, calipers 3, a limiting nut 4, a nose top cap 5, a core rod 6, a slotted bushing 7, a mounting plate 8, a seat ring 9, a threaded adapter 10, a gun sleeve 11 and a gun piston rod 12.

Detailed Description

In order to make the objects, technical solutions, design methods, and advantages of the present invention more apparent, the present invention will be further described in detail by specific embodiments with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.

As shown in fig. 2-3, the utility model provides a nose cap for cold strengthening of a self-adaptive slotted bushing, which comprises a shell 1 and a limit nut 4 arranged inside the shell 1;

the shell 1 is movably connected with the limiting nut 4;

the top end of the limiting nut 4 is provided with a caliper 4;

the calipers 4 are equally divided into three-petal structures, and a limit groove for inserting a core rod is formed in the center of each three-petal structure of the calipers 4;

the calipers 4 are sleeved with rubber rings 2 and used for controlling the radial positions of the calipers 4;

the shell 1 is a bottomless hollow cylinder, and a through hole matched with the limiting groove is formed in the top of the shell 1.

Specifically, an internal thread is formed on the inner wall of the shell 1, an external thread adapted to the internal thread is formed on the side surface of the limit nut 4, and the limit nut 4 is in threaded connection with the shell 1.

As shown in fig. 4, the process of using the present invention is: the nose top cap 5 of the utility model is abutted against one side of a mounting plate 8, a seat ring 9 is arranged on the mounting plate 8 in advance, a slotted bush 7 is sleeved on a core rod 6, the core rod 6 is inserted into a limit groove enclosed by a caliper 3, the tail end of the core rod 6 is in threaded connection with a piston rod 12 of a drawing gun through a threaded adapter 10, the core rod 6 provides a pulling force to move rightwards through the drawing gun, the working end of the core rod 6 extrudes the slotted bush to leave beneficial residual stress at the hole position of the mounting plate 8, thereby prolonging the fatigue life of the mounting plate 8. Because the interference magnitude of cold extrusion is great, draw the rifle to provide very big pulling force for guaranteeing that whole cold extrusion process is accomplished smoothly. And the core rod 6, the nose top cap 5, the mounting plate 8, the seat ring 9 and the gun pulling piston rod 12 are required to be on the same axis.

As shown in fig. 5, since the caliper 3 has a three-flap structure, when the core rod is inserted into the limiting groove, the three-flap structure has a self-adaptive centering function, so that the safety and operability can be better.

As shown in fig. 6, when the mandrel is inserted into the caliper 3, the caliper 3 can adjust the diameter of the limiting groove according to mandrels of different specifications, and can adapt to the installation of products of different specifications.

As shown in figure 7, the position of the caliper can be adjusted through the limiting nut, so that the application range of the caliper to different working conditions and core rods and pull guns is improved.

Having described embodiments of the present invention, the foregoing description is intended to be exemplary, not exhaustive, and not limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen in order to best explain the principles of the embodiments, the practical application, or improvements made to the technology in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.

Claims (4)

1. A nose cap for cold strengthening of a self-adaptive slotted liner is characterized by comprising a shell (1) containing a cavity; a limit nut (4) is arranged in the cavity;

the shell (1) is movably connected with the limiting nut (4);

the top end of the limiting nut (4) is provided with a caliper (3);

the calipers (3) are formed by enclosing a plurality of clamping flaps, and a limiting groove for inserting a core rod is formed in the center of each clamping flap;

a rubber ring (2) is sleeved outside the caliper (3) and used for controlling the radial position of the caliper (3);

the shell (1) is a bottomless hollow cylinder, and a through hole matched with the limiting groove is formed in the top of the shell (1).

2. The nose cap for the cold strengthening of the self-adaptive slotted bushing according to claim 1, wherein an inner thread is formed on the inner wall of the shell (1), and an outer thread adapted to the inner thread is formed on the side surface of the limit nut (4).

3. The adaptive split-liner nose cap for cold strengthening of a bushing as recited in claim 1, wherein said snap flaps are at least 3.

4. The nose cap for the cold strengthening of the self-adaptive slotted liner bushing according to claim 1, wherein the outer wall of the caliper (3) is provided with a groove for sleeving the rubber ring (2).

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