Aluminum alloy threaded sleeve

Abstract

According to the aluminum alloy threaded sleeve, the sleeve body is formed at a time through the cold heading technology, and the strength and durability of the aluminum alloy threaded sleeve are effectively guaranteed. And meanwhile, the structure of the sleeve body is more compact through the cold heading technology, and the corrosion resistance of the sleeve body is improved. And the sleeve structure with the body part and the limiting part is arranged, so that the stability of the sleeve is improved, and the mounting process is more convenient. The body part serves as a main supporting structure and bears main stress of the threaded sleeve. And the limiting part plays a role in positioning and limiting, so that the sleeve is ensured not to displace or rotate in the mounting process. And a large-diameter part and a small-diameter part are designed in the sleeve groove. The large-diameter part serves as a main threaded connection part, is reasonable in size design and can be tightly matched with other parts, and stable connection is achieved. Meanwhile, chamfer structures are arranged at the two ends of the large-diameter part 5, so that the friction force in the installation process can be reduced, and the installation difficulty is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of casing pipes, in particular to an aluminum alloy threaded casing pipe. Background Art

[0002] In the prior art, sleeves are usually formed by turning, but turning has the problems of high processing cost and low production efficiency. In order to solve these problems, the utility model provides a new type of aluminum alloy threaded sleeve, which is formed by cold heading in one step, which not only reduces the processing cost but also improves the production efficiency. Summary of the invention

[0003] In view of this, the utility model provides an aluminum alloy threaded casing.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] An aluminum alloy threaded sleeve comprises a sleeve body, which is formed in one step by cold heading of a mold. The sleeve body comprises a main body portion and a limiting portion. A sleeve groove penetrating the main body portion and the limiting portion is formed in the sleeve body. The sleeve groove comprises a large diameter portion and a small diameter portion. Chamfered structures are respectively arranged at both ends of the large diameter portion.

[0006] Preferably, the large diameter portion is arranged on a side of the small diameter portion away from the limiting portion, and the chamfer structure includes an inner chamfer structure arranged between the large diameter portion and the small diameter portion and an outer chamfer structure arranged at a notch on one side of the large diameter portion close to the sleeve groove.

[0007] Preferably, the chamfering directions of the inner chamfer structure and the outer chamfer structure are the same, and both the inner chamfer structure and the outer chamfer structure have corresponding chamfering inclined surfaces, and the inclination direction of the chamfering inclined surfaces is that the groove wall of the sleeve groove where the large diameter part is located is inclined toward the center of the small diameter part.

[0008] Preferably, the chamfer angles of the inner chamfer structure and the outer chamfer structure are both 25°.

[0009] Preferably, the outer diameter of the limiting portion is larger than the outer diameter of the main body, one end of the main body away from the limiting portion protrudes to form a positioning end, the outer diameter of the positioning end is smaller than the outer diameter of the main body, and the sleeve groove passes through the positioning end.

[0010] Preferably, the mold includes a punch die and a main mold, the sleeve body is fixed in the main mold, a punch rod is arranged on the punch die, one end of the punch rod extends into the sleeve body to punch the sleeve body, and a main mold ejector is arranged on the side of the main mold away from the punch die, and one end of the main mold ejector supports the end of the sleeve body away from the punch die.

[0011] Preferably, the sleeve body is made of 6082 aluminum alloy, and the sleeve body is formed by cold heading.

[0012] The beneficial effect of the utility model is that the strength and durability of the aluminum alloy threaded sleeve are effectively guaranteed by forming the sleeve body in one step by adopting the cold heading process. At the same time, the cold heading process also makes the structure of the sleeve body more compact and improves its corrosion resistance. The sleeve structure with a main body and a limiting part not only increases the stability of the sleeve, but also makes the installation process more convenient. The main body, as the main supporting structure, bears the main force of the threaded sleeve. The limiting part plays a role in positioning and limiting, ensuring that the sleeve will not be displaced or rotated during the installation process. A large diameter part and a small diameter part are designed in the sleeve groove. As the main threaded connection part, the large diameter part has a reasonable size design and can be closely matched with other parts to achieve a stable connection. At the same time, chamfered structures are also provided at both ends of the large diameter part 5. Such a design can reduce the friction during the installation process and reduce the difficulty of installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0014] Attached Figure 1 It is a schematic diagram of the structure of the utility model;

[0015] Attached Figure 2 This is a schematic diagram of the mold structure in the sixth cold heading process. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0017] The utility model will be further described below in conjunction with the accompanying drawings of the specification.

[0018] The utility model provides the following technical solutions:

[0019] As attached Figure 1As shown, the utility model discloses an aluminum alloy threaded sleeve, including a sleeve body 1, the sleeve body 1 is made of 6082 aluminum alloy, the sleeve body 1 is formed in one step by cold heading of a mold, the sleeve body 1 has a body part 2 and a limit part 3, a sleeve groove 4 penetrating the body part 2 and the limit part 3 is formed in the sleeve body 1, the sleeve groove 4 has a large diameter part 5 and a small diameter part 6, and chamfer structures are respectively arranged at both ends of the large diameter part 5. Specifically, in this design, the sleeve body 1 is formed in one step by cold heading process, which effectively ensures the strength and durability of the aluminum alloy threaded sleeve. At the same time, the cold heading process also makes the structure of the sleeve body 1 more compact and improves its corrosion resistance. The sleeve structure with the body part 2 and the limit part 3 not only increases the stability of the sleeve, but also makes the installation process more convenient. The body part 2 is the main supporting structure, bearing the main force of the threaded sleeve. The limit part 3 plays the role of positioning and limiting, ensuring that the sleeve will not be displaced or rotated during the installation process. A large diameter portion 5 and a small diameter portion 6 are designed in the sleeve groove 4. As the main threaded connection part, the large diameter portion 5 has a reasonable size design and can be closely matched with other components to achieve a stable connection. At the same time, chamfer structures are also set at both ends of the large diameter portion 5. Such a design can reduce friction during installation and reduce the difficulty of installation.

[0020] Further, the large diameter portion 5 is arranged on the side of the small diameter portion 6 away from the limiting portion 3, and the chamfer structure includes an inner chamfer structure 7 arranged between the large diameter portion 5 and the small diameter portion 6 and an outer chamfer structure 8 arranged at the notch of the large diameter portion 5 close to the sleeve groove 4. Specifically, in this embodiment, the layout design of the large diameter portion 5 and the small diameter portion 6 fully considers the convenience and safety of practical application. The large diameter portion 5 is arranged on the side of the small diameter portion 6 away from the limiting portion 3. Such a layout is conducive to the large diameter portion 5 being able to better cooperate with the corresponding threaded hole during threaded connection, reducing the possibility of misalignment and sliding. The design of the inner chamfer structure 7 is an important transition between the large diameter portion 5 and the small diameter portion 6. It can not only smoothly connect the two, but also play a guiding role during the installation process, so that the threaded sleeve can enter the corresponding threaded hole more easily. At the same time, the inner chamfer structure 7 can also effectively reduce the stress concentration generated during threaded connection and improve the reliability of the connection. The outer chamfer structure 8 is arranged at the notch of the large diameter portion 5 close to the sleeve groove 4, and its main function is to protect the edge of the threaded sleeve and prevent the edge from being damaged due to friction or collision during installation. In addition, the outer chamfer structure 8 can also reduce the friction force during installation to a certain extent, making it easier for the threaded sleeve to be inserted into the corresponding threaded hole.

[0021] Furthermore, the chamfering directions of the inner chamfer structure 7 and the outer chamfer structure 8 are the same, and both the inner chamfer structure 7 and the outer chamfer structure 8 have corresponding chamfered inclined surfaces 9, and the inclination direction of the chamfered inclined surfaces 9 is that the groove wall of the sleeve groove 4 where the large diameter portion 5 is located is inclined toward the center of the small diameter portion 6. Specifically, in this embodiment, the chamfering directions of the inner chamfer structure 7 and the outer chamfer structure 8 are the same, and such a design makes the transition of the entire sleeve groove 4 smoother, reduces the resistance during the installation process, and thus improves the installation efficiency. At the same time, both the inner chamfer structure 7 and the outer chamfer structure 8 have corresponding chamfered inclined surfaces 9. This design not only allows the sleeve to enter the corresponding threaded hole more smoothly when inserted, but also effectively disperses the stress generated by the installation, thereby improving the reliability of the connection.

[0022] Furthermore, the chamfer angles of the inner chamfer structure 7 and the outer chamfer structure 8 are both 25°.

[0023] Further, the outer diameter of the limiting portion 3 is larger than the outer diameter of the main body 2, and one end of the main body 2 away from the limiting portion 3 protrudes to form a positioning end 10, the outer diameter of the positioning end 10 is smaller than the outer diameter of the main body 2, and the sleeve groove 4 is set through the positioning end 10. Specifically, in this embodiment, the outer diameter of the limiting portion 3 is designed to be larger than the outer diameter of the main body 2. Such a design not only increases the overall stability of the sleeve, but also enables it to better cooperate with the installation hole or equipment during the installation process, playing a positioning role. At the same time, one end of the main body 2 away from the limiting portion 3 protrudes to form the positioning end 10. This design further enhances the positioning function of the sleeve, ensuring that no offset or rotation occurs during the installation process. The outer diameter of the positioning end 10 is smaller than the outer diameter of the main body 2. Such a design makes the positioning end 10 smoother when inserted into the installation hole, reducing the resistance during the installation process. The sleeve groove 4 is set through the positioning end 10. Such a layout makes the entire sleeve structure more reasonable and facilitates the threaded connection during the installation process.

[0024] Reference Figure 2Further, the mold includes a punch die 11 and a main die 12, the sleeve body 1 is fixed in the main die 12, a punch rod 13 is arranged on the punch die 11, one end of the punch rod 13 extends into the sleeve body 1 to punch the sleeve body 1, and a main die ejector pin 14 is arranged on the side of the main die 12 away from the punch die 11, and one end of the main die ejector pin 14 supports the end of the sleeve body 1 away from the punch die 11. Specifically, in this embodiment, the cold heading of the sleeve body 1 has 6 processes, each process has a corresponding punch die and main die, and the punch rod 13 arranged on the punch die 11 has the characteristics of high precision and high hardness, which ensures the precision and durability during the punching process. In the first process of cold heading, the punch rod 13 extends from one end of the sleeve body 1 to punch the inside to form the preliminary shape of the sleeve groove 4. The main mold 12 serves as the main part supporting the sleeve body 1. Its internal shape matches the outer shape of the sleeve body 1, ensuring the stability of the sleeve body 1 during the cold heading process. The main mold ejector pin 14 is arranged on the side of the main mold 12 away from the punching die 11, supporting the other end of the sleeve body 1 to prevent the sleeve body 1 from being deformed or damaged during the punching process. As the cold heading process proceeds, the punch 13 and the main mold ejector pin 14 will perform multiple cold headings on the sleeve body 1 according to the preset procedures and strengths, gradually forming the final sleeve shape. During the cold heading process, parameters such as the temperature of the mold, the speed and pressure of the punch will be precisely controlled to ensure the forming accuracy and physical properties of the aluminum alloy sleeve. A pad 15 is provided on the die 11 used in the third to sixth processes. The pad 15 is fixed to one end of the die 11 close to the sleeve body 1 by screws. During the operation of the die 11, the die is prevented from directly contacting the sleeve body 1, thereby reducing the wear and scratches on the sleeve body 1 and ensuring the smoothness and precision of the sleeve surface.

[0025] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An aluminum alloy threaded casing, characterized in that: The invention comprises a sleeve body which is formed in one step by cold heading of a mold, the sleeve body comprises a main body part and a limiting part, a sleeve groove which passes through the main body part and the limiting part is formed in the sleeve body, the sleeve groove comprises a large diameter part and a small diameter part, and chamfered structures are respectively arranged at both ends of the large diameter part.

2. The aluminum alloy threaded casing according to claim 1, characterized in that: The large diameter portion is arranged on a side of the small diameter portion away from the limiting portion, and the chamfer structure includes an inner chamfer structure arranged between the large diameter portion and the small diameter portion and an outer chamfer structure arranged at a notch on one side of the large diameter portion close to the sleeve groove.

3. The aluminum alloy threaded casing according to claim 2, characterized in that: The inner chamfer structure and the outer chamfer structure have the same chamfering direction, and both have corresponding chamfering inclined surfaces, and the inclination direction of the chamfering inclined surfaces is that the groove wall of the sleeve groove where the large diameter part is located is inclined toward the center of the small diameter part.

4. The aluminum alloy threaded casing according to claim 3, characterized in that: The chamfer angles of the inner chamfer structure and the outer chamfer structure are both 25°.

5. The aluminum alloy threaded casing according to claim 1, characterized in that: The outer diameter of the limiting part is larger than that of the main body, one end of the main body away from the limiting part protrudes to form a positioning end, the outer diameter of the positioning end is smaller than that of the main body, and the sleeve groove passes through the positioning end.

6. The aluminum alloy threaded casing according to claim 1, characterized in that: The mold includes a punch die and a main mold. The sleeve body is fixed in the main mold. A punch rod is arranged on the punch die. One end of the punch rod extends into the sleeve body to punch the sleeve body. A main mold ejector is arranged on the side of the main mold away from the punch die. One end of the main mold ejector supports the end of the sleeve body away from the punch die.

7. The aluminum alloy threaded casing according to claim 1, characterized in that: The sleeve body is made of 6082 aluminum alloy and is formed by cold heading.

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