Inner core formed by drawing aluminum alloy pipe

Abstract

The utility model discloses an inner core for drawing forming of an aluminum alloy pipe, and particularly relates to the technical field of inner cores, the inner core comprises an inner core main body, and a movable assembly used for reducing the friction coefficient is arranged outside the inner core main body; the movable assembly comprises two supporting rings, the two supporting rings are arranged on the two sides of the inner core body in a sleeving mode respectively, a plurality of embedding grooves are formed in the sides, away from each other, of the two supporting rings, a ball capable of rotating freely is arranged in each embedding groove, and the diameter of an opening of each embedding groove is smaller than that of the corresponding ball. According to the utility model, the plurality of balls on the support ring are in contact with the pipe blank, the inner core main body can be limited to the center of the pipe blank, and the diameters of the openings of the embedding grooves are smaller than those of the balls, so that the balls can rotate in the embedding grooves and are not separated from the embedding grooves, and the friction can be reduced by reducing the contact surface; therefore, the condition of scratching and sticking aluminum can be effectively avoided, and the use stability of the inner core main body is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of inner cores, in particular to an inner core formed by drawing an aluminum alloy pipe. Background Art

[0002] The inner core of aluminum alloy tube drawing is an important tool component specially used in the aluminum alloy tube drawing process. Its main function is to support the inside of the tube when the tube is drawn, helping the tube to maintain shape and dimensional accuracy while reducing scratches and other surface defects.

[0003] The inner core of the aluminum alloy tube drawing process, through its carefully designed structure and technical characteristics, not only solves many problems in the traditional drawing process, but also significantly improves production efficiency and product quality, bringing considerable economic benefits to the enterprise.

[0004] As shown in the application document with the prior art publication number CN214321328U, it includes a drawing part and a connecting part fixedly connected thereto, a working belt is provided at the part with the largest diameter of the drawing part, an internal threaded connection is provided inside the end of the connecting part away from the drawing part, an oil chamber is provided at the end close to the working belt, a supporting part is provided on the outer periphery of the connecting part, and the supporting part is at the part with the largest diameter of the inner core; a truncated cone-shaped pre-lubrication head is fixedly provided at the end of the drawing part away from the connecting part; a through hole is opened along the central axis of the inner core, one end of the through hole is connected to the oil chamber, and the other end passes through the drawing part and the pre-lubrication head; the deformation cone angle of the inner mold is θ=12±1°; this technical solution effectively reduces the problem of inner hole scratches caused by aluminum sticking to the inner core, reduces the friction resistance when the casing is used, and is conducive to improving product quality.

[0005] However, the support portion in the above technical solution is still in surface contact with the tube blank, resulting in a larger contact surface between the inner core and the tube blank, which cannot effectively reduce the friction coefficient, thereby affecting the use effect and operational convenience of the technical solution. Utility Model Content

[0006] In order to overcome the above-mentioned defects of the prior art, the utility model provides an inner core formed by drawing an aluminum alloy tube. Through the contact between multiple spheres on the support ring and the tube blank, the main body of the inner core can be limited to the center of the tube blank. Because the opening diameter of the engaging groove is smaller than the diameter of the sphere, the sphere can rotate inside the engaging groove without leaving the engaging groove. Therefore, friction can be reduced by reducing the contact surface, thereby effectively avoiding scratches and sticking to the aluminum, ensuring the stability of the inner core main body, and solving the problems arising from the above-mentioned background technology.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an inner core formed by drawing an aluminum alloy tube, comprising an inner core body, wherein a movable component for reducing the friction coefficient is provided on the outside of the inner core body;

[0008] The movable assembly includes two support rings, which are respectively sleeved on both sides of the inner core body. A plurality of engaging grooves are provided on the two support rings on the sides away from each other. A freely rotatable ball is provided inside each engaging groove. The inner core body can be limited to the center of the tube blank by contact between the plurality of balls on the support rings and the tube blank. Since the opening diameter of the engaging groove is smaller than the diameter of the ball, the ball can rotate inside the engaging groove without leaving the engaging groove, thereby reducing friction by reducing the contact surface.

[0009] The opening diameter of the fitting groove is smaller than the diameter of the sphere. By setting the opening diameter of the fitting groove smaller than the diameter of the sphere, the fitting groove can limit the sphere and enable the sphere to rotate freely inside the fitting groove.

[0010] In a preferred embodiment, fixing parts are provided on the rear sides of the top ends and the bottom ends of the two support rings. The fixing parts are installed on the outside of the inner core body. Two fixing holes are provided on the side of the fixing parts away from the two support rings. Through the provision of the fixing parts, it is convenient for the staff to subsequently limit and fix the support rings with the help of fixing bolts to ensure the connection stability between the support rings and the inner core body.

[0011] In a preferred embodiment, positioning members are provided on the front sides of the top ends and the bottom ends of the two support rings. The positioning members are installed on the outside of the inner core body. A positioning groove is provided on one side of the positioning member corresponding to the fixing hole. The setting of the positioning groove on the positioning member can facilitate the fixing and limiting of the fixing bolts, thereby ensuring the stability of the fixing bolts in fixing the support rings.

[0012] In a preferred embodiment, two fixing bolts are provided on the side of the fixing member away from the two support rings, the fixing bolts penetrate the support rings and extend into the corresponding positioning grooves, the fixing bolts are threadedly connected to the positioning grooves, and the threaded connection between the fixing bolts and the positioning grooves can facilitate the fixing and limiting of the support rings to ensure the stability of the support rings.

[0013] In a preferred embodiment, the multiple interlocking grooves are evenly spaced apart. The arrangement of the multiple interlocking grooves allows the sphere to be installed in multiple directions, thereby providing multi-directional support and positioning for the inner core body, thereby ensuring the operational stability of the inner core body.

[0014] Technical effects and advantages of the utility model:

[0015] 1. Through the contact between the multiple balls on the support ring and the tube blank, the inner core body can be limited to the center of the tube blank. Because the opening diameter of the fitting groove is smaller than the diameter of the ball, the ball can rotate inside the fitting groove without leaving the fitting groove. Therefore, the friction can be reduced by reducing the contact surface, thereby effectively avoiding scratching and sticking aluminum, and ensuring the stability of the inner core body;

[0016] 2. The support ring is installed and fixed by fixing bolts, which can ensure the stability of the support ring when connected to the inner core body. At the same time, it is also convenient for the staff to dismantle the fixing bolts to remove the support ring for maintenance, thereby improving the convenience of the staff to disassemble and install the support ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 This is a rear view of the inner core body of the utility model;

[0019] Figure 3 This is a rear view of the support ring of the utility model;

[0020] Figure 4 This is an exploded view of the support ring of the utility model;

[0021] Figure 5 It is a top sectional view of the support ring of the utility model.

[0022] The accompanying drawings are marked as follows: 1. inner core body; 2. support ring; 3. fitting groove; 4. sphere; 5. fixing piece; 6. fixing hole; 7. positioning piece; 8. positioning groove; 9. fixing bolt. DETAILED DESCRIPTION

[0023] 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.

[0024] Refer to the instruction manual Figure 1-5 The utility model provides an inner core formed by drawing an aluminum alloy tube, comprising an inner core body 1, wherein the outer portion of the inner core body 1 is provided with a movable component for reducing the friction coefficient;

[0025] In order to ensure the stability of the inner core body 1 during movement and to prevent the processing influence caused by excessive friction, Figure 1-5 As shown, the movable component includes two support rings 2, which are respectively sleeved on both sides of the inner core body 1. A plurality of engaging grooves 3 are provided on the sides of the two support rings 2 that are away from each other. A freely rotatable sphere 4 is provided inside each engaging groove 3. The opening diameter of the engaging groove 3 is smaller than the diameter of the sphere 4. By setting the opening diameter of the engaging groove 3 to be smaller than the diameter of the sphere 4, the engaging groove 3 can limit the sphere 4 and enable the sphere 4 to rotate freely inside the engaging groove 3.

[0026] Specifically, through the contact between the multiple balls 4 on the support ring 2 and the tube blank, the inner core body 1 can be limited to the center of the tube blank. Because the opening diameter of the fitting groove 3 is smaller than the diameter of the ball 4, the ball 4 can rotate inside the fitting groove 3 without leaving the fitting groove, thereby reducing friction by reducing the contact surface.

[0027] In order to facilitate the installation and fixation of the support ring 2 and ensure the structural stability of the support ring, Figure 2-4 As shown, fixing parts 5 are provided on the rear sides of the top ends and the bottom ends of the two support rings 2. The fixing parts 5 are installed on the outside of the inner core body 1. Two fixing holes 6 are provided on the side of the fixing parts 5 away from the two support rings 2. Through the provision of the fixing parts 5, it is convenient for the staff to subsequently limit and fix the support rings 2 with the help of fixing bolts 9 to ensure the connection stability between the support rings 2 and the inner core body 1.

[0028] In order to facilitate the installation and fixing of the fixing bolt 9 and prevent the fixing bolt 9 from loosening, Figure 1 and 4 As shown, the two support rings 2 are provided with positioning members 7 on the front sides of the top ends and the front sides of the bottom ends. The positioning members 7 are installed on the outside of the inner core body 1. A positioning groove 8 is provided on one side of the positioning member 7 corresponding to the fixing hole 6. Through the setting of the positioning groove 8 on the positioning member 7, it is convenient to fix and limit the fixing bolt 9, thereby ensuring the stability of the fixing bolt 9 in fixing the support ring 2.

[0029] In order to facilitate the fixed installation of the support ring 2, it is also convenient to disassemble the support ring 2 later. Figure 3 and 4 As shown, two fixing bolts 9 are provided on the side of the fixing member 5 away from the two support rings 2. The fixing bolts 9 penetrate the support ring 2 and extend to the corresponding positioning groove 8. The fixing bolts 9 are threadedly connected to the positioning groove 8. Through the threaded connection between the fixing bolts 9 and the positioning groove 8, the support ring 2 can be easily fixed and limited to ensure the stability of the support ring 2.

[0030] Improve the limiting support effect of the support ring 2, such as Figure 1-5 As shown, the multiple interlocking grooves 3 are evenly spaced apart. The arrangement of the multiple interlocking grooves 3 allows the sphere 4 to be installed in multiple directions, thereby providing multi-directional support and positioning for the inner core body 1 to ensure operational stability of the inner core body 1.

[0031] First, the staff places the inner core body inside the tube blank, and then the inner core body 1 can be limitedly supported by the contact between the multiple balls 4 on the support ring 2 and the inner wall of the tube blank, ensuring that the inner core body 1 is in the center of the tube blank, thereby ensuring the stability of the staff when operating the inner core body and avoiding deviation and skewing;

[0032] Because the opening diameter of the fitting groove 3 is smaller than the diameter of the sphere 4, the sphere 4 can rotate inside the fitting groove 3 without leaving the fitting groove 3, so that the sphere 4 can roll in contact with the inner wall of the tube blank, thereby reducing the contact surface to reduce friction, thereby effectively avoiding scratches and sticking to the aluminum.

[0033] Finally: The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present utility model should be included in the protection scope of the present utility model.

Claims

1. An inner core formed by drawing an aluminum alloy tube, characterized in that: It comprises an inner core body (1), wherein a movable component for reducing the friction coefficient is provided on the outside of the inner core body (1); The movable component comprises two support rings (2), the two support rings (2) are respectively sleeved on both sides of the inner core body (1), a plurality of engaging grooves (3) are provided on the sides of the two support rings (2) which are away from each other, and a freely rotatable ball (4) is provided inside each engaging groove (3); The opening diameter of the engaging groove (3) is smaller than the diameter of the sphere (4).

2. The inner core formed by drawing an aluminum alloy tube according to claim 1, characterized in that: The two support rings (2) are provided with fixing parts (5) at the rear sides of the top ends and the bottom ends. The fixing parts (5) are installed outside the inner core body (1). Two fixing holes (6) are provided on the side of the fixing parts (5) away from the two support rings (2).

3. The inner core formed by drawing an aluminum alloy tube according to claim 2, characterized in that: The two support rings (2) are provided with positioning pieces (7) at the front sides of the top ends and the bottom ends. The positioning pieces (7) are installed outside the inner core body (1). A positioning groove (8) is provided on one side of the positioning piece (7) corresponding to the fixing hole (6).

4. The inner core formed by drawing an aluminum alloy tube according to claim 3, characterized in that: Two fixing bolts (9) are provided on a side of the fixing member (5) away from the two supporting rings (2); the fixing bolts (9) penetrate the supporting rings (2) and extend into the corresponding positioning grooves (8); the fixing bolts (9) are threadedly connected to the positioning grooves (8).

5. The inner core formed by drawing an aluminum alloy tube according to claim 1, characterized in that: The plurality of engaging grooves (3) are evenly spaced apart.

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