Combined punch for roller forming

Abstract

The utility model relates to the technical field of stamping dies, in particular to a combined punch for roller forming, which comprises a punch base body and a punch core, a cavity for mounting the punch core is arranged on one side wall of the punch base body, a discharge hole is arranged in the punch base body, one end of the discharge hole is communicated with the cavity, and a discharge air tap is arranged at the other end of the discharge hole. The discharging hole is filled with high-pressure gas after the end portion of the roller is punched through the discharging air nozzle, pressure is applied to the roller to complete separation of the roller from the punch base body, and compared with a traditional mode that a caliper is used for taking materials, contact with the side wall of the roller can be avoided, the scratching phenomenon is avoided, and the product quality is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of stamping dies, and particularly relates to a combined punch for roller forming. Background Art

[0002] In the metal processing industry, roller forming is a crucial process, which is widely used in bearings, transmission devices and various mechanical equipment. The quality of roller forming directly affects the performance and service life of products. However, in the existing roller forming process, a long-existing problem is that the roller is prone to adhesion to the punch after forming, which not only increases the difficulty of unloading, but also may cause damage to the surface of the roller, thereby affecting the overall quality of the product.

[0003] Traditional roller forming punch designs often focus on forming efficiency and accuracy, but there are obvious deficiencies in the unloading process. When the roller is formed under high temperature and high pressure, its surface often has high adhesiveness and is prone to closely adhere to the punch surface, forming adhesion. To solve this problem, many manufacturers use mechanical clamps for forced unloading, but this method often causes scratches or indentations on the roller surface, seriously affecting the appearance and performance of the product.

[0004] In addition, the traditional roller forming punch also has limitations in its structural design. Due to the large contact area between the punch and the roller and the lack of an effective auxiliary unloading mechanism, a large external force is required to separate the roller from the punch during the unloading process. This not only increases the energy consumption and wear of the equipment, but also reduces the production efficiency. Summary of the Utility Model

[0005] To solve the above problems, the embodiment of the utility model provides a combined punch for roller forming that is convenient for unloading and does not damage the outer surface of the roller.

[0006] The embodiment of the utility model specifically adopts the following technical solutions to achieve the above purpose: A combined punch for roller forming, comprising a punch base body and a punch core. A cavity for installing the punch core is provided on one side wall of the punch base body. A discharge hole is provided in the punch base body. One end of the discharge hole is communicated with the cavity, and the other end is provided with a discharge air nozzle.

[0007] As a further improvement of the above technical solution:

[0008] A positioning plate is provided in the middle of the discharge air nozzle, and a concave platform corresponding to the position of the positioning plate is provided on the side wall of the punch base body.

[0009] An exhaust hole is provided on the concave platform, and a pressure relief channel communicated with the discharge hole is provided below the exhaust hole.

[0010] The punch core includes a lining plate located in the cavity. One end of the lining plate is provided with a positioning sleeve coaxially distributed with the unloading hole, and the other end is provided with an annular extension plate connected to the punch base.

[0011] The end of the unloading hole is provided with a clamping boss for cooperating with the positioning sleeve, and the diameter of the clamping boss is larger than that of the positioning sleeve.

[0012] The annular extension plate is detachably connected to the punch base, and the end of the punch base is provided with an annular groove corresponding to the position of the annular extension plate.

[0013] A counterpoint groove is provided at the connection between the annular groove and the cavity, and a counterpoint rib corresponding to the position of the counterpoint groove is provided on the side wall of the annular extension plate.

[0014] The beneficial effects of the embodiment of the present invention are as follows: 1. The combined punch for roller forming includes a punch base and a punch core. A cavity for installing the punch core is provided on one side wall of the punch base. A discharge hole is provided in the punch base. One end of the discharge hole communicates with the cavity, and the other end is provided with a discharge air nozzle. After the end of the roller is stamped, high-pressure gas is filled into the discharge hole through the discharge air nozzle to apply pressure to the roller to complete the separation from the punch base. Compared with the traditional method of using a caliper to pick up the material, it can avoid contacting the side wall of the roller and prevent scratching, thus improving the product quality.

[0015] 2. The punch core includes a lining plate located in the cavity. The lining plate fits against the inner side wall of the cavity and has an arc-shaped concave in the middle. One end of the lining plate is provided with a positioning sleeve coaxially distributed with the unloading hole, and the other end is provided with an annular extension plate detachably connected to the punch base by bolts. The structure is simple and convenient for replacing the lining plate. The lining plate can form a buffer between the material and the side wall of the cavity, avoiding damage to the side wall of the cavity during stamping. Description of the Drawings

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0017] Figure 2 It is a cross-sectional view of the present invention;

[0018] Figure 3 It is a schematic diagram of the structure of the lining plate in the present invention;

[0019] Figure 4 It is a schematic diagram of the structure of the annular groove in the present invention.

[0020] In the figure: 1. Punch base; 2. Punch core; 3. Cavity; 4. Unloading hole; 5. Unloading air nozzle; 6. Positioning plate; 7. Concave platform; 8. Exhaust hole; 9. Pressure relief channel; 10. Liner plate; 11. Positioning sleeve; 12. Annular extension plate; 13. Clamping boss; 14. Annular groove; 15. Alignment groove; 16. Alignment rib. Specific embodiments

[0021] The following describes the preferred embodiments of the present invention with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principle of the present invention and are not intended to limit the protection scope of the present invention.

[0022] As Figures 1-4 shown, the combined punch for roller forming in this embodiment includes a punch base 1 and a punch core 2. A cavity 3 for installing the punch core 2 is provided on one side wall of the punch base 1. An unloading hole 4 is provided in the punch base 1. One end of the unloading hole 4 is communicated with the cavity 3, and the other end is provided with an unloading air nozzle 5. After the end of the roller is stamped, the unloading air nozzle 5 is used to fill high-pressure gas into the unloading hole 4 to apply pressure to the roller to complete the separation from the punch base 1. Compared with the traditional method of using a caliper to pick up the material, it can avoid contacting the side wall of the roller and avoid scratching, improving the quality of the product.

[0023] A positioning plate 6 is provided in the middle of the unloading air nozzle 5. A concave platform 7 corresponding to the position of the positioning plate 6 is provided on the side wall of the punch base 1. The positioning plate 6 is placed in the concave platform 7, and the positioning plate 6 is detachably connected to the punch base 1 by bolts to prevent the unloading air nozzle 5 from falling off.

[0024] An exhaust hole 8 is provided on the concave platform 7. A pressure relief channel 9 communicated with the unloading hole 4 is provided below the exhaust hole 8. The design of the pressure relief channel can discharge the gas in the unloading hole 4 to the outside during the stamping operation to prevent the unloading hole 4 from being damaged due to excessive pressure after the air in the unloading hole 4 is compressed. The diameter of the pressure relief channel 9 is smaller than the diameter of the unloading hole 4. The lower end of the pressure relief channel 9 is located in the middle of the blanking hole 4. An avoidance hole corresponding to the position of the exhaust hole 8 is provided on the positioning plate 4, and a one-way valve is installed at the avoidance hole to prevent impurities from falling into the pressure relief channel 9.

[0025] The punch core 2 includes a liner plate 10 located in the cavity 3. The liner plate 10 is attached to the inner side wall of the cavity 3 and has an arc-shaped concave in the middle. One end of the liner plate 10 is provided with a positioning sleeve 11 coaxially distributed with the unloading hole 4, and the other end is provided with an annular extension plate 12 detachably connected to the punch base 1 by bolts.

[0026] The end of the discharge hole 4 is provided with a clamping boss 13 that is used in cooperation with the positioning sleeve 11. The diameter of the clamping boss 13 is larger than that of the positioning sleeve 11. When discharging and blowing, it is avoided that the high-pressure air flow exerts a force on the positioning sleeve 11, which may cause the lining plate 10 to become loose.

[0027] The annular extension plate 12 is detachably connected to the punch base 1. The end of the punch base 1 is provided with an annular groove 14 corresponding to the position of the annular extension plate 12. A positioning groove 15 is provided at the connection between the annular groove 14 and the cavity 3. A positioning convex rib 16 corresponding to the position of the positioning groove 15 is provided on the side wall of the annular extension plate 12. The number of the positioning convex ribs 16 and the positioning grooves 15 is multiple, and they are evenly distributed along the circumferential direction of the annular extension plate 12.

[0028] It should be noted that in the description of the present invention, the terms indicating directions or positional relationships such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings. This is only for the convenience of description, rather than indicating or implying that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0029] In addition, it should also be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installation", "connection", "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0030] The term "including" or any other similar term is intended to cover non-exclusive inclusion, so that a process, article, or device / equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or also includes the elements inherent in these processes, articles, or devices / equipment.

[0031] So far, the technical solution of the present invention has been described in combination with the preferred embodiments shown in the drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the protection scope of the present invention.

Claims

1. A combined punch for roller forming, comprising a punch base (1) and a punch core (2), characterized in that: A cavity (3) for mounting a punch core (2) is provided on one side wall of the punch base (1), a discharge hole (4) is provided in the punch base (1), one end of the discharge hole (4) is connected to the cavity (3), and the other end is provided with a discharge air nozzle (5).

2. The roller forming combined punch according to claim 1, characterized in that: A positioning plate (6) is arranged in the middle of the discharge air nozzle (5), and a concave platform (7) corresponding to the position of the positioning plate (6) is arranged on the side wall of the punch base (1).

3. The combined punch for roller forming according to claim 2, characterized in that: The concave platform (7) is provided with an exhaust hole (8), and a pressure relief channel (9) communicating with the discharge hole (4) is provided at the lower part of the exhaust hole (8).

4. The roller forming combined punch according to claim 1, characterized in that: The punch core (2) comprises a lining plate (10) located in the mold cavity (3), one end of the lining plate (10) is provided with a positioning sleeve (11) coaxially distributed with the discharge hole (4), and the other end is provided with an annular extension plate (12) connected to the punch base (1).

5. The combined punch for roller forming according to claim 4, characterized in that: The end of the discharge hole (4) is provided with a clamping boss (13) used in conjunction with the positioning sleeve (11), and the diameter of the clamping boss (13) is larger than the diameter of the positioning sleeve (11).

6. The combined punch for roller forming according to claim 4, characterized in that: The annular extension plate (12) is detachably connected to the punch base (1), and an annular groove (14) corresponding to the position of the annular extension plate (12) is provided at the end of the punch base (1).

7. The combined punch for roller forming according to claim 6, characterized in that: An alignment groove (15) is provided at the connection between the annular groove (14) and the mold cavity (3), and an alignment convex ridge (16) corresponding to the position of the alignment groove (15) is provided on the side wall of the annular extension plate (12).

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