Tool for punching hexagon on cylindrical head bolt

Abstract

The hexagon punching tool for the cylindrical head bolt comprises a lower die and an upper die, a first round hole is formed in the lower die, a second round hole is formed in the bottom wall of the first round hole, a round plate is arranged at the top end of the lower die, linear faces are milled on the left side and the right side of the round plate, a cylindrical boss is arranged on the lower die and located below the round plate, and a bolt gland is located at the upper end of the lower die. The bolt gland is in a round sheet shape, a cylindrical cavity is formed in the bolt gland, a linear groove is milled in the bottom end of the cylindrical cavity, the cylindrical cavity is communicated with the linear groove, the linear face of the round plate is matched with the linear groove, an upper die is arranged above the bolt gland, an installation hole is formed in the lower end of the upper die, and the punch is installed in the installation hole. The punch penetrates through the through hole to conduct inner hexagon punching on the cylindrical head bolt, then the punch is lifted upwards, the bolt gland is rotated by about 90 degrees, the bolt gland is taken down, then the machined cylindrical head bolt is taken out, the next cylindrical head bolt is machined, the whole tool is convenient to mount and dismount, and the machining efficiency is improved.

Description

Technical Field

[0001] This utility model belongs to the field of bolt processing technology, specifically relating to a tooling for punching a hexagonal cylindrical head bolt. Background Technology

[0002] Bolt and screw head types generally include external hexagon, internal hexagon, Phillips head, and slotted head, among which internal hexagon head bolts are characterized by high tightening torque, small installation space, and high reliability, making them widely used in various connection applications. Internal hexagon head bolts are machined using methods such as EDM, punching, cold extrusion, and hot extrusion. Existing stamping fixtures for cylindrical head bolts are inconvenient to install and disassemble, affecting processing efficiency. Utility Model Content

[0003] Therefore, this utility model aims to solve the problem that the installation and disassembly of the cylindrical head bolt stamping fixture in the prior art is inconvenient and affects processing efficiency.

[0004] Therefore, the technical solution adopted is a hexagonal tooling for punching cylindrical head bolts according to this utility model, including: a lower die and an upper die. The lower die has a first circular hole, and a second circular hole is provided on the bottom wall of the first circular hole. The diameter of the first circular hole is larger than the diameter of the second circular hole. A circular plate is provided at the top of the lower die. Straight surfaces are milled on the left and right sides of the circular plate. A cylindrical boss is provided on the lower die below the circular plate. A bolt cover is located at the upper end of the lower die. The bolt cover is circular in shape and has a cylindrical cavity inside. A straight groove is milled at the bottom end of the cylindrical cavity. The cylindrical cavity is connected to the straight groove. The straight surface of the circular plate mates with the straight groove. An upper die is provided above the bolt cover. An installation hole is provided at the lower end of the upper die, and the punch is installed in the installation hole.

[0005] Preferably, the punch cap is threaded to the lower outer wall of the upper die.

[0006] Preferably, the top of the bolt cap is provided with a through hole, which communicates with the cylindrical cavity.

[0007] Preferably, the diameter of the through hole is smaller than the diameter of the first circular hole.

[0008] Preferably, the outer wall of the upper mold is provided with protruding pillars.

[0009] Preferably, the outer wall of the protruding column is provided with anti-slip texture.

[0010] The present invention has the following advantages: The present invention provides a hexagonal punching tool for cylindrical head bolts. The punch passes through the through hole to perform internal hexagonal punching on the cylindrical head bolt. After that, the punch is lifted upward, the bolt cover is rotated about 90°, the bolt cover is removed, and then the processed cylindrical head bolt is taken out to process the next cylindrical head bolt. The entire tooling is easy to install and disassemble, which improves the processing efficiency.

[0011] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of this invention can be realized and obtained by means of the structures particularly pointed out in the written description and the accompanying drawings.

[0012] The technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0013] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the lower mold structure in this utility model;

[0016] Figure 3 This is a top view of the lower mold in this utility model;

[0017] Figure 4 This is a schematic diagram of the bolt gland structure in this utility model;

[0018] Figure 5 This is a bottom view of the bolt cover in this utility model;

[0019] Among them, 1. lower die; 2. first round hole; 3. second round hole; 4. round plate; 5. straight surface; 6. cylindrical boss; 7. bolt cover; 8. cylindrical cavity; 9. straight groove; 10. upper die; 11. mounting hole; 12. punch; 13. punch cover; 14. through hole; 15. protruding post. Detailed Implementation

[0020] To make the technical problem to be solved, the technical solution, and the beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0021] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly or indirectly attached to that other component. When a component is referred to as being "connected to" another component, it can be directly or indirectly connected to that other component.

[0022] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0023] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0024] This utility model provides a hexagonal tooling for punching cylindrical head bolts, such as... Figure 1-5 As shown, the assembly includes a lower die 1 and an upper die 10. The lower die 1 has a first circular hole 2, and a second circular hole 3 is formed on the bottom wall of the first circular hole 2. The diameter of the first circular hole 2 is larger than the diameter of the second circular hole 3. A circular plate 4 is positioned at the top of the lower die 1, with straight surfaces 5 milled on both sides of the circular plate 4. A cylindrical boss 6 is positioned on the lower die 1 below the circular plate 4. A bolt cover 7 is located at the upper end of the lower die 1 and is circular in shape. A cylindrical cavity 8 is formed inside the bolt cover 7, with a straight groove 9 milled at the bottom of the cylindrical cavity 8, connecting the cylindrical cavity 8 to the straight groove 9. The straight surfaces 5 of the circular plate 4 mate with the straight groove 9. The upper die 10 is positioned above the bolt cover 7, with a mounting hole 11 at its lower end. A punch 12 is installed in the mounting hole 11. A punch cover 13 is threaded to the lower outer wall of the upper die 10, facilitating the installation and removal of the punch cover 13. The top of the bolt cap 7 is provided with a through hole 14, which communicates with the cylindrical cavity 8, allowing the punch 12 to pass through the through hole 14. The diameter of the through hole 14 is smaller than the diameter of the first circular hole 2. The outer wall of the upper mold 10 is provided with a protruding post 15, and the outer wall of the protruding post 15 is provided with anti-slip texture, making it easy to grip and install the upper mold 10.

[0025] The beneficial technical effects of the above technical solution are as follows: The required punch 12 is placed in the mounting hole 11 and fixed to the lower end of the upper die 10 by the punch cover 13. The upper die 10 is installed on the stamping machine, and the lower die 1 is installed on the worktable of the stamping machine. The cylindrical head bolt is placed in the cavity formed by the first circular hole 2 and the second circular hole 3. The bolt cover 7 is installed on the top of the lower die 1. The straight surface 5 of the circular plate 4 is parallel to the straight groove 9 of the bolt cover 7. The bolt cover 7 is rotated about 90°, and the long end of the circular plate 4 is inserted into the cylindrical cavity 8 of the bolt cover 7, thereby fixing the cylindrical head bolt in the lower die 1. Then, the pedal of the stamping machine is stepped on, and the punch 12 passes through the through hole 14 to perform internal hexagonal punching on the cylindrical head bolt. After that, the punch 12 is lifted upward, and the bolt cover 7 is rotated about 90° again to remove the bolt cover 7. Then, the processed cylindrical head bolt is taken out and the next cylindrical head bolt is processed. The entire tooling is easy to install and disassemble, which improves the processing efficiency.

[0026] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A tooling for punching a hexagonal cylindrical head bolt, characterized in that, include: The lower mold (1) and the upper mold (10) are provided. The lower mold (1) has a first circular hole (2) inside. The bottom wall of the first circular hole (2) has a second circular hole (3). The diameter of the first circular hole (2) is larger than the diameter of the second circular hole (3). The top of the lower mold (1) is provided with a circular plate (4). The left and right sides of the circular plate (4) are milled with straight surfaces (5). A cylindrical boss (6) is provided on the lower mold (1) below the circular plate (4). The bolt cap (7) is located on the lower mold (1). At the end, the bolt cap (7) is in the shape of a circular plate, and a cylindrical cavity (8) is provided inside the bolt cap (7). A straight groove (9) is milled at the bottom of the cylindrical cavity (8). The cylindrical cavity (8) is connected to the straight groove (9). The straight surface (5) of the circular plate (4) is matched with the straight groove (9). An upper mold (10) is provided above the bolt cap (7). An installation hole (11) is provided at the lower end of the upper mold (10). The punch (12) is installed in the installation hole (11).

2. The hexagonal punching fixture for cylindrical head bolts according to claim 1, characterized in that, The punch cap (13) is threaded to the lower outer wall of the upper die (10).

3. The hexagonal punching fixture for cylindrical head bolts according to claim 1, characterized in that, The top of the bolt cap (7) is provided with a through hole (14), which is connected to the cylindrical cavity (8).

4. The hexagonal punching fixture for cylindrical head bolts according to claim 3, characterized in that, The diameter of the through hole (14) is smaller than the diameter of the first circular hole (2).

5. A hexagonal punching tool for cylindrical head bolts according to claim 1, characterized in that, The outer wall of the upper mold (10) is provided with protrusions (15).

6. A hexagonal punching fixture for cylindrical head bolts according to claim 1, characterized in that, The outer wall of the protruding column (15) is provided with anti-slip texture.

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