A hexagonal head forming device for a hexagonal flange bolt

Abstract

This utility model discloses a forming device for hexagonal heads of hexagonal flange bolts, including a punch and a main die; one end of the punch has a punch core; one end of the main die has a support tube corresponding to the punch core; the punch core has a forming cavity penetrating through the punch core; a punch ejection mechanism extending into the forming cavity is repositionably provided inside the punch; the main die has an ejection hole coaxially arranged with the support tube; and an ejector rod is movably connected to the ejection hole. This utility model replaces the traditional production method of trimming and removing material by directly completing the integral precision forming of the hexagonal head and flange in the forming cavity through the coaxial positioning of the punch core forming cavity and the support tube. The process eliminates the need for trimming, improving material utilization, saving materials, simplifying production processes, and increasing production efficiency.

Description

Technical Field

[0001] This utility model relates to the field of mold technology, and in particular to a forming device for a hexagonal head of a hexagonal flange bolt. Background Technology

[0002] Hexagonal flange bolts are fasteners consisting of a hexagonal head, an integrated flange, and a threaded rod. They are used in conjunction with nuts to connect two parts with through holes. Their core feature is the integrated design of the flange and hexagonal head, providing both fastening and anti-loosening properties. Currently, the production process of hexagonal flange bolts uses a trimming and material removal process, which involves numerous steps, requires the removal of a significant amount of material, resulting in low material utilization. Furthermore, this trimming and material removal process leads to a high scrap rate, thus increasing production costs.

[0003] Therefore, it is necessary to design a hexagonal head forming device for hexagonal flange bolts to solve the above problems. Utility Model Content

[0004] The purpose of this utility model is to address the shortcomings of the existing technology by proposing a hexagonal head forming device for hexagonal flange bolts.

[0005] The technical solution of this utility model is: a forming device for a hexagonal head of a hexagonal flange bolt, comprising a punch and a main die; one end of the punch is provided with a punch core; one end of the main die is provided with a support tube corresponding to the punch core; a forming cavity penetrating the punch core is provided in the middle of the punch core; a punch ejection mechanism extending into the forming cavity is repositionably provided inside the punch; an ejection hole coaxially arranged with the support tube is provided inside the main die; an ejector rod is movably connected inside the ejection hole.

[0006] The die includes a die shell; the die shell has a stepped hole; the die core is located in the small end of the stepped hole; a first inner pad, a first middle pad, and a first outer pad are sequentially arranged in the large end of the stepped hole; the end of the die shell has a first end pad that presses the first inner pad, the first middle pad, and the first outer pad against the large end of the stepped hole.

[0007] The die ejection mechanism includes a die ejector rod, a fixed sleeve, a fixed block, and an ejector bar; the die ejector rod passes through the fixed sleeve and is limited by a step; the fixed block presses against the fixed sleeve, fixing the die ejector rod in the fixed sleeve, and the fixed sleeve and the fixed block are slidably connected in the first middle pad; the ejector bar passes through the first end pad and the first outer pad in sequence and abuts against the fixed block.

[0008] A return spring is fitted on the die ejector rod between the first inner pad block and the fixed sleeve.

[0009] The main mold includes a main mold shell and a second inner pad, a second middle pad, a second outer pad, and a second end pad arranged sequentially inside the main mold shell; the support tube passes through the second inner pad and is limited by a step to the second inner pad; the second middle pad is provided with a limiting ring inside the second inner pad to fix the support tube in the second inner pad.

[0010] A sealing ring is provided between the outer wall of the support tube and the inner wall of the second inner pad.

[0011] The main mold shell is provided with a guide ring at one end corresponding to the punch die for guiding the end of the punch die; the guide ring and the main mold shell are limited by a step and pressed into the punch die shell by a second inner pad block.

[0012] By adopting the above technical solution, this utility model has the following beneficial effects: This utility model replaces the traditional production method of cutting edges to remove material by directly completing the integral precision forming of the hexagonal head and flange in the forming cavity through the coaxial positioning of the die core forming cavity and the support tube. The process does not require edge cutting, which not only improves the material utilization rate and saves materials, but also simplifies the production process and improves production efficiency. Attached Figure Description

[0013] To make the contents of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings.

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

[0015] Figure 2 This is a cross-sectional view of the present invention.

[0016] The labels in the attached diagram are:

[0017] Die 1, Die Core 1-1, First Inner Pad 1-2, First Middle Pad 1-3, First Outer Pad 1-4, First End Pad 1-5, Die Shell 1-6, Main Die 2, Support Tube 2-1, Ejector Rod 2-2, Main Die Shell 2-3, Second Inner Pad 2-4, Second Middle Pad 2-5, Second Outer Pad 2-6, Second End Pad 2-7, Limiting Ring 2-8, Sealing Ring 2-9, Guide Ring 2-10, Die Ejection Mechanism 3, Die Ejector Rod 3-1, Fixing Sleeve 3-2, Fixing Block 3-3, Ejector Rod 3-4, Return Spring 3-5. Detailed Implementation

[0018] Example

[0019] See Figure 1 and Figure 2This embodiment of a forming device for a hexagonal head of a hexagonal flange bolt includes a punch 1 and a main die 2; one end of the punch 1 is provided with a punch core 1-1; one end of the main die 2 is provided with a support tube 2-1 corresponding to the punch core 1-1; a forming cavity penetrating the punch core 1-1 is provided in the middle of the punch core 1-1; a punch ejection mechanism 3 extending into the forming cavity is repositionably provided in the punch 1; an ejection hole coaxially provided with the support tube 2-1 is provided in the main die 2; an ejector rod 2-2 is movably connected in the ejection hole.

[0020] Further, the die 1 includes a die shell 1-6; the die shell 1-6 has a stepped hole; the die core 1-1 is located in the small end of the stepped hole; the large end of the stepped hole is provided with a first inner pad 1-2, a first middle pad 1-3, and a first outer pad 1-4 in sequence; the end of the die shell 1-6 is provided with a first end pad 1-5 that abuts the first inner pad 1-2, the first middle pad 1-3, and the first outer pad 1-4 against the large end of the stepped hole. In this embodiment, the die core 1-1 is fixed by the stepped hole, and the support tube 2-1 adopts a double positioning of the limiting ring and the step, which, together with the axial clamping force of each pad, greatly reduces the risk of component displacement under high-frequency stamping, ensures the dimensional stability of the forming cavity during long-term operation, and is suitable for high-intensity continuous production.

[0021] Further, the die ejection mechanism 3 includes a die ejector rod 3-1, a fixed sleeve 3-2, a fixed block 3-3, and an ejector bar 3-4; the die ejector rod 3-1 passes through the fixed sleeve 3-2 and is limited by a step; the fixed block 3-3 presses against the fixed sleeve 3-2, fixing the die ejector rod 3-1 in the fixed sleeve 3-2, and the fixed sleeve 3-2 and the fixed block 3-3 are slidably connected in the first middle pad 1-3; the ejector bar 3-4 passes through the first end pad 1-5 and the first outer pad 1-4 in sequence and abuts against the fixed block 3-3. A return spring 3-5 is sleeved on the die ejector rod 3-1 between the first inner pad 1-2 and the fixed sleeve 3-2. In this embodiment, the ejector mechanism 3 automatically returns to its original position via the return spring 3-5. Combined with the linkage design of the external power source of the ejector rod 3-4, it ensures that the ejector rod 2-2 is accurately reset after forming, avoiding jamming. The sliding connection between the fixed sleeve 3-2 and the fixed block 3-3 further optimizes the linear accuracy of the ejection action, significantly reducing the failure rate and extending the service life.

[0022] Furthermore, the main mold 2 includes a main mold shell 2-3 and a second inner pad 2-4, a second middle pad 2-5, a second outer pad 2-6, and a second end pad 2-7 sequentially disposed within the main mold shell 2-3; the support tube 2-1 passes through the second inner pad 2-4 and is limited by a step to the second inner pad 2-4; the second middle pad 2-5 has a limiting ring 2-8 inside to fix the support tube 2-1 to the second inner pad 2-4. In this embodiment, the punch die 1 and the main mold 2 adopt a split pad design, which is fixed by pressing the end pads together. This not only enhances the structural rigidity but also facilitates the quick replacement of worn parts, reduces maintenance costs, and allows for flexible adjustment of the pad combination according to different product specifications, improving equipment adaptability.

[0023] Furthermore, a sealing ring 2-9 is provided between the outer wall of the support tube 2-1 and the inner wall of the second inner pad 2-4, which can ensure the stability of the connection between the support tube 2-1 and the second inner pad 2-4, so as to ensure production quality.

[0024] Furthermore, the main mold shell 2-3 is provided with a guide ring 2-10 at one end corresponding to the punch 1 for guiding the end of the punch 1; the guide ring 2-10 and the main mold shell 2-3 are limited by a step, and are pressed into the punch shell 1-6 by the second inner pad block 2-4. The guide ring 2-10 and the step limiting design realize the precise alignment of the punch 1 and the main mold 2, ensuring uniform force during hexagonal head forming, improving the consistency of flange surface dimensions, and improving production quality.

[0025] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above descriptions are merely specific embodiments of this utility model and are not intended to limit this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A forming device for the hexagonal head of a hexagonal flange bolt, characterized in that: It includes a punch (1) and a main mold (2); one end of the punch (1) is provided with a punch core (1-1); one end of the main mold (2) is provided with a support tube (2-1) corresponding to the punch core (1-1); the middle of the punch core (1-1) is provided with a forming cavity that passes through the punch core (1-1); the punch (1) is provided with a punch ejection mechanism (3) that extends into the forming cavity and can be reset in place; the main mold (2) is provided with an ejection hole that is coaxially arranged with the support tube (2-1); an ejector rod (2-2) is movably connected in the ejection hole.

2. The hexagonal head forming device for a hexagonal flange bolt according to claim 1, characterized in that: The die (1) includes a die shell (1-6); the die shell (1-6) has a stepped hole; the die core (1-1) is located in the small end of the stepped hole; the large end of the stepped hole is provided with a first inner pad (1-2), a first middle pad (1-3) and a first outer pad (1-4) in sequence; the end of the die shell (1-6) is provided with a first end pad (1-5) that abuts the first inner pad (1-2), the first middle pad (1-3) and the first outer pad (1-4) against the large end of the stepped hole.

3. The hexagonal head forming device for a hexagonal flange bolt according to claim 2, characterized in that: The die ejection mechanism (3) includes a die ejector rod (3-1), a fixed sleeve (3-2), a fixed block (3-3), and an ejector bar (3-4); the die ejector rod (3-1) passes through the fixed sleeve (3-2) and is limited by a step; the fixed block (3-3) presses against the fixed sleeve (3-2) to fix the die ejector rod (3-1) in the fixed sleeve (3-2), and the fixed sleeve (3-2) and the fixed block (3-3) are slidably connected in the first middle pad (1-3); the ejector bar (3-4) passes through the first end pad (1-5) and the first outer pad (1-4) in sequence and abuts against the fixed block (3-3).

4. The hexagonal head forming device for a hexagonal flange bolt according to claim 3, characterized in that: A return spring (3-5) is fitted on the die ejector rod (3-1) between the first inner pad block (1-2) and the fixed sleeve (3-2).

5. The hexagonal head forming device for a hexagonal flange bolt according to claim 1, characterized in that: The main mold (2) includes a main mold shell (2-3) and a second inner pad (2-4), a second middle pad (2-5), a second outer pad (2-6), and a second end pad (2-7) arranged sequentially in the main mold shell (2-3); the support tube (2-1) passes through the second inner pad (2-4) and is limited to the second inner pad (2-4) by a step; the second middle pad (2-5) is provided with a limiting ring (2-8) inside to fix the support tube (2-1) in the second inner pad (2-4).

6. The hexagonal head forming device for a hexagonal flange bolt according to claim 5, characterized in that: A sealing ring (2-9) is provided between the outer wall of the support tube (2-1) and the inner wall of the second inner pad (2-4).

7. The forming device for the hexagonal head of a hexagonal flange bolt according to claim 5, characterized in that: The main mold shell (2-3) is provided with a guide ring (2-10) at one end corresponding to the punch (1) for guiding the end of the punch (1); the guide ring (2-10) and the main mold shell (2-3) are limited by a step, and are pressed into the punch shell (1-6) by the second inner pad block (2-4).

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