High-precision hexagonal washer bolt forming die

Abstract

The utility model relates to the field of dies, and discloses a high-precision hexagonal washer bolt forming die which comprises a lower die, a placing hole is formed in the top face of the lower die, an upper die is arranged above the lower die, a mounting cavity is formed in the top face of the upper die, a hexagonal cutter is detachably arranged in the mounting cavity, and a hexagonal nut is arranged in the hexagonal cutter. Mounting plates are fixed to the left side and the right side of the outer wall of the lower mold and the left side and the right side of the outer wall of the upper mold correspondingly, and first threaded holes are formed in the top faces of the two mounting plates correspondingly. According to the utility model, the hexagonal cutter is used for changing the original method of binding a hexagon and pressing a washer, and a method of cutting a hexagon and cutting a washer circle is used for production, so that the impact force between a punching die and a beating die is reduced, the service lives of the lower die and the upper die are prolonged, the connection strength between the head part and the rod part of a product is improved, and the appearance is more attractive.

Description

Technical Field

[0001] The utility model relates to the technical field of molds, in particular to a high-precision hexagonal washer bolt forming mold. Background Art

[0002] With the rapid development of industrial technology, high-precision bolts are increasingly used in a variety of fields, including machinery manufacturing, aerospace, and the automotive industry. Hexagonal washer bolts, as a special type of high-precision bolt, are widely used in applications requiring extremely high connection strength and stability due to their unique head design and excellent connection performance.

[0003] At present, when processing hexagonal washer bolts with thin head washers, the method of bundled hexagonal pressed washers is usually adopted. However, there are the following disadvantages: due to the complex head structure and thin wall thickness, the traditional production process is prone to mold breakage during the mold stamping process, resulting in a reduced mold service life. Utility Model Content

[0004] The purpose of the utility model is to provide a high-precision hexagonal washer bolt forming die to solve the problem that due to the complex head structure and thin wall thickness, the traditional production process easily causes the die to break during the die stamping process, resulting in a reduction in the service life of the die.

[0005] In order to achieve the above-mentioned purpose of the utility model, the utility model adopts the following technical solutions: a high-precision hexagonal washer bolt forming mold, comprising a lower mold, the top surface of which is provided with a placement hole, an upper mold is provided above the lower mold, the top surface of the upper mold is provided with an installation cavity, and a hexagonal tool is detachably provided inside the installation cavity, and mounting plates are fixed on the left and right sides of the outer walls of the lower mold and the upper mold, respectively, and the top surfaces of the two mounting plates are respectively provided with first threaded holes.

[0006] Preferably, two limiting holes are provided on the top surface of the lower mold, and two limiting posts are fixed on the bottom surface of the upper mold, and the two limiting posts are slidably inserted into the two limiting holes respectively.

[0007] Preferably, a top rod is slidably inserted into the placement hole, and a bottom plate is fixed to the bottom end of the top rod.

[0008] Preferably, a return spring is fixed to the bottom surface of the lower mold, the return spring is wrapped around the top rod, and the bottom end of the return spring is fixedly connected to the top surface of the bottom plate.

[0009] Preferably, thread grooves are respectively opened on the left and right sides of the outer wall of the hexagonal tool, and second threaded holes are respectively opened on the left and right sides of the outer wall of the upper mold, and bolt bodies are respectively threadedly connected in the two second threaded holes, and the threaded ends of the two bolt bodies are respectively connected to the internal threads of the two thread grooves.

[0010] Preferably, washers are respectively provided between the two bolt bodies and the upper mold.

[0011] Compared with the existing technology, a high-precision hexagonal washer bolt forming die using the above technical solution has the following beneficial effects:

[0012] 1. During use, the original method of pressing the washer with a hexagonal cutter is changed to cutting the washer into a circle by cutting the hexagonal washer. This reduces the impact force between the punching die and the die, increases the service life of the lower and upper dies, and improves the connection strength between the head and the stem of the product, making the appearance more beautiful.

[0013] Second, during use, as the upper mold slowly descends under the action of the hydraulic push rod, the two limit posts fixed on its bottom surface will accurately insert into the limit holes on the top surface of the lower mold. During this process, the limit posts slide smoothly in the limit holes, effectively limiting the lateral movement of the upper mold and maintaining its stability even under high-intensity processing pressure. The ejector rod and bottom plate facilitate the ejection of the hexagonal washer bolts inside the placement hole, making it easy to remove the hexagonal washer bolts;

[0014] During use, a return spring automatically resets the ejector pin, ejecting the hexagonal washer bolt from its placement hole without manual intervention, making it both quick and efficient. This reduces hexagonal tool replacement time and improves equipment utilization. The washers effectively disperse the pressure generated during bolt tightening, preventing damage to the upper mold or the threaded portion of the bolt body due to localized excessive pressure. This not only improves the overall stability of the mold system but also extends the service life of the upper mold. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional schematic diagram of an embodiment.

[0016] Figure 2 Schematic diagram of the explosion of the embodiment.

[0017] Figure 3 Schematic cross-sectional view of the upper mold and hexagonal tool in the embodiment.

[0018] Figure 4 For example Figure 2 Enlarged schematic diagram of point A in the middle.

[0019] In the figure: 1. Lower mold; 2. Placement hole; 3. Upper mold; 4. Mounting cavity; 5. Hexagonal cutter; 6. Mounting plate; 7. First threaded hole; 8. Limiting hole; 9. Limiting column; 10. Push rod; 11. Bottom plate; 12. Return spring; 13. Threaded groove; 14. Second threaded hole; 15. Bolt body; 16. Washer. DETAILED DESCRIPTION

[0020] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0021] like Figure 1-Figure 4 As shown, a high-precision hexagonal washer bolt forming mold includes a lower mold 1, a placement hole 2 is provided on the top surface of the lower mold 1, an upper mold 3 is provided above the lower mold 1, a mounting cavity 4 is provided on the top surface of the upper mold 3, and a hexagonal tool 5 is detachably provided inside the mounting cavity 4. Mounting plates 6 are fixed on the left and right sides of the outer walls of the lower mold 1 and the upper mold 3, and first threaded holes 7 are provided on the top surfaces of the two mounting plates 6.

[0022] During use, the staff first installs the upper mold 3 on the hydraulic push rod through the mounting plate 6 and the first threaded hole 7, and installs the lower mold 1 on the workbench. Then, the headed hexagonal washer bolt is placed inside the placement hole 2, so that the rod of the hexagonal washer bolt is inserted into the placement hole 2. Then, the upper mold 3 is pressed down, so that the hexagonal tool 5 cuts the hexagon and washer circle on the head of the hexagonal washer bolt.

[0023] By using the hexagonal tool 5 to change the original method of bundling hexagonal washers, the method of cutting hexagonal washers into circles is used to reduce the impact force between the punching die and the die, thereby increasing the service life of the lower die 1 and the upper die 3, and improving the connection strength between the product head and the stem, making the appearance more beautiful.

[0024] like Figure 1-Figure 4 As shown, two limiting holes 8 are provided on the top surface of the lower mold 1 , and two limiting posts 9 are fixed on the bottom surface of the upper mold 3 . The two limiting posts 9 are slidably inserted into the two limiting holes 8 .

[0025] During use, as the upper mold 3 slowly descends under the action of the hydraulic push rod, the two limit columns 9 fixed on its upper bottom surface will be accurately inserted into the limit holes 8 on the top surface of the lower mold 1. During this process, the limit columns 9 slide smoothly in the limit holes 8, effectively limiting the lateral movement of the upper mold 3 and maintaining its stability even under high-intensity processing pressure.

[0026] like Figure 1 、 Figure 2 and Figure 4As shown, a push rod 10 is slidably inserted into the placement hole 2, and a bottom plate 11 is fixed to the bottom end of the push rod 10. A return spring 12 is fixed to the bottom surface of the lower mold 1. The return spring 12 surrounds the push rod 10, and the bottom end of the return spring 12 is fixedly connected to the top surface of the bottom plate 11.

[0027] During use, the push rod 10 and the bottom plate 11 facilitate the ejection of the hexagonal washer bolt from the placement hole 2, making it easier to remove the hexagonal washer bolt. When the push rod 10 is squeezed by the hexagonal washer bolt, it moves downward, and the return spring 12 is in a stretched state. When the hexagonal washer bolt is processed and the pressure is removed, the return spring 12 automatically resets the push rod 10, ejecting the hexagonal washer bolt from the placement hole 2 without manual intervention, which is both quick and efficient.

[0028] like Figure 1-Figure 3 As shown, thread grooves 13 are respectively opened on the left and right sides of the outer wall of the hexagonal tool 5, and second threaded holes 14 are respectively opened on the left and right sides of the outer wall of the upper mold 3. Bolt bodies 15 are respectively threadedly connected in the two second threaded holes 14, and the threaded ends of the two bolt bodies 15 are respectively connected to the internal threads of the two thread grooves 13, and washers 16 are respectively provided between the two bolt bodies 15 and the upper mold 3.

[0029] During use, when the hexagonal tool 5 needs to be replaced or maintained, the operator simply loosens the bolt body 15 to easily remove the hexagonal tool 5 from the mounting cavity 4. Similarly, when installing a new hexagonal tool 5, the operator simply aligns the thread groove 13 of the hexagonal tool 5 with the second threaded hole 14 and tightens the bolt body 15. This shortens the time it takes to replace the hexagonal tool 5 and improves equipment utilization. The washer 16 effectively disperses the pressure generated when tightening the bolt, preventing damage to the upper mold 3 or the threaded portion of the bolt body 15 due to excessive local pressure. This not only improves the overall stability of the mold system but also extends the service life of the upper mold 3.

[0030] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A high-precision hexagonal washer bolt forming die, comprising a lower die (1), characterized in that: The top surface of the lower mold (1) is provided with a placement hole (2), an upper mold (3) is provided above the lower mold (1), a mounting cavity (4) is provided on the top surface of the upper mold (3), a hexagonal tool (5) is detachably provided inside the mounting cavity (4), mounting plates (6) are fixed on the left and right sides of the outer walls of the lower mold (1) and the upper mold (3), and the top surfaces of the two mounting plates (6) are respectively provided with first threaded holes (7).

2. The high-precision hexagonal washer bolt forming die according to claim 1, characterized in that: Two limiting holes (8) are provided on the top surface of the lower mold (1), and two limiting columns (9) are fixed on the bottom surface of the upper mold (3). The two limiting columns (9) are slidably inserted into the two limiting holes (8) respectively.

3. The high-precision hexagonal washer bolt forming die according to claim 2, characterized in that: A top rod (10) is slidably inserted into the interior of the placement hole (2), and a bottom plate (11) is fixed to the bottom end of the top rod (10).

4. The high-precision hexagonal washer bolt forming die according to claim 3, characterized in that: A return spring (12) is fixed to the bottom surface of the lower mold (1), the return spring (12) surrounds the top rod (10), and the bottom end of the return spring (12) is fixedly connected to the top surface of the bottom plate (11).

5. The high-precision hexagonal washer bolt forming die according to claim 1, characterized in that: The left and right sides of the outer wall of the hexagonal tool (5) are respectively provided with thread grooves (13), and the left and right sides of the outer wall of the upper mold (3) are respectively provided with second threaded holes (14), and the two second threaded holes (14) are respectively threadedly connected with bolt bodies (15), and the threaded ends of the two bolt bodies (15) are respectively threadedly connected with the inner parts of the two thread grooves (13).

6. The high-precision hexagonal washer bolt forming die according to claim 5, characterized in that: Washers (16) are respectively provided between the two bolt bodies (15) and the upper mold (3).

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