Hexagon bolt hot upsetting die

Abstract

The utility model relates to the technical field of electric power fittings, in particular to a hexagon bolt hot upsetting die which comprises an upper workbench and a lower workbench, and is characterized in that guide pieces extending in the vertical direction are symmetrically arranged between the upper workbench and the lower workbench, the upper workbench is in sliding connection with the guide pieces, and the lower workbench is fixedly connected with the guide pieces; a punch is fixedly connected to the lower end face of the upper workbench, a hot upsetting forming die sleeve is arranged in the lower workbench, the punch and the hot upsetting forming die sleeve are coaxially arranged, and the hot upsetting forming die sleeve comprises a hexagonal die and a center die which are assembled. The hexagonal die is used for hot upsetting forming of the hexagonal part of the head of the bolt, the center die is used for hot upsetting forming of the rod diameter part of the bolt, die replacement can be conducted more efficiently and conveniently, the replacement and maintenance cost is reduced, and the production efficiency and the automation degree are improved.

Description

Technical Field

[0001] This utility model relates to the field of power fittings technology, and in particular to a hot upsetting mold for hexagonal bolts. Background Technology

[0002] In the power fittings manufacturing industry, hexagonal bolts are common connecting parts. Their production process requires hot upsetting to form a standard hexagonal head. Traditional molds require replacing the entire set of molds when producing hexagonal bolts of different specifications, which is not only complicated to operate but also costly, affecting production efficiency. Standard hexagonal bolts of different specifications from M36 to M24 all adopt a hexagonal head design. The main difference is the size of the opposite sides. The size of the opposite sides of M36 is larger than that of other specifications. Therefore, it is particularly important to find out whether hot upsetting of bolts of different specifications can be achieved simply by changing the head molds of M36, M30, M27, and M24 bolts.

[0003] A search revealed that invention patent document CN110883215A discloses a bolt stamping die, including an electric telescopic rod, a cylinder, a die pad, a track, a slider, a pin, and a fixing block. When the die needs to be replaced, the pin is pulled out, and the die can be moved away by a transmission device. The die moves along the slot of the die pad. When the size of the die is different from the previous one, the height of the die pad can be adjusted by the electric telescopic rod, and the distance between the two fixing blocks can be controlled by the cylinder to better clamp the die, thus achieving the purpose of easy die replacement.

[0004] However, it still has some shortcomings in use: the mold contains multiple mechanical parts such as electric telescopic rods, cylinders, sliders, gears, etc., which increases the complexity of the whole system, makes maintenance and repair more difficult, increases operating costs, and the failure of any part may cause the entire mold to stop working, affecting production efficiency. Therefore, it is particularly important to make mold replacement simpler and reduce replacement and maintenance costs. Summary of the Invention

[0005] The purpose of this invention is to provide a hot upsetting mold for hexagonal bolts, which enables more efficient and convenient mold replacement, reduces replacement and maintenance costs, and improves production efficiency and automation.

[0006] The present invention adopts the following technical solution:

[0007] A hot upsetting die for hexagonal bolts includes an upper workbench and a lower workbench, and is characterized in that: guiding members extending in the up-down direction are symmetrically arranged between the upper workbench and the lower workbench. The upper workbench is slidably connected to the guiding members, and the lower workbench is fixedly connected to the guiding members; a punch is fixedly connected to the lower end surface of the upper workbench, and a hot upsetting forming die sleeve is arranged inside the lower workbench. The punch and the hot upsetting forming die sleeve are coaxially arranged. The hot upsetting forming die sleeve includes an assembled hexagonal die and a center die; the hexagonal die is used for hot upsetting and forming the hexagonal part of the bolt head, and the center die is used for hot upsetting and forming the rod diameter part of the bolt.

[0008] Further, the hot upsetting forming die sleeve further includes a center gasket for fixing the relative positions of the hexagonal die and the center die. The center gasket is located on the upper end surface of the lower workbench and surrounds the hexagonal die.

[0009] Further, the center gasket is in a "convex" - shaped structure with an opening in the middle. At least one through - hole is circumferentially arranged at the lower part of the center gasket, and a fastener is fixedly connected to the upper end of the lower workbench through the through - hole.

[0010] Further, a hexagonal die sleeve is arranged outside the hexagonal die, and a center die sleeve is arranged outside the center die.

[0011] Further, an insert block is also arranged inside the lower workbench, and the hexagonal die, the center die, the hexagonal die sleeve and the center die sleeve are placed inside the insert block.

[0012] Further, the punch is in a conical structure with a larger upper part and a smaller lower part, and the size of the bottom of the punch is the same as the size of the hexagonal die.

[0013] Further, a supporting mechanism is also included. The supporting mechanism is located below the lower workbench. The supporting mechanism includes a top rod and a lower top plate. The guiding member penetrates through the lower top plate. The upper end surface of the top rod is located at the lower end surface of the screw of the processed hexagonal bolt, and the lower end of the top rod is fixedly connected to the lower top plate.

[0014] Further, a downward - extending top rod sleeve is also arranged inside the lower workbench, and the top rod penetrates through the top rod sleeve.

[0015] Further, the top rod sleeve is located at the lower end of the insert block.

[0016] Further, the top rod and the lower top plate are fixedly connected by a clamping block, and the guiding member is threadedly connected to the lower top plate.

[0017] The utility model has the following beneficial effects:

[0018] 1) The mold consists of an upper worktable, a lower worktable, guide components, a punch, and a hot upsetting die sleeve (including a hexagonal die, a center die, and a center washer). The components fit together tightly, ensuring that the hexagonal part of the bolt head and the shank diameter can be hot upset accurately and efficiently. This modular design makes mold replacement simpler and reduces replacement and maintenance costs.

[0019] 2) The central shim ensures the fixed relative position between the hexagonal mold and the central mold, thereby improving the accuracy and consistency of bolt forming. The central shim is designed with a "convex" shaped structure and has through holes for easy installation and fixing, enhancing the stability and durability of the mold;

[0020] 3) Inserts are set inside the lower worktable, and the hot forging die is placed inside the inserts. This modular design facilitates the replacement and maintenance of the die, reduces production costs, and improves production efficiency.

[0021] 4) The punch adopts a tapered structure that is larger at the top and smaller at the bottom, with the bottom size matching the hexagonal die. This design facilitates the punch's smooth entry into and filling of the hexagonal die during the hot forging process, ensuring the integrity and quality of the bolt head forming.

[0022] 5) The support mechanism includes a push rod and a lower top plate. The guide piece passes through the lower top plate. The upper end face of the push rod is located at the lower end face of the hexagonal bolt shank diameter being processed, ensuring that the bolt can be smoothly ejected after hot forging, avoiding the bolt from getting stuck in the mold, thus improving production efficiency and automation.

[0023] 6) The guide and the lower top plate are connected by threads. By adjusting the height of the lower top plate, the height of the top rod can be adjusted, thus making it suitable for processing hexagonal bolts with various rod diameters and lengths, expanding the range of bolt processing.

[0024] In summary, this utility model adopts a modular design, which not only ensures the accuracy of hot-forged hexagonal bolts, but also facilitates mold replacement and maintenance, thereby reducing production costs and improving production efficiency. Attached Figure Description

[0025] Figure 1 This is a cross-sectional view of the present invention;

[0026] Figure 2 This is a schematic diagram of the structure of this utility model;

[0027] Figure 3 This is a schematic diagram of the hexagonal mold structure of this utility model.

[0028] In the diagram, 1. Upper worktable; 2. Punch; 3. Guide component; 4. Hexagonal die; 5. Hexagonal die sleeve; 6. Center die; 7. Center die sleeve; 8. Center gasket; 9. Insert; 10. Lower worktable; 11. Ejector rod; 12. Ejector rod sleeve; 13. Lower top plate; 14. Clamping block; 15. Upper die sleeve. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Those skilled in the art should understand that the embodiments described below are only some, not all, of the embodiments disclosed in this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0030] The following describes various non-limiting embodiments of this utility model. Any number of elements in the accompanying drawings is for illustrative purposes only and not for limitation, and any naming is for distinction only and has no limiting meaning.

[0031] The principles and spirit of this utility model will be explained in detail below with reference to several representative embodiments.

[0032] like Figures 1 to 3 As shown, the hexagonal bolt hot upsetting die of this utility model includes an upper worktable 1 and a lower worktable 10. Guide members 3 extending vertically are symmetrically arranged between the upper worktable 1 and the lower worktable 10. The upper worktable 1 and the guide members 3 are slidably connected, and the lower worktable 10 and the guide members 3 are fixedly connected. The guide members 3 can effectively ensure the vertical displacement accuracy during the hot upsetting of hexagonal bolts, thereby ensuring the processing quality of hexagonal bolts. In this embodiment, the number of guide members 3 is at least two, and the guide members 3 are preferably guide rods.

[0033] A punch 2 is provided on the lower end face of the upper worktable 1. An upper die sleeve 15 is provided around the outside of the punch 2. Bolt holes are provided around the upper die sleeve 15. Bolts pass through the bolt holes on the upper die sleeve 15 to fix the punch 2 to the upper worktable 1. A hot upsetting die sleeve is provided inside the lower worktable 10. The punch 2 and the hot upsetting die sleeve are coaxially arranged. Specifically, the hot upsetting die sleeve includes an assembled hexagonal die 4 and a center die 6. The hexagonal die 4 is used for hot upsetting of the hexagonal part of the bolt head, and the center die 6 is used for hot upsetting of the bolt shank diameter. This arrangement effectively replaces the overall hexagonal bolt mold with the assembled hexagonal die 4 and center die 6, making them two independent parts, simplifying the hot upsetting mold. In case of failure, the hexagonal die 4 or the center die 6 can be repaired separately, saving maintenance costs.

[0034] Further, the hot upsetting forming die sleeve further includes a center gasket 8 for fixing the relative positions of the hexagonal die 4 and the center die 6. The center gasket 8 is located on the upper end surface of the lower workbench 10 and surrounds the hexagonal die 4, which can effectively ensure the fixed relative positions between the hexagonal die 4 and the center die 6, thereby improving the precision and consistency of bolt forming.

[0035] Furthermore, the center gasket 8 is in a "convex" - shaped structure with an opening in the middle. At least one through - hole is circumferentially arranged at the lower part of the center gasket 8. The fastener is fixedly connected to the upper end of the lower workbench 10 through the through - hole. The fastener can be a bolt, which is beneficial to ensuring the position precision of the hexagonal die 4 and the center die 6, and enhancing the stability and durability of the die.

[0036] In this embodiment, an insert 9 is further arranged inside the lower workbench 10. The hexagonal die 4 and the center die 6 are placed inside the insert 9. This modular design facilitates the replacement and maintenance of the standard hexagonal bolt dies of two different specifications, M36 and M24, reduces production costs, and improves production efficiency.

[0037] Further, a hexagonal die sleeve 5 is arranged outside the hexagonal die 4 and a center die sleeve 7 is arranged outside the center die 6, which can effectively protect the hexagonal die 4 and the center die 6 from the direct action of high temperature and impact, and extend the service life of the die. The hexagonal die sleeve 5 and the center die sleeve 7 are also placed inside the insert 9.

[0038] In this embodiment, the punch 2 is in a conical structure with a larger upper part and a smaller lower part. The size of the bottom of the punch 2 is the same as that of the hexagonal die 4, which is beneficial for the punch 2 to smoothly enter and fill the hexagonal die 4 during the hot upsetting process; meanwhile, it provides a downward pressure to the hexagonal die 4, which is more beneficial to maintaining stability during the hot upsetting process and ensuring the integrity and quality of the bolt head forming.

[0039] In the present utility model, a support mechanism is further included. The support mechanism is located below the lower workbench 10 and is used to provide support at the lower end of the screw of the hexagonal bolt to ensure the forming of the hexagonal head of the bolt.

[0040] Further, the support mechanism includes a top rod 11 and a lower top plate 13. Among them, the guide part 3 penetrates through the lower top plate 13. The upper end surface of the top rod 11 is located at the lower end surface of the screw of the processed hexagonal bolt to effectively support the lower end of the bolt screw during the hot upsetting process and ensure the hot upsetting processing effect. The lower end of the top rod 11 is fixedly connected to the lower top plate 13 to ensure the stability of the device.

[0041] Meanwhile, a top rod sleeve 12 is further arranged inside the lower workbench 10. The top rod sleeve 12 extends downward from the lower end of the insert 9. The top rod 11 penetrates through the top rod sleeve 12, which provides a stable guiding function for the top rod 11 and further enhances the overall stability and durability of the die.

[0042] Furthermore, the top rod 11 and the lower top plate 13 are fixedly connected by a locking block 14. This connection method is simple, quick, and stable and reliable.

[0043] Furthermore, the guide 3 and the lower top plate 13 are connected by threads. By adjusting the height of the lower top plate 13, the height of the top rod 11 can be adjusted, thus making it suitable for processing hexagonal bolts with various rod diameters and lengths, expanding the range of bolt processing.

[0044] Overall, the design of this hexagonal bolt hot upsetting die has many beneficial effects, such as compact structure, clear function, high forming accuracy, modular design for easy maintenance, mold protection, reasonable punch design, ingenious support mechanism design, and stable connection, which can significantly improve the production efficiency and quality of bolts.

[0045] Based on the above description in this specification, those skilled in the art will also understand that terms used, such as "upper," "lower," "inner," and "outer," which indicate orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings of this specification. They are only for the purpose of facilitating the explanation of the present invention and simplifying the description, and do not imply that the device or element involved must have the specific orientation, or be constructed and operated in a specific orientation. Therefore, the above-mentioned orientation or positional relationship terms should not be understood or interpreted as a limitation on the present invention.

[0046] In addition, in the description of this specification, "multiple" means at least two, such as two, three or more, etc., unless otherwise expressly and specifically defined.

Claims

1. A hot upsetting die for hexagonal bolts, comprising an upper worktable and a lower worktable, characterized in that: There are symmetrically arranged guiding members extending in the up-and-down direction between the upper workbench and the lower workbench. The upper workbench is slidably connected to the guiding members, and the lower workbench is fixedly connected to the guiding members. A punch is fixedly connected to the lower end face of the upper workbench. A hot upsetting forming die sleeve is arranged inside the lower workbench. The punch and the hot upsetting forming die sleeve are coaxially arranged. The hot upsetting forming die sleeve includes an assembled hexagonal die and a center die. The hexagonal die is used for hot upsetting the hexagonal part of the bolt head, and the center die is used for hot upsetting the rod diameter part of the bolt.

2. The hexagonal bolt hot upsetting die according to claim 1, characterized in that: The hot upsetting forming die sleeve further includes a center gasket for fixing the relative positions of the hexagonal die and the center die. The center gasket is located on the upper end face of the lower workbench and surrounds the hexagonal die.

3. The hexagonal bolt hot upsetting die according to claim 2, characterized in that: The center gasket is in a "convex" shape with an opening in the middle. At least one through hole is circumferentially arranged at the lower part of the center gasket. The fastener is fixedly connected to the upper end of the lower workbench through the through hole.

4. The hexagonal bolt hot upsetting die according to claim 1, characterized in that: A hexagonal die sleeve is arranged outside the hexagonal die, and a center die sleeve is arranged outside the center die.

5. A hexagonal bolt hot upsetting die according to claim 4, characterized in that: An insert block is further arranged inside the lower workbench. The hexagonal die, the center die, the hexagonal die sleeve and the center die sleeve are placed inside the insert block.

6. A hexagonal bolt hot upsetting die according to claim 1, characterized in that: The punch is in a conical structure with a larger upper part and a smaller lower part. The size of the bottom of the punch is the same as that of the hexagonal die.

7. A hexagonal bolt hot upsetting die according to claim 1, characterized in that: It further includes a support mechanism. The support mechanism is located below the lower workbench. The support mechanism includes a ejector rod and a lower top plate. The guiding member penetrates through the lower top plate. The upper end face of the ejector rod is located at the lower end face of the screw rod of the processed hexagonal bolt. The lower end of the ejector rod is fixedly connected to the lower top plate.

8. A hexagonal bolt hot upsetting die according to claim 7, characterized in that: A downwardly extending ejector rod sleeve is further arranged inside the lower workbench. The ejector rod penetrates through the ejector rod sleeve.

9. A hexagonal bolt hot upsetting die according to claim 8, characterized in that: The ejector rod sleeve is located at the lower end of the insert block.

10. A hexagonal bolt hot upsetting die according to claim 8, characterized in that: The ejector rod and the lower top plate are fixedly connected by a clamping block, and the guiding member is threadedly connected to the lower top plate.

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