One-way closed gear forging die structure

Abstract

The utility model discloses a one-way closed gear forging die structure, which belongs to the technical field of gear forging, solves the problems of waste of raw materials and increase of production cost caused by the fact that metal flows out of die gaps to form flashes in the process of forging the raw materials into gears by an existing device, and comprises a fixed base, a floating die plate is arranged on the top face of the fixed base, a spring seat is arranged between the fixed base and the floating die plate, a female die is fixedly installed on the top face of the floating die plate, a tooth-shaped die is arranged on the top face of the female die, die cavities are formed in the adjacent faces of the female die and the tooth-shaped die, and the top end of a female die core rod penetrates through a receding hole and extrudes the bottom of raw materials in the female die. And meanwhile, the tooth-shaped die core rod extrudes the top of the raw material, so that the raw material can be extruded in the die cavities of the female die and the tooth-shaped die, the situation that the raw material flows out of a gap between the female die and the tooth-shaped die can be avoided, waste of the raw material is avoided, and then the production cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of gear forging technology, specifically to a one-way closed gear forging die structure. Background Technology

[0002] Gear forging dies are forging tools used to manufacture gears. During the forging process, these dies can cause plastic deformation of the blank, thereby obtaining gear forgings of the required shape and size.

[0003] According to the search, the patent application with patent number 202221824376.0 discloses a gear forging die, including a die cover plate, a gear-shaped forging die body, a support platform and an enlarged foot. The gear-shaped forging die body is welded to the top of the support platform. The outer surface of the gear-shaped forging die body is electroplated with a reinforcing layer. A circular groove is provided in the gear-shaped forging die body. Limiting rods that prevent displacement during forging are welded at equal intervals on the outer side of the circular groove, and the top of the limiting rods penetrates the gear-shaped forging die body.

[0004] Although the gear forging die uses equally spaced limiting rods to limit the gear-shaped forging die body and prevent displacement during forging, metal will flow out from the die gaps and form flash during the forging process, resulting in waste of raw materials and increased production costs.

[0005] Therefore, we propose a unidirectional blocking gear forging die structure. Utility Model Content

[0006] To address the shortcomings of existing technologies, this utility model provides a unidirectional closed gear forging die structure, which solves the problem that in the process of forging raw materials into gears, metal will flow out from the die gap to form flash, resulting in waste of raw materials and increased production costs.

[0007] To achieve the above objectives, this utility model is implemented through the following technical solution: a one-way blocking gear forging mold structure, including a fixed base, a floating template provided on the top surface of the fixed base, a spring seat provided between the fixed base and the floating template, a concave mold fixedly installed on the top surface of the floating template, a toothed mold provided on the top surface of the concave mold, and a mold cavity provided on the adjacent side of the concave mold and the toothed mold.

[0008] A die core is provided in the middle of the floating template and the die. Both the floating template and the die have cavities that match the contour of the die core. The die core is movably fitted inside the cavity. The bottom surface of the die cavity has a relief hole that communicates with the cavity. The top of the die core is movably fitted inside the relief hole. A toothed die core is fixedly installed in the middle of the top surface of the toothed die cavity.

[0009] Preferably, a material ejection hole is provided through the middle of the bottom surface of the fixed base, and a material ejection ejector rod is fixedly installed inside the material ejection hole. The top end of the material ejector rod is fixedly installed on the bottom surface of the die core rod. After casting is completed, the tooth mold is moved upward, and then the operator presses the floating template downward, which can make the top end of the die core rod pass through the relief hole and eject the gear inside the die.

[0010] Preferably, the top surface of the fixed base is provided with mounting grooves around all four sides, and the bottom surface of the floating template is provided with storage grooves of the same number as the mounting grooves around all four sides. A guide hole is provided in the center of the top surface of the storage groove to facilitate the installation of the spring seat.

[0011] Preferably, the spring seat includes a mounting base fixedly fitted inside the mounting groove, and a guide rod is fixedly installed in the middle of the top surface of the mounting base. The top end of the guide rod passes through the receiving groove and slides inside the guide hole, so that the floating template can only move along the outer wall of the guide rod.

[0012] Preferably, the outer ring of the guide rod is provided with a return spring. The bottom end of the return spring is fixedly installed on the bottom surface of the mounting base, and the top end of the return spring is fixedly installed on the top surface of the storage groove. The return spring can provide certain support for the floating template. When the external extrusion pressure is released, the return spring can push the floating template and the concave mold and toothed mold on its top surface upward.

[0013] This invention provides a unidirectional blocking gear forging die structure. It has the following beneficial effects:

[0014] This one-way closed gear forging die structure uses a press to push the toothed die downwards. The toothed die and its mandrel move downwards, along with the concave die and floating template. During this process, the return spring is compressed, and the top of the concave die mandrel passes through the clearance hole and squeezes the bottom of the raw material inside the concave die. Simultaneously, the toothed die mandrel squeezes the top of the raw material, thus confining the material within the cavities of the concave and toothed dies. This prevents the material from flowing out of the gaps between the concave and toothed dies, avoiding flash on the gears. This helps prevent waste of raw materials, thereby reducing production costs. It solves the problem in existing devices where metal flows out of the die gaps during gear forging, forming flash, leading to material waste and increased production costs. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0017] Figure 3This is a cross-sectional structural diagram of the concave mold and the toothed mold of this utility model;

[0018] Figure 4 This is a schematic diagram of the die core rod and ejector pin structure of this utility model.

[0019] In the diagram: 1. Fixed base; 11. Mounting slot; 12. Unloading hole; 2. Spring seat; 21. Mounting seat; 22. Guide rod; 23. Reset spring; 3. Floating template; 31. Storage slot; 32. Guide hole; 4. Die cavity; 41. Relief hole; 5. Toothed die; 51. Toothed die core rod; 6. Die cavity core rod; 7. Unloading ejector rod. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example 1

[0021] like Figure 1-4 As shown: The system includes a fixed base 1, a floating template 3 on the top surface of the fixed base 1, a spring seat 2 between the fixed base 1 and the floating template 3, a die 4 fixedly mounted on the top surface of the floating template 3, a toothed mold 5 on the top surface of the die 4, and mold cavities on adjacent sides of the die 4 and the toothed mold 5. A die core 6 is located in the middle of the floating template 3 and the die 4, and both the floating template 3 and the die 4 have cavities matching the contour of the die core 6. The die core 6 is movably fitted inside the cavity. A clearance hole 41 communicating with the cavity is opened on the bottom surface of the cavity of the die 4, and the top end of the die core 6 is movably fitted inside the clearance hole 41. A toothed mold core 51 is fixedly mounted in the middle of the top surface of the cavity of the toothed mold 5. A material ejection hole 12 is provided through the middle of the bottom surface of the fixed base 1. A material ejection rod 7 is fixedly installed inside the material ejection hole 12. The top end of the material ejection rod 7 is fixedly installed on the bottom surface of the die core rod 6. The toothed die 5 is pressed down by the press, and then the toothed die 5 and the toothed die core rod 51 move down, taking the die 4 and the floating template 3 down with them. During this process, the return spring 23 is compressed, and then the top end of the die core rod 6 passes through the relief hole 41 and squeezes the bottom of the material inside the die 4. At the same time, the toothed die core rod 51 squeezes the top of the material, which can squeeze the material into the mold cavity of the die 4 and the toothed die 5. This can prevent the material from flowing out from the gap between the die 4 and the toothed die 5, and achieve the purpose of avoiding flash on the gear. Example 2

[0022] like Figure 1-2 As shown: The top surface of the fixed base 1 has mounting grooves 11 on all four sides. The bottom surface of the floating template 3 has storage grooves 31 on all four sides, corresponding to the mounting grooves 11 and in the same number. The top surface of the storage groove 31 has a guide hole 32 in the middle. The spring seat 2 includes a mounting seat 21 fixedly fitted inside the mounting groove 11. A guide rod 22 is fixedly installed in the middle of the top surface of the mounting seat 21. The top end of the guide rod 22 passes through the storage groove 31 and slides inside the guide hole 32. A return spring 23 is provided on the outer ring of the guide rod 22. The bottom end of the return spring 23 is fixedly installed on the bottom surface of the mounting seat 21, and the top end of the return spring 23 is fixedly installed on the top surface of the storage groove 31. The return spring 23 can provide a certain support for the floating template 3. When the external pressure is released, the return spring 23 can push the floating template 3 and its top surface concave mold 4 and toothed mold 5 upward.

[0023] The working principle and usage process of this utility model: In use, the toothed die 5 is installed at the output end of the press, and the raw material is placed inside the die cavity 4. Then, the press pushes the toothed die 5 downward, and the toothed die 5 and the toothed die mandrel 51 move downward, taking the die cavity 4 and the floating template 3 with them. During this process, the return spring 23 is compressed, and then the top of the die mandrel 6 passes through the relief hole 41 and squeezes the bottom of the raw material inside the die cavity 4. At the same time, the toothed die mandrel 51 squeezes the top of the raw material, thus squeezing the raw material into the mold cavity of the die cavity 4 and the toothed die 5. After the press reaches the set stroke, the raw material can be forged into a gear. Then, the press returns and drives the spring seat 2 to move to the upper dead point set by the equipment. Then, the die cavity 4 and the floating template 3 return to the initial position under the elastic force of the return spring 23, and then the gear can be taken out.

[0024] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0025] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A unidirectional blocking gear forging die structure, characterized in that: Includes a fixed base (1), a floating template (3) is provided on the top surface of the fixed base (1), a spring seat (2) is provided between the fixed base (1) and the floating template (3), a concave mold (4) is fixedly installed on the top surface of the floating template (3), a toothed mold (5) is provided on the top surface of the concave mold (4), and a mold cavity is provided on the adjacent side of the concave mold (4) and the toothed mold (5); The floating template (3) and the die (4) are provided with a die core rod (6) in the middle. The floating template (3) and the die (4) are both provided with cavities that match the contour of the die core rod (6). The die core rod (6) is movably fitted inside the cavity. The bottom surface of the die cavity of the die (4) is provided with a relief hole (41) that communicates with the cavity. The top of the die core rod (6) is movably fitted inside the relief hole (41). The toothed die core rod (51) is fixedly installed in the middle of the top surface of the toothed die (5).

2. The unidirectional blocking gear forging die structure according to claim 1, characterized in that: The fixed base (1) has a material ejection hole (12) through the middle of its bottom surface. A material ejection rod (7) is fixedly installed inside the material ejection hole (12). The top end of the material ejection rod (7) is fixedly installed on the bottom surface of the die core rod (6).

3. The unidirectional blocking gear forging die structure according to claim 1, characterized in that: The fixed base (1) has mounting grooves (11) on all four sides of its top surface. The floating template (3) has storage grooves (31) on all four sides of its bottom surface that correspond to the mounting grooves (11) and are the same number as the storage grooves. The storage grooves (31) have guide holes (32) in the middle of their top surfaces.

4. The unidirectional blocking gear forging die structure according to claim 3, characterized in that: The spring seat (2) includes a mounting seat (21) fixedly fitted inside the mounting groove (11). A guide rod (22) is fixedly installed in the middle of the top surface of the mounting seat (21). The top end of the guide rod (22) passes through the storage groove (31) and slides inside the guide hole (32).

5. The gear forging die structure with unidirectional blocking according to claim 4, characterized in that: The outer ring of the guide rod (22) is provided with a reset spring (23). The bottom end of the reset spring (23) is fixedly installed on the bottom surface of the mounting base (21), and the top end of the reset spring (23) is fixedly installed on the top surface of the storage groove (31).

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