Ring part forging forming lower die structure

Abstract

The utility model relates to a ring part forging forming lower die structure which comprises a base plate and a lower die base installed on the base plate, a forming groove is formed in the upper portion of the lower die base, a material ejecting groove is formed in the lower portion of the lower die base, and a die core through hole communicating the forming groove with the material ejecting groove is formed in the bottom of the forming groove. A lower mold core is inserted into the mold core through hole, the mold core through hole is a trumpet-shaped through hole with the upper end diameter larger than the lower end diameter, the lower mold core comprises a rod part and a forming part fixed to the upper end of the rod part, and the forming part is of an inverted-circular-truncated-cone-shaped structure with the upper end diameter larger than the lower end diameter; after the lower die core is inserted into the die core through hole, the top end of the forming part protrudes out of the bottom of the forming groove for workpiece forming, and the lower end of the rod part extends into the jacking groove. The lower die core and the ejector rod are not connected, the lower die core can be replaced at any time, when the lower die core cannot be separated from a workpiece due to the too high temperature, a new lower die core can be replaced in the die core through hole to continue forging forming work, and the work efficiency of workpiece forging is greatly improved.

Description

Technical Field

[0001] This utility model relates to the field of forging production technology, and in particular to a lower die structure for forging ring-shaped parts. Background Technology

[0002] In the forging process of ring-shaped parts, the upper and lower dies of a press are used to achieve forging and forming. Currently, the lower die consists of a lower die base and a lower die core located within the lower die base. The lower die core is connected to an ejector rod below for ejecting the workpiece. After the workpiece is formed, the ejector rod moves upward to push the workpiece out of the cavity. During multiple forging processes, the temperature of the lower die core gradually increases, making it easy for the workpiece to stick to the lower die core, resulting in workpiece demolding failure. Demolding requires waiting for the workpiece and lower die core to cool down, significantly reducing the processing efficiency of workpiece forging. Therefore, there is an urgent need for a lower die structure that can solve the above problems to improve the processing efficiency of workpiece forging. Utility Model Content

[0003] This utility model addresses the shortcomings of existing technologies by providing a lower die structure for forging ring-shaped parts.

[0004] This utility model is achieved through the following technical solution: a lower die structure for forging ring-shaped parts is provided, including a backing plate and a lower die base mounted on the backing plate. A forming groove is provided on the upper part of the lower die base, and an ejector groove is provided on the lower part of the lower die base. A die core through hole is provided at the bottom of the forming groove, connecting the forming groove and the ejector groove. A lower die core is inserted into the die core through hole, which is a funnel-shaped through hole with an upper diameter larger than the lower diameter. The lower die core includes a rod and a forming part fixed to the upper end of the rod. The forming part is an inverted frustum-shaped structure with an upper diameter larger than the lower diameter. After the lower die core is inserted into the die core through hole, the top end of its forming part protrudes from the bottom of the forming groove for workpiece forming, and the lower end of its rod extends into the ejector groove.

[0005] Preferably, an ejector through-hole is provided on the backing plate, and an ejector rod is inserted into the ejector through-hole. The lower end of the ejector rod is connected to the drive mechanism, which drives the ejector rod to move up and down. The upward movement of the ejector rod pushes the lower mold core upward, and the upward movement of the lower mold core pushes the workpiece out of the forming groove to achieve workpiece demolding.

[0006] Preferably, the upper diameter of the ejector through hole is larger than the lower diameter, which can effectively avoid the problem of deformation of the ejector through hole hindering the upward movement of the ejector rod due to the deformation and sinking of the backing plate caused by multiple forgings. This can ensure the stable upward movement of the ejector rod and ensure normal demolding of the workpiece.

[0007] Preferably, during the forging process, the center of the backing plate is most prone to deformation. The backing plate includes an inner core and a sleeve fitted over the outer core, with the ejector hole located on the core. By designing the backing plate as a separate inner and outer structure, only the core needs to be replaced when the core deforms, eliminating the need to replace the entire backing plate.

[0008] Preferably, an installation hole is provided inside the plate sleeve, a limiting protrusion is provided at the bottom of the side wall of the installation hole, and a limiting pressure plate is provided on the outer periphery of the plate core. The plate core is embedded in the installation hole, and the limiting pressure plate presses on the limiting protrusion.

[0009] The beneficial effects of this utility model are as follows:

[0010] 1. In this utility model, the lower die core and the ejector rod are not connected, and the lower die core can be replaced at any time. When the lower die core cannot be separated from the workpiece due to excessive temperature, a new lower die core can be replaced in the die core through hole to continue the forging and forming work. There is no need to wait for the lower die core and the workpiece to cool down and be demolded, which greatly improves the work efficiency of workpiece forging.

[0011] 2. Compared with straight holes, the funnel-shaped mold core through hole of this utility model will not affect the upward movement of the lower mold core due to deformation, thus ensuring stable demolding of the workpiece. Attached Figure Description

[0012] Figure 1 This is a longitudinal sectional view of the present invention.

[0013] Figure 2 This is a longitudinal sectional view of the lower mold base of this utility model.

[0014] Figure 3 This is a schematic diagram of the structure of the lower mold core of this utility model;

[0015] Figure 4 This is a longitudinal sectional view of the pad of this utility model;

[0016] Figure 5 This is a schematic diagram of the structure of the top material rod of this utility model;

[0017] As shown in the figure:

[0018] 1. Pad, 2. Lower mold base, 3. Forming groove, 4. Ejector groove, 5. Mold core through hole, 6. Lower mold core, 61. Rod, 62. Forming part, 7. Ejector through hole, 8. Ejector rod, 9. Upper mold, 11. Plate core, 12. Plate sleeve, 13. Limiting protrusion, 14. Limiting pressure table. Detailed Implementation

[0019] To clearly illustrate the technical features of this solution, the following detailed implementation method will be used to explain the solution.

[0020] like Figure 1-5As shown, this utility model includes a base plate 1 and a lower mold base 2 mounted on the base plate 1. A forming groove 3 is provided on the upper part of the lower mold base 2, and an ejector groove 4 is provided on the lower part of the lower mold base 2. A mold core through hole 5 is provided at the bottom of the forming groove 3, connecting the forming groove 3 and the ejector groove 4. A lower mold core 6 is inserted into the mold core through hole 5. The mold core through hole 5 is a funnel-shaped through hole with an upper diameter larger than the lower diameter. The lower mold core 6 includes a rod portion 61 and a forming portion 62 fixed to the upper end of the rod portion 61. The forming portion 62 is an inverted frustum-shaped structure with an upper diameter larger than the lower diameter. After the lower mold core 6 is inserted into the mold core through hole 5, the top end of its forming portion 62 protrudes from the bottom of the forming groove 3 for workpiece forming, and the lower end of its rod portion 61 extends into the ejector groove 4.

[0021] An ejector through-hole 7 is provided on the pad 1, and an ejector rod 8 is inserted into the ejector through-hole 7. The lower end of the ejector rod 8 is connected to the drive mechanism. The drive mechanism drives the ejector rod 8 to move up and down. The upward movement of the ejector rod 8 pushes the lower mold core 6 upward, and the upward movement of the lower mold core 6 pushes the workpiece out of the forming groove 3, thus achieving workpiece demolding. The drive mechanism adopts an existing structure, and its details will not be elaborated here. The upper diameter of the ejector through-hole 7 is larger than the lower diameter, which can effectively avoid the problem that the ejector through-hole 7 will deform and hinder the upward movement of the ejector rod 8 due to the deformation and sinking of the pad 1 caused by multiple forgings. This ensures that the ejector rod 8 moves upward stably and ensures normal workpiece demolding.

[0022] During the forging process, the middle part of the pad 1 is most prone to deformation. The pad 1 includes a core 11 located inside and a sleeve 12 sleeved on the outside of the core 11. The pad 1 is set as an inner and outer split structure. When the core 11 is deformed, only the core 11 needs to be replaced, and the entire pad 1 does not need to be replaced.

[0023] An installation hole is provided inside the plate sleeve 12, and a limiting protrusion 13 is provided at the bottom of the side wall of the installation hole. A limiting pressure plate 14 is provided around the outer periphery of the plate core 11. The plate core 11 is embedded in the installation hole, and the limiting pressure plate 14 presses on the limiting protrusion 13. The top material through hole 7 is provided on the plate core 11. In this embodiment, the plate core 11 is 5CrNiMo steel with high hardness.

[0024] In practice, an upper die 9 that can move up and down is set above the lower die base 2. The upper die 9 moves down and cooperates with the lower die base 2 and the lower die core 6 to form a forming cavity for workpiece forming. The upper die 9 moves down multiple times to forge the workpiece and form it. After the workpiece is formed, the ejector rod 8 is controlled to move up, pushing the lower die core 6 and the workpiece to move up. Then, the workpiece is removed by a worker or robot. If the temperature of the lower die core 6 is too high due to multiple forgings, causing the lower die core 6 to be unable to separate from the workpiece, the workpiece and the lower die core 6 are removed at the same time (separated after the temperature of the workpiece and the lower die core 6 decreases). Then, a new lower die core 6 is reinserted into the die core through hole 5 to continue the workpiece forging and forming work. There is no need to wait for the workpiece and the lower die core 6 to cool down before demolding, which greatly improves the processing efficiency of workpiece forging.

[0025] In this invention, the lower die core 6 and the ejector rod 8 are not connected, allowing the lower die core 6 to be replaced at any time. If the lower die core 6 becomes too hot to detach from the workpiece, a new lower die core 6 can be replaced within the die core through hole 5 to continue the forging process. This eliminates the need to wait for the lower die core 6 and the workpiece to cool and demold, significantly improving the efficiency of workpiece forging. Compared to a straight hole, the flared die core through hole 5 prevents deformation from affecting the upward movement of the lower die core 6, ensuring stable demolding of the workpiece.

[0026] Of course, the above description is not limited to the examples above. Technical features of this utility model not described can be implemented by or using existing technology, and will not be repeated here. The above embodiments and drawings are only used to illustrate the technical solution of this utility model and are not intended to limit this utility model. This utility model has been described in detail with reference to preferred embodiments. Those skilled in the art should understand that any changes, modifications, additions or substitutions made by those skilled in the art within the scope of this utility model do not depart from the spirit of this utility model and should also fall within the protection scope of the claims of this utility model.

Claims

1. A ring-shaped part swage forming lower die structure, characterized by: The device comprises a base plate and a lower die base installed on the base plate, a forming groove is arranged on the upper part of the lower die base, a material pushing groove is arranged on the lower part of the lower die base, a mold core through hole is arranged on the bottom of the forming groove and is communicated with the forming groove and the material pushing groove, a lower mold core is inserted into the mold core through hole, the mold core through hole is a trumpet-shaped through hole with a larger upper end diameter than a lower end diameter, the lower mold core comprises a rod part and a forming part fixed on the upper end of the rod part, the forming part is a rounded table structure with a larger upper end diameter than a lower end diameter, and the top end of the forming part of the lower mold core protrudes from the bottom of the forming groove for workpiece forming after the lower mold core is inserted into the mold core through hole, and the lower end of the rod part of the lower mold core extends into the material pushing groove.

2. A ring-shaped part swage forming lower die structure according to claim 1, characterized in that: A material pushing through hole is arranged on the base plate, and a material pushing rod is inserted into the material pushing through hole.

3. A ring-shaped part swage forming lower die structure according to claim 2, characterized in that: The upper end diameter of the material pushing through hole is larger than the lower end diameter.

4. A ring-shaped part swage forming lower die structure according to claim 1, characterized in that: The base plate comprises a plate core arranged inside and a plate sleeve arranged outside the plate core, and the material pushing through hole is arranged on the plate core.

5. A ring-shaped part swage forming lower die structure according to claim 4, characterized in that: An installation hole is arranged in the plate sleeve, a limiting protrusion is arranged on the bottom of the side wall of the installation hole, a limiting pressing table is arranged on the outer periphery of the plate core, the plate core is embedded in the installation hole, and the limiting pressing table is pressed on the limiting protrusion.

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