Combined double-flange forging die

Abstract

The utility model provides a combined type double-flange forging die which comprises an outer die and an inner die, the outer die comprises a cushion die section and a contact section, the inner diameter of the cushion die section is smaller than that of the contact section, the outer wall of the inner die is attached to the inner wall of the contact section of the outer die, the height of the inner die is the same as that of the contact section, and a split module is arranged on the inner wall of the inner die. The split module is close to the cushion die section, and the inner diameter of the split module is smaller than that of the cushion die section. The outer die and the inner die are arranged, the split die blocks are arranged on the inner die, the U-shaped groove in the middle and the flange structures at the two ends are formed, the weight and material loss of the forge piece are reduced, the production efficiency is high, the rejection rate is low, the follow-up machining cost is saved, cutting and other steps are not conducted in the forming process, fibers in the obtained forge piece are even, and the yield is high. And the strength is higher.

Description

Technical Field

[0001] The utility model relates to the technical field of molds, and particularly relates to a combined double-flange forging die. Background Art

[0002] For double-flange forgings, after the small-head part and the large-head part are respectively formed during processing, the connection between them still needs to be completed by machining. Therefore, the weight of the forging before processing is large, the material loss is also large, the production efficiency is low, the processing cost is increased at the same time, and the fiber structure of the obtained product is inevitably damaged due to subsequent processing, resulting in a reduction in its strength. Summary of the Utility Model

[0003] The technical problem to be solved by the utility model is to overcome the defects existing in the prior art. The utility model provides a combined double-flange forging die, and provides a double-head flange forging die with high production efficiency, low scrap rate and cost saving for subsequent processing.

[0004] To solve the above technical problem, the technical solution adopted by the utility model is: a combined double-flange forging die, including an outer die and an inner die. The outer die includes a pad die section and a contact section. The inner diameter of the pad die section is smaller than that of the contact section. The outer wall of the inner die is attached to the inner wall of the contact section of the outer die. The height of the inner die is the same as that of the contact section. A split module is arranged on the inner wall of the inner die. The split module is close to the pad die section and the inner diameter of the split module is smaller than that of the pad die section.

[0005] Further, the split module successively includes a first inclined section, a vertical section and a second inclined section from top to bottom. The first inclined section and the second inclined section are smoothly connected to both ends of the vertical section. The inclination angle of the first inclined section is greater than that of the second inclined section.

[0006] Further, the split module is arranged at the lower part of the inner wall of the inner die. The inner wall of the part of the inner die above the split module encloses an upper hollow die cavity for forming the upper part of the double flange.

[0007] Further, the lower end face of the split module is attached to the upper end face of the pad die section.

[0008] Further, the lower part of the split module and the inner wall of the pad die section enclose a lower hollow die cavity for forming the lower part of the double flange.

[0009] Further, the inner die is of a split structure and is evenly divided into multiple pieces according to an angle.

[0010] Compared with the prior art, the beneficial effects of the present utility model include: by providing an outer mold and an inner mold, and providing a split module on the inner mold, a U-shaped groove in the middle and flange structures at both ends are formed, reducing the weight of the forging and material loss, having high production efficiency, low rejection rate, saving subsequent processing costs, and the forming process does not go through steps such as cutting, so that the fibers inside the obtained forging are uniform and the strength is higher. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The disclosure of the present utility model will be described with reference to the accompanying drawings. It should be understood that the drawings are only for illustrative purposes and are not intended to limit the scope of protection of the present utility model. In the drawings, the same reference numerals are used to refer to the same components. Among them:

[0012] Figure 1 Schematically shows the sectional structure of the combined double-flange forging die;

[0013] Figure 2 Schematically shows the sectional structure of the outer mold;

[0014] Figure 3 Schematically shows the sectional structure of the inner mold.

[0015] Reference numerals in the figures: 1 - outer mold, 2 - inner mold, 3 - pad mold section, 4 - contact section, 5 - split module, 6 - first inclined section, 7 - vertical flat section, 8 - second inclined section. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0016] It is easily understood that according to the technical solution of the present utility model, without changing the essence of the present utility model, those of ordinary skill in the art can propose various interchangeable structural ways and implementation ways. Therefore, the following detailed embodiments and the accompanying drawings are only illustrative descriptions of the technical solution of the present utility model and should not be regarded as all of the present utility model or as a limitation or restriction on the technical solution of the present utility model.

[0017] Figure 1 Schematically shows the sectional structure of the combined double-flange forging die. A combined double-flange forging die is as Figure 1 shown, including an outer mold 1 and an inner mold 2, Figure 2 Schematically shows the sectional structure of the outer mold. As Figure 2 shown, the outer mold 1 includes a pad mold section 3 and a contact section 4. The inner diameter of the pad mold section 3 is smaller than the inner diameter of the contact section 4, so that the pad mold section 3 protrudes in the inner wall area of the outer mold 1 compared with the contact section 4, and the outer wall of the inner mold 2 is in contact with the inner wall of the contact section 4 of the outer mold 1, and the inner mold 2 is supported by the aforementioned protruding pad mold section 3; it should be noted that the height of the aforementioned inner mold 2 is the same as the height of the contact section 4, so that the upper end surfaces of the outer mold 1 and the inner mold 2 can be in a flush state. Figure 3 Schematically shows the sectional structure of the inner mold. AsFigure 3 As shown, a split module 5 is provided on the inner wall of the inner mold 2. The split module 5 is close to the pad mold section 3 and the inner diameter of the split module 5 is smaller than the inner diameter of the pad mold section 3, so as to meet the requirement that the upper and lower diameters of the double flange are larger than the middle diameter. And the cooperation between the split module 5 and the pad mold section 3 can just meet the requirement of the flange shape at the lower part.

[0018] The following is a specific description of the split module 5. The aforementioned split module 5 successively includes a first inclined section 6, a vertical section 7, and a second inclined section 8 from top to bottom. The first inclined section 6 and the second inclined section 8 are smoothly connected to both ends of the vertical section 7, and the connection can be made in the way of fillets. And the inclination angle of the first inclined section 6 is greater than the inclination angle of the second inclined section 8. For example, in some embodiments, the inclination angle of the second inclined section 8 with respect to the vertical direction is 30°, and the inclination angle of the first inclined section 6 with respect to the vertical direction is 46.5°.

[0019] It should be noted that the aforementioned split module 5 is arranged at the lower part of the inner wall of the inner mold 2. The inner wall of the part of the inner mold 2 above the split module 5 encloses an upper hollow mold cavity for forming the upper part of the double flange; and the lower end surface of the split module 5 is attached to the upper end surface of the pad mold section 3, and the lower end surface of the split module 5 is longer than the upper end surface of the pad mold section 3, so that the lower side of the split module 5 and the inner wall of the pad mold section 3 enclose a lower hollow mold cavity for forming the lower part of the double flange. To facilitate placing the aforementioned inner mold 2 into the outer mold 1, the inner mold 2 can be set as a split structure, evenly divided into multiple pieces according to an angle and then placed into the outer mold 1; in some embodiments, the inner mold 2 can be evenly divided into 3 identical pieces according to 120° and then respectively placed into the outer mold 1, so as to avoid placing the whole inner mold 2 into the outer mold 1. By dividing it into blocks, the setting difficulty of the forging die can be effectively reduced, and the equal-angle setting method can avoid the problem of sequential cooperation between separate blocks of the inner mold 2, further reducing the setting difficulty of the forging die.

[0020] In actual application, first place the outer mold 1 at a fixed position, then successively place the split blocks of the inner mold 2 into the outer mold 1, and after the inner wall of the split blocks of the inner mold 2 is attached to the inner wall of the contact section 4, carry out the forging process. During the forging process, first draw out and roll the forging stock until its height is slightly greater than the height of the outer mold, and then carry out the punching and reaming processes, so that the width of the vertical through hole in the middle of the forging is smaller than the width of its formed part, and the width of the forging is smaller than the minimum width of the inner mold. Place the obtained forging into the die core and then place it into the combined double flange forging die for the forming process. Through further reaming and forging processes, the two sides of the forging placed in the combined double flange forging die gradually adhere to the inner walls of the inner mold and the outer mold and then demold to obtain the double flange forging.

[0021] The technical scope of the present utility model is not limited to the content described above. Those skilled in the art can make various deformations and modifications to the above embodiments without departing from the technical idea of the present utility model, and these deformations and modifications shall fall within the protection scope of the present utility model.

Claims

1. A combined double-flange forging die, characterized in that, It includes an outer mold (1) and an inner mold (2). The outer mold (1) includes a cushion mold section (3) and a contact section (4). The inner diameter of the cushion mold section (3) is smaller than that of the contact section (4). The outer wall of the inner mold (2) fits with the inner wall of the contact section (4) of the outer mold (1). The height of the inner mold (2) is the same as that of the contact section (4). A split module (5) is arranged on the inner wall of the inner mold (2). The split module (5) is close to the cushion mold section (3) and the inner diameter of the split module (5) is smaller than that of the cushion mold section (3).

2. The combined double-flange forging die according to claim 1, wherein The split module (5) successively includes a first inclined section (6), a vertical section (7), and a second inclined section (8) from top to bottom. The first inclined section (6) and the second inclined section (8) are smoothly connected to both ends of the vertical section (7). The inclination angle of the first inclined section (6) is greater than that of the second inclined section (8).

3. The combined double-flange forging die according to claim 2, characterized in that, The split module (5) is arranged at the lower part of the inner wall of the inner mold (2). The inner wall of the part of the inner mold (2) above the split module (5) encloses an upper hollow mold cavity for forming the upper part of the double flange.

4. The combined double-flange forging die according to claim 1, characterized in that, The lower end face of the split module (5) fits with the upper end face of the cushion mold section (3).

5. The combined double-flange forging die according to claim 4, characterized in that, The lower side of the split module (5) and the inner wall of the cushion mold section (3) enclose a lower hollow mold cavity for forming the lower part of the double flange.

6. The combined double-flange forging die according to claim 1, wherein, The inner mold (2) is of a split structure and is evenly divided into multiple pieces according to an angle.

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