Forging die for long-strip arc-shaped titanium alloy forge piece with H-shaped section
By setting deep cavities and arc cavities in the H-shaped cross-section long arc-shaped titanium alloy forging die, and adding raised bridges at the edge of the cavity, the problem of poor metal flow at the high ribs and arc edges of the forging is solved, and better metal filling and forging effect is achieved.
Patent Information
- Application Number
- CN202423276401.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-30
- Publication Date
- 2025-12-09
- Estimated Expiration
- 2034-12-30
AI Technical Summary
H-shaped cross-section long arc-shaped titanium alloy forgings are difficult to fill the cavity during the forging process, resulting in uneven forming and inconsistent dimensions. In particular, the metal flow is poor at the high ribs and arc edges, making it difficult to accurately control the shape.
An H-shaped cross-section elongated arc-shaped titanium alloy forging die was designed, comprising an upper die and a lower die. The die cavity is provided with a deep cavity and an arc-shaped cavity, and first and second raised bridges are provided at the edge of the cavity to close off local difficult-to-form areas and improve the metal filling effect.
By raising the bridge section, the filling of metal in the high ribs and curved edges is improved, the forging effect is enhanced, and the forging can be successfully formed under the condition of limited equipment tonnage, thus reducing the equipment tonnage requirements.
Smart Images
Figure CN223642709U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of titanium alloy forging die structure design, and in particular to a forging die for H-shaped cross-section elongated arc-shaped titanium alloy forging. Background Technology
[0002] Long, rectangular (length greater than 2500mm) arc-shaped (with arc-shaped edges) deep-cavity forgings with H-shaped cross-sections (partial or all areas are H-shaped) are difficult to forge. They have high ribs on both sides, making forming challenging. One side contains excessively high ribs, and the arc-shaped structure makes it difficult for metal to flow evenly throughout the cavity. Due to the high deformation resistance, poor thermal conductivity, and high viscosity of titanium alloy forgings, their poor metal flowability makes it difficult to precisely control the shape during forming, easily leading to defects such as incomplete filling of the cavity and folding. The forging temperature range is also narrow. Therefore, strict requirements are placed on the shape and dimensions of the blank during forging.
[0003] The forming of this forging requires extremely high precision in terms of the curvature and dimensions of the rough shape. Free forging is employed during the roughing process. While free forging offers advantages such as simple tools, high versatility, and flexibility, it places extremely high demands on the operator. The shape and dimensional accuracy are difficult to control, resulting in inconsistencies in the dimensions or shapes of the free-forged rough shape during batch production. This low uniformity leads to variations in incomplete filling within the limited forging tonnage of the die forging equipment.
[0004] Therefore, in the existing technology, during the forging process of titanium alloy forgings with H-shaped cross-sections and arc-shaped edges, there is a problem of not being able to fill the mold cavity, which affects the forging and forming of the entire forging. Utility Model Content
[0005] In view of this, the main purpose of this utility model is to provide a forging mold for H-shaped cross-section long arc-shaped titanium alloy forgings that is compatible with both H-shaped and arc-shaped structures for forging, ensuring better metal filling at the high ribs and arc-shaped edge structures, and improving the forging effect.
[0006] To achieve the above objectives, the technical solution of this utility model is implemented as follows:
[0007] The forging die for the H-shaped cross-section elongated arc-shaped titanium alloy forging includes: an upper die and a lower die, with cavities formed inside the upper die and the lower die;
[0008] In a preferred embodiment, the cavity includes: a cavity body, a deep cavity, and an arc-shaped cavity; the deep cavity and the arc-shaped cavity are recessed at the edge of the cavity body, a first raised bridge portion is protruding at the end of the deep cavity, and a second raised bridge portion is protruding on the outer side of the arc-shaped cavity.
[0009] In a preferred embodiment, a bridge body is provided protruding from the edge of the cavity body, and the first heightened bridge and the second heightened bridge are respectively protruding from the upper side of the bridge body.
[0010] In a preferred embodiment, the height of the first and second raised bridge portions is 15-25 mm.
[0011] In a preferred embodiment, the height of the first and second raised bridge portions is 20 mm.
[0012] In a preferred embodiment, the two ends of the first heightened bridge portion are bent toward both sides of the deep cavity.
[0013] In a preferred embodiment, the two ends of the first heightened bridge portion bend and extend to the arc-shaped cavity.
[0014] In a preferred embodiment, the second heightened bridge portion extends from the arc-shaped cavity to the transverse bridge portion body.
[0015] In a preferred embodiment, the draft angle of the deep cavity is increased by 6°-10° relative to the draft angle of the cavity body.
[0016] In a preferred embodiment, the corner angle at the edge of the deep cavity is 15-30° greater than the corner angle at the edge of the cavity body.
[0017] In a preferred embodiment, the depth of the deep cavity extends 120 mm into the bottom of the cavity body.
[0018] The H-shaped cross-section elongated arc-shaped titanium alloy forging die of this utility model has the following beneficial effects:
[0019] The forging die for H-shaped cross-section elongated arc-shaped titanium alloy forging includes: an upper die and a lower die, with cavities formed inside the upper die and the lower die; the cavity includes: a cavity body, a deep cavity and an arc-shaped cavity; the deep cavity and the arc-shaped cavity are recessed at the edge of the cavity body, a first raised bridge is protruding at the end of the deep cavity, and a second raised bridge is protruding on the outside of the arc-shaped cavity.
[0020] This invention solves the problem in the existing technology that, during the forging process of titanium alloy forgings with H-shaped cross-sections and arc-shaped edges, the cavity cannot be filled completely, which affects the forging and forming of the entire forging.
[0021] This forging die for H-shaped cross-section elongated arc-shaped titanium alloy forgings, through its deep cavity and arc-shaped cavity structural design, meets the requirements for adapting forging of H-shaped cross-section elongated arc-shaped titanium alloy forgings with H-shaped and arc-shaped structures, ensuring better metal filling at high ribs and arc-shaped edge structures, and improving forging effect. Attached Figure Description
[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0023] Figure 1 This is a schematic diagram of the upper die structure of a forging die for an H-shaped cross-section elongated arc-shaped titanium alloy forging according to one embodiment of the present disclosure;
[0024] Figure 2 This is a schematic diagram of the lower die structure of a forging die for an H-shaped cross-section elongated arc-shaped titanium alloy forging according to one embodiment of the present disclosure;
[0025] Figure 3 This is a cross-sectional view of the upper die of an H-shaped cross-section elongated arc-shaped titanium alloy forging die in the deep cavity according to an embodiment of the present disclosure.
[0026] [Explanation of Key Component Symbols]
[0027] 1. Upper mold; 2. Lower mold;
[0028] 3. Cavity;
[0029] 31. Cavity body; 32. Deep cavity; 33. Arc-shaped cavity;
[0030] 41. First heightened bridge section; 42. Second heightened bridge section;
[0031] 5. Bridge body. Detailed Implementation
[0032] The forging die for H-shaped cross-section elongated arc-shaped titanium alloy forgings of this utility model will be further described in detail below with reference to the accompanying drawings and embodiments.
[0033] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.
[0034] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.
[0035] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented, for example, in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.
[0036] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.
[0037] like Figures 1-3 As shown, the H-shaped cross-section elongated arc-shaped titanium alloy forging die includes: an upper die 1 and a lower die 2, with a cavity 3 inside the upper die 1 and the lower die 2; it meets the forging requirements for H-shaped forgings.
[0038] To accommodate the filling of the forging, especially the H-shaped high ribs (high ribs: web ≈ 5, total height of both high ribs greater than or equal to 250mm; web refers to the thin, flat plate-like area between two or more high ribs in the forging; in this application, the web thickness of the forging is approximately 45mm), and the arc-shaped structure of the edges, the cavity 3 includes: a cavity body 31, a deep cavity 32 corresponding to the high rib structure of the forging, and an arc-shaped cavity 33 corresponding to the arc-shaped structure of the forging. The deep cavity 32 and the arc-shaped cavity 33 are recessed at the edge of the cavity body 31. To better fill the deep cavity 32 and the arc-shaped cavity 33 of the forging, a first raised bridge portion 41 is protruding at the end of the deep cavity 32, and a second raised bridge portion 42 is protruding on the outer side of the arc-shaped cavity 33.
[0039] Here, a deep cavity refers to a cavity with a depth of 100 mm or more.
[0040] To address the difficulty in forming H-shaped curved titanium alloy forgings, while ensuring consistency in the initial rough shape, the bridge sections in the difficult-to-form areas (deep cavity 32 and arc-shaped cavity 33) are heightened, and these bridge sections are closed off. This allows the billet to be formed within a closed die cavity, constraining the metal flow direction and eliminating the resistance from large amounts of flash, making it easier for the metal to fill the cavity. Simultaneously, from the moment the billet contacts the die wall, the lateral principal compressive stress gradually increases, significantly improving the forging's plasticity and making the metal easier to deform. This reduces the tonnage requirements of the equipment, even with limited capacity, and facilitates forging formation.
[0041] To facilitate metal filling of the cavity body 31, a bridge body 5 protrudes from the edge of the cavity body 31, with a first raised bridge portion 41 and a second raised bridge portion 42 protruding from the upper side of the bridge body 5, respectively. This ensures that the heights of the first raised bridge portion 41 and the second raised bridge portion 42 meet the requirements.
[0042] Preferably, the height of the first raised bridge portion 41 and the second raised bridge portion 42 is 15-25 mm. More preferably, the height of the first raised bridge portion 41 and the second raised bridge portion 42 is 20 mm.
[0043] To ensure that the metal fills the entire deep cavity 32, especially where the two deep cavities 32 are close together, the two ends of the first raised bridge portion 41 are bent towards both sides of the deep cavity 32. This ensures that the metal wraps around the two ends of the H-shape and improves the filling effect of the metal.
[0044] To completely enclose the ends of the deep cavity 32 and ensure complete metal filling to achieve the desired forging effect, the first raised bridge portion 41 extends to the arc-shaped cavity 33 at both ends.
[0045] To completely enclose the arc-shaped cavity 33 and ensure complete metal filling, thus achieving the desired forging effect, the second heightened bridge section 42 extends from the arc-shaped cavity 33 to the transverse bridge body 5.
[0046] In response to the typical wear and tear of closed forging dies, this die design only uses closed bridges (first raised bridge section 41 and second raised bridge section 42) in small, difficult-to-form areas (deep cavity 32 and arc cavity 33), accounting for about 15% of the overall bridge area of the die. The proportion is small and evenly distributed, and the resulting local unit pressure can be alleviated to a certain extent. Therefore, the damage to the die is negligible.
[0047] Preferably, the forgings can be bent using a bending fixture before forging, which greatly improves the consistency of the blank and avoids the disadvantages of closed-die forging, such as incomplete filling of the forging due to inaccurate blank volume.
[0048] To facilitate demolding and ensure smooth demolding of the forging, especially for the deep cavity 32, the draft angle of the deep cavity 32 is increased by 6°-10° relative to the draft angle of the cavity body 31 (e.g., Figure 3 As shown in Figure 'a', the angle increases from 96° to 100°.
[0049] Furthermore, to facilitate demolding and reduce the resistance to metal flow caused by the deep cavity, allowing the metal to better fill the cavity, the corner angle at the edge of the deep cavity 32 is 15-30° greater than the corner angle at the edge of the cavity body 31 (e.g., Figure 3 R1 shown is the edge turning angle of 15-30°.
[0050] The depth of the deep cavity 32 extends 120mm into the bottom of the cavity body 31.
[0051] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the scope of protection of the present utility model.
Claims
1. A forging die for H-shaped cross-section elongated arc-shaped titanium alloy forgings, characterized in that, include: The upper mold (1) and the lower mold (2) have cavities (3) inside them; The cavity (3) includes: a cavity body (31), a deep cavity (32) and an arc-shaped cavity (33); the deep cavity (32) and the arc-shaped cavity (33) are recessed at the edge of the cavity body (31), a first raised bridge portion (41) is protruding at the end of the deep cavity (32), and a second raised bridge portion (42) is protruding on the outside of the arc-shaped cavity (33).
2. The forging die for H-shaped cross-section elongated arc-shaped titanium alloy forgings according to claim 1, characterized in that, A bridge body (5) is provided on the edge of the cavity body (31), and the first heightened bridge (41) and the second heightened bridge (42) are respectively provided on the upper side of the bridge body (5).
3. The forging die for H-shaped cross-section elongated arc-shaped titanium alloy forgings according to claim 2, characterized in that, The height of the first raised bridge section (41) and the second raised bridge section (42) is 15-25mm.
4. The forging die for H-shaped cross-section elongated arc-shaped titanium alloy forgings according to claim 3, characterized in that, The height of the first heightened bridge section (41) and the second heightened bridge section (42) is 20 mm.
5. The forging die for H-shaped cross-section elongated arc-shaped titanium alloy forgings according to any one of claims 2-4, characterized in that, The two ends of the first heightened bridge section (41) bend toward both sides of the deep cavity (32).
6. The forging die for H-shaped cross-section elongated arc-shaped titanium alloy forgings according to claim 5, characterized in that, The first raised bridge section (41) bends at both ends and extends to the arc-shaped cavity (33).
7. The forging die for H-shaped cross-section elongated arc-shaped titanium alloy forgings according to any one of claims 2-4, characterized in that, The second heightened bridge section (42) extends from the arc-shaped cavity (33) to the transverse bridge body (5).
8. The forging die for H-shaped cross-section elongated arc-shaped titanium alloy forgings according to any one of claims 1-4, characterized in that, The draft angle of the deep cavity (32) is 6°-10° greater than that of the cavity body (31).
9. The forging die for H-shaped cross-section elongated arc-shaped titanium alloy forgings according to any one of claims 1-4, characterized in that, The corner angle at the edge of the deep cavity (32) is 15-30° greater than the corner angle at the edge of the cavity body (31).
10. The forging die for H-shaped cross-section elongated arc-shaped titanium alloy forgings according to any one of claims 1-4, characterized in that, The deep cavity (32) extends 120 mm into the bottom of the cavity body (31).