Metal material counter extrusion forming cold forging die

Abstract

The utility model relates to cold forging die technical field, concretely relates to a kind of metal material reverse extrusion forming cold forging die, comprising: first die body and second die body, first movable plate and second movable plate are equipped on second die body along Z-axis direction can be moved, first movable plate movable sleeve is set in the outer periphery of second movable plate, and at least part of the outside wall of second movable plate is attached with at least part of the inside wall of first movable plate;Forming cavity is formed between first movable plate inside wall and second movable plate, first die body has forming main plate that seals movable forming cavity, and the area of forming main plate is greater than the area of second movable plate upper surface.The first movable plate can be synchronous with forming main plate in the utility model and be pressed down, at this time, first movable plate and the product raw material in movable forming cavity are relatively stationary, reduce the frictional resistance between product raw material and mould in flow forming process, help product height dimension forming, while correspondingly reduced forming forging pressure.

Description

Technical Field

[0001] This utility model relates to the field of cold forging die technology, and more specifically, to a cold forging die for reverse extrusion forming of metal materials. Background Technology

[0002] Traditional complex metal forming dies typically employ forward cold extrusion forging or hot forging processes, such as forming dies for aluminum alloy products. Specifically, cold extrusion forging involves placing raw materials at room temperature directly into the lower die, followed by downward pressure from the upper die punch to forge the product. Hot forging, on the other hand, involves heating the raw materials to a specific temperature before transferring them to a preheated lower die for extrusion forming, and finally ejecting the product through the lower die ejection mechanism.

[0003] However, the above process has many drawbacks. Because the lower mold is completely stationary, the material around the product generates reverse friction with the side wall mold as it flows upward, making it difficult to form the product's height and requiring a machine with a larger tonnage. At the same time, the increased compressive stress at the bottom of the product's corners causes a significant density difference between the corners and the flat surface, leading to problems such as color variations and frame-like imprints, which seriously affect the appearance of the product after anodizing. Utility Model Content

[0004] In view of this, the present invention provides a cold forging die for reverse extrusion forming of metal materials, which aims to solve the above-mentioned technical problems.

[0005] This utility model discloses a cold forging die for reverse extrusion forming of metal materials, comprising a first die body and a second die body. The second die body is provided with a first movable plate and a second movable plate that are movable along the Z-axis direction. The first movable plate is movably sleeved on the outer periphery of the second movable plate, and at least a portion of the outer sidewall of the second movable plate is in contact with at least a portion of the inner sidewall of the first movable plate. A movable forming cavity is formed between the inner sidewall of the first movable plate and the second movable plate. The first die body has a forming main plate that closes the movable forming cavity, and the area of ​​the forming main plate is larger than the area of ​​the upper surface of the second movable plate.

[0006] Preferably, the movable forming cavity includes an overflow groove disposed on the second movable plate and the first movable plate, and at least a portion of the inner sidewall of the first movable plate.

[0007] Preferably, at least one set of guide structures is provided between the first movable plate and the second movable plate.

[0008] Preferably, the guide structure includes a guide protrusion and a guide recess arranged along the Z-axis direction, one of the guide protrusion and the guide recess being disposed on the first movable plate, and the other being disposed on the second movable plate.

[0009] Preferably, the second movable plate is disposed on the second mold body by means of an elastic structure.

[0010] Preferably, at least one set of limiting structures is provided between the forming motherboard and the first mold body.

[0011] Preferably, the limiting structure includes a wedge block and a beveled concave surface that cooperate with each other, one of which is disposed on the forming main plate and the other is disposed on the first mold body.

[0012] Preferably, the forming main plate and the second movable plate are coaxially arranged.

[0013] Preferably, the outer periphery of the molded motherboard is provided with a fixing clamp.

[0014] Preferably, a second pad is provided on the outer periphery of the second movable plate, and a circumferential fixing structure is provided between the second pad and the second mold body.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows: First, a movable forming cavity is formed by setting a first movable plate and a second movable plate on the second mold body. The first movable plate on the second mold body moves relative to the second movable plate along the Z-axis, so that when the forming main plate on the first mold body presses down and contacts the first movable plate, the first movable plate can press down synchronously with the forming main plate. At this time, the first movable plate and the product raw material in the movable forming cavity are relatively stationary, reducing the frictional resistance between the product raw material and the mold during the flow forming process, which helps to form the product height dimension, and at the same time reduces the forming forging pressure accordingly.

[0016] Second, the main structure of the first mold body that participates in forming and transmitting pressure is the forming main plate. A closed space is formed between the forming main plate and the movable forming cavity, which avoids the spillage of product raw materials and affects product yield.

[0017] Third, the movable forming cavity can be adjusted according to the structural characteristics of different products. By adjusting the movable forming cavity, the filling state of the raw materials into the side wall of the movable forming cavity can be controlled, which is flexible, convenient, and has a wide range of applications. Attached Figure Description

[0018] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings: Figure 1 A three-dimensional structural schematic diagram of a cold forging die for reverse extrusion forming of metal materials provided for an embodiment of this utility model; Figure 2 A side view of a cold forging die for reverse extrusion forming of metal material provided in an embodiment of this utility model; Figure 3 Provided for the embodiments of this utility model Figure 2 A cross-sectional view along the AA direction; Figure 4 Provided for the embodiments of this utility model Figure 3 Enlarged view of point B in the middle; Figure 5 A three-dimensional structural diagram of the first movable plate and the second movable plate provided for embodiments of this utility model; Figure 6 A three-dimensional structural diagram of the fixing clamp and the forming main board provided in the embodiment of this utility model; Figure 7 A three-dimensional structural diagram of the second pad provided in an embodiment of this utility model.

[0019] In the diagram: 1. First mold body; 11. First mold base; 12. First pad; 13. Fixing clamp; 14. Forming main plate; 2. Second mold body; 21. Second mold base; 22. Second pad; 23. First movable plate; 231. Lower template; 232. Lower ejector plate; 24. Second movable plate; 25. Movable forming cavity; 251. Overflow groove; 26. Guide structure; 261. Guide protrusion; 262. Guide recess; 27. Elastic structure; 28. Limiting structure; 281. Wedge block; 282. Beveled concave surface; 29. ​​Circumferential fixing structure; 291. Limiting component; 292. Limiting groove. Detailed Implementation

[0020] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0021] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0022] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0023] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0024] Example 1 Combination Figures 1 to 4 As shown, this embodiment provides a cold forging die for reverse extrusion forming of metal materials, including a first die body 1 and a second die body 2. The second die body 2 is provided with a first movable plate 23 and a second movable plate 24 that are movable along the Z-axis direction. The first movable plate 23 is movably sleeved on the outer periphery of the second movable plate 24, and at least a portion of the outer sidewall of the second movable plate 24 is in contact with at least a portion of the inner sidewall of the first movable plate 23. A movable forming cavity 25 is formed between the inner sidewall of the first movable plate 23 and the second movable plate 24. The first die body 1 has a forming main plate 14 that closes the movable forming cavity 25. The forming main plate 14 is coaxially arranged with the second movable plate 24, and the area of ​​the forming main plate 14 is larger than the area of ​​the upper surface of the second movable plate 24.

[0025] The Z-axis, X-axis, and Y-axis are perpendicular to each other.

[0026] Preferably, a fixing clamp 13 is provided on the outer periphery of the molded main board.

[0027] Preferably, a second pad 22 is provided on the outer periphery of the second movable plate 24.

[0028] Specifically, the first mold body 1 includes a first mold base 11, a first pad 12, a fixing clamp 13, and a forming main plate 14 arranged sequentially. At least a portion of the forming main plate 14 passes through the fixing clamp 13 and is disposed on the first pad 12. The first mold base 11 is used to support pressure and connect equipment, the first pad 12 is used to support the forming main plate 14 and transmit pressure, and the fixing clamp 13 is used to fix the forming main plate 14 and prevent the forming main plate 14 from deforming and cracking.

[0029] Specifically, the second mold body 2 includes a second mold base 21 and a second pad 22 arranged sequentially, and a first movable plate 23 and a second movable plate 24 movably disposed on the second pad 22 along the Z-axis direction. The second mold base 21 is used to support and connect the equipment, the second pad 22 is used to fix the first movable plate 23 and the second movable plate 24, and the first movable plate 23 and the second movable plate 24 are used for forming and unloading.

[0030] Specifically, the material of the first mold base 11 is, for example, 45# HRC28~32; the material of the first pad 12 is, for example, H13 HRC50~53; the material of the fixing clamp 13 is, for example, spring steel HRC38~42; and the material of the forming main plate 14 is, for example, DC53 HRC50~54. The material of the second mold base 21 is, for example, 45# HRC28~32; the material of the second pad 22 is, for example, H13 HRC50~53; and the first movable plate 23 includes a lower template 231 and a lower ejector plate 232, the material of the lower template 231 being, for example, H13 HRC50~54, and the material of the lower ejector plate 232 being, for example, H13 HRC50~53.

[0031] Understandably, the forming main plate 14 seals the movable forming cavity 25 between the first movable plate 23 and the second movable plate 24 to prevent raw materials from overflowing during the forming process and affecting product yield. Simultaneously, during product forming, the forming main plate 14 first contacts the first movable plate 23, then pulls the first movable plate 23 downwards, keeping the shape of the raw material relative to the first movable plate 23 in a relatively stationary state. This reduces frictional resistance between the product and the mold during the forming process, facilitating the forming of product height dimensions while lowering the forming pressure.

[0032] Furthermore, during the product unloading process, the second movable plate 24 and the first movable plate 23 can move towards each other along the Z-axis, which helps the product to smoothly exit the movable forming cavity 25. Specifically, the movement time and sequence of the second movable plate 24 and the first movable plate 23 can be adjusted according to the actual situation, and this embodiment does not impose specific limitations on this.

[0033] Combination Figure 2 and Figure 7 As shown, specifically, a circumferential fixing structure 29 is provided between the second pad 22 and the second mold body 2. The circumferential fixing structure 29 includes a limiting member 291 and a limiting groove 292 that cooperate with each other. One of the limiting member 291 and the limiting groove 292 is provided on the second pad 22, and the other is provided on the second mold base 21.

[0034] Understandably, the circumferential fixing structure 29 achieves circumferential fixing between the second pad 22 and the second mold body 2 through the mutual cooperation of the limiting member 291 and the limiting groove 292. This effectively prevents the relative movement of the second pad 22 and the second mold body 2 in the circumferential direction, enhances the overall stability and precision of the mold, and ensures the reliability and firmness of the connection.

[0035] Combination Figure 5 As shown, preferably, the movable forming cavity 25 includes an overflow groove 251 disposed on the second movable plate 24 and the first movable plate 23 and at least a portion of the inner sidewall of the first movable plate 23.

[0036] It is understandable that the overflow trough 251 can be adjusted according to different product structural features and dimensions, thereby controlling the product raw materials to fill the inner wall of the first movable plate 23 to a full state, which is flexible, convenient and has a wide range of applications.

[0037] Preferably, at least one set of guide structures 26 is provided between the first movable plate 23 and the second movable plate 24. The guide structure 26 includes a guide protrusion 261 and a guide recess 262 arranged along the Z-axis direction, one of the guide protrusion 261 and the guide recess 262 is provided on the first movable plate 23, and the other is provided on the second movable plate 24.

[0038] It is understandable that the guide protrusion 261 and guide recess 262 are located on the two movable plates respectively. By matching their shapes, the movement of the movable plates is constrained, so that they can only move relative to each other along the Z-axis, thereby ensuring the stability and accuracy of the first mold 1 and the second mold 2 during operation.

[0039] Combination Figure 3 As shown, preferably, the first movable plate 23 is disposed on the second mold body 2 by a spring structure 27. The spring structure 27 is, for example, a spring. The second movable plate 24 is disposed on the second mold body 2, for example, by a linear actuator.

[0040] Understandably, the elastic structure 27 provides cushioning and repositioning. Its elastic deformation and recovery capabilities enable it to move the sidewalls of the forming cavity 25 during product forming, thereby reducing frictional resistance between the product shape and the mold, and automating the production process to reduce manual intervention. A linear actuator is used to precisely control the position and speed of the object. For example, the second movable plate 24 is mounted on the second mold body 2 via a linear actuator, allowing for precise movement of the second movable plate 24 controlled by the linear actuator, thus coordinating with other components to complete mold actions.

[0041] Combination Figure 6 As shown, preferably, at least one set of limiting structures 28 is provided between the molding main plate 14 and the first mold body 1. The limiting structure 28 includes a wedge block 281 and a beveled concave surface 282 that cooperate with each other. One of the wedge block 281 and the beveled concave surface 282 is disposed on the molding main plate 14, and the other is disposed on the first mold body 1. To achieve the positioning or locking function, the wedge block 281 cooperates with the beveled concave surface 282. When the wedge block 281 is inserted into the beveled concave surface 282, it can limit the molding main plate 14 and the first mold body 1, preventing them from moving in an unexpected direction.

[0042] It is understandable that the wedge block 281 and the oblique concave surface 282 are located on the two movable plates respectively. The forming main plate 14 is fixed on the first mold body 1 by the shape matching. When one side of the wedge block 281 contacts the oblique concave surface 282, the vertical force can be converted into the horizontal limiting force due to the effect of the oblique surface, thereby realizing the stable limiting of the two parts. The structure is simple, the limiting is reliable, and it is easy to process and adjust.

[0043] Specifically, the forming principle of the metal material reverse extrusion cold forging die in this embodiment is as follows: As the equipment descends, the forming main plate 14 of the first mold 1 first contacts the first movable plate 23. As the equipment descends further, the forming main plate 14 contacts the product raw material in the movable forming cavity 25. At the same time, under the elastic force of the first movable plate 23, the forming main plate and the first movable plate 23 fit tightly together and form a closed space with the movable forming cavity 25, ensuring that the product raw material will not overflow from the gaps during the forming process.

[0044] As the equipment descends further, the forming main plate 14 and the first movable plate 23 descend synchronously. The forming main plate 14 first contacts the upper surface of the raw material in the movable forming cavity 25, at which point the lower surface of the raw material also contacts the second movable plate 24. As the equipment descends and the pressure increases, the raw material begins to flow into the pre-designed overflow groove 251 of the second movable plate 24, ultimately obtaining a forged billet that meets the requirements. During this process, because the first movable plate 23 also moves downward, meaning the product shape is relatively stationary relative to the first movable plate 23, the frictional resistance of the raw material during the flow process is reduced, which helps to form the product height dimension, and at the same time, the forming pressure is correspondingly reduced.

[0045] It will be understood by those skilled in the art that the above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A cold forging die for reverse extrusion forming of metal materials, comprising a first die body (1) and a second die body (2), characterized in that, The second mold body (2) is provided with a first movable plate (23) and a second movable plate (24) that are movable along the Z-axis. The first movable plate (23) is movably sleeved on the outer periphery of the second movable plate (24), and at least a portion of the outer sidewall of the second movable plate (24) is in contact with at least a portion of the inner sidewall of the first movable plate (23). An active forming cavity (25) is formed between the inner sidewall of the first movable plate (23) and the second movable plate (24). The first mold body (1) has a forming main plate (14) that closes the active forming cavity (25), and the area of ​​the forming main plate (14) is larger than the area of ​​the upper surface of the second movable plate (24).

2. The cold forging die for reverse extrusion forming of metal materials according to claim 1, characterized in that, The movable forming cavity (25) includes an overflow groove (251) disposed on the second movable plate (24) and the first movable plate (23) and at least a portion of the inner sidewall of the first movable plate (23).

3. The cold forging die for reverse extrusion forming of metal materials according to claim 1, characterized in that, At least one set of guide structures (26) is provided between the first movable plate (23) and the second movable plate (24).

4. The cold forging die for reverse extrusion forming of metal materials according to claim 3, characterized in that, The guide structure (26) includes a guide protrusion (261) and a guide recess (262) arranged along the Z-axis direction. One of the guide protrusion (261) and the guide recess (262) is arranged on the first movable plate (23), and the other is arranged on the second movable plate (24).

5. A cold forging die for reverse extrusion forming of metal materials according to claim 1, characterized in that, The second movable plate (24) is set on the second mold (2) through an elastic structure (27).

6. The cold forging die for reverse extrusion forming of metal materials according to claim 1, characterized in that, At least one set of limiting structures (28) is provided between the forming main board (14) and the first mold (1).

7. A cold forging die for reverse extrusion forming of metal materials according to claim 6, characterized in that, The limiting structure (28) includes a wedge block (281) and a beveled concave surface (282) that cooperate with each other. One of the wedge block (281) and the beveled concave surface (282) is disposed on the forming main plate (14), and the other is disposed on the first mold body (1).

8. A cold forging die for reverse extrusion forming of metal materials according to claim 1, characterized in that, The forming main plate (14) is coaxially arranged with the second movable plate (24).

9. A cold forging die for reverse extrusion forming of metal materials according to claim 1, characterized in that, A fixing clamp (13) is provided on the outer periphery of the formed main board.

10. A cold forging die for reverse extrusion forming of metal materials according to claim 1, characterized in that, The second movable plate (24) is provided with a second pad (22) on its outer periphery, and a circumferential fixing structure (29) is provided between the second pad (22) and the second mold (2).

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