A forging die with a drainage channel

Abstract

The present invention discloses a forging die with a drainage channel, comprising a lower die, wherein the lower die is provided with a central cavity, a tip forming groove and a drainage channel, wherein: the tip forming groove is located outside the central cavity, and the tip forming groove is connected to the central cavity through the drainage channel; a web is provided between the tip forming groove and the central cavity, and the web is used to connect the tip forming groove and the central cavity; the lower die of the present invention is combined with the existing upper die so that the resistance of the central cavity of the forging die to the metal is reduced by the design of the drainage channel, thereby ensuring the qualified rate of the forming of the two tips.

Description

Technical Field

[0001] The invention relates to the technical field of forging dies, in particular to a forging die with a drainage channel. Background Art

[0002] Forging is a metal processing method. By utilizing the plasticity of metal, the workpiece is usually deformed to the required shape and size by hammering or pressurizing the blank after heating. It can also improve the mechanical properties of the metal material. Forging can eliminate defects such as as-cast looseness produced in the metal smelting process, optimize the microstructure, and at the same time, because the complete metal flow lines are preserved, the mechanical properties of the forging are generally better than those of the same material casting. However, it is difficult to form some high-necked thin-walled forgings, such as Figure 1-4 The support forgings for large excavators shown in the figure have difficulty in forming the two tips due to the resistance of the forging die cavity to the deformed metal, which results in a low product qualification rate. Summary of the Invention

[0003] In order to solve the technical problems existing in the background technology, the present invention proposes a forging die with a drainage channel.

[0004] The present invention provides a forging die with a flow channel, comprising a lower die,

[0005] The lower mold is provided with a central cavity, a tip forming groove and a drainage channel, wherein:

[0006] The tip molding groove is located outside the central cavity, and the tip molding groove is connected to the central cavity through a drainage channel;

[0007] There is a web between the tip forming groove and the center cavity, and the web is used to connect the tip forming groove and the center cavity;

[0008] The lower die of the present invention is combined with the existing upper die to reduce the resistance of the central cavity of the forging die to the metal through the design of the drainage channel, thereby ensuring the qualified rate of the two-point forming.

[0009] As a further optimized solution of the present invention, the depth of the drainage channel gradually increases from the end farthest from the central cavity to the end close to the central cavity, so as to facilitate the removal of the connecting column formed in the drainage channel at a later stage.

[0010] As a further optimized solution of the present invention, one end of the drainage channel close to the tip forming groove is on the same plane as the web, which facilitates the removal of the connecting column formed in the drainage channel at a later stage.

[0011] As a further optimized solution of the present invention, the drainage channel is conical, and the cross-sectional area of ​​the drainage channel gradually increases from the end far away from the central cavity to the end close to the central cavity. On the one hand, it is convenient to drain the material in the central cavity into the tip molding groove, thereby increasing the qualified rate. On the other hand, it is convenient to remove the connecting column formed in the drainage channel in the later stage.

[0012] As a further optimized solution of the present invention, a positioning hole is provided on the lower die to facilitate positioning of the lower die and the upper die, thereby increasing the product qualification rate.

[0013] As a further optimized solution of the present invention, it also includes a blank placement hole, which is located inside the central cavity, and the blank placement hole and the central cavity form a stepped hole. The forging method at the center position is adopted to ensure that there is no shortage of material at the bottom of the neck of the workpiece.

[0014] As a further optimized solution of the present invention, the diameter of the blank placement hole is smaller than the diameter of the central cavity, ensuring that the blank is forged into the central cavity during the processing.

[0015] As a further optimized solution of the present invention, the blank placement hole is coaxial with the central cavity to ensure the qualified rate.

[0016] In the present invention, the forging die with a drain channel is proposed. After comparing the actual use of the die before and after adding the drain channel, the qualified rate of forgings is increased from 85% to 98% under the premise of unchanged blanking weight, which is a significant effect.

[0017] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the existing large excavator support forging structure;

[0019] Figure 2 for Figure 1 AA section view;

[0020] Figure 3 for Figure 1 CC cross-sectional view;

[0021] Figure 4 for Figure 1 DD cross-sectional view;

[0022] Figure 5 It is a schematic diagram of the structure of the present invention;

[0023] Figure 6 This is the main view of the present invention;

[0024] Figure 7 This is a cross-sectional view of the BB drainage channel of the present invention. DETAILED DESCRIPTION

[0025] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar symbols throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention, and are not to be construed as limiting the present invention.

[0026] It should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as limiting the present invention.

[0027] Furthermore, 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 the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0028] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0029] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0030] like Figure 5-7 The forging die with a flow channel shown in FIG. comprises a lower die 1,

[0031] The lower mold 1 is provided with a central cavity 10, a tip forming groove 11 and a drainage channel 12, wherein:

[0032] The central cavity 10 is used to form the central structure of the component. The tip molding groove 11 is located outside the central cavity 10 and is connected to the central cavity 10 through the drainage channel 12.

[0033] There is a web 13 between the tip molding groove 11 and the central cavity 10, and the web 13 is used to connect the tip molding groove 11 and the central cavity 10;

[0034] The blank placement hole 15 is located inside the central cavity 10, and the blank placement hole 15 and the central cavity 10 form a stepped hole. The forging method at the central position is adopted to ensure that there is no shortage of material at the bottom of the workpiece neck. In order to ensure the qualified rate of the parts, in the present invention, the axis of the blank placement hole 15 is coaxial with the central cavity 10;

[0035] The diameter of the blank placement hole 15 is smaller than the diameter of the central cavity 10, ensuring that the blank is forged into the central cavity 10 during the processing;

[0036] Specifically, the lower die 1 is further provided with a through hole coaxial with the blank placement hole 15, the aperture of which is smaller than that of the blank placement hole 15. During the processing, the resistance rod passes through the through hole to move the blank toward the upper die and send out extrusion deformation.

[0037] Specifically, in this embodiment, the depth of the drainage channel 12 gradually increases from the end away from the central cavity 10 to the end close to the central cavity 10, so as to facilitate the removal of the connecting column formed in the drainage channel 12 at a later stage;

[0038] In this embodiment, the drainage channel 12 is preferably located at one end close to the tip molding groove 11 and is on the same plane as the web 13, so as to facilitate the removal of the connecting column formed in the drainage channel 12 at a later stage, and the depth of the drainage to the starting position close to the end of the central cavity 10 is 3 mm.

[0039] In this embodiment, it is preferred that the drainage channel 12 is conical, and the cross-sectional area of ​​the drainage channel 12 gradually increases from the end far away from the central cavity 10 to the end close to the central cavity 10. On the one hand, it is convenient to drain the material in the central cavity 10 into the tip molding groove 11 to increase the qualified rate. On the other hand, it is convenient to remove the connecting column formed in the drainage channel 12 in the later stage.

[0040] In this embodiment, preferably, a positioning hole 14 is provided on the lower mold 1 to facilitate positioning of the lower mold 1 and the upper mold, thereby increasing the product qualification rate.

[0041] During the working process of this embodiment: Figure 1-4 The product shown is a high-neck thin-wall forging, which is difficult to form. In order to ensure that there is no shortage of material at the bottom of the neck, a forging method is adopted in which the cylindrical blank is placed in the center. The two tips are the last positions that the blank reaches and are the most difficult to form. The deformed metal of the original mold is difficult to reach the tip forming groove 11. There is a web 13 connecting the central cavity 10 and the tip forming groove 11. The thickness of the web 13 is required by the customer's drawing to be 15mm plus or minus 0, so when designing the mold, the size is 15mm, the starting position of the drainage channel 12 is 3mm deep, and the ending position of the drainage channel 12 is flush with the surface of the web 13, which fully meets the requirements of the customer's drawing. In this embodiment, the resistance to the metal is reduced and the qualified rate is increased by setting the drainage channel 12. By comparing the actual use of the mold before and after adding the drainage channel 12, the qualified rate of the forging is increased from 85% to 98% under the premise of unchanged blanking weight, and the effect is obvious.

[0042] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A forging die with a drain channel, characterized in that: Including the lower die (1), The lower mold (1) is provided with a central cavity (10), a tip molding groove (11) and a drainage channel (12), wherein: The tip molding groove (11) is located outside the central cavity (10), and the tip molding groove (11) is connected to the central cavity (10) through the drainage channel (12); A web (13) is provided between the tip molding groove (11) and the central cavity (10), and the web (13) is used to connect the tip molding groove (11) and the central cavity (10); The depth of the drainage channel (12) gradually increases from the end away from the central cavity (10) to the end close to the central cavity (10); The drainage channel (12) is tapered, and the cross-sectional area of ​​the drainage channel (12) gradually increases from an end away from the central cavity (10) to an end close to the central cavity (10).

2. The forging die with a drain channel according to claim 1, characterized in that: The drainage channel (12) is located at one end close to the tip forming groove (11) and is on the same plane as the web (13).

3. The forging die with a drain channel according to claim 1, characterized in that: A positioning hole (14) is provided on the lower die (1).

4. The forging die with a drain channel according to claim 1, characterized in that: It also includes a blank placement hole (15), which is located inside the central cavity (10), and the blank placement hole (15) and the central cavity (10) form a stepped hole.

5. The forging die with a drain channel according to claim 4, characterized in that: The diameter of the blank placement hole (15) is smaller than the diameter of the central cavity (10).

6. The forging die with a drain channel according to claim 4, characterized in that: The blank placement hole (15) is coaxial with the central cavity (10).

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