Cross member profile extrusion die for automotive vehicles

Abstract

The utility model discloses a kind of crossbeam section bar extrusion dies for automobile, it is related to section bar extrusion die technical field, including upper die, lower die is connected to upper die;Four corners of the side of upper die are respectively provided with first shunt hole, four second shunt holes are provided between the first shunt hole gap, die core rod is connected in the four second shunt holes, lower die is provided with discharge sink bridge away from the side of upper die, several back holes are provided in the discharge sink bridge gap, the junction of lower die and upper die is provided with welding chamber, the side of welding chamber close to lower die is provided with the resistance flow table for collecting small runner, resistance flow table and die core rod between are provided with drainage channel, the through diameter of first shunt hole is twice of its outlet.The utility model is by the side of welding chamber close to lower die setting resistance flow table, and runner caliber is collected small, to realize synchronous supercharging, effectively optimize the flowing path of metal material in extrusion process, improve flow rate and pressure.

Description

Technical Field

[0001] This utility model relates to the field of profile extrusion die technology, and more specifically to an extrusion die for automotive crossbeam profiles. Background Technology

[0002] Crossbeam profiles are used in automotive body structures to provide strength and support, and are commonly found in doors, roofs, and chassis. They require high strength and lightweight design. Automotive crossbeam profile extrusion dies are precision tools used to produce automotive crossbeam profiles, and their design and manufacturing involve several key aspects. The extrusion die is formed by placing a heated metal ingot into the die and applying pressure using an extruder to extrude it from the die's orifice to form the desired crossbeam shape.

[0003] Existing extrusion dies have some problems in practical applications. For example, uneven material flow during extrusion leads to inconsistent wall thickness of the crossbeam profile, affecting its mechanical properties and durability. Dies are also prone to wear under high pressure, resulting in reduced production efficiency and product consistency. In addition, existing die designs often fail to effectively control the material flow path and pressure distribution, leading to poor material filling at small extrusion ratios and affecting product quality. Utility Model Content

[0004] The purpose of this utility model is to provide an extrusion die for automotive crossbeam profiles in order to solve the above-mentioned technical problems.

[0005] To achieve the above objectives, this utility model specifically adopts the following technical solution: This utility model proposes an extrusion die for automotive crossbeam profiles, including an upper die and a lower die connected to the upper die; The upper mold has four first diversion holes at its four corners, and four second diversion holes are provided between the gaps of the first diversion holes. A mold core rod is connected in the middle of the four second diversion holes. The lower mold has a discharge bridge on the side away from the upper mold. Several back holes are provided between the discharge bridge and the lower mold. A welding chamber is provided at the connection between the lower mold and the upper mold. A flow-blocking platform for narrowing the flow channel is provided on the side of the welding chamber near the lower mold. A flow-guiding channel is provided between the flow-blocking platform and the mold core rod. The diameter of the first diversion hole is twice that of its outlet.

[0006] As a preferred embodiment of this utility model, the upper mold is provided with four pin holes.

[0007] As a preferred embodiment of this utility model, the flow-blocking platform reduces the diameter of the welding chamber channel to be the same as the diameter of the drainage channel.

[0008] As a preferred embodiment of this invention, the wall of the first diversion hole is made of hard alloy material.

[0009] As a preferred embodiment of this utility model, the back hole is processed before the mold heat treatment.

[0010] The beneficial effects of this utility model are as follows: This invention achieves synchronous pressurization by setting a flow-blocking platform near the lower die in the welding chamber and first flow-diverting holes at the four corners of the upper die. The structural design of the flow-blocking platform and the flow-diverting holes in the upper die reduces the diameter of the flow channel. This design effectively optimizes the flow path of the metal material during extrusion, increases flow rate and pressure, and ensures that the material uniformly fills the die cavity under high pressure.

[0011] This invention arranges the machining process of the mold back hole before heat treatment, and directly machines it into place using CNC. This design avoids the machining difficulties caused by the increased material hardness after heat treatment, while shortening the machining time of subsequent processes and improving machining efficiency and precision. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a cross-sectional schematic diagram of the present invention; Figure 3 This is a schematic diagram of the first diversion hole structure of this utility model.

[0013] Reference numerals: 1. Upper mold; 2. Lower mold; 11. Pin hole; 12. Discharge bridge; 13. First diversion hole; 14. Second diversion hole; 15. Mold core rod; 16. Welding chamber; 17. Flow barrier; 18. Drainage channel; 19. Back hole; 131. Hole wall; 132. Outlet. Detailed Implementation Example 1

[0014] like Figures 1 to 3 As shown, this utility model proposes: an extrusion die for automotive crossbeam profiles, comprising: an upper die connected to a lower die; four first diversion holes are respectively provided at the four corners of one side of the upper die, four second diversion holes are provided between the gaps of the first diversion holes, and a die core rod is connected in the middle of the four second diversion holes; a discharge bridge is provided on the side of the lower die away from the upper die, and several back holes are provided between the gaps of the discharge bridge; a welding chamber is provided at the connection between the lower die and the upper die, and a flow-blocking platform for narrowing the flow channel is provided on the side of the welding chamber near the lower die; a flow-guiding channel is provided between the flow-blocking platform and the die core rod; the diameter of the first diversion hole is twice that of its outlet.

[0015] The upper mold is provided with four pin holes.

[0016] The flow-blocking platform reduces the diameter of the welding chamber channel to be the same as the diameter of the drainage channel.

[0017] The wall of the first diversion hole is made of hard alloy material.

[0018] Working principle: Metal billets (such as aluminum alloys) enter the cavity between the upper and lower molds through the mold inlet; the metal billets first pass through the four first diversion holes of the upper mold, the diameter of which is twice that of the outlet, which can effectively improve the material flow rate and pressure; four second diversion holes are set in the gap between the first diversion holes to further optimize the material flow path and ensure that the material is evenly distributed to all parts of the mold; the mold core rod is used to guide the flow of the material and ensure that the material is evenly distributed in the mold cavity; when the metal material passes through the welding chamber, the welding chamber ensures that the material is fully bonded at the joint of the mold and avoids insufficient pressure due to excessive flow channel.

[0019] The flow-blocking platform reduces the diameter of the welding chamber channel to the same size as the drainage channel. This design further increases the material flow rate and pressure, ensuring that the material fills the mold cavity evenly under high pressure. The drainage channel between the flow-blocking platform and the mold core rod further optimizes the material flow path, ensuring that the material is evenly distributed within the mold cavity. The metal material is discharged from the mold through the discharge bridge. Several back holes are provided in the gap of the discharge bridge. The back holes assist in the discharge of the material and avoid defects caused by material accumulation. This utility model reduces the diameter of the flow channel through the structural design of the flow-blocking platform and the upper mold diversion hole, thereby achieving synchronous pressurization.

[0020] With a 5,500-ton press and a small extrusion ratio, this design can significantly improve the flow properties of the material, avoid poor filling due to insufficient pressure, and thus improve the quality of extruded products. Example 2

[0021] The difference between this embodiment and Embodiment 1 is that the back hole processing step described in this embodiment is performed before the mold heat treatment; The back hole is machined directly by CNC before the mold is heat-treated, avoiding the machining difficulties caused by the increased material hardness after heat treatment. This design not only shortens the processing time of subsequent processes, but also improves processing efficiency and accuracy. At the same time, it reduces dimensional deformation caused by stress changes during heat treatment, ensuring the dimensional accuracy and service life of the mold.

[0022] The processing method in Example 2 enables the mold to withstand greater pressure when the flow hole is reduced and pressurized, avoiding mold damage due to insufficient strength in the back hole area, thus making the synchronous pressurization effect in Example 1 even better.

[0023] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0024] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An extrusion die for a crossbeam profile for automobiles, comprising an upper die (1) and a lower die (2) connected to the upper die (1); Its features are, The upper mold (1) has four corners with first diversion holes (13) respectively. Four second diversion holes (14) are provided between the gaps of the first diversion holes (13). The core rod (15) is connected in the middle of the four second diversion holes (14). The lower mold (2) has a discharge bridge (12) on the side away from the upper mold (1). Several back holes (19) are provided between the gaps of the discharge bridge (12). A welding chamber (16) is provided at the connection between the lower mold (2) and the upper mold (1). A flow-blocking platform (17) for narrowing the flow channel is provided on the side of the welding chamber (16) near the lower mold (2). A flow-guiding channel (18) is provided between the flow-blocking platform (17) and the core rod (15). The diameter of the first diversion hole (13) is twice that of its outlet (132).

2. The extrusion die for automotive crossbeam profiles according to claim 1, characterized in that, The upper mold (1) is provided with four pin holes (11).

3. The extrusion die for automotive crossbeam profiles according to claim 1, characterized in that, The flow-blocking platform (17) reduces the diameter of the channel of the welding chamber (16) to the same diameter as the flow channel (18).

4. The extrusion die for automotive crossbeam profiles according to claim 1, characterized in that, The hole wall (131) of the first diversion hole (13) is made of hard alloy material.

5. The extrusion die for automotive crossbeam profiles according to claim 1, characterized in that, The back hole (19) is processed before the mold heat treatment.

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