Aluminum alloy extrusion die with large wall thickness difference

Abstract

The utility model provides an aluminum alloy extrusion die with large wall thickness difference, which comprises a shell, two diversion trenches are arranged on the upper surface of the shell, a first diversion trench and a second diversion trench are communicated through a working tape, the working tape comprises a first part and a second part which are communicated, the first part is arranged close to the first diversion trench, and the second part is arranged close to the second diversion trench. A water blocking table is arranged between the first part and the second flow guide groove, and the second part penetrates through the water blocking table and extends into the second flow guide groove. According to the aluminum alloy extrusion die, the depth of the second flow guide groove is larger than that of the first flow guide groove, the remaining amount of aluminum alloy liquid at the second flow guide groove is larger, and the aluminum alloy liquid can flow to a thin-point working belt more easily under the guiding and pressurizing effects of the pressurizing angle; the water blocking table separates the aluminum alloy liquid at the first flow guide groove and the second flow guide groove to prevent the aluminum alloy liquid at the second flow guide groove from flowing towards the first flow guide groove, so that the aluminum alloy liquid at the first flow guide groove and the second flow guide groove can be relatively independently supplied, and the stability of the product size is ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of aluminum alloy extrusion, and in particular relates to an aluminum alloy extrusion die with large wall thickness difference. Background Art

[0002] In the field of aluminum alloy extrusion, the extrusion die is an important component in the production process of aluminum alloy products. With the widespread application of aluminum alloy tubes in automobiles, the shape and size of aluminum alloy products are getting higher and higher. Due to the uniqueness of the aluminum alloy extrusion die, the die is connected from front to back. The thicker the wall, the faster the aluminum flow rate during extrusion, and vice versa. At present, many aluminum alloy products have very different wall thicknesses, which makes it extremely difficult to control the flow rate in the thick and thin places, resulting in the product being unformed, unstable in size, and extremely low in qualified rate.

[0003] Therefore, there is an urgent need for an extrusion die that can optimize the die structure to ensure the dimensional stability of aluminum alloy products and improve production efficiency and product qualification rate. Utility Model Content

[0004] The purpose of the utility model is to overcome the shortcomings of the prior art and provide an aluminum alloy extrusion die with large wall thickness differences. The utility model optimizes the die structure to ensure the dimensional stability of aluminum alloy products and improve production efficiency and product qualification rate.

[0005] In order to achieve the above technical objectives, the technical solution adopted by the embodiment of the utility model is:

[0006] An aluminum alloy extrusion die with a large difference in wall thickness comprises a shell, wherein the upper surface of the shell is provided with two guide grooves, the first guide groove and the second guide groove are connected through a working belt, the working belt comprises a first part and a second part that are connected, the first part is arranged close to the first guide groove, a water blocking platform is arranged between the first part and the second guide groove, and the second part passes through the water blocking platform and extends into the second guide groove.

[0007] Further, in the thickness direction of the shell, the height of the first guide groove is less than the height of the second guide groove and less than the height of the working belt, and the height of the water blocking platform is greater than or equal to the height of the first guide groove.

[0008] Furthermore, the bottom of the second guide groove is connected to the shell through a boost angle transition, and the boost angle is a slope.

[0009] Furthermore, the working belt is arranged to penetrate the thickness direction of the shell, and the maximum thickness of the working belt is equal to the thickness of the shell.

[0010] Furthermore, the working zone is divided into a first part and a second part by the water blocking platform;

[0011] Along the direction from the first guide groove to the second guide groove, the wall thickness of the first part gradually decreases, and the wall thickness of the first part is greater than the wall thickness of the second part.

[0012] Furthermore, the outer wall of the shell is a variable diameter structure, which includes an upper end, a first middle end, a second middle end and a lower end from top to bottom, and the outer diameter of the upper end is less than the outer diameter of the second middle end and less than the outer diameter of the first middle end = the outer diameter of the lower end.

[0013] Furthermore, the aluminum alloy extrusion die is integrally formed, and the die surface has a nitride layer with a thickness of 100-200 μm.

[0014] The beneficial effects brought by the technical solution provided by the embodiment of the utility model are:

[0015] The aluminum alloy extrusion die of the utility model is suitable for the manufacture of aluminum alloy profiles with large differences in wall thickness. Due to the change of the die guide structure, during the extrusion process, the high-temperature aluminum is continuously pressurized by the extruder, and the aluminum metal enters the guide groove of the die. Since the depth of the second guide groove is greater than the depth of the first guide groove, when passing through the second guide groove, the aluminum alloy liquid retains a larger amount at the second guide groove, so that the aluminum required at the thin wall is fully supplied, and the guiding and pressurizing effects of the boost angle make it easier for the aluminum alloy liquid to flow to the thin point working zone.

[0016] The water blocking platform separates the aluminum alloy liquid at the first guide groove and the second guide groove, preventing the aluminum alloy liquid at the second guide groove from flowing to the first guide groove, so that the aluminum alloy liquid at the first guide groove and the second guide groove can be fed relatively independently, ensuring the stability of product size. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of an aluminum alloy extrusion die with a large difference in wall thickness in an embodiment of the present invention.

[0018] Figure 2 yes Figure 1 Left view of an aluminum alloy extrusion die with large wall thickness differences.

[0019] Figure 3 yes Figure 1 Top view of an aluminum alloy extrusion die with large wall thickness differences.

[0020] Figure 4 yes Figure 1 Bottom view of aluminum alloy extrusion die with large wall thickness difference.

[0021] Figure 5 It is a schematic structural diagram of a nitrided layer having a depth of 138.31 μm in an aluminum alloy extrusion die in an embodiment of the utility model.

[0022] Figure 6It is a schematic structural diagram of a nitrided layer having a depth of 136.95 μm in an aluminum alloy extrusion die in an embodiment of the utility model.

[0023] Explanation of the reference numerals: 1 - shell; 21 - first guide groove; 22 - second guide groove; 3 - working belt; 31 - first part; 32 - second part; 4 - water blocking platform; 5 - boost angle. DETAILED DESCRIPTION

[0024] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "inside, outside", "up, down", "left, right", etc. are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise stated, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention.

[0025] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0026] Example 1

[0027] like Figure 1-4 As shown, an aluminum alloy extrusion die with a large difference in wall thickness includes a shell 1, and two guide grooves are arranged on the upper surface of the shell 1. The first guide groove 21 and the second guide groove 22 are connected through a working belt 3. The working belt 3 includes a first part 31 and a second part 32 that are connected. The first part 31 is arranged close to the first guide groove 21, and a water blocking platform 4 is arranged between the first part 31 and the second guide groove 22. The second part 32 passes through the water blocking platform 4 and extends into the second guide groove 22.

[0028] In the thickness direction of the shell 1 , the height of the first guide groove 21 is less than the height of the second guide groove 22 and less than the height of the working belt 3 , and the height of the water blocking platform 4 is greater than or equal to the height of the first guide groove 21 .

[0029] The second guide groove 22 is transitionally connected to the housing 1 via a boost angle 5 , and the boost angle 5 is a slope.

[0030] The working belt 3 is arranged to penetrate through the thickness direction of the shell 1 , and the maximum thickness of the working belt 3 is equal to the thickness of the shell 1 .

[0031] The working belt 3 is divided into a first part 31 and a second part 32 by the water blocking platform 4;

[0032] Along the direction from the first guide groove 21 to the second guide groove 22 , the wall thickness of the first portion 31 gradually decreases, and the wall thickness of the first portion 31 is greater than the wall thickness of the second portion 32 .

[0033] The outer wall of the shell 1 is a variable diameter structure, including an upper end 11, a first middle end 12, a second middle end 13 and a lower end 14 from top to bottom, and the outer diameter of the upper end 11 is less than the outer diameter of the second middle end 13 and less than the outer diameter of the first middle end 12 = the outer diameter of the lower end 14.

[0034] The size of the first guide groove 21 is smaller than that of the second guide groove 22, and the aluminum alloy extrusion die is integrally formed. The die surface has a nitrided layer with a thickness of 100-200 μm. The nitrided layer formed by nitriding treatment can improve the surface hardness of the die.

[0035] Due to the change in the die guide structure, during the extrusion process, the high-temperature aluminum is continuously pressurized by the extruder, and the aluminum metal enters the die guide groove. Since the depth of the second guide groove 22 is 15 mm greater than the depth of the first guide groove 21, when passing through the second guide groove 22, the aluminum alloy liquid retains a larger amount at the second guide groove 22, so that the aluminum required at the thin wall is fully supplied. The guiding and pressurizing effect of the boost angle 5 makes it easier for the aluminum alloy liquid to flow to the thin point working zone.

[0036] The water blocking platform 4 separates the aluminum alloy liquid at the first guide groove 21 and the second guide groove 22 to prevent the aluminum alloy liquid at the second guide groove 22 from flowing to the first guide groove 21, so that the aluminum alloy liquid at the first guide groove 21 and the second guide groove 22 can be fed relatively independently to ensure the stability of product size.

[0037] Finally, it should be noted that the above specific implementation methods are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to examples, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. An aluminum alloy extrusion die with large wall thickness difference, characterized in that: The invention comprises a shell (1), wherein the upper surface of the shell (1) is provided with two guide grooves, the first guide groove (21) and the second guide groove (22) are connected via a working belt (3), the working belt (3) comprises a first part (31) and a second part (32) which are connected, the first part (31) being arranged close to the first guide groove (21), a water blocking platform (4) being arranged between the first part (31) and the second guide groove (22), and the second part (32) penetrating the water blocking platform (4) and extending into the second guide groove (22).

2. The aluminum alloy extrusion die with large wall thickness difference according to claim 1, characterized in that: In the thickness direction of the shell (1), the height of the first guide groove (21) is less than the height of the second guide groove (22) and less than the height of the working belt (3), and the height of the water blocking platform (4) is greater than or equal to the height of the first guide groove (21).

3. The aluminum alloy extrusion die with large wall thickness difference according to claim 1, characterized in that: The bottom of the second guide groove (22) is transitionally connected to the housing (1) via a boost angle (5), and the boost angle (5) is a slope.

4. The aluminum alloy extrusion die with large wall thickness difference according to claim 1, characterized in that: The working belt (3) is arranged to penetrate the shell (1) in a thickness direction, and the height of the working belt (3) is less than or equal to the thickness of the shell (1).

5. The aluminum alloy extrusion die with large wall thickness difference according to claim 1, characterized in that: The working belt (3) is divided into a first part (31) and a second part (32) by the water blocking platform (4); Along the direction from the first guide groove (21) to the second guide groove (22), the wall thickness of the first part (31) gradually decreases, and the wall thickness of the first part (31) is greater than the wall thickness of the second part (32).

6. The aluminum alloy extrusion die with large wall thickness difference according to claim 1, characterized in that: The outer wall of the shell (1) is a variable diameter structure, and comprises, from top to bottom, an upper end (11), a first middle end (12), a second middle end (13) and a lower end (14), wherein the outer diameter of the upper end (11) is less than the outer diameter of the second middle end (13) and less than the outer diameter of the first middle end (12) = the outer diameter of the lower end (14).

7. The aluminum alloy extrusion die with large wall thickness difference according to any one of claims 1 to 6, characterized in that: The aluminum alloy extrusion die is integrally formed, and the die surface has a nitride layer with a thickness of 100-200 μm.

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