Aluminum alloy extrusion die capable of being rapidly cooled

Abstract

The utility model relates to the technical field of extrusion dies, and discloses an aluminum alloy extrusion die capable of being rapidly cooled, rapid cooling is realized by arranging an injection nozzle opening, a rapid cooling device, a cooling cylinder and other structures, an airflow medium is conveyed into a sliding hole through the injection nozzle opening after the extrusion work is finished, and the cooling cylinder is pushed by the airflow medium to cool the aluminum alloy extrusion die. When the cooling cylinder extends out of the sliding hole to the maximum degree, an air flow medium is filled into the cooling cylinder through a one-way valve, so that the air flow medium is sprayed out from the spraying hole and the air hole, the spraying hole sprays out in the inclined backward direction, the mold inner shell and the primary material hole are cooled, the air hole cools the interior of the rectangular groove, and rapid cooling of the surface in contact with the blank is achieved; and the rapid cooling effect is achieved.

Description

Technical Field

[0001] This utility model relates to the field of extrusion die technology, and in particular to an aluminum alloy extrusion die that can be rapidly cooled. Background Technology

[0002] An aluminum alloy extrusion die is a tool used for extruding aluminum materials. By applying high pressure to the aluminum alloy billet in the die, it is forced through the die orifice to form the desired cross-sectional shape and size. This process not only determines the shape and size of the final product, but also refines and improves the grain structure of the aluminum alloy through strong shearing and deformation forces.

[0003] In the existing technology, there are certain shortcomings in the temperature cooling of extrusion dies. For example, after the extrusion work is completed, the cooling cycle of the die is relatively long, and it is impossible to achieve rapid cooling in order to prepare for the next extrusion. In addition, the die cooling can usually only cool the inside of the die and cannot quickly cool the contact surface between the inner wall of the die and the aluminum alloy billet. Utility Model Content

[0004] To address the shortcomings of existing technologies, this invention provides a rapidly cooling aluminum alloy extrusion die, which has the advantages of rapid internal wall cooling and enhanced heat exchange efficiency, thus solving the problems mentioned in the background technology.

[0005] This utility model provides the following technical solution: a rapidly cooling aluminum alloy extrusion die, comprising an inner die shell, a outer die shell snapped onto one side of the inner die shell, symmetrically provided slides on the outer rings of the outer die shell and the inner die shell, symmetrically provided inserts on one side of the inner die shell, and uniformly provided limit holes in a circular pattern on the other side of the inner die shell, a preliminary material hole penetrating through the inner die shell and uniformly provided in a circular pattern, a water passage opening at the bottom of the other side of the inner die shell, a cooling water groove located on the outer ring of the preliminary material hole inside the inner die shell, the water passage opening being connected to the cooling water groove, a forming head fixedly installed in the middle of the other side of the inner die shell between the preliminary material holes, a sliding hole inside the inner die shell, a rapid cooling device installed inside the sliding hole, a rectangular groove in the middle of the outer die shell, a ring retaining groove on the outer ring of the outer die shell, and inserts arranged in a circular array on the side of the outer die shell near the inner die shell, the inserts being adapted to the shape of the limit holes.

[0006] With the above structural design, in actual operation, this device is designed to use two different cooling methods, namely cooling water channels and cooling air channels, to cool the inner and outer surfaces of the mold inner shell and the mold outer shell. The air channels are used to cool the inner surface of the mold. Since the inner surface is in contact with the blank, if the temperature is too high, cooling water is used to cool the mold when the internal temperature is stable.

[0007] Preferably, the inner wall of the top of the ring groove is provided with a water groove opening, and the inner wall of the ring groove is provided with a sealing gasket around the water groove opening. The interior of the mold shell is provided with a water cavity around the outer ring of the rectangular groove, and the water cavity is connected to the water groove opening. The side of the mold shell near the inner shell of the mold is provided with a confluence port at the position corresponding to the water groove opening, and the confluence port is connected to the water cavity. The water cavity is symmetrically fixedly installed with baffles, and the baffles are uniformly fixedly installed in a linear array inside the water cavity. The baffles are spiral in shape. One side of the mold shell is provided with a spout.

[0008] With the above structural design, the baffle strips turbulent the cooling water inside the water cavity, creating turbulence as the cooling water flows. This increases the heat exchange efficiency between the mold and the cooling water, making the temperature inside the mold more stable after being turbulent by the baffle strips.

[0009] Preferably, the rapid cooling device includes a cooling cylinder, which is slidably installed inside the sliding hole. The end of the rapid cooling device near the molding head has a spray hole in an annular shape, and the spray direction of the spray hole is oblique. A flow channel is formed between the sliding hole and the injection nozzle, and the flow channel includes two parts, one part of which is located inside the mold outer shell and the insert, and the other part is located inside the mold inner shell.

[0010] With the above structural setup, the airflow medium is injected into the cooling cylinder through a one-way valve, causing the airflow medium to be ejected from the nozzle and air hole. The nozzle is ejected obliquely backward, which cools the inner shell of the mold and the initial material hole, while the air hole cools the inside of the rectangular groove, thus achieving rapid cooling of the surface in contact with the blank.

[0011] Preferably, the outer surface of the cooling cylinder is provided with uniformly distributed air holes in a circular pattern, and the air holes are uniformly distributed in a linear array on the surface of the cooling cylinder. The interior of the cooling cylinder is provided with a one-way valve, and the interior of the cooling cylinder is connected to the interior of the sliding hole. The gas used for cooling can be a mixture of compressed gas and liquid nitrogen, and the liquid used for cooling can be cooling water.

[0012] With the above structural setup, when the cooling is complete and the extrusion work needs to be carried out again, the injection of gas flow medium is stopped and the force is switched to suction. Due to the one-way valve, the gas inside and outside the cooling cylinder cannot be sucked away through the one-way valve. The cooling cylinder will slide into the sliding hole due to the suction, thus achieving the contraction of the cooling cylinder.

[0013] This utility model has the following advantages:

[0014] 1. This rapidly cooling aluminum alloy extrusion die achieves rapid cooling by incorporating a nozzle, a rapid cooling device, and a cooling cylinder. After extrusion, the gas flow medium is delivered into the sliding hole through the nozzle. The cooling cylinder extends outward under the push of the gas flow medium. When the cooling cylinder extends to its maximum extent through the sliding hole, the gas flow medium is injected into the cooling cylinder through a one-way valve, causing the gas flow medium to be ejected from the nozzle and air hole. The nozzle ejects obliquely backward, cooling the inner shell of the die and the initial material hole, while the air hole cools the interior of the rectangular groove, achieving rapid cooling of the surfaces in contact with the billet and resulting in a rapid cooling effect.

[0015] 2. This rapidly cooling aluminum alloy extrusion die achieves stable cooling through the design of a water cavity, baffles, and a cooling water tank. Cooling water is injected into the interior of the die's inner and outer shells. The cooling water first flows into the water cavity through the water tank opening. After being turbulent by the baffles, the cooling water in the water cavity quickly flows towards the confluence point and then enters the interior of the die's inner shell. After the flow is complete, it flows out from the top side of the cooling water tank. The cooling water effectively controls the temperature inside the die's inner and outer shells, achieving a stable internal cooling effect. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is an exploded view of the overall structure of this utility model;

[0018] Figure 3 This is a schematic diagram of the internal structure of the present utility model;

[0019] Figure 4 This is a schematic diagram of the internal structure of the present utility model from another perspective.

[0020] In the diagram: 1. Mold inner shell; 11. Insert plate; 12. Limiting hole; 13. Initial material hole; 14. Water channel opening; 15. Cooling water tank; 16. Shaping head; 17. Sliding hole; 2. Mold outer shell; 21. Rectangular groove; 22. Ring groove; 23. Insert post; 24. Water channel opening; 25. Water cavity; 26. Baffle strip; 27. Injection nozzle; 3. Slide rail; 4. Rapid cooling device; 41. Flow channel; 42. One-way valve. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figures 1-4 A rapidly cooling aluminum alloy extrusion die includes an inner die shell 1, a outer die shell 2 snapped onto one side of the inner die shell 1, and symmetrically arranged slides 3 on the outer rings of the outer die shell 2 and the inner die shell 1. One side of the inner die shell 1 has symmetrically arranged inserts 11, and the other side of the inner die shell 1 has uniformly arranged annular limit holes 12. A preliminary material hole 13, also uniformly arranged in annular shape, is opened through the interior of the inner die shell 1. A water passage 14 is opened at the bottom of the other side of the inner die shell 1. The interior of the inner die shell 1 is located within the preliminary material hole 1. The outer ring is provided with a cooling water tank 15, and the water inlet 14 is connected to the cooling water tank 15. The molding head 16 is fixedly installed in the middle of the other side of the inner shell 1 between the initial material holes 13. The inner shell 1 is provided with a sliding hole 17, and a rapid cooling device 4 is installed inside the sliding hole 17. The middle of the outer shell 2 is provided with a rectangular groove 21. The outer ring of the outer shell 2 is provided with a ring groove 22. The side of the outer shell 2 near the inner shell 1 is provided with a circular array of insertion posts 23, and the shape of the insertion posts 23 is adapted to the limiting hole 12.

[0023] In actual operation of this device, after extruding aluminum alloy billets, if the temperature of the billet is too high and the mold temperature remains too high for a long time, the shape and structure of the mold may not be stable enough, resulting in defects in the extruded finished product. Therefore, two different cooling methods, namely cooling water channels and cooling air channels, are designed to cool the inner and outer surfaces of the mold inner shell 1 and the mold outer shell 2. The air channels are used to cool the inner surface of the mold. Since the inner surface is in contact with the billet, the temperature is too high. When the internal temperature of the mold is stable, cooling water is used to cool it down.

[0024] Please see Figures 1-4 The inner wall of the ring groove 22 has a water inlet 24. The inner wall of the ring groove 22 is provided with a sealing gasket around the water inlet 24. When the water inlet 24 is connected to the water supply port, the sealing gasket can prevent water leakage at the connection. The interior of the mold shell 2 has a water cavity 25 around the rectangular groove 21. The water cavity 25 is connected to the water inlet 24. On the side of the mold shell 2 near the inner mold shell 1, a merging port is provided at the position corresponding to the water inlet 14. The merging port is connected to the water cavity 25. After the inner mold shell 1 and the mold shell 2 are combined, the merging port and the water inlet 14 are sealed and flow through. The water cavity 25 is symmetrically fixedly installed with baffles 26. The baffles 26 are uniformly fixedly installed in a linear array inside the water cavity 25. The baffles 26 are spiral in shape. The function of the baffles 26 is to disturb the flowing liquid and add to the flow of the liquid, so that the liquid and the mold shell 2 can exchange heat faster. One side of the mold shell 2 is provided with a spout 27.

[0025] Since the inner walls of the rectangular groove 21 are in contact with the blank, and the conventional cooling method has a slow cooling speed and unstable temperature, the baffle strip 26 is set to turbulently flow the cooling water inside the water cavity 25, so that the cooling water forms turbulence when it flows, which increases the heat exchange efficiency between the mold and the cooling water, and makes the temperature inside the mold more stable after being turbulent by the baffle strip 26.

[0026] Please see Figures 1-4 The rapid cooling device 4 includes a cooling cylinder, which is slidably installed inside the sliding hole 17. The end of the rapid cooling device 4 near the molding head 16 has a ring-shaped spray hole with an oblique spray direction. The spray hole is used to cool the interior of the initial material hole 13 when the material is slid out for cooling. A flow channel 41 is provided between the sliding hole 17 and the injection nozzle 27. The flow channel 41 includes two parts, one part of which is located inside the mold shell 2 and the insert 23, and the other part is located inside the mold inner shell 1.

[0027] By injecting the airflow medium into the flow channel 41 through the nozzle 27, it is conveyed into the sliding hole 17 after the extrusion work is completed. The cooling cylinder is pushed outward by the airflow medium. When the cooling cylinder extends out of the sliding hole 17 to its maximum extent, the airflow medium is filled into the cooling cylinder through the one-way valve 42, so that the airflow medium is sprayed out from the nozzle and the air hole. The nozzle sprays out obliquely backward, which cools the inner shell 1 of the mold and the initial material hole 13. The air hole cools the inside of the rectangular groove 21, thereby achieving rapid cooling of the surface in contact with the blank.

[0028] Please see Figures 1-4 The outer surface of the cooling cylinder is uniformly provided with pores in a circular pattern. The pores are arranged in a linear array and uniformly provided on the surface of the cooling cylinder. The interior of the cooling cylinder is provided with a one-way valve 42. The interior of the cooling cylinder is connected to the interior of the sliding hole 17. The cooling gas can be a mixture of compressed gas and liquid nitrogen. The cooling liquid can be cooling water. Nanoparticles such as copper and aluminum oxides can be added to the cooling water to improve the heat transfer efficiency.

[0029] When cooling is complete and extrusion is required again, the injection of gas flow medium is stopped and the pressure is switched to suction. Due to the setting of the one-way valve 42, the gas inside and outside the cooling cylinder cannot be sucked away through the one-way valve 42. The cooling cylinder will slide into the sliding hole 17 due to the suction, thereby shrinking the cooling cylinder. After shrinkage is completed, extrusion can be performed. The user can use the program control to set the cooling cycle.

[0030] Working principle: After the inner mold shell 1 and outer mold shell 2 are sequentially installed on the extrusion device, their positions are fixed. Cooling water is injected into the interior of the inner mold shell 1 and outer mold shell 2. The cooling water first flows into the water cavity 25 through the water tank opening 24. After being turbulent by the baffle 26, the cooling water in the water cavity 25 quickly flows towards the confluence port and then enters the interior of the inner mold shell 1. After the flow is complete, it flows out from the top side of the cooling water tank 15. The temperature inside the inner mold shell 1 and outer mold shell 2 is stably controlled by the cooling water. The mold is then used to press the billet. After extrusion, the initial material hole 13 and the inner wall of the rectangular groove 21 come into contact with the billet, and the temperature rises rapidly. After extrusion, the airflow medium is delivered into the sliding hole 17 through the injection nozzle 27 and the water channel 14. The cooling cylinder is pushed outward by the airflow medium. When the cooling cylinder extends out of the sliding hole 17 to its maximum extent, the airflow medium is injected into the cooling cylinder through the one-way valve 42, causing the airflow medium to be sprayed out from the nozzle and air hole to cool the initial material hole 13 and the inner wall of the rectangular groove 21. After cooling, the injection is switched to suction, and the cooling cylinder is sucked back into the sliding hole 17 for the next extrusion operation.

Claims

1. A rapidly cooling aluminum alloy extrusion die, comprising a die inner shell (1), characterized in that: One side of the inner mold shell (1) is fitted with a mold outer shell (2). The outer shell (2) and the outer ring of the inner mold shell (1) are symmetrically provided with slides (3). One side of the inner mold shell (1) is symmetrically provided with inserts (11). The other side of the inner mold shell (1) is provided with uniformly spaced limit holes (12) in a circular pattern. A preliminary material hole (13) is provided through the interior of the inner mold shell (1) and is uniformly spaced in a circular pattern. A water channel (14) is provided at the bottom of the other side of the inner mold shell (1). A cooling water channel (15) is provided around the outer ring of the preliminary material hole (13) inside the inner mold shell (1). The water inlet (14) is connected to the cooling water tank (15). A shaping head (16) is fixedly installed in the middle of the other side of the inner shell of the mold (1) between the initial material hole (13). A sliding hole (17) is opened inside the inner shell of the mold (1). A rapid cooling device (4) is installed inside the sliding hole (17). A rectangular groove (21) is opened in the middle of the outer shell of the mold (2). A ring groove (22) is opened on the outer ring of the outer shell of the mold (2). A ring-shaped insertion post (23) is opened on the side of the outer shell of the mold (2) close to the inner shell of the mold (1). The insertion post (23) is adapted to the shape of the limiting hole (12).

2. The rapidly cooling aluminum alloy extrusion die according to claim 1, characterized in that: The inner wall of the ring groove (22) is provided with a water trough opening (24). The inner wall of the ring groove (22) is provided with a sealing gasket around the water trough opening (24). The mold shell (2) is provided with a water cavity (25) around the rectangular groove (21). The water cavity (25) is connected to the water trough opening (24). The side of the mold shell (2) near the inner shell (1) of the mold is provided with a confluence opening at the position corresponding to the water trough opening (14). The confluence opening is connected to the water cavity (25). The water cavity (25) is symmetrically fixedly installed with baffle strips (26). The baffle strips (26) are uniformly fixedly installed in a linear array inside the water cavity (25). The baffle strips (26) are spiral in shape. The mold shell (2) is provided with a nozzle opening (27) on one side.

3. The rapidly cooling aluminum alloy extrusion die according to claim 2, characterized in that: The rapid cooling device (4) includes a cooling cylinder, which is slidably installed inside the sliding hole (17). The end of the rapid cooling device (4) near the molding head (16) is provided with a spray hole in a circular shape. The spray direction of the spray hole is oblique. A flow channel (41) is provided between the sliding hole (17) and the nozzle (27). The flow channel (41) includes two parts, one part of which is located inside the mold shell (2) and the insert (23), and the other part is located inside the mold inner shell (1).

4. The rapidly cooling aluminum alloy extrusion die according to claim 3, characterized in that: The outer surface of the cooling cylinder is provided with uniformly distributed air holes in a circular pattern. The air holes are arranged in a linear array and uniformly distributed on the surface of the cooling cylinder. The interior of the cooling cylinder is provided with a one-way valve (42). The interior of the cooling cylinder is connected to the interior of the sliding hole (17). The gas used for cooling can be a mixture of compressed gas and liquid nitrogen, and the liquid used for cooling can be cooling water.

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