Micro-channel aluminum alloy flat pipe extrusion die

Abstract

The utility model relates to the technical field of aluminum alloy flat tube forming, in particular to a micro-channel aluminum alloy flat tube extrusion die which comprises an upper die and a lower die, a rectangular mounting hole is formed in the upper die, a mounting block is inserted in the mounting hole, a male die core is fixedly mounted at one end, close to the lower die, of the mounting block, and a female die core is fixedly mounted at the other end of the mounting block. A mounting block is arranged on the upper die, a locking assembly for locking the mounting block is arranged on the mounting block, a cylindrical groove is formed in the end, away from the upper die, of the lower die, a female die core is inserted into the cylindrical groove, a plurality of limiting grooves are formed in the inner wall of the cylindrical groove, limiting blocks are inserted into the limiting grooves, inserting holes are formed in the surfaces of the limiting blocks, and the limiting blocks are inserted into the inserting holes. Threaded holes are formed in the inner walls of the limiting grooves, and screws are inserted into the inserting holes. The female die core and the male die core in the die are designed to be detachable, the male die core and the female die core can be detached from the upper die and the lower die respectively and conveniently, the whole die does not need to be replaced, and therefore cost is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of aluminum alloy flat tube forming, in particular to a micro-channel aluminum alloy flat tube extrusion die. Background Art

[0002] Microchannel porous aluminum flat tubes are widely used in the fields of automotive air-conditioning and household air-conditioning. They are the main material for manufacturing heat exchangers. They are generally 12 to 16 mm wide and 1 to 2 mm high. During the production process, aluminum alloy flat tubes are extruded into aluminum alloy flat tubes through extrusion dies in a high temperature environment.

[0003] During the production and extrusion process of aluminum alloy flat tubes, the core of the extrusion die is subjected to great stress when working in a high temperature and high pressure environment. After long-term use, the core will be damaged, so the core has a certain service life. The core in the existing extrusion die is integrally formed with the die. When the core is damaged, the entire die needs to be replaced. The replacement of the entire die will result in a higher production cost of the aluminum alloy flat tube. Utility Model Content

[0004] The purpose of the utility model is to solve the following shortcomings in the prior art: the mold core in the existing extrusion mold is integrally formed with the mold. When the mold core is damaged, the entire mold needs to be replaced. The replacement of the entire mold will result in a higher production cost of the aluminum alloy flat tube, and a microchannel aluminum alloy flat tube extrusion mold is proposed.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A microchannel aluminum alloy flat tube extrusion die, comprising an upper die and a lower die, wherein the upper die and the lower die are connected via a connecting assembly, wherein a rectangular mounting hole is provided on the upper die, wherein a mounting block is inserted into the mounting hole, wherein a male die core is fixedly mounted on one end of the mounting block close to the lower die, and wherein a locking assembly for locking the mounting block is provided on the mounting block;

[0007] A cylindrical groove is provided at one end of the lower die away from the upper die, a die core is inserted into the cylindrical groove, a plurality of limit grooves are provided on the inner wall of the cylindrical groove, limit blocks are inserted in each of the limit grooves, the limit blocks are fixedly connected to the die core, insertion holes are provided on the surfaces of the limit blocks, a threaded hole is provided on the inner wall of the limit groove, a screw is inserted in the insertion hole, and one end is inserted in the threaded hole.

[0008] Preferably, positioning grooves are provided on the inner walls on both sides of the mounting hole, and L-shaped holes are symmetrically provided on the upper surface of the mounting block. The locking assembly includes two L-shaped positioning blocks respectively slidably installed in the two L-shaped holes and two telescopic springs respectively fixedly installed on the two positioning blocks, one end of the telescopic spring away from the positioning block is fixedly connected to the inner wall of the positioning groove, and one end of the positioning block is inserted in the positioning groove.

[0009] Preferably, connecting holes are symmetrically provided on the upper mold, and the connecting assembly includes two connecting rods and two nuts vertically fixed on the lower mold. The two connecting rods are respectively inserted into the two connecting holes, one end of the two connecting rods is provided with threads, and the two nuts are respectively threadedly inserted on the two connecting rods.

[0010] Preferably, a cooling sleeve is fixedly mounted on the die core, and a cooling assembly is disposed inside the cooling sleeve.

[0011] Preferably, the cooling assembly comprises two gas nozzles symmetrically fixedly mounted on the inner wall of the cooling jacket and two nitrogen delivery pipes, and one end of the two nitrogen delivery pipes is respectively connected to the two gas nozzles.

[0012] Preferably, a die pad is fixedly mounted on a surface of the upper die close to the lower die.

[0013] In the utility model, the beneficial effects are:

[0014] The die core and punch core in the mold are designed to be detachable. Through the cooperation of the mounting block, the locking assembly, the limit block and the screw, the punch core and the die core can be conveniently removed from the upper mold and the lower mold respectively, so that the new core can be replaced without replacing the entire mold, thereby saving costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the front view of a three-dimensional structure of a micro-channel aluminum alloy flat tube extrusion die proposed by the utility model;

[0016] Figure 2 This is a bottom-up three-dimensional structural schematic diagram of a micro-channel aluminum alloy flat tube extrusion die proposed by the utility model;

[0017] Figure 3 This is a three-dimensional exploded structural schematic diagram of a microchannel aluminum alloy flat tube extrusion die proposed by the utility model;

[0018] Figure 4 This is a schematic cross-sectional structure diagram of an upper die and a lower die in a micro-channel aluminum alloy flat tube extrusion die proposed by the utility model;

[0019] Figure 5 for Figure 4A magnified view of the structure in the middle.

[0020] In the figure: 1 upper die, 2 lower die, 3 mounting block, 4 punch core, 5 die core, 6 limit block, 7 screw, 8 positioning block, 9 telescopic spring, 10 connecting rod, 11 nut, 12 cooling sleeve, 13 gas nozzle, 14 nitrogen delivery pipe. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0022] Reference Figure 1-Figure 5 , a microchannel aluminum alloy flat tube extrusion die, comprising an upper die 1 and a lower die 2, the upper die 1 and the lower die 2 are connected by a connecting component, a rectangular mounting hole is provided on the upper die 1, a mounting block 3 is inserted in the mounting hole, a male die core 4 is fixedly installed on one end of the mounting block 3 close to the lower die 2, a locking component for locking itself is provided on the mounting block 3, positioning grooves are provided on the inner walls on both sides of the mounting hole, and L-shaped holes are symmetrically provided on the upper surface of the mounting block 3, the locking component comprises two L-shaped positioning blocks 8 respectively slidably mounted in the two L-shaped holes and two telescopic springs 9 respectively fixedly mounted on the two positioning blocks 8, one end of the telescopic spring 9 away from the positioning block 8 is fixedly connected to the inner wall of the positioning groove, and one end of the positioning block 8 is inserted in the positioning groove;

[0023] When the punch core 4 in the upper die 1 is worn, the two positioning blocks 8 can be driven to approach each other, the telescopic spring 9 is compressed, one end of the two positioning blocks 8 is pulled out from the positioning groove, the lock of the mounting block 3 is released, and then the mounting block 3 is moved upward, and the punch core 4 is taken out from the upper die 1 through the mounting block 3. When replacing a new punch core 4, it is only necessary to insert the mounting block 3 with the new punch core 4 into the mounting hole, and insert one end of the positioning block 8 into the positioning groove.

[0024] A cylindrical groove is provided at one end of the lower mold 2 away from the upper mold 1, a die core 5 is inserted in the cylindrical groove, a plurality of limit grooves are provided on the inner wall of the cylindrical groove, limit blocks 6 are inserted in each of the limit grooves, the limit blocks 6 are fixedly connected to the die core 5, insertion holes are provided on the surfaces of the limit blocks 6, a threaded hole is provided on the inner wall of the limit groove, a screw 7 is inserted in the insertion hole, and one end is inserted in the threaded hole.

[0025] When disassembling the die core 5, use tools to unscrew the multiple screws 7 from the limit blocks 6, and then move the multiple limit blocks 6 out of the limit grooves. When installing, it is only necessary to insert the limit blocks 6 on the new die core 5 into the limit grooves, and then install the limit blocks 6 in the limit grooves by screws 7. The punch core 4 and the die core 5 can be conveniently removed from the upper mold 1 and the lower mold 2 respectively, so as to replace the new core without replacing the entire mold, thereby saving costs.

[0026] The upper mold 1 is symmetrically provided with connecting holes, and the connecting assembly includes two connecting rods 10 and two nuts 11 vertically fixedly installed on the lower mold 2. The two connecting rods 10 are respectively inserted into the two connecting holes, and one end of the two connecting rods 10 is provided with threads, and the two nuts 11 are respectively threadedly inserted on the two connecting rods 10;

[0027] When assembling the upper mold 1 and the lower mold 2, the two connecting rods 10 on the lower mold 2 are respectively inserted into the two connecting holes, and then the nut 11 is screwed on the threaded end of the connecting rod 10 until the nut 11 contacts the upper surface of the upper mold 1, thereby completing the assembly of the upper mold 1 and the lower mold 2.

[0028] A cooling jacket 12 is fixedly mounted on the die core 5, and a cooling assembly is arranged inside the cooling jacket 12. The cooling assembly includes two gas nozzles 13 and two nitrogen delivery pipes 14 symmetrically fixedly mounted on the inner wall of the cooling jacket 12, and one end of the two nitrogen delivery pipes 14 is connected to the two gas nozzles 13 respectively;

[0029] The nitrogen delivery pipe 14 can continuously deliver nitrogen to the gas nozzle 13 , and then spray it out through the gas nozzle 13 . The sprayed nitrogen can cool the formed flat tube and effectively prevent the flat tube from deforming.

[0030] A die pad is fixedly mounted on one side of the upper die 1 close to the lower die 2, and the die pad can reduce the gap between the upper die 1 and the lower die 2, so that the connection between the two is tighter.

[0031] In the utility model, the female mold core 5 and the male mold core 4 in the mold are designed to be detachable. When replacing the male mold core 4, it is only necessary to release the lock of the locking assembly on the mounting block 3. When replacing the female mold core 5, it is only necessary to unscrew the screw 7 from the limit block 6, and then take the limit block 6 out of the limit groove. The male mold core 4 and the female mold core 5 can be conveniently disassembled from the upper mold 1 and the lower mold 2 respectively, so as to replace the new mold core without replacing the entire mold, thereby saving costs.

[0032] In general, with respect to the technical problem: the cores in the existing extrusion dies are integrally formed with the dies, and when the cores are damaged, the entire die needs to be replaced, and the replacement of the entire die will result in a high production cost for the aluminum alloy flat tubes; a technical solution is adopted: through the cooperation of the mounting block 3, the locking assembly, the limit block 6 and the screw 7, the punch core 4 and the die core 5 can be conveniently disassembled from the upper die 1 and the lower die 2 respectively; because the implementation process of the technical solution is: the die core 5 and the punch core 4 in the die are designed to be detachable, when replacing the punch core 4, it is only necessary to release the locking assembly on the mounting block 3, and when replacing the die core 5, it is only necessary to unscrew the screw 7 from the limit block 6, and then remove the limit block 6 from the limit groove, and the punch core 4 and the die core 5 can be conveniently disassembled from the upper die 1 and the lower die 2 respectively, so as to replace the new cores; so the technical problem can be solved inevitably, and the technical effect achieved is: there is no need to replace the entire die, thereby saving costs.

[0033] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A microchannel aluminum alloy flat tube extrusion die, comprising an upper die (1) and a lower die (2), characterized in that: The upper die (1) and the lower die (2) are connected via a connecting assembly; a rectangular mounting hole is provided on the upper die (1); a mounting block (3) is inserted into the mounting hole; a male die core (4) is fixedly mounted on one end of the mounting block (3) close to the lower die (2); and a locking assembly for locking the mounting block (3); A cylindrical groove is provided at one end of the lower die (2) away from the upper die (1), a die core (5) is inserted into the cylindrical groove, a plurality of limit grooves are provided on the inner wall of the cylindrical groove, a plurality of limit blocks (6) are inserted into the limit grooves, the plurality of limit blocks (6) are fixedly connected to the die core (5), a plurality of insertion holes are provided on the surface of the limit blocks (6), a threaded hole is provided on the inner wall of the limit groove, a screw (7) is inserted into the insertion hole, and one end of the screw is inserted into the threaded hole.

2. The microchannel aluminum alloy flat tube extrusion die according to claim 1, characterized in that: The inner walls on both sides of the mounting hole are provided with positioning grooves, the upper surface of the mounting block (3) is symmetrically provided with L-shaped holes, the locking assembly comprises two L-shaped positioning blocks (8) respectively slidably mounted in the two L-shaped holes and two telescopic springs (9) respectively fixedly mounted on the two positioning blocks (8), one end of the telescopic spring (9) away from the positioning block (8) is fixedly connected to the inner wall of the positioning groove, and one end of the positioning block (8) is inserted into the positioning groove.

3. The microchannel aluminum alloy flat tube extrusion die according to claim 1, characterized in that: The upper mold (1) is symmetrically provided with connecting holes, and the connecting assembly comprises two connecting rods (10) and two nuts (11) vertically fixedly mounted on the lower mold (2). The two connecting rods (10) are respectively inserted into the two connecting holes, one end of the two connecting rods (10) is provided with a thread, and the two nuts (11) are respectively threadedly inserted on the two connecting rods (10).

4. The microchannel aluminum alloy flat tube extrusion die according to claim 1, characterized in that: A cooling sleeve (12) is fixedly mounted on the die core (5), and a cooling component is arranged inside the cooling sleeve (12).

5. The microchannel aluminum alloy flat tube extrusion die according to claim 4, characterized in that: The cooling assembly comprises two gas nozzles (13) symmetrically fixedly mounted on the inner wall of the cooling jacket (12) and two nitrogen delivery pipes (14), one end of the two nitrogen delivery pipes (14) being respectively connected to the two gas nozzles (13).

6. The microchannel aluminum alloy flat tube extrusion die according to claim 1, characterized in that: A die pad is fixedly mounted on one side of the upper die (1) close to the lower die (2).

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