Round tube type aluminum profile extrusion die capable of avoiding welding line

Abstract

The utility model discloses a round tube type aluminum profile extrusion die capable of avoiding welding lines, which comprises a die body, the die body comprises an upper die, a flow dividing bridge is arranged in the upper die, the flow dividing bridge is arranged to be herringbone, three flow dividing holes are formed in the upper die at intervals, and the three flow dividing holes are all arranged to be fan-shaped. According to the utility model, through the arrangement of the shunting holes which are integrally fan-shaped and have the length-width ratio of 4: 3, and the feeding surface is downwards and straightly milled to the top of the lower clearance cutter, and the chamfering surface, aluminum flow can be effectively guided, is uniformly distributed in the upper die and flows smoothly and stably, and the lower clearance cutter which is not less than 1mm can provide a stable transition surface for the aluminum flow, so that the production efficiency is improved. The aluminum flow is continuously supplied to the cavity on the premise that the aluminum flow is kept smooth and stable, so that welding lines caused by disordered flow and non-uniform distribution of the aluminum flow during welding of the surface of the circular tube type aluminum profile are effectively avoided, and the production quality of the profile is greatly improved.

Description

Technical Field

[0001] The utility model particularly relates to a round tube aluminum profile extrusion die capable of avoiding welding lines. Background Art

[0002] In the aluminum extrusion processing industry, aluminum alloy has low density, high strength, good plasticity, good extrusion formability, excellent electrical conductivity, thermal conductivity and corrosion resistance, and is safe and recyclable. Therefore, it is widely used in technical fields such as construction, electric vehicles, ships, aerospace, etc. At present, the production of aluminum profiles is usually completed by hot extrusion using molds at high temperatures. Different aluminum profiles have corresponding hot extrusion dies, so different profiles can be produced;

[0003] In air conditioning and automotive water cooling systems, the trend of round tube aluminum profiles replacing copper tubes has become quite obvious. The quality of the finished product is crucial to the performance and reliability of the system. However, when producing round tube aluminum profiles, the existing extrusion molds cannot effectively improve the flow of aluminum flow, and uneven flow rate and distribution often occur. As a result, the surface welding of the round tube aluminum profiles during molding is not sufficient, resulting in weld lines, which seriously affects the production quality of the profiles.

[0004] Therefore, it is necessary to invent a round tube aluminum profile extrusion die that can avoid welding lines to solve the above problems. Utility Model Content

[0005] (1) Purpose of the utility model

[0006] In order to solve the technical problems existing in the background technology, the utility model proposes an extrusion die for round tube aluminum profiles that can avoid welding lines. By setting a diversion hole with an overall fan shape and an aspect ratio of 4:3, a feed surface that starts from the diversion hole and mills straight downward to the top of the lower blank knife, and the setting of the chamfered surface, the aluminum flow can be effectively guided and evenly distributed in the upper mold, and the flow is smooth and stable. The lower blank knife of not less than 1mm can provide a smooth transition surface for the aluminum flow, ensuring that the aluminum flow can be kept smooth and stable and continuously fed to the mold cavity, effectively avoiding the appearance of welding lines on the surface of the round tube aluminum profile during welding due to the turbulent flow and uneven distribution of the aluminum flow, thereby greatly improving the production quality of the profile.

[0007] (2) Technical solution

[0008] In order to achieve the above-mentioned object, the utility model provides the following technical solutions: a round tube aluminum profile extrusion die capable of avoiding weld lines, comprising a die body, the die body comprising;

[0009] An upper die is provided with a diverter bridge inside the upper die. The diverter bridge is arranged in a herringbone shape to separate three diverter holes from the upper die. The three diverter holes are all arranged in a fan shape. A lower hollow knife and a foreman connected to the bottom of the lower hollow knife are provided at the bottom of the diverter bridge.

[0010] The lower mold is arranged at the bottom of the upper mold, and a welding chamber is opened on the top thereof, and a cavity is also opened at the bottom of the welding chamber for inserting the molding components to produce round tube aluminum profiles;

[0011] Among them, the aspect ratio of the diversion hole is set to 4:3, and a chamfered surface is provided on the short side of the diversion hole. The diversion hole is milled straight downward from the feed surface to the top of the lower hollow knife, and the depth of the lower hollow knife is not less than 1 mm.

[0012] Preferably, the fillet of the chamfered surface is set to 40 degrees.

[0013] Preferably, the width of the diverter bridge is set to 1-3 mm, and the upper mold span is set to .- times the width of the diverter bridge.

[0014] Preferably, the upper surface of the welding chamber is flush with the span of the upper mold.

[0015] Preferably, the foreman is set to be circular, and after being inserted into the cavity, a forming gap can be formed between the foreman and the inner wall of the lower die located at the cavity, so as to be used for the extrusion production of round tube aluminum profiles.

[0016] Preferably, the lower die is further provided with a discharge hole at the bottom of the cavity, the inner diameter of the top of the discharge hole is smaller than the inner diameter of the bottom thereof, and is used for extruding and discharging round tube aluminum profiles.

[0017] Preferably, the upper mold and the lower mold are tightly fitted with each other through locking parts to form a mold body.

[0018] Compared with the prior art, the beneficial effects of the above technical solution of the utility model are:

[0019] The utility model provides a diversion hole which is fan-shaped as a whole and has an aspect ratio of 4:3, and is milled straight downward from the feed surface to the top of the lower hollow knife, and the chamfered surface is provided, so that the aluminum flow can be effectively guided and enter the upper mold smoothly and orderly, ensuring that the aluminum flow flows quickly and evenly, and the flow process is smooth and stable. The lower hollow knife of not less than 1mm can provide a smooth transition surface for the aluminum flow, ensuring that the aluminum flow remains smooth and stable when flowing out through the diversion hole, and continuously supplies material to the cavity, effectively avoiding the appearance of welding lines on the surface of round tube aluminum profiles due to the disordered flow and uneven distribution of the aluminum flow during welding, thereby greatly improving the production quality of the profiles. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0021] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0022] Figure 2 A half-section view of the utility model;

[0023] Figure 3 It is a cross-sectional view of the utility model;

[0024] Figure 4 It is a three-dimensional diagram of the utility model;

[0025] Figure 5 It is a top view of the upper mold of the utility model.

[0026] Description of reference numerals:

[0027] 1 mold body, 2 upper mold, 21 diverter bridge, 22 diverter hole, 23 lower blanking knife, 24 foreman, 25 chamfered surface;

[0028] 3 lower die, 31 welding chamber, 32 cavity, 33 discharge hole. DETAILED DESCRIPTION

[0029] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0030] The utility model provides Figure 1-5 The extrusion die for a round tube aluminum profile capable of avoiding welding lines comprises a die body 1, wherein the die body 1 comprises:

[0031] The upper die 2 has a diverter bridge 21 installed inside the upper die 2. The diverter bridge 21 is arranged in a herringbone shape to separate the upper die 2 into three diverter holes 22. The three diverter holes 22 are all arranged in a fan shape. A lower hollow knife 23 and a foreman 24 connected to the bottom of the lower hollow knife 23 are provided at the bottom of the diverter bridge 21.

[0032] The lower mold 3 is arranged at the bottom of the upper mold 2, and a welding chamber 31 is opened on the top thereof, and a cavity 32 is opened at the bottom of the welding chamber 31 for inserting the molding components to produce the round tube aluminum profile;

[0033] The aspect ratio of the diverter hole 22 is set to 4:3, and a chamfered surface 25 is provided on the short side of the diverter hole 22. The diverter hole 22 is milled straight downward from the feed surface to the top of the lower hollow knife 23, and the depth of the lower hollow knife 23 is not less than 1 mm.

[0034] In one embodiment, the radius of the chamfered surface 25 is set to 40 degrees, so that the aluminum flow can flow downward smoothly, reducing collisions between aluminum flows, and making the aluminum flow relatively stable.

[0035] In one embodiment, the width of the diverter bridge 21 is set to 1-3 mm, and the span of the upper mold 2 is set to 1.5-2 times the width of the diverter bridge 21, which ensures the strength of the upper mold 2, makes the mold more stable and durable, and improves its service life.

[0036] In one embodiment, the upper surface of the welding chamber 31 is flush with the span of the upper mold 2, which can ensure the assembly accuracy of the mold body 1 when assembling the upper mold 2 and the lower mold 3, thereby ensuring the stability and accuracy of the mold body 1 during operation.

[0037] In one embodiment, the foreman 24 is set to be circular, and after being inserted into the cavity 32, a forming gap can be formed between it and the inner wall of the lower mold 3 located at the cavity 32, which is used for the extrusion production of round tube aluminum profiles. The lower mold 3 is located at the bottom of the cavity 32 and is also provided with a discharge hole 33. The inner diameter of the top of the discharge hole 33 is smaller than the inner diameter of the bottom, which is used for the extrusion and discharge of round tube aluminum profiles, and ensures that the round tube aluminum profiles are not affected by the inner wall of the lower mold 3 during discharge, ensuring that their outer surface is smooth and flat.

[0038] In one embodiment, the upper mold 2 and the lower mold 3 are tightly fitted with each other through locking parts to assemble the mold body 1, which is convenient for workers to assemble the mold body 1, and the locking parts are configured as pins or bolts to facilitate operation by workers.

[0039] The embodiment is specifically as follows: when the present invention is in use, the aluminum flow is evenly divided into three streams under the action of the diverter bridge 21 and enters the interior of the upper mold 2 through the diverter holes 22. The number of the feed holes is set to odd, and the overall fan-shaped feed holes can guide the aluminum flow to enter the upper mold 2 smoothly and orderly, so that the aluminum flow is evenly distributed inside the upper mold 2 and the pressure is balanced. The aspect ratio of the diverter holes 22 is set to 4:3, which provides a good flow path for the aluminum flow, effectively improving the flow of the aluminum flow and ensuring smooth and stable flow of the aluminum flow. The setting of the chamfered surface 25 allows the aluminum flow to flow downward smoothly, reducing collisions between aluminum flows, and further making the flow of the aluminum flow more stable and balanced.

[0040] The diverter hole 22 is milled straight downward from the feed surface to the top of the lower hollow cutter 23, allowing the aluminum flow to flow quickly, further reducing the collision of the aluminum flow in the upper die 2, and further ensuring smooth and uniform flow. The setting of the lower hollow cutter 23 of not less than 1 mm provides a smooth transition surface for the aluminum flow when it flows out of the diverter hole 22, ensuring smooth flow of the aluminum through the diverter hole 22 and keeping the aluminum flow uniform and stable.

[0041] Subsequently, the aluminum flows through the welding chamber 31 to the die cavity 32. Under the flow restriction of the foreman 24 and the die cavity 32, the aluminum is extruded into a round tube aluminum profile within the forming gap and finally discharged through the discharge hole 33, completing the extrusion production of the round tube aluminum profile. During the entire process, the aluminum flow can remain smooth and stable, and continuously feed the die cavity 32, thereby effectively avoiding the appearance of weld lines on the surface of the round tube aluminum profile due to the turbulent flow and uneven distribution of the aluminum flow during welding, greatly improving the profile qualification rate.

[0042] This embodiment specifically solves the problem in the prior art that when the extrusion die is used to produce round tube aluminum profiles, the flow of aluminum flow cannot be effectively improved, and uneven flow rate and uneven distribution often occur, resulting in insufficient surface welding of the round tube aluminum profiles during molding, resulting in welding lines, which seriously affects the production quality of the profiles.

[0043] The above description is merely illustrative of certain exemplary embodiments of the present invention. It goes without saying that those skilled in the art will be able to modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A round tube aluminum profile extrusion die capable of avoiding weld lines, characterized by: The mold body (1) comprises: An upper die (2), wherein a diverter bridge (21) is installed inside the upper die (2), and the diverter bridge (21) is arranged in a herringbone shape to separate three diverter holes (22) from the upper die (2), and the three diverter holes (22) are all arranged in a fan shape, and a lower hollow knife (23) and a foreman (24) connected to the bottom of the lower hollow knife (23) are arranged at the bottom of the diverter bridge (21); The lower mold (3) is arranged at the bottom of the upper mold (2), and a welding chamber (31) is provided on the top thereof, and a cavity (32) is also provided at the bottom of the welding chamber (31) for inserting the molding component to produce a round tube aluminum profile; The aspect ratio of the diverter hole (22) is set to 4:3, and a chamfered surface (25) is provided on the short side of the diverter hole (22). The diverter hole (22) is milled straight downward from the feed surface to the top of the lower hollow knife (23), and the depth of the lower hollow knife (23) is not less than 1 mm.

2. The round tube aluminum profile extrusion die capable of avoiding weld lines according to claim 1, characterized in that: The fillet of the chamfered surface (25) is set to 40 degrees.

3. The round tube aluminum profile extrusion die capable of avoiding weld lines according to claim 1, characterized in that: The width of the diverter bridge (21) is set to 1-3 mm, and the span of the upper mold (2) is set to 1.5-2 times the width of the diverter bridge (21).

4. The round tube aluminum profile extrusion die capable of avoiding weld lines according to claim 1, characterized in that: The upper surface of the welding chamber (31) is flush with the span of the upper mold (2).

5. The round tube aluminum profile extrusion die capable of avoiding weld lines according to claim 1, characterized in that: The foreman (24) is arranged in a circular shape and can form a forming gap between the foreman (24) and the inner wall of the lower die (3) located at the cavity (32) after being inserted into the cavity (32), and is used for the extrusion production of round tube aluminum profiles.

6. The round tube aluminum profile extrusion die capable of avoiding weld lines according to claim 1, characterized in that: The lower die (3) is provided with a discharge hole (33) at the bottom of the cavity (32). The inner diameter of the top of the discharge hole (33) is smaller than the inner diameter of the bottom thereof, and is used for extruding and discharging round tube-type aluminum profiles.

7. The round tube aluminum profile extrusion die capable of avoiding weld lines according to claim 1, characterized in that: The upper die (2) and the lower die (3) are tightly fitted with each other via locking pieces and assembled into a die body (1).

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