Aluminum profile hot extrusion die capable of reducing coarse grain formation

Abstract

The utility model discloses an aluminum profile hot extrusion die capable of reducing coarse grain formation, which comprises a die body, the die body comprises a die plate, the top of the die plate is provided with a welding chamber, the joint of the bottom wall and the side wall of the welding chamber is provided with an R angle surface and two working belts, and the two working belts are distributed in the welding chamber in parallel. The two working belt inlets are used for extrusion forming of aluminum profiles, and inclined faces are arranged at the two working belt inlets. According to the utility model, more aluminum flows can be accommodated by arranging the deeper welding chamber, the aluminum flows can smoothly and uniformly flow into the working tape due to the arrangement of the R-angle surface, and meanwhile, the aluminum flows can be guided to quickly and stably enter the working tape due to the arrangement of the inclined surface, so that the resistance to the aluminum flows is reduced, the stress concentration is avoided, the aluminum flows in the working tape are uniform and stable, and the service life of the working tape is prolonged. And the corresponding temperature difference is small, so that the coarse grain phenomenon is avoided, and the finished product quality of the aluminum profile is effectively improved.

Description

Technical Field

[0001] The utility model specifically relates to a hot extrusion die for aluminum profiles that can reduce the formation of coarse grains. Background Art

[0002] In the aluminum extrusion processing industry, due to the low density, high strength, good plasticity of aluminum alloy, it has 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 usually uses dies to complete the production by hot extrusion at high temperatures. Different aluminum profiles have corresponding hot extrusion dies to achieve the production of different profiles.

[0003] In the existing aluminum profile extrusion dies, the flow state of the aluminum flow near the working belt is difficult to be stable, which easily causes local stress concentration and temperature difference. This will lead to the formation of many grains around the aluminum profile, that is, the phenomenon of coarse grains occurs, seriously affecting the finished product quality of the aluminum profile and urgently needing improvement.

[0004] Therefore, it is necessary to invent a hot extrusion die for aluminum profiles that can reduce the formation of coarse grains to solve the above problems. Content of the Utility Model

[0005] (I) Purpose of the Utility Model

[0006] To solve the technical problems in the background art, the utility model proposes a hot extrusion die for aluminum profiles that can reduce the formation of coarse grains. By setting a deeper welding chamber that can accommodate more aluminum flow, and the setting of the R - angle surface, the aluminum flow can flow smoothly and evenly into the working belt. At the same time, the setting of the inclined surface can guide the aluminum flow to quickly and stably enter the inside of the working belt, reduce the resistance received by the aluminum flow, avoid stress concentration, the aluminum flow in the working belt is uniform and stable, and the corresponding temperature difference will also be smaller, thus avoiding the generation of the coarse grain phenomenon and effectively improving the finished product quality of the aluminum profile.

[0007] (II) Technical Solution

[0008] To achieve the above purpose, the utility model provides the following technical solution: A hot extrusion die for aluminum profiles that can reduce the formation of coarse grains, including a die body, the die body includes a template, a welding chamber is opened at the top of the template, and an R - angle surface is provided at the connection of the bottom wall and the side wall of the welding chamber;

[0009] Working belts, the number of the working belts is two, and they are arranged side by side inside the welding chamber for the extrusion forming of aluminum profiles. Inclined surfaces are provided at the entrances of both working belts;

[0010] The deflector is installed at the bottom of the template, and two discharge holes are provided on its top surface for discharging the formed aluminum profiles.

[0011] Preferably, the depth of the welding chamber is set to 5-10 mm.

[0012] Preferably, the radius of the R-angle surface is at least set to mm.

[0013] Preferably, the angle of the inclined surface is set to - degrees.

[0014] Preferably, two primary relief slots are further provided inside the template, which are respectively aligned with the outlets of the working belt, and the cross-sectional area of the primary relief slots is larger than that of the working belt.

[0015] Preferably, two secondary relief slots are provided at the bottom of the template, which are connected to the primary relief slots, and the inner walls of the secondary relief slots are inclined outward.

[0016] Preferably, the two discharge holes are respectively aligned with the outlets of the two secondary relief slots, and the cross-sectional area of the discharge holes is larger than that at the outlets of the secondary relief slots.

[0017] Preferably, the template and the deflector are made of S136 die steel.

[0018] Compared with the prior art, the beneficial effects of the above technical solutions of the present utility model are as follows:

[0019] When the present utility model is in use, a deeper welding chamber is provided to accommodate more aluminum flow. The setting of the R-angle surface enables the aluminum flow to flow smoothly and evenly into the working belt, thereby reducing the pressure on the aluminum flow and avoiding stress concentration on the die body. This promotes the stable flow velocity and uniform distribution of the aluminum flow in the welding chamber, reduces the probability of coarse grains appearing, and the setting of the inclined surface can guide the aluminum flow to quickly and stably enter the working belt, reducing the resistance on the aluminum flow and avoiding stress concentration again. The aluminum flow in the working belt is uniform and stable, and the corresponding temperature difference is also small, so that the periphery of the aluminum profile formed by flowing out of the working belt is relatively flat, the surface is neat, avoiding the generation of coarse grain phenomenon, and effectively improving the finished product quality of the aluminum profile. Description of the Drawings

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present utility model. For those of ordinary skill in the art, other drawings can also be obtained according to these drawings.

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

[0022] Figure 2 Cross-sectional view of the template of the present utility model;

[0023] Figure 3 Exploded view of the present utility model;

[0024] Figure 4 Schematic diagram of the inclined surface of the present utility model.

[0025] Explanation of reference numerals:

[0026] 1 Die body;

[0027] 100 Template, 101 Welding chamber, 102 R corner surface, 103 Working belt, 104 Inclined surface, 105 First-stage relief, 106 Second-stage relief;

[0028] 200 Deflector plate, 201 Discharge hole. Detailed implementation manners

[0029] In order to enable those skilled in the art to better understand the technical solutions of the present utility model, the present utility model will be further introduced in detail below in conjunction with the accompanying drawings.

[0030] The present utility model provides an aluminum profile hot extrusion die capable of reducing the formation of coarse grains as shown in Figures 1-4 Figure, which includes a die body 1. The die body 1 includes a template 100. A welding chamber 101 is opened at the top of the template 100, and an R corner surface 102 is provided at the connection between the bottom wall and the side wall of the welding chamber 101;

[0031] Working belts 103. The number of the working belts 103 is two, and they are arranged side by side inside the welding chamber 101 for the extrusion forming of aluminum profiles. Inclined surfaces 104 are provided at the inlets of the two working belts 103;

[0032] Deflector plate 200. The deflector plate 200 is installed at the bottom of the template 100, and two discharge holes 201 are opened on the top surface thereof for discharging the formed aluminum profiles.

[0033] In one embodiment, the depth of the welding chamber 101 is set to 5 - 10 mm, which ensures that the aluminum flow in the welding chamber 101 is sufficient, and further ensures that the aluminum flow entering the working belt 103 is sufficient and the flow rate is stable. The radius of the R corner surface 102 is at least set to 5 mm, so that the aluminum flow can smoothly transition to the inlet of the working belt 103, which can avoid stress concentration in the die body 1 and prevent cracks from occurring during use, indirectly ensuring the stability of the aluminum flow and preventing the occurrence of coarse grain phenomena. The angle of the inclined surface 104 is set to be 15 - 30 degrees, so that the aluminum flow can quickly flow into the working belt 103 and reduce the resistance when the aluminum flow enters the working belt 103, enabling the aluminum flow to maintain a uniform flow rate.

[0034] In one embodiment, two primary relief slots 105 respectively aligned with the outlet of the working belt 103 are further provided inside the template 100, and two secondary relief slots 106 communicating with the primary relief slots 105 are provided at the bottom of the template 100 to reduce the resistance during the forming of the aluminum profile. The cross-sectional area of the primary relief slots 105 is larger than that of the working belt 103. The inner wall of the secondary relief slots 106 is inclined outward. The two discharge holes 201 are respectively aligned with the outlets of the two secondary relief slots 106, and the cross-sectional area of the discharge holes 201 is larger than that of the outlets of the secondary relief slots 106, which helps the aluminum profile to be smoothly discharged after forming.

[0035] In one embodiment, the template 100 and the flow guide plate 200 are made of S136 die steel. S136 die steel has excellent wear resistance, can reduce the adhesion degree of aluminum alloy, indirectly reduce the generation of coarse grains, and the hardness of S136 die steel can reach 48 - 52 HRC, with excellent tensile strength, can adapt to the production and manufacturing of aluminum alloy, and has a long service life. Among them, the template 100 and the flow guide plate 200 are tightly assembled into a die body 1 through locking parts, so that the die body 1 can be quickly assembled and is convenient to use.

[0036] The specific implementation method is as follows: When the present utility model is in use, the type of the extruder can be selected in advance so that the extrusion ratio is between 30 and 60, so that the aluminum rod can be fully deformed during extrusion, obtain good mechanical properties and surface quality, achieve the best extrusion effect, and carry out a certain prior prevention of coarse grains;

[0037] During the extrusion process of the aluminum rod, the bonding chamber 101 with a depth of 5 - 10 mm can ensure the welding quality while making the pressure on the aluminum flow smaller, and at the same time ensure that there is enough aluminum flow flowing to the inlet of the working belt 103. And the setting of the R - angle surface 102 enables the aluminum flow to smoothly transition during the process of flowing to the working belt 103, reduces the impact on the aluminum flow, and also avoids stress concentration. Furthermore, it promotes the stable flow velocity and uniform distribution of the aluminum flow in the bonding chamber 101, and reduces the probability of the appearance of coarse grains;

[0038] At the same time, the inclined surface 104 at the inlet of the working belt 103 can guide the aluminum flow to quickly and stably enter the inside of the working belt 103, and the setting of the inclined surface 104 can also reduce the resistance of the aluminum flow at the working belt 103, avoid stress concentration, make the aluminum flow in the working belt 103 flow evenly and smoothly, the temperature difference between the aluminum flows is small, make the periphery of the aluminum profile formed by flowing out of the working belt 103 relatively flat and the surface neat, and avoid the generation of coarse grain phenomenon. The formed aluminum profile is then extruded through the discharge holes 201, thus completing the hot extrusion production of the aluminum profile and effectively improving the finished product quality of the aluminum profile;

[0039] Moreover, by providing two working belts 103 and two discharge holes 201 corresponding to the working belts 103, the die body 1 can achieve two outputs in one mold. When avoiding the coarse crystal phenomenon of aluminum profiles, the output of aluminum profiles per unit time is increased, and the production cost is reduced.

[0040] This embodiment specifically solves the problem that in the prior art, in the aluminum profile extrusion die, the flow state of the aluminum flow near the working belt 103 is difficult to be stable, which easily causes local stress concentration and temperature difference. This will lead to the formation of many grains around the aluminum profile, that is, the coarse crystal phenomenon occurs, seriously affecting the finished product quality of the aluminum profile and urgently needing improvement.

[0041] Only some exemplary embodiments of the present invention have been described by way of illustration. Undoubtedly, for those of ordinary skill in the art, without departing from the spirit and scope of the present invention, the described embodiments can be modified in various different ways. Therefore, the above drawings and descriptions 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 hot extrusion die for aluminum profiles that can reduce the formation of coarse grains, characterized in that: It includes a die body (1), and the die body (1) includes: A template (100) with a welding chamber (101) opened at the top thereof, and an R-angle surface (102) is provided at the connection between the bottom wall and the side wall of the welding chamber (101); Two working belts (103), the number of the working belts (103) is two, and they are arranged side by side inside the welding chamber (101) for extrusion forming of aluminum profiles. Inclined surfaces (104) are provided at the inlets of the two working belts (103); A flow guide plate (200) is installed at the bottom of the template (100), and two discharge holes (201) are opened on the top surface thereof for discharging the formed aluminum profiles.

2. The hot extrusion die for aluminum profiles capable of reducing the formation of coarse grains according to claim 1, wherein: The depth of the welding chamber (101) is set to 5-10 mm.

3. A hot extrusion die for aluminum profiles capable of reducing the formation of coarse grains according to claim 1, characterized in that: The radius of the R-angle surface (102) is at least set to 5 mm.

4. A hot extrusion die for aluminum profiles capable of reducing the formation of coarse grains according to claim 1, characterized in that: The angle of the inclined surface (104) is set to 15-30 degrees.

5. A hot extrusion die for aluminum profiles capable of reducing the formation of coarse grains according to claim 1, characterized in that: Two first-stage relief grooves (105) respectively aligned with the outlets of the working belts (103) are further opened inside the template (100), and the cross-sectional area of the first-stage relief grooves (105) is larger than the cross-sectional area of the working belts (103).

6. A hot extrusion die for aluminum profiles capable of reducing the formation of coarse grains according to claim 5, characterized in that: Two second-stage relief grooves (106) communicating with the first-stage relief grooves (105) are opened at the bottom of the template (100), and the inner walls of the second-stage relief grooves (106) are inclined outward.

7. An aluminum profile hot extrusion die capable of reducing the formation of coarse grains according to claim 6, characterized in that: The two discharge holes (201) are respectively aligned with the outlets of the two second-stage relief grooves (106), and the cross-sectional area of the discharge holes (201) is larger than the cross-sectional area at the outlets of the second-stage relief grooves (106).

8. A hot extrusion die for aluminum profiles capable of reducing the formation of coarse grains according to claim 1, characterized in that: The template (100) and the flow guide plate (200) are made of S136 die steel.

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