High-precision automobile flat row part hot extrusion production die

Abstract

The utility model discloses a high-precision hot extrusion production die for automobile flat row parts. The high-precision hot extrusion production die comprises a die sleeve composed of a front die plate and a rear die plate, and a die body arranged in the die sleeve. According to the utility model, the extrusion ratio is improved by eliminating the application of a welding chamber and limiting the cross sections of the inlet and the outlet of the die sleeve hole, and meanwhile, the automobile flat row part can achieve an optimal extrusion effect when being extruded by arranging the fillet section, so that the production efficiency is improved. Therefore, full deformation of automobile flat row parts in the extrusion process is guaranteed, high production quality is achieved, further, an inclined face is additionally arranged at an inlet of the feeding hole, the flow of aluminum flow entering the feeding hole is increased, resistance borne by the aluminum flow in the flowing process can be reduced, and the service life of the aluminum flow is prolonged. The aluminum flow can uniformly and stably flow to a working belt, the size accuracy of the automobile flat row part is ensured, and the quality of a finished product is good.

Description

Technical Field

[0001] The utility model specifically relates to a hot extrusion production die for high-precision automotive flat strip parts. Background Art

[0002] In the aluminum extrusion processing industry, due to the low density, high strength, and good plasticity of aluminum alloy, it is widely used in technical fields such as construction, electric vehicles, ships, aerospace, etc. At present, with the rapid development of the new energy vehicle industry, hot extrusion dies play a crucial role in the manufacturing of new energy vehicle parts. Among them, profiles such as 1060 / 6101 flat strips (usually referring to a component used in the automotive exhaust system) are mainly produced using hot extrusion dies.

[0003] However, when the existing hot extrusion dies for automotive flat strip parts are in use, the extrusion ratio is relatively low, which will lead to insufficient deformation of the formed product and a decline in mechanical properties. Moreover, the traditional hot extrusion die has unstable control over the aluminum flow, resulting in less than ideal dimensional accuracy of the formed automotive flat strip parts, with deviations, affecting their use.

[0004] Therefore, it is necessary to invent a high-precision hot extrusion production die for automotive flat strip parts 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 high-precision hot extrusion production die for automotive flat strip parts. By canceling the application of the welding chamber and restricting the cross-sections of the inlet and outlet of the die sleeve holes (-), the extrusion ratio is increased. At the same time, by setting a rounded corner section, the automotive flat strip parts can achieve an optimal extrusion effect during extrusion, thereby ensuring sufficient deformation of the automotive flat strip parts during the extrusion process and having high production quality. Further, by adding an inclined surface at the inlet of the feed hole, not only the flow rate of the aluminum flow entering the feed hole is increased, but also the resistance suffered by the aluminum flow during flow is reduced, enabling the aluminum flow to flow uniformly and stably towards the working belt, ensuring the dimensional accuracy of the automotive flat strip parts and good finished product quality.

[0007] (II) Technical Solution

[0008] To achieve the above purpose, the utility model provides the following technical solution: A high-precision hot extrusion production die for automotive flat strip parts,

[0009] comprising a die sleeve composed of a front template and a rear template, and a die body disposed inside the die sleeve;

[0010] The front template includes holes, which are opened on the feeding surface of the front template for the aluminum flow to flow in;

[0011] The front template further includes a receiving groove, which is opened on the discharging surface of the front template and is communicated with the holes for receiving the mold body;

[0012] A feeding hole communicated with the holes is opened in the middle of the feeding surface of the mold body. An inclined surface is arranged at the entrance of the feeding hole, and a working belt connected with the inclined surface is arranged inside the feeding hole for the extrusion molding of automotive flat strip parts;

[0013] An empty cutter aligned with the outlet of the working belt is further opened inside the mold body, and a discharging hole communicated with the empty cutter is opened on the side wall of the rear template for the extrusion of automotive flat strip parts.

[0014] Preferably, both the front template and the rear template are set to be square, and the feeding surface of the front template is set to be an arc surface, and a slope section with an inclination of 20° is arranged at the top.

[0015] Preferably, the holes are set to be square holes, and the cross-sectional area of the entrance of the holes is 20 square millimeters, and the cross-sectional area of the outlet is 70 square millimeters.

[0016] Preferably, the periphery of the feeding surface of the mold body is chamfered, and the chamfer radius is greater than 2.0 mm.

[0017] Preferably, the inclined surface has an oblique angle of 0.5 * 45 degrees.

[0018] Preferably, the inner wall of the empty cutter inclines from the working belt to the discharging surface of the mold body, and the inclination angle is set to be 6 - 10 degrees.

[0019] Preferably, a rounded corner section is further arranged at the connection between the working belt and the empty cutter, and the rounded corner radius is greater than 2.0 mm.

[0020] Compared with the prior art, the beneficial effects of the above technical solutions of the present utility model are as follows:

[0021] 1. By canceling the application of the welding chamber, the mold body of the present utility model can be connected for extrusion to produce automotive flat strip parts. By restricting the cross-sections of the entrance and outlet of the holes in the mold sleeve, the extrusion ratio is increased. At the same time, by arranging the rounded corner section, the automotive flat strip parts can achieve an optimal extrusion effect during extrusion, ensuring that the automotive flat strip parts are fully deformed during extrusion and ensuring that their mechanical properties after molding are not affected, with high production quality;

[0022] 2. By adding an inclined surface at the entrance of the feeding hole, the utility model not only increases the flow rate of the aluminum flow into the feeding hole, but also reduces the resistance suffered by the aluminum flow during flowing, enabling the aluminum flow to flow uniformly and stably towards the working belt, reducing the influence of the unstable aluminum flow on the dimensions of the automotive flat row parts, reducing dimensional deviation, ensuring its accuracy, reliability, and further ensuring the finished product quality of the automotive flat row parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] 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 based on these drawings.

[0024] Figure 1 It is a schematic diagram of the overall structure of the present utility model;

[0025] Figure 2 It is a cross-sectional view of the mold body of the present utility model;

[0026] Figure 3 It is a schematic diagram of the mold sleeve structure of the present utility model.

[0027] Description of the reference numerals:

[0028] 1 mold sleeve, 11 front template, 11-1 hole, 11-2 receiving groove;

[0029] 12 rear template, 12-1 discharge hole;

[0030] 2 mold body, 21 feeding hole, 22 inclined surface, 23 working belt, 24 relief, 25 rounded corner section. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0031] In order to enable those skilled in the art to better understand the technical solutions of the present utility model, the following will further introduce the present utility model in detail with reference to the drawings.

[0032] The present utility model provides a hot extrusion production mold for high-precision automotive flat row parts as Figures 1-3 shown, including a mold sleeve 1 composed of a front template 11 and a rear template 12, and a mold body 2 disposed inside the mold sleeve 1;

[0033] The front template 11 includes a hole 11-1, which is opened on the feeding surface of the front template 11 for the aluminum flow to flow in;

[0034] The front template 11 further includes a receiving groove 11-2, which is opened on the discharging surface of the front template 11 and is communicated with the hole 11-1 for receiving the mold body 2;

[0035] In the mold body 2, a feed hole 21 communicating with the hole 11-1 is provided in the middle of the feed surface. An inclined surface 22 is provided at the entrance of the feed hole 21, and a working belt 23 connected to the inclined surface 22 is arranged inside the feed hole 21 for the extrusion molding of automotive flat row parts.

[0036] An empty knife 24 aligned with the outlet of the working belt 23 is further provided inside the mold body 2, and a discharge hole 12-1 communicating with the empty knife 24 is provided on the side wall of the rear template 12 for the extrusion of automotive flat row parts.

[0037] In one embodiment, both the front template 11 and the rear template 12 are square, and the circular mold body 2 is embedded in the square mold sleeve 1, so that the mold body 2 is uniformly stressed during use, ensuring stability during use, and the pressure from the external extruder is also relieved. The feed surface of the front template 11 is an arc surface, and a slope section with an inclination of 20° is provided at the top, improving the feeding efficiency of the aluminum rod and facilitating the installation of the mold sleeve 1.

[0038] In one embodiment, the hole 11-1 is a square hole, and the cross-sectional area of the entrance of the hole 11-1 is 20 square millimeters, and the cross-sectional area of the exit is 70 square millimeters, which can better control the flow of the aluminum flow. At the same time, the ratio of the cross-sectional areas of the entrance and the exit indirectly makes the mold body 2 have a higher extrusion ratio, resulting in a higher degree of deformation of the automotive flat row parts and improving their mechanical properties.

[0039] In one embodiment, the periphery of the feed surface of the mold body 2 is chamfered, and the chamfer radius is greater than 2.0 mm, ensuring the smoothness and dimensional accuracy of the mold body 2 and facilitating the installation and use of the mold body 2.

[0040] In one embodiment, the inclined surface 22 has a 0.5*45-degree bevel angle, so that the aluminum flow can smoothly flow into the feed hole 21, reducing the resistance of the aluminum flow during the flow process and making the flow rate of the aluminum flow uniform and stable.

[0041] In one embodiment, the inner wall of the empty knife 24 inclines from the working belt 23 to the discharge surface of the mold body 2, and the inclination angle is set to 6-10 degrees, improving the discharge efficiency of the automotive flat row parts and ensuring the quality of the automotive flat row parts during discharge, thereby improving the production quality of the automotive flat row parts.

[0042] In one embodiment, a rounded corner section 25 is further provided at the connection between the working belt 23 and the empty knife 24, and the rounded corner radius is greater than 2.0 mm, reducing the resistance suffered by the automotive flat row parts when leaving the working belt 23 and reducing the wear of the automotive flat row parts.

[0043] The specific implementation method is as follows: When the present utility model is in use, the mold body 2 is embedded in the receiving groove 11-2 of the front template 11, and then the front template 11 and the rear template 12 are assembled into a mold sleeve 1 through fasteners for use with the mold body 2. Specifically:

[0044] Extrusion is carried out using an aluminum rod with a diameter of 18 mm and a length of 300 mm. During the extrusion process, the aluminum flow can continuously flow into the feed hole 21, enabling the mold body 2 to be connected for extrusion production of automotive flat strip parts. At the same time, the application of the welding chamber is cancelled on the feed surface of the mold body 2. That is, based on the principle that the backward extrusion specific pressure is greater than the forward extrusion, the aluminum flow can directly flow into the feed hole 21 and act on the working belt 23, indirectly increasing the extrusion ratio, thereby reducing the extrusion force required for the aluminum rod, greatly improving the extrusion speed, and ensuring the stability of the aluminum flow during extrusion, laying a foundation for the smooth flow of the aluminum flow into the feed hole 21;

[0045] At the same time, by setting an inclined surface 22 at the entrance of the hole 11-1, the opening of the feed surface of the feed hole 21 is increased, ensuring sufficient aluminum flow in the feed hole 21. At the same time, the inclined surface 22 can also reduce the resistance when the aluminum flow enters the feed hole 21, enabling the aluminum flow to flow evenly and stably into the feed hole 21 through the hole 11-1, and indirectly reducing the extrusion force required for the aluminum rod, thereby reducing the influence of unstable aluminum flow on the dimensions of automotive flat strip parts, reducing dimensional deviation, and ensuring accurate and reliable precision;

[0046] When the aluminum flow forms automotive flat strip parts at the working belt 23, the setting of the rounded corner section 25 enables the automotive flat strip parts to achieve an optimal extrusion effect during extrusion, thereby reducing the wear of the automotive flat strip parts and avoiding surface damage to the automotive flat strip parts. Then, the automotive flat strip parts will enter the relief groove 24, and the inner wall of the relief groove 24 with an inclined shape can reduce the resistance when the automotive flat strip parts pass through the working belt 23 and the rounded corner section 25, enabling them to be smoothly extruded and finally discharged through the discharge hole 12-1 to complete the production;

[0047] This implementation method specifically solves the problems in the prior art that when the existing hot extrusion die for automotive flat strip parts is in use, the extrusion ratio is relatively low, which will result in insufficient deformation of the formed product and a decline in mechanical properties, and the traditional hot extrusion die has unstable control over the aluminum flow, resulting in unsatisfactory dimensional accuracy of the formed automotive flat strip parts, with deviations, affecting the use.

[0048] Only some exemplary embodiments of the present utility model have been described by way of illustration. Without doubt, for those of ordinary skill in the art, the described embodiments can be modified in various different ways without departing from the spirit and scope of the present utility model. 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 utility model.

Claims

1. A high-precision hot extrusion production die for flat-plate parts of automobiles, characterized by: It comprises a mold sleeve (1) composed of a front mold plate (11) and a rear mold plate (12), and a mold body (2) arranged inside the mold sleeve (1); The front template (11) comprises a hole (11-1) which is opened on the feed surface of the front template (11) and is used for aluminum flow to flow in; The front template (11) further comprises a receiving groove (11-2), which is disposed on the discharge surface of the front template (11) and is connected to the hole (11-1) and is used to receive the mold body (2); A feed hole (21) connected to the hole (11-1) is provided in the middle of the feed surface of the mold body (2); an inclined surface (22) is provided at the entrance of the feed hole (21); and a working belt (23) connected to the inclined surface (22) is provided inside the feed hole (21) for extrusion molding of flat-plate parts of automobiles; The mold body (2) is also provided with an empty knife (24) aligned with the outlet of the working belt (23), and the side wall of the rear mold plate (12) is provided with a discharge hole (12-1) connected to the empty knife (24) for extruding flat-plate parts for automobiles.

2. The high-precision hot extrusion production die for automobile flat parts according to claim 1, characterized in that: The front template (11) and the rear template (12) are both arranged in a square shape, and the material feeding surface of the front template (11) is arranged in an arc-shaped surface, with a slope section having an inclination of 20° arranged on the top.

3. The high-precision hot extrusion production die for automobile flat parts according to claim 1, characterized in that: The hole (11-1) is configured as a square hole, and the inlet cross-sectional area of ​​the hole (11-1) is 20 square millimeters, and the outlet cross-sectional area is 70 square millimeters.

4. The high-precision hot extrusion production die for automobile flat parts according to claim 1, characterized in that: The feed surface of the mold body (2) is chamfered at its periphery, and the chamfer radius is greater than 2.0 mm.

5. The high-precision hot extrusion production die for automobile flat parts according to claim 1, characterized in that: The inclined surface (22) has an angle of 0.5*45 degrees.

6. The high-precision hot extrusion production die for automobile flat parts according to claim 1, characterized in that: The inner wall of the empty knife (24) is inclined from the working belt (23) to the discharge surface of the mold body (2), and the inclination angle is set to 6-10 degrees.

7. The high-precision hot extrusion production die for automobile flat parts according to claim 1, characterized in that: A fillet section (25) is also provided at the connection between the working belt (23) and the idle knife (24), and the fillet radius is greater than 2.0 mm.

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