Forming device for producing and processing copper-aluminum composite material

Abstract

The utility model relates to the technical field of production and processing of copper-aluminum materials, and discloses a forming device for production and processing of copper-aluminum composite materials, which realizes layered heating and multi-stage compression by arranging structures such as a heating device, a copper metal runner, an aluminum metal runner and a fork pipe, and conveys copper materials and aluminum materials into the copper metal runner and the aluminum metal runner respectively. A copper material and an aluminum material are heated through inner rings of the high-frequency inductor and the medium-frequency inductor and then are output from the interiors of the copper metal runner and the aluminum metal runner to enter the shaping device, when the copper material and the aluminum material pass through the threaded strip, relative movement is carried out among metals, the shearing effect is generated, the shearing force enables the metal surface to generate plastic deformation, and an oxidation film is damaged; the metal surface is rough, metal combination can be promoted, the metal is gradually compressed by the conical section of the shaping device while passing through the threaded strip, interface atomic-scale contact between the metal is achieved through the shaping device, then a compact conforming structure is formed, and the effect of a layered guide runner is achieved.

Description

Technical Field

[0001] This utility model relates to the field of copper and aluminum material production and processing technology, and in particular to a molding device for the production and processing of copper and aluminum composite materials. Background Technology

[0002] Copper-aluminum composites are composite materials composed of two metallic materials: copper and aluminum. Their manufacturing process involves stacking copper and aluminum materials after special treatment, and then bonding the two materials tightly using a high-temperature, high-pressure process. Copper-aluminum composites possess unique physical and chemical properties and are widely used in various fields. Molding equipment is required during the production and processing of copper-aluminum composites.

[0003] In the existing technology, in the process of processing copper-aluminum composite materials into cables, due to the large differences in the physical properties of copper and aluminum, such as melting point, thermal conductivity, and ductility, traditional single-channel extrusion dies result in large differences in material flow rate and low cross-sectional bonding strength. Furthermore, because the optimal hot working temperature ranges of copper and aluminum are different, targeted heating is not possible. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a molding device for the production and processing of copper-aluminum composite materials, which has the advantages of composite flow channel mold and gradient heating channel, thus solving the problems mentioned in the background technology.

[0005] This utility model provides the following technical solution: a molding device for the production and processing of copper-aluminum composite materials, including a heating device, one end of which is fixedly connected to a shaping device, the heating device having copper and aluminum metal channels inside, the copper and aluminum metal channels being connected to the interior of the shaping device, a forked tube in the middle of the heating device, a portion of the shaping device being conical, and three spiral strips being uniformly arranged in a circular pattern inside the shaping device, the length of each spiral strip being only half the length of the conical portion of the shaping device.

[0006] With the above structural design, the copper and aluminum materials are heated and then introduced into the interior of the forming device. They move relative to each other along the spiral surface of the threaded strip and generate a shearing effect. The shearing effect can break the oxide film of the metal and make the metal surface rough, promoting the bonding between the metals and strengthening the interfacial bonding strength.

[0007] Preferably, the diameter of the copper metal flow channel is larger than that of the aluminum metal flow channel, the cross-sectional diameter of the copper metal flow channel is 1.2 to 1.5 times that of the aluminum metal flow channel, and the diameters of the copper metal flow channel and the aluminum metal flow channel gradually decrease.

[0008] The above structural design compensates for the difference in material plasticity by utilizing the cross-sectional difference between the copper and aluminum metal flow channels, thus avoiding interfacial tearing caused by asynchronous flow velocities.

[0009] Preferably, a heating groove is provided in the middle section of both the copper metal flow channel and the aluminum metal flow channel. A high-frequency sensor is fixedly sleeved inside the heating groove of the copper metal flow channel, and a medium-frequency sensor is fixedly sleeved inside the heating groove of the aluminum metal flow channel.

[0010] With the above structural setup, the high-frequency sensor and the low-frequency sensor can heat the copper and aluminum materials separately. Since the metal materials are different, the heating temperature is also different, so that they can be better fused after being heated separately.

[0011] Preferably, the high-frequency sensor is a high-frequency induction heating device with an operating frequency of 100kHz, and the medium-frequency sensor is a medium-frequency induction heating device with an operating frequency of 10kHz.

[0012] With the above structural design, the surface temperature of the copper material can reach 750℃-850℃, and the overall temperature of the aluminum material can reach 450℃-480℃, so that the copper metal flow channel and the aluminum metal flow channel can achieve a temperature difference control of at least 200℃.

[0013] Preferably, the fork tube is Y-shaped, and the fork tube is divided into two outlet tubes from the middle section, with the two outlet tubes located on the upper and lower sides between the aluminum metal flow channel and the fork tube, respectively.

[0014] With the above structural design, when the metal materials are heated and fused, nitrogen gas is ejected through the outlet, which rapidly reduces the metal interface temperature from 600°C to below 450°C, thus inhibiting the formation of intermetallic compounds.

[0015] Preferably, the maximum diameter of the conical section of the shaping device is three times the minimum diameter, and the diameter ratio of the two end faces of the conical section to the middle section is 1:2:3.

[0016] Through the above structural design, the conical middle section of the shaping device enables the copper and aluminum materials to make interfacial contact, and the conical tail end of the shaping device forms a dense composite structure between the copper and aluminum materials.

[0017] This utility model has the following advantages:

[0018] 1. This molding device for the production and processing of copper-aluminum composite materials achieves layered heating and multi-stage compression through the setting of heating devices, copper metal channels, aluminum metal channels, and forked tubes. Copper and aluminum materials are respectively transported into the copper and aluminum metal channels, where they are heated by the inner rings of high-frequency and medium-frequency inductors. They are then output from the copper and aluminum metal channels into the molding device, and then pass through the conical section and threaded strip of the molding device. When passing through the threaded strip, the metals move relative to each other and generate a shearing effect. The shearing force causes plastic deformation of the metal surface, destroys the oxide film, and roughens the metal surface, which can promote metal bonding. While passing through the threaded strip, the metals are gradually compressed by the conical section of the molding device. The molding device achieves atomic-level contact between the metals, and then forms a dense composite structure, which plays a role in the layered guiding flow channel.

[0019] 2. This molding device for the production and processing of copper-aluminum composite materials achieves material temperature control through structures such as high-frequency inductors, medium-frequency inductors, and forked tubes. Copper and aluminum materials are respectively conveyed into the copper metal flow channel and the aluminum metal flow channel, where they are heated by passing through the inner rings of the high-frequency and medium-frequency inductors. After passing through the high-frequency inductor, the surface temperature of the copper material can reach 750℃-850℃, and the overall temperature of the aluminum material can reach 450℃-490℃ after passing through the medium-frequency inductor. Subsequently, when the aluminum material is output from the copper and aluminum metal flow channels into the molding device, low-temperature nitrogen gas is sprayed out from the outlet of the forked tube, which rapidly reduces the metal interface temperature from about 600℃ to below 450℃, thereby inhibiting the formation of intermetallic compounds and achieving the effect of temperature control of the metal materials. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the internal structure of the heating device of this utility model;

[0022] Figure 3 This is a schematic diagram of the internal structure of the heating structure of this utility model from another perspective.

[0023] In the diagram: 1. Heating device; 11. Copper metal flow channel; 12. Aluminum metal flow channel; 13. Forked tube; 14. High-frequency inductor; 15. Medium-frequency inductor; 2. Shaping device; 21. Spiral strip. Detailed Implementation

[0024] 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.

[0025] Please see Figures 1-3 A molding device for producing and processing copper-aluminum composite materials includes a heating device 1, with a shaping device 2 fixedly connected to one end of the heating device 1. The heating device 1 has copper metal channels 11 and aluminum metal channels 12 inside, which are respectively connected to the interior of the shaping device 2. A forked tube 13 is provided in the middle of the heating device 1. A portion of the shaping device 2 is conical in shape. The interior of the shaping device 2 has three spiral strips 21 arranged in a circular pattern. The length of each spiral strip 21 is only half the length of the conical portion of the shaping device 2. After heating, the copper and aluminum materials move relative to each other between the spiral strips 21, generating a shearing effect. The shearing force causes micron-level plastic deformation on the copper and aluminum surfaces, destroying the oxide film. The rough surface formed by shearing promotes the bonding between the metal materials. Compared with structures without spirals, this structure improves the interfacial bonding strength.

[0026] In practical applications, copper and aluminum materials are placed into the copper flow channel 11 and aluminum flow channel 12 respectively and transported into the forming device 2. When the copper and aluminum materials pass through the middle section of the copper flow channel 11 and aluminum flow channel 12, they are heated by the high-frequency inductor 14 and the medium-frequency inductor 15 respectively. The high-frequency inductor 14 heats the surface of the copper material to between 750°C and 850°C, and the medium-frequency inductor 15 heats the aluminum material to about 450°C. After heating, they are introduced into the forming device 2 and follow the spiral surface of the spiral strip 21, causing the spiral strip 21 to drive the copper and aluminum materials to move relative to each other and generate a shearing effect. The shearing effect can break the oxide film of the metal and make the metal surface rough, promote the bonding between the metals, and strengthen the interfacial bonding strength.

[0027] Please see Figures 1-2 The diameter of the copper metal flow channel 11 is larger than that of the aluminum metal flow channel 12. The cross-sectional diameter of the copper metal flow channel 11 is 1.2 to 1.5 times that of the aluminum metal flow channel 12. This is to compensate for the high yield strength of copper. The diameters of the copper metal flow channel 11 and the aluminum metal flow channel 12 gradually decrease. The diameters of the copper metal flow channel 11 and the aluminum metal flow channel 12 are larger on the side of the heating device 1 away from the forming device 2, and smaller on the side of the heating device 1 close to the forming device 2.

[0028] The difference in cross-section between the copper metal channel 11 and the aluminum metal channel 12 compensates for the difference in material plasticity, avoiding interface tearing caused by asynchronous flow rates. By using different channels to heat and fuse different materials, the internal stress of the materials can be reduced.

[0029] Please see Figures 1-2 Heating tanks are provided in the middle sections of the copper metal flow channel 11 and the aluminum metal flow channel 12. A high-frequency sensor 14 is fixedly sleeved inside the heating tank of the copper metal flow channel 11, and a medium-frequency sensor 15 is fixedly sleeved inside the heating tank of the aluminum metal flow channel 12.

[0030] Please see Figures 1-2 The high-frequency inductor 14 is a high-frequency induction heating device with a high operating frequency of 100kHz. It uses a ring coil to heat the copper material, achieving rapid surface heating. The medium-frequency inductor 15 is a medium-frequency induction heating device with a relatively low operating frequency of 10kHz. By using a segmented inductive coil and the above heating device settings, the surface temperature of the copper material can reach 750℃-850℃, and the overall temperature of the aluminum material can reach 450℃-480℃, achieving a temperature difference control of at least 200℃ between the copper metal flow channel 11 and the aluminum metal flow channel 12.

[0031] Please see Figures 1-3 The maximum diameter of the conical section of the shaping device 2 is three times the minimum diameter. The diameter ratio of the two end faces of the conical section of the shaping device 2 to the diameter of the middle section is 1:2:3, which ensures sufficient plastic flow. The conical middle section of the shaping device 2 enables the copper and aluminum materials to make interfacial contact. The conical tail end of the shaping device 2 forms a dense composite structure between the copper and aluminum materials.

[0032] Please see Figures 1-3 The fork tube 13 is Y-shaped and splits into two outlet tubes from the middle. The two outlet tubes are located on the upper and lower sides between the aluminum metal flow channel 12 and the fork tube 13, respectively. The end of the fork tube 13 is connected to a nitrogen tank. Nitrogen is introduced into the fork tube 13. When the metal material is heated and fused, the nitrogen is sprayed out through the outlet tube, which rapidly reduces the metal interface temperature from 600°C to below 450°C, thus inhibiting the formation of intermetallic compounds.

[0033] Working Principle: In use, the fork pipe 13 is connected to the nitrogen tank. First, the high-frequency inductor 14 and the medium-frequency inductor 15 inside the heating tanks of the copper and aluminum flow channels 11 and 12 are activated to preheat them. Then, the copper and aluminum materials are respectively conveyed into the copper and aluminum flow channels 11 and 12, respectively, so that they are heated by passing through the inner rings of the high-frequency inductor 14 and the medium-frequency inductor 15. After passing through the high-frequency inductor 14, the surface temperature of the copper material can reach 750℃-850℃, and after passing through the medium-frequency inductor 15, the overall temperature of the aluminum material can reach 450℃-490℃. Finally, the materials are output from inside the copper and aluminum flow channels 11 and 12 into the shaping device. Inside the fork tube 13, low-temperature nitrogen gas is ejected from the outlet, rapidly reducing the metal interface temperature from around 600°C to below 450°C, which can inhibit the formation of intermetallic compounds. Subsequently, the metal passes through the conical section and spiral strip 21 of the shaping device 2. When passing through the spiral strip 21, the metals undergo relative movement and generate a shearing effect. The shearing force causes plastic deformation of the metal surface, destroys the oxide film, and roughens the metal surface, which can promote metal bonding. While passing through the spiral strip 21, the metals are gradually compressed by the conical section of the shaping device 2. The shaping device 2 enables atomic-level contact between the metals, which then forms a dense composite structure. Finally, the metals are output from the end of the shaping device 2. The end of the shaping device 2 has a certain length, which helps to suppress the springback deformation of the composite material.

Claims

1. A molding apparatus for producing and processing copper-aluminum composite materials, comprising a heating device (1), characterized in that: One end of the heating device (1) is fixedly connected to the shaping device (2). The heating device (1) has a copper metal flow channel (11) and an aluminum metal flow channel (12) inside. The copper metal flow channel (11) and the aluminum metal flow channel (12) are respectively connected to the inside of the shaping device (2). The heating device (1) has a forked tube (13) in the middle. A part of the shaping device (2) is conical. The inside of the shaping device (2) is uniformly provided with spiral strips (21) in a circular shape. There are three spiral strips (21). The length of the spiral strips (21) is only half the length of the conical part of the shaping device (2).

2. The molding apparatus for producing and processing copper-aluminum composite materials according to claim 1, characterized in that: The diameter of the copper metal flow channel (11) is larger than that of the aluminum metal flow channel (12), and the cross-sectional diameter of the copper metal flow channel (11) is 1.2 to 1.5 times that of the cross-sectional diameter of the aluminum metal flow channel (12). The diameters of the copper metal flow channel (11) and the aluminum metal flow channel (12) gradually decrease.

3. The molding apparatus for producing and processing copper-aluminum composite materials according to claim 2, characterized in that: Heating grooves are provided in the middle sections of the copper metal flow channel (11) and the aluminum metal flow channel (12). A high-frequency sensor (14) is fixedly sleeved inside the heating groove of the copper metal flow channel (11), and a medium-frequency sensor (15) is fixedly sleeved inside the heating groove of the aluminum metal flow channel (12).

4. The molding apparatus for producing and processing copper-aluminum composite materials according to claim 3, characterized in that: The high-frequency sensor (14) is a high-frequency induction heating device with a working frequency of 100kHz. The medium-frequency sensor (15) is a medium-frequency induction heating device with a working frequency of 10kHz.

5. The molding apparatus for producing and processing copper-aluminum composite materials according to claim 4, characterized in that: The fork tube (13) is Y-shaped in general. The fork tube (13) is divided into two outlet tubes from the middle section, and the two outlet tubes of the fork tube (13) are located on the upper and lower sides between the aluminum metal flow channel (12) and the fork tube (13).

6. The molding apparatus for producing and processing copper-aluminum composite materials according to claim 5, characterized in that: The maximum diameter of the conical section of the shaping device (2) is three times the minimum diameter, and the diameter ratio of the two end face diameters to the middle section diameter of the conical section of the shaping device (2) is 1:2:3.

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