Extrusion die for copper bar production

Abstract

The utility model discloses an extrusion die for copper bar production, which belongs to the technical field of extrusion dies and is characterized in that one end of an extrusion die body is fixedly connected with a mounting plate, the surface of the mounting plate is provided with mounting holes which are annularly distributed at equal intervals, one end of the extrusion die body is provided with a die hole, and one end of the die hole is provided with a working tape; according to the extrusion die for copper bar production, a flow guide nozzle can be additionally arranged at the discharging end of the extrusion die body through the connecting part arranged on the extrusion die body, and the stroke of a working belt is increased through a flow guide hole, so that the copper bar subjected to extrusion molding cannot be bent and wavy; and the flow guide coating is arranged on the inner wall of the die hole, the flow guide coating is a DLC coating, the hardness of the inner wall of the die hole can be greatly improved, meanwhile, the friction coefficient of the inner wall of the die hole is extremely low, deformation, abrasion and metal filing remaining of the die hole are avoided, and then the surface of the copper rod is prevented from being scratched and bruised.

Description

Technical Field

[0001] This utility model relates to the field of extrusion die technology, and more specifically, to an extrusion die for producing copper rods. Background Technology

[0002] The principle of copper rod extrusion is to place a pre-deformed copper billet in a rod-shaped mold, apply pressure along the axial direction, and extrude it into shape under high temperature and high pressure.

[0003] Currently, commonly used copper rod extrusion dies may cause scratches and dents on the surface of copper rods during production. They may also cause bending and wavy surfaces during the extrusion process. For example, a high-precision extrusion die for copper rod production disclosed in announcement number CN118875050A includes an extrusion die for extruding copper rods, an extrusion receiving device for horizontally receiving the extruded copper rods, and a detection device for detecting the surface quality of the extruded copper rods. The bottom of the extrusion die is provided with a fixed support base for support, and the top of the fixed support base is supported by a support frame.

[0004] As can be seen from the above-disclosed scheme, the inner wall of the extrusion die will wear down under long-term extrusion with the copper rod blank, which will deform it or increase the coefficient of friction, leaving metal shavings inside, which will cause scratches and dents on the surface of the copper rod, resulting in poor appearance of the copper rod. Furthermore, due to the short working belt stroke of the extrusion die, the extruded copper rod will bend or waviness after discharge, which will reduce the forming quality of the copper rod. Utility Model Content

[0005] To address the problems existing in the prior art, the purpose of this utility model is to provide an extrusion die for copper rod production. This extrusion die can add a guide nozzle to the discharge end of the extrusion die body through a connecting part, and increase the stroke of the working belt through the guide hole, thereby preventing the extruded copper rod from bending and wavy, improving the forming quality of the copper rod. Furthermore, by setting a guide coating on the inner wall of the die hole, the guide coating is a DLC coating, which can not only greatly improve the hardness of the inner wall of the die hole, but also make the friction coefficient of the inner wall of the die hole extremely low, preventing deformation, wear and residual metal chips, and thus preventing scratches and dents on the surface of the copper rod.

[0006] To solve the above problems, the present invention adopts the following technical solution.

[0007] An extrusion die for producing copper rods includes an extrusion die body. One end of the extrusion die body is fixedly connected to a mounting plate. The mounting plate has annularly spaced mounting holes on its surface. One end of the extrusion die body has a die hole with a working belt at one end. A limiting part is provided at one end of the extrusion die body, and a connecting part is fixedly connected to one end of the limiting part. A flow guiding component is detachably connected to one end of the connecting part. A heating component is detachably connected to the surface of the extrusion die body. This copper rod extrusion die allows for the addition of a flow guiding nozzle at the discharge end of the extrusion die body via the connecting part. The flow guiding hole increases the stroke of the working belt, preventing bending and wavy deformation of the extruded copper rod, thus improving the forming quality. Furthermore, by providing a flow guiding coating (DLC coating) on ​​the inner wall of the die hole, the hardness of the inner wall of the die hole is greatly increased, resulting in an extremely low coefficient of friction, preventing deformation, wear, and residual metal shavings, and thus preventing scratches and dents on the surface of the copper rod.

[0008] Furthermore, the flow guiding component includes a flow guiding nozzle, one end of which has a connecting groove, the bottom of which has an extrusion surface, and a flow guiding hole in the middle of the extrusion surface. The inner diameter of the flow guiding hole is the same as the minimum inner diameter of the die hole. The flow guiding hole can increase the stroke of the working belt and prevent the extruded copper rod from bending or wavy.

[0009] Furthermore, the die hole is conical in shape, and the inner wall of the die hole is provided with a flow guiding coating. The flow guiding coating is a DLC coating formed by superhard coating technology. The hardness of the DLC coating is close to that of diamond, and the coefficient of friction is extremely low, which can greatly improve the hardness of the inner wall of the die hole and increase the anti-stick performance of the inner wall of the die hole.

[0010] Furthermore, the heating assembly includes a heating plate, a pad is fixedly connected to the inner surface of the heating plate, and a positioning screw is movably connected to the surface of the pad. The pad is made of thermally conductive metal, which not only conducts heat but also improves the connection between the heating plate and the extrusion die body.

[0011] Furthermore, the surface of the extrusion die body is provided with a positioning groove, the inner wall of the positioning groove is provided with an internal thread, and the inner wall of the positioning groove is threadedly connected to the surface of the positioning screw.

[0012] Furthermore, the heating plate is arc-shaped, and an electric heating alloy wire is provided inside the heating plate. An external wire is electrically connected to the surface of the electric heating alloy wire. The heating plate can heat the extrusion die body, thereby reducing the heat loss rate of the internally heated copper billet and improving the forming quality of the copper rod.

[0013] Furthermore, an anti-slip sleeve is fixedly fitted onto the surface of the flow guide nozzle. The anti-slip sleeve is polygonal in shape, which facilitates the installation and removal of the flow guide nozzle with a wrench, allowing the flow guide nozzle to be removed when not in use.

[0014] Compared with existing technologies, the advantages of this utility model are:

[0015] (1) This solution can add a guide nozzle to the discharge end of the extrusion die body through the connecting part of the extrusion die body, and increase the stroke of the working belt through the guide hole, so that the extruded copper rod will not bend or wave, thus improving the forming quality of the copper rod.

[0016] (2) This solution provides a flow guiding coating on the inner wall of the die hole. The flow guiding coating is a DLC coating, which can not only greatly improve the hardness of the inner wall of the die hole, but also make the friction coefficient of the inner wall of the die hole extremely low, so that it will not deform, wear and leave metal chips, and thus will not cause scratches or damage to the surface of the copper rod. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the extrusion die body structure of this utility model;

[0019] Figure 3 This is a schematic diagram of the flow guide nozzle structure of this utility model;

[0020] Figure 4 for Figure 2 A cross-sectional view of the extrusion die body structure;

[0021] Figure 5 This is a schematic diagram of the heating plate structure of this utility model.

[0022] Explanation of the labels in the diagram:

[0023] 1. Extrusion die body; 11. Mounting plate; 12. Mounting hole; 13. Die hole; 14. Flow guide coating; 15. Positioning groove; 16. Connecting part; 17. Limiting part; 18. Working belt; 2. Flow guide nozzle; 21. Connecting groove; 22. Flow guide hole; 23. Anti-slip sleeve; 24. Extrusion surface; 3. Heating plate; 31. Pad block; 32. Positioning screw. 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] Example 1

[0026] Please see Figure 1-5 An extrusion die for producing copper rods includes an extrusion die body 1. One end of the extrusion die body 1 is fixedly connected to a mounting plate 11. The surface of the mounting plate 11 has annularly spaced mounting holes 12 for connecting bolts, thereby connecting the extrusion die to a copper rod extrusion production device. Its structure and working principle are existing technologies. One end of the extrusion die body 1 has a die hole 13, one end of which communicates with an extrusion cylinder, facilitating the extrusion of the internal billet by an extrusion rod. This allows the billet to gradually become thinner and be extruded into shape within the die hole 13. This is also existing technology. One end of the die hole 13 is provided with a working belt 18. One end of the extrusion die body 1 is provided with a limiting part 17, one end of which is fixedly connected to a connecting part 16. One end of the connecting part 16... A flow guiding assembly is detachably connected, including a flow guiding nozzle 2. One end of the flow guiding nozzle 2 has a connecting groove 21. The bottom of the connecting groove 21 is provided with an extrusion surface 24. A flow guiding hole 22 is provided in the middle of the extrusion surface 24. The interior of the flow guiding hole 22 is provided with the same flow guiding coating 14. The inner diameter of the flow guiding hole 22 is the same as the minimum inner diameter of the die hole 13. The flow guiding hole 22 can increase the stroke of the working belt 18 and prevent the extruded copper rod from bending or wavy. A heating assembly is detachably connected to the surface of the extrusion die body 1. The heating assembly includes a heating plate 3. A pad 31 is fixedly connected to the inner surface of the heating plate 3. A positioning screw 32 is movably connected to the surface of the pad 31. The pad 31 is made of heat-conducting metal, which not only conducts heat but also improves the connection between the heating plate 3 and the extrusion die body 1.

[0027] The die hole 13 is conical in shape. The inner wall of the die hole 13 is provided with a flow guiding coating 14. The flow guiding coating 14 is a DLC coating formed by superhard coating technology. The hardness of the DLC coating is close to that of diamond and the coefficient of friction is extremely low. This can greatly improve the hardness of the inner wall of the die hole 13 and increase the anti-stick performance of the inner wall of the die hole 13. This effectively improves the wear resistance of the extrusion die and reduces the coefficient of friction of the inner wall of the die hole 13, so that the surface of the copper rod will not be worn and no metal shavings will remain on the surface of the copper rod. The surface of the extrusion die body 1 has a positioning groove 15. The inner wall of the positioning groove 15 has an internal thread. The inner wall of the positioning groove 15 is threaded to the surface of the positioning screw 32.

[0028] The heating plate 3 is arc-shaped and has an electric heating alloy wire inside. The surface of the electric heating alloy wire is electrically connected to an external wire. The heating plate 3 can heat the extrusion die body 1, thereby reducing the heat loss rate of the internally heated copper billet and improving the forming quality of the copper rod. The surface of the guide nozzle 2 is fixedly fitted with an anti-slip sleeve 23. The anti-slip sleeve 23 is polygonal in shape, which makes it easy to install and remove the guide nozzle 2 with a wrench, so that the guide nozzle 2 can be removed when not in use.

[0029] When using the extrusion die for producing copper rods, the connecting groove 21 of the guide nozzle 2 can be manually aligned with the connecting part 16, and then the guide nozzle 2 can be tightened clockwise, so that one end of the connecting part 16 is pressed against the extrusion surface 24, and at the same time, one end of the guide nozzle 2 is pressed against the end face of the limiting part 17. Then, the extrusion die body 1 is connected to the copper rod extrusion device by bolts. After the copper billet is heated, it is transported into the extrusion cylinder and then extruded by the extrusion rod. The extrusion rod extrudes the billet into the die hole 13 and contacts the guide coating 14 for extrusion, thereby making the billet gradually thinner to the left and then enter the working belt 18 for forming. The copper rod formed by the working belt 18 continues to move to the left and enters the guide hole 22 for shaping before being discharged to the left. After being discharged, the copper rod is cooled, cut off, and transported into the collection device.

[0030] The above description is merely a preferred embodiment of this utility model; however, the protection scope of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in this utility model, based on the technical solution and its improved concept, should be included within the protection scope of this utility model.

Claims

1. A kind of extrusion die of copper bar production, including extrusion die body (1), one end of the extrusion die body (1) is fixedly connected with mounting plate (11), the surface of the mounting plate (11) is opened with annular equidistant distribution mounting hole (12), it is characterized by: One end of the extrusion die body (1) has a die hole (13), one end of the die hole (13) is provided with a working belt (18), one end of the extrusion die body (1) is provided with a limiting part (17), one end of the limiting part (17) is fixedly connected with a connecting part (16), one end of the connecting part (16) is detachably connected with a flow guiding component, and a heating component is detachably connected to the surface of the extrusion die body (1).

2. An extrusion die for the production of copper bars according to claim 1, characterized in that: The flow guiding assembly includes a flow guiding nozzle (2), one end of which has a connecting groove (21), the bottom of which has an extrusion surface (24), and the middle of which has a flow guiding hole (22).

3. The extrusion die for producing copper rods according to claim 1, characterized in that: The die hole (13) is conical in shape, and the inner wall of the die hole (13) is provided with a flow guiding coating (14), which is a DLC coating formed by superhard coating technology.

4. An extrusion die for the production of copper bars according to claim 1, characterized in that: The heating assembly includes a heating plate (3), a pad (31) is fixedly connected to the inner surface of the heating plate (3), and a positioning screw (32) is movably connected to the surface of the pad (31).

5. An extrusion die for the production of copper bars according to claim 4, characterized in that: The surface of the extrusion die body (1) is provided with a positioning groove (15), the inner wall of the positioning groove (15) is provided with an internal thread, and the inner wall of the positioning groove (15) is threadedly connected to the surface of the positioning screw (32).

6. An extrusion die for the production of copper bars according to claim 4, characterized in that: The heating plate (3) is arc-shaped, and an electric heating alloy wire is provided inside the heating plate (3), and an external wire is electrically connected to the surface of the electric heating alloy wire.

7. An extrusion die for the production of copper bars according to claim 2, characterized in that: The surface of the guide nozzle (2) is fixedly fitted with an anti-slip sleeve (23), and the anti-slip sleeve (23) is polygonal in shape.

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