A method for producing bright oxygen-free copper rod

Abstract

The application discloses a bright oxygen-free copper rod production method, comprising the following steps: (1) putting a copper plate into a melting furnace for melting, when being put into the melting furnace, the copper plate is gradually immersed into copper liquid in the melting furnace by a copper wire, and finally the copper wire is released, and the copper wire enters the copper liquid together with the copper plate; (2) the molten copper liquid flows into a holding furnace through a flow channel for heat preservation; (3) a seed rod is passed through a crucible assembly connected with the holding furnace, so that the copper liquid is attached to the surface of the seed rod to form a relatively thick copper casting rod; (4) the copper casting rod is sequentially cooled, hot-rolled, cooled again and wound into a coil to become a bright oxygen-free copper rod. When the copper plate is put in, the copper plate can be slowly released into the melting furnace by the copper wire, finally the copper wire enters the copper liquid together with the copper plate, and no other impurities are introduced, and the application effectively prevents the problem that the oxygen content in the copper liquid is greatly increased due to the direct and rapid sliding of the copper plate.

Description

Technical Field

[0001] This invention relates to the field of oxygen-free copper rods, and more specifically to a method for producing bright oxygen-free copper rods. Background Technology

[0002] Oxygen-free copper rod is an important raw material for manufacturing high-end electrical equipment conductors and magnet wire components such as oxygen-free wires. It is widely used in the manufacture of equipment and components such as generator sets, transformers, traction motors, and contact wires. The main quality indicators for conductors and magnet wires include tensile strength, elongation, conductivity, withstand voltage, oxygen content, and surface quality, among which oxygen content is one of the key quality indicators. For oxygen-free copper rods used in the production of conductors and magnet wires, if the oxygen content is too high, the following phenomena will occur: ① The oxygen in the oxygen-free copper rod exists in the form of copper oxide. From the perspective of crystal phase structure, copper oxide exists near the grain boundaries. Copper oxide appears at the grain boundaries in the form of inclusions, which negatively affects the toughness of the material, leading to a decrease in the mechanical properties of the oxygen-free copper rod and making it prone to breakage during subsequent processing; ② The presence of copper oxide will reduce the conductivity of the copper rod; ③ Annealing the processed copper products in hydrogen will produce bubbles and pinholes, affecting the surface quality; ④ Surface defects will reduce the high-voltage withstand performance of the product.

[0003] The dip-coating method for producing oxygen-free copper rods involves melting copper plates into molten copper. Utilizing the heat absorption capacity of cold copper rods, a thin, cold, pure copper core rod (seed rod) is passed vertically from bottom to top through a crucible assembly that maintains a certain liquid level. This allows the molten copper to fuse with the copper on the surface of the moving seed rod, gradually solidifying and combining to form a thicker cast rod. After passing through a cooling device and a hot rolling device, it is finally wound into a coil to produce a bright oxygen-free copper rod.

[0004] The equipment for dip coating mainly includes a melting furnace, a holding furnace, a pressure chamber, a crucible assembly, an upper transmission device, and a rolling mill. In the current production process, in order to protect the molten copper in the melting furnace and prevent its oxidation, charcoal (and / or graphite) is usually laid on top of the molten copper to isolate oxygen. However, when the roller conveyor puts the copper plate into the melting furnace, the copper plate slides down directly and quickly, splashing a large amount of molten copper, which leads to a significant increase in the oxygen content in the molten copper. Summary of the Invention

[0005] To address the aforementioned problems, this invention proposes a method for producing bright oxygen-free copper rods.

[0006] The technical solution adopted in this invention is as follows:

[0007] A method for producing bright oxygen-free copper rods includes the following steps:

[0008] (1) The copper plate is put into the melting furnace for melting. When it is put into the melting furnace, the copper plate is gradually submerged into the copper liquid in the melting furnace by the copper wire. Finally, the copper wire is released and the copper wire enters the copper liquid along with the copper plate.

[0009] (2) The molten copper flows into the heat preservation furnace through the flow channel for heat preservation;

[0010] (3) Pass the seed rod through the crucible assembly connected to the holding furnace, so that copper liquid adheres to the surface of the seed rod to form a thicker copper casting rod;

[0011] (4) The copper casting rod is cooled, hot rolled, cooled again, and wound into a circle to become a bright oxygen-free copper rod.

[0012] This application utilizes a copper wire to slowly release the copper plate into the melting furnace during the copper plate feeding process. Ultimately, the copper wire enters the molten copper along with the copper plate, without introducing other impurities. This application effectively prevents the problem of a significant increase in the oxygen content of the molten copper due to the copper plate sliding down directly and rapidly.

[0013] In one embodiment of the present invention, the copper plate further includes a preheating step before being put into the melting furnace.

[0014] The preheating step can be carried out in a preheating furnace, and its main purpose is to remove impurities such as moisture and sulfate ions.

[0015] In one embodiment of the present invention, the temperature of the heat preservation furnace is between 1140°C and 1180°C.

[0016] In one embodiment of the present invention, the temperature of the copper casting rod before hot rolling is between 600°C and 800°C.

[0017] In one embodiment of the present invention, the temperature during winding into a loop is between 45°C and 80°C.

[0018] This application further reduces the oxygen content of the final bright oxygen-free copper rod by effectively reducing the oxygen content of the copper melt. In one embodiment of the invention, the oxygen content of the bright oxygen-free copper rod is ≤10ppm.

[0019] In one embodiment of the present invention, one end of the copper plate has a through hole, and step (1) is implemented by a slow-release device, the slow-release device comprising:

[0020] Conveyor rollers are used to convey the copper plates;

[0021] A wire threading block mechanism is located below the copper plate. The wire threading block mechanism has a guide channel with an inlet and an outlet. The wire threading block mechanism includes two sets of symmetrically arranged wire threading block assemblies. Each wire threading block assembly includes a wire threading block and an opening and closing element that drives the wire threading block to move. The wire threading block has a wire threading groove. The wire threading block mechanism has a closed working position and an open working position. When the working position is closed, the opening and closing element causes the wire threading blocks to move closer together, and the two wire threading grooves form the guide channel. When the working position is open, the opening and closing element causes the wire threading blocks to move further apart, and a space for copper wires to pass through is formed between the two wire threading blocks.

[0022] A copper wire guide, located above the copper plate, is used for the copper wire to pass through. The copper wire guide has a vertical guide tube facing the inlet of the wire threading block mechanism. The axis of the outlet intersects the axis of the vertical guide tube. During operation, the copper wire passes through the vertical guide tube, passes through the through hole of the copper plate, then enters the guide channel through the inlet, and finally exits from the outlet of the guide channel, contacting the part of the copper wire located below the vertical guide tube.

[0023] A copper wire connection and fixing device is used to connect and fix the end of the copper wire passing through the guide channel to the part of the copper wire located below the vertical guide tube;

[0024] A copper wire clamping and cutting mechanism is used to clamp the copper wire below the vertical guide tube and cut the copper wire below the vertical guide tube.

[0025] The slow-release telescopic element is connected to the copper wire clamping and cutting mechanism and is used to drive the copper wire clamping and cutting mechanism closer to the melting furnace.

[0026] In practical applications, in order to ensure that the copper wire can move down reliably, the slow-feeding device also includes a conveying roller that works with the copper wire. The copper wire is conveyed downward by the rolling of the conveying roller.

[0027] In one embodiment of the present invention, a vertical telescopic element is further included, which is used to cooperate with the copper wire guide to drive the copper wire guide to move up and down.

[0028] The vertical telescopic element allows the copper wire guide to move upward before the copper wire clamping and cutting mechanism operates, preventing interference and ensuring that the copper wire connected to the copper plate has a certain length.

[0029] In practical applications, vertical telescopic elements can be cylinders, electric actuators, or other similar components. Slow-release telescopic elements can be cylinders, electric actuators, or hydraulic cylinders.

[0030] In one embodiment of the present invention, the copper wire guide further includes an inclined guide tube, the axis of which coincides with the axis of the outlet of the guide channel, and the inclined guide tube has a flared end near the outlet, and the lower side of the inclined guide tube has a release notch for the copper wire to release.

[0031] In one embodiment of the present invention, the copper wire clamping and cutting mechanism includes a horizontal telescopic element and two sets of clamping and cutting assemblies. The movable rod of the horizontal telescopic mechanism has a mounting base, and the two sets of clamping and cutting assemblies are symmetrically arranged on the mounting base. Each clamping and cutting assembly includes:

[0032] A pressure plate, slidably mounted on the mounting base, has an arc-shaped pressure surface on the side of the pressure plate that engages with the copper wire, and a cutting blade is located at the upper end of the arc-shaped pressure surface on the pressure plate; and

[0033] The compression telescopic element is installed on the mounting base and is used to move the pressure plate;

[0034] The horizontal telescopic mechanism is used to move the mounting base closer to or away from the vertically set copper wire. The two sets of clamping and cutting components are used to cooperate with each other to clamp the copper wire located below the vertical guide tube through two clamping plates and cut the copper wire at the upper end of the arc-shaped pressure surface.

[0035] In practical applications, horizontal telescopic elements can be cylinders, electric push rods, etc. Clamping telescopic elements can also be cylinders, electric push rods, etc.

[0036] In practical applications, the curved surface has raised and recessed points to ensure reliable clamping.

[0037] The specific working process of the delayed delivery device in this application is as follows:

[0038] The conveyor roller operates, moving the copper plate with the through hole to a set position, where the through hole is located above the wire threading block mechanism. Then, the vertical telescopic element operates, moving the copper wire guide downwards towards the through hole. The copper wire, under the action of external power (the conveyor roller), moves downwards, passing through the vertical guide tube, through the through hole in the copper plate, then through the inlet into the guide channel, and finally out of the outlet. Guided by a flared opening, it extends into the inclined guide tube, ultimately contacting the portion of the copper wire located below the vertical guide tube. Then, the copper wire connection and fixing device operates, connecting and fixing the end of the copper wire exiting the guide channel to the portion of the copper wire located below the vertical guide tube (the two contacting parts). This connection and fixing can be performed automatically or manually. After the connection and fixing are completed, the vertical telescopic element... The process begins with the copper wire guide moving upwards, and the horizontal telescopic element working, bringing the mounting base closer to the copper wire so that the two clamping and cutting components are positioned on either side of the wire. Then, the pressing telescopic element works, causing the pressure plate to clamp the copper wire located below the vertical guide tube. Specifically, the arc-shaped pressure surface clamps the copper wire, and the cutting blade cuts the copper wire at the top of the arc-shaped pressure surface. The conveying roller continues to work, moving the copper plate towards the melting furnace. The telescopic element is released and works synchronously. When the copper plate enters the furnace's feed inlet, it quickly descends under gravity. However, because the copper wire is clamped, it does not slide down rapidly but gradually slides down during the slow extension of the telescopic element. Finally, the pressing telescopic element releases, the pressure plate no longer clamps the copper wire, and the end of the copper wire enters the melting furnace with the copper plate, ultimately submerging into the molten copper.

[0039] The beneficial effects of this invention are: when the copper plate is fed into the furnace, the copper wire can slowly release the copper plate into the melting furnace, and the copper wire eventually enters the molten copper along with the copper plate, without introducing other impurities. This invention effectively prevents the problem of a large increase in the oxygen content in the molten copper due to the copper plate sliding down directly and quickly. Attached Figure Description

[0040] Figure 1 This is a schematic diagram showing the copper wire passing through the guide channel;

[0041] Figure 2 This is a schematic diagram of the copper wire clamping and cutting mechanism working after the copper wire guide moves upward;

[0042] Figure 3 This is a three-dimensional schematic diagram of the slow-release device;

[0043] Figure 4 This is a schematic diagram of the wire threading block mechanism, the copper wire guide, and the copper wire;

[0044] Figure 5 yes Figure 3 Enlarged view of point A in the middle;

[0045] Figure 6This is a three-dimensional schematic diagram of the copper wire clamping and cutting mechanism in operation after the copper wire guide moves upward;

[0046] Figure 7 yes Figure 6 Enlarged view of point B in the middle;

[0047] Figure 8 This is a schematic diagram of the mounting base and the clamping and cutting assembly;

[0048] Figure 9 This is a schematic diagram of the copper wire guide and the wire threading block mechanism;

[0049] Figure 10 This is a schematic diagram of a copper wire guide and a set of wire threading blocks.

[0050] The labels for the attached figures are as follows:

[0051] 1. Copper plate; 11. Through hole; 2. Conveyor roller; 3. Wire threading block mechanism; 31. Guide channel; 31a. Wire inlet; 31b. Wire outlet; 32. Wire threading block assembly; 321. Wire threading block; 3211. Wire threading groove; 322. Opening and closing element; 4. Copper wire guide; 41. Vertical guide tube; 42. Inclined guide tube; 421. Flared end; 422. Release notch; 5. Copper wire clamping and cutting mechanism; 51. Horizontal telescopic element; 52. Mounting base; 53. Clamping and cutting assembly; 531. Pressure plate; 5311. Arc-shaped pressure surface; 5312. Cutting blade; 532. Pressing telescopic element; 6. Slow-release telescopic element; 7. Melting furnace; 8. Copper wire. Detailed Implementation

[0052] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0053] In the description of this application, it should be noted that the terms "inner" and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. They are used only for the convenience of describing this application and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0054] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "setup" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0055] The present invention will now be described in detail with reference to the accompanying drawings.

[0056] like Figure 1 As shown, a method for producing bright oxygen-free copper rods includes the following steps:

[0057] (1) The copper plate 1 is put into the melting furnace 7 for melting. When it is put into the melting furnace 7, the copper plate 1 is gradually submerged into the copper liquid of the melting furnace 7 by the copper wire 8. Finally, the copper wire 8 is released and enters the copper liquid along with the copper plate 1.

[0058] (2) The molten copper flows into the heat preservation furnace through the flow channel for heat preservation;

[0059] (3) Pass the seed rod through the crucible assembly connected to the holding furnace, so that copper liquid adheres to the surface of the seed rod to form a thicker copper casting rod;

[0060] (4) The copper casting rod is cooled, hot rolled, cooled again, and wound into a circle to become a bright oxygen-free copper rod.

[0061] In this application, when copper plate 1 is added, copper wire 8 can slowly release copper plate 1 into melting furnace 7. In the end, copper wire 8 enters the copper liquid along with copper plate 1, without introducing other impurities. This application effectively prevents the problem of a large increase in oxygen content in copper liquid caused by copper plate 1 sliding down directly and quickly.

[0062] In this embodiment, the copper plate 1 is further subjected to a preheating step before being fed into the melting furnace 7. The preheating step can be carried out in a preheating furnace, and its main purpose is to remove impurities such as moisture and sulfate ions.

[0063] In this embodiment, the temperature of the heat preservation furnace is between 1140°C and 1180°C.

[0064] In this embodiment, the temperature of the copper casting rod before hot rolling is between 600°C and 800°C.

[0065] In this embodiment, the temperature during winding is between 45°C and 80°C.

[0066] This application further reduces the oxygen content of the final bright oxygen-free copper rod by effectively reducing the oxygen content of the copper melt. In this embodiment, the oxygen content of the bright oxygen-free copper rod is ≤10ppm.

[0067] In this embodiment, one end of the copper plate 1 has a through hole 11 for copper wires to pass through. In actual use, the through hole 11 can be prefabricated, and the supplier can be asked to prefabricate the through hole 11 when ordering the copper plate 1, or it can be obtained by stamping later.

[0068] In this embodiment, as Figures 1-10 As shown, step (1) is implemented by a slow-dispensing device, which includes:

[0069] Conveyor roller 2 is used to convey copper plate 1;

[0070] The wire threading block mechanism 3 is located below the copper plate 1. The wire threading block mechanism 3 has a guide channel 31, which has a threading inlet 31a and a threading outlet 31b, such as... Figure 9 and 10 As shown, in this embodiment, the wire threading block mechanism 3 includes two sets of symmetrically arranged wire threading block assemblies 32. The wire threading block assembly 32 includes a wire threading block 321 and an opening and closing element 322 for driving the wire threading block 321 to move. The wire threading block has a wire threading groove 3211. The wire threading block mechanism 3 has a closed working position and an open working position. When the working position is closed, the opening and closing element 322 drives the wire threading block 321 to move closer to each other, and the two wire threading grooves 3211 form a guide channel 31. When the working position is open, the opening and closing element 322 drives the wire threading block 321 to move further away from each other, and a space for the copper wire 8 to pass through is formed between the two wire threading blocks 321.

[0071] The copper wire guide 4 is located above the copper plate 1 and is used for the copper wire 8 to pass through. The copper wire guide 4 has a vertical guide tube 41 facing the inlet 31a of the wire threading block mechanism 3. The axis of the outlet 31b intersects the axis of the vertical guide tube 41. During operation, the copper wire 8 passes through the vertical guide tube 41 and then through the through hole 11 of the copper plate 1. Then it enters the guide channel 31 through the inlet 31a and finally exits from the outlet 31b of the guide channel 31, contacting the part of the copper wire 8 located below the vertical guide tube 41.

[0072] A copper wire connection and fixing device (omitted in the figure) is used to connect and fix the end of the copper wire 8 that passes through the guide channel 31 to the part of the copper wire 8 located below the vertical guide tube 41.

[0073] The copper wire clamping and cutting mechanism 5 is used to clamp the copper wire 8 below the vertical guide tube 41 and cut the copper wire 8 below the vertical guide tube 41.

[0074] The slow-release telescopic element 6 is connected to the copper wire clamping and cutting mechanism 5 and is used to drive the copper wire clamping and cutting mechanism 5 closer to the melting furnace 7.

[0075] In practical applications, in order to ensure that the copper wire 8 can move down reliably, the slow-release device also includes a conveying roller that works with the copper wire 8. The copper wire 8 is conveyed downward by the rolling of the conveying roller.

[0076] In practical applications, copper wire connection and fixing equipment can take many forms. For example, it can be tools such as pliers, which connect and fix the copper wire by manually or automatically spiraling it multiple times. Alternatively, it can be welding equipment, which connects and fixes the copper wire by welding.

[0077] In this embodiment, a vertical telescopic element (not shown in the figure) is also included. This vertical telescopic element cooperates with the copper wire guide 4 to move the copper wire guide 4 up and down. The vertical telescopic element allows the copper wire guide 4 to move upwards before the copper wire clamping and cutting mechanism 5 operates, preventing interference and ensuring that the copper wire 8 connected to the copper plate 1 has a certain length. In practical applications, the vertical telescopic element can be a cylinder, an electric push rod, or other similar components. The slow-release telescopic element 6 can be a cylinder, an electric push rod, or a hydraulic cylinder, or other similar components.

[0078] like Figure 9 As shown, in this embodiment, the copper wire guide 4 also includes an inclined guide tube 42. The axis of the inclined guide tube 42 coincides with the axis of the outlet 31b of the guide channel 31, and the end of the inclined guide tube near the outlet 31b has a flared end 421. The lower side of the inclined guide tube 42 has a detachment notch 422 for the copper wire 8 to detach.

[0079] like Figure 7 and 8 As shown, in this embodiment, the copper wire clamping and cutting mechanism 5 includes a horizontal telescopic element 51 and two sets of clamping and cutting assemblies 53. The movable rod of the horizontal telescopic mechanism has a mounting base 52, and the two sets of clamping and cutting assemblies 53 are symmetrically arranged on the mounting base 52. The clamping and cutting assembly 53 includes:

[0080] A pressure plate 531 is slidably mounted on a mounting base 52. The side of the pressure plate 531 that engages with the copper wire 8 has an arc-shaped pressure surface 5311. A cutting blade 5312 is located at the upper end of the arc-shaped pressure surface 5311 on the pressure plate 531.

[0081] The compression telescopic element 532 is installed on the mounting base 52 and is used to drive the pressure plate 531 to move;

[0082] The horizontal telescopic mechanism is used to move the mounting base 52 closer to or away from the vertically set copper wire 8. The two sets of clamping and cutting components 53 are used to cooperate with each other to clamp the copper wire 8 located below the vertical guide tube 41 through two clamping plates and cut the copper wire 8 at the upper end of the arc-shaped pressure surface 5311.

[0083] In practical applications, the horizontal telescopic element 51 can be a cylinder, an electric push rod, or other similar components. The pressing telescopic element 532 can also be a cylinder, an electric push rod, or other similar components.

[0084] In practical applications, the curved surface has raised and recessed points to ensure reliable clamping.

[0085] The specific working process of the delayed delivery device in this application is as follows:

[0086] The conveyor roller 2 operates, moving the copper plate 1 with the through hole 11 to a set position. At this position, the through hole 11 is located above the wire threading block mechanism 3. Then, the vertical telescopic element operates, moving the copper wire guide 4 downwards towards the through hole 11. The copper wire 8 moves downwards under the action of external power (the conveyor roller). The copper wire 8 passes through the vertical guide tube 41 and through the through hole 11 of the copper plate 1. It then enters the guide channel 31 through the inlet 31a and finally exits from the outlet 31b of the guide channel 31. Guided by the flared end 421, it extends into the inclined guide tube 42, ultimately contacting the portion of the copper wire 8 located below the vertical guide tube 41. Then, the copper wire connection and fixing device operates, connecting and fixing the end of the copper wire 8 exiting the guide channel 31 to the portion of the copper wire 8 located below the vertical guide tube 41 (the two contacting portions). The connection and fixing can be performed automatically or manually. See [link to relevant documentation]. Figure 1 , 3 After the connection and fixing are completed, the vertical telescopic element works, driving the copper wire guide 4 to move upward, and the horizontal telescopic element 51 works, driving the mounting base 52 to approach the copper wire 8, so that the two clamping and cutting components 53 are respectively located on both sides of the copper wire 8; then the pressing telescopic element 532 works, driving the pressure plate 531 to press the copper wire 8 located below the vertical guide tube 41. Specifically, the arc-shaped pressure surface 5311 is used to clamp the copper wire 8, and the cutting blade 5312 is used to cut the copper wire 8 at the upper end of the arc-shaped pressure surface 5311. See Figure 6 , 7 And 8; then the wire threading block mechanism 3 switches from the closed working position to the open working position. At this time, the copper wire 8 in the wire threading block mechanism 3 can be moved out normally. The conveying roller 2 continues to work, driving the copper plate 1 to move towards the melting furnace 7. The slow-release telescopic element 6 works synchronously. When it enters the feed port of the melting furnace 7 synchronously, the copper plate 1 will move down rapidly under the action of gravity. However, because the copper wire 8 is clamped, the copper plate 1 will not slide down quickly. Instead, it will gradually slide down during the slow extension of the slow-release telescopic element 6. Finally, the pressure telescopic element 532 is released, and the pressure plate 531 no longer clamps the copper wire 8. At this time, the end of the copper wire 8 enters the melting furnace 7 with the copper plate 1 and finally sinks into the molten copper together.

[0087] The above are merely preferred embodiments of the present invention and do not limit the scope of patent protection of the present invention. Any equivalent structural transformations made based on the description and drawings of the present invention, whether directly or indirectly applied to other related technical fields, are similarly included within the scope of protection of the present invention.

Claims

1. A method for producing bright oxygen-free copper rods, characterized in that, Includes the following steps: (1) The copper plate is put into the melting furnace for melting. When it is put into the melting furnace, the copper plate is gradually submerged into the copper liquid in the melting furnace by the copper wire. Finally, the copper wire is released and the copper wire enters the copper liquid along with the copper plate. (2) The molten copper flows into the heat preservation furnace through the flow channel for heat preservation; (3) Pass the seed rod through the crucible assembly connected to the holding furnace, so that copper liquid adheres to the surface of the seed rod to form a thicker copper casting rod; (4) The copper casting rod is cooled, hot rolled, cooled again, and wound into a ring to become a bright oxygen-free copper rod; One end of the copper plate has a through hole, and step (1) is implemented by a slow-release device, which includes: Conveyor rollers are used to convey the copper plates; A wire threading block mechanism is located below the copper plate. The wire threading block mechanism has a guide channel with an inlet and an outlet. The wire threading block mechanism includes two sets of symmetrically arranged wire threading block assemblies. Each wire threading block assembly includes a wire threading block and an opening and closing element that drives the wire threading block to move. The wire threading block has a wire threading groove. The wire threading block mechanism has a closed working position and an open working position. When the working position is closed, the opening and closing element causes the wire threading blocks to move closer together, and the two wire threading grooves form the guide channel. When the working position is open, the opening and closing element causes the wire threading blocks to move further apart, and a space for copper wires to pass through is formed between the two wire threading blocks. A copper wire guide, located above the copper plate, is used for the copper wire to pass through. The copper wire guide has a vertical guide tube facing the inlet of the wire threading block mechanism. The axis of the outlet intersects the axis of the vertical guide tube. During operation, the copper wire passes through the vertical guide tube, passes through the through hole of the copper plate, then enters the guide channel through the inlet, and finally exits from the outlet of the guide channel, contacting the part of the copper wire located below the vertical guide tube. A copper wire connection and fixing device is used to connect and fix the end of the copper wire passing through the guide channel to the part of the copper wire located below the vertical guide tube; A copper wire clamping and cutting mechanism is used to clamp the copper wire below the vertical guide tube and cut the copper wire below the vertical guide tube. The slow-release telescopic element is connected to the copper wire clamping and cutting mechanism and is used to drive the copper wire clamping and cutting mechanism closer to the melting furnace.

2. The method for producing a bright oxygen-free copper rod as described in claim 1, characterized in that, The copper plate also includes a preheating step before being put into the melting furnace.

3. The method for producing a bright oxygen-free copper rod as described in claim 1, characterized in that, The temperature of the heat preservation furnace is between 1140℃ and 1180℃.

4. The method for producing a bright oxygen-free copper rod as described in claim 1, characterized in that, The temperature of the copper casting rod before hot rolling is between 600℃ and 800℃.

5. The method for producing a bright oxygen-free copper rod as described in claim 1, characterized in that, The temperature during winding into a loop is between 45°C and 80°C.

6. The method for producing a bright oxygen-free copper rod as described in claim 1, characterized in that, The oxygen content of the bright oxygen-free copper rod is ≤10ppm.

7. The method for producing a bright oxygen-free copper rod as described in claim 1, characterized in that, It also includes a vertical telescopic element, which is used to cooperate with the copper wire guide to drive the copper wire guide to move up and down.

8. The method for producing a bright oxygen-free copper rod as described in claim 1, characterized in that, The copper wire guide also includes an inclined guide tube, the axis of which coincides with the axis of the outlet of the guide channel, and the inclined guide tube has a flared end near the outlet, and the lower side of the inclined guide tube has a release notch for the copper wire to release.

9. The method for producing a bright oxygen-free copper rod as described in claim 7, characterized in that, The copper wire clamping and cutting mechanism includes a horizontal telescopic mechanism and two sets of clamping and cutting assemblies. The movable rod of the horizontal telescopic mechanism has a mounting base, and the two sets of clamping and cutting assemblies are symmetrically arranged on the mounting base. Each clamping and cutting assembly includes: A pressure plate, slidably mounted on the mounting base, has an arc-shaped pressure surface on the side of the pressure plate that engages with the copper wire, and a cutting blade is located at the upper end of the arc-shaped pressure surface on the pressure plate; and The compression telescopic element is installed on the mounting base and is used to move the pressure plate; The horizontal telescopic mechanism is used to move the mounting base closer to or away from the vertically set copper wire. The two sets of clamping and cutting components are used to cooperate with each other to clamp the copper wire located below the vertical guide tube through two clamping plates and cut the copper wire at the upper end of the arc-shaped pressure surface.

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