Anti-oxidation copper wire intelligent annealing equipment and annealing process thereof

Abstract

The invention relates to the technical field of copper wire annealing, and discloses anti-oxidation intelligent copper wire annealing equipment and an annealing process thereof.The anti-oxidation intelligent copper wire annealing equipment comprises a tubular annealing device, the outer surface of the tubular annealing device fixedly communicates with a forming bin, an air pump is installed at the top of the forming bin, and a heating unit is arranged on the outer surface of the tubular annealing device; a turning and wrapping assembly used for preventing the copper wire from being oxidized is arranged in the forming bin, through rotation of a first shearing plate and a hollow ring, inert gas can form a tight annular structure fluid, the surface of the copper wire is tightly and evenly wrapped with the fluid, a barrier is formed, contact of external oxygen is effectively isolated, and therefore the risk of oxidation reaction is reduced, and the service life of the copper wire is prolonged. In addition, due to the natural overturning characteristic of the fluid of the annular structure under rotation of the first shearing plate, mixing and updating in the gas are promoted, the inreactivity between oxygen and inert gas is utilized, a trace amount of oxygen is gradually pushed to the outer side of the annular structure, and stable maintenance of the oxygen-free environment is further ensured.

Description

Technical Field

[0001] The invention relates to the technical field of copper wire annealing, and in particular to an anti-oxidation copper wire intelligent annealing device and an annealing process thereof. Background Art

[0002] The anti-oxidation copper wire intelligent annealing equipment is designed to prevent the copper wire from being oxidized during the annealing process by passing inert gas, and uses water cooling to quickly cool the copper wire after the annealing is completed.

[0003] However, there are still some problems with the existing annealing equipment:

[0004] First, although the existing annealing equipment adopts a cylindrical design and inert gas protection to reduce copper wire oxidation, the oxidation problem still exists. The root cause is that the copper wire inevitably carries oxygen when entering the furnace, which in turn promotes the risk of oxidation. This oxygen carrying phenomenon, combined with uncertainties in operation, makes it difficult to absolutely maintain an oxygen-free environment.

[0005] Oxidation has a profound impact on annealing equipment and copper wire products. First of all, in terms of equipment, oxidation will deteriorate the furnace environment, increase maintenance costs, damage heating elements and seals, shorten life, and reduce the consistency and stability of the annealing effect. At the same time, the oxidation heat threatens equipment safety and increases potential accidents. At the product level, the thin film formed on the surface of the oxidized copper wire weakens its electrical and thermal conductivity, and damages its mechanical and processing properties, especially in the field of wires and cables, resulting in increased resistance, signal attenuation and increased heat generation, affecting the overall performance of the product. In metal products, the reduced bonding strength of the oxidized copper wire will reduce the strength and durability of the product.

[0006] Second, in the current design and operation of annealing equipment, although efforts have been made to reduce the risk of copper wire oxidation and optimize the cooling effect, there are still two core challenges. First, in the water cooling stage, since it is difficult for the copper wire to completely isolate the trace oxygen remaining in the annealing furnace during the annealing process, as the annealing time goes by and the temperature rises, a layer of stubborn oxide film gradually accumulates on the surface of the copper wire. This film not only significantly weakens the electrical conductivity, thermal conductivity and mechanical strength of the copper wire, but also poses a direct threat to its overall quality and reliability as a key component of wires and cables, metal products, etc. What is more difficult is that the oxide film becomes a stumbling block for subsequent processing steps such as electroplating and welding, significantly increasing the process difficulty and cost, which is not conducive to the improvement of production efficiency and economic benefits;

[0007] On the other hand, the inert gas circulation system, as an important line of defense to inhibit the oxidation of copper wire, does not perform well in actual operation. During the gas circulation process, some oxygen will be mixed into the inert gas and recirculated into the annealing furnace. This unexpected situation completely breaks the originally carefully constructed oxygen-free environment, causing the copper wire to be continuously exposed to oxygen, thereby accelerating the process of oxidation reaction. In this environment, the oxide film not only forms faster, but also penetrates more easily into the interior of the copper wire, causing deeper damage to the organizational structure, further exacerbating the uncertainty and risk of the annealing process.

[0008] To this end, the present invention proposes an anti-oxidation copper wire intelligent annealing device and an annealing process thereof. Summary of the invention

[0009] The object of the present invention is to provide an anti-oxidation copper wire intelligent annealing device and an annealing process thereof to solve the problems raised in the above background technology.

[0010] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an anti-oxidation intelligent annealing device for copper wire, comprising a tubular annealer, the outer surface of the tubular annealer is fixedly connected to a forming bin, an air pump is installed on the top of the forming bin, a heating unit is arranged on the outer surface of the tubular annealer, and an overturning and wrapping assembly for preventing oxidation of the copper wire is arranged inside the forming bin, and the overturning and wrapping assembly comprises a hollow ring for creating an annular moving passage.

[0011] Preferably, the overturning and wrapping assembly also includes a tooth groove, which is opened in the middle of the hollow ring, and a slide groove is opened on the outer surface of the hollow ring. A plurality of sliding rods are fixedly connected in a circular and equidistant manner on the inner wall of the forming bin, and the sliding rods are all slidably connected to the inside of the slide groove. A plurality of sliding sleeve connecting rods are fixedly connected in a circular and equidistant manner on the inner wall of the forming bin and are slidably connected to the inside of the hollow ring. A plurality of tooth rods are fixedly connected in a circular and equidistant manner on the outer wall of the hollow ring, and the outer surface of the tooth rods is meshingly connected with an inner bevel tooth ring in a circular and equidistant manner.

[0012] Preferably, the overturning and wrapping assembly also includes a plurality of first shear plates, each two of the first shear plates form a group, and each four groups of the first shear plates are fixedly connected to the outer surface of the inner bevel gear ring, and a plurality of fixing rings are fixedly connected in a circular and equidistant arrangement on the inner wall of the forming bin, and the inner bevel gear rings are rotatably connected to the inside of the fixing ring, and a spring is fixedly connected to the outer surface of each of the first shear plates, and a second shear plate is fixedly connected to the end of each of the springs away from the first shear plate, and a hollow groove is provided on the outer surface of each of the second shear plates, and a rotating shaft is fixedly connected to the inside of each of the hollow grooves, and the outer surface of each rotating shaft is rotatably connected to a plurality of blade wheels arranged linearly and equidistantly.

[0013] Preferably, a separation and utilization component is provided at one end of the tubular annealing device away from the forming bin, and the separation and utilization component includes a casing, the casing is fixedly connected to the top of the tubular annealing device, a piston block is slidably connected inside the casing, the casing penetrates its upper and lower surfaces and extends to the top of the tubular annealing device to open an air hole, the top of the forming bin and the top of the casing are both equipped with a one-way valve concentric with the air hole, and the top of the casing is fixedly connected with a joint concentrically with the one-way valve.

[0014] Preferably, the separation and utilization component also includes a plate-type connecting rod, which is fixedly connected to the outer surface of the piston block, and a reciprocating groove is formed through the outer surface of the plate-type connecting rod away from the piston block. A variable frequency water-cooled motor 2 is installed on the top of the tubular annealing device, and the output shaft of the variable frequency water-cooled motor 2 is eccentrically fixedly connected to a curved rod, and the curved rod is slidably connected to the inside of the reciprocating groove. The variable frequency water-cooled motor 2 is electrically controlled to start and stop by an external controller, and the reciprocating groove consists of three notches, two of which are respectively staggered up and down, and the other notch is located on the side close to the two notches.

[0015] Preferably, a triangular rib is fixedly connected to the inner wall of the forming bin, a variable frequency water-cooled motor is fixedly connected to the outer surface of the triangular rib, a meshing gear is fixedly connected to the output shaft of the variable frequency water-cooled motor, the meshing gear is meshed with the tooth groove, and the variable frequency water-cooled motor is electrically controlled to start and stop by an external controller.

[0016] Preferably, the bottom of the forming warehouse and the tubular annealer are fixedly connected with a base, the air pump is electrically controlled to start and stop by an external controller, a cooling mechanism is externally connected to the side of the tubular annealer away from the forming warehouse, and an online mechanism is externally connected to the side of the forming warehouse away from the tubular annealer.

[0017] Preferably, the heating unit comprises: a resistance wire, an insulating layer and a temperature sensor, and the heating unit is electrically controlled to be started and shut down by an external controller.

[0018] Preferably, the cooling mechanism comprises: a water tank, a water pump and a solenoid valve, and the cooling mechanism is electrically controlled to start and stop by an external controller.

[0019] Preferably, the online mechanism comprises: a mechanical arm, a servo motor, a clamp and a position sensor, and the online mechanism is electrically controlled to start and stop by an external controller.

[0020] Preferably, the input end of the air pump is externally connected to an inert gas pipeline, the output end of the air pump is fixedly connected to a circulation pipe 1, and the outer surface of the circulation pipe 1 is fixedly connected to a circulation pipe 2.

[0021] The anti-oxidation copper wire intelligent annealing process includes the following steps:

[0022] Step 1: Start the gas pump and adjust the flow rate to 50L / min. At the same time, introduce nitrogen and argon with a purity of ≥99.99% to ensure that the gas purity meets the requirements;

[0023] Step 2: Use a robotic arm to smoothly feed the copper wire into the tubular annealer to avoid scratching or twisting;

[0024] Step 4: Start the tubular annealer, control the temperature at 500-600℃, and the heating rate at 5-10℃ / min. At the same time, the inert gas forms a ring passage in the furnace through the overturning and wrapping components in the tubular annealer, thereby ensuring that the oxygen content in the furnace is less than 100ppm;

[0025] Step 3: Keep at the set annealing temperature for 30-60 minutes to optimize the grain structure inside the copper wire and improve the conductivity and mechanical properties. After annealing, start the cooler immediately to cool the copper wire quickly and evenly at a cooling rate of 45°C / min to avoid over-tempering or thermal stress.

[0026] Step 4: During the cooling process, a mixture of ≤5% by volume of oxygen, nitrogen and argon is introduced into the cooler. Oxygen is used to generate bubbles in the water to promote heat exchange efficiency, while nitrogen and argon continue to protect the copper wire from oxidation.

[0027] Step 5: Check the surface of the annealed and cooled copper wire to ensure there are no defects such as oxidation, scratches or deformation.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] 1. Through the rotation of the first shear plate and the hollow ring, the inert gas can form a tight annular structure fluid, which is tightly and evenly coated on the surface of the copper wire to form a barrier, effectively isolating the contact with external oxygen, thereby reducing the risk of oxidation reaction. In addition, the natural overturning characteristics of the annular structure fluid under the rotation of the first shear plate not only promote the mixing and renewal of the gas inside, but also use the non-reactivity between oxygen and inert gas to gradually push a trace amount of oxygen to the outside of the annular structure, further ensuring the stable maintenance of the oxygen-free environment. First of all, the overturning and wrapping assembly reduces the deterioration of the furnace environment caused by oxidation, prolongs the service life of the heating elements and seals, and reduces maintenance costs. At the same time, the stable maintenance of the oxygen-free environment ensures the consistency and stability of the annealing effect and improves product quality.

[0030] Compared with the traditional cylindrical design and inert gas protection method, even though the traditional technology also uses inert gas for protection, it is difficult to completely avoid the oxygen carried by the copper wire when entering the furnace and the destruction of the oxygen-free environment caused by uncertain factors in the operation. The annular coating technology of the overturning and wrapping component realizes all-round and no-dead-angle protection of the copper wire surface through its unique fluid dynamic characteristics, and truly curbs the occurrence of oxidation reactions from the source. Therefore, from the perspective of improving the controllability, safety, product quality of the annealing process and reducing maintenance costs, the overturning and wrapping component has shown more obvious advantages and potential;

[0031] Among them: the combined design of the spring and the second shear plate introduces an elastic mechanism, and the second shear plate has hysteresis when following the rotation of the first shear plate. This hysteresis ensures that the annular coating fluid can fit more evenly when contacting the surface of the copper wire, similar to the flexible adjustment effect of a soft hammer, which effectively improves the tightness;

[0032] Among them: the blade wheels on both sides of the second shear plate effectively promote the overturning movement of the airflow inside the annular structure. Specifically, the edges of the blade wheels can cut and disturb the airflow during rotation, forming vortices and turbulence, thereby enhancing the mixing and renewal of the airflow inside. This overturning movement trend not only helps to quickly push oxygen to the outside of the annular fluid, but also improves the stability and uniformity of the oxygen-free environment, further ensuring the safety of the annealing process and product quality.

[0033] 2. The piston block is driven to reciprocate by the rotation of the crankshaft, so that the shell is periodically in a negative pressure and high pressure state. In the negative pressure stage, the oxygen and part of the inert gas in the tubular annealer will be sucked into the shell, and then discharged into the water tank in the high pressure stage. In particular, oxygen will produce bubbles and burst quickly when it enters the water. The impact force generated in this process can effectively remove the stubborn oxide film on the surface of the copper wire. This physical cleaning method is not only efficient, but also environmentally friendly. It does not require additional chemical treatment, which reduces production costs and environmental impact. At the same time, part of the inert gas introduced into the water tank can continue to protect the copper wire from oxidation.

[0034] The inert gas circulation system in the traditional annealing equipment is difficult to completely avoid the mixing of oxygen, resulting in the instability of the oxygen-free environment. The separation and utilization components effectively reduce the possibility of oxygen mixing through periodic negative pressure and high pressure conversion, ensuring the stability of the oxygen-free environment in the annealing furnace. In addition, compared with the traditional method that requires additional chemical treatment or physical and mechanical means to remove the oxide layer, the separation and utilization components use the physical phenomenon of oxygen bubbles in water and bursting to remove the oxide layer, which not only improves the removal efficiency, but also reduces the production cost. At the same time, due to the reduction of scrap rate and rework rate, the overall production cost is further reduced;

[0035] Among them: since the reciprocating groove is composed of three notches, the rotation of the crankshaft drives the piston block to reciprocate, thereby periodically generating a negative pressure state in the casing. The periodic negative pressure design can inhale the oxygen and part of the inert gas in the tubular annealer into the casing in a short time, and then discharge them under high pressure, thereby avoiding the destruction of the inert gas atmosphere by long-term negative pressure. In this way, the inert gas atmosphere in the tubular annealer can be kept relatively stable, effectively reducing the chance of oxygen mixing. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a frontal perspective schematic diagram of the main structure of the present invention;

[0037] Figure 2 It is a rear perspective schematic diagram of the main structure of the present invention;

[0038] Figure 3 It is a cross-sectional stereoscopic schematic diagram of the main structure of the present invention;

[0039] Figure 4 For the present invention Figure 3 A magnified three-dimensional schematic diagram of the structure at center A;

[0040] Figure 5 For the present invention Figure 3 The enlarged three-dimensional schematic diagram of the structure at B in the middle;

[0041] Figure 6 For the present invention Figure 3 The enlarged three-dimensional schematic diagram of the structure at C in the middle;

[0042] Figure 7 It is a cross-sectional perspective schematic diagram of the overturning and wrapping assembly of the present invention;

[0043] Figure 8 It is a partially cutaway stereoscopic schematic diagram of the separation and utilization components of the present invention.

[0044] In the figure:

[0045] 11. Tube type annealer; 12. Forming chamber; 13. Air pump; 14. Base;

[0046] The overturning and wrapping assembly includes: 21, a hollow ring; 22, a tooth groove; 23, a gear rod; 24, an inner bevel gear ring; 25, a first shear plate; 26, a spring; 27, a second shear plate; 28, a rotating shaft; 29, a blade wheel; 210, a triangular rib; 211, a variable frequency water-cooled motor 1; 212, a meshing gear;

[0047] The separation and utilization components include: 31, casing; 32, piston block; 33, air hole; 34, one-way valve; 35, joint; 36, plate-type connecting rod; 37, reciprocating groove; 38, variable frequency water-cooled motor 2; 39, crankshaft. DETAILED DESCRIPTION

[0048] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0049] See also Figures 1 to 8 , the present invention provides two embodiments:

[0050] Embodiment 1:

[0051] An anti-oxidation intelligent annealing device for copper wire comprises a tubular annealer 11, the outer surface of the tubular annealer 11 is fixedly connected to a forming bin 12, an air pump 13 is installed on the top of the forming bin 12, a heating unit is arranged on the outer surface of the tubular annealer 11, and a turning and wrapping assembly for preventing oxidation of the copper wire is arranged inside the forming bin 12, and the turning and wrapping assembly comprises a hollow ring 21 for creating an annular moving passage.

[0052] The overturning and wrapping assembly also includes a tooth groove 22, which is opened in the middle of the hollow ring 21. A slide groove is opened on the outer surface of the hollow ring 21, forming a plurality of sliding rods fixedly connected to the inner wall of the warehouse 12 in a circular and equidistant arrangement, and the sliding rods are all slidably connected to the inside of the slide groove, forming a plurality of sliding sleeve connecting rods slidably connected to the inside of the hollow ring 21 in a circular and equidistant arrangement on the inner wall of the warehouse 12, and a plurality of tooth rods 23 are fixedly connected in a circular and equidistant arrangement on the outer wall of the hollow ring 21, and the outer surface of the tooth rod 23 is meshed and connected with an inner bevel gear ring 24 in a circular and equidistant arrangement.

[0053] The overturning and wrapping assembly also includes a plurality of first shear plates 25, each two first shear plates 25 form a group, and each four groups of first shear plates 25 are fixedly connected to the outer surface of the inner bevel gear ring 24, forming a plurality of fixed rings arranged and fixedly connected in a circular and equidistant manner on the inner wall of the bin 12, and the inner bevel gear rings 24 are rotatably connected to the inside of the fixed ring, and the outer surface of each first shear plate 25 is fixedly connected to a spring 26, and the end of each spring 26 away from the first shear plate 25 is fixedly connected to a second shear plate 27, and the outer surface of each second shear plate 27 is provided with an empty groove, and the inside of each empty groove is fixedly connected to a rotating shaft 28, and the outer surface of each rotating shaft 28 is rotatably connected to a plurality of blade wheels 29 arranged and equidistantly in a linear manner.

[0054] A separation and utilization component is provided at one end of the tubular annealing device 11 away from the forming bin 12, and the separation and utilization component includes a casing 31, which is fixedly connected to the top of the tubular annealing device 11, and a piston block 32 is slidably connected inside the casing 31. The casing 31 penetrates its upper and lower surfaces and extends to the top of the tubular annealing device 11 to open an air hole 33. A one-way valve 34 concentric with the air hole 33 is installed on the top of the forming bin 12 and the top of the casing 31, and a joint 35 is fixedly connected to the top of the casing 31 and concentric with the one-way valve 34.

[0055] The separation and utilization component also includes a plate-type connecting rod 36, which is fixedly connected to the outer surface of the piston block 32. A reciprocating groove 37 is penetrated through the outer surface of the plate-type connecting rod 36 away from the piston block 32. A variable frequency water-cooled motor 38 is installed on the top of the tubular annealer 11. The output shaft of the variable frequency water-cooled motor 38 is eccentrically fixedly connected to a bent rod 39, and the bent rod 39 is slidably connected to the inside of the reciprocating groove 37. The variable frequency water-cooled motor 38 is electrically controlled to start and stop by an external controller. The reciprocating groove 37 consists of three notches, two of which are staggered up and down, and the other notch is located on the side close to the two notches.

[0056] A triangular rib 210 is fixedly connected to the inner wall of the forming bin 12, a variable frequency water-cooled motor 211 is fixedly connected to the outer surface of the triangular rib 210, a meshing gear 212 is fixedly connected to the output shaft of the variable frequency water-cooled motor 211, the meshing gear 212 is meshed with the tooth groove 22, and the variable frequency water-cooled motor 211 is electrically controlled to start and stop by an external controller.

[0057] The bottom of the forming chamber 12 and the tubular annealer 11 are fixedly connected with a base 14, the air pump 13 is electrically controlled to start and stop by an external controller, the side of the tubular annealer 11 away from the forming chamber 12 is externally connected to a cooling mechanism, and the side of the forming chamber 12 away from the tubular annealer 11 is externally connected to an online mechanism.

[0058] The heating unit includes: a resistance wire, an insulating layer and a temperature sensor. The heating unit is electrically controlled to start and stop by an external controller. The resistance wire is evenly distributed on the outer surface of the tubular annealer 11, the insulating layer is wrapped around the outside of the resistance wire, and the temperature sensor is installed inside the tubular annealer 11.

[0059] The cooling mechanism includes: a water tank, a water pump and a solenoid valve. The cooling mechanism is electrically controlled to start and stop by an external controller. The water tank is set on the ground, and cooling water is stored in the water tank. The water pump is installed inside the water tank. The solenoid valve is installed between the water tank and the tubular annealing device 11. The top of the water tank is connected to the joint 35.

[0060] The online mechanism includes: a robotic arm, a servo motor, a gripper and a position sensor. The online mechanism is electrically controlled to start and stop by an external controller. The robotic arm is set on the ground, the gripper is installed at the output end of the robotic arm, the servo motor can provide power for the robotic arm, and the position sensor is installed at the end of the gripper.

[0061] The input end of the air pump 13 is externally connected to an inert gas pipeline, the output end of the air pump 13 is fixedly connected to a circulation pipe 1, the outer surface of the circulation pipe 1 is fixedly connected to a circulation pipe 2, the end of the circulation pipe 1 away from the air pump 13 is fixedly connected to the inside of the forming bin 12, the circulation pipe 2 is fixedly connected to a side of the circulation pipe 1 close to the air pump 13, and the end of the circulation pipe 2 away from the air pump 13 is fixedly connected to a side of the tubular annealing device 11 away from the air pump 13.

[0062] Embodiment 2: The oxidation-resistant copper wire intelligent annealing process comprises the following steps:

[0063] Step 1: Start the gas pump 13 and adjust the flow rate to 50 L / min, while introducing nitrogen and argon with a purity of ≥ 99.99% to ensure that the gas purity meets the requirements;

[0064] Step 2: Use a robotic arm to smoothly feed the copper wire into the tubular annealer 11 to avoid scratching or twisting;

[0065] Step 4: Start the tubular annealer 11, control the temperature at 500-600°C, and control the heating rate at 5-10°C / min. At the same time, the inert gas forms a ring passage in the furnace through the overturning and wrapping components in the tubular annealer 11, thereby ensuring that the oxygen content in the furnace is less than 100ppm;

[0066] Step 3: Keep at the set annealing temperature for 30-60 minutes to optimize the grain structure inside the copper wire and improve the conductivity and mechanical properties. After annealing, start the cooler immediately to cool the copper wire quickly and evenly at a cooling rate of 45°C / min to avoid over-tempering or thermal stress.

[0067] Step 4: During the cooling process, a mixture of ≤5% by volume of oxygen, nitrogen and argon is introduced into the cooler. Oxygen is used to generate bubbles in the water to promote heat exchange efficiency, while nitrogen and argon continue to protect the copper wire from oxidation.

[0068] Step 5: Check the surface of the annealed and cooled copper wire to ensure there are no defects such as oxidation, scratches or deformation.

[0069] The working principle of the present invention in combination with the above is as follows:

[0070] Among them, the feeding of copper wire:

[0071] like Figure 1 and Figure 2 As shown, the operator starts the online mechanism by electrically controlling it through an external controller. At this time, the robot arm starts to move under the drive of the servo motor, and the gripper moves to the copper wire storage area under the guidance of the robot arm. At the same time, the gripper opens and clamps a certain length of copper wire.

[0072] When the gripper moves to the entrance of the forming bin 12, the proximity sensor sends an electrical signal to the external controller, and then the gripper puts the copper wire into the forming bin 12 and the tubular annealer 11 and releases the copper wire, while the gripper and the robot arm return to the standby state and wait for the next instruction to take the copper wire.

[0073] Among them, annealing of copper wire:

[0074] The operator starts the heating unit and the air pump 13 through the external controller. As the current passes through, the resistance wire heats up and transfers the heat to the tubular annealer 11. The temperature sensor monitors the temperature inside the tubular annealer 11 in real time and feeds back the temperature information to the external controller.

[0075] At the same time, the air pump 13 injects the inert gas into the forming chamber 12 and the tubular annealing device 11 through an external inert gas pipeline. As the inert gas is continuously injected, the inert gas forms a circulation flow inside the forming chamber 12 and the tubular annealing device 11, and continuously circulates inside the tubular annealing device 11 through the circulation pipe 1 and the circulation pipe 2, ensuring that the entire tubular annealing device 11 is filled with inert gas, further improving the anti-oxidation effect.

[0076] Finally, the copper wire is subjected to the heat generated by the resistance wire in the tubular annealer 11 and gradually heated to the annealing temperature. During this process, the internal structure of the copper wire will change, such as grain growth and stress elimination, thereby achieving the purpose of annealing.

[0077] Among them, to prevent copper wire from oxidizing during annealing:

[0078] like Figures 3 to 7 As shown, the operator starts the variable frequency water-cooled motor 211 on the surface of the triangular rib 210 through an external controller, and the output shaft of the variable frequency water-cooled motor 211 drives the meshing gear 212 to rotate synchronously, and then the rotation of the meshing gear 212 drives the meshing tooth groove 22 and the hollow ring 21 to rotate synchronously. Since the hollow ring 21 is located in the middle of the forming chamber 12, during the rotation of the hollow ring 21, it can guide the inert gas to form a trend of rotating perpendicular to the center of the hollow ring 21. This trend is a key step in forming an annular passage because it ensures that the inert gas can flow in a specific direction inside the tubular annealer 11.

[0079] At the same time, the rotation of the hollow ring 21 also drives the gear rod 23 on its surface to rotate synchronously, and then the inner bevel gear ring 24 drives the inner bevel gear ring 24 meshing with it to rotate, and drives the inner bevel gear ring 24 to start rotating around itself as the center of the circle.

[0080] As the inner bevel gear ring 24 rotates, the first shear plate 25 fixed on its outer surface also rotates synchronously. Since the first shear plate 25 adopts a rectangular design, its rotation not only drives the overall flow of the inert gas, but also generates an overturning trend. This overturning trend is achieved through the combined effect of the geometric shape and rotation direction of the first shear plate 25, which enables the inert gas to continuously change direction during the flow process, thereby more effectively covering the surface of the copper wire.

[0081] At the same time, the rotation of the first shear plate 25 also drives the spring 26 and the second shear plate 27 connected thereto. Since the spring 26 is made of elastic material, it will produce a certain hysteresis relative to the first shear plate 25 during the rotation process. This hysteresis is similar to the effect of a soft hammer, which helps to further stir and disperse the inert gas. During the rotation of the second shear plate 27, the blade wheel 29 not only rotates synchronously with the second shear plate 27, but also rotates due to direct contact with the inert gas. This rotation phenomenon increases the friction and collision between the inert gas and the blades, further promoting the uniform distribution and mixing of the inert gas. At the same time, the self-rotation also enables the blade wheel 29 to push the inert gas to the surface of the copper wire like a miniature fan, forming a tighter protective layer.

[0082] Under the combined effect of the rotation tendency provided by the hollow ring 21, the overturning tendency provided by the first shear plate 25 and the second shear plate 27, and the thrust generated by the rotation of the blade wheel 29, the inert gas gradually evolves into a fluid with an annular structure inside the tubular annealer 11. This annular fluid not only covers the surface of the copper wire, but also flows along the inner wall of the forming chamber 12, forming an effective anti-oxidation barrier.

[0083] Since inert gas does not react with oxygen, when the annular fluid contacts the oxygen on the surface of the copper wire, it can flip the oxygen to the outside of the annular airflow. With the continuous circulation and flipping of the annular fluid, the oxygen on the surface of the copper wire is continuously removed and diluted to below a safe level, thereby ensuring that the copper wire is protected from oxidation during the annealing process.

[0084] Among them, cooling of copper wire:

[0085] like Figure 1 , Figure 2 as well as Figure 8As shown, with the end of the annealing stage, the operator controls the external controller and starts the cooling mechanism and the on-line mechanism. At this time, the on-line mechanism transports the annealed copper wire to the cooling area. With the start of the cooling mechanism, the cooling water in the water tank begins to circulate and take away the heat from the surface of the copper wire.

[0086] At the same time, the operator also needs to operate the external controller and electrically control the start-up of the variable frequency water-cooled motor 2 38. At the same time, the output shaft of the variable frequency water-cooled motor 2 38 drives the crankshaft 39 to rotate. Since the crankshaft 39 is eccentrically arranged on the output shaft of the variable frequency water-cooled motor 2 38, a large centrifugal force is generated during its rotation, causing the crankshaft 39 to slide up and down inside the reciprocating groove 37. This sliding action drives the plate-type connecting rod 36 and the piston block 32 connected to the crankshaft 39 to move synchronously, thereby changing the space volume inside the casing 31. When the crankshaft 39 moves from the bottom to the top of the reciprocating groove 37, the internal space of the casing 31 increases, forming a negative pressure area. Conversely, when the crankshaft 39 returns to the bottom, the internal space of the casing 31 decreases, forming a high pressure area.

[0087] In the negative pressure stage, oxygen and inert gas are attracted and enter the interior of the casing 31 through the one-way valve 34 below. As mentioned in the above process, oxygen will be pushed to the outside by the inert gas in the annular structure fluid, and the density of the inert gas is relatively large, so what enters the interior of the casing 31 is mainly oxygen and some inert gas.

[0088] Subsequently, in the high-pressure stage, these oxygen gases are pushed out of the casing 31 together with a small amount of inert gas that is pushed in, and enter the joint 35 through the upper one-way valve 34. Since the joint 35 is fixedly connected to the water tank, these gases eventually enter the cooling water. In this process, the oxygen will quickly break into tiny bubbles at the moment of contact with the water surface due to the low temperature of the cooling water and the fact that the oxygen itself has a certain temperature. The impact force generated by the rupture helps to remove the oxide layer on the surface of the copper wire, and the inert gas is mixed into the water to continue to play its protective role, preventing the copper wire from being oxidized again during subsequent processing.

[0089] In addition, introducing the circulating inert gas and the mixed oxygen into the water tank together has another important significance: it realizes the reuse and purification of the inert gas. With the continuous circulation of cooling water, part of the inert gas will gradually dissolve in the water or be adsorbed by water molecules to form a stable bubble layer covering the water surface, thereby reducing the loss and waste of the inert gas. At the same time, introducing the gas containing oxygen into the water also avoids the possibility of these gases re-entering the annealing or cooling area to pose a potential threat to the copper wire.

[0090] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "including one..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0091] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An anti-oxidation copper wire intelligent annealing device, comprising a tubular annealer (11), the outer surface of the tubular annealer (11) is fixedly connected to a forming chamber (12), an air pump (13) is installed on the top of the forming chamber (12), and a heating unit is arranged on the outer surface of the tubular annealer (11), characterized in that: The forming chamber (12) is provided with an overturning and wrapping assembly for preventing oxidation of the copper wire, and the overturning and wrapping assembly comprises a hollow ring (21) for creating an annular movement passage for the inert gas.

2. The anti-oxidation copper wire intelligent annealing equipment according to claim 1, characterized in that: The overturning and wrapping assembly also includes a tooth groove (22), the tooth groove (22) is opened in the middle of the hollow ring (21), the outer surface of the hollow ring (21) is provided with a slide groove, the inner wall of the forming bin (12) is fixedly connected with a plurality of sliding rods arranged in an annular manner and at equal intervals, and the sliding rods are all slidably connected to the inside of the slide groove, and the inner wall of the forming bin (12) is also fixedly connected with a plurality of sliding sleeve connecting rods arranged in an annular manner and at equal intervals, and the plurality of tooth rods (23) are fixedly connected in an annular manner and at equal intervals on the outer wall of the hollow ring (21), and the outer surface of the tooth rod (23) is meshingly connected with an inner bevel tooth ring (24) arranged in an annular manner and at equal intervals.

3. The anti-oxidation copper wire intelligent annealing equipment according to claim 2, characterized in that: The overturning and wrapping assembly further comprises a plurality of first shearing plates (25), wherein two of the first shearing plates (25) form a group, and each group of four first shearing plates (25) is fixedly connected to the outer surface of the inner bevel gear ring (24). The inner wall of the forming bin (12) is fixedly connected to a plurality of fixing rings arranged in an annular manner and at equal intervals, and the inner bevel gear rings (24) are rotatably connected to the inside of the fixing ring. The outer surface of each first shearing plate (25) is fixedly connected to a spring (26), and the end of each spring (26) away from the first shearing plate (25) is fixedly connected to a second shearing plate (27). The outer surface of each second shearing plate (27) is provided with a hollow groove, and the interior of each hollow groove is fixedly connected to a rotating shaft (28), and the outer surface of each rotating shaft (28) is rotatably connected to a plurality of blade wheels (29) arranged in a linear manner and at equal intervals.

4. The anti-oxidation copper wire intelligent annealing equipment according to claim 1, characterized in that: A separation and utilization component is provided at one end of the tubular annealing device (11) away from the forming chamber (12), and the separation and utilization component comprises a casing (31), the casing (31) is fixedly connected to the top of the tubular annealing device (11), a piston block (32) is slidably connected inside the casing (31), the casing (31) penetrates its upper and lower surfaces and extends to the top of the tubular annealing device (11) to form an air hole (33), the top of the forming chamber (12) and the top of the casing (31) are both provided with a one-way valve (34) concentric with the air hole (33), and a joint (35) is fixedly connected to the top of the casing (31) and concentric with the one-way valve (34).

5. The anti-oxidation copper wire intelligent annealing equipment according to claim 4, characterized in that: The separation and utilization component also includes a plate-type connecting rod (36), the plate-type connecting rod (36) is fixedly connected to the outer surface of the piston block (32), and a reciprocating groove (37) is penetrated through the outer surface of the plate-type connecting rod (36) away from the piston block (32). A variable frequency water-cooled motor (38) is installed on the top of the tubular annealing device (11), and the output shaft of the variable frequency water-cooled motor (38) is eccentrically fixedly connected to a bent rod (39), and the bent rod (39) is slidably connected to the inside of the reciprocating groove (37). The variable frequency water-cooled motor (38) is electrically controlled to start and stop by an external controller. The reciprocating groove (37) consists of three notches, two of which are respectively staggered up and down, and the other notch is located on the side close to the two notches.

6. The anti-oxidation copper wire intelligent annealing equipment according to claim 2, characterized in that: A triangular rib (210) is fixedly connected to the inner wall of the forming bin (12); a variable frequency water-cooled motor (211) is fixedly connected to the outer surface of the triangular rib (210); an output shaft of the variable frequency water-cooled motor (211) is fixedly connected to a meshing gear (212); the meshing gear (212) and the tooth groove (22) are meshed with each other; and the variable frequency water-cooled motor (211) is electrically controlled to start and stop by an external controller.

7. The anti-oxidation copper wire intelligent annealing equipment according to claim 1, characterized in that: The bottoms of the forming chamber (12) and the tubular annealer (11) are fixedly connected with a base (14); the air pump (13) is electrically controlled to start and stop by an external controller; a cooling mechanism is externally connected to a side of the tubular annealer (11) away from the forming chamber (12); and a threading mechanism is externally connected to a side of the forming chamber (12) away from the tubular annealer (11).

8. An anti-oxidation copper wire intelligent annealing process, applied to an anti-oxidation copper wire intelligent annealing device as claimed in any one of claims 1 to 7, characterized in that: The following steps are involved: Step 1: Start the gas pump (13) and adjust the flow rate to 50 L / min, while introducing nitrogen and argon with a purity of ≥ 99.99% to ensure that the gas purity meets the requirements; Step 2: Use a robotic arm to smoothly feed the copper wire into the tubular annealer (11) to avoid scratching or twisting; Step 4: Start the tubular annealing device (11), control the temperature at 500-600°C, and control the heating rate at 5-10°C / min. At the same time, through the overturning and wrapping components in the tubular annealing device (11), the inert gas forms a ring passage in the furnace, thereby ensuring that the oxygen content in the furnace is less than 100ppm; Step 3: Keep at the set annealing temperature for 30-60 minutes to optimize the grain structure inside the copper wire and improve the conductivity and mechanical properties. After annealing, start the cooler immediately to cool the copper wire quickly and evenly at a cooling rate of 45°C / min to avoid over-tempering or thermal stress. Step 4: During the cooling process, a mixture of ≤5% by volume of oxygen, nitrogen and argon is introduced into the cooler. Oxygen is used to generate bubbles in the water to promote heat exchange efficiency, while nitrogen and argon continue to protect the copper wire from oxidation. Step 5: Check the surface of the annealed and cooled copper wire to ensure there are no defects such as oxidation, scratches or deformation.

Images