An annealing device for wire

Abstract

The utility model relates to metal wire processing technical field provides an annealing device for metal wire, include: operating platform, be provided with annealing unit and adjusting unit on it, annealing unit has first annealing wheel and second annealeing wheel, metal wire is in turn around through first annealing wheel and second annealing wheel, first annealing wheel and second annealing wheel and the metal wire between them connect annealing circuit, are used for annealing operation to metal wire, adjusting unit has connecting rod and positioning wheel, the positioning wheel is adjustably connected on connecting rod, and with metal wire sliding contact, when adjusting the axial position of positioning wheel on connecting rod, can change the axial contact position of metal wire and first annealing wheel. The adjustment makes the contact area between metal wire and conductive wear -resisting ring dynamic shift in the axial direction, avoids long -term concentration in the same part, realizes the periodic rotation of contact area, alleviates local wear and tear and current concentration phenomenon.

Description

Technical Field

[0001] This utility model belongs to the field of metal wire processing technology, specifically relating to an annealing device for metal wires. Background Technology

[0002] A metal rod is drawn into a thin wire through a series of dies with progressively smaller dimensions. This process elongates and breaks down the grains, generating numerous dislocations and lattice distortions, which reduce its plasticity, elongation, and electrical conductivity. Annealing is necessary to restore the mechanical and electrical properties of the metal wire.

[0003] Currently, continuous resistance annealing is widely used. This method utilizes the inherent resistance of the metal wire to generate heat through electrical current, achieving uniform annealing via Joule heating. It offers advantages such as high production efficiency and consistent performance throughout the wire. In practice, the metal wire is used as a resistive load, with both ends electrically connected to two conductive wheels. Current flows through the conductive wheels to the metal wire, heating it to the annealing temperature.

[0004] To improve conductivity reliability and extend equipment life, existing technologies typically incorporate a replaceable conductive wear-resistant ring around the outer circumference of the conductive wheel. This wear-resistant ring combines good conductivity with wear resistance, helping to reduce contact resistance fluctuations, minimize electrical spark generation, and improve the stability of the annealing process.

[0005] However, during long-term operation, if the metal wire's path remains fixed, its contact area with the conductive wear-resistant ring will always be concentrated in a specific localized area of ​​the ring. This continuous dynamic sliding contact can lead to uneven wear, surface roughening, and even microcracks in that area. As the contact area decreases, the local contact resistance increases, making it prone to localized overheating when energized, potentially causing arcing or electrical spark discharge. This process not only exacerbates the ablation and electro-erosion of the wear-resistant ring material (forming pits or protrusions) but also damages the surface quality of the metal wire, causing burn defects. Simultaneously, unstable current transmission will result in uneven heating of the metal wire, affecting the annealing effect and causing performance fluctuations. Utility Model Content

[0006] To address the aforementioned shortcomings of existing technologies, the technical problem this invention aims to solve is to provide an annealing device for metal wires. By setting an adjustment unit on the operating table, adjusting the axial position of the positioning wheel on the connecting rod changes the axial contact position between the metal wire and the first annealing wheel. This adjustment causes a dynamic axial shift in the contact area between the metal wire and the conductive wear-resistant ring, preventing long-term concentration in the same area and achieving periodic rotation of the contact area, thus reducing localized wear and current concentration.

[0007] The technical solution adopted by this utility model to solve its technical problem is to propose an annealing device for metal wire, comprising:

[0008] Control panel;

[0009] An annealing unit is provided on the operating table and has a first annealing wheel and a second annealing wheel. The metal wire is wound around the first annealing wheel and the second annealing wheel in sequence. The first annealing wheel, the second annealing wheel, and the metal wire between them are connected to an annealing circuit for annealing the metal wire.

[0010] A conductive wear-resistant ring is fitted around the outer periphery of the first annealing wheel, and the metal wire slides in contact with the conductive wear-resistant ring. The conductive wear-resistant ring is used to protect the first annealing wheel.

[0011] An adjustment unit is provided on the operating table and has a connecting rod and a positioning wheel. The axis of the connecting rod is parallel to the axis of the first annealing wheel. The positioning wheel is adjustablely connected to the connecting rod and is located on the path of the metal wire before it enters the first annealing wheel. The positioning wheel is in sliding contact with the metal wire.

[0012] When the position of the positioning wheel connected to the connecting rod is adjusted, it is used to change the axial contact position between the metal wire and the conductive wear-resistant ring.

[0013] In the above-mentioned annealing device for metal wire, the outer periphery of the positioning wheel has a groove structure, and the metal wire is slidably embedded in the groove structure to provide a limit for the metal wire.

[0014] In the annealing apparatus for metal wire described above, the groove structure is V-shaped.

[0015] In the aforementioned annealing device for metal wire, the adjusting unit further includes an adjusting nut. The outer periphery of the connecting rod has an external thread, and the adjusting nut is threaded onto the connecting rod. The positioning wheel is rotatably mounted on the adjusting nut via a bearing. When the adjusting nut is rotated, it is used to adjust the position of the positioning wheel connected to the connecting rod.

[0016] In the annealing apparatus for metal wire described above, the conductive wear-resistant ring is made of nickel or a nickel alloy.

[0017] In the above-mentioned annealing device for metal wire, the annealing unit further includes a preheating wheel, which is located on the path of the metal wire before it enters the positioning wheel. The preheating wheel, the first annealing wheel, and the metal wire between them are connected to a preheating circuit to preheat the metal wire.

[0018] In the aforementioned annealing apparatus for metal wire, a pipe is also provided on the operating table, which covers the outside of the metal wire between the first annealing wheel and the second annealing wheel. An inert gas is introduced into the pipe to isolate oxygen.

[0019] In the above-mentioned annealing apparatus for metal wire, a cooling pipe is also provided on the operating table, which is located downstream of the second annealing wheel. The cooling pipe covers the metal wire that has completed the annealing operation and is used to cool the metal wire.

[0020] In the above-mentioned annealing device for metal wire, a number of guide wheels are also provided on the operating table. The metal wire between the preheating wheel and the positioning wheel passes through the guide wheels in sequence, and the guide wheels are used to provide path guidance for the metal wire.

[0021] In the aforementioned annealing apparatus for metal wire, a support wheel is also provided on the operating table, which is located between two adjacent guide wheels and slides in contact with the metal wire.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] (1) By setting an adjustment unit on the operating table, the axial contact position between the metal wire and the first annealing wheel can be changed when the axial position of the positioning wheel on the connecting rod is adjusted. This adjustment causes the contact area between the metal wire and the conductive wear-resistant ring to shift dynamically in the axial direction, avoiding long-term concentration in the same position, realizing the periodic rotation of the contact area, and reducing local wear and current concentration.

[0024] (2) The outer circumference of the positioning wheel is provided with a V-shaped groove structure. The metal wire is slidably embedded in the V-shaped groove structure. The axial limit and automatic centering functions are realized by the symmetrical contact of the inclined surfaces on both sides. This effectively suppresses the axial offset or jumping caused by vibration, tension fluctuation or external disturbance during high-speed operation, and greatly improves the stability and process consistency of the metal wire transmission.

[0025] (3) The positioning wheel is rotatably mounted on the adjusting nut via a bearing, allowing it to rotate synchronously with the metal wire. This transforms traditional sliding friction into rolling support, significantly reducing running resistance and frictional heat. This design not only reduces the risk of mechanical damage to the surface of the metal wire, avoiding defects such as scratches and microcracks, but also further ensures the integrity of its surface finish and mechanical properties. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of this solution.

[0027] Figure 2 yes Figure 1 A schematic diagram of the hidden part of the structure.

[0028] In the diagram, 1 is the operating table; 2 is the first annealing wheel; 3 is the second annealing wheel; 4 is the connecting rod; 5 is the positioning wheel; 6 is the groove structure; 7 is the adjusting nut; 8 is the preheating wheel; 9 is the pipe; 10 is the cooling pipe; 11 is the guide wheel; and 12 is the support wheel. Detailed Implementation

[0029] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0030] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0031] like Figures 1 to 2 As shown, this solution provides an annealing device for metal wire, comprising: an operating table 1; an annealing unit, which is mounted on the operating table 1 and has a first annealing wheel 2 and a second annealing wheel 3, through which the metal wire sequentially passes. The first annealing wheel 2, the second annealing wheel 3, and the metal wire between them are connected to an annealing circuit for annealing the metal wire; a conductive wear-resistant ring is fitted around the outer circumference of the first annealing wheel 2, and the metal wire slides in contact with the conductive wear-resistant ring, which protects the first annealing wheel 2; and an adjusting unit, which is mounted on the operating table 1 and has a connecting rod 4 and a positioning wheel 5. The axis of the connecting rod 4 is parallel to the axis of the first annealing wheel 2, and the positioning wheel 5 is adjustablely connected to the connecting rod 4 and located on the path of the metal wire before it enters the first annealing wheel 2. The positioning wheel 5 slides in contact with the metal wire and applies a clamping force to the metal wire to increase the contact pressure and wrap angle between it and the conductive wear-resistant ring, ensuring stable and reliable electrical contact.

[0032] During operation, the metal wire, having completed the drawing process, is continuously drawn to the operating table 1 and sequentially wound around the first annealing wheel 2 and the second annealing wheel 3 in the annealing unit. The metal wire is wound around the first annealing wheel 2 and the second annealing wheel 3 with a certain wrap angle to ensure good electrical contact and tension transmission; the free section between the first annealing wheel 2 and the part wound around the wheel body together constitute the current-carrying path. The annealing circuit connects one pole of a DC or AC power supply to the first annealing wheel 2 and the other pole to the second annealing wheel 3 through a conductive connection component. Current flows into the metal wire through the first annealing wheel 2, is conducted along its axial direction, and then returns to the power supply through the second annealing wheel 3, forming a complete closed loop. Due to the metal wire's inherent resistivity, Joule heating is generated when a large current passes through it, causing its temperature to rise rapidly to the recrystallization temperature range, achieving continuous online annealing.

[0033] A conductive wear-resistant ring is replaceably fitted around the outer circumference of the first annealing wheel 2. The metal wire directly contacts and slides against the surface of the conductive wear-resistant ring. The conductive wear-resistant ring is used to carry current and protect the body of the first annealing wheel 2 from mechanical wear and electrical spark erosion, thus extending its service life.

[0034] Since the axial direction of the connecting rod 4 is parallel to the axial direction of the first annealing wheel 2, the position of the metal wire contacting the first annealing wheel 2 can be changed by adjusting the axial position of the positioning wheel 5 on the connecting rod 4, thereby controlling the actual contact area distribution with the conductive wear-resistant ring. For example, when the positioning wheel 5 moves along the connecting rod 4 in a certain axial direction, the guide path of the metal wire is deflected, making it more inclined to contact the side of the conductive wear-resistant ring; conversely, the reverse adjustment makes the contact area biased to the other side. This design can periodically transfer high-stress and high-current-density areas within a certain range, breaking the original fixed contact mode and realizing the dynamic distribution and alternating use of the contact strip.

[0035] This solution effectively avoids the long-term concentration of current and mechanical friction at the same location on the conductive wear-resistant ring, significantly reducing the risks of localized overheating, electrolytic corrosion, and accelerated wear. On one hand, it extends the service life of the conductive wear-resistant ring, reduces downtime for replacement, and improves equipment operating efficiency; on the other hand, it improves the uniformity and stability of current conduction, preventing uneven heating of the metal wire or fluctuations in annealing quality due to poor contact. Furthermore, stable and reliable electrical contact can suppress the generation of electric sparks, preventing electrolytic corrosion damage to the metal wire surface, thereby ensuring the consistency of the surface quality, conductivity, and mechanical properties of the finished wire.

[0036] More preferably, the outer periphery of the positioning wheel 5 has a groove structure 6, and the metal wire is slidably embedded in the groove structure 6 to achieve positioning and prevent deviation during operation.

[0037] More preferably, the groove structure 6 is V-shaped. By setting the V-shaped groove structure 6 on the outer periphery of the positioning wheel 5, the metal wire is effectively constrained within a predetermined path, realizing axial limiting and automatic centering functions. The V-shaped groove structure 6 can form symmetrical contact through the inclined surfaces on both sides, preventing the metal wire from axially shifting or jumping due to vibration, tension fluctuations or external disturbances during high-speed operation, which significantly improves the transmission stability and process consistency of the entire annealing system.

[0038] More preferably, the adjustment unit further includes an adjustment nut 7, the outer periphery of the connecting rod 4 has an external thread, the adjustment nut 7 is threadedly connected to the connecting rod 4, and the positioning wheel 5 is rotatably mounted on the adjustment nut 7 via a bearing.

[0039] The positioning wheel 5 is rotatably mounted on the adjusting nut 7 via a bearing, so that the positioning wheel 5 can rotate synchronously with the metal wire, changing from sliding friction to rolling support, greatly reducing running resistance, avoiding defects such as scratches, oxidation or micro-cracks on the surface of the metal wire caused by dry friction, and ensuring the surface smoothness and mechanical properties of the finished wire.

[0040] By periodically rotating the adjusting nut 7, it moves axially relative to the connecting rod 4, causing the positioning wheel 5 to shift synchronously, thereby changing the axial contact position between the metal wire and the first annealing wheel 2. This adjustment causes the contact area between the metal wire and the conductive wear-resistant ring to dynamically shift axially, avoiding long-term concentration in the same area and achieving periodic rotation of the contact area, reducing local wear and current concentration. The rotation of the adjusting nut 7 can be done manually or driven by automated equipment.

[0041] More preferably, the conductive wear-resistant ring is made of nickel or a nickel alloy.

[0042] Nickel has high electrical conductivity, which helps reduce the accumulation of resistive heat during current transmission, preventing the conductive wear-resistant ring from overheating and ensuring stable current flow into the metal wire. Compared to annealing wheels made of iron-based or low-conductivity materials, nickel rings, due to their excellent conductivity and denser surface oxide film, can effectively suppress the increase in contact resistance, reduce the risk of local overheating and electrical spark discharge, and improve the electrothermal stability of the annealing process.

[0043] Nickel materials possess moderate hardness and good plasticity and toughness, ensuring wear resistance while preventing brittle spalling. During long-term sliding friction with high-speed metal wires, they exhibit excellent resistance to abrasive and adhesive wear. Compared to low-carbon steel or easily detached plating materials, nickel rings are less prone to scratches, peeling, or material migration, maintaining a smooth surface for extended periods. This facilitates stable and reliable electrical contact, extends service life, and reduces downtime for maintenance.

[0044] More preferably, the annealing unit further includes a preheating wheel 8, located on the path of the metal wire before it enters the positioning wheel 5. The preheating wheel 8 and the first annealing wheel 2 are respectively connected to the two poles of the preheating circuit through a conductive connection component. The metal wire between them acts as a conductor to participate in the energization, thereby preheating the metal wire. By setting the preheating wheel 8, the metal wire is preheated before the main annealing, allowing its temperature to rise gradually, avoiding problems such as excessive internal and external temperature differences, uneven structure, or surface cracks caused by instantaneous high-current heating. Gradient heating helps reduce thermal stress and improve recrystallization uniformity, making it particularly suitable for the annealing treatment of heat-sensitive materials such as high-carbon steel and alloy wires.

[0045] More preferably, the operating table 1 is also provided with a pipe 9, which covers the outside of the metal wire between the first annealing wheel 2 and the second annealing wheel 3, and an inert gas is introduced into the pipe 9 to isolate oxygen.

[0046] Nitrogen or argon gas is introduced into the tube to create a localized inert environment, effectively isolating oxygen and preventing surface oxidation, decarburization, or oxide scale formation on the metal wire during high-temperature annealing. This not only improves the surface finish of the finished wire but also avoids problems such as pull-out breakage or reduced coating adhesion caused by oxide layers during subsequent processing.

[0047] More preferably, the operating table 1 is also provided with a cooling pipe 10, which is located downstream of the second annealing wheel 3. The cooling pipe 10 covers the metal wire that has completed the annealing operation and is used to cool the metal wire. Cooling can prevent grain boundary precipitation or coarsening and improve the strength, ductility and processing performance of the metal wire.

[0048] A cavity is provided inside the cooling pipe 10, and a through hole is left in the cavity for the metal wire to pass through. When the metal wire passes through this through hole, it will contact the inner wall of the through hole. Coolant is injected into the cavity. Based on the principle of heat exchange, the coolant indirectly contacts the metal wire through the through hole wall, thereby removing the heat from the metal wire and achieving rapid cooling. During the cooling process, the metal wire and the coolant do not come into direct contact, which can effectively avoid unnecessary deformation or oxidation of the metal wire during the cooling process, ensuring its consistency and reliability in subsequent processing or use.

[0049] More preferably, the operating table 1 is also provided with a number of guide wheels 11. The metal wire between the preheating wheel 8 and the positioning wheel 5 passes through the guide wheels 11 in sequence to guide the transmission path of the metal wire and ensure that it enters the subsequent work station smoothly.

[0050] More preferably, the operating table 1 is also provided with a support wheel 12, which is located between two adjacent guide wheels 11 and slides in contact with the metal wire to prevent the metal wire from sagging due to its own weight and to keep the transmission path straight and stable.

[0051] By setting multiple guide wheels 11 in the preheating section, the metal wire is guided at multiple points, ensuring its smooth operation in complex paths and avoiding vibration, jumping, or deviation caused by uneven force at a single point. Combined with the design of the support wheel 12, it can effectively prevent the metal wire from sagging during long-distance transmission, especially when running with low tension or fine diameter wires, significantly improving system stability.

[0052] It should be noted that in this utility model, the use of terms such as "first," "second," and "a" is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of those features. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly defined. The terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two elements or the interaction between two elements, unless otherwise explicitly defined. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0053] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0054] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. An annealing device for metal wires, characterized in that, include: Control panel; An annealing unit is provided on the operating table and has a first annealing wheel and a second annealing wheel. The metal wire is wound around the first annealing wheel and the second annealing wheel in sequence. The first annealing wheel, the second annealing wheel, and the metal wire between them are connected to an annealing circuit for annealing the metal wire. A conductive wear-resistant ring is fitted around the outer periphery of the first annealing wheel, and the metal wire slides in contact with the conductive wear-resistant ring. The conductive wear-resistant ring is used to protect the first annealing wheel. An adjustment unit is provided on the operating table and has a connecting rod and a positioning wheel. The axis of the connecting rod is parallel to the axis of the first annealing wheel. The positioning wheel is adjustablely connected to the connecting rod and is located on the path of the metal wire before it enters the first annealing wheel. The positioning wheel is in sliding contact with the metal wire. When the position of the positioning wheel connected to the connecting rod is adjusted, it is used to change the axial contact position between the metal wire and the conductive wear-resistant ring.

2. The apparatus for annealing wire of claim 1, wherein The positioning wheel has a groove structure on its outer periphery, and the metal wire is slidably embedded in the groove structure to provide a limit for the metal wire.

3. The annealing apparatus for metal wire as described in claim 2, characterized in that, The groove structure is V-shaped.

4. The apparatus for annealing wire of claim 1, wherein The adjustment unit also includes an adjustment nut. The outer circumference of the connecting rod has an external thread. The adjustment nut is threaded onto the connecting rod. The positioning wheel is rotatably mounted on the adjustment nut via a bearing. When the adjustment nut is rotated, it is used to adjust the position of the positioning wheel connected to the connecting rod.

5. The apparatus for annealing wire of claim 1, wherein The conductive wear-resistant ring is made of nickel or a nickel alloy.

6. The apparatus for annealing wire of claim 1, wherein The annealing unit also includes a preheating wheel, which is located on the path of the metal wire before it enters the positioning wheel. The preheating wheel, the first annealing wheel, and the metal wire between them are connected to a preheating circuit to preheat the metal wire.

7. The annealing apparatus for metal wire as described in claim 1, characterized in that, The operating table is also equipped with a pipe that covers the outside of the metal wire between the first annealing wheel and the second annealing wheel. An inert gas is introduced into the pipe to isolate oxygen.

8. The annealing apparatus for metal wire as described in claim 1, characterized in that, The operating table is also equipped with a cooling pipe located downstream of the second annealing wheel. The cooling pipe covers the metal wire that has completed the annealing operation and is used to cool the metal wire.

9. An annealing apparatus for metal wire as described in claim 6, characterized in that, The operating platform is also equipped with several guide wheels. The metal wire between the preheating wheel and the positioning wheel passes around the guide wheels in sequence. The guide wheels are used to provide path guidance for the metal wire.

10. The apparatus for annealing wire of claim 9, wherein The operating platform is also equipped with support wheels, which are located between two adjacent guide wheels and slide in contact with the metal wire.

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