Electromagnetic induction annealing device and annealing process for multi-head wire drawing machine

Abstract

The application provides a multi-head wire drawing machine electromagnetic induction annealing device, and relates to the technical field of copper wire annealing. The first winding wheel is rotatably arranged on the bearing main body; and the first winding wheel is at least partially formed into a conductive structure. The second winding wheel is rotatably arranged on the bearing main body; when a plurality of wire drawing copper wires are introduced, each wire drawing copper wire passes around the first winding wheel and the second winding wheel; and the part of each wire drawing copper wire wound on the first winding wheel and the second winding wheel and the conductive structure together form a conductive loop, and the plurality of wire drawing copper wires form a plurality of parallel conductive loops. The electromagnetic induction device is arranged between the first winding wheel and the second winding wheel and is used for forming an alternating magnetic field; and the plurality of conductive loops all pass through the alternating magnetic field. The annealing process provided by the application is applied to the above-mentioned multi-head wire drawing machine electromagnetic induction device. The multi-head wire drawing machine electromagnetic induction device and the annealing process provided by the application can improve the technical problem that the copper wire is prone to surface unevenness after annealing.

Description

Technical Field

[0001] This invention relates to the field of copper wire annealing technology, and more specifically, to an electromagnetic induction annealing device and annealing process for a multi-head wire drawing machine. Background Technology

[0002] Low-speed wire EDM is a precision machining technology that uses a copper electrode wire moving unidirectionally at a speed of less than 0.2 m / s for electrical discharge cutting. It is mainly used in the manufacturing of precision molds and aerospace components. During the manufacturing process of the copper electrode wire, the copper wire undergoes an annealing treatment to ensure that its physical properties meet the requirements.

[0003] In existing technologies, after annealing, copper wires typically develop an uneven surface, resulting in reduced surface smoothness. Copper wires with low surface smoothness, when used to create copper electrode wires, are prone to significant errors during low-speed wire cutting, failing to meet high-precision requirements. Summary of the Invention

[0004] The technical problem solved by this invention is how to improve the phenomenon of uneven surface that easily occurs after copper wire annealing in the prior art.

[0005] The embodiments of the present invention can be implemented as follows:

[0006] This invention provides an electromagnetic induction annealing device for a multi-head wire drawing machine, used for annealing multiple drawn copper wires. The electromagnetic induction annealing device for the multi-head wire drawing machine includes:

[0007] The main body of the load-bearing structure;

[0008] A first winding wheel is rotatably disposed on the supporting body; at least a portion of the first winding wheel has a conductive structure.

[0009] The second winding wheel is rotatably disposed on the supporting body; when multiple drawn copper wires are introduced, each drawn copper wire passes around the first winding wheel and contacts the conductive structure; after passing around the second winding wheel, the drawn copper wire passes around the first winding wheel again and contacts the conductive structure; the portion of each drawn copper wire wound around the first winding wheel and the second winding wheel together with the conductive structure forms a conductive circuit, and multiple drawn copper wires form multiple parallel conductive circuits;

[0010] An electromagnetic induction device is disposed between the first winding wheel and the second winding wheel to generate an alternating magnetic field; all of the plurality of conductive loops pass through the alternating magnetic field.

[0011] Optionally, the electromagnetic induction device has a coil forming a cylindrical spiral structure; a plurality of the drawn copper wires pass through the coil and parallel to the center line of the coil.

[0012] Optionally, the electromagnetic induction device further includes a guide structure, which is prismatic in shape, and the coil is wound around the outer periphery of the guide structure along a spiral path to form a prismatic spiral structure; the guide structure has multiple parallel guide channels inside, and multiple wires are drawn through the multiple guide channels respectively.

[0013] Optionally, the first winding wheel is provided with a plurality of first grooves and a plurality of second grooves; the plurality of first grooves and the plurality of second grooves are arranged alternately; the plurality of first grooves are used to respectively accommodate a plurality of the drawn copper wires introduced into the first winding wheel; the plurality of second grooves are used to respectively accommodate a plurality of the drawn copper wires led out from the second winding wheel to the first winding wheel.

[0014] Optionally, the depth of the first groove is greater than the depth of the second groove.

[0015] Optionally, the bottom of the first groove forms a first arc-shaped groove bottom, and the bottom of the second groove forms a second arc-shaped groove bottom; the cross-sectional radius of the first groove bottom is greater than the cross-sectional radius of the second groove bottom.

[0016] Optionally, the electromagnetic induction annealing equipment for the multi-head wire drawing machine further includes multiple combing structures, wherein multiple spaced combing protrusions are formed on the combing structures, and a combing gap is formed between any two combing protrusions; the multiple combing gaps formed on the combing structures are used to allow multiple wires to pass through respectively.

[0017] In the direction of the drawn copper wire, the combing structure is provided on both sides of the first winding wheel and the combing structure is provided on both sides of the second winding wheel.

[0018] Optionally, any two adjacent comb protrusions are staggered in the routing direction of the drawn copper wire.

[0019] Optionally, the first winding wheel integrally forms the conductive structure.

[0020] The advantages of the electromagnetic induction annealing equipment for multi-head wire drawing machines provided by this invention compared to the prior art include:

[0021] In this electromagnetic induction annealing equipment for a multi-head wire drawing machine, after multiple copper wires are introduced, they first wrap around a first winding wheel, with each wire contacting a conductive structure. After wrapping around a second winding wheel, the wires wrap around the first winding wheel again, simultaneously contacting the conductive structure. This creates multiple conductive loops formed by the portions of the copper wires wound around the first and second winding wheels and the conductive structure. When an alternating magnetic field passes through these conductive loops, an induced current is generated. The Joule heating generated by this induced current heats the copper wires, achieving the annealing process. Because the induced current is instantaneously generated throughout the conductive loop, the copper wires within the loop can undergo uniform heating and annealing, avoiding localized high temperatures that cause peeling and overheating oxidation. This prevents uneven surfaces on the copper wires, thus improving the technical problem of surface unevenness that often occurs after copper wire annealing in existing technologies.

[0022] Furthermore, the alternating current is passed through the coil by passing the copper wire through the center line of the coil. When the coil forms an alternating magnetic field, the copper wire is roughly parallel to the magnetic field lines. This avoids the generation of induced eddy currents on the copper wire. Based on this, the high temperature generated on the surface of the copper wire due to the skin effect of the induced eddy currents can be avoided, thus avoiding the problems of surface overheating and oxidation of the copper wire. This can further improve the technical problem of uneven surface that easily occurs after copper wire annealing in the prior art.

[0023] In addition, the comb structure can restrict the position of multiple drawn copper wires and serve as a positioning guide. With multiple comb structures set at various locations along the trace path of the drawn copper wires, the stability of the drawn copper wires can be ensured, preventing the current changes caused by wire jumping and affecting the annealing effect. It can also ensure that multiple drawn copper wires are arranged in parallel, which helps to prevent interference between adjacent drawn copper wires and the occurrence of electric arcs between them.

[0024] An annealing process is applied to the electromagnetic induction annealing equipment for the aforementioned multi-head wire drawing machine, the annealing process comprising:

[0025] Multiple drawn copper wires are introduced from the first winding wheel, pass through the electromagnetic induction device after the drawn copper wires pass around the first winding wheel, and then pass around the first winding wheel again after the drawn copper wires pass around the second winding wheel and are led out.

[0026] Start the first winding wheel and the second winding wheel so that the drawn copper wire can run continuously along the preset path;

[0027] The electromagnetic induction device is activated, causing it to generate an alternating magnetic field.

[0028] The temperature of multiple drawn copper wires is monitored, and the intensity of the alternating magnetic field generated by the electromagnetic induction device is increased or decreased based on the acquired temperature data.

[0029] The annealing process provided by this invention is applied to the electromagnetic induction annealing equipment for the multi-head wire drawing machine described above. The beneficial effects of this annealing process compared to the prior art are the same as the beneficial effects of the electromagnetic induction annealing equipment for the multi-head wire drawing machine provided above compared to the prior art, and will not be repeated here. Attached Figure Description

[0030] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 This is one of the structural schematic diagrams of the electromagnetic induction annealing equipment for a multi-head wire drawing machine provided in the embodiments of this application;

[0032] Figure 2 This is the second schematic diagram of the electromagnetic induction annealing equipment for a multi-head wire drawing machine provided in the embodiments of this application;

[0033] Figure 3 for Figure 2 Enlarged structural diagram at point A;

[0034] Figure 4 This is a schematic diagram of the structure of the first winding wheel provided in the embodiments of this application;

[0035] Figure 5 for Figure 4 Enlarged structural diagram at point B;

[0036] Figure 6 This is a flowchart of the annealing process provided in the embodiments of this application.

[0037] Icon: Electromagnetic induction annealing equipment for multi-head wire drawing machine 10, bearing body 100, first winding wheel 200, first groove 210, second groove 220, second winding wheel 300, electromagnetic induction device 400, guide structure 410, combing structure 500, combing protrusion 510, combing gap 511. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0039] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0040] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0041] In the description of this invention, it should be noted that if terms such as "upper," "lower," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of this invention is usually placed, they are only for the convenience of describing this invention and 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, and therefore should not be construed as a limitation of this invention.

[0042] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0043] It should be noted that, where there is no conflict, the features in the embodiments of the present invention can be combined with each other.

[0044] Please refer to the following: Figure 1 and Figure 2This embodiment provides an electromagnetic induction annealing device 10 for a multi-head wire drawing machine. It can be located at the rear end of the wire drawing machine to receive the drawn copper wire produced by the machine and to provide annealing to the wire. This electromagnetic induction annealing device 10 for a multi-head wire drawing machine can improve the technical problem of uneven surface that easily occurs after copper wire annealing in the prior art. It is worth noting that in this embodiment, the electromagnetic induction annealing device 10 for a multi-head wire drawing machine is mainly applied to the drawn copper wire produced by the multi-head wire drawing machine. The multi-head wire drawing machine can simultaneously produce multiple drawn copper wires with small diameters, such as copper wires with a diameter of 0.1mm-0.3mm. These multiple drawn copper wires can be simultaneously introduced into the electromagnetic induction annealing device 10 for a multi-head wire drawing machine, thereby completing the annealing simultaneously and increasing production capacity.

[0045] In this embodiment, please refer to the following: Figure 2 and Figure 3 The electromagnetic induction annealing equipment 10 for a multi-head wire drawing machine includes a support body 100, a first winding wheel 200, a second winding wheel 300, and an electromagnetic induction device 400. The first winding wheel 200 is rotatably mounted on the support body 100; at least a portion of the first winding wheel 200 forms a conductive structure. The second winding wheel 300 is rotatably mounted on the support body 100. It should be noted that the support body 100 is also provided with a drive device for driving the first winding wheel 200 and the second winding wheel 300, which can independently drive the first winding wheel 200 and the second winding wheel 300 respectively. When multiple drawn copper wires are introduced, each drawn copper wire wraps around the first winding wheel 200 and contacts the conductive structure. After wrapping around the second winding wheel 300, the drawn copper wire wraps around the first winding wheel 200 again and contacts the conductive structure. The portion of each drawn copper wire wound around the first winding wheel 200 and the second winding wheel 300 together with the conductive structure forms a conductive loop, and multiple drawn copper wires form multiple parallel conductive loops. In other words, when the drawn copper wire is wound onto the first winding wheel 200, the drawn copper wire contacts the conductive structure; when the drawn copper wire is wound onto the first winding wheel 200 twice, the drawn copper wire contacts the conductive structure twice, thereby forming a conductive loop. An electromagnetic induction device 400 is disposed between the first winding wheel 200 and the second winding wheel 300 to generate an alternating magnetic field; multiple conductive loops pass through the alternating magnetic field.

[0046] As described above, in the electromagnetic induction annealing equipment 10 for the multi-head wire drawing machine, after multiple copper wires are introduced, they first pass around the first winding wheel 200, and each wire contacts the conductive structure. After passing around the second winding wheel 300, the wires again wind around the first winding wheel 200, simultaneously contacting the conductive structure. Thus, the portions of the copper wires wound around the first and second winding wheels 200 and the conductive structure together form multiple conductive circuits. When an alternating magnetic field passes through these conductive circuits, an induced current can be generated within them. The Joule heating generated by this induced current heats the copper wires, achieving the annealing process. Because the induced current is instantaneously generated in the entire conductive circuit, the drawn copper wire in the conductive circuit can be heated and annealed uniformly as a whole. This avoids the problems of peeling and overheating oxidation caused by local high temperature, and thus avoids the uneven structure on the surface of the drawn copper wire. This improves the technical problem of uneven surface that easily occurs after copper wire annealing in the prior art.

[0047] In some embodiments, the conductive structure on the first winding wheel 200 can be integrated as a whole. Multiple conductive loops are in contact with this structure, forming a parallel circuit. When each conductive loop passes through an alternating magnetic field and generates an induced current, the resistance of the multiple conductive loops is approximately the same because the multiple drawn copper wires are essentially identical. With the drawn copper wires in parallel circuits and having the same voltage, each wire generates the same amount of heat, reaching essentially the same temperature. This ensures that the drawn copper wires in each conductive loop have the same annealing temperature, resulting in essentially the same annealing effect. Based on this, users can simultaneously complete the uniform annealing of multiple drawn copper wires and uniformly control the temperature, which is beneficial for overall control. Even when increasing or decreasing the number of drawn copper wires, the consistency of annealing can be guaranteed, facilitating efficient annealing of large-volume drawn copper wire production.

[0048] Optionally, in this embodiment, the first winding wheel 200 is integrally formed into a conductive structure; in other words, the first winding wheel 200 is integrally made of a conductive material.

[0049] Of course, in some other embodiments of this application, multiple conductive structures can also be provided on the first winding wheel 200, with each drawn copper wire independently contacting one of the conductive structures, thereby forming multiple independent and parallel conductive loops. In this case, the currents in each conductive loop do not interfere with each other. Since the physical properties of each drawn copper wire are basically the same, and each drawn copper wire passes through the same alternating magnetic field, the current generated in each conductive loop is also basically the same, which can also ensure the consistency of the annealing effect of multiple drawn copper wires.

[0050] When multiple conductive structures are formed on the first winding wheel 200, optionally, the first winding wheel 200 can be a wheel-shaped structure formed by multiple conductive disks and multiple insulating disks interlacing and stacked along their axes, with each drawn copper wire contacting one of the conductive disks to form a conductive circuit. Of course, the first winding wheel 200 can also adopt other configurations, such as integrating multiple spaced conductive structures on the outer peripheral surface of the first winding wheel 200.

[0051] Furthermore, please refer to the following: Figure 2 , Figure 4 and Figure 5 To ensure the stability of multiple drawn copper wires wound on the first winding wheel 200, optionally, the first winding wheel 200 is provided with multiple first grooves 210 and multiple second grooves 220; the multiple first grooves 210 and multiple second grooves 220 are arranged alternately. The multiple first grooves 210 are used to accommodate multiple drawn copper wires introduced into the first winding wheel 200; the multiple second grooves 220 are used to accommodate multiple drawn copper wires led out from the second winding wheel 300 to the first winding wheel 200. That is to say, when the drawn copper wires are introduced onto the first winding wheel 200, the first grooves 210 and the second grooves 220 can accommodate the drawn copper wires, which can ensure the stability of the drawn copper wires wound on the first winding wheel 200, and at the same time avoid interference between adjacent drawn copper wires. At the same time, the first groove 210 and the second groove 220 contain the drawn copper wire, thereby restricting and positioning the drawn copper wire. This prevents the drawn copper wire from shifting or jumping relative to the first winding wheel 200 during the wire routing process. It also prevents sudden contact and separation between the drawn copper wire and the first winding wheel 200, which could lead to the formation of an electric arc. This avoids the electric arc from causing ablation on the surface of the drawn copper wire, and prevents phenomena such as melting spots from appearing on the surface of the drawn copper wire, thereby preventing a reduction in the surface flatness of the drawn copper wire.

[0052] Since the multiple first grooves 210 and second grooves 220 are staggered, they can be divided into multiple groove groups. Each groove group includes adjacent first grooves 210 and second grooves 220. Each drawn copper wire corresponds to one groove group. In other words, when each drawn copper wire is first introduced into the first winding wheel 200, it is accommodated in the first groove 210 of the corresponding groove group, and when it is introduced into the first winding wheel 200 for the second time, it is accommodated in the second groove 220 of the corresponding groove group. In this case, the distance of the drawn copper wire offset in the axial direction of the first winding wheel 200 is smaller, thereby making the tilt angle of the drawn copper wire in the conductive circuit smaller. This can prevent the problem of interference with other components due to the excessive span of the drawn copper wire in the axial direction of the first winding wheel 200, and at the same time, it can facilitate the passage of the drawn copper wire through the electromagnetic induction device 400.

[0053] Optionally, the depth of the first groove 210 is greater than the depth of the second groove 220. After the drawn copper wire undergoes annealing, the length of the drawn copper wire in the conductive circuit increases. When the depth of the second groove 220 is less than the depth of the first groove 210, the winding radius of the drawn copper wire at the second groove 220 can be increased, thereby increasing the winding length. This helps to tighten the drawn copper wire and prevents it from loosening and detaching from the first winding wheel 200, thus avoiding the generation of an electric arc due to sudden detachment or contact between the drawn copper wire and the first winding wheel 200.

[0054] To further ensure the stability of the drawn copper wire wound on the first winding wheel 200, optionally, in some embodiments, the bottom of the first groove 210 forms an arc-shaped first groove bottom, and the bottom of the second groove 220 forms an arc-shaped second groove bottom. By accommodating the drawn copper wire with the arc-shaped first and second groove bottoms, the first and second groove bottoms can fit more tightly with the drawn copper wire, increasing the contact area and further improving the stability of the drawn copper wire. The cross-sectional radius of the first groove bottom is larger than that of the second groove bottom. Since the diameter of the drawn copper wire shrinks after annealing, setting the cross-sectional radius of the second groove bottom to be smaller facilitates a stable fit between the drawn copper wire and the second groove bottom, improving the stability of the drawn copper wire. Of course, in other embodiments, the arc-shaped first and second groove bottoms can be omitted, and a planar groove bottom can be used, such as... Figure 4 .

[0055] In this embodiment, the electromagnetic induction device 400 has a coil forming a cylindrical spiral structure. Multiple drawn copper wires pass through the coil, parallel to its center line. The magnetic field lines of the alternating magnetic field formed inside the cylindrical spiral coil are approximately parallel to its center line. Therefore, when the drawn copper wires pass through the coil parallel to its center line, the drawn copper wires are approximately parallel to the magnetic field lines. This prevents the formation of induced eddy currents on the drawn copper wires, thus avoiding overheating, peeling, and oxidation on the wire surface. It is worth noting that when induced eddy currents are generated on the drawn copper wires, the skin effect of these currents can easily cause high temperatures on the wire surface, leading to overheating, peeling, and oxidation.

[0056] Optionally, the cylindrical helical structure can be viewed as a coil extending along the helical path on the outer surface of the cylindrical structure, thereby forming a cylindrical helical structure. The cylindrical helical structure can include both cylindrical and prismatic helical structures.

[0057] Furthermore, in this embodiment, the electromagnetic induction device 400 also includes a guide structure 410, which is prismatic in shape. The coil is wound around the outer periphery of the guide structure 410 along a spiral path, forming a prismatic spiral structure. The guide structure 410 has multiple parallel guide channels inside, through which multiple drawn copper wires pass. Firstly, setting the overall structure of the coil as a prismatic spiral structure not only allows multiple drawn copper wires to pass through in an orderly manner but also saves a significant amount of space, thus reducing the overall volume of the electromagnetic induction device 400. Secondly, compared to a cylindrical spiral structure, the magnetic flux density generated inside the coil is greater, which is beneficial for providing sufficient magnetic field strength with low energy consumption. Secondly, by setting up multiple parallel guide channels, on the one hand, multiple guide channels can separate multiple drawn copper wires, avoiding interference between multiple drawn copper wires; on the other hand, by guiding and restricting the drawn copper wires through the guide channels, it can ensure that the drawn copper wires follow the preset path, prevent the copper wires from shaking and causing unstable current, and also ensure that the drawn copper wires remain parallel to the magnetic field lines, avoiding the formation of induced eddy currents.

[0058] Optionally, in this embodiment, the guide structure 410 can be formed of a ceramic structure. On the one hand, its insulating properties can prevent electric arcs between the copper wire and the guide structure 410. On the other hand, the ceramic structure can form a smoother contact surface, avoiding scratches on the outer surface of the drawn copper wire.

[0059] In addition, in Figure 2For example, in this embodiment, there are two electromagnetic induction devices 400, each targeting a different region of the conductive circuit. The two electromagnetic induction devices 400 can be controlled relatively independently. The strength of the alternating magnetic field in the conductive circuit can be adjusted by changing the number of activated electromagnetic induction devices 400, thereby adjusting the strength of the induced current formed in the conductive circuit and ultimately adjusting the temperature of the drawn copper wire in the conductive circuit.

[0060] Of course, in this embodiment, one end of the coil can be configured with a movable connector. This movable structure can be connected to any position of the coil as needed, thereby adjusting the number of turns of the coil connected to the circuit. By adjusting the number of turns of the coil connected to the circuit, the intensity of the alternating magnetic field generated by the coil can be adjusted, thereby also adjusting the intensity of the induced current generated in the conductive circuit, achieving the purpose of adjusting the temperature generated on the drawn copper wire in the conductive circuit.

[0061] Based on this, the alternating magnetic field strength of the conductive circuit can be adjusted by changing the number of electromagnetic induction devices 400 connected and the number of coil turns connected. The various options for the number of electromagnetic induction devices 400 connected, combined with the various options for the number of coil turns connected, can form multiple gear settings. These multiple gear settings can adapt to the annealing of various types of drawn copper wires, increasing the applicability of the electromagnetic induction annealing equipment 10 for multi-head wire drawing machines and meeting diverse user needs.

[0062] In this embodiment, please refer to the following: Figure 2 and Figure 3 The electromagnetic induction annealing equipment 10 for multi-head wire drawing machines also includes multiple combing structures 500. Multiple spaced combing protrusions 510 are formed on each combing structure 500, and a combing gap 511 is formed between any two combing protrusions 510. The multiple combing gaps 511 formed on the combing structure 500 are used to allow multiple drawn copper wires to pass through. The combing structure 500 can comb the multiple drawn copper wires, preventing interference between them, and also ensuring that the multiple drawn copper wires can follow a preset route. In this embodiment, combing structures 500 are provided on both sides of the first winding wheel 200 and both sides of the second winding wheel 300 in the wire drawing direction.

[0063] Optionally, in the case of Figure 2In this example, there are two second winding wheels 300, spaced apart. One second winding wheel 300 corresponds to the side where the first winding wheel 200 leads out the drawn copper wire and serves to receive the drawn copper wire. The drawn copper wire between this second winding wheel 300 and the first winding wheel 200 is in a vertical position. The other second winding wheel 300 corresponds to the side where the first winding wheel 200 introduces the drawn copper wire and serves to lead it out. The drawn copper wire between this second winding wheel 300 and the first winding wheel 200 is also in a vertical position. Notably, a combing structure 500 is provided between the two second winding wheels 300 to comb the path of the drawn copper wire between the two second winding wheels 300, preventing the drawn copper wire from interfering with each other.

[0064] Furthermore, in this embodiment, any two adjacent combing protrusions 510 are staggered in the routing direction of the drawn copper wire. Figure 3 In this example, multiple combing protrusions 510 are arranged in two rows, with the protrusions 510 in each row staggered. In other words, any one protrusion 510 in the upper row corresponds to the area between two adjacent protrusions 510 in the lower row. However, the combing gap 511 is formed by both one protrusion 510 in the upper row and one protrusion 510 in the lower row. By staggering the protrusions 510 that form the combing gap 511, the space between the two protrusions 510 for the drawn copper wire to pass through is expanded, facilitating the passage of the drawn copper wire. Simultaneously, it prevents the two protrusions 510 from clamping the drawn copper wire, thus avoiding deformation due to compression. Furthermore, the staggered arrangement of the two protrusions 510 allows the combing gap 511 to accommodate copper wires of various diameters.

[0065] It is worth noting that in this embodiment, the multiple combing protrusions 510 are connected one by one along the direction perpendicular to the drawn copper wire to form a wavy line. It should be understood that in other embodiments, other arrangements of the combing protrusions 510 can also be used. For example, the line connecting the multiple combing protrusions 510 along the direction perpendicular to the drawn copper wire can be a straight line inclined to the drawn copper wire, or it can form an arc, etc. Alternatively, the multiple combing protrusions 510 can be arranged along a straight path perpendicular to the direction of the drawn copper wire.

[0066] In addition, in this embodiment, the electromagnetic induction annealing equipment 10 for the multi-head wire drawing machine also includes a cooling structure. The cooling structure is disposed on the supporting body 100 and is used to provide cooling for the annealed copper wire, preventing the annealing effect from being affected by excessive heating time. Optionally, the cooling structure can be liquid-cooled. For example, the cooling structure includes a container for holding coolant, a storage device for storing coolant, and a pump assembly for circulating coolant. In this case, after the copper wire is drawn out from the first winding wheel 200, the copper wire can enter the container for cooling under the guidance of the auxiliary wheel, while the pump assembly continuously circulates the coolant in the container and the coolant in the storage device to ensure that the copper wire passing through the container can be cooled. The cooling structure can also employ air cooling. For example, the cooling structure includes multiple nozzles for air jetting. After the drawn copper wire is led out from the first winding wheel 200, an auxiliary wheel can guide the drawn copper wire to the area corresponding to the nozzle. The gas-liquid mixture ejected by the nozzle provides cooling to the drawn copper wire. Of course, the cooling structure can also employ both liquid cooling and air cooling simultaneously.

[0067] In summary, in the electromagnetic induction annealing equipment 10 for the multi-head wire drawing machine, after multiple copper wires are introduced, they first pass around the first winding wheel 200, and each wire contacts the conductive structure. After passing around the second winding wheel 300, the wires again wind around the first winding wheel 200, simultaneously contacting the conductive structure. This creates multiple conductive circuits formed by the portions of the copper wires wound around the first and second winding wheels 200 and the conductive structure. When an alternating magnetic field passes through these conductive circuits, an induced current is generated within them. The Joule heating generated by this induced current heats the copper wires, thus achieving the annealing process. Because the induced current is instantaneously generated throughout the entire conductive circuit, the drawn copper wire within the circuit can undergo uniform heating and annealing, avoiding problems such as peeling and overheating oxidation caused by localized high temperatures. This prevents unevenness on the surface of the drawn copper wire, thus improving the technical problem of surface unevenness that easily occurs after copper wire annealing in existing technologies. Furthermore, the alternating current passes through the center line of the coil, and when the coil generates an alternating magnetic field, the drawn copper wire is approximately parallel to the magnetic field lines. This avoids the generation of induced eddy currents on the drawn copper wire. Based on this, it prevents the induced eddy currents from generating high temperatures on the surface of the drawn copper wire due to the skin effect, thereby avoiding surface overheating and overheating oxidation of the drawn copper wire. This further improves the technical problem of surface unevenness that easily occurs after copper wire annealing in existing technologies. In addition, the comb structure 500 can restrict the position of multiple drawn copper wires and also serve as a positioning guide. With the comb structure 500 set at multiple positions along the trace path of the drawn copper wires, the stability of the drawn copper wires can be ensured, preventing the current changes caused by the jump of the drawn copper wires from affecting the annealing effect. It can also ensure that the multiple drawn copper wires are arranged in parallel, which helps to prevent interference between adjacent drawn copper wires and the occurrence of electric arcs between adjacent drawn copper wires.

[0068] Based on the electromagnetic induction device for multi-head wire drawing machines provided above, this embodiment also provides an annealing process.

[0069] Please see Figure 6 The annealing process includes:

[0070] S1. Multiple drawn copper wires are introduced from the first winding wheel 200, pass through the electromagnetic induction device 400 after the drawn copper wires pass around the first winding wheel 200, and pass around the first winding wheel 200 again after the drawn copper wires pass around the second winding wheel 300.

[0071] In other words, the copper wires can be laid out along a preset routing path in advance, so that after the electromagnetic induction device of the multi-head wire drawing machine is started, the drawn copper wires can be smoothly routed along the preset path.

[0072] S2. Start the first winding wheel 200 and the second winding wheel 300 so that the drawn copper wire can run continuously along the preset path.

[0073] Activating the first winding wheel 200 and the second winding wheel 300 means activating the drive device used to drive the first winding wheel 200 and the second winding wheel 300, enabling them to rotate synchronously with the drawing of the copper wire, thus avoiding friction caused by relative displacement between the copper wire and the first winding wheel 200 and the second winding wheel 300. By achieving continuous drawing of the copper wire, continuous annealing of the copper wire can be achieved. It is worth noting that the power for drawing the copper wire can be provided by a winch device that collects the annealed copper wire at the end. Other auxiliary rollers for tensioning or guiding can also be installed on the supporting body 100, while the first winding wheel 200, the second winding wheel 300, and the auxiliary rollers are only for facilitating the tensioning or guiding of the copper wire.

[0074] S3. Activate the electromagnetic induction device 400 to generate an alternating magnetic field.

[0075] After the electromagnetic induction device 400 is activated and an alternating magnetic field is formed, an induced current begins to form in the conductive circuit. The induced current generates heat in the conductive circuit, thereby achieving the purpose of annealing the drawn copper wire in the conductive circuit.

[0076] S4. Monitor the temperature of multiple drawn copper wires, and control the intensity of the alternating magnetic field generated by the electromagnetic induction device 400 to increase or decrease based on the acquired temperature data.

[0077] By monitoring the temperature of the drawn copper wire, it can be determined whether the heat generated by the induced current can provide an effective annealing effect. If the temperature is insufficient, the strength of the alternating magnetic field can be adjusted by adjusting the number of coil turns or the number of electromagnetic induction devices 400 connected to the electromagnetic induction device 400, thereby adjusting the current intensity in the conductive circuit to increase the temperature generated on the drawn copper wire and ensure that the drawn copper wire can be effectively annealed.

[0078] To facilitate temperature monitoring of multiple drawn copper wires, a non-contact temperature monitoring device, such as an infrared temperature monitor, can be installed on the supporting body 100. Furthermore, to facilitate automatic adjustment of the alternating magnetic field strength, the electromagnetic induction annealing equipment 10 for the multi-head wire drawing machine can also include a controller. The controller is electrically connected to the temperature monitoring device and simultaneously electrically connected to multiple electromagnetic induction devices 400. The controller can control the electromagnetic induction devices 400 to adjust based on the temperature data detected by the temperature monitoring device, thereby automatically adjusting the alternating magnetic field strength. In this context, in the case of… Figure 2 In the case of an example, the electromagnetic induction annealing equipment 10 for a multi-head wire drawing machine includes two electromagnetic induction devices 400. In this case, both electromagnetic induction devices 400 are electrically connected to a controller. The controller can control the start and stop of the two electromagnetic induction devices 400 respectively, thereby adjusting the number of electromagnetic induction devices 400 that form an alternating magnetic field and thus adjusting the intensity of the alternating magnetic field. Alternatively, the controller can also adjust the number of turns of the coil connected to the circuit, thereby adjusting the intensity of the alternating magnetic field generated by the electromagnetic induction device 400.

[0079] It is worth noting that in some other embodiments, temperature monitoring can be eliminated, and the number of electromagnetic induction devices 400 connected and the number of turns connected to each coil can be manually controlled by human judgment.

[0080] In summary, the annealing process provided in this embodiment can be applied to the electromagnetic induction annealing equipment 10 for the multi-head wire drawing machine described above. By controlling the continuous routing of the drawn copper wire, the wire continuously passes through the area forming a conductive loop, allowing for continuous annealing and increasing production capacity. Furthermore, because the temperature of the drawn copper wire can be monitored in real time, effective annealing of the wire can be ensured.

[0081] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. An electromagnetic induction annealing device (10) for a multi-head wire drawing machine, used for annealing multiple drawn copper wires, characterized in that, The electromagnetic induction annealing equipment (10) for the multi-head wire drawing machine includes: Supporting body (100); A first winding wheel (200) is rotatably disposed on the supporting body (100); at least a portion of the first winding wheel (200) forms a conductive structure; The second winding wheel (300) is rotatably disposed on the supporting body (100); when multiple drawn copper wires are introduced, each drawn copper wire passes around the first winding wheel (200) and contacts the conductive structure; after the drawn copper wire passes around the second winding wheel (300), it passes around the first winding wheel (200) again and is led out and contacts the conductive structure; the portion of each drawn copper wire wound around the first winding wheel (200) and the second winding wheel (300) together with the conductive structure forms a conductive circuit, and multiple drawn copper wires form multiple parallel conductive circuits; An electromagnetic induction device (400) is disposed between the first winding wheel (200) and the second winding wheel (300) to generate an alternating magnetic field; the plurality of conductive loops all pass through the alternating magnetic field.

2. The electromagnetic induction annealing equipment (10) for a multi-head wire drawing machine according to claim 1, characterized in that, The electromagnetic induction device (400) has a coil forming a cylindrical spiral structure; a plurality of the drawn copper wires pass through the coil and parallel to the center line of the coil.

3. The electromagnetic induction annealing equipment (10) for a multi-head wire drawing machine according to claim 2, characterized in that, The electromagnetic induction device (400) further includes a guide structure (410), which is prismatic in shape. The coil is wound around the outer periphery of the guide structure (410) along a spiral path to form a prismatic spiral structure. The guide structure (410) has multiple parallel guide channels inside, and multiple wires are drawn through the multiple guide channels respectively.

4. The electromagnetic induction annealing equipment (10) for a multi-head wire drawing machine according to claim 1, characterized in that, The first winding wheel (200) has a plurality of first grooves (210) and a plurality of second grooves (220); the plurality of first grooves (210) and the plurality of second grooves (220) are staggered; the plurality of first grooves (210) are used to accommodate a plurality of the drawn copper wires introduced into the first winding wheel (200); the plurality of second grooves (220) are used to accommodate a plurality of the drawn copper wires led out from the second winding wheel (300) to the first winding wheel (200).

5. The electromagnetic induction annealing equipment (10) for a multi-head wire drawing machine according to claim 4, characterized in that, The depth of the first groove (210) is greater than the depth of the second groove (220).

6. The electromagnetic induction annealing equipment (10) for a multi-head wire drawing machine according to claim 4, characterized in that, The bottom of the first groove (210) forms a first groove bottom in the shape of an arc, and the bottom of the second groove (220) forms a second groove bottom in the shape of an arc; the cross-sectional radius of the first groove bottom is greater than the cross-sectional radius of the second groove bottom.

7. The electromagnetic induction annealing equipment (10) for a multi-head wire drawing machine according to claim 1, characterized in that, The electromagnetic induction annealing equipment (10) for the multi-head wire drawing machine also includes multiple combing structures (500), on which multiple spaced combing protrusions (510) are formed, and a combing gap (511) is formed between any two of the combing protrusions (510); the multiple combing gaps (511) formed on the combing structure (500) are used to allow multiple of the drawn copper wires to pass through respectively; In the direction of the wire drawing of the copper wire, the combing structure (500) is provided on both sides of the first winding wheel (200), and the combing structure (500) is provided on both sides of the second winding wheel (300).

8. The electromagnetic induction annealing equipment (10) for a multi-head wire drawing machine according to claim 7, characterized in that, Any two adjacent comb protrusions (510) are staggered in the routing direction of the drawn copper wire.

9. The electromagnetic induction annealing equipment (10) for a multi-head wire drawing machine according to claim 1, characterized in that, The first winding wheel (200) forms the conductive structure as a whole.

10. An annealing process, applied to the electromagnetic induction annealing equipment (10) for a multi-head wire drawing machine as described in any one of claims 1-9, characterized in that, The annealing process includes: Multiple drawn copper wires are introduced from the first winding wheel (200), pass through the electromagnetic induction device (400) after the drawn copper wires pass around the first winding wheel (200), and pass around the first winding wheel (200) again after the drawn copper wires pass around the second winding wheel (300) and are led out. Start the first winding wheel (200) and the second winding wheel (300) so that the drawn copper wire can run continuously along the preset path; The electromagnetic induction device (400) is activated, causing the electromagnetic induction device (400) to generate an alternating magnetic field; The temperature of multiple drawn copper wires is monitored, and the alternating magnetic field strength generated by the electromagnetic induction device (400) is increased or decreased based on the acquired temperature data.

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