Online medium-high frequency alternating current heating annealing circuit structure of metal wire

Abstract

The utility model relates to an on-line medium-high frequency alternating current heating annealing circuit structure of a metal wire, which comprises a frequency / voltage adjustable medium-high frequency power supply, a transformer, a transformer iron core, the metal wire, an auxiliary wheel and a conductive wheel, and the metal wire, the auxiliary wheel and the conductive wheel form an annealing loop for secondary side output of the medium-high frequency transformer and no conductive electrode connection; a metal wire is wound on the conductive wheel, the metal wire enters from the conductive wheel, sequentially passes through the at least two auxiliary wheels and then is discharged from the conductive wheel, and the conductive wheel and the metal wire wound on the conductive wheel form a secondary circuit of the medium-high frequency transformer. The metal wire can be heated by medium-high frequency alternating current and eddy current generated by medium-high frequency alternating current, so that the heating temperature of the metal wire is more uniform. A heating loop is connected without electrodes, so that the abrasion and replacement of the electrodes are reduced, the surface discharge phenomenon of the metal wire is reduced, and the metal annealing efficiency of the wire is improved.

Description

Technical field

[0001] The utility model relates to the technical field of wire annealing, in particular to an online medium- and high-frequency alternating current heating annealing circuit structure for metal wires. [Background Technology]

[0002] During the copper wire drawing process or after it is drawn into a finished product, annealing must be performed. Annealing, also known as toughening or softening, is a process in which copper wires that have been deformed and hardened by cold working are subjected to heat treatment to restore the wire's plasticity, eliminate hardening, and maintain good electrical and mechanical properties.

[0003] The metal wire annealing circuit structure currently used usually connects electrodes at both ends of the metal wire, and the electrodes are connected to direct current, so that current passes directly through the metal wire, and the wire is heated by the resistance of the metal wire itself. After reaching the annealing temperature, it is quickly water-cooled to achieve the purpose of annealing. This method has several defects: first, there is a contact between the metal wire and the electrode. Not only will there be friction at the contact, causing wear of the electrode, but the contact is also prone to discharge due to poor contact, causing easy damage to the electrode. Secondly, the current generated by direct current is stable and cannot produce magnetic field changes. During the annealing process, an alternating magnetic field needs to be generated by electromagnetic induction to produce an eddy current effect to heat the copper wire. If direct current is used, eddy currents will only be generated on the surface of the copper wire, and the internal conductive layer cannot be heated to a sufficient temperature, affecting the annealing effect and reducing the quality and service life of the copper wire. [Utility Model Content]

[0004] In order to solve the above problems, the purpose of the present invention is to provide an online medium-high frequency AC heating annealing circuit structure for a metal wire using variable AC power.

[0005] To achieve the above-mentioned objectives, the technical solution adopted by the present invention is as follows: an online medium-high frequency AC heating annealing circuit structure for metal wire, comprising a frequency / voltage adjustable medium-high frequency power supply, a transformer, a transformer core, a metal wire, an auxiliary wheel, and a conductive wheel. The metal wire, auxiliary wheel, and conductive wheel constitute an annealing circuit connected to the secondary side output of the medium-high frequency transformer without a conductive electrode; a metal wire is wound around the conductive wheel. After entering the conductive wheel, the metal wire passes through at least two auxiliary wheels in sequence and is then discharged from the conductive wheel. The conductive wheel and the metal wire wound around the conductive wheel form the secondary side circuit of the medium-high frequency transformer.

[0006] The on-line medium-high frequency AC heating annealing circuit structure of a metal wire in the utility model is further configured as follows: the transformer is a medium-high frequency transformer.

[0007] The online medium-high frequency AC heating annealing circuit structure of a metal wire in the present invention is further configured as follows: the number of the auxiliary wheels is at least two, and the auxiliary wheels and the conductive wheels enclose a triangular or polygonal annealing circuit.

[0008] The present invention further provides a circuit structure for online medium- and high-frequency AC heating annealing of metal wires, wherein the conductive wheel is provided with at least two grooves, within which the metal wire is wound, thereby forming electrical contact with the guide wheel. The grooves ensure reliable contact between the metal wire and the conductive wheel, resulting in superior electrical conductivity.

[0009] Compared with the prior art, the present invention has the following beneficial effects: the above-mentioned online medium-high frequency AC heating annealing circuit structure for a metal wire directly uses the secondary side of the medium-high frequency transformer as the annealing circuit for the metal wire, passes the stretched metal wire through an energized conductive wheel, and allows AC to pass directly through the metal wire, causing the metal wire to anneal while passing. Due to the high frequency of the AC, the metal wire can be heated by both medium-high frequency AC and eddy current generated by the medium-high frequency AC current, making the heating temperature of the metal wire more uniform. The heating circuit has no electrode connection, which reduces electrode wear and replacement, and reduces the surface discharge phenomenon of the metal wire. The secondary side output circuit of the medium-high frequency transformer serves as the heating annealing circuit for the metal wire, which improves the metal annealing electrical efficiency of the wire.

[0010] It uses medium and high frequency transformers to give the metal wire the following advantages after annealing:

[0011] 1. Improve lattice quality: During the medium frequency annealing process, the metal is heated to an appropriate temperature, then kept warm and then slowly cooled. This treatment method can make the internal structure of the metal reach or approach a state of equilibrium, thereby improving the lattice quality.

[0012] 2. Eliminate internal stress: Medium frequency annealing can reduce the residual stress inside the metal, stabilize the size, and reduce the tendency of deformation and cracking. By eliminating internal stress, the stability and service life of the metal can be significantly improved.

[0013] 3. Grain refinement: During the medium frequency annealing process, the metal grains will recrystallize, thereby refining the grains. Fine grains can increase the strength and toughness of the metal and improve its mechanical properties.

Brief Description of the Drawings

[0014] Figure 1 It is a schematic diagram of the secondary side primary core structure of the utility model.

[0015] Figure 2 This is a schematic diagram of the secondary side's double and multiple core stringing structure of the utility model.

[0016] In the figure: 1. Frequency / voltage adjustable medium and high frequency power supply, 2. Medium and high frequency transformer, 3. Transformer core, 4. Auxiliary wheel, 5. Metal wire, 6. Conductive wheel. [Specific implementation method]

[0017] The following is a further detailed description of the on-line medium-high frequency AC heating annealing circuit structure of a metal wire according to the present invention through specific embodiments.

[0018] like Figure 1 、 Figure 2 As shown, an online medium-high frequency AC heating annealing circuit structure for metal wire includes a frequency / voltage adjustable medium-high frequency power supply 1, a medium-high frequency transformer 2, a transformer core 3, a metal wire 5, an auxiliary wheel 4, and a conductive wheel 6. The metal wire 5, the auxiliary wheel 4, and the conductive wheel 6 constitute an annealing circuit connected to the secondary side output of the medium-high frequency transformer 2 without a conductive electrode. The metal wire 5 is wound around the conductive wheel 6. After entering the conductive wheel 6, the metal wire 5 passes through at least two auxiliary wheels 4 in sequence and is then discharged from the conductive wheel 6. The conductive wheel 6 and the metal wire 5 wound around the conductive wheel 6 form the secondary side circuit of the medium-high frequency transformer 2.

[0019] The online medium-high frequency AC heating annealing circuit structure of a metal wire 5 in the present invention is further configured as follows: the transformer is a medium-high frequency transformer 2 .

[0020] The medium frequency transformer is used to provide the metal wire 5 with the following advantages after annealing:

[0021] 1. Improve lattice quality: During the medium frequency annealing process, the metal is heated to an appropriate temperature, then kept warm and then slowly cooled. This treatment method can make the internal structure of the metal reach or approach a state of equilibrium, thereby improving the lattice quality.

[0022] 2. Eliminate internal stress: Medium frequency annealing can reduce the residual stress inside the metal, stabilize the size, and reduce the tendency of deformation and cracking. By eliminating internal stress, the stability and service life of the metal can be significantly improved.

[0023] 3. Grain refinement: During the medium frequency annealing process, the metal grains will recrystallize, thereby refining the grains. Fine grains can increase the strength and toughness of the metal and improve its mechanical properties.

[0024] In this embodiment, there are at least two auxiliary wheels 4 , and the auxiliary wheels 4 and the conductive wheel 6 together form a triangular or polygonal annealing loop.

[0025] As a preferred embodiment, the conductive wheel 6 is provided with at least two grooves, and the metal wire 5 is wound in the grooves to form electrical contact with the guide wheel. The provision of the grooves ensures reliable contact between the metal wire 5 and the conductive wheel 6, and excellent electrical conductivity.

[0026] The above-described online medium- and high-frequency AC heating and annealing circuit structure for a metal wire 5 utilizes the secondary side of the medium- and high-frequency transformer 2 as the annealing circuit for the metal wire 5. The stretched metal wire 5 passes through an energized conductive wheel 6, allowing AC current to flow directly through the metal wire 5, annealing the wire as it passes. Due to the high frequency of the AC current, the metal wire 5 experiences both medium- and high-frequency AC heating and eddy current heating generated by the medium- and high-frequency AC current, resulting in a more uniform heating temperature for the metal wire 5. The heating circuit lacks electrode connections, reducing electrode wear and replacement, and minimizing surface discharge in the metal wire 5. The secondary side output circuit of the medium- and high-frequency transformer 2 serves as the heating and annealing circuit for the metal wire 5, improving the electrical efficiency of the metal annealing process.

[0027] The above embodiments are merely illustrative of the principles and effects of the present invention, as well as some embodiments of its application, and are not intended to limit the present invention. It should be noted that a person skilled in the art can make several modifications and improvements without departing from the inventive concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention.

Claims

1. A circuit structure for online medium- and high-frequency AC heating annealing of metal wires, comprising a medium- and high-frequency power supply with adjustable frequency and voltage, a transformer, a transformer core, metal wires, auxiliary wheels, and conductive wheels, characterized in that: The metal wire, auxiliary wheel, and conductive wheel constitute the secondary side output of the medium and high frequency transformer, and an annealing circuit without conductive electrode connection; the metal wire is wound around the conductive wheel, and after entering the conductive wheel, the metal wire passes through at least two auxiliary wheels in sequence and is then discharged from the conductive wheel. The conductive wheel and the metal wire wound around the conductive wheel form the secondary side circuit of the medium and high frequency transformer.

2. The online medium-high frequency AC heating annealing circuit structure for metal wire according to claim 1, characterized in that: The transformer is a medium-high frequency transformer.

3. The on-line medium-high frequency AC heating annealing circuit structure for a metal wire according to claim 1 or 2, characterized in that: There are at least two auxiliary wheels, and the auxiliary wheels and the conductive wheels together form a triangular or polygonal annealing loop.

4. The on-line medium-high frequency AC heating annealing circuit structure for a metal wire according to claim 1 or 2, characterized in that: At least two grooves are provided in the conductive wheel, and the metal wire is wound in the grooves to form electrical contact with the guide wheel.

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