Manufacturing method of copper-aluminum doubling voice coil

Abstract

The invention provides a manufacturing method of a copper-aluminum doubling voice coil, which comprises the following steps of: preheating an aluminum wire which is not painted, doubling and twisting copper wires and the aluminum wire which are not painted, cooling the twisted copper-aluminum wire, wrapping polyester paint and polyamine paint on the twisted copper-aluminum wire, and curing to obtain a copper-aluminum twisted pair; and winding the copper-aluminum twisted pair on the voice coil skeleton to obtain the copper-aluminum doubling voice coil. According to the invention, the copper-aluminum twisted pair is prepared by twisting the copper-aluminum twisted pair, the copper-aluminum twisted pair is wound on the voice coil framework to prepare the copper-aluminum doubled voice coil, and the copper-aluminum twisted pair is used as the wire of the voice coil, so that the total mass of the wire of the voice coil is remarkably reduced, the resistance value of the wire is reduced, the response speed of the voice coil is improved, and the tone quality of the loudspeaker is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of electroacoustic conversion, and in particular relates to a method for manufacturing a copper-aluminum parallel-wire voice coil. Background Art

[0002] As a key component in audio equipment, voice coils are widely used in sound conversion devices such as speakers and headphones. Its working principle is based on the principles of electromagnetic induction and vibration. When current passes through the voice coil, a magnetic field is generated in the voice coil. This magnetic field interacts with the permanent magnetic field fixed in the speaker, generating a force that drives the voice coil to vibrate. Since the voice coil is usually connected to the diaphragm of the speaker (such as a diaphragm made of a paper cone, plastic film or other material), this vibration will be transmitted to the diaphragm, causing the diaphragm to vibrate and drive the air molecules to move, ultimately generating sound waves.

[0003] Existing voice coils are usually made of copper wires with good conductivity, but the density of the copper wires is relatively high, which increases the overall weight of the voice coil, slows down the response speed of the voice coil, and causes high-frequency distortion in the speaker. Summary of the invention

[0004] The object of the present invention is to provide a method for manufacturing a copper-aluminum parallel voice coil to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical scheme: a method for manufacturing a copper-aluminum parallel voice coil, preheating an unpainted aluminum wire, paralleling and twisting the unpainted copper wire and the aluminum wire, cooling the twisted copper-aluminum wires, wrapping the twisted copper-aluminum wires with polyester paint, and obtaining a copper-aluminum twisted pair after the polyamine paint is cured, and the copper-aluminum twisted pair is wound on a voice coil frame to obtain a copper-aluminum parallel voice coil.

[0006] Preferably, the operation of twisting the unpainted copper wire and the aluminum wire into a pair comprises: taking the copper wire as the central axis, winding the aluminum wire on the copper wire in a spiral manner.

[0007] Preferably, the aluminum coil wound on the copper wire in a spiral manner has a coil pitch d of 2 cm to 4 cm.

[0008] Preferably, when the unpainted aluminum wire is preheated, the preheating temperature of the aluminum wire is 100° C.-110° C.

[0009] Preferably, the temperature reduction treatment operation of the twisted copper and aluminum wires includes: immersing the twisted copper and aluminum wires in 50° C. mineral oil for cooling, and the immersion time is 3s-5s.

[0010] Preferably, the wire diameter of the copper wire is smaller than the wire diameter of the aluminum wire.

[0011] Preferably, the ratio of the wire diameter of the copper wire to the wire diameter of the aluminum wire is 1:2.

[0012] Preferably, the cross-sectional shapes of the copper wire and the aluminum wire are both circular.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] The present invention twists copper and aluminum parallel wires into a copper-aluminum twisted pair wire, and then winds the copper-aluminum twisted pair wire on a voice coil frame to form a copper-aluminum parallel wire voice coil. The copper-aluminum twisted pair wire is used as the conductor of the voice coil, which significantly reduces the total mass of the bass coil conductor and reduces the resistance value of the conductor, thereby increasing the response speed of the voice coil and improving the sound quality of the speaker. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural diagram of the copper-aluminum twisted pair wire of the present invention.

[0016] Figure 2 It is a cross-sectional structural diagram of the copper-aluminum twisted pair wire of the present invention. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] Embodiment 1:

[0019] like Figure 1-Figure 2 As shown, the present invention provides a method for making a copper-aluminum parallel voice coil, preheating an unpainted aluminum wire, twisting the unpainted copper wire and aluminum wire in parallel, cooling the twisted copper-aluminum wire, wrapping the twisted copper-aluminum wire with polyester paint, and obtaining a copper-aluminum twisted pair after the polyamine paint is cured, and winding the copper-aluminum twisted pair on a voice coil frame to obtain a copper-aluminum parallel voice coil. The operation of twisting the unpainted copper wire and aluminum wire in parallel includes: taking the copper wire as the central axis, the aluminum wire is spirally wound on the copper wire. The aluminum coil pitch d spirally wound on the copper wire is 2cm-4cm. When preheating the unpainted aluminum wire, the preheating temperature of the aluminum wire is 100℃-110℃. The operation of cooling the twisted copper-aluminum wire includes: soaking the twisted copper-aluminum wire in 50℃ mineral oil for cooling, and the soaking time is 3s-5s. The wire diameter of the copper wire is smaller than the wire diameter of the aluminum wire. The ratio of the wire diameter of the copper wire to the wire diameter of the aluminum wire is 1: 2. The cross-sectional shapes of the copper wire and the aluminum wire are both circular.

[0020] Through the above technical scheme, the present invention twists copper and aluminum parallel wires into copper-aluminum twisted pair wires, and then winds the copper-aluminum twisted pair wires on a voice coil frame to form a copper-aluminum parallel wire voice coil. The copper-aluminum twisted pair wires are used as the conductor of the voice coil, which significantly reduces the total mass of the bass coil conductor and reduces the resistance value of the conductor, thereby increasing the response speed of the voice coil and improving the sound quality of the speaker.

[0021] Embodiment 2:

[0022] like Figure 1-Figure 2 As shown, the aluminum wire is preheated first. During automated production, the aluminum wire is passed through a constant temperature baking device to ensure that the temperature of the aluminum wire is stable. The purpose of preheating the aluminum wire is to improve its softness in the subsequent twisting process and reduce the stress of the aluminum wire during winding, thereby ensuring the stability of the twisted pair structure. After that, the preheated aluminum wire is twisted together with the unpainted copper wire. During the twisting process, the copper wire and the aluminum wire are intertwined under a certain tension and bending angle to form a new copper-aluminum twisted pair structure. The copper-aluminum twisted pair can take into account the advantages of both copper and aluminum materials, and has the advantages of light weight and low resistance. After twisting, the copper-aluminum wire is cooled, and the cooling process is slow cooling to reduce the micro-deformation caused by material expansion or contraction. The copper-aluminum wire after twisting is wrapped with polyester paint. During the automated production process, the copper-aluminum twisted pair can be passed through polyester paint, so that the copper-aluminum twisted pair is quickly wrapped with polyester paint, and then cured by polyurethane paint to ensure that a solid insulating layer is formed on the surface of the paint film. This process can not only increase the copper-aluminum parallel voice coil's ability to resist electrical interference, but also effectively improve its corrosion resistance and extend the service life of the voice coil. The use of polyester paint can ensure that the voice coil wire maintains good electrical properties during long-term use and avoids the degradation of electrical properties caused by oxidation or corrosion. After the paint is cured, the copper-aluminum twisted pair can be used in the actual production process of the voice coil. At this time, the copper-aluminum twisted pair that has been painted and cured is wound on the voice coil frame to form the final copper-aluminum parallel voice coil. The conductor of the copper-aluminum parallel voice coil can significantly reduce the overall mass of the voice coil. At the same time, due to the complementary conductive properties of copper and aluminum wires, the resistance of the voice coil conductor is also reduced. Through the application of the copper-aluminum parallel twisted pair structure, the response speed of the voice coil is improved, and the voice coil can respond to signal changes more quickly, thereby improving the performance of the speaker in the high-frequency band and reducing high-frequency distortion. When the voice coil is working, due to the optimization of the copper-aluminum parallel structure, the overall mass is lighter, allowing the speaker to adjust the position of the diaphragm faster, thereby achieving more accurate sound output. The use of aluminum wire reduces the overall mass of the voice coil, while the copper wire provides sufficient conductivity to ensure that the voice coil can maintain good electrical performance at high frequencies.

[0023] The present invention, when performing the parallel twisting operation, winds the unpainted copper wire and aluminum wire in a specific manner to improve the production efficiency of the voice coil and ensure that the aluminum wire is not easily damaged during the process. Specifically, the operation is to use the copper wire as the central axis and wind the aluminum wire on the copper wire in a spiral manner. The main purpose of this winding method is to make full use of the higher tensile performance of the copper wire and make up for the disadvantage of the poor tensile performance of the aluminum wire. During the twisting operation, the copper wire can share the tension of the entire twisted pair in the process of manufacturing the voice coil, thereby avoiding the aluminum wire from being broken or damaged due to excessive tension. The tensile strength of the aluminum wire is relatively low, and it is easy to break when the tension is too large. This winding method effectively reduces the tension burden of the aluminum wire in the twisting process and protects the integrity of the aluminum wire. In the twisting process, since the copper wire is the central axis, it provides the main bearing capacity of the entire structure, and the aluminum wire is almost not directly subjected to tension. The copper wire and the aluminum wire are tightly combined in a spiral winding manner, so that the two can complement each other in electrical conduction performance, and a more stable twisted pair is formed through this winding structure.

[0024] In the copper-aluminum twisted pair, the aluminum coil pitch d that is spirally wound on the copper wire is controlled at 2cm-4cm. When the pitch d is less than 2cm, the total length of the aluminum wire will increase or decrease, resulting in an increase in the resistance of the copper-aluminum twisted pair, which will increase the heat generated by the voice coil and affect the sound quality and service life of the speaker; when the pitch d is greater than 4cm, the aluminum wire is easily torn when the copper-aluminum twisted pair is wound around the voice coil frame.

[0025] When preheating the unpainted aluminum wire, the preheating temperature of the aluminum wire is set between 100°C and 110°C. The preheating operation of the aluminum wire is to ensure that the aluminum wire can be more smoothly wound with the copper wire in the subsequent twisting process and to improve its bonding with the copper wire. The aluminum wire is relatively fragile at room temperature, and is prone to breakage or deformation, especially during processing. By preheating the aluminum wire, the flexibility of the aluminum wire can be improved, thereby reducing the breakage problem caused by excessive hardness of the aluminum wire during processing.

[0026] The cooling treatment operation of the twisted copper and aluminum wires of the present invention includes immersing the twisted copper and aluminum wires in 50°C mineral oil for cooling, the purpose of which is to control the cooling speed of the aluminum wires to avoid excessive thermal stress in the aluminum wires due to too fast cooling, thereby affecting their physical properties and structural stability. By immersing the copper and aluminum twisted pair wires in mineral oil, the temperature can be gradually cooled, thereby avoiding stress concentration caused by excessive temperature difference in the aluminum wires during the sudden temperature drop. The temperature of the mineral oil is set to 50°C to ensure that the cooling process is neither too fast nor too slow. This temperature is sufficient to relieve thermal stress and can effectively control the temperature difference between the surface and the inside of the aluminum wire. The immersion time is set to between 3 seconds and 5 seconds, which can ensure that the copper and aluminum twisted pair wires achieve a smooth temperature transition in a short time.

[0027] The wire diameter of the copper wire of the present invention is smaller than that of the aluminum wire, and the wire diameter ratio of the copper wire to the aluminum wire is 1:2. The purpose of this setting is to reduce the overall weight of the copper-aluminum twisted pair cable by reasonably selecting the ratio of the copper wire to the aluminum wire, while enhancing the tensile strength of the aluminum wire. In the structure of the copper-aluminum twisted pair cable, the copper wire plays an important role in reducing the overall mass due to its better conductivity, while the aluminum wire plays an important role in reducing the overall mass due to its lighter properties. The design of the copper wire with a smaller wire diameter not only reduces the mass of the copper wire itself, but also enables the aluminum wire to play a greater supporting role in the entire voice coil. Since the tensile strength of the aluminum wire is relatively low, its main role in the twisted pair cable is to share part of the load by increasing the total amount of material. However, due to the smaller wire diameter of the copper wire, its electrical performance advantage in the twisted pair cable is maintained, and the copper wire bears more mechanical loads, so the overall twisted pair cable achieves a balance between weight and strength. The wire diameter ratio of copper wire and aluminum wire is set to 1:2. This ratio allows the copper wire to occupy a smaller proportion, further reducing the overall mass of the voice coil, making the voice coil respond faster during operation and reducing the low-frequency response insensitivity or high-frequency distortion caused by excessive mass. At the same time, this wire diameter ratio can also effectively improve the tensile strength of the aluminum wire during the twisting process, ensuring that the aluminum wire is not easy to break during processing. In the actual use of the voice coil, due to the synergistic effect of the copper wire and the aluminum wire, the voice coil can provide stable electrical performance with lower mass.

[0028] The cross-sectional shapes of the copper wire and the aluminum wire of the present invention are both circular, and the selection of this shape helps to improve the smooth progress of the copper-aluminum wire twisting process. The circular cross-section allows the copper wire and the aluminum wire to contact and entwine more evenly when twisted, thereby ensuring the overall structural stability of the twisted pair. The circular cross-sectional design also has good bending resistance and flexibility, and the copper-aluminum wire can be bent more easily and maintain its shape during processing. This characteristic enables the copper-aluminum twisted pair to adapt to the dynamic changes of the voice coil in practical applications, ensuring that the voice coil is not easily deformed during long-term operation, and extending the service life of the voice coil. The circular cross-section also helps reduce the stress concentration that may occur during twisting, making the copper-aluminum wire more stable during the entire voice coil production process and not prone to breakage or damage.

[0029] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0030] The above description is only used to illustrate the technical solution of the present invention rather than to limit it. Other modifications or equivalent substitutions made to the technical solution of the present invention by ordinary technicians in this field should be included in the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solution of the present invention.

Claims

1. A method for manufacturing a copper-aluminum parallel voice coil, characterized in that: The unpainted aluminum wire is preheated, the unpainted copper wire and the aluminum wire are twisted in parallel, the twisted copper-aluminum wires are cooled, the twisted copper-aluminum wires are coated with polyester paint, the polyamine paint is cured to obtain a copper-aluminum twisted pair wire, the copper-aluminum twisted pair wire is wound on a voice coil frame to obtain a copper-aluminum parallel voice coil.

2. The method for manufacturing a copper-aluminum parallel voice coil according to claim 1, characterized in that: The operation of twisting the unpainted copper wire and the aluminum wire into a pair comprises: taking the copper wire as the central axis, winding the aluminum wire on the copper wire in a spiral manner.

3. The method for manufacturing a copper-aluminum parallel voice coil according to claim 2, characterized in that: The aluminum coils wound in a spiral manner on the copper wire have a coil pitch d of 2 cm to 4 cm.

4. The method for manufacturing a copper-aluminum parallel voice coil according to claim 1, characterized in that: When preheating the unpainted aluminum wire, the preheating temperature of the aluminum wire is 100°C-110°C.

5. The method for manufacturing a copper-aluminum parallel voice coil according to claim 1, characterized in that: The temperature reduction treatment operation of the twisted copper and aluminum wires includes: immersing the twisted copper and aluminum wires in 50° C. mineral oil for cooling, and the immersion time is 3s-5s.

6. The method for manufacturing a copper-aluminum parallel voice coil according to claim 1, characterized in that: The wire diameter of the copper wire is smaller than the wire diameter of the aluminum wire.

7. The method for manufacturing a copper-aluminum parallel voice coil according to claim 6, characterized in that: The ratio of the wire diameter of the copper wire to the wire diameter of the aluminum wire is 1:

2.

8. The method for manufacturing a copper-aluminum parallel voice coil according to claim 1, characterized in that: The cross-sectional shapes of the copper wire and the aluminum wire are both circular.

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