Transformer coil film wrapping and sintering process

[0015] S1, removing the oxide layer on the surface of the copper wire.

[0016] Specifically, the oxide layer on the surface of the copper wire can be removed by mechanical processing, or the oxide layer on the surface of the copper wire can be removed by soaking and dissolving in a chemical solvent. The adhesion between the oxide layer and the copper body is not enough. Early removal will affect the bonding force between the subsequent outer cladding and the copper body.

[0017] S2, polishing the outer wall of the copper wire.

[0018] Specifically, the burr on the surface wall of the copper wire is mainly removed by means of mechanical processing, and the surface of the copper body is smoothed, thereby increasing the bonding force between the outer cladding layer and the copper body.

[0019] S3, wrapping a polyimide tape on the surface of the copper wire.

[0020] Specifically, the polyimide tape is evenly wound on the surface of the copper wire.

[0021] S4. Make the copper wire pass along the axial direction of the high-frequency helical induction coil and generate heat at a speed of 6-8m/min. When the instant temperature of the copper wire reaches a predetermined temperature threshold, control the The difference between the instant temperature of the copper wire and the temperature threshold is within a certain range, preferably, the instant temperature of the copper wire is equal to the temperature threshold, and the temperature threshold is conducive to the uniform welding of the polyimide tape To the surface wall of the copper wire, the temperature threshold is 350-380°C.

[0022] Specifically, a high-frequency current is passed through the high-frequency spiral induction coil, the copper wire passes through it to generate heat, and several temperature measuring points are set on the copper wire.

[0023] When the instant temperature of the temperature measuring point is lower than the temperature threshold, the current through the spiral induction coil is increased, so that the instant temperature of the temperature measuring point continues to rise, thereby approaching the temperature threshold; when the instant temperature of the temperature measuring point is equal to When the temperature threshold is reached, the current passing through the spiral induction coil remains constant, so that the instant temperature of the temperature measurement point remains unchanged; when the instant temperature of the temperature measurement point is higher than the temperature threshold, the current passing through the spiral induction coil The current decreases, so that the instant temperature of the temperature measurement point decreases, thus approaching the temperature threshold. Therefore, the difference between the instant temperature of the copper wire and the temperature threshold is controlled within a certain range.

[0024] The above is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto, any person familiar with the technical field within the technical scope disclosed in the present invention, according to the technical solution of the present invention Any equivalent replacement or change of the inventive concepts thereof shall fall within the protection scope of the present invention.