JPH0739014B2 - Annealing equipment in the manufacture of plated rectangular wire - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an annealing device in the production of a flat rectangular wire with plating used as a medium wire material for laminated cables, for example.

[Conventional technology]

Conventionally, this type of flat rectangular wire with plating is used for a laminated cable by laminating several flat rectangular wires W with plating in parallel as shown in FIG. 7, and as a manufacturing method thereof, for example, as shown in FIG. A method in which a metal layer b of tin or the like is continuously formed by plating on the surface of a wide copper plate a which is annealed and sent after being rolled to a predetermined thickness, and the plated copper plate a is cut into a predetermined width by a slitter or the like to manufacture. However, in this case, there is a defect that the metal layer b is not formed on both side surfaces of the product because it is cut off after plating. Therefore, as shown in FIG. 8, first, for example, a round copper plate c having an outer diameter of 0.15 mm to 0.40 mm is formed. Are continuously rolled to form a rectangular shape having a thickness of 0.03 mm to 0.1 mm and a width of 0.6 mm to 1.2 mm, the rectangular copper wire d is continuously annealed, and then the rectangular copper wire d is For example, continuous immersion in a plating bath f containing molten tin e, and tin After depositing the, so that passed through the drawing dies g, the continuous production of tin-plated with rectangular shaped copper wire as the plating thickness 1.5Myu～2myu.

[Problems to be Solved by the Invention]

However, in the case of the above-mentioned manufacturing method, the drawing die g is used in the plating step, and the line passing hole h of the drawing die g is, for example, 0.03 mm to 0.1 mm vertically and 0.6 mm to 1.
Since it is required to have a rectangular hole of 2 mm, it is very difficult and expensive to manufacture a drawing die, and in terms of accuracy, it is not possible to obtain a product with a uniform metal layer. is there.

It is also possible to adopt electroplating instead of the above-mentioned immersion plating, but the cross section of the rectangular wire is quadrangular and there are corner edges at the four corners. However, it has a disadvantage that a good product may not be obtained in some cases because the plating thickness is likely to be non-uniform.

Therefore, in order to solve such a problem, the applicant has carried out a plating step of continuously forming a metal layer on the surface of a round wire which is continuously transferred, and then continuously forming the plated round wire into a rectangular shape. A method for producing a flat rectangular wire with plating was proposed, which comprises a rolling step of rolling into a flat wire and an annealing step of continuously annealing the flat wire with plating. The present invention was developed to realize good annealing in order to realize this manufacturing method.

[Means for Solving the Problems]

The present invention is intended to solve these disadvantages, and the gist thereof is a plating step for continuously forming a metal layer on the surface of a round wire which is continuously transferred, and then the rounded wire with plating. An annealing apparatus in the production of a plated rectangular wire for producing a plated rectangular wire by a rolling step of continuously rolling the wire into a rectangular shape and then an annealing step of continuously annealing the plated rectangular wire. The flat rectangular wire with plating is provided with an inlet electrode, a middle electrode and an outlet electrode for continuously energizing and heating the wire, and in the preheating zone between the inlet electrode and the middle electrode, the wire path is It is maintained at a temperature lower than the melting temperature of the metal layer by making it longer, and in the heating zone between the middle electrode and the outlet electrode, it is maintained at the annealing temperature of the flat rectangular wire with plating and the metal layer on the surface in the wire path. Cooling that can suppress melting of In the annealing apparatus in the manufacture of plated with rectangular-shaped line, characterized in that which is configured by providing the.

〔Example〕

1 to 4 are explanatory views of a method for manufacturing a flat rectangular wire with plating, which is the basis of the present invention, and FIG. 5 is an embodiment of an annealing apparatus according to the present invention used in an annealing step in the manufacturing method. Is shown.

1 to 4, the outer diameter is 0.05 as shown in FIG.
mm-0.40 mm drawn copper wire 1 is continuously transferred,
Then, as shown in FIG. 2, a tin metal layer 2 is plated on the surface of the continuously transferred round wire 1 by an electroplating apparatus to a thickness of 1.
5μ to 2μ is formed (plating process), and then this plated round wire 3 is formed with a thickness of 0.03mm to 0.1mm and a width as shown in FIG.
Continuously rolled into a flat shape of 0.6 mm to 1.2 mm (rolling process),
Next, as shown in FIG. 4, the plated flat rectangular wire 4 is continuously annealed (annealing step), whereby the annealed plated flat rectangular wire 5 is continuously manufactured.

Incidentally, instead of the above electroplating, there is a case where the plating is carried out by continuously immersing the molten tin in the same manner as described above and then passing through a drawing die to perform plating.

In the above-mentioned manufacturing method, unlike the conventional method, instead of first rolling into a rectangular shape and then plating, the plating is first performed and then rolling into a rectangular shape. Since it is a linear wire, it can be electroplated with a uniform thickness, a product with a uniform thickness of the metal layer 2 can be obtained, and the wire passing hole of the drawing die used for immersion plating can be a circular hole, so the drawing die Is easy to manufacture, and a highly accurate drawing die can be obtained.
It is possible to obtain a product with

In FIG. 5, the annealing device used in the annealing step is the inlet electrode 7 for heating by continuously energizing the flat rectangular wire 4 with plating with a power source 6, in this case a DC power source of 40V, 100A. And an outlet electrode 9, in which case the voltage between the inlet electrode 7 and the middle electrode 8 and between the middle electrode 8 and the outlet electrode 9 are the same. In the preheating zone P between the electrode 8 and the electrode 8, the line path is increased by a plurality of insulating rolls 10 to increase the line resistance and lower than the melting temperature of the metal layer 2. In this case, the melting temperature of tin is about 300. Since the temperature is 150 ° C., the temperature is maintained at 150 ° C., and in the heating zone H between the middle electrode 8 and the outlet electrode 9, the annealing temperature of the flat rectangular wire 4 with plating, in this case, about 650 ° C. to 700 ° C. In the cold insulation part 11 capable of suppressing the melting of the metal layer 2, in this case, the temperature of 50 ℃ ~ 55 ℃ A water tank containing the material obtained by adding rust inhibitor is provided to.

Here, if the line resistance is increased by lengthening the line path, the temperature becomes lower because the current becomes smaller and the Joule heat becomes smaller, and in the case of a general electric heating method, the line path of the preheating zone P is obtained. The length la is 4 to 5 times as long as the line path length lr of the heating zone H. In this case, the length is 8 to 10 times, so that the current ratio is Becomes

In the above embodiment of the annealing apparatus, melting of the metal layer 2 in the preheating zone P is suppressed, and in the heating zone H, the surface of the wire is annealed while being cooled by the cold insulating section 11, so that the metal layer 2 is melted. Can be annealed while suppressing.

The material of the wire and the metal layer is not limited to copper wire and tin.

Further, the cold insulation unit 11 is not limited to water, but gas such as steam or nitrogen gas may be used.

〔The invention's effect〕

As described above, according to the present invention, in the production of the flat wire with plating, the plating is performed first and then the flat wire is rolled into a flat wire. , It is possible to obtain a product with a uniform metal layer, and the drawing die used for dip plating may have circular holes for line passing, which facilitates the manufacture of the drawing die and makes it possible to obtain a highly accurate drawing die. It is possible to obtain a product having a metal layer having a uniform thickness.

In carrying out this production, in this annealing step, the melting of the metal layer in the preheating zone is suppressed, and in the heating zone, the surface of the wire is annealed while being cooled by the cold insulation part while suppressing the melting of the metal layer. Can be annealed,
Good annealing is possible, and the excellent manufacturing method can be realized.

[Brief description of drawings]

The drawings show an embodiment of the present invention and are shown in FIGS.
The figure is a cross-sectional view of the line during its manufacturing process, FIG. 5 is its annealing apparatus, FIG. 6 is a process explanatory view of a conventional method, FIG. 7 is its product cross-sectional view, and FIG. 8 is a process of another conventional method. FIG. 9 is an explanatory view of the plating process, and FIG. 10 is a front view of the drawing die. P ... preheating zone, H ... heating zone, 1 ... round wire,
2 ... metal layer, 3 ... plated round wire, 4,5 ... plated flat wire, 7 ... inlet electrode, 8 ... middle electrode, 9 ...
Exit electrode, 11 ... Cooling part.

Claims (1)

[Claims] 1. A plating step of continuously forming a metal layer on the surface of a round wire that is continuously transferred, a rolling step of continuously rolling the round wire with plating into a rectangular shape, and then a step of rolling the metal wire. An annealing device for producing a flat rectangular wire with plating by an annealing step of continuously annealing a flat rectangular wire with plating, wherein the flat rectangular wire with plating is continuously energized and heated. An inlet electrode for, a middle electrode and an outlet electrode are provided, and the preheating zone between the inlet electrode and the middle electrode is held at a temperature lower than the melting temperature of the metal layer by lengthening its line path, In the heating zone between the middle electrode and the outlet electrode, a cold insulation part capable of holding the annealing temperature of the flat rectangular wire with plating and suppressing the melting of the metal layer on the surface is provided in the wire path. Manufacture of plated rectangular wire Definitive annealing equipment.