JPH03167717A - Manufacture of enameled wire having wire drawing process in line - Google Patents

Abstract

PURPOSE:To eliminate the generation of damage on the surface at the time of feeding and restrict the consumption of a die and the generation of copper powder. by using a hard-drawn copper wire as the basic material, and drawing the annealed copper wire in a wire drawing process. CONSTITUTION:A hard wire (hard-drawn copper wire) 1 as the basic material is fed out from an appropriate feeding source such as a bobbin 2A or a carrier 2B, and is led into an annealing furnace 3 to be annealed, and becomes an annealed copper wire 1'. Next, the annealed copper wire 1, is led into a wire drawing device 4, and is drawn until the desired finish outer diameter is obtained, and the hard-drawn copper wire 1 hardened by drawing is led into the annealing furnace 3 (the annealing furnace 3 used before can be commonly used or another one can be used) again, and is annealed to be the annealed copper wire 1'. Thereafter, the annealed copper wire 1' is fed into an enamel baking furnace 6 through a paint coating device 5, and enamel baking is performed there. A danger that the surface of the basic material is damaged at the time of feeding is thereby eliminated, and the consumption of a die and the generation of copper powder can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a method for producing an enameled wire, which includes a wire drawing step in the line.

[Conventional technology]

As is well known, enamel-coated wire is made by coating copper wire with an electrically insulating paint called enamel and baking it.
The outer diameter of copper wire before enamel application is approximately 0.02 to 0.06 mm for ultra-fine wire baked using a horizontal furnace, and the outer diameter of ordinary wire baked using a vertical furnace is at most 1.2 mm. That's it. Therefore, the production of enamelled wire often includes a wire drawing process in which the diameter of a raw copper wire having a larger outer diameter is reduced to a desired outer diameter.

On the other hand, enamel-coated wire is wound into coils by the customer and used for transformers, motor coils, etc.
Annealed copper wire is generally used to facilitate the workability of coil winding. Therefore, the copper wire to be enamelled must be annealed and soft.

[Problem to be solved by the invention]

As is well known, copper wire hardens during the wire drawing process, and as mentioned above, the copper wire must be soft when it enters the baking furnace. In wire manufacturing methods, an important issue is how to incorporate the wire drawing process and the annealing process. Particularly at the start of the process, one issue is whether to use a hard or soft copper wire as the raw material to be set in the equipment. First, when using annealed copper wire as a raw material, it has the advantage of preventing inconveniences such as wasting dies or generating copper powder during wire drawing, but it also tends to scratch the surface of the wire during feeding. ) may lead to a fatal drawback.

[Means to solve the problem]

The present invention has been made to eliminate the above-mentioned drawbacks in the prior art, and includes a process of annealing a hard copper wire sent out from a sending source to make it into an annealed copper wire, and a process of annealing the annealed copper wire into a desired finish. In a line that includes a step of drawing the wire to the outer diameter, a step of annealing the hardened hard copper wire after drawing to make an annealed copper wire, and a step of applying enamel paint to the annealing wire and baking it. This is a method for producing an enamelled 4ν wire, which includes a wire drawing process.

[Effect]

Since hard copper wire is used as the base material for sending out from the sending source, there is no risk of scratches on the mating surface during sending out.

Since wire drawing is carried out on annealed copper wire that has been softened by the annealing process, it is possible to prevent die wear and the generation of copper powder.Also, the hard copper wire that has been hardened by wire drawing is annealed again and becomes annealed copper wire. Sent to the enamel firing process.

〔Example〕

The drawing shows an example of a situation in which the present invention is implemented, and a hard copper wire (hard copper wire) 1 that is a base material is connected to a bobbin 2.
Annealed copper wire 1
'

The soft steel wire is then led to a wire drawing device 4, where it is drawn to a desired finished outer diameter.

Hard copper hardened by the above wire drawing: a. 1 is re-L
(This annealing furnace 3 can be used in common or in a separate annealing furnace), where it is annealed and annealed copper wire 1' After that, it is sent through a paint applicator 5 to an enamel baking furnace 6, where it is baked with enamel.

The enamel-covered wire, which has been enamel-baked to become a complete product, is appropriately wound onto a winding device (not shown) such as a bobbin.

〔Effect of the invention〕

According to this invention, since a hard copper wire is used as the base material, it is possible to obtain a high-quality enamel-coated wire that does not cause scratches on the surface during storage, transportation, and especially when being sent out. Since the wire is drawn, it is possible to suppress the consumption of dies and the generation of copper powder as much as possible.

[Brief explanation of the drawing]

The drawing is an explanatory diagram showing a situation in which the method of the present invention is implemented. ■...hard copper wire, )'...mild steel wire, 2, to, 2 self ・・C(out, horse 1,...
・Annealing furnace, ...Wire drawing equipment, ...Paint coating equipment, ...Enamel baking furnace.

Claims (1)

[Claims] 1. Hard copper wires (1
) into an annealed copper wire (1'), a step of drawing the annealed copper wire (1') to a desired finished outer diameter, and a hardened hard copper wire (1) after the drawing. A method for producing an enamel-coated wire, which includes a wire drawing process in a line, which includes a step of annealing the wire again to form an annealed copper wire (1'), and a step of applying an enamel paint to the annealed copper wire (1') and baking it. .