JPH0261211B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention provides a method for removing the insulation coating from the terminal portion of the electric wire.
The present invention relates to an electric wire terminal processing method in which the exposed core wire is preliminarily soldered.

[Prior Art] In order to make it easier to connect the terminal portions of electric wires, it has been conventionally practiced to remove the insulation coating from the terminal portions and pre-solder the core wires. However, since the core wire of an electric wire is generally formed by twisting a large number of fine wires together, there is a troublesome problem that the end portion of the core wire tends to come undone when the insulation coating is removed. Therefore, before pre-soldering, it is necessary to go through the troublesome process of re-twisting the ends of the unraveled core wires, and once they are twisted together, it is difficult to return the unraveled wires to their original small diameter. difficult,
For example, there is a drawback that it becomes difficult to pass the end of the core wire through a through hole of a printed circuit board.

In particular, when applying solder only to the tip of a long exposed core wire, there is a high risk that flux will adhere to the exposed core wire portion to which solder does not adhere, which will easily cause rust and cause electrical failure later. .

[Object of the Invention] An object of the present invention is to provide a method for processing the end of a wire, which can properly treat the end of the core wire when the insulation coating of the end of the wire is removed and the end of the core wire is pre-soldered. It is about providing.

[Summary of the invention] The gist of the present invention for achieving the above object is as follows:
A first step of peeling off the insulation coating on the terminal end of the electric wire to a length that prevents the core wire from unraveling, and immersing the end section of the core wire exposed in the first step in a solder bath to apply solder to the core wire. a second step of adhering, and further peeling off the insulating coating to a required length;
A method for processing an end of an electric wire, comprising a third step of cutting the tip of the portion of the core wire to which solder is attached.

[Embodiments of the Invention] The method according to the present invention will be explained in detail based on illustrated embodiments.

In Figure 1 a to f, a wire 1 is paired with two core wires 2.
This is an example of the terminal processing process in the case where the terminal is composed of a and 2b. First, as shown in a, the core wires 2a, 2 are inserted into the insulation coating 3 at the end of the electric wire 1 using a knife blade.
Make a cut 4 to separate b and perform the crotch split.

Next, as shown in b, the terminal portions of the insulating coating 3 are slightly removed to slightly expose the terminal portions of the core wires 2a and 2b. Since this exposed length is small, the core wires 2a and 2b are maintained in a state in which they are hardly unraveled.

Here, as shown in c, the flux 5 is attached to the exposed end portions of the core wires 2a and 2b by dropping,
Furthermore, this part is dipped in molten solder in a solder bath.
Preliminary solder 6 is applied as shown in FIG.

Next, as shown in e, a portion indicated by the cutting line C1-C1 near the end of the portion to which the preliminary solder 6 is attached is cut.

Further, as shown in f, the insulation coating 3 is cut to a required length, for example, from the cutting line C2-C2 shown in e, and then peeled.

By doing this, the end portions of the core wires 2a and 2b to which the preliminary solder 6 is attached and the portions to which no solder is attached are exposed as shown in f.

In addition, in the above steps, the step of making the slit 4 in step a may be performed after the cutting step in e. Of course, if there is only one core wire, this splitting step is not necessary.

FIG. 2 shows an example of a wire end processing machine for continuously processing steps a to f shown in FIG.
The electric wires placed one after another on the infinite caterpillar 10,
Sequentially, splitting is performed in process section A, then slight peeling is performed in process section B as shown in FIG. After dropping, preliminary solder 6 is attached in process section D, and core wire 2a, to which solder 6 is attached, is further attached in process section E.
The terminal portion of 2b is cut off, and then, in process section F, the skin is peeled to the required length. In the figure, 12 indicates a solder bath, and 13 indicates a control panel.

[Effects of the Invention] As explained above, the method for treating the ends of electric wires according to the present invention involves peeling off the end portion of the insulation coating short enough to prevent the core wire from coming undone, solidifying the exposed end portion of the core wire with preliminary solder, and then Since the core wire is peeled to the required length, the core wire does not come undone, and the conventional step of twisting together the ends of the unraveled core wire can be omitted. In addition, since the end of the core wire is hardened with solder without unraveling and is then cut in the middle of the part where the solder is attached, the diameter of the core wire can be maintained as thin as it is, making it easier for wiring work in the next process. Extremely advantageous.

[Brief explanation of drawings]

The drawings show an embodiment of the method for treating the ends of electric wires according to the present invention, and FIGS.
The figure is a front view of a wire end treatment machine that implements the method of the present invention. 1 is an electric wire, 2a and 2b are core wires, 3 and 3a are insulation coatings, 4 is a notch, 5 is a flux, and 6 is a preliminary solder.

Claims (1)

[Scope of Claims] 1. A first step of peeling off the insulation coating at the end of the electric wire by a length that does not loosen the core wire, and placing the end portion of the core wire exposed in the first step in a solder bath. a second step of applying solder to the core wire by dipping;
A method for processing an end of an electric wire, comprising a third step of further peeling off the insulating coating to a required length and cutting off the tip of the portion of the core wire to which solder is attached. 2. The electric wire end treatment method according to claim 1, further comprising a step of splitting the insulation coatings of the plurality of core wires before the first step. 3. The electric wire terminal treatment method according to claim 1, further comprising a step of splitting the insulation coatings of the plurality of core wires after the third step.